text: /*
   * aot-compiler.c: mono Ahead of Time compiler
   *
   * Author:
   *   Dietmar Maurer (dietmar@ximian.com)
   *   Zoltan Varga (vargaz@gmail.com)
   *
   * (C) 2002 Ximian, Inc.
   * Copyright 2003-2011 Novell, Inc 
   * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
   */
  
  #include "config.h"
  #include <sys/types.h>
  #ifdef HAVE_UNISTD_H
  #include <unistd.h>
  #endif
  #ifdef HAVE_STDINT_H
  #include <stdint.h>
  #endif
  #include <fcntl.h>
  #include <ctype.h>
  #include <string.h>
  #ifndef HOST_WIN32
  #include <sys/time.h>
  #else
  #include <winsock2.h>
  #include <windows.h>
  #endif
  
  #include <errno.h>
  #include <sys/stat.h>
  
  #include <mono/metadata/abi-details.h>
  #include <mono/metadata/tabledefs.h>
  #include <mono/metadata/class.h>
  #include <mono/metadata/object.h>
  #include <mono/metadata/tokentype.h>
  #include <mono/metadata/appdomain.h>
  #include <mono/metadata/debug-helpers.h>
  #include <mono/metadata/assembly.h>
  #include <mono/metadata/metadata-internals.h>
  #include <mono/metadata/marshal.h>
  #include <mono/metadata/gc-internal.h>
  #include <mono/metadata/monitor.h>
  #include <mono/metadata/mempool-internals.h>
  #include <mono/metadata/mono-endian.h>
  #include <mono/metadata/threads-types.h>
  #include <mono/utils/mono-logger-internal.h>
  #include <mono/utils/mono-compiler.h>
  #include <mono/utils/mono-time.h>
  #include <mono/utils/mono-mmap.h>
  
  #include "mini.h"
  #include "image-writer.h"
  #include "dwarfwriter.h"
  #include "mini-gc.h"
  
  #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
  
  #if defined(__linux__) || defined(__native_client_codegen__)
  #define RODATA_SECT ".rodata"
  #elif defined(TARGET_MACH)
  #define RODATA_SECT ".section __TEXT, __const"
  #else
  #define RODATA_SECT ".text"
  #endif
  
  #define TV_DECLARE(name) gint64 name
  #define TV_GETTIME(tv) tv = mono_100ns_ticks ()
  #define TV_ELAPSED(start,end) (((end) - (start)) / 10)
  
  #ifdef TARGET_WIN32
  #define SHARED_EXT ".dll"
  #elif defined(__ppc__) && defined(TARGET_MACH)
  #define SHARED_EXT ".dylib"
  #elif defined(TARGET_MACH) && defined(TARGET_X86) && !defined(__native_client_codegen__)
  #define SHARED_EXT ".dylib"
  #elif defined(TARGET_MACH) && defined(TARGET_AMD64) && !defined(__native_client_codegen__)
  #define SHARED_EXT ".dylib"
  #else
  #define SHARED_EXT ".so"
  #endif
  
  #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
  #define ALIGN_PTR_TO(ptr,align) (gpointer)((((gssize)(ptr)) + (align - 1)) & (~(align - 1)))
  #define ROUND_DOWN(VALUE,SIZE)	((VALUE) & ~((SIZE) - 1))
  
  /* predefined values for static readonly fields without needed to run the .cctor */
  typedef struct _ReadOnlyValue ReadOnlyValue;
  struct _ReadOnlyValue {
  	ReadOnlyValue *next;
  	char *name;
  	int type; /* to be used later for typechecking to prevent user errors */
  	union {
  		guint8 i1;
  		guint16 i2;
  		guint32 i4;
  		guint64 i8;
  		gpointer ptr;
  	} value;
  };
  static ReadOnlyValue *readonly_values;
  
  typedef struct MonoAotOptions {
  	char *outfile;
  	gboolean save_temps;
  	gboolean write_symbols;
  	gboolean metadata_only;
  	gboolean bind_to_runtime_version;
  	gboolean full_aot;
  	gboolean no_dlsym;
  	gboolean static_link;
  	gboolean asm_only;
  	gboolean asm_writer;
  	gboolean nodebug;
  	gboolean dwarf_debug;
  	gboolean soft_debug;
  	gboolean log_generics;
  	gboolean log_instances;
  	gboolean direct_pinvoke;
  	gboolean direct_icalls;
  	gboolean no_direct_calls;
  	gboolean use_trampolines_page;
  	gboolean no_instances;
  	gboolean gnu_asm;
  	gboolean llvm;
  	int nthreads;
  	int ntrampolines;
  	int nrgctx_trampolines;
  	int nimt_trampolines;
  	int ngsharedvt_arg_trampolines;
  	int nrgctx_fetch_trampolines;
  	gboolean print_skipped_methods;
  	gboolean stats;
  	char *tool_prefix;
  	gboolean autoreg;
  	char *mtriple;
  	char *llvm_path;
  	char *instances_logfile_path;
  	char *logfile;
  } MonoAotOptions;
  
  typedef struct MonoAotStats {
  	int ccount, mcount, lmfcount, abscount, gcount, ocount, genericcount;
  	int code_size, info_size, ex_info_size, unwind_info_size, got_size, class_info_size, got_info_size, plt_size;
  	int methods_without_got_slots, direct_calls, all_calls, llvm_count;
  	int got_slots, offsets_size;
  	int got_slot_types [MONO_PATCH_INFO_NONE];
  	int got_slot_info_sizes [MONO_PATCH_INFO_NONE];
  	int jit_time, gen_time, link_time;
  } MonoAotStats;
  
  typedef struct MonoAotCompile {
  	MonoImage *image;
  	GPtrArray *methods;
  	GHashTable *method_indexes;
  	GHashTable *method_depth;
  	MonoCompile **cfgs;
  	int cfgs_size;
  	GHashTable **patch_to_plt_entry;
  	GHashTable *plt_offset_to_entry;
  	GHashTable *patch_to_got_offset;
  	GHashTable **patch_to_got_offset_by_type;
  	GPtrArray *got_patches;
  	GHashTable *image_hash;
  	GHashTable *method_to_cfg;
  	GHashTable *token_info_hash;
  	GHashTable *method_to_pinvoke_import;
  	GPtrArray *extra_methods;
  	GPtrArray *image_table;
  	GPtrArray *globals;
  	GPtrArray *method_order;
  	GHashTable *export_names;
  	/* Maps MonoClass* -> blob offset */
  	GHashTable *klass_blob_hash;
  	/* Maps MonoMethod* -> blob offset */
  	GHashTable *method_blob_hash;
  	guint32 *plt_got_info_offsets;
  	guint32 got_offset, plt_offset, plt_got_offset_base;
  	guint32 final_got_size;
  	/* Number of GOT entries reserved for trampolines */
  	guint32 num_trampoline_got_entries;
  	guint32 tramp_page_size;
  
  	guint32 num_trampolines [MONO_AOT_TRAMP_NUM];
  	guint32 trampoline_got_offset_base [MONO_AOT_TRAMP_NUM];
  	guint32 trampoline_size [MONO_AOT_TRAMP_NUM];
  	guint32 tramp_page_code_offsets [MONO_AOT_TRAMP_NUM];
  
  	MonoAotOptions aot_opts;
  	guint32 nmethods;
  	guint32 opts;
  	guint32 simd_opts;
  	MonoMemPool *mempool;
  	MonoAotStats stats;
  	int method_index;
  	char *static_linking_symbol;
  	mono_mutex_t mutex;
  	gboolean use_bin_writer;
  	gboolean gas_line_numbers;
  	MonoImageWriter *w;
  	MonoDwarfWriter *dwarf;
  	FILE *fp;
  	char *tmpbasename;
  	char *tmpfname;
  	GSList *cie_program;
  	GHashTable *unwind_info_offsets;
  	GPtrArray *unwind_ops;
  	guint32 unwind_info_offset;
  	char *got_symbol_base;
  	char *got_symbol;
  	char *plt_symbol;
  	char *methods_symbol;
  	GHashTable *method_label_hash;
  	const char *temp_prefix;
  	const char *user_symbol_prefix;
  	const char *llvm_label_prefix;
  	const char *inst_directive;
  	guint32 label_generator;
  	gboolean llvm;
  	MonoAotFileFlags flags;
  	MonoDynamicStream blob;
  	MonoClass **typespec_classes;
  	GString *llc_args;
  	GString *as_args;
  	char *assembly_name_sym;
  	GHashTable *plt_entry_debug_sym_cache;
  	gboolean thumb_mixed, need_no_dead_strip, need_pt_gnu_stack;
  	GHashTable *ginst_hash;
  	GHashTable *dwarf_ln_filenames;
  	gboolean global_symbols;
  	gboolean direct_method_addresses;
  	int objc_selector_index, objc_selector_index_2;
  	GPtrArray *objc_selectors;
  	GHashTable *objc_selector_to_index;
  	FILE *logfile;
  	FILE *instances_logfile;
  } MonoAotCompile;
  
  typedef struct {
  	int plt_offset;
  	char *symbol, *llvm_symbol, *debug_sym;
  	MonoJumpInfo *ji;
  	gboolean jit_used, llvm_used;
  } MonoPltEntry;
  
  #define mono_acfg_lock(acfg) mono_mutex_lock (&((acfg)->mutex))
  #define mono_acfg_unlock(acfg) mono_mutex_unlock (&((acfg)->mutex))
  
  /* This points to the current acfg in LLVM mode */
  static MonoAotCompile *llvm_acfg;
  
  #ifdef HAVE_ARRAY_ELEM_INIT
  #define MSGSTRFIELD(line) MSGSTRFIELD1(line)
  #define MSGSTRFIELD1(line) str##line
  static const struct msgstr_t {
  #define PATCH_INFO(a,b) char MSGSTRFIELD(__LINE__) [sizeof (b)];
  #include "patch-info.h"
  #undef PATCH_INFO
  } opstr = {
  #define PATCH_INFO(a,b) b,
  #include "patch-info.h"
  #undef PATCH_INFO
  };
  static const gint16 opidx [] = {
  #define PATCH_INFO(a,b) [MONO_PATCH_INFO_ ## a] = offsetof (struct msgstr_t, MSGSTRFIELD(__LINE__)),
  #include "patch-info.h"
  #undef PATCH_INFO
  };
  
  static G_GNUC_UNUSED const char*
  get_patch_name (int info)
  {
  	return (const char*)&opstr + opidx [info];
  }
  
  #else
  #define PATCH_INFO(a,b) b,
  static const char* const
  patch_types [MONO_PATCH_INFO_NUM + 1] = {
  #include "patch-info.h"
  	NULL
  };
  
  static G_GNUC_UNUSED const char*
  get_patch_name (int info)
  {
  	return patch_types [info];
  }
  
  #endif
  
  static char*
  get_plt_entry_debug_sym (MonoAotCompile *acfg, MonoJumpInfo *ji, GHashTable *cache);
  
  static void
  aot_printf (MonoAotCompile *acfg, const gchar *format, ...)
  {
  	FILE *output;
  	va_list args;
  
  	if (acfg->logfile)
  		output = acfg->logfile;
  	else
  		output = stdout;
  
  	va_start (args, format);
  	vfprintf (output, format, args);
  	va_end (args);
  }
  
  static void
  aot_printerrf (MonoAotCompile *acfg, const gchar *format, ...)
  {
  	FILE *output;
  	va_list args;
  
  	if (acfg->logfile)
  		output = acfg->logfile;
  	else
  		output = stderr;
  
  	va_start (args, format);
  	vfprintf (output, format, args);
  	va_end (args);
  }
  
  /* Wrappers around the image writer functions */
  
  static inline void
  emit_section_change (MonoAotCompile *acfg, const char *section_name, int subsection_index)
  {
  	img_writer_emit_section_change (acfg->w, section_name, subsection_index);
  }
  
  static inline void
  emit_push_section (MonoAotCompile *acfg, const char *section_name, int subsection)
  {
  	img_writer_emit_push_section (acfg->w, section_name, subsection);
  }
  
  static inline void
  emit_pop_section (MonoAotCompile *acfg)
  {
  	img_writer_emit_pop_section (acfg->w);
  }
  
  static inline void
  emit_local_symbol (MonoAotCompile *acfg, const char *name, const char *end_label, gboolean func) 
  { 
  	img_writer_emit_local_symbol (acfg->w, name, end_label, func); 
  }
  
  static inline void
  emit_label (MonoAotCompile *acfg, const char *name) 
  { 
  	img_writer_emit_label (acfg->w, name); 
  }
  
  static inline void
  emit_bytes (MonoAotCompile *acfg, const guint8* buf, int size) 
  { 
  	img_writer_emit_bytes (acfg->w, buf, size); 
  }
  
  static inline void
  emit_string (MonoAotCompile *acfg, const char *value) 
  { 
  	img_writer_emit_string (acfg->w, value); 
  }
  
  static inline void
  emit_line (MonoAotCompile *acfg) 
  { 
  	img_writer_emit_line (acfg->w); 
  }
  
  static inline void
  emit_alignment (MonoAotCompile *acfg, int size) 
  { 
  	img_writer_emit_alignment (acfg->w, size); 
  }
  
  static inline void
  emit_pointer_unaligned (MonoAotCompile *acfg, const char *target) 
  { 
  	img_writer_emit_pointer_unaligned (acfg->w, target); 
  }
  
  static inline void
  emit_pointer (MonoAotCompile *acfg, const char *target) 
  { 
  	img_writer_emit_pointer (acfg->w, target); 
  }
  
  static inline void
  emit_pointer_2 (MonoAotCompile *acfg, const char *prefix, const char *target) 
  { 
  	if (prefix [0] != '\0') {
  		char *s = g_strdup_printf ("%s%s", prefix, target);
  		img_writer_emit_pointer (acfg->w, s);
  		g_free (s);
  	} else {
  		img_writer_emit_pointer (acfg->w, target);
  	}
  }
  
  static inline void
  emit_int16 (MonoAotCompile *acfg, int value) 
  { 
  	img_writer_emit_int16 (acfg->w, value); 
  }
  
  static inline void
  emit_int32 (MonoAotCompile *acfg, int value) 
  { 
  	img_writer_emit_int32 (acfg->w, value); 
  }
  
  static inline void
  emit_symbol_diff (MonoAotCompile *acfg, const char *end, const char* start, int offset) 
  { 
  	img_writer_emit_symbol_diff (acfg->w, end, start, offset); 
  }
  
  static inline void
  emit_zero_bytes (MonoAotCompile *acfg, int num) 
  { 
  	img_writer_emit_zero_bytes (acfg->w, num); 
  }
  
  static inline void
  emit_byte (MonoAotCompile *acfg, guint8 val) 
  { 
  	img_writer_emit_byte (acfg->w, val); 
  }
  
  #ifdef __native_client_codegen__
  static inline void
  emit_nacl_call_alignment (MonoAotCompile *acfg)
  {
  	img_writer_emit_nacl_call_alignment (acfg->w);
  }
  #endif
  
  static G_GNUC_UNUSED void
  emit_global_inner (MonoAotCompile *acfg, const char *name, gboolean func)
  {
  	img_writer_emit_global (acfg->w, name, func);
  }
  
  static void
  emit_global (MonoAotCompile *acfg, const char *name, gboolean func)
  {
  	if (acfg->aot_opts.no_dlsym) {
  		g_ptr_array_add (acfg->globals, g_strdup (name));
  		img_writer_emit_local_symbol (acfg->w, name, NULL, func);
  	} else {
  		img_writer_emit_global (acfg->w, name, func);
  	}
  }
  
  static void
  emit_symbol_size (MonoAotCompile *acfg, const char *name, const char *end_label)
  {
  	img_writer_emit_symbol_size (acfg->w, name, end_label);
  }
  
  static void
  emit_string_symbol (MonoAotCompile *acfg, const char *name, const char *value)
  {
  	img_writer_emit_section_change (acfg->w, RODATA_SECT, 1);
  #ifdef TARGET_MACH
  	/* On apple, all symbols need to be aligned to avoid warnings from ld */
  	emit_alignment (acfg, 4);
  #endif
  	img_writer_emit_label (acfg->w, name);
  	img_writer_emit_string (acfg->w, value);
  }
  
  static G_GNUC_UNUSED void
  emit_uleb128 (MonoAotCompile *acfg, guint32 value)
  {
  	do {
  		guint8 b = value & 0x7f;
  		value >>= 7;
  		if (value != 0) /* more bytes to come */
  			b |= 0x80;
  		emit_byte (acfg, b);
  	} while (value);
  }
  
  static G_GNUC_UNUSED void
  emit_sleb128 (MonoAotCompile *acfg, gint64 value)
  {
  	gboolean more = 1;
  	gboolean negative = (value < 0);
  	guint32 size = 64;
  	guint8 byte;
  
  	while (more) {
  		byte = value & 0x7f;
  		value >>= 7;
  		/* the following is unnecessary if the
  		 * implementation of >>= uses an arithmetic rather
  		 * than logical shift for a signed left operand
  		 */
  		if (negative)
  			/* sign extend */
  			value |= - ((gint64)1 <<(size - 7));
  		/* sign bit of byte is second high order bit (0x40) */
  		if ((value == 0 && !(byte & 0x40)) ||
  			(value == -1 && (byte & 0x40)))
  			more = 0;
  		else
  			byte |= 0x80;
  		emit_byte (acfg, byte);
  	}
  }
  
  static G_GNUC_UNUSED void
  encode_uleb128 (guint32 value, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  
  	do {
  		guint8 b = value & 0x7f;
  		value >>= 7;
  		if (value != 0) /* more bytes to come */
  			b |= 0x80;
  		*p ++ = b;
  	} while (value);
  
  	*endbuf = p;
  }
  
  static G_GNUC_UNUSED void
  encode_sleb128 (gint32 value, guint8 *buf, guint8 **endbuf)
  {
  	gboolean more = 1;
  	gboolean negative = (value < 0);
  	guint32 size = 32;
  	guint8 byte;
  	guint8 *p = buf;
  
  	while (more) {
  		byte = value & 0x7f;
  		value >>= 7;
  		/* the following is unnecessary if the
  		 * implementation of >>= uses an arithmetic rather
  		 * than logical shift for a signed left operand
  		 */
  		if (negative)
  			/* sign extend */
  			value |= - (1 <<(size - 7));
  		/* sign bit of byte is second high order bit (0x40) */
  		if ((value == 0 && !(byte & 0x40)) ||
  			(value == -1 && (byte & 0x40)))
  			more = 0;
  		else
  			byte |= 0x80;
  		*p ++= byte;
  	}
  
  	*endbuf = p;
  }
  
  static void
  emit_unset_mode (MonoAotCompile *acfg)
  {
  	img_writer_emit_unset_mode (acfg->w);
  }
  
  static G_GNUC_UNUSED void
  emit_set_thumb_mode (MonoAotCompile *acfg)
  {
  	emit_unset_mode (acfg);
  	fprintf (acfg->fp, ".code 16\n");
  }
  
  static G_GNUC_UNUSED void
  emit_set_arm_mode (MonoAotCompile *acfg)
  {
  	emit_unset_mode (acfg);
  	fprintf (acfg->fp, ".code 32\n");
  }
  
  static inline void
  emit_code_bytes (MonoAotCompile *acfg, const guint8* buf, int size)
  {
  #ifdef TARGET_ARM64
  	int i;
  
  	g_assert (size % 4 == 0);
  	emit_unset_mode (acfg);
  	for (i = 0; i < size; i += 4)
  		fprintf (acfg->fp, "%s 0x%x\n", acfg->inst_directive, *(guint32*)(buf + i));
  #else
  	emit_bytes (acfg, buf, size);
  #endif
  }
  
  /* ARCHITECTURE SPECIFIC CODE */
  
  #if defined(TARGET_X86) || defined(TARGET_AMD64) || defined(TARGET_ARM) || defined(TARGET_POWERPC)
  #define EMIT_DWARF_INFO 1
  #endif
  
  #if defined(TARGET_ARM)
  #define AOT_FUNC_ALIGNMENT 4
  #else
  #define AOT_FUNC_ALIGNMENT 16
  #endif
  #if (defined(TARGET_X86) || defined(TARGET_AMD64)) && defined(__native_client_codegen__)
  #undef AOT_FUNC_ALIGNMENT
  #define AOT_FUNC_ALIGNMENT 32
  #endif
   
  #if defined(TARGET_POWERPC64) && !defined(__mono_ilp32__)
  #define PPC_LD_OP "ld"
  #define PPC_LDX_OP "ldx"
  #else
  #define PPC_LD_OP "lwz"
  #define PPC_LDX_OP "lwzx"
  #endif
  
  #ifdef TARGET_AMD64
  #define AOT_TARGET_STR "AMD64"
  #endif
  
  #ifdef TARGET_ARM
  #ifdef TARGET_MACH
  #define AOT_TARGET_STR "ARM (MACH)"
  #else
  #define AOT_TARGET_STR "ARM (!MACH)"
  #endif
  #endif
  
  #ifdef TARGET_ARM64
  #ifdef TARGET_MACH
  #define AOT_TARGET_STR "ARM64 (MACH)"
  #else
  #define AOT_TARGET_STR "ARM64 (!MACH)"
  #endif
  #endif
  
  #ifdef TARGET_POWERPC64
  #ifdef __mono_ilp32__
  #define AOT_TARGET_STR "POWERPC64 (mono ilp32)"
  #else
  #define AOT_TARGET_STR "POWERPC64 (!mono ilp32)"
  #endif
  #else
  #ifdef TARGET_POWERPC
  #ifdef __mono_ilp32__
  #define AOT_TARGET_STR "POWERPC (mono ilp32)"
  #else
  #define AOT_TARGET_STR "POWERPC (!mono ilp32)"
  #endif
  #endif
  #endif
  
  #ifdef TARGET_X86
  #ifdef TARGET_WIN32
  #define AOT_TARGET_STR "X86 (WIN32)"
  #elif defined(__native_client_codegen__)
  #define AOT_TARGET_STR "X86 (native client codegen)"
  #else
  #define AOT_TARGET_STR "X86 (!native client codegen)"
  #endif
  #endif
  
  #ifndef AOT_TARGET_STR
  #define AOT_TARGET_STR ""
  #endif
  
  static void
  arch_init (MonoAotCompile *acfg)
  {
  	acfg->llc_args = g_string_new ("");
  	acfg->as_args = g_string_new ("");
  
  	/*
  	 * The prefix LLVM likes to put in front of symbol names on darwin.
  	 * The mach-os specs require this for globals, but LLVM puts them in front of all
  	 * symbols. We need to handle this, since we need to refer to LLVM generated
  	 * symbols.
  	 */
  	acfg->llvm_label_prefix = "";
  	acfg->user_symbol_prefix = "";
  
  #if defined(TARGET_X86)
  	g_string_append (acfg->llc_args, " -march=x86 -mattr=sse4.1");
  #endif
  
  #if defined(TARGET_AMD64)
  	g_string_append (acfg->llc_args, " -march=x86-64 -mattr=sse4.1");
  #endif
  
  #ifdef TARGET_ARM
  	if (acfg->aot_opts.mtriple && strstr (acfg->aot_opts.mtriple, "darwin")) {
  		g_string_append (acfg->llc_args, "-mattr=+v6");
  	} else {
  #ifdef ARM_FPU_VFP
  		g_string_append (acfg->llc_args, " -mattr=+vfp2,-neon,+d16");
  		g_string_append (acfg->as_args, " -mfpu=vfp3");
  #else
  		g_string_append (acfg->llc_args, " -soft-float");
  #endif
  	}
  	if (acfg->aot_opts.mtriple && strstr (acfg->aot_opts.mtriple, "thumb"))
  		acfg->thumb_mixed = TRUE;
  
  	if (acfg->aot_opts.mtriple)
  		mono_arch_set_target (acfg->aot_opts.mtriple);
  #endif
  
  #ifdef TARGET_ARM64
  	acfg->inst_directive = ".inst";
  	if (acfg->aot_opts.mtriple)
  		mono_arch_set_target (acfg->aot_opts.mtriple);
  #endif
  
  #ifdef TARGET_MACH
  	acfg->user_symbol_prefix = "_";
  	acfg->llvm_label_prefix = "_";
  	acfg->inst_directive = ".word";
  	acfg->need_no_dead_strip = TRUE;
  	acfg->aot_opts.gnu_asm = TRUE;
  #endif
  
  #if defined(__linux__) && !defined(TARGET_ARM)
  	acfg->need_pt_gnu_stack = TRUE;
  #endif
  
  #ifdef MONOTOUCH
  	acfg->direct_method_addresses = TRUE;
  	acfg->global_symbols = TRUE;
  #endif
  }
  
  #ifdef TARGET_ARM64
  
  #include "../../../mono-extensions/mono/mini/aot-compiler-arm64.c"
  
  #endif
  
  #ifdef MONO_ARCH_AOT_SUPPORTED
  /*
   * arch_emit_direct_call:
   *
   *   Emit a direct call to the symbol TARGET. CALL_SIZE is set to the size of the
   * calling code.
   */
  static void
  arch_emit_direct_call (MonoAotCompile *acfg, const char *target, gboolean external, gboolean thumb, MonoJumpInfo *ji, int *call_size)
  {
  #if defined(TARGET_X86) || defined(TARGET_AMD64)
  	/* Need to make sure this is exactly 5 bytes long */
  	if (external && !acfg->use_bin_writer) {
  		emit_unset_mode (acfg);
  		fprintf (acfg->fp, "call %s\n", target);
  	} else {
  		emit_byte (acfg, '\xe8');
  		emit_symbol_diff (acfg, target, ".", -4);
  	}
  	*call_size = 5;
  #elif defined(TARGET_ARM)
  	if (acfg->use_bin_writer) {
  		guint8 buf [4];
  		guint8 *code;
  
  		code = buf;
  		ARM_BL (code, 0);
  
  		img_writer_emit_reloc (acfg->w, R_ARM_CALL, target, -8);
  		emit_bytes (acfg, buf, 4);
  	} else {
  		emit_unset_mode (acfg);
  		if (thumb)
  			fprintf (acfg->fp, "blx %s\n", target);
  		else
  			fprintf (acfg->fp, "bl %s\n", target);
  	}
  	*call_size = 4;
  #elif defined(TARGET_ARM64)
  	arm64_emit_direct_call (acfg, target, external, thumb, ji, call_size);
  #elif defined(TARGET_POWERPC)
  	if (acfg->use_bin_writer) {
  		g_assert_not_reached ();
  	} else {
  		emit_unset_mode (acfg);
  		fprintf (acfg->fp, "bl %s\n", target);
  		*call_size = 4;
  	}
  #else
  	g_assert_not_reached ();
  #endif
  }
  #endif
  
  /*
   * PPC32 design:
   * - we use an approach similar to the x86 abi: reserve a register (r30) to hold 
   *   the GOT pointer.
   * - The full-aot trampolines need access to the GOT of mscorlib, so we store
   *   in in the 2. slot of every GOT, and require every method to place the GOT
   *   address in r30, even when it doesn't access the GOT otherwise. This way,
   *   the trampolines can compute the mscorlib GOT address by loading 4(r30).
   */
  
  /*
   * PPC64 design:
   * PPC64 uses function descriptors which greatly complicate all code, since
   * these are used very inconsistently in the runtime. Some functions like 
   * mono_compile_method () return ftn descriptors, while others like the
   * trampoline creation functions do not.
   * We assume that all GOT slots contain function descriptors, and create 
   * descriptors in aot-runtime.c when needed.
   * The ppc64 abi uses r2 to hold the address of the TOC/GOT, which is loaded
   * from function descriptors, we could do the same, but it would require 
   * rewriting all the ppc/aot code to handle function descriptors properly.
   * So instead, we use the same approach as on PPC32.
   * This is a horrible mess, but fixing it would probably lead to an even bigger
   * one.
   */
  
  /*
   * X86 design:
   * - similar to the PPC32 design, we reserve EBX to hold the GOT pointer.
   */
  
  #ifdef MONO_ARCH_AOT_SUPPORTED
  /*
   * arch_emit_got_offset:
   *
   *   The memory pointed to by CODE should hold native code for computing the GOT
   * address. Emit this code while patching it with the offset between code and
   * the GOT. CODE_SIZE is set to the number of bytes emitted.
   */
  static void
  arch_emit_got_offset (MonoAotCompile *acfg, guint8 *code, int *code_size)
  {
  #if defined(TARGET_POWERPC64)
  	g_assert (!acfg->use_bin_writer);
  	emit_unset_mode (acfg);
  	/* 
  	 * The ppc32 code doesn't seem to work on ppc64, the assembler complains about
  	 * unsupported relocations. So we store the got address into the .Lgot_addr
  	 * symbol which is in the text segment, compute its address, and load it.
  	 */
  	fprintf (acfg->fp, ".L%d:\n", acfg->label_generator);
  	fprintf (acfg->fp, "lis 0, (.Lgot_addr + 4 - .L%d)@h\n", acfg->label_generator);
  	fprintf (acfg->fp, "ori 0, 0, (.Lgot_addr + 4 - .L%d)@l\n", acfg->label_generator);
  	fprintf (acfg->fp, "add 30, 30, 0\n");
  	fprintf (acfg->fp, "%s 30, 0(30)\n", PPC_LD_OP);
  	acfg->label_generator ++;
  	*code_size = 16;
  #elif defined(TARGET_POWERPC)
  	g_assert (!acfg->use_bin_writer);
  	emit_unset_mode (acfg);
  	fprintf (acfg->fp, ".L%d:\n", acfg->label_generator);
  	fprintf (acfg->fp, "lis 0, (%s + 4 - .L%d)@h\n", acfg->got_symbol, acfg->label_generator);
  	fprintf (acfg->fp, "ori 0, 0, (%s + 4 - .L%d)@l\n", acfg->got_symbol, acfg->label_generator);
  	acfg->label_generator ++;
  	*code_size = 8;
  #else
  	guint32 offset = mono_arch_get_patch_offset (code);
  	emit_bytes (acfg, code, offset);
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", offset);
  
  	*code_size = offset + 4;
  #endif
  }
  
  /*
   * arch_emit_got_access:
   *
   *   The memory pointed to by CODE should hold native code for loading a GOT
   * slot. Emit this code while patching it so it accesses the GOT slot GOT_SLOT.
   * CODE_SIZE is set to the number of bytes emitted.
   */
  static void
  arch_emit_got_access (MonoAotCompile *acfg, guint8 *code, int got_slot, int *code_size)
  {
  	/* Emit beginning of instruction */
  	emit_bytes (acfg, code, mono_arch_get_patch_offset (code));
  
  	/* Emit the offset */
  #ifdef TARGET_AMD64
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (unsigned int) ((got_slot * sizeof (gpointer)) - 4));
  	*code_size = mono_arch_get_patch_offset (code) + 4;
  #elif defined(TARGET_X86)
  	emit_int32 (acfg, (unsigned int) ((got_slot * sizeof (gpointer))));
  	*code_size = mono_arch_get_patch_offset (code) + 4;
  #elif defined(TARGET_ARM)
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (unsigned int) ((got_slot * sizeof (gpointer))) - 12);
  	*code_size = mono_arch_get_patch_offset (code) + 4;
  #elif defined(TARGET_ARM64)
  	arm64_emit_got_access (acfg, code, got_slot, code_size);
  #elif defined(TARGET_POWERPC)
  	{
  		guint8 buf [32];
  		guint8 *code;
  
  		code = buf;
  		ppc_load32 (code, ppc_r0, got_slot * sizeof (gpointer));
  		g_assert (code - buf == 8);
  		emit_bytes (acfg, buf, code - buf);
  		*code_size = code - buf;
  	}
  #else
  	g_assert_not_reached ();
  #endif
  }
  
  #endif
  
  #ifdef MONO_ARCH_AOT_SUPPORTED
  /*
   * arch_emit_objc_selector_ref:
   *
   *   Emit the implementation of OP_OBJC_GET_SELECTOR, which itself implements @selector(foo:) in objective-c.
   */
  static void
  arch_emit_objc_selector_ref (MonoAotCompile *acfg, guint8 *code, int index, int *code_size)
  {
  #if defined(TARGET_ARM)
  	char symbol1 [256];
  	char symbol2 [256];
  	int lindex = acfg->objc_selector_index_2 ++;
  
  	/* Emit ldr.imm/b */
  	emit_bytes (acfg, code, 8);
  
  	sprintf (symbol1, "L_OBJC_SELECTOR_%d", lindex);
  	sprintf (symbol2, "L_OBJC_SELECTOR_REFERENCES_%d", index);
  
  	emit_label (acfg, symbol1);
  	img_writer_emit_unset_mode (acfg->w);
  	fprintf (acfg->fp, ".long %s-(%s+12)", symbol2, symbol1);
  
  	*code_size = 12;
  #elif defined(TARGET_ARM64)
  	arm64_emit_objc_selector_ref (acfg, code, index, code_size);
  #else
  	g_assert_not_reached ();
  #endif
  }
  #endif
  
  /*
   * arch_emit_plt_entry:
   *
   *   Emit code for the PLT entry with index INDEX.
   */
  static void
  arch_emit_plt_entry (MonoAotCompile *acfg, int index)
  {
  #if defined(TARGET_X86)
  		guint32 offset = (acfg->plt_got_offset_base + index) * sizeof (gpointer);
  #if defined(__default_codegen__)
  		/* jmp *<offset>(%ebx) */
  		emit_byte (acfg, 0xff);
  		emit_byte (acfg, 0xa3);
  		emit_int32 (acfg, offset);
  		/* Used by mono_aot_get_plt_info_offset */
  		emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  #elif defined(__native_client_codegen__)
  		const guint8 kSizeOfNaClJmp = 11;
  		guint8 bytes[kSizeOfNaClJmp];
  		guint8 *pbytes = &bytes[0];
  		
  		x86_jump_membase32 (pbytes, X86_EBX, offset);
  		emit_bytes (acfg, bytes, kSizeOfNaClJmp);
  		/* four bytes of data, used by mono_arch_patch_plt_entry              */
  		/* For Native Client, make this work with data embedded in push.      */
  		emit_byte (acfg, 0x68);  /* hide data in a push */
  		emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  		emit_alignment (acfg, AOT_FUNC_ALIGNMENT);
  #endif /*__native_client_codegen__*/
  #elif defined(TARGET_AMD64)
  #if defined(__default_codegen__)
  		/*
  		 * We can't emit jumps because they are 32 bits only so they can't be patched.
  		 * So we make indirect calls through GOT entries which are patched by the AOT 
  		 * loader to point to .Lpd entries. 
  		 */
  		/* jmpq *<offset>(%rip) */
  		emit_byte (acfg, '\xff');
  		emit_byte (acfg, '\x25');
  		emit_symbol_diff (acfg, acfg->got_symbol, ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)) -4);
  		/* Used by mono_aot_get_plt_info_offset */
  		emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  		acfg->stats.plt_size += 10;
  #elif defined(__native_client_codegen__)
  		guint8 buf [256];
  		guint8 *buf_aligned = ALIGN_TO(buf, kNaClAlignment);
  		guint8 *code = buf_aligned;
  
  		/* mov <OFFSET>(%rip), %r11d */
  		emit_byte (acfg, '\x45');
  		emit_byte (acfg, '\x8b');
  		emit_byte (acfg, '\x1d');
  		emit_symbol_diff (acfg, acfg->got_symbol, ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)) -4);
  
  		amd64_jump_reg (code, AMD64_R11);
  		/* This should be constant for the plt patch */
  		g_assert ((size_t)(code-buf_aligned) == 10);
  		emit_bytes (acfg, buf_aligned, code - buf_aligned);
  
  		/* Hide data in a push imm32 so it passes validation */
  		emit_byte (acfg, 0x68);  /* push */
  		emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  		emit_alignment (acfg, AOT_FUNC_ALIGNMENT);
  #endif /*__native_client_codegen__*/
  #elif defined(TARGET_ARM)
  		guint8 buf [256];
  		guint8 *code;
  
  		code = buf;
  		ARM_LDR_IMM (code, ARMREG_IP, ARMREG_PC, 0);
  		ARM_LDR_REG_REG (code, ARMREG_PC, ARMREG_PC, ARMREG_IP);
  		emit_bytes (acfg, buf, code - buf);
  		emit_symbol_diff (acfg, acfg->got_symbol, ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)) - 4);
  		/* Used by mono_aot_get_plt_info_offset */
  		emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  #elif defined(TARGET_ARM64)
  		arm64_emit_plt_entry (acfg, index);
  #elif defined(TARGET_POWERPC)
  		guint32 offset = (acfg->plt_got_offset_base + index) * sizeof (gpointer);
  
  		/* The GOT address is guaranteed to be in r30 by OP_LOAD_GOTADDR */
  		g_assert (!acfg->use_bin_writer);
  		emit_unset_mode (acfg);
  		fprintf (acfg->fp, "lis 11, %d@h\n", offset);
  		fprintf (acfg->fp, "ori 11, 11, %d@l\n", offset);
  		fprintf (acfg->fp, "add 11, 11, 30\n");
  		fprintf (acfg->fp, "%s 11, 0(11)\n", PPC_LD_OP);
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  		fprintf (acfg->fp, "%s 2, %d(11)\n", PPC_LD_OP, (int)sizeof (gpointer));
  		fprintf (acfg->fp, "%s 11, 0(11)\n", PPC_LD_OP);
  #endif
  		fprintf (acfg->fp, "mtctr 11\n");
  		fprintf (acfg->fp, "bctr\n");
  		emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  #else
  		g_assert_not_reached ();
  #endif
  }
  
  static void
  arch_emit_llvm_plt_entry (MonoAotCompile *acfg, int index)
  {
  #if defined(TARGET_ARM)
  #if 0
  	/* LLVM calls the PLT entries using bl, so emit a stub */
  	/* FIXME: Too much overhead on every call */
  	fprintf (acfg->fp, ".thumb_func\n");
  	fprintf (acfg->fp, "bx pc\n");
  	fprintf (acfg->fp, "nop\n");
  	fprintf (acfg->fp, ".arm\n");
  #endif
  	/* LLVM calls the PLT entries using bl, so these have to be thumb2 */
  	/* The caller already transitioned to thumb */
  	/* The code below should be 12 bytes long */
  	/* clang has trouble encoding these instructions, so emit the binary */
  #if 0
  	fprintf (acfg->fp, "ldr ip, [pc, #8]\n");
  	/* thumb can't encode ld pc, [pc, ip] */
  	fprintf (acfg->fp, "add ip, pc, ip\n");
  	fprintf (acfg->fp, "ldr ip, [ip, #0]\n");
  	fprintf (acfg->fp, "bx ip\n");
  #endif
  	emit_set_thumb_mode (acfg);
  	fprintf (acfg->fp, ".4byte 0xc008f8df\n");
  	fprintf (acfg->fp, ".2byte 0x44fc\n");
  	fprintf (acfg->fp, ".4byte 0xc000f8dc\n");
  	fprintf (acfg->fp, ".2byte 0x4760\n");
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", ((acfg->plt_got_offset_base + index) * sizeof (gpointer)) + 4);
  	emit_int32 (acfg, acfg->plt_got_info_offsets [index]);
  	emit_unset_mode (acfg);
  	emit_set_arm_mode (acfg);
  #else
  	g_assert_not_reached ();
  #endif
  }
  
  /*
   * arch_emit_specific_trampoline_pages:
   *
   * Emits a page full of trampolines: each trampoline uses its own address to
   * lookup both the generic trampoline code and the data argument.
   * This page can be remapped in process multiple times so we can get an
   * unlimited number of trampolines.
   * Specifically this implementation uses the following trick: two memory pages
   * are allocated, with the first containing the data and the second containing the trampolines.
   * To reduce trampoline size, each trampoline jumps at the start of the page where a common
   * implementation does all the lifting.
   * Note that the ARM single trampoline size is 8 bytes, exactly like the data that needs to be stored
   * on the arm 32 bit system.
   */
  static void
  arch_emit_specific_trampoline_pages (MonoAotCompile *acfg)
  {
  #if defined(TARGET_ARM)
  	guint8 buf [128];
  	guint8 *code;
  	guint8 *loop_start, *loop_branch_back, *loop_end_check, *imt_found_check;
  	int i;
  #define COMMON_TRAMP_SIZE 16
  	int count = (mono_pagesize () - COMMON_TRAMP_SIZE) / 8;
  	int imm8, rot_amount;
  	char symbol [128];
  
  	if (!acfg->aot_opts.use_trampolines_page)
  		return;
  
  	acfg->tramp_page_size = mono_pagesize ();
  
  	sprintf (symbol, "%sspecific_trampolines_page", acfg->user_symbol_prefix);
  	emit_alignment (acfg, mono_pagesize ());
  	emit_global (acfg, symbol, TRUE);
  	emit_label (acfg, symbol);
  
  	/* emit the generic code first, the trampoline address + 8 is in the lr register */
  	code = buf;
  	imm8 = mono_arm_is_rotated_imm8 (mono_pagesize (), &rot_amount);
  	ARM_SUB_REG_IMM (code, ARMREG_LR, ARMREG_LR, imm8, rot_amount);
  	ARM_LDR_IMM (code, ARMREG_R1, ARMREG_LR, -8);
  	ARM_LDR_IMM (code, ARMREG_PC, ARMREG_LR, -4);
  	ARM_NOP (code);
  	g_assert (code - buf == COMMON_TRAMP_SIZE);
  
  	/* Emit it */
  	emit_bytes (acfg, buf, code - buf);
  
  	for (i = 0; i < count; ++i) {
  		code = buf;
  		ARM_PUSH (code, 0x5fff);
  		ARM_BL (code, 0);
  		arm_patch (code - 4, code - COMMON_TRAMP_SIZE - 8 * (i + 1));
  		g_assert (code - buf == 8);
  		emit_bytes (acfg, buf, code - buf);
  	}
  
  	/* now the rgctx trampolines: each specific trampolines puts in the ip register
  	 * the instruction pointer address, so the generic trampoline at the start of the page
  	 * subtracts 4096 to get to the data page and loads the values
  	 * We again fit the generic trampiline in 16 bytes.
  	 */
  	sprintf (symbol, "%srgctx_trampolines_page", acfg->user_symbol_prefix);
  	emit_global (acfg, symbol, TRUE);
  	emit_label (acfg, symbol);
  	code = buf;
  	imm8 = mono_arm_is_rotated_imm8 (mono_pagesize (), &rot_amount);
  	ARM_SUB_REG_IMM (code, ARMREG_IP, ARMREG_IP, imm8, rot_amount);
  	ARM_LDR_IMM (code, MONO_ARCH_RGCTX_REG, ARMREG_IP, -8);
  	ARM_LDR_IMM (code, ARMREG_PC, ARMREG_IP, -4);
  	ARM_NOP (code);
  	g_assert (code - buf == COMMON_TRAMP_SIZE);
  
  	/* Emit it */
  	emit_bytes (acfg, buf, code - buf);
  
  	for (i = 0; i < count; ++i) {
  		code = buf;
  		ARM_MOV_REG_REG (code, ARMREG_IP, ARMREG_PC);
  		ARM_B (code, 0);
  		arm_patch (code - 4, code - COMMON_TRAMP_SIZE - 8 * (i + 1));
  		g_assert (code - buf == 8);
  		emit_bytes (acfg, buf, code - buf);
  	}
  
  	/*
  	 * gsharedvt arg trampolines: see arch_emit_gsharedvt_arg_trampoline ()
  	 */
  	sprintf (symbol, "%sgsharedvt_arg_trampolines_page", acfg->user_symbol_prefix);
  	emit_global (acfg, symbol, TRUE);
  	emit_label (acfg, symbol);
  	code = buf;
  	ARM_PUSH (code, (1 << ARMREG_R0) | (1 << ARMREG_R1) | (1 << ARMREG_R2) | (1 << ARMREG_R3));
  	imm8 = mono_arm_is_rotated_imm8 (mono_pagesize (), &rot_amount);
  	ARM_SUB_REG_IMM (code, ARMREG_IP, ARMREG_IP, imm8, rot_amount);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_IP, -8);
  	ARM_LDR_IMM (code, ARMREG_PC, ARMREG_IP, -4);
  	g_assert (code - buf == COMMON_TRAMP_SIZE);
  	/* Emit it */
  	emit_bytes (acfg, buf, code - buf);
  
  	for (i = 0; i < count; ++i) {
  		code = buf;
  		ARM_MOV_REG_REG (code, ARMREG_IP, ARMREG_PC);
  		ARM_B (code, 0);
  		arm_patch (code - 4, code - COMMON_TRAMP_SIZE - 8 * (i + 1));
  		g_assert (code - buf == 8);
  		emit_bytes (acfg, buf, code - buf);
  	}
  
  	/* now the imt trampolines: each specific trampolines puts in the ip register
  	 * the instruction pointer address, so the generic trampoline at the start of the page
  	 * subtracts 4096 to get to the data page and loads the values
  	 * We again fit the generic trampiline in 16 bytes.
  	 */
  #define IMT_TRAMP_SIZE 72
  	sprintf (symbol, "%simt_trampolines_page", acfg->user_symbol_prefix);
  	emit_global (acfg, symbol, TRUE);
  	emit_label (acfg, symbol);
  	code = buf;
  	/* Need at least two free registers, plus a slot for storing the pc */
  	ARM_PUSH (code, (1 << ARMREG_R0)|(1 << ARMREG_R1)|(1 << ARMREG_R2));
  
  	imm8 = mono_arm_is_rotated_imm8 (mono_pagesize (), &rot_amount);
  	ARM_SUB_REG_IMM (code, ARMREG_IP, ARMREG_IP, imm8, rot_amount);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_IP, -8);
  
  	/* The IMT method is in v5, r0 has the imt array address */
  
  	loop_start = code;
  	ARM_LDR_IMM (code, ARMREG_R1, ARMREG_R0, 0);
  	ARM_CMP_REG_REG (code, ARMREG_R1, ARMREG_V5);
  	imt_found_check = code;
  	ARM_B_COND (code, ARMCOND_EQ, 0);
  
  	/* End-of-loop check */
  	ARM_CMP_REG_IMM (code, ARMREG_R1, 0, 0);
  	loop_end_check = code;
  	ARM_B_COND (code, ARMCOND_EQ, 0);
  
  	/* Loop footer */
  	ARM_ADD_REG_IMM8 (code, ARMREG_R0, ARMREG_R0, sizeof (gpointer) * 2);
  	loop_branch_back = code;
  	ARM_B (code, 0);
  	arm_patch (loop_branch_back, loop_start);
  
  	/* Match */
  	arm_patch (imt_found_check, code);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_R0, 4);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_R0, 0);
  	/* Save it to the third stack slot */
  	ARM_STR_IMM (code, ARMREG_R0, ARMREG_SP, 8);
  	/* Restore the registers and branch */
  	ARM_POP (code, (1 << ARMREG_R0)|(1 << ARMREG_R1)|(1 << ARMREG_PC));
  
  	/* No match */
  	arm_patch (loop_end_check, code);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_R0, 4);
  	ARM_STR_IMM (code, ARMREG_R0, ARMREG_SP, 8);
  	ARM_POP (code, (1 << ARMREG_R0)|(1 << ARMREG_R1)|(1 << ARMREG_PC));
  	ARM_NOP (code);
  
  	/* Emit it */
  	g_assert (code - buf == IMT_TRAMP_SIZE);
  	emit_bytes (acfg, buf, code - buf);
  
  	for (i = 0; i < count; ++i) {
  		code = buf;
  		ARM_MOV_REG_REG (code, ARMREG_IP, ARMREG_PC);
  		ARM_B (code, 0);
  		arm_patch (code - 4, code - IMT_TRAMP_SIZE - 8 * (i + 1));
  		g_assert (code - buf == 8);
  		emit_bytes (acfg, buf, code - buf);
  	}
  
  	acfg->tramp_page_code_offsets [MONO_AOT_TRAMP_SPECIFIC] = 16;
  	acfg->tramp_page_code_offsets [MONO_AOT_TRAMP_STATIC_RGCTX] = 16;
  	acfg->tramp_page_code_offsets [MONO_AOT_TRAMP_IMT_THUNK] = 72;
  	acfg->tramp_page_code_offsets [MONO_AOT_TRAMP_GSHAREDVT_ARG] = 16;
  #elif defined(TARGET_ARM64)
  	arm64_emit_specific_trampoline_pages (acfg);
  #endif
  }
  
  /*
   * arch_emit_specific_trampoline:
   *
   *   Emit code for a specific trampoline. OFFSET is the offset of the first of
   * two GOT slots which contain the generic trampoline address and the trampoline
   * argument. TRAMP_SIZE is set to the size of the emitted trampoline.
   */
  static void
  arch_emit_specific_trampoline (MonoAotCompile *acfg, int offset, int *tramp_size)
  {
  	/*
  	 * The trampolines created here are variations of the specific 
  	 * trampolines created in mono_arch_create_specific_trampoline (). The 
  	 * differences are:
  	 * - the generic trampoline address is taken from a got slot.
  	 * - the offset of the got slot where the trampoline argument is stored
  	 *   is embedded in the instruction stream, and the generic trampoline
  	 *   can load the argument by loading the offset, adding it to the
  	 *   address of the trampoline to get the address of the got slot, and
  	 *   loading the argument from there.
  	 * - all the trampolines should be of the same length.
  	 */
  #if defined(TARGET_AMD64)
  #if defined(__default_codegen__)
  	/* This should be exactly 16 bytes long */
  	*tramp_size = 16;
  	/* call *<offset>(%rip) */
  	emit_byte (acfg, '\x41');
  	emit_byte (acfg, '\xff');
  	emit_byte (acfg, '\x15');
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) - 4);
  	/* This should be relative to the start of the trampoline */
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", ((offset+1) * sizeof (gpointer)) + 7);
  	emit_zero_bytes (acfg, 5);
  #elif defined(__native_client_codegen__)
  	guint8 buf [256];
  	guint8 *buf_aligned = ALIGN_TO(buf, kNaClAlignment);
  	guint8 *code = buf_aligned;
  	guint8 *call_start;
  	size_t call_len;
  	int got_offset;
  
  	/* Emit this call in 'code' so we can find out how long it is. */
  	amd64_call_reg (code, AMD64_R11);
  	call_start = mono_arch_nacl_skip_nops (buf_aligned);
  	call_len = code - call_start;
  
  	/* The tramp_size is twice the NaCl alignment because it starts with */ 
  	/* a call which needs to be aligned to the end of the boundary.      */
  	*tramp_size = kNaClAlignment*2;
  	{
  		/* Emit nops to align call site below which is 7 bytes plus */
  		/* the length of the call sequence emitted above.           */
  		/* Note: this requires the specific trampoline starts on a  */
  		/* kNaclAlignedment aligned address, which it does because  */
  		/* it's its own function that is aligned.                   */
  		guint8 nop_buf[256];
  		guint8 *nopbuf_aligned = ALIGN_TO (nop_buf, kNaClAlignment);
  		guint8 *nopbuf_end = mono_arch_nacl_pad (nopbuf_aligned, kNaClAlignment - 7 - (call_len));
  		emit_bytes (acfg, nopbuf_aligned, nopbuf_end - nopbuf_aligned);
  	}
  	/* The trampoline is stored at the offset'th pointer, the -4 is  */
  	/* present because RIP relative addressing starts at the end of  */
  	/* the current instruction, while the label "." is relative to   */
  	/* the beginning of the current asm location, which in this case */
  	/* is not the mov instruction, but the offset itself, due to the */
  	/* way the bytes and ints are emitted here.                      */
  	got_offset = (offset * sizeof(gpointer)) - 4;
  
  	/* mov <OFFSET>(%rip), %r11d */
  	emit_byte (acfg, '\x45');
  	emit_byte (acfg, '\x8b');
  	emit_byte (acfg, '\x1d');
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", got_offset);
  
  	/* naclcall %r11 */
  	emit_bytes (acfg, call_start, call_len);
  
  	/* The arg is stored at the offset+1 pointer, relative to beginning */
  	/* of trampoline: 7 for mov, plus the call length, and 1 for push.  */
  	got_offset = ((offset + 1) * sizeof(gpointer)) + 7 + call_len + 1;
  
  	/* We can't emit this data directly, hide in a "push imm32" */
  	emit_byte (acfg, '\x68'); /* push */
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", got_offset);
  	emit_alignment (acfg, kNaClAlignment);
  #endif /*__native_client_codegen__*/
  #elif defined(TARGET_ARM)
  	guint8 buf [128];
  	guint8 *code;
  
  	/* This should be exactly 20 bytes long */
  	*tramp_size = 20;
  	code = buf;
  	ARM_PUSH (code, 0x5fff);
  	ARM_LDR_IMM (code, ARMREG_R1, ARMREG_PC, 4);
  	/* Load the value from the GOT */
  	ARM_LDR_REG_REG (code, ARMREG_R1, ARMREG_PC, ARMREG_R1);
  	/* Branch to it */
  	ARM_BLX_REG (code, ARMREG_R1);
  
  	g_assert (code - buf == 16);
  
  	/* Emit it */
  	emit_bytes (acfg, buf, code - buf);
  	/* 
  	 * Only one offset is needed, since the second one would be equal to the
  	 * first one.
  	 */
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) - 4 + 4);
  	//emit_symbol_diff (acfg, acfg->got_symbol, ".", ((offset + 1) * sizeof (gpointer)) - 4 + 8);
  #elif defined(TARGET_ARM64)
  	arm64_emit_specific_trampoline (acfg, offset, tramp_size);
  #elif defined(TARGET_POWERPC)
  	guint8 buf [128];
  	guint8 *code;
  
  	*tramp_size = 4;
  	code = buf;
  
  	g_assert (!acfg->use_bin_writer);
  
  	/*
  	 * PPC has no ip relative addressing, so we need to compute the address
  	 * of the mscorlib got. That is slow and complex, so instead, we store it
  	 * in the second got slot of every aot image. The caller already computed
  	 * the address of its got and placed it into r30.
  	 */
  	emit_unset_mode (acfg);
  	/* Load mscorlib got address */
  	fprintf (acfg->fp, "%s 0, %d(30)\n", PPC_LD_OP, (int)sizeof (gpointer));
  	/* Load generic trampoline address */
  	fprintf (acfg->fp, "lis 11, %d@h\n", (int)(offset * sizeof (gpointer)));
  	fprintf (acfg->fp, "ori 11, 11, %d@l\n", (int)(offset * sizeof (gpointer)));
  	fprintf (acfg->fp, "%s 11, 11, 0\n", PPC_LDX_OP);
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  	fprintf (acfg->fp, "%s 11, 0(11)\n", PPC_LD_OP);
  #endif
  	fprintf (acfg->fp, "mtctr 11\n");
  	/* Load trampoline argument */
  	/* On ppc, we pass it normally to the generic trampoline */
  	fprintf (acfg->fp, "lis 11, %d@h\n", (int)((offset + 1) * sizeof (gpointer)));
  	fprintf (acfg->fp, "ori 11, 11, %d@l\n", (int)((offset + 1) * sizeof (gpointer)));
  	fprintf (acfg->fp, "%s 0, 11, 0\n", PPC_LDX_OP);
  	/* Branch to generic trampoline */
  	fprintf (acfg->fp, "bctr\n");
  
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  	*tramp_size = 10 * 4;
  #else
  	*tramp_size = 9 * 4;
  #endif
  #elif defined(TARGET_X86)
  	guint8 buf [128];
  	guint8 *code;
  
  	/* Similar to the PPC code above */
  
  	/* FIXME: Could this clobber the register needed by get_vcall_slot () ? */
  
  	/* We clobber ECX, since EAX is used as MONO_ARCH_MONITOR_OBJECT_REG */
  #ifdef MONO_ARCH_MONITOR_OBJECT_REG
  	g_assert (MONO_ARCH_MONITOR_OBJECT_REG != X86_ECX);
  #endif
  
  	code = buf;
  	/* Load mscorlib got address */
  	x86_mov_reg_membase (code, X86_ECX, MONO_ARCH_GOT_REG, sizeof (gpointer), 4);
  	/* Push trampoline argument */
  	x86_push_membase (code, X86_ECX, (offset + 1) * sizeof (gpointer));
  	/* Load generic trampoline address */
  	x86_mov_reg_membase (code, X86_ECX, X86_ECX, offset * sizeof (gpointer), 4);
  	/* Branch to generic trampoline */
  	x86_jump_reg (code, X86_ECX);
  
  #ifdef __native_client_codegen__
  	{
  		/* emit nops to next 32 byte alignment */
  		int a = (~kNaClAlignmentMask) & ((code - buf) + kNaClAlignment - 1);
  		while (code < (buf + a)) x86_nop(code);
  	}
  #endif
  	emit_bytes (acfg, buf, code - buf);
  
  	*tramp_size = NACL_SIZE(17, kNaClAlignment);
  	g_assert (code - buf == *tramp_size);
  #else
  	g_assert_not_reached ();
  #endif
  }
  
  /*
   * arch_emit_unbox_trampoline:
   *
   *   Emit code for the unbox trampoline for METHOD used in the full-aot case.
   * CALL_TARGET is the symbol pointing to the native code of METHOD.
   */
  static void
  arch_emit_unbox_trampoline (MonoAotCompile *acfg, MonoCompile *cfg, MonoMethod *method, const char *call_target)
  {
  #if defined(TARGET_AMD64)
  	guint8 buf [32];
  	guint8 *code;
  	int this_reg;
  
  	this_reg = mono_arch_get_this_arg_reg (NULL);
  	code = buf;
  	amd64_alu_reg_imm (code, X86_ADD, this_reg, sizeof (MonoObject));
  
  	emit_bytes (acfg, buf, code - buf);
  	/* jump <method> */
  	emit_byte (acfg, '\xe9');
  	emit_symbol_diff (acfg, call_target, ".", -4);
  #elif defined(TARGET_X86)
  	guint8 buf [32];
  	guint8 *code;
  	int this_pos = 4;
  
  	code = buf;
  
  	x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
  
  	emit_bytes (acfg, buf, code - buf);
  
  	/* jump <method> */
  	emit_byte (acfg, '\xe9');
  	emit_symbol_diff (acfg, call_target, ".", -4);
  #elif defined(TARGET_ARM)
  	guint8 buf [128];
  	guint8 *code;
  
  	if (acfg->thumb_mixed && cfg->compile_llvm) {
  		fprintf (acfg->fp, "add r0, r0, #%d\n", (int)sizeof (MonoObject));
  		fprintf (acfg->fp, "b %s\n", call_target);
  		fprintf (acfg->fp, ".arm\n");
  		fprintf (acfg->fp, ".align 2\n");
  		return;
  	}
  
  	code = buf;
  
  	ARM_ADD_REG_IMM8 (code, ARMREG_R0, ARMREG_R0, sizeof (MonoObject));
  
  	emit_bytes (acfg, buf, code - buf);
  	/* jump to method */
  	if (acfg->use_bin_writer) {
  		guint8 buf [4];
  		guint8 *code;
  
  		code = buf;
  		ARM_B (code, 0);
  
  		img_writer_emit_reloc (acfg->w, R_ARM_JUMP24, call_target, -8);
  		emit_bytes (acfg, buf, 4);
  	} else {
  		if (acfg->thumb_mixed && cfg->compile_llvm)
  			fprintf (acfg->fp, "\n\tbx %s\n", call_target);
  		else
  			fprintf (acfg->fp, "\n\tb %s\n", call_target);
  	}
  #elif defined(TARGET_ARM64)
  	arm64_emit_unbox_trampoline (acfg, cfg, method, call_target);
  #elif defined(TARGET_POWERPC)
  	int this_pos = 3;
  
  	g_assert (!acfg->use_bin_writer);
  
  	fprintf (acfg->fp, "\n\taddi %d, %d, %d\n", this_pos, this_pos, (int)sizeof (MonoObject));
  	fprintf (acfg->fp, "\n\tb %s\n", call_target);
  #else
  	g_assert_not_reached ();
  #endif
  }
  
  /*
   * arch_emit_static_rgctx_trampoline:
   *
   *   Emit code for a static rgctx trampoline. OFFSET is the offset of the first of
   * two GOT slots which contain the rgctx argument, and the method to jump to.
   * TRAMP_SIZE is set to the size of the emitted trampoline.
   * These kinds of trampolines cannot be enumerated statically, since there could
   * be one trampoline per method instantiation, so we emit the same code for all
   * trampolines, and parameterize them using two GOT slots.
   */
  static void
  arch_emit_static_rgctx_trampoline (MonoAotCompile *acfg, int offset, int *tramp_size)
  {
  #if defined(TARGET_AMD64)
  #if defined(__default_codegen__)
  	/* This should be exactly 13 bytes long */
  	*tramp_size = 13;
  
  	/* mov <OFFSET>(%rip), %r10 */
  	emit_byte (acfg, '\x4d');
  	emit_byte (acfg, '\x8b');
  	emit_byte (acfg, '\x15');
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) - 4);
  
  	/* jmp *<offset>(%rip) */
  	emit_byte (acfg, '\xff');
  	emit_byte (acfg, '\x25');
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", ((offset + 1) * sizeof (gpointer)) - 4);
  #elif defined(__native_client_codegen__)
  	guint8 buf [128];
  	guint8 *buf_aligned = ALIGN_TO(buf, kNaClAlignment);
  	guint8 *code = buf_aligned;
  
  	/* mov <OFFSET>(%rip), %r10d */
  	emit_byte (acfg, '\x45');
  	emit_byte (acfg, '\x8b');
  	emit_byte (acfg, '\x15');
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) - 4);
  
  	/* mov <OFFSET>(%rip), %r11d */
  	emit_byte (acfg, '\x45');
  	emit_byte (acfg, '\x8b');
  	emit_byte (acfg, '\x1d');
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", ((offset + 1) * sizeof (gpointer)) - 4);
  
  	/* nacljmp *%r11 */
  	amd64_jump_reg (code, AMD64_R11);
  	emit_bytes (acfg, buf_aligned, code - buf_aligned);
  
  	emit_alignment (acfg, kNaClAlignment);
  	*tramp_size = kNaClAlignment;
  #endif /*__native_client_codegen__*/
  
  #elif defined(TARGET_ARM)
  	guint8 buf [128];
  	guint8 *code;
  
  	/* This should be exactly 24 bytes long */
  	*tramp_size = 24;
  	code = buf;
  	/* Load rgctx value */
  	ARM_LDR_IMM (code, ARMREG_IP, ARMREG_PC, 8);
  	ARM_LDR_REG_REG (code, MONO_ARCH_RGCTX_REG, ARMREG_PC, ARMREG_IP);
  	/* Load branch addr + branch */
  	ARM_LDR_IMM (code, ARMREG_IP, ARMREG_PC, 4);
  	ARM_LDR_REG_REG (code, ARMREG_PC, ARMREG_PC, ARMREG_IP);
  
  	g_assert (code - buf == 16);
  
  	/* Emit it */
  	emit_bytes (acfg, buf, code - buf);
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) - 4 + 8);
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", ((offset + 1) * sizeof (gpointer)) - 4 + 4);
  #elif defined(TARGET_ARM64)
  	arm64_emit_static_rgctx_trampoline (acfg, offset, tramp_size);
  #elif defined(TARGET_POWERPC)
  	guint8 buf [128];
  	guint8 *code;
  
  	*tramp_size = 4;
  	code = buf;
  
  	g_assert (!acfg->use_bin_writer);
  
  	/*
  	 * PPC has no ip relative addressing, so we need to compute the address
  	 * of the mscorlib got. That is slow and complex, so instead, we store it
  	 * in the second got slot of every aot image. The caller already computed
  	 * the address of its got and placed it into r30.
  	 */
  	emit_unset_mode (acfg);
  	/* Load mscorlib got address */
  	fprintf (acfg->fp, "%s 0, %d(30)\n", PPC_LD_OP, (int)sizeof (gpointer));
  	/* Load rgctx */
  	fprintf (acfg->fp, "lis 11, %d@h\n", (int)(offset * sizeof (gpointer)));
  	fprintf (acfg->fp, "ori 11, 11, %d@l\n", (int)(offset * sizeof (gpointer)));
  	fprintf (acfg->fp, "%s %d, 11, 0\n", PPC_LDX_OP, MONO_ARCH_RGCTX_REG);
  	/* Load target address */
  	fprintf (acfg->fp, "lis 11, %d@h\n", (int)((offset + 1) * sizeof (gpointer)));
  	fprintf (acfg->fp, "ori 11, 11, %d@l\n", (int)((offset + 1) * sizeof (gpointer)));
  	fprintf (acfg->fp, "%s 11, 11, 0\n", PPC_LDX_OP);
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  	fprintf (acfg->fp, "%s 2, %d(11)\n", PPC_LD_OP, (int)sizeof (gpointer));
  	fprintf (acfg->fp, "%s 11, 0(11)\n", PPC_LD_OP);
  #endif
  	fprintf (acfg->fp, "mtctr 11\n");
  	/* Branch to the target address */
  	fprintf (acfg->fp, "bctr\n");
  
  #ifdef PPC_USES_FUNCTION_DESCRIPTOR
  	*tramp_size = 11 * 4;
  #else
  	*tramp_size = 9 * 4;
  #endif
  
  #elif defined(TARGET_X86)
  	guint8 buf [128];
  	guint8 *code;
  
  	/* Similar to the PPC code above */
  
  	g_assert (MONO_ARCH_RGCTX_REG != X86_ECX);
  
  	code = buf;
  	/* Load mscorlib got address */
  	x86_mov_reg_membase (code, X86_ECX, MONO_ARCH_GOT_REG, sizeof (gpointer), 4);
  	/* Load arg */
  	x86_mov_reg_membase (code, MONO_ARCH_RGCTX_REG, X86_ECX, offset * sizeof (gpointer), 4);
  	/* Branch to the target address */
  	x86_jump_membase (code, X86_ECX, (offset + 1) * sizeof (gpointer));
  
  #ifdef __native_client_codegen__
  	{
  		/* emit nops to next 32 byte alignment */
  		int a = (~kNaClAlignmentMask) & ((code - buf) + kNaClAlignment - 1);
  		while (code < (buf + a)) x86_nop(code);
  	}
  #endif
  
  	emit_bytes (acfg, buf, code - buf);
  
  	*tramp_size = NACL_SIZE (15, kNaClAlignment);
  	g_assert (code - buf == *tramp_size);
  #else
  	g_assert_not_reached ();
  #endif
  }	
  
  /*
   * arch_emit_imt_thunk:
   *
   *   Emit an IMT thunk usable in full-aot mode. The thunk uses 1 got slot which
   * points to an array of pointer pairs. The pairs of the form [key, ptr], where
   * key is the IMT key, and ptr holds the address of a memory location holding
   * the address to branch to if the IMT arg matches the key. The array is 
   * terminated by a pair whose key is NULL, and whose ptr is the address of the 
   * fail_tramp.
   * TRAMP_SIZE is set to the size of the emitted trampoline.
   */
  static void
  arch_emit_imt_thunk (MonoAotCompile *acfg, int offset, int *tramp_size)
  {
  #if defined(TARGET_AMD64)
  	guint8 *buf, *code;
  #if defined(__native_client_codegen__)
  	guint8 *buf_alloc;
  #endif
  	guint8 *labels [16];
  	guint8 mov_buf[3];
  	guint8 *mov_buf_ptr = mov_buf;
  
  	const int kSizeOfMove = 7;
  #if defined(__default_codegen__)
  	code = buf = g_malloc (256);
  #elif defined(__native_client_codegen__)
  	buf_alloc = g_malloc (256 + kNaClAlignment + kSizeOfMove);
  	buf = ((guint)buf_alloc + kNaClAlignment) & ~kNaClAlignmentMask;
  	/* The RIP relative move below is emitted first */
  	buf += kSizeOfMove;
  	code = buf;
  #endif
  
  	/* FIXME: Optimize this, i.e. use binary search etc. */
  	/* Maybe move the body into a separate function (slower, but much smaller) */
  
  	/* MONO_ARCH_IMT_SCRATCH_REG is a free register */
  
  	labels [0] = code;
  	amd64_alu_membase_imm (code, X86_CMP, MONO_ARCH_IMT_SCRATCH_REG, 0, 0);
  	labels [1] = code;
  	amd64_branch8 (code, X86_CC_Z, 0, FALSE);
  
  	/* Check key */
  	amd64_alu_membase_reg_size (code, X86_CMP, MONO_ARCH_IMT_SCRATCH_REG, 0, MONO_ARCH_IMT_REG, sizeof (gpointer));
  	labels [2] = code;
  	amd64_branch8 (code, X86_CC_Z, 0, FALSE);
  
  	/* Loop footer */
  	amd64_alu_reg_imm (code, X86_ADD, MONO_ARCH_IMT_SCRATCH_REG, 2 * sizeof (gpointer));
  	amd64_jump_code (code, labels [0]);
  
  	/* Match */
  	mono_amd64_patch (labels [2], code);
  	amd64_mov_reg_membase (code, MONO_ARCH_IMT_SCRATCH_REG, MONO_ARCH_IMT_SCRATCH_REG, sizeof (gpointer), sizeof (gpointer));
  	amd64_jump_membase (code, MONO_ARCH_IMT_SCRATCH_REG, 0);
  
  	/* No match */
  	mono_amd64_patch (labels [1], code);
  	/* Load fail tramp */
  	amd64_alu_reg_imm (code, X86_ADD, MONO_ARCH_IMT_SCRATCH_REG, sizeof (gpointer));
  	/* Check if there is a fail tramp */
  	amd64_alu_membase_imm (code, X86_CMP, MONO_ARCH_IMT_SCRATCH_REG, 0, 0);
  	labels [3] = code;
  	amd64_branch8 (code, X86_CC_Z, 0, FALSE);
  	/* Jump to fail tramp */
  	amd64_jump_membase (code, MONO_ARCH_IMT_SCRATCH_REG, 0);
  
  	/* Fail */
  	mono_amd64_patch (labels [3], code);
  	x86_breakpoint (code);
  
  	/* mov <OFFSET>(%rip), MONO_ARCH_IMT_SCRATCH_REG */
  	amd64_emit_rex (mov_buf_ptr, sizeof(gpointer), MONO_ARCH_IMT_SCRATCH_REG, 0, AMD64_RIP);
  	*(mov_buf_ptr)++ = (unsigned char)0x8b; /* mov opcode */
  	x86_address_byte (mov_buf_ptr, 0, MONO_ARCH_IMT_SCRATCH_REG & 0x7, 5);
  	emit_bytes (acfg, mov_buf, mov_buf_ptr - mov_buf);
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) - 4);
  
  	emit_bytes (acfg, buf, code - buf);
  	
  	*tramp_size = code - buf + kSizeOfMove;
  #if defined(__native_client_codegen__)
  	/* The tramp will be padded to the next kNaClAlignment bundle. */
  	*tramp_size = ALIGN_TO ((*tramp_size), kNaClAlignment);
  #endif
  
  #if defined(__default_codegen__)
  	g_free (buf);
  #elif defined(__native_client_codegen__)
  	g_free (buf_alloc); 
  #endif
  
  #elif defined(TARGET_X86)
  	guint8 *buf, *code;
  #ifdef __native_client_codegen__
  	guint8 *buf_alloc;
  #endif
  	guint8 *labels [16];
  
  #if defined(__default_codegen__)
  	code = buf = g_malloc (256);
  #elif defined(__native_client_codegen__)
  	buf_alloc = g_malloc (256 + kNaClAlignment);
  	code = buf = ((guint)buf_alloc + kNaClAlignment) & ~kNaClAlignmentMask;
  #endif
  
  	/* Allocate a temporary stack slot */
  	x86_push_reg (code, X86_EAX);
  	/* Save EAX */
  	x86_push_reg (code, X86_EAX);
  
  	/* Load mscorlib got address */
  	x86_mov_reg_membase (code, X86_EAX, MONO_ARCH_GOT_REG, sizeof (gpointer), 4);
  	/* Load arg */
  	x86_mov_reg_membase (code, X86_EAX, X86_EAX, offset * sizeof (gpointer), 4);
  
  	labels [0] = code;
  	x86_alu_membase_imm (code, X86_CMP, X86_EAX, 0, 0);
  	labels [1] = code;
  	x86_branch8 (code, X86_CC_Z, FALSE, 0);
  
  	/* Check key */
  	x86_alu_membase_reg (code, X86_CMP, X86_EAX, 0, MONO_ARCH_IMT_REG);
  	labels [2] = code;
  	x86_branch8 (code, X86_CC_Z, FALSE, 0);
  
  	/* Loop footer */
  	x86_alu_reg_imm (code, X86_ADD, X86_EAX, 2 * sizeof (gpointer));
  	x86_jump_code (code, labels [0]);
  
  	/* Match */
  	mono_x86_patch (labels [2], code);
  	x86_mov_reg_membase (code, X86_EAX, X86_EAX, sizeof (gpointer), 4);
  	x86_mov_reg_membase (code, X86_EAX, X86_EAX, 0, 4);
  	/* Save the target address to the temporary stack location */
  	x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
  	/* Restore EAX */
  	x86_pop_reg (code, X86_EAX);
  	/* Jump to the target address */
  	x86_ret (code);
  
  	/* No match */
  	mono_x86_patch (labels [1], code);
  	/* Load fail tramp */
  	x86_mov_reg_membase (code, X86_EAX, X86_EAX, sizeof (gpointer), 4);
  	x86_alu_membase_imm (code, X86_CMP, X86_EAX, 0, 0);
  	labels [3] = code;
  	x86_branch8 (code, X86_CC_Z, FALSE, 0);
  	/* Jump to fail tramp */
  	x86_mov_membase_reg (code, X86_ESP, 4, X86_EAX, 4);
  	x86_pop_reg (code, X86_EAX);
  	x86_ret (code);
  
  	/* Fail */
  	mono_x86_patch (labels [3], code);
  	x86_breakpoint (code);
  
  #ifdef __native_client_codegen__
  	{
  		/* emit nops to next 32 byte alignment */
  		int a = (~kNaClAlignmentMask) & ((code - buf) + kNaClAlignment - 1);
  		while (code < (buf + a)) x86_nop(code);
  	}
  #endif
  	emit_bytes (acfg, buf, code - buf);
  	
  	*tramp_size = code - buf;
  
  #if defined(__default_codegen__)
  	g_free (buf);
  #elif defined(__native_client_codegen__)
  	g_free (buf_alloc); 
  #endif
  
  #elif defined(TARGET_ARM)
  	guint8 buf [128];
  	guint8 *code, *code2, *labels [16];
  
  	code = buf;
  
  	/* The IMT method is in v5 */
  
  	/* Need at least two free registers, plus a slot for storing the pc */
  	ARM_PUSH (code, (1 << ARMREG_R0)|(1 << ARMREG_R1)|(1 << ARMREG_R2));
  	labels [0] = code;
  	/* Load the parameter from the GOT */
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_PC, 0);
  	ARM_LDR_REG_REG (code, ARMREG_R0, ARMREG_PC, ARMREG_R0);
  
  	labels [1] = code;
  	ARM_LDR_IMM (code, ARMREG_R1, ARMREG_R0, 0);
  	ARM_CMP_REG_REG (code, ARMREG_R1, ARMREG_V5);
  	labels [2] = code;
  	ARM_B_COND (code, ARMCOND_EQ, 0);
  
  	/* End-of-loop check */
  	ARM_CMP_REG_IMM (code, ARMREG_R1, 0, 0);
  	labels [3] = code;
  	ARM_B_COND (code, ARMCOND_EQ, 0);
  
  	/* Loop footer */
  	ARM_ADD_REG_IMM8 (code, ARMREG_R0, ARMREG_R0, sizeof (gpointer) * 2);
  	labels [4] = code;
  	ARM_B (code, 0);
  	arm_patch (labels [4], labels [1]);
  
  	/* Match */
  	arm_patch (labels [2], code);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_R0, 4);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_R0, 0);
  	/* Save it to the third stack slot */
  	ARM_STR_IMM (code, ARMREG_R0, ARMREG_SP, 8);
  	/* Restore the registers and branch */
  	ARM_POP (code, (1 << ARMREG_R0)|(1 << ARMREG_R1)|(1 << ARMREG_PC));
  
  	/* No match */
  	arm_patch (labels [3], code);
  	ARM_LDR_IMM (code, ARMREG_R0, ARMREG_R0, 4);
  	ARM_STR_IMM (code, ARMREG_R0, ARMREG_SP, 8);
  	ARM_POP (code, (1 << ARMREG_R0)|(1 << ARMREG_R1)|(1 << ARMREG_PC));
  
  	/* Fixup offset */
  	code2 = labels [0];
  	ARM_LDR_IMM (code2, ARMREG_R0, ARMREG_PC, (code - (labels [0] + 8)));
  
  	emit_bytes (acfg, buf, code - buf);
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) + (code - (labels [0] + 8)) - 4);
  
  	*tramp_size = code - buf + 4;
  #elif defined(TARGET_ARM64)
  	arm64_emit_imt_thunk (acfg, offset, tramp_size);
  #elif defined(TARGET_POWERPC)
  	guint8 buf [128];
  	guint8 *code, *labels [16];
  
  	code = buf;
  
  	/* Load the mscorlib got address */
  	ppc_ldptr (code, ppc_r11, sizeof (gpointer), ppc_r30);
  	/* Load the parameter from the GOT */
  	ppc_load (code, ppc_r0, offset * sizeof (gpointer));
  	ppc_ldptr_indexed (code, ppc_r11, ppc_r11, ppc_r0);
  
  	/* Load and check key */
  	labels [1] = code;
  	ppc_ldptr (code, ppc_r0, 0, ppc_r11);
  	ppc_cmp (code, 0, sizeof (gpointer) == 8 ? 1 : 0, ppc_r0, MONO_ARCH_IMT_REG);
  	labels [2] = code;
  	ppc_bc (code, PPC_BR_TRUE, PPC_BR_EQ, 0);
  
  	/* End-of-loop check */
  	ppc_cmpi (code, 0, sizeof (gpointer) == 8 ? 1 : 0, ppc_r0, 0);
  	labels [3] = code;
  	ppc_bc (code, PPC_BR_TRUE, PPC_BR_EQ, 0);
  
  	/* Loop footer */
  	ppc_addi (code, ppc_r11, ppc_r11, 2 * sizeof (gpointer));
  	labels [4] = code;
  	ppc_b (code, 0);
  	mono_ppc_patch (labels [4], labels [1]);
  
  	/* Match */
  	mono_ppc_patch (labels [2], code);
  	ppc_ldptr (code, ppc_r11, sizeof (gpointer), ppc_r11);
  	/* r11 now contains the value of the vtable slot */
  	/* this is not a function descriptor on ppc64 */
  	ppc_ldptr (code, ppc_r11, 0, ppc_r11);
  	ppc_mtctr (code, ppc_r11);
  	ppc_bcctr (code, PPC_BR_ALWAYS, 0);
  
  	/* Fail */
  	mono_ppc_patch (labels [3], code);
  	/* FIXME: */
  	ppc_break (code);
  
  	*tramp_size = code - buf;
  
  	emit_bytes (acfg, buf, code - buf);
  #else
  	g_assert_not_reached ();
  #endif
  }
  
  /*
   * arch_emit_gsharedvt_arg_trampoline:
   *
   *   Emit code for a gsharedvt arg trampoline. OFFSET is the offset of the first of
   * two GOT slots which contain the argument, and the code to jump to.
   * TRAMP_SIZE is set to the size of the emitted trampoline.
   * These kinds of trampolines cannot be enumerated statically, since there could
   * be one trampoline per method instantiation, so we emit the same code for all
   * trampolines, and parameterize them using two GOT slots.
   */
  static void
  arch_emit_gsharedvt_arg_trampoline (MonoAotCompile *acfg, int offset, int *tramp_size)
  {
  #if defined(TARGET_X86)
  	guint8 buf [128];
  	guint8 *code;
  
  	/* Similar to the PPC code above */
  
  	g_assert (MONO_ARCH_RGCTX_REG != X86_ECX);
  
  	code = buf;
  	/* Load mscorlib got address */
  	x86_mov_reg_membase (code, X86_ECX, MONO_ARCH_GOT_REG, sizeof (gpointer), 4);
  	/* Load arg */
  	x86_mov_reg_membase (code, X86_EAX, X86_ECX, offset * sizeof (gpointer), 4);
  	/* Branch to the target address */
  	x86_jump_membase (code, X86_ECX, (offset + 1) * sizeof (gpointer));
  
  #ifdef __native_client_codegen__
  	{
  		/* emit nops to next 32 byte alignment */
  		int a = (~kNaClAlignmentMask) & ((code - buf) + kNaClAlignment - 1);
  		while (code < (buf + a)) x86_nop(code);
  	}
  #endif
  
  	emit_bytes (acfg, buf, code - buf);
  
  	*tramp_size = NACL_SIZE (15, kNaClAlignment);
  	g_assert (code - buf == *tramp_size);
  #elif defined(TARGET_ARM)
  	guint8 buf [128];
  	guint8 *code;
  
  	/* The same as mono_arch_get_gsharedvt_arg_trampoline (), but for AOT */
  	/* Similar to arch_emit_specific_trampoline () */
  	*tramp_size = 24;
  	code = buf;
  	ARM_PUSH (code, (1 << ARMREG_R0) | (1 << ARMREG_R1) | (1 << ARMREG_R2) | (1 << ARMREG_R3));
  	ARM_LDR_IMM (code, ARMREG_R1, ARMREG_PC, 8);
  	/* Load the arg value from the GOT */
  	ARM_LDR_REG_REG (code, ARMREG_R0, ARMREG_PC, ARMREG_R1);
  	/* Load the addr from the GOT */
  	ARM_LDR_REG_REG (code, ARMREG_R1, ARMREG_PC, ARMREG_R1);
  	/* Branch to it */
  	ARM_BX (code, ARMREG_R1);
  
  	g_assert (code - buf == 20);
  
  	/* Emit it */
  	emit_bytes (acfg, buf, code - buf);
  	emit_symbol_diff (acfg, acfg->got_symbol, ".", (offset * sizeof (gpointer)) + 4);
  #elif defined(TARGET_ARM64)
  	arm64_emit_gsharedvt_arg_trampoline (acfg, offset, tramp_size);
  #else
  	g_assert_not_reached ();
  #endif
  }	
  
  static void
  arch_emit_autoreg (MonoAotCompile *acfg, char *symbol)
  {
  #if defined(TARGET_POWERPC) && defined(__mono_ilp32__)
  	/* Based on code generated by gcc */
  	emit_unset_mode (acfg);
  
  	fprintf (acfg->fp,
  #if defined(_MSC_VER) || defined(MONO_CROSS_COMPILE) 
  			 ".section	.ctors,\"aw\",@progbits\n"
  			 ".align 2\n"
  			 ".globl	%s\n"
  			 ".long	%s\n"
  			 ".section	.opd,\"aw\"\n"
  			 ".align 2\n"
  			 "%s:\n"
  			 ".long	.%s,.TOC.@tocbase32\n"
  			 ".size	%s,.-%s\n"
  			 ".section .text\n"
  			 ".type	.%s,@function\n"
  			 ".align 2\n"
  			 ".%s:\n", symbol, symbol, symbol, symbol, symbol, symbol, symbol, symbol);
  #else
  			 ".section	.ctors,\"aw\",@progbits\n"
  			 ".align 2\n"
  			 ".globl	%1$s\n"
  			 ".long	%1$s\n"
  			 ".section	.opd,\"aw\"\n"
  			 ".align 2\n"
  			 "%1$s:\n"
  			 ".long	.%1$s,.TOC.@tocbase32\n"
  			 ".size	%1$s,.-%1$s\n"
  			 ".section .text\n"
  			 ".type	.%1$s,@function\n"
  			 ".align 2\n"
  			 ".%1$s:\n", symbol);
  #endif
  
  
  	fprintf (acfg->fp,
  			 "stdu 1,-128(1)\n"
  			 "mflr 0\n"
  			 "std 31,120(1)\n"
  			 "std 0,144(1)\n"
  
  			 ".Lautoreg:\n"
  			 "lis 3, .Lglobals@h\n"
  			 "ori 3, 3, .Lglobals@l\n"
  			 "bl .mono_aot_register_module\n"
  			 "ld 11,0(1)\n"
  			 "ld 0,16(11)\n"
  			 "mtlr 0\n"
  			 "ld 31,-8(11)\n"
  			 "mr 1,11\n"
  			 "blr\n"
  			 );
  #if defined(_MSC_VER) || defined(MONO_CROSS_COMPILE) 
  		fprintf (acfg->fp,
  			 ".size	.%s,.-.%s\n", symbol, symbol);
  #else
  	fprintf (acfg->fp,
  			 ".size	.%1$s,.-.%1$s\n", symbol);
  #endif
  #else
  #endif
  }
  
  /* END OF ARCH SPECIFIC CODE */
  
  static guint32
  mono_get_field_token (MonoClassField *field) 
  {
  	MonoClass *klass = field->parent;
  	int i;
  
  	for (i = 0; i < klass->field.count; ++i) {
  		if (field == &klass->fields [i])
  			return MONO_TOKEN_FIELD_DEF | (klass->field.first + 1 + i);
  	}
  
  	g_assert_not_reached ();
  	return 0;
  }
  
  static inline void
  encode_value (gint32 value, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  
  	//printf ("ENCODE: %d 0x%x.\n", value, value);
  
  	/* 
  	 * Same encoding as the one used in the metadata, extended to handle values
  	 * greater than 0x1fffffff.
  	 */
  	if ((value >= 0) && (value <= 127))
  		*p++ = value;
  	else if ((value >= 0) && (value <= 16383)) {
  		p [0] = 0x80 | (value >> 8);
  		p [1] = value & 0xff;
  		p += 2;
  	} else if ((value >= 0) && (value <= 0x1fffffff)) {
  		p [0] = (value >> 24) | 0xc0;
  		p [1] = (value >> 16) & 0xff;
  		p [2] = (value >> 8) & 0xff;
  		p [3] = value & 0xff;
  		p += 4;
  	}
  	else {
  		p [0] = 0xff;
  		p [1] = (value >> 24) & 0xff;
  		p [2] = (value >> 16) & 0xff;
  		p [3] = (value >> 8) & 0xff;
  		p [4] = value & 0xff;
  		p += 5;
  	}
  	if (endbuf)
  		*endbuf = p;
  }
  
  static void
  stream_init (MonoDynamicStream *sh)
  {
  	sh->index = 0;
  	sh->alloc_size = 4096;
  	sh->data = g_malloc (4096);
  
  	/* So offsets are > 0 */
  	sh->data [0] = 0;
  	sh->index ++;
  }
  
  static void
  make_room_in_stream (MonoDynamicStream *stream, int size)
  {
  	if (size <= stream->alloc_size)
  		return;
  	
  	while (stream->alloc_size <= size) {
  		if (stream->alloc_size < 4096)
  			stream->alloc_size = 4096;
  		else
  			stream->alloc_size *= 2;
  	}
  	
  	stream->data = g_realloc (stream->data, stream->alloc_size);
  }
  
  static guint32
  add_stream_data (MonoDynamicStream *stream, const char *data, guint32 len)
  {
  	guint32 idx;
  	
  	make_room_in_stream (stream, stream->index + len);
  	memcpy (stream->data + stream->index, data, len);
  	idx = stream->index;
  	stream->index += len;
  	return idx;
  }
  
  /*
   * add_to_blob:
   *
   *   Add data to the binary blob inside the aot image. Returns the offset inside the
   * blob where the data was stored.
   */
  static guint32
  add_to_blob (MonoAotCompile *acfg, const guint8 *data, guint32 data_len)
  {
  	if (acfg->blob.alloc_size == 0)
  		stream_init (&acfg->blob);
  
  	return add_stream_data (&acfg->blob, (char*)data, data_len);
  }
  
  static guint32
  add_to_blob_aligned (MonoAotCompile *acfg, const guint8 *data, guint32 data_len, guint32 align)
  {
  	char buf [4] = {0};
  	guint32 count;
  
  	if (acfg->blob.alloc_size == 0)
  		stream_init (&acfg->blob);
  
  	count = acfg->blob.index % align;
  
  	/* we assume the stream data will be aligned */
  	if (count)
  		add_stream_data (&acfg->blob, buf, 4 - count);
  
  	return add_stream_data (&acfg->blob, (char*)data, data_len);
  }
  
  /*
   * emit_offset_table:
   *
   *   Emit a table of increasing offsets in a compact form using differential encoding.
   * There is an index entry for each GROUP_SIZE number of entries. The greater the
   * group size, the more compact the table becomes, but the slower it becomes to compute
   * a given entry. Returns the size of the table.
   */
  static guint32
  emit_offset_table (MonoAotCompile *acfg, int noffsets, int group_size, gint32 *offsets)
  {
  	gint32 current_offset;
  	int i, buf_size, ngroups, index_entry_size;
  	guint8 *p, *buf;
  	guint32 *index_offsets;
  
  	ngroups = (noffsets + (group_size - 1)) / group_size;
  
  	index_offsets = g_new0 (guint32, ngroups);
  
  	buf_size = noffsets * 4;
  	p = buf = g_malloc0 (buf_size);
  
  	current_offset = 0;
  	for (i = 0; i < noffsets; ++i) {
  		//printf ("D: %d -> %d\n", i, offsets [i]);
  		if ((i % group_size) == 0) {
  			index_offsets [i / group_size] = p - buf;
  			/* Emit the full value for these entries */
  			encode_value (offsets [i], p, &p);
  		} else {
  			/* The offsets are allowed to be non-increasing */
  			//g_assert (offsets [i] >= current_offset);
  			encode_value (offsets [i] - current_offset, p, &p);
  		}
  		current_offset = offsets [i];
  	}
  
  	if (ngroups && index_offsets [ngroups - 1] < 65000)
  		index_entry_size = 2;
  	else
  		index_entry_size = 4;
  
  	/* Emit the header */
  	emit_int32 (acfg, noffsets);
  	emit_int32 (acfg, group_size);
  	emit_int32 (acfg, ngroups);
  	emit_int32 (acfg, index_entry_size);
  
  	/* Emit the index */
  	for (i = 0; i < ngroups; ++i) {
  		if (index_entry_size == 2)
  			emit_int16 (acfg, index_offsets [i]);
  		else
  			emit_int32 (acfg, index_offsets [i]);
  	}
  
  	/* Emit the data */
  	emit_bytes (acfg, buf, p - buf);
  
      return (int)(p - buf) + (ngroups * 4);
  }
  
  static guint32
  get_image_index (MonoAotCompile *cfg, MonoImage *image)
  {
  	guint32 index;
  
  	index = GPOINTER_TO_UINT (g_hash_table_lookup (cfg->image_hash, image));
  	if (index)
  		return index - 1;
  	else {
  		index = g_hash_table_size (cfg->image_hash);
  		g_hash_table_insert (cfg->image_hash, image, GUINT_TO_POINTER (index + 1));
  		g_ptr_array_add (cfg->image_table, image);
  		return index;
  	}
  }
  
  static guint32
  find_typespec_for_class (MonoAotCompile *acfg, MonoClass *klass)
  {
  	int i;
  	int len = acfg->image->tables [MONO_TABLE_TYPESPEC].rows;
  
  	/* FIXME: Search referenced images as well */
  	if (!acfg->typespec_classes) {
  		acfg->typespec_classes = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoClass*) * len);
  		for (i = 0; i < len; ++i) {
  			MonoError error;
  			acfg->typespec_classes [i] = mono_class_get_and_inflate_typespec_checked (acfg->image, MONO_TOKEN_TYPE_SPEC | (i + 1), NULL, &error);
  			g_assert (mono_error_ok (&error)); /* FIXME error handling */
  		}
  	}
  	for (i = 0; i < len; ++i) {
  		if (acfg->typespec_classes [i] == klass)
  			break;
  	}
  
  	if (i < len)
  		return MONO_TOKEN_TYPE_SPEC | (i + 1);
  	else
  		return 0;
  }
  
  static void
  encode_method_ref (MonoAotCompile *acfg, MonoMethod *method, guint8 *buf, guint8 **endbuf);
  
  static void
  encode_klass_ref (MonoAotCompile *acfg, MonoClass *klass, guint8 *buf, guint8 **endbuf);
  
  static void
  encode_ginst (MonoAotCompile *acfg, MonoGenericInst *inst, guint8 *buf, guint8 **endbuf);
  
  static void
  encode_type (MonoAotCompile *acfg, MonoType *t, guint8 *buf, guint8 **endbuf);
  
  static void
  encode_klass_ref_inner (MonoAotCompile *acfg, MonoClass *klass, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  
  	/*
  	 * The encoding begins with one of the MONO_AOT_TYPEREF values, followed by additional
  	 * information.
  	 */
  
  	if (klass->generic_class) {
  		guint32 token;
  		g_assert (klass->type_token);
  
  		/* Find a typespec for a class if possible */
  		token = find_typespec_for_class (acfg, klass);
  		if (token) {
  			encode_value (MONO_AOT_TYPEREF_TYPESPEC_TOKEN, p, &p);
  			encode_value (token, p, &p);
  		} else {
  			MonoClass *gclass = klass->generic_class->container_class;
  			MonoGenericInst *inst = klass->generic_class->context.class_inst;
  			static int count = 0;
  			guint8 *p1 = p;
  
  			encode_value (MONO_AOT_TYPEREF_GINST, p, &p);
  			encode_klass_ref (acfg, gclass, p, &p);
  			encode_ginst (acfg, inst, p, &p);
  
  			count += p - p1;
  		}
  	} else if (klass->type_token) {
  		int iindex = get_image_index (acfg, klass->image);
  
  		g_assert (mono_metadata_token_code (klass->type_token) == MONO_TOKEN_TYPE_DEF);
  		if (iindex == 0) {
  			encode_value (MONO_AOT_TYPEREF_TYPEDEF_INDEX, p, &p);
  			encode_value (klass->type_token - MONO_TOKEN_TYPE_DEF, p, &p);
  		} else {
  			encode_value (MONO_AOT_TYPEREF_TYPEDEF_INDEX_IMAGE, p, &p);
  			encode_value (klass->type_token - MONO_TOKEN_TYPE_DEF, p, &p);
  			encode_value (get_image_index (acfg, klass->image), p, &p);
  		}
  	} else if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR)) {
  		MonoGenericContainer *container = mono_type_get_generic_param_owner (&klass->byval_arg);
  		MonoGenericParam *par = klass->byval_arg.data.generic_param;
  
  		encode_value (MONO_AOT_TYPEREF_VAR, p, &p);
  		encode_value (klass->byval_arg.type, p, &p);
  		encode_value (mono_type_get_generic_param_num (&klass->byval_arg), p, &p);
  
  		encode_value (container ? 1 : 0, p, &p);
  		if (container) {
  			encode_value (container->is_method, p, &p);
  			g_assert (par->serial == 0);
  			if (container->is_method)
  				encode_method_ref (acfg, container->owner.method, p, &p);
  			else
  				encode_klass_ref (acfg, container->owner.klass, p, &p);
  		} else {
  			encode_value (par->serial, p, &p);
  		}
  	} else if (klass->byval_arg.type == MONO_TYPE_PTR) {
  		encode_value (MONO_AOT_TYPEREF_PTR, p, &p);
  		encode_type (acfg, &klass->byval_arg, p, &p);
  	} else {
  		/* Array class */
  		g_assert (klass->rank > 0);
  		encode_value (MONO_AOT_TYPEREF_ARRAY, p, &p);
  		encode_value (klass->rank, p, &p);
  		encode_klass_ref (acfg, klass->element_class, p, &p);
  	}
  	*endbuf = p;
  }
  
  /*
   * encode_klass_ref:
   *
   *   Encode a reference to KLASS. We use our home-grown encoding instead of the
   * standard metadata encoding.
   */
  static void
  encode_klass_ref (MonoAotCompile *acfg, MonoClass *klass, guint8 *buf, guint8 **endbuf)
  {
  	gboolean shared = FALSE;
  
  	/* 
  	 * The encoding of generic instances is large so emit them only once.
  	 */
  	if (klass->generic_class) {
  		guint32 token;
  		g_assert (klass->type_token);
  
  		/* Find a typespec for a class if possible */
  		token = find_typespec_for_class (acfg, klass);
  		if (!token)
  			shared = TRUE;
  	} else if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR)) {
  		shared = TRUE;
  	}
  
  	if (shared) {
  		guint offset = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->klass_blob_hash, klass));
  		guint8 *buf2, *p;
  
  		if (!offset) {
  			buf2 = g_malloc (1024);
  			p = buf2;
  
  			encode_klass_ref_inner (acfg, klass, p, &p);
  			g_assert (p - buf2 < 1024);
  
  			offset = add_to_blob (acfg, buf2, p - buf2);
  			g_free (buf2);
  
  			g_hash_table_insert (acfg->klass_blob_hash, klass, GUINT_TO_POINTER (offset + 1));
  		} else {
  			offset --;
  		}
  
  		p = buf;
  		encode_value (MONO_AOT_TYPEREF_BLOB_INDEX, p, &p);
  		encode_value (offset, p, &p);
  		*endbuf = p;
  		return;
  	}
  
  	encode_klass_ref_inner (acfg, klass, buf, endbuf);
  }
  
  static void
  encode_field_info (MonoAotCompile *cfg, MonoClassField *field, guint8 *buf, guint8 **endbuf)
  {
  	guint32 token = mono_get_field_token (field);
  	guint8 *p = buf;
  
  	encode_klass_ref (cfg, field->parent, p, &p);
  	g_assert (mono_metadata_token_code (token) == MONO_TOKEN_FIELD_DEF);
  	encode_value (token - MONO_TOKEN_FIELD_DEF, p, &p);
  	*endbuf = p;
  }
  
  static void
  encode_ginst (MonoAotCompile *acfg, MonoGenericInst *inst, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  	int i;
  
  	encode_value (inst->type_argc, p, &p);
  	for (i = 0; i < inst->type_argc; ++i)
  		encode_klass_ref (acfg, mono_class_from_mono_type (inst->type_argv [i]), p, &p);
  	*endbuf = p;
  }
  
  static void
  encode_generic_context (MonoAotCompile *acfg, MonoGenericContext *context, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  	MonoGenericInst *inst;
  
  	inst = context->class_inst;
  	if (inst) {
  		g_assert (inst->type_argc);
  		encode_ginst (acfg, inst, p, &p);
  	} else {
  		encode_value (0, p, &p);
  	}
  	inst = context->method_inst;
  	if (inst) {
  		g_assert (inst->type_argc);
  		encode_ginst (acfg, inst, p, &p);
  	} else {
  		encode_value (0, p, &p);
  	}
  	*endbuf = p;
  }
  
  static void
  encode_type (MonoAotCompile *acfg, MonoType *t, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  
  	g_assert (t->num_mods == 0);
  	/* t->attrs can be ignored */
  	//g_assert (t->attrs == 0);
  
  	if (t->pinned) {
  		*p = MONO_TYPE_PINNED;
  		++p;
  	}
  	if (t->byref) {
  		*p = MONO_TYPE_BYREF;
  		++p;
  	}
  
  	*p = t->type;
  	p ++;
  
  	switch (t->type) {
  	case MONO_TYPE_VOID:
  	case MONO_TYPE_BOOLEAN:
  	case MONO_TYPE_CHAR:
  	case MONO_TYPE_I1:
  	case MONO_TYPE_U1:
  	case MONO_TYPE_I2:
  	case MONO_TYPE_U2:
  	case MONO_TYPE_I4:
  	case MONO_TYPE_U4:
  	case MONO_TYPE_I8:
  	case MONO_TYPE_U8:
  	case MONO_TYPE_R4:
  	case MONO_TYPE_R8:
  	case MONO_TYPE_I:
  	case MONO_TYPE_U:
  	case MONO_TYPE_STRING:
  	case MONO_TYPE_OBJECT:
  	case MONO_TYPE_TYPEDBYREF:
  		break;
  	case MONO_TYPE_VALUETYPE:
  	case MONO_TYPE_CLASS:
  		encode_klass_ref (acfg, mono_class_from_mono_type (t), p, &p);
  		break;
  	case MONO_TYPE_SZARRAY:
  		encode_klass_ref (acfg, t->data.klass, p, &p);
  		break;
  	case MONO_TYPE_PTR:
  		encode_type (acfg, t->data.type, p, &p);
  		break;
  	case MONO_TYPE_GENERICINST: {
  		MonoClass *gclass = t->data.generic_class->container_class;
  		MonoGenericInst *inst = t->data.generic_class->context.class_inst;
  
  		encode_klass_ref (acfg, gclass, p, &p);
  		encode_ginst (acfg, inst, p, &p);
  		break;
  	}
  	case MONO_TYPE_ARRAY: {
  		MonoArrayType *array = t->data.array;
  		int i;
  
  		encode_klass_ref (acfg, array->eklass, p, &p);
  		encode_value (array->rank, p, &p);
  		encode_value (array->numsizes, p, &p);
  		for (i = 0; i < array->numsizes; ++i)
  			encode_value (array->sizes [i], p, &p);
  		encode_value (array->numlobounds, p, &p);
  		for (i = 0; i < array->numlobounds; ++i)
  			encode_value (array->lobounds [i], p, &p);
  		break;
  	}
  	case MONO_TYPE_VAR:
  	case MONO_TYPE_MVAR:
  		encode_klass_ref (acfg, mono_class_from_mono_type (t), p, &p);
  		break;
  	default:
  		g_assert_not_reached ();
  	}
  
  	*endbuf = p;
  }
  
  static void
  encode_signature (MonoAotCompile *acfg, MonoMethodSignature *sig, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  	guint32 flags = 0;
  	int i;
  
  	/* Similar to the metadata encoding */
  	if (sig->generic_param_count)
  		flags |= 0x10;
  	if (sig->hasthis)
  		flags |= 0x20;
  	if (sig->explicit_this)
  		flags |= 0x40;
  	flags |= (sig->call_convention & 0x0F);
  
  	*p = flags;
  	++p;
  	if (sig->generic_param_count)
  		encode_value (sig->generic_param_count, p, &p);
  	encode_value (sig->param_count, p, &p);
  
  	encode_type (acfg, sig->ret, p, &p);
  	for (i = 0; i < sig->param_count; ++i) {
  		if (sig->sentinelpos == i) {
  			*p = MONO_TYPE_SENTINEL;
  			++p;
  		}
  		encode_type (acfg, sig->params [i], p, &p);
  	}
  
  	*endbuf = p;
  }
  
  #define MAX_IMAGE_INDEX 250
  
  static void
  encode_method_ref (MonoAotCompile *acfg, MonoMethod *method, guint8 *buf, guint8 **endbuf)
  {
  	guint32 image_index = get_image_index (acfg, method->klass->image);
  	guint32 token = method->token;
  	MonoJumpInfoToken *ji;
  	guint8 *p = buf;
  
  	/*
  	 * The encoding for most methods is as follows:
  	 * - image index encoded as a leb128
  	 * - token index encoded as a leb128
  	 * Values of image index >= MONO_AOT_METHODREF_MIN are used to mark additional
  	 * types of method encodings.
  	 */
  
  	/* Mark methods which can't use aot trampolines because they need the further 
  	 * processing in mono_magic_trampoline () which requires a MonoMethod*.
  	 */
  	if ((method->is_generic && (method->flags & METHOD_ATTRIBUTE_VIRTUAL)) ||
  		(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
  		encode_value ((MONO_AOT_METHODREF_NO_AOT_TRAMPOLINE << 24), p, &p);
  
  	if (method->wrapper_type) {
  		encode_value ((MONO_AOT_METHODREF_WRAPPER << 24), p, &p);
  
  		encode_value (method->wrapper_type, p, &p);
  
  		switch (method->wrapper_type) {
  		case MONO_WRAPPER_REMOTING_INVOKE:
  		case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK:
  		case MONO_WRAPPER_XDOMAIN_INVOKE: {
  			MonoMethod *m;
  
  			m = mono_marshal_method_from_wrapper (method);
  			g_assert (m);
  			encode_method_ref (acfg, m, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_PROXY_ISINST:
  		case MONO_WRAPPER_LDFLD:
  		case MONO_WRAPPER_LDFLDA:
  		case MONO_WRAPPER_STFLD:
  		case MONO_WRAPPER_ISINST: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_klass_ref (acfg, info->d.proxy.klass, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_LDFLD_REMOTE:
  		case MONO_WRAPPER_STFLD_REMOTE:
  			break;
  		case MONO_WRAPPER_ALLOC: {
  			AllocatorWrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			/* The GC name is saved once in MonoAotFileInfo */
  			g_assert (info->alloc_type != -1);
  			encode_value (info->alloc_type, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_WRITE_BARRIER:
  			break;
  		case MONO_WRAPPER_STELEMREF: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_value (info->subtype, p, &p);
  			if (info->subtype == WRAPPER_SUBTYPE_VIRTUAL_STELEMREF)
  				encode_value (info->d.virtual_stelemref.kind, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_UNKNOWN: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_value (info->subtype, p, &p);
  			if (info->subtype == WRAPPER_SUBTYPE_PTR_TO_STRUCTURE ||
  				info->subtype == WRAPPER_SUBTYPE_STRUCTURE_TO_PTR)
  				encode_klass_ref (acfg, method->klass, p, &p);
  			else if (info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER)
  				encode_method_ref (acfg, info->d.synchronized_inner.method, p, &p);
  			else if (info->subtype == WRAPPER_SUBTYPE_ARRAY_ACCESSOR)
  				encode_method_ref (acfg, info->d.array_accessor.method, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_MANAGED_TO_NATIVE: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_value (info->subtype, p, &p);
  			if (info->subtype == WRAPPER_SUBTYPE_ICALL_WRAPPER) {
  				strcpy ((char*)p, method->name);
  				p += strlen (method->name) + 1;
  			} else if (info->subtype == WRAPPER_SUBTYPE_NATIVE_FUNC_AOT) {
  				encode_method_ref (acfg, info->d.managed_to_native.method, p, &p);
  			} else {
  				g_assert (info->subtype == WRAPPER_SUBTYPE_NONE || info->subtype == WRAPPER_SUBTYPE_PINVOKE);
  				encode_method_ref (acfg, info->d.managed_to_native.method, p, &p);
  			}
  			break;
  		}
  		case MONO_WRAPPER_SYNCHRONIZED: {
  			MonoMethod *m;
  
  			m = mono_marshal_method_from_wrapper (method);
  			g_assert (m);
  			g_assert (m != method);
  			encode_method_ref (acfg, m, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_MANAGED_TO_MANAGED: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_value (info->subtype, p, &p);
  
  			if (info->subtype == WRAPPER_SUBTYPE_ELEMENT_ADDR) {
  				encode_value (info->d.element_addr.rank, p, &p);
  				encode_value (info->d.element_addr.elem_size, p, &p);
  			} else if (info->subtype == WRAPPER_SUBTYPE_STRING_CTOR) {
  				encode_method_ref (acfg, info->d.string_ctor.method, p, &p);
  			} else {
  				g_assert_not_reached ();
  			}
  			break;
  		}
  		case MONO_WRAPPER_CASTCLASS: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_value (info->subtype, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_RUNTIME_INVOKE: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_value (info->subtype, p, &p);
  			if (info->subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_DIRECT || info->subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_VIRTUAL)
  				encode_method_ref (acfg, info->d.runtime_invoke.method, p, &p);
  			else if (info->subtype == WRAPPER_SUBTYPE_RUNTIME_INVOKE_NORMAL)
  				encode_signature (acfg, info->d.runtime_invoke.sig, p, &p);
  			break;
  		}
  		case MONO_WRAPPER_DELEGATE_INVOKE:
  		case MONO_WRAPPER_DELEGATE_BEGIN_INVOKE:
  		case MONO_WRAPPER_DELEGATE_END_INVOKE: {
  			if (method->is_inflated) {
  				/* These wrappers are identified by their class */
  				encode_value (1, p, &p);
  				encode_klass_ref (acfg, method->klass, p, &p);
  			} else {
  				MonoMethodSignature *sig = mono_method_signature (method);
  				WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  				encode_value (0, p, &p);
  				if (method->wrapper_type == MONO_WRAPPER_DELEGATE_INVOKE)
  					encode_value (info ? info->subtype : 0, p, &p);
  				encode_signature (acfg, sig, p, &p);
  			}
  			break;
  		}
  		case MONO_WRAPPER_NATIVE_TO_MANAGED: {
  			WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  			g_assert (info);
  			encode_method_ref (acfg, info->d.native_to_managed.method, p, &p);
  			encode_klass_ref (acfg, info->d.native_to_managed.klass, p, &p);
  			break;
  		}
  		default:
  			g_assert_not_reached ();
  		}
  	} else if (mono_method_signature (method)->is_inflated) {
  		/* 
  		 * This is a generic method, find the original token which referenced it and
  		 * encode that.
  		 * Obtain the token from information recorded by the JIT.
  		 */
  		ji = g_hash_table_lookup (acfg->token_info_hash, method);
  		if (ji) {
  			image_index = get_image_index (acfg, ji->image);
  			g_assert (image_index < MAX_IMAGE_INDEX);
  			token = ji->token;
  
  			encode_value ((MONO_AOT_METHODREF_METHODSPEC << 24), p, &p);
  			encode_value (image_index, p, &p);
  			encode_value (token, p, &p);
  		} else {
  			MonoMethod *declaring;
  			MonoGenericContext *context = mono_method_get_context (method);
  
  			g_assert (method->is_inflated);
  			declaring = ((MonoMethodInflated*)method)->declaring;
  
  			/*
  			 * This might be a non-generic method of a generic instance, which 
  			 * doesn't have a token since the reference is generated by the JIT 
  			 * like Nullable:Box/Unbox, or by generic sharing.
  			 */
  			encode_value ((MONO_AOT_METHODREF_GINST << 24), p, &p);
  			/* Encode the klass */
  			encode_klass_ref (acfg, method->klass, p, &p);
  			/* Encode the method */
  			image_index = get_image_index (acfg, method->klass->image);
  			g_assert (image_index < MAX_IMAGE_INDEX);
  			g_assert (declaring->token);
  			token = declaring->token;
  			g_assert (mono_metadata_token_table (token) == MONO_TABLE_METHOD);
  			encode_value (image_index, p, &p);
  			encode_value (token, p, &p);
  			encode_generic_context (acfg, context, p, &p);
  		}
  	} else if (token == 0) {
  		/* This might be a method of a constructed type like int[,].Set */
  		/* Obtain the token from information recorded by the JIT */
  		ji = g_hash_table_lookup (acfg->token_info_hash, method);
  		if (ji) {
  			image_index = get_image_index (acfg, ji->image);
  			g_assert (image_index < MAX_IMAGE_INDEX);
  			token = ji->token;
  
  			encode_value ((MONO_AOT_METHODREF_METHODSPEC << 24), p, &p);
  			encode_value (image_index, p, &p);
  			encode_value (token, p, &p);
  		} else {
  			/* Array methods */
  			g_assert (method->klass->rank);
  
  			/* Encode directly */
  			encode_value ((MONO_AOT_METHODREF_ARRAY << 24), p, &p);
  			encode_klass_ref (acfg, method->klass, p, &p);
  			if (!strcmp (method->name, ".ctor") && mono_method_signature (method)->param_count == method->klass->rank)
  				encode_value (0, p, &p);
  			else if (!strcmp (method->name, ".ctor") && mono_method_signature (method)->param_count == method->klass->rank * 2)
  				encode_value (1, p, &p);
  			else if (!strcmp (method->name, "Get"))
  				encode_value (2, p, &p);
  			else if (!strcmp (method->name, "Address"))
  				encode_value (3, p, &p);
  			else if (!strcmp (method->name, "Set"))
  				encode_value (4, p, &p);
  			else
  				g_assert_not_reached ();
  		}
  	} else {
  		g_assert (mono_metadata_token_table (token) == MONO_TABLE_METHOD);
  
  		if (image_index >= MONO_AOT_METHODREF_MIN) {
  			encode_value ((MONO_AOT_METHODREF_LARGE_IMAGE_INDEX << 24), p, &p);
  			encode_value (image_index, p, &p);
  			encode_value (mono_metadata_token_index (token), p, &p);
  		} else {
  			encode_value ((image_index << 24) | mono_metadata_token_index (token), p, &p);
  		}
  	}
  	*endbuf = p;
  }
  
  static gint
  compare_patches (gconstpointer a, gconstpointer b)
  {
  	int i, j;
  
  	i = (*(MonoJumpInfo**)a)->ip.i;
  	j = (*(MonoJumpInfo**)b)->ip.i;
  
  	if (i < j)
  		return -1;
  	else
  		if (i > j)
  			return 1;
  	else
  		return 0;
  }
  
  static G_GNUC_UNUSED char*
  patch_to_string (MonoJumpInfo *patch_info)
  {
  	GString *str;
  
  	str = g_string_new ("");
  
  	g_string_append_printf (str, "%s(", get_patch_name (patch_info->type));
  
  	switch (patch_info->type) {
  	case MONO_PATCH_INFO_VTABLE:
  		mono_type_get_desc (str, &patch_info->data.klass->byval_arg, TRUE);
  		break;
  	default:
  		break;
  	}
  	g_string_append_printf (str, ")");
  	return g_string_free (str, FALSE);
  }
  
  /*
   * is_plt_patch:
   *
   *   Return whenever PATCH_INFO refers to a direct call, and thus requires a
   * PLT entry.
   */
  static inline gboolean
  is_plt_patch (MonoJumpInfo *patch_info)
  {
  	switch (patch_info->type) {
  	case MONO_PATCH_INFO_METHOD:
  	case MONO_PATCH_INFO_INTERNAL_METHOD:
  	case MONO_PATCH_INFO_JIT_ICALL_ADDR:
  	case MONO_PATCH_INFO_ICALL_ADDR:
  	case MONO_PATCH_INFO_CLASS_INIT:
  	case MONO_PATCH_INFO_RGCTX_FETCH:
  	case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
  	case MONO_PATCH_INFO_MONITOR_ENTER:
  	case MONO_PATCH_INFO_MONITOR_EXIT:
  	case MONO_PATCH_INFO_LLVM_IMT_TRAMPOLINE:
  		return TRUE;
  	default:
  		return FALSE;
  	}
  }
  
  /*
   * get_plt_symbol:
   *
   *   Return the symbol identifying the plt entry PLT_OFFSET.
   */
  static char*
  get_plt_symbol (MonoAotCompile *acfg, int plt_offset, MonoJumpInfo *patch_info)
  {
  #ifdef TARGET_MACH
  	/* 
  	 * The Apple linker reorganizes object files, so it doesn't like branches to local
  	 * labels, since those have no relocations.
  	 */
  	return g_strdup_printf ("%sp_%d", acfg->llvm_label_prefix, plt_offset);
  #else
  	return g_strdup_printf ("%sp_%d", acfg->temp_prefix, plt_offset);
  #endif
  }
  
  /*
   * get_plt_entry:
   *
   *   Return a PLT entry which belongs to the method identified by PATCH_INFO.
   */
  static MonoPltEntry*
  get_plt_entry (MonoAotCompile *acfg, MonoJumpInfo *patch_info)
  {
  	MonoPltEntry *res;
  
  	if (!is_plt_patch (patch_info))
  		return NULL;
  
  	if (!acfg->patch_to_plt_entry [patch_info->type])
  		acfg->patch_to_plt_entry [patch_info->type] = g_hash_table_new (mono_patch_info_hash, mono_patch_info_equal);
  	res = g_hash_table_lookup (acfg->patch_to_plt_entry [patch_info->type], patch_info);
  
  	// FIXME: This breaks the calculation of final_got_size		
  	if (!acfg->llvm && patch_info->type == MONO_PATCH_INFO_METHOD && (patch_info->data.method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)) {
  		/* 
  		 * Allocate a separate PLT slot for each such patch, since some plt
  		 * entries will refer to the method itself, and some will refer to the
  		 * wrapper.
  		 */
  		res = NULL;
  	}
  
  	if (!res) {
  		MonoJumpInfo *new_ji;
  
  		g_assert (!acfg->final_got_size);
  
  		new_ji = mono_patch_info_dup_mp (acfg->mempool, patch_info);
  
  		res = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoPltEntry));
  		res->plt_offset = acfg->plt_offset;
  		res->ji = new_ji;
  		res->symbol = get_plt_symbol (acfg, res->plt_offset, patch_info);
  		if (acfg->aot_opts.write_symbols)
  			res->debug_sym = get_plt_entry_debug_sym (acfg, res->ji, acfg->plt_entry_debug_sym_cache);
  		if (res->debug_sym)
  			res->llvm_symbol = g_strdup_printf ("%s_%s_llvm", res->symbol, res->debug_sym);
  		else
  			res->llvm_symbol = g_strdup_printf ("%s_llvm", res->symbol);
  
  		g_hash_table_insert (acfg->patch_to_plt_entry [new_ji->type], new_ji, res);
  
  		g_hash_table_insert (acfg->plt_offset_to_entry, GUINT_TO_POINTER (res->plt_offset), res);
  
  		//g_assert (mono_patch_info_equal (patch_info, new_ji));
  		//mono_print_ji (patch_info); printf ("\n");
  		//g_hash_table_print_stats (acfg->patch_to_plt_entry);
  
  		acfg->plt_offset ++;
  	}
  
  	return res;
  }
  
  /**
   * get_got_offset:
   *
   *   Returns the offset of the GOT slot where the runtime object resulting from resolving
   * JI could be found if it exists, otherwise allocates a new one.
   */
  static guint32
  get_got_offset (MonoAotCompile *acfg, MonoJumpInfo *ji)
  {
  	guint32 got_offset;
  
  	got_offset = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->patch_to_got_offset_by_type [ji->type], ji));
  	if (got_offset)
  		return got_offset - 1;
  
  	got_offset = acfg->got_offset;
  	acfg->got_offset ++;
  
  	if (acfg->final_got_size)
  		g_assert (got_offset < acfg->final_got_size);
  
  	acfg->stats.got_slots ++;
  	acfg->stats.got_slot_types [ji->type] ++;
  
  	g_hash_table_insert (acfg->patch_to_got_offset, ji, GUINT_TO_POINTER (got_offset + 1));
  	g_hash_table_insert (acfg->patch_to_got_offset_by_type [ji->type], ji, GUINT_TO_POINTER (got_offset + 1));
  	g_ptr_array_add (acfg->got_patches, ji);
  
  	return got_offset;
  }
  
  /* Add a method to the list of methods which need to be emitted */
  static void
  add_method_with_index (MonoAotCompile *acfg, MonoMethod *method, int index, gboolean extra)
  {
  	g_assert (method);
  	if (!g_hash_table_lookup (acfg->method_indexes, method)) {
  		g_ptr_array_add (acfg->methods, method);
  		g_hash_table_insert (acfg->method_indexes, method, GUINT_TO_POINTER (index + 1));
  		acfg->nmethods = acfg->methods->len + 1;
  	}
  
  	if (method->wrapper_type || extra)
  		g_ptr_array_add (acfg->extra_methods, method);
  }
  
  static guint32
  get_method_index (MonoAotCompile *acfg, MonoMethod *method)
  {
  	int index = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_indexes, method));
  	
  	g_assert (index);
  
  	return index - 1;
  }
  
  static int
  add_method_full (MonoAotCompile *acfg, MonoMethod *method, gboolean extra, int depth)
  {
  	int index;
  
  	index = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_indexes, method));
  	if (index)
  		return index - 1;
  
  	index = acfg->method_index;
  	add_method_with_index (acfg, method, index, extra);
  
  	g_ptr_array_add (acfg->method_order, GUINT_TO_POINTER (index));
  
  	g_hash_table_insert (acfg->method_depth, method, GUINT_TO_POINTER (depth));
  
  	acfg->method_index ++;
  
  	return index;
  }
  
  static int
  add_method (MonoAotCompile *acfg, MonoMethod *method)
  {
  	return add_method_full (acfg, method, FALSE, 0);
  }
  
  static void
  add_extra_method_with_depth (MonoAotCompile *acfg, MonoMethod *method, int depth)
  {
  	if (mono_method_is_generic_sharable_full (method, FALSE, TRUE, FALSE))
  		method = mini_get_shared_method (method);
  
  	if (acfg->aot_opts.log_generics)
  		aot_printf (acfg, "%*sAdding method %s.\n", depth, "", mono_method_full_name (method, TRUE));
  
  	add_method_full (acfg, method, TRUE, depth);
  }
  
  static void
  add_extra_method (MonoAotCompile *acfg, MonoMethod *method)
  {
  	add_extra_method_with_depth (acfg, method, 0);
  }
  
  static void
  add_jit_icall_wrapper (gpointer key, gpointer value, gpointer user_data)
  {
  	MonoAotCompile *acfg = user_data;
  	MonoJitICallInfo *callinfo = value;
  	MonoMethod *wrapper;
  	char *name;
  
  	if (!callinfo->sig)
  		return;
  
  	name = g_strdup_printf ("__icall_wrapper_%s", callinfo->name);
  	wrapper = mono_marshal_get_icall_wrapper (callinfo->sig, name, callinfo->func, check_for_pending_exc);
  	g_free (name);
  
  	add_method (acfg, wrapper);
  }
  
  static MonoMethod*
  get_runtime_invoke_sig (MonoMethodSignature *sig)
  {
  	MonoMethodBuilder *mb;
  	MonoMethod *m;
  
  	mb = mono_mb_new (mono_defaults.object_class, "FOO", MONO_WRAPPER_NONE);
  	m = mono_mb_create_method (mb, sig, 16);
  	return mono_marshal_get_runtime_invoke (m, FALSE);
  }
  
  static gboolean
  can_marshal_struct (MonoClass *klass)
  {
  	MonoClassField *field;
  	gboolean can_marshal = TRUE;
  	gpointer iter = NULL;
  	MonoMarshalType *info;
  	int i;
  
  	if ((klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_AUTO_LAYOUT)
  		return FALSE;
  
  	info = mono_marshal_load_type_info (klass);
  
  	/* Only allow a few field types to avoid asserts in the marshalling code */
  	while ((field = mono_class_get_fields (klass, &iter))) {
  		if ((field->type->attrs & FIELD_ATTRIBUTE_STATIC))
  			continue;
  
  		switch (field->type->type) {
  		case MONO_TYPE_I4:
  		case MONO_TYPE_U4:
  		case MONO_TYPE_I1:
  		case MONO_TYPE_U1:
  		case MONO_TYPE_BOOLEAN:
  		case MONO_TYPE_I2:
  		case MONO_TYPE_U2:
  		case MONO_TYPE_CHAR:
  		case MONO_TYPE_I8:
  		case MONO_TYPE_U8:
  		case MONO_TYPE_I:
  		case MONO_TYPE_U:
  		case MONO_TYPE_PTR:
  		case MONO_TYPE_R4:
  		case MONO_TYPE_R8:
  		case MONO_TYPE_STRING:
  			break;
  		case MONO_TYPE_VALUETYPE:
  			if (!mono_class_from_mono_type (field->type)->enumtype && !can_marshal_struct (mono_class_from_mono_type (field->type)))
  				can_marshal = FALSE;
  			break;
  		case MONO_TYPE_SZARRAY: {
  			gboolean has_mspec = FALSE;
  
  			if (info) {
  				for (i = 0; i < info->num_fields; ++i) {
  					if (info->fields [i].field == field && info->fields [i].mspec)
  						has_mspec = TRUE;
  				}
  			}
  			if (!has_mspec)
  				can_marshal = FALSE;
  			break;
  		}
  		default:
  			can_marshal = FALSE;
  			break;
  		}
  	}
  
  	/* Special cases */
  	/* Its hard to compute whenever these can be marshalled or not */
  	if (!strcmp (klass->name_space, "System.Net.NetworkInformation.MacOsStructs") && strcmp (klass->name, "sockaddr_dl"))
  		return TRUE;
  
  	return can_marshal;
  }
  
  static void
  create_gsharedvt_inst (MonoAotCompile *acfg, MonoMethod *method, MonoGenericContext *ctx)
  {
  	/* Create a vtype instantiation */
  	MonoGenericContext shared_context;
  	MonoType **args;
  	MonoGenericInst *inst;
  	MonoGenericContainer *container;
  	MonoClass **constraints;
  	int i;
  
  	memset (ctx, 0, sizeof (MonoGenericContext));
  
  	if (method->klass->generic_container) {
  		shared_context = method->klass->generic_container->context;
  		inst = shared_context.class_inst;
  
  		args = g_new0 (MonoType*, inst->type_argc);
  		for (i = 0; i < inst->type_argc; ++i) {
  			args [i] = &mono_defaults.int_class->byval_arg;
  		}
  		ctx->class_inst = mono_metadata_get_generic_inst (inst->type_argc, args);
  	}
  	if (method->is_generic) {
  		container = mono_method_get_generic_container (method);
  		shared_context = container->context;
  		inst = shared_context.method_inst;
  
  		args = g_new0 (MonoType*, inst->type_argc);
  		for (i = 0; i < container->type_argc; ++i) {
  			MonoGenericParamInfo *info = &container->type_params [i].info;
  			gboolean ref_only = FALSE;
  
  			if (info && info->constraints) {
  				constraints = info->constraints;
  
  				while (*constraints) {
  					MonoClass *cklass = *constraints;
  					if (!(cklass == mono_defaults.object_class || (cklass->image == mono_defaults.corlib && !strcmp (cklass->name, "ValueType"))))
  						/* Inflaring the method with our vtype would not be valid */
  						ref_only = TRUE;
  					constraints ++;
  				}
  			}
  
  			if (ref_only)
  				args [i] = &mono_defaults.object_class->byval_arg;
  			else
  				args [i] = &mono_defaults.int_class->byval_arg;
  		}
  		ctx->method_inst = mono_metadata_get_generic_inst (inst->type_argc, args);
  	}
  }
  
  static void
  add_wrappers (MonoAotCompile *acfg)
  {
  	MonoMethod *method, *m;
  	int i, j;
  	MonoMethodSignature *sig, *csig;
  	guint32 token;
  
  	/* 
  	 * FIXME: Instead of AOTing all the wrappers, it might be better to redesign them
  	 * so there is only one wrapper of a given type, or inlining their contents into their
  	 * callers.
  	 */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
  		MonoMethod *method;
  		guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
  		gboolean skip = FALSE;
  
  		method = mono_get_method (acfg->image, token, NULL);
  
  		if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
  			(method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
  			(method->flags & METHOD_ATTRIBUTE_ABSTRACT))
  			skip = TRUE;
  
  		/* Skip methods which can not be handled by get_runtime_invoke () */
  		sig = mono_method_signature (method);
  		if (!sig)
  			continue;
  		if ((sig->ret->type == MONO_TYPE_PTR) ||
  			(sig->ret->type == MONO_TYPE_TYPEDBYREF))
  			skip = TRUE;
  		if (mono_class_is_open_constructed_type (sig->ret))
  			skip = TRUE;
  
  		for (j = 0; j < sig->param_count; j++) {
  			if (sig->params [j]->type == MONO_TYPE_TYPEDBYREF)
  				skip = TRUE;
  			if (mono_class_is_open_constructed_type (sig->params [j]))
  				skip = TRUE;
  		}
  
  #ifdef MONO_ARCH_DYN_CALL_SUPPORTED
  		if (!mono_class_is_contextbound (method->klass)) {
  			MonoDynCallInfo *info = mono_arch_dyn_call_prepare (sig);
  			gboolean has_nullable = FALSE;
  
  			for (j = 0; j < sig->param_count; j++) {
  				if (sig->params [j]->type == MONO_TYPE_GENERICINST && mono_class_is_nullable (mono_class_from_mono_type (sig->params [j])))
  					has_nullable = TRUE;
  			}
  
  			if (info && !has_nullable) {
  				/* Supported by the dynamic runtime-invoke wrapper */
  				skip = TRUE;
  			}
  			if (info)
  				mono_arch_dyn_call_free (info);
  		}
  #endif
  
  		if (!skip) {
  			//printf ("%s\n", mono_method_full_name (method, TRUE));
  			add_method (acfg, mono_marshal_get_runtime_invoke (method, FALSE));
  		}
   	}
  
  	if (strcmp (acfg->image->assembly->aname.name, "mscorlib") == 0) {
  		MonoMethodDesc *desc;
  		MonoMethod *orig_method;
  		int nallocators;
  
  		/* Runtime invoke wrappers */
  
  		/* void runtime-invoke () [.cctor] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 0);
  		csig->ret = &mono_defaults.void_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* void runtime-invoke () [Finalize] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 0);
  		csig->hasthis = 1;
  		csig->ret = &mono_defaults.void_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* void runtime-invoke (string) [exception ctor] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 1);
  		csig->hasthis = 1;
  		csig->ret = &mono_defaults.void_class->byval_arg;
  		csig->params [0] = &mono_defaults.string_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* void runtime-invoke (string, string) [exception ctor] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 2);
  		csig->hasthis = 1;
  		csig->ret = &mono_defaults.void_class->byval_arg;
  		csig->params [0] = &mono_defaults.string_class->byval_arg;
  		csig->params [1] = &mono_defaults.string_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* string runtime-invoke () [Exception.ToString ()] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 0);
  		csig->hasthis = 1;
  		csig->ret = &mono_defaults.string_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* void runtime-invoke (string, Exception) [exception ctor] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 2);
  		csig->hasthis = 1;
  		csig->ret = &mono_defaults.void_class->byval_arg;
  		csig->params [0] = &mono_defaults.string_class->byval_arg;
  		csig->params [1] = &mono_defaults.exception_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* Assembly runtime-invoke (string, bool) [DoAssemblyResolve] */
  		csig = mono_metadata_signature_alloc (mono_defaults.corlib, 2);
  		csig->hasthis = 1;
  		csig->ret = &(mono_class_from_name (
  											mono_defaults.corlib, "System.Reflection", "Assembly"))->byval_arg;
  		csig->params [0] = &mono_defaults.string_class->byval_arg;
  		csig->params [1] = &mono_defaults.boolean_class->byval_arg;
  		add_method (acfg, get_runtime_invoke_sig (csig));
  
  		/* runtime-invoke used by finalizers */
  		add_method (acfg, mono_marshal_get_runtime_invoke (mono_class_get_method_from_name_flags (mono_defaults.object_class, "Finalize", 0, 0), TRUE));
  
  		/* This is used by mono_runtime_capture_context () */
  		method = mono_get_context_capture_method ();
  		if (method)
  			add_method (acfg, mono_marshal_get_runtime_invoke (method, FALSE));
  
  #ifdef MONO_ARCH_DYN_CALL_SUPPORTED
  		add_method (acfg, mono_marshal_get_runtime_invoke_dynamic ());
  #endif
  
  		/* stelemref */
  		add_method (acfg, mono_marshal_get_stelemref ());
  
  		if (MONO_ARCH_HAVE_TLS_GET) {
  			/* Managed Allocators */
  			nallocators = mono_gc_get_managed_allocator_types ();
  			for (i = 0; i < nallocators; ++i) {
  				m = mono_gc_get_managed_allocator_by_type (i);
  				if (m)
  					add_method (acfg, m);
  			}
  
  			/* Monitor Enter/Exit */
  			desc = mono_method_desc_new ("Monitor:Enter(object,bool&)", FALSE);
  			orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
  			/* This is a v4 method */
  			if (orig_method) {
  				method = mono_monitor_get_fast_path (orig_method);
  				if (method)
  					add_method (acfg, method);
  			}
  			mono_method_desc_free (desc);
  
  			desc = mono_method_desc_new ("Monitor:Exit(object)", FALSE);
  			orig_method = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
  			g_assert (orig_method);
  			mono_method_desc_free (desc);
  			method = mono_monitor_get_fast_path (orig_method);
  			if (method)
  				add_method (acfg, method);
  		}
  
  		/* Stelemref wrappers */
  		{
  			MonoMethod **wrappers;
  			int nwrappers;
  
  			wrappers = mono_marshal_get_virtual_stelemref_wrappers (&nwrappers);
  			for (i = 0; i < nwrappers; ++i)
  				add_method (acfg, wrappers [i]);
  			g_free (wrappers);
  		}
  
  		/* castclass_with_check wrapper */
  		add_method (acfg, mono_marshal_get_castclass_with_cache ());
  		/* isinst_with_check wrapper */
  		add_method (acfg, mono_marshal_get_isinst_with_cache ());
  
  #if defined(MONO_ARCH_ENABLE_MONITOR_IL_FASTPATH)
  		{
  			MonoMethodDesc *desc;
  			MonoMethod *m;
  
  			desc = mono_method_desc_new ("Monitor:Enter(object,bool&)", FALSE);
  			m = mono_method_desc_search_in_class (desc, mono_defaults.monitor_class);
  			mono_method_desc_free (desc);
  			if (m) {
  				m = mono_monitor_get_fast_path (m);
  				if (m)
  					add_method (acfg, m);
  			}
  		}
  #endif
  
  		/* JIT icall wrappers */
  		/* FIXME: locking - this is "safe" as full-AOT threads don't mutate the icall hash*/
  		g_hash_table_foreach (mono_get_jit_icall_info (), add_jit_icall_wrapper, acfg);
  	}
  
  	/* 
  	 * remoting-invoke-with-check wrappers are very frequent, so avoid emitting them,
  	 * we use the original method instead at runtime.
  	 * Since full-aot doesn't support remoting, this is not a problem.
  	 */
  #if 0
  	/* remoting-invoke wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
  		MonoMethodSignature *sig;
  		
  		token = MONO_TOKEN_METHOD_DEF | (i + 1);
  		method = mono_get_method (acfg->image, token, NULL);
  
  		sig = mono_method_signature (method);
  
  		if (sig->hasthis && (method->klass->marshalbyref || method->klass == mono_defaults.object_class)) {
  			m = mono_marshal_get_remoting_invoke_with_check (method);
  
  			add_method (acfg, m);
  		}
  	}
  #endif
  
  	/* delegate-invoke wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i) {
  		MonoError error;
  		MonoClass *klass;
  		MonoCustomAttrInfo *cattr;
  		
  		token = MONO_TOKEN_TYPE_DEF | (i + 1);
  		klass = mono_class_get_checked (acfg->image, token, &error);
  
  		if (!klass) {
  			mono_error_cleanup (&error);
  			continue;
  		}
  
  		if (!klass->delegate || klass == mono_defaults.delegate_class || klass == mono_defaults.multicastdelegate_class)
  			continue;
  
  		if (!klass->generic_container) {
  			method = mono_get_delegate_invoke (klass);
  
  			m = mono_marshal_get_delegate_invoke (method, NULL);
  
  			add_method (acfg, m);
  
  			method = mono_class_get_method_from_name_flags (klass, "BeginInvoke", -1, 0);
  			if (method)
  				add_method (acfg, mono_marshal_get_delegate_begin_invoke (method));
  
  			method = mono_class_get_method_from_name_flags (klass, "EndInvoke", -1, 0);
  			if (method)
  				add_method (acfg, mono_marshal_get_delegate_end_invoke (method));
  
  			cattr = mono_custom_attrs_from_class (klass);
  
  			if (cattr) {
  				int j;
  
  				for (j = 0; j < cattr->num_attrs; ++j)
  					if (cattr->attrs [j].ctor && (!strcmp (cattr->attrs [j].ctor->klass->name, "MonoNativeFunctionWrapperAttribute") || !strcmp (cattr->attrs [j].ctor->klass->name, "UnmanagedFunctionPointerAttribute")))
  						break;
  				if (j < cattr->num_attrs)
  					add_method (acfg, mono_marshal_get_native_func_wrapper_aot (klass));
  			}
  		} else if ((acfg->opts & MONO_OPT_GSHAREDVT) && klass->generic_container) {
  			MonoGenericContext ctx;
  			MonoMethod *inst, *gshared;
  
  			/*
  			 * Emit gsharedvt versions of the generic delegate-invoke wrappers
  			 */
  			/* Invoke */
  			method = mono_get_delegate_invoke (klass);
  			create_gsharedvt_inst (acfg, method, &ctx);
  
  			inst = mono_class_inflate_generic_method (method, &ctx);
  
  			m = mono_marshal_get_delegate_invoke (inst, NULL);
  			g_assert (m->is_inflated);
  
  			gshared = mini_get_shared_method_full (m, FALSE, TRUE);
  			add_extra_method (acfg, gshared);
  
  			/* begin-invoke */
  			method = mono_get_delegate_begin_invoke (klass);
  			create_gsharedvt_inst (acfg, method, &ctx);
  
  			inst = mono_class_inflate_generic_method (method, &ctx);
  
  			m = mono_marshal_get_delegate_begin_invoke (inst);
  			g_assert (m->is_inflated);
  
  			gshared = mini_get_shared_method_full (m, FALSE, TRUE);
  			add_extra_method (acfg, gshared);
  
  			/* end-invoke */
  			method = mono_get_delegate_end_invoke (klass);
  			create_gsharedvt_inst (acfg, method, &ctx);
  
  			inst = mono_class_inflate_generic_method (method, &ctx);
  
  			m = mono_marshal_get_delegate_end_invoke (inst);
  			g_assert (m->is_inflated);
  
  			gshared = mini_get_shared_method_full (m, FALSE, TRUE);
  			add_extra_method (acfg, gshared);
  
  		}
  	}
  
  	/* array access wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPESPEC].rows; ++i) {
  		MonoError error;
  		MonoClass *klass;
  		
  		token = MONO_TOKEN_TYPE_SPEC | (i + 1);
  		klass = mono_class_get_checked (acfg->image, token, &error);
  
  		if (!klass) {
  			mono_error_cleanup (&error);
  			continue;
  		}
  
  		if (klass->rank && MONO_TYPE_IS_PRIMITIVE (&klass->element_class->byval_arg)) {
  			MonoMethod *m, *wrapper;
  
  			/* Add runtime-invoke wrappers too */
  
  			m = mono_class_get_method_from_name (klass, "Get", -1);
  			g_assert (m);
  			wrapper = mono_marshal_get_array_accessor_wrapper (m);
  			add_extra_method (acfg, wrapper);
  			add_extra_method (acfg, mono_marshal_get_runtime_invoke (wrapper, FALSE));
  
  			m = mono_class_get_method_from_name (klass, "Set", -1);
  			g_assert (m);
  			wrapper = mono_marshal_get_array_accessor_wrapper (m);
  			add_extra_method (acfg, wrapper);
  			add_extra_method (acfg, mono_marshal_get_runtime_invoke (wrapper, FALSE));
  		}
  	}
  
  	/* Synchronized wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
  		token = MONO_TOKEN_METHOD_DEF | (i + 1);
  		method = mono_get_method (acfg->image, token, NULL);
  
  		if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
  			if (method->is_generic) {
  				// FIXME:
  			} else if (method->klass->generic_container) {
  				MonoGenericContext ctx;
  				MonoMethod *inst, *gshared, *m;
  
  				/*
  				 * Create a generic wrapper for a generic instance, and AOT that.
  				 */
  				create_gsharedvt_inst (acfg, method, &ctx);
  				inst = mono_class_inflate_generic_method (method, &ctx);	
  				m = mono_marshal_get_synchronized_wrapper (inst);
  				g_assert (m->is_inflated);
  				gshared = mini_get_shared_method_full (m, FALSE, TRUE);
  				add_method (acfg, gshared);
  			} else {
  				add_method (acfg, mono_marshal_get_synchronized_wrapper (method));
  			}
  		}
  	}
  
  	/* pinvoke wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
  		MonoMethod *method;
  		guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
  
  		method = mono_get_method (acfg->image, token, NULL);
  
  		if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
  			(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
  			add_method (acfg, mono_marshal_get_native_wrapper (method, TRUE, TRUE));
  		}
  	}
   
  	/* native-to-managed wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_METHOD].rows; ++i) {
  		MonoMethod *method;
  		guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
  		MonoCustomAttrInfo *cattr;
  		int j;
  
  		method = mono_get_method (acfg->image, token, NULL);
  
  		/* 
  		 * Only generate native-to-managed wrappers for methods which have an
  		 * attribute named MonoPInvokeCallbackAttribute. We search for the attribute by
  		 * name to avoid defining a new assembly to contain it.
  		 */
  		cattr = mono_custom_attrs_from_method (method);
  
  		if (cattr) {
  			for (j = 0; j < cattr->num_attrs; ++j)
  				if (cattr->attrs [j].ctor && !strcmp (cattr->attrs [j].ctor->klass->name, "MonoPInvokeCallbackAttribute"))
  					break;
  			if (j < cattr->num_attrs) {
  				MonoCustomAttrEntry *e = &cattr->attrs [j];
  				MonoMethodSignature *sig = mono_method_signature (e->ctor);
  				const char *p = (const char*)e->data;
  				const char *named;
  				int slen, num_named, named_type, data_type;
  				char *n;
  				MonoType *t;
  				MonoClass *klass;
  				char *export_name = NULL;
  				MonoMethod *wrapper;
  
  				/* this cannot be enforced by the C# compiler so we must give the user some warning before aborting */
  				if (!(method->flags & METHOD_ATTRIBUTE_STATIC)) {
  					g_warning ("AOT restriction: Method '%s' must be static since it is decorated with [MonoPInvokeCallback]. See http://ios.xamarin.com/Documentation/Limitations#Reverse_Callbacks", 
  						mono_method_full_name (method, TRUE));
  					exit (1);
  				}
  
  				g_assert (sig->param_count == 1);
  				g_assert (sig->params [0]->type == MONO_TYPE_CLASS && !strcmp (mono_class_from_mono_type (sig->params [0])->name, "Type"));
  
  				/* 
  				 * Decode the cattr manually since we can't create objects
  				 * during aot compilation.
  				 */
  					
  				/* Skip prolog */
  				p += 2;
  
  				/* From load_cattr_value () in reflection.c */
  				slen = mono_metadata_decode_value (p, &p);
  				n = g_memdup (p, slen + 1);
  				n [slen] = 0;
  				t = mono_reflection_type_from_name (n, acfg->image);
  				g_assert (t);
  				g_free (n);
  
  				klass = mono_class_from_mono_type (t);
  				g_assert (klass->parent == mono_defaults.multicastdelegate_class);
  
  				p += slen;
  
  				num_named = read16 (p);
  				p += 2;
  
  				g_assert (num_named < 2);
  				if (num_named == 1) {
  					int name_len;
  					char *name;
  					MonoType *prop_type;
  
  					/* parse ExportSymbol attribute */
  					named = p;
  					named_type = *named;
  					named += 1;
  					data_type = *named;
  					named += 1;
  
  					name_len = mono_metadata_decode_blob_size (named, &named);
  					name = g_malloc (name_len + 1);
  					memcpy (name, named, name_len);
  					name [name_len] = 0;
  					named += name_len;
  
  					g_assert (named_type == 0x54);
  					g_assert (!strcmp (name, "ExportSymbol"));
  
  					prop_type = &mono_defaults.string_class->byval_arg;
  
  					/* load_cattr_value (), string case */
  					g_assert (*named != (char)0xff);
  					slen = mono_metadata_decode_value (named, &named);
  					export_name = g_malloc (slen + 1);
  					memcpy (export_name, named, slen);
  					export_name [slen] = 0;
  					named += slen;
  				}
  
  				wrapper = mono_marshal_get_managed_wrapper (method, klass, 0);
  				add_method (acfg, wrapper);
  				if (export_name)
  					g_hash_table_insert (acfg->export_names, wrapper, export_name);
  			}
  		}
  
  		if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
  			(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
  			add_method (acfg, mono_marshal_get_native_wrapper (method, TRUE, TRUE));
  		}
  	}
  
  	/* StructureToPtr/PtrToStructure wrappers */
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i) {
  		MonoError error;
  		MonoClass *klass;
  		
  		token = MONO_TOKEN_TYPE_DEF | (i + 1);
  		klass = mono_class_get_checked (acfg->image, token, &error);
  
  		if (!klass) {
  			mono_error_cleanup (&error);
  			continue;
  		}
  
  		if (klass->valuetype && !klass->generic_container && can_marshal_struct (klass) &&
  			!(klass->nested_in && strstr (klass->nested_in->name, "<PrivateImplementationDetails>") == klass->nested_in->name)) {
  			add_method (acfg, mono_marshal_get_struct_to_ptr (klass));
  			add_method (acfg, mono_marshal_get_ptr_to_struct (klass));
  		}
  	}
  }
  
  static gboolean
  has_type_vars (MonoClass *klass)
  {
  	if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR))
  		return TRUE;
  	if (klass->rank)
  		return has_type_vars (klass->element_class);
  	if (klass->generic_class) {
  		MonoGenericContext *context = &klass->generic_class->context;
  		if (context->class_inst) {
  			int i;
  
  			for (i = 0; i < context->class_inst->type_argc; ++i)
  				if (has_type_vars (mono_class_from_mono_type (context->class_inst->type_argv [i])))
  					return TRUE;
  		}
  	}
  	if (klass->generic_container)
  		return TRUE;
  	return FALSE;
  }
  
  static gboolean
  is_vt_inst (MonoGenericInst *inst)
  {
  	int i;
  
  	for (i = 0; i < inst->type_argc; ++i) {
  		MonoType *t = inst->type_argv [i];
  		if (MONO_TYPE_ISSTRUCT (t) || t->type == MONO_TYPE_VALUETYPE)
  			return TRUE;
  	}
  	return FALSE;
  }
  
  static gboolean
  method_has_type_vars (MonoMethod *method)
  {
  	if (has_type_vars (method->klass))
  		return TRUE;
  
  	if (method->is_inflated) {
  		MonoGenericContext *context = mono_method_get_context (method);
  		if (context->method_inst) {
  			int i;
  
  			for (i = 0; i < context->method_inst->type_argc; ++i)
  				if (has_type_vars (mono_class_from_mono_type (context->method_inst->type_argv [i])))
  					return TRUE;
  		}
  	}
  	return FALSE;
  }
  
  static void add_generic_class_with_depth (MonoAotCompile *acfg, MonoClass *klass, int depth, const char *ref);
  
  static void
  add_generic_class (MonoAotCompile *acfg, MonoClass *klass, gboolean force, const char *ref)
  {
  	/* This might lead to a huge code blowup so only do it if neccesary */
  	if (!acfg->aot_opts.full_aot && !force)
  		return;
  
  	add_generic_class_with_depth (acfg, klass, 0, ref);
  }
  
  static gboolean
  check_type_depth (MonoType *t, int depth)
  {
  	int i;
  
  	if (depth > 8)
  		return TRUE;
  
  	switch (t->type) {
  	case MONO_TYPE_GENERICINST: {
  		MonoGenericClass *gklass = t->data.generic_class;
  		MonoGenericInst *ginst = gklass->context.class_inst;
  
  		if (ginst) {
  			for (i = 0; i < ginst->type_argc; ++i) {
  				if (check_type_depth (ginst->type_argv [i], depth + 1))
  					return TRUE;
  			}
  		}
  		break;
  	}
  	default:
  		break;
  	}
  
  	return FALSE;
  }
  
  static void
  add_types_from_method_header (MonoAotCompile *acfg, MonoMethod *method);
  
  /*
   * add_generic_class:
   *
   *   Add all methods of a generic class.
   */
  static void
  add_generic_class_with_depth (MonoAotCompile *acfg, MonoClass *klass, int depth, const char *ref)
  {
  	MonoMethod *method;
  	MonoClassField *field;
  	gpointer iter;
  	gboolean use_gsharedvt = FALSE;
  
  	if (!acfg->ginst_hash)
  		acfg->ginst_hash = g_hash_table_new (NULL, NULL);
  
  	mono_class_init (klass);
  
  	if (klass->generic_class && klass->generic_class->context.class_inst->is_open)
  		return;
  
  	if (has_type_vars (klass))
  		return;
  
  	if (!klass->generic_class && !klass->rank)
  		return;
  
  	if (klass->exception_type)
  		return;
  
  	if (!acfg->ginst_hash)
  		acfg->ginst_hash = g_hash_table_new (NULL, NULL);
  
  	if (g_hash_table_lookup (acfg->ginst_hash, klass))
  		return;
  
  	if (check_type_depth (&klass->byval_arg, 0))
  		return;
  
  	if (acfg->aot_opts.log_generics)
  		aot_printf (acfg, "%*sAdding generic instance %s [%s].\n", depth, "", mono_type_full_name (&klass->byval_arg), ref);
  
  	g_hash_table_insert (acfg->ginst_hash, klass, klass);
  
  	/*
  	 * Use gsharedvt for generic collections with vtype arguments to avoid code blowup.
  	 * Enable this only for some classes since gsharedvt might not support all methods.
  	 */
  	if ((acfg->opts & MONO_OPT_GSHAREDVT) && klass->image == mono_defaults.corlib && klass->generic_class && klass->generic_class->context.class_inst && is_vt_inst (klass->generic_class->context.class_inst) &&
  		(!strcmp (klass->name, "Dictionary`2") || !strcmp (klass->name, "List`1") || !strcmp (klass->name, "ReadOnlyCollection`1")))
  		use_gsharedvt = TRUE;
  
  	iter = NULL;
  	while ((method = mono_class_get_methods (klass, &iter))) {
  		if ((acfg->opts & MONO_OPT_GSHAREDVT) && method->is_inflated && mono_method_get_context (method)->method_inst) {
  			/*
  			 * This is partial sharing, and we can't handle it yet
  			 */
  			continue;
  		}
  		
  		if (mono_method_is_generic_sharable_full (method, FALSE, FALSE, use_gsharedvt)) {
  			/* Already added */
  			add_types_from_method_header (acfg, method);
  			continue;
  		}
  
  		if (method->is_generic)
  			/* FIXME: */
  			continue;
  
  		/*
  		 * FIXME: Instances which are referenced by these methods are not added,
  		 * for example Array.Resize<int> for List<int>.Add ().
  		 */
  		add_extra_method_with_depth (acfg, method, depth + 1);
  	}
  
  	iter = NULL;
  	while ((field = mono_class_get_fields (klass, &iter))) {
  		if (field->type->type == MONO_TYPE_GENERICINST)
  			add_generic_class_with_depth (acfg, mono_class_from_mono_type (field->type), depth + 1, "field");
  	}
  
  	if (klass->delegate) {
  		method = mono_get_delegate_invoke (klass);
  
  		method = mono_marshal_get_delegate_invoke (method, NULL);
  
  		if (acfg->aot_opts.log_generics)
  			aot_printf (acfg, "%*sAdding method %s.\n", depth, "", mono_method_full_name (method, TRUE));
  
  		add_method (acfg, method);
  	}
  
  	/* Add superclasses */
  	if (klass->parent)
  		add_generic_class_with_depth (acfg, klass->parent, depth, "parent");
  
  	/* 
  	 * For ICollection<T>, add instances of the helper methods
  	 * in Array, since a T[] could be cast to ICollection<T>.
  	 */
  	if (klass->image == mono_defaults.corlib && !strcmp (klass->name_space, "System.Collections.Generic") &&
  		(!strcmp(klass->name, "ICollection`1") || !strcmp (klass->name, "IEnumerable`1") || !strcmp (klass->name, "IList`1") || !strcmp (klass->name, "IEnumerator`1") || !strcmp (klass->name, "IReadOnlyList`1"))) {
  		MonoClass *tclass = mono_class_from_mono_type (klass->generic_class->context.class_inst->type_argv [0]);
  		MonoClass *array_class = mono_bounded_array_class_get (tclass, 1, FALSE);
  		gpointer iter;
  		char *name_prefix;
  
  		if (!strcmp (klass->name, "IEnumerator`1"))
  			name_prefix = g_strdup_printf ("%s.%s", klass->name_space, "IEnumerable`1");
  		else
  			name_prefix = g_strdup_printf ("%s.%s", klass->name_space, klass->name);
  
  		/* Add the T[]/InternalEnumerator class */
  		if (!strcmp (klass->name, "IEnumerable`1") || !strcmp (klass->name, "IEnumerator`1")) {
  			MonoClass *nclass;
  
  			iter = NULL;
  			while ((nclass = mono_class_get_nested_types (array_class->parent, &iter))) {
  				if (!strcmp (nclass->name, "InternalEnumerator`1"))
  					break;
  			}
  			g_assert (nclass);
  			nclass = mono_class_inflate_generic_class (nclass, mono_generic_class_get_context (klass->generic_class));
  			add_generic_class (acfg, nclass, FALSE, "ICollection<T>");
  		}
  
  		iter = NULL;
  		while ((method = mono_class_get_methods (array_class, &iter))) {
  			if (strstr (method->name, name_prefix)) {
  				MonoMethod *m = mono_aot_get_array_helper_from_wrapper (method);
  
  				add_extra_method_with_depth (acfg, m, depth);
  			}
  		}
  
  		g_free (name_prefix);
  	}
  
  	/* Add an instance of GenericComparer<T> which is created dynamically by Comparer<T> */
  	if (klass->image == mono_defaults.corlib && !strcmp (klass->name_space, "System.Collections.Generic") && !strcmp (klass->name, "Comparer`1")) {
  		MonoClass *tclass = mono_class_from_mono_type (klass->generic_class->context.class_inst->type_argv [0]);
  		MonoClass *icomparable, *gcomparer;
  		MonoGenericContext ctx;
  		MonoType *args [16];
  
  		memset (&ctx, 0, sizeof (ctx));
  
  		icomparable = mono_class_from_name (mono_defaults.corlib, "System", "IComparable`1");
  		g_assert (icomparable);
  		args [0] = &tclass->byval_arg;
  		ctx.class_inst = mono_metadata_get_generic_inst (1, args);
  
  		if (mono_class_is_assignable_from (mono_class_inflate_generic_class (icomparable, &ctx), tclass)) {
  			gcomparer = mono_class_from_name (mono_defaults.corlib, "System.Collections.Generic", "GenericComparer`1");
  			g_assert (gcomparer);
  			add_generic_class (acfg, mono_class_inflate_generic_class (gcomparer, &ctx), FALSE, "Comparer<T>");
  		}
  	}
  
  	/* Add an instance of GenericEqualityComparer<T> which is created dynamically by EqualityComparer<T> */
  	if (klass->image == mono_defaults.corlib && !strcmp (klass->name_space, "System.Collections.Generic") && !strcmp (klass->name, "EqualityComparer`1")) {
  		MonoClass *tclass = mono_class_from_mono_type (klass->generic_class->context.class_inst->type_argv [0]);
  		MonoClass *iface, *gcomparer;
  		MonoGenericContext ctx;
  		MonoType *args [16];
  
  		memset (&ctx, 0, sizeof (ctx));
  
  		iface = mono_class_from_name (mono_defaults.corlib, "System", "IEquatable`1");
  		g_assert (iface);
  		args [0] = &tclass->byval_arg;
  		ctx.class_inst = mono_metadata_get_generic_inst (1, args);
  
  		if (mono_class_is_assignable_from (mono_class_inflate_generic_class (iface, &ctx), tclass)) {
  			gcomparer = mono_class_from_name (mono_defaults.corlib, "System.Collections.Generic", "GenericEqualityComparer`1");
  			g_assert (gcomparer);
  			add_generic_class (acfg, mono_class_inflate_generic_class (gcomparer, &ctx), FALSE, "EqualityComparer<T>");
  		}
  	}
  }
  
  static void
  add_instances_of (MonoAotCompile *acfg, MonoClass *klass, MonoType **insts, int ninsts, gboolean force)
  {
  	int i;
  	MonoGenericContext ctx;
  	MonoType *args [16];
  
  	if (acfg->aot_opts.no_instances)
  		return;
  
  	memset (&ctx, 0, sizeof (ctx));
  
  	for (i = 0; i < ninsts; ++i) {
  		args [0] = insts [i];
  		ctx.class_inst = mono_metadata_get_generic_inst (1, args);
  		add_generic_class (acfg, mono_class_inflate_generic_class (klass, &ctx), force, "");
  	}
  }
  
  static void
  add_types_from_method_header (MonoAotCompile *acfg, MonoMethod *method)
  {
  	MonoMethodHeader *header;
  	MonoMethodSignature *sig;
  	int j, depth;
  
  	depth = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_depth, method));
  
  	sig = mono_method_signature (method);
  
  	if (sig) {
  		for (j = 0; j < sig->param_count; ++j)
  			if (sig->params [j]->type == MONO_TYPE_GENERICINST)
  				add_generic_class_with_depth (acfg, mono_class_from_mono_type (sig->params [j]), depth + 1, "arg");
  	}
  
  	header = mono_method_get_header (method);
  
  	if (header) {
  		for (j = 0; j < header->num_locals; ++j)
  			if (header->locals [j]->type == MONO_TYPE_GENERICINST)
  				add_generic_class_with_depth (acfg, mono_class_from_mono_type (header->locals [j]), depth + 1, "local");
  	} else {
  		mono_loader_clear_error ();
  	}
  }
  
  /*
   * add_generic_instances:
   *
   *   Add instances referenced by the METHODSPEC/TYPESPEC table.
   */
  static void
  add_generic_instances (MonoAotCompile *acfg)
  {
  	int i;
  	guint32 token;
  	MonoMethod *method;
  	MonoGenericContext *context;
  
  	if (acfg->aot_opts.no_instances)
  		return;
  
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_METHODSPEC].rows; ++i) {
  		token = MONO_TOKEN_METHOD_SPEC | (i + 1);
  		method = mono_get_method (acfg->image, token, NULL);
  
  		if (!method)
  			continue;
  
  		if (method->klass->image != acfg->image)
  			continue;
  
  		context = mono_method_get_context (method);
  
  		if (context && ((context->class_inst && context->class_inst->is_open)))
  			continue;
  
  		/*
  		 * For open methods, create an instantiation which can be passed to the JIT.
  		 * FIXME: Handle class_inst as well.
  		 */
  		if (context && context->method_inst && context->method_inst->is_open) {
  			MonoGenericContext shared_context;
  			MonoGenericInst *inst;
  			MonoType **type_argv;
  			int i;
  			MonoMethod *declaring_method;
  			gboolean supported = TRUE;
  
  			/* Check that the context doesn't contain open constructed types */
  			if (context->class_inst) {
  				inst = context->class_inst;
  				for (i = 0; i < inst->type_argc; ++i) {
  					if (MONO_TYPE_IS_REFERENCE (inst->type_argv [i]) || inst->type_argv [i]->type == MONO_TYPE_VAR || inst->type_argv [i]->type == MONO_TYPE_MVAR)
  						continue;
  					if (mono_class_is_open_constructed_type (inst->type_argv [i]))
  						supported = FALSE;
  				}
  			}
  			if (context->method_inst) {
  				inst = context->method_inst;
  				for (i = 0; i < inst->type_argc; ++i) {
  					if (MONO_TYPE_IS_REFERENCE (inst->type_argv [i]) || inst->type_argv [i]->type == MONO_TYPE_VAR || inst->type_argv [i]->type == MONO_TYPE_MVAR)
  						continue;
  					if (mono_class_is_open_constructed_type (inst->type_argv [i]))
  						supported = FALSE;
  				}
  			}
  
  			if (!supported)
  				continue;
  
  			memset (&shared_context, 0, sizeof (MonoGenericContext));
  
  			inst = context->class_inst;
  			if (inst) {
  				type_argv = g_new0 (MonoType*, inst->type_argc);
  				for (i = 0; i < inst->type_argc; ++i) {
  					if (MONO_TYPE_IS_REFERENCE (inst->type_argv [i]) || inst->type_argv [i]->type == MONO_TYPE_VAR || inst->type_argv [i]->type == MONO_TYPE_MVAR)
  						type_argv [i] = &mono_defaults.object_class->byval_arg;
  					else
  						type_argv [i] = inst->type_argv [i];
  				}
  				
  				shared_context.class_inst = mono_metadata_get_generic_inst (inst->type_argc, type_argv);
  				g_free (type_argv);
  			}
  
  			inst = context->method_inst;
  			if (inst) {
  				type_argv = g_new0 (MonoType*, inst->type_argc);
  				for (i = 0; i < inst->type_argc; ++i) {
  					if (MONO_TYPE_IS_REFERENCE (inst->type_argv [i]) || inst->type_argv [i]->type == MONO_TYPE_VAR || inst->type_argv [i]->type == MONO_TYPE_MVAR)
  						type_argv [i] = &mono_defaults.object_class->byval_arg;
  					else
  						type_argv [i] = inst->type_argv [i];
  				}
  
  				shared_context.method_inst = mono_metadata_get_generic_inst (inst->type_argc, type_argv);
  				g_free (type_argv);
  			}
  
  			if (method->is_generic || method->klass->generic_container)
  				declaring_method = method;
  			else
  				declaring_method = mono_method_get_declaring_generic_method (method);
  
  			method = mono_class_inflate_generic_method (declaring_method, &shared_context);
  		}
  
  		/* 
  		 * If the method is fully sharable, it was already added in place of its
  		 * generic definition.
  		 */
  		if (mono_method_is_generic_sharable_full (method, FALSE, FALSE, FALSE))
  			continue;
  
  		/*
  		 * FIXME: Partially shared methods are not shared here, so we end up with
  		 * many identical methods.
  		 */
  		add_extra_method (acfg, method);
  	}
  
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPESPEC].rows; ++i) {
  		MonoError error;
  		MonoClass *klass;
  
  		token = MONO_TOKEN_TYPE_SPEC | (i + 1);
  
  		klass = mono_class_get_checked (acfg->image, token, &error);
  		if (!klass || klass->rank) {
  			mono_error_cleanup (&error);
  			continue;
  		}
  
  		add_generic_class (acfg, klass, FALSE, "typespec");
  	}
  
  	/* Add types of args/locals */
  	for (i = 0; i < acfg->methods->len; ++i) {
  		method = g_ptr_array_index (acfg->methods, i);
  		add_types_from_method_header (acfg, method);
  	}
  
  	if (acfg->image == mono_defaults.corlib) {
  		MonoClass *klass;
  		MonoType *insts [256];
  		int ninsts = 0;
  
  		insts [ninsts ++] = &mono_defaults.byte_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.sbyte_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.int16_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.uint16_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.int32_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.uint32_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.int64_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.uint64_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.single_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.double_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.char_class->byval_arg;
  		insts [ninsts ++] = &mono_defaults.boolean_class->byval_arg;
  
  		/* Add GenericComparer<T> instances for primitive types for Enum.ToString () */
  		klass = mono_class_from_name (acfg->image, "System.Collections.Generic", "GenericComparer`1");
  		if (klass)
  			add_instances_of (acfg, klass, insts, ninsts, TRUE);
  		klass = mono_class_from_name (acfg->image, "System.Collections.Generic", "GenericEqualityComparer`1");
  		if (klass)
  			add_instances_of (acfg, klass, insts, ninsts, TRUE);
  
  		/* Add instances of the array generic interfaces for primitive types */
  		/* This will add instances of the InternalArray_ helper methods in Array too */
  		klass = mono_class_from_name (acfg->image, "System.Collections.Generic", "ICollection`1");
  		if (klass)
  			add_instances_of (acfg, klass, insts, ninsts, TRUE);
  		klass = mono_class_from_name (acfg->image, "System.Collections.Generic", "IList`1");
  		if (klass)
  			add_instances_of (acfg, klass, insts, ninsts, TRUE);
  		klass = mono_class_from_name (acfg->image, "System.Collections.Generic", "IEnumerable`1");
  		if (klass)
  			add_instances_of (acfg, klass, insts, ninsts, TRUE);
  
  		/* 
  		 * Add a managed-to-native wrapper of Array.GetGenericValueImpl<object>, which is
  		 * used for all instances of GetGenericValueImpl by the AOT runtime.
  		 */
  		{
  			MonoGenericContext ctx;
  			MonoType *args [16];
  			MonoMethod *get_method;
  			MonoClass *array_klass = mono_array_class_get (mono_defaults.object_class, 1)->parent;
  
  			get_method = mono_class_get_method_from_name (array_klass, "GetGenericValueImpl", 2);
  
  			if (get_method) {
  				memset (&ctx, 0, sizeof (ctx));
  				args [0] = &mono_defaults.object_class->byval_arg;
  				ctx.method_inst = mono_metadata_get_generic_inst (1, args);
  				add_extra_method (acfg, mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (get_method, &ctx), TRUE, TRUE));
  			}
  		}
  
  		/* Same for CompareExchange<T>/Exchange<T> */
  		{
  			MonoGenericContext ctx;
  			MonoType *args [16];
  			MonoMethod *m;
  			MonoClass *interlocked_klass = mono_class_from_name (mono_defaults.corlib, "System.Threading", "Interlocked");
  			gpointer iter = NULL;
  
  			while ((m = mono_class_get_methods (interlocked_klass, &iter))) {
  				if ((!strcmp (m->name, "CompareExchange") || !strcmp (m->name, "Exchange")) && m->is_generic) {
  					memset (&ctx, 0, sizeof (ctx));
  					args [0] = &mono_defaults.object_class->byval_arg;
  					ctx.method_inst = mono_metadata_get_generic_inst (1, args);
  					add_extra_method (acfg, mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (m, &ctx), TRUE, TRUE));
  				}
  			}
  		}
  
  		/* Same for Volatile.Read/Write<T> */
  		{
  			MonoGenericContext ctx;
  			MonoType *args [16];
  			MonoMethod *m;
  			MonoClass *volatile_klass = mono_class_from_name (mono_defaults.corlib, "System.Threading", "Volatile");
  			gpointer iter = NULL;
  
  			if (volatile_klass) {
  				while ((m = mono_class_get_methods (volatile_klass, &iter))) {
  					if ((!strcmp (m->name, "Read") || !strcmp (m->name, "Write")) && m->is_generic) {
  						memset (&ctx, 0, sizeof (ctx));
  						args [0] = &mono_defaults.object_class->byval_arg;
  						ctx.method_inst = mono_metadata_get_generic_inst (1, args);
  						add_extra_method (acfg, mono_marshal_get_native_wrapper (mono_class_inflate_generic_method (m, &ctx), TRUE, TRUE));
  					}
  				}
  			}
  		}
  	}
  }
  
  /*
   * is_direct_callable:
   *
   *   Return whenever the method identified by JI is directly callable without 
   * going through the PLT.
   */
  static gboolean
  is_direct_callable (MonoAotCompile *acfg, MonoMethod *method, MonoJumpInfo *patch_info)
  {
  	if ((patch_info->type == MONO_PATCH_INFO_METHOD) && (patch_info->data.method->klass->image == acfg->image)) {
  		MonoCompile *callee_cfg = g_hash_table_lookup (acfg->method_to_cfg, patch_info->data.method);
  		if (callee_cfg) {
  			gboolean direct_callable = TRUE;
  
  			if (direct_callable && !(!callee_cfg->has_got_slots && (callee_cfg->method->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT)))
  				direct_callable = FALSE;
  			if ((callee_cfg->method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) && (!method || method->wrapper_type != MONO_WRAPPER_SYNCHRONIZED))
  				// FIXME: Maybe call the wrapper directly ?
  				direct_callable = FALSE;
  
  			if (acfg->aot_opts.soft_debug || acfg->aot_opts.no_direct_calls) {
  				/* Disable this so all calls go through load_method (), see the
  				 * mini_get_debug_options ()->load_aot_jit_info_eagerly = TRUE; line in
  				 * mono_debugger_agent_init ().
  				 */
  				direct_callable = FALSE;
  			}
  
  			if (callee_cfg->method->wrapper_type == MONO_WRAPPER_ALLOC)
  				/* sgen does some initialization when the allocator method is created */
  				direct_callable = FALSE;
  
  			if (direct_callable)
  				return TRUE;
  		}
  	} else if ((patch_info->type == MONO_PATCH_INFO_ICALL_ADDR && patch_info->data.method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
  		if (acfg->aot_opts.direct_pinvoke)
  			return TRUE;
  	} else if (patch_info->type == MONO_PATCH_INFO_ICALL_ADDR) {
  		if (acfg->aot_opts.direct_icalls)
  			return TRUE;
  		return FALSE;
  	}
  
  	return FALSE;
  }
  
  #ifdef MONO_ARCH_AOT_SUPPORTED
  static const char *
  get_pinvoke_import (MonoAotCompile *acfg, MonoMethod *method)
  {
  	MonoImage *image = method->klass->image;
  	MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *) method;
  	MonoTableInfo *tables = image->tables;
  	MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
  	MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
  	guint32 im_cols [MONO_IMPLMAP_SIZE];
  	char *import;
  
  	import = g_hash_table_lookup (acfg->method_to_pinvoke_import, method);
  	if (import != NULL)
  		return import;
  
  	if (!piinfo->implmap_idx || piinfo->implmap_idx > im->rows)
  		return NULL;
  
  	mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
  
  	if (!im_cols [MONO_IMPLMAP_SCOPE] || im_cols [MONO_IMPLMAP_SCOPE] > mr->rows)
  		return NULL;
  
  	import = g_strdup_printf ("%s", mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]));
  
  	g_hash_table_insert (acfg->method_to_pinvoke_import, method, import);
  	
  	return import;
  }
  #endif
  
  static gint
  compare_lne (MonoDebugLineNumberEntry *a, MonoDebugLineNumberEntry *b)
  {
  	if (a->native_offset == b->native_offset)
  		return a->il_offset - b->il_offset;
  	else
  		return a->native_offset - b->native_offset;
  }
  
  /*
   * compute_line_numbers:
   *
   * Returns a sparse array of size CODE_SIZE containing MonoDebugSourceLocation* entries for the native offsets which have a corresponding line number
   * entry.
   */
  static MonoDebugSourceLocation**
  compute_line_numbers (MonoMethod *method, int code_size, MonoDebugMethodJitInfo *debug_info)
  {
  	MonoDebugMethodInfo *minfo;
  	MonoDebugLineNumberEntry *ln_array;
  	MonoDebugSourceLocation *loc;
  	int i, prev_line, prev_il_offset;
  	int *native_to_il_offset = NULL;
  	MonoDebugSourceLocation **res;
  	gboolean first;
  
  	minfo = mono_debug_lookup_method (method);
  	if (!minfo)
  		return NULL;
  	// FIXME: This seems to happen when two methods have the same cfg->method_to_register
  	if (debug_info->code_size != code_size)
  		return NULL;
  
  	g_assert (code_size);
  
  	/* Compute the native->IL offset mapping */
  
  	ln_array = g_new0 (MonoDebugLineNumberEntry, debug_info->num_line_numbers);
  	memcpy (ln_array, debug_info->line_numbers, debug_info->num_line_numbers * sizeof (MonoDebugLineNumberEntry));
  
  	qsort (ln_array, debug_info->num_line_numbers, sizeof (MonoDebugLineNumberEntry), (gpointer)compare_lne);
  
  	native_to_il_offset = g_new0 (int, code_size + 1);
  
  	for (i = 0; i < debug_info->num_line_numbers; ++i) {
  		int j;
  		MonoDebugLineNumberEntry *lne = &ln_array [i];
  
  		if (i == 0) {
  			for (j = 0; j < lne->native_offset; ++j)
  				native_to_il_offset [j] = -1;
  		}
  
  		if (i < debug_info->num_line_numbers - 1) {
  			MonoDebugLineNumberEntry *lne_next = &ln_array [i + 1];
  
  			for (j = lne->native_offset; j < lne_next->native_offset; ++j)
  				native_to_il_offset [j] = lne->il_offset;
  		} else {
  			for (j = lne->native_offset; j < code_size; ++j)
  				native_to_il_offset [j] = lne->il_offset;
  		}
  	}
  	g_free (ln_array);
  
  	/* Compute the native->line number mapping */
  	res = g_new0 (MonoDebugSourceLocation*, code_size);
  	prev_il_offset = -1;
  	prev_line = -1;
  	first = TRUE;
  	for (i = 0; i < code_size; ++i) {
  		int il_offset = native_to_il_offset [i];
  
  		if (il_offset == -1 || il_offset == prev_il_offset)
  			continue;
  		prev_il_offset = il_offset;
  		loc = mono_debug_symfile_lookup_location (minfo, il_offset);
  		if (!(loc && loc->source_file))
  			continue;
  		if (loc->row == prev_line) {
  			mono_debug_symfile_free_location (loc);
  			continue;
  		}
  		prev_line = loc->row;
  		//printf ("D: %s:%d il=%x native=%x\n", loc->source_file, loc->row, il_offset, i);
  		if (first)
  			/* This will cover the prolog too */
  			res [0] = loc;
  		else
  			res [i] = loc;
  		first = FALSE;
  	}
  	return res;
  }
  
  static int
  get_file_index (MonoAotCompile *acfg, const char *source_file)
  {
  	int findex;
  
  	// FIXME: Free these
  	if (!acfg->dwarf_ln_filenames)
  		acfg->dwarf_ln_filenames = g_hash_table_new (g_str_hash, g_str_equal);
  	findex = GPOINTER_TO_INT (g_hash_table_lookup (acfg->dwarf_ln_filenames, source_file));
  	if (!findex) {
  		findex = g_hash_table_size (acfg->dwarf_ln_filenames) + 1;
  		g_hash_table_insert (acfg->dwarf_ln_filenames, g_strdup (source_file), GINT_TO_POINTER (findex));
  		emit_unset_mode (acfg);
  		fprintf (acfg->fp, ".file %d \"%s\"\n", findex, mono_dwarf_escape_path (source_file));
  	}
  	return findex;
  }
  
  #ifdef TARGET_ARM64
  #define INST_LEN 4
  #else
  #define INST_LEN 1
  #endif
  
  /*
   * emit_and_reloc_code:
   *
   *   Emit the native code in CODE, handling relocations along the way. If GOT_ONLY
   * is true, calls are made through the GOT too. This is used for emitting trampolines
   * in full-aot mode, since calls made from trampolines couldn't go through the PLT,
   * since trampolines are needed to make PTL work.
   */
  static void
  emit_and_reloc_code (MonoAotCompile *acfg, MonoMethod *method, guint8 *code, guint32 code_len, MonoJumpInfo *relocs, gboolean got_only, MonoDebugMethodJitInfo *debug_info)
  {
  	int i, pindex, start_index, method_index;
  	GPtrArray *patches;
  	MonoJumpInfo *patch_info;
  	MonoMethodHeader *header;
  	MonoDebugSourceLocation **locs = NULL;
  	gboolean skip;
  #ifdef MONO_ARCH_AOT_SUPPORTED
  	gboolean direct_call, external_call;
  	guint32 got_slot;
  	const char *direct_call_target = 0;
  	const char *direct_pinvoke;
  #endif
  
  	if (method) {
  		header = mono_method_get_header (method);
  
  		method_index = get_method_index (acfg, method);
  	}
  
  	if (acfg->gas_line_numbers && method && debug_info) {
  		locs = compute_line_numbers (method, code_len, debug_info);
  		if (!locs) {
  			int findex = get_file_index (acfg, "<unknown>");
  			emit_unset_mode (acfg);
  			fprintf (acfg->fp, ".loc %d %d 0\n", findex, 1);
  		}
  	}
  
  	/* Collect and sort relocations */
  	patches = g_ptr_array_new ();
  	for (patch_info = relocs; patch_info; patch_info = patch_info->next)
  		g_ptr_array_add (patches, patch_info);
  	g_ptr_array_sort (patches, compare_patches);
  
  	start_index = 0;
  	for (i = 0; i < code_len; i += INST_LEN) {
  		patch_info = NULL;
  		for (pindex = start_index; pindex < patches->len; ++pindex) {
  			patch_info = g_ptr_array_index (patches, pindex);
  			if (patch_info->ip.i >= i)
  				break;
  		}
  
  		if (locs && locs [i]) {
  			MonoDebugSourceLocation *loc = locs [i];
  			int findex;
  
  			findex = get_file_index (acfg, loc->source_file);
  			emit_unset_mode (acfg);
  			fprintf (acfg->fp, ".loc %d %d 0\n", findex, loc->row);
  			mono_debug_symfile_free_location (loc);
  		}
  
  		skip = FALSE;
  #ifdef MONO_ARCH_AOT_SUPPORTED
  		if (patch_info && (patch_info->ip.i == i) && (pindex < patches->len)) {
  			start_index = pindex;
  
  			switch (patch_info->type) {
  			case MONO_PATCH_INFO_NONE:
  				break;
  			case MONO_PATCH_INFO_GOT_OFFSET: {
  				int code_size;
   
  				arch_emit_got_offset (acfg, code + i, &code_size);
  				i += code_size - INST_LEN;
  				skip = TRUE;
  				patch_info->type = MONO_PATCH_INFO_NONE;
  				break;
  			}
  			case MONO_PATCH_INFO_OBJC_SELECTOR_REF: {
  				int code_size, index;
  				char *selector = (void*)patch_info->data.target;
  
  				if (!acfg->objc_selector_to_index)
  					acfg->objc_selector_to_index = g_hash_table_new (g_str_hash, g_str_equal);
  				if (!acfg->objc_selectors)
  					acfg->objc_selectors = g_ptr_array_new ();
  				index = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->objc_selector_to_index, selector));
  				if (index)
  					index --;
  				else {
  					index = acfg->objc_selector_index;
  					g_ptr_array_add (acfg->objc_selectors, (void*)patch_info->data.target);
  					g_hash_table_insert (acfg->objc_selector_to_index, selector, GUINT_TO_POINTER (index + 1));
  					acfg->objc_selector_index ++;
  				}
  
  				arch_emit_objc_selector_ref (acfg, code + i, index, &code_size);
  				i += code_size - INST_LEN;
  				skip = TRUE;
  				patch_info->type = MONO_PATCH_INFO_NONE;
  				break;
  			}
  			default: {
  				/*
  				 * If this patch is a call, try emitting a direct call instead of
  				 * through a PLT entry. This is possible if the called method is in
  				 * the same assembly and requires no initialization.
  				 */
  				direct_call = FALSE;
  				external_call = FALSE;
  				if ((patch_info->type == MONO_PATCH_INFO_METHOD) && (patch_info->data.method->klass->image == acfg->image)) {
  					if (!got_only && is_direct_callable (acfg, method, patch_info)) {
  						MonoCompile *callee_cfg = g_hash_table_lookup (acfg->method_to_cfg, patch_info->data.method);
  						//printf ("DIRECT: %s %s\n", method ? mono_method_full_name (method, TRUE) : "", mono_method_full_name (callee_cfg->method, TRUE));
  						direct_call = TRUE;
  						direct_call_target = callee_cfg->asm_symbol;
  						patch_info->type = MONO_PATCH_INFO_NONE;
  						acfg->stats.direct_calls ++;
  					}
  
  					acfg->stats.all_calls ++;
  				} else if (patch_info->type == MONO_PATCH_INFO_ICALL_ADDR) {
  					if (!got_only && is_direct_callable (acfg, method, patch_info)) {
  						if (!(patch_info->data.method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
  							direct_pinvoke = mono_lookup_icall_symbol (patch_info->data.method);
  						else
  							direct_pinvoke = get_pinvoke_import (acfg, patch_info->data.method);
  						if (direct_pinvoke) {
  							direct_call = TRUE;
  							g_assert (strlen (direct_pinvoke) < 1000);
  							direct_call_target = g_strdup_printf ("%s%s", acfg->user_symbol_prefix, direct_pinvoke);
  						}
  					}
  				} else if (patch_info->type == MONO_PATCH_INFO_JIT_ICALL_ADDR) {
  					const char *sym = mono_lookup_jit_icall_symbol (patch_info->data.name);
  					if (!got_only && sym && acfg->aot_opts.direct_icalls) {
  						/* Call to a C function implementing a jit icall */
  						direct_call = TRUE;
  						external_call = TRUE;
  						g_assert (strlen (sym) < 1000);
  						direct_call_target = g_strdup_printf ("%s%s", acfg->user_symbol_prefix, sym);
  					}
  				} else if (patch_info->type == MONO_PATCH_INFO_INTERNAL_METHOD) {
  					MonoJitICallInfo *info = mono_find_jit_icall_by_name (patch_info->data.name);
  					const char *sym = mono_lookup_jit_icall_symbol (patch_info->data.name);
  					if (!got_only && sym && acfg->aot_opts.direct_icalls && info->func == info->wrapper) {
  						/* Call to a jit icall without a wrapper */
  						direct_call = TRUE;
  						external_call = TRUE;
  						g_assert (strlen (sym) < 1000);
  						direct_call_target = g_strdup_printf ("%s%s", acfg->user_symbol_prefix, sym);
  					}
  				}
  
  				if (direct_call) {
  					patch_info->type = MONO_PATCH_INFO_NONE;
  					acfg->stats.direct_calls ++;
  				}
  
  				if (!got_only && !direct_call) {
  					MonoPltEntry *plt_entry = get_plt_entry (acfg, patch_info);
  					if (plt_entry) {
  						/* This patch has a PLT entry, so we must emit a call to the PLT entry */
  						direct_call = TRUE;
  						direct_call_target = plt_entry->symbol;
  		
  						/* Nullify the patch */
  						patch_info->type = MONO_PATCH_INFO_NONE;
  						plt_entry->jit_used = TRUE;
  					}
  				}
  
  				if (direct_call) {
  					int call_size;
  
  					arch_emit_direct_call (acfg, direct_call_target, external_call, FALSE, patch_info, &call_size);
  					i += call_size - INST_LEN;
  				} else {
  					int code_size;
  
  					got_slot = get_got_offset (acfg, patch_info);
  
  					arch_emit_got_access (acfg, code + i, got_slot, &code_size);
  					i += code_size - INST_LEN;
  				}
  				skip = TRUE;
  			}
  			}
  		}
  #endif /* MONO_ARCH_AOT_SUPPORTED */
  
  		if (!skip) {
  			/* Find next patch */
  			patch_info = NULL;
  			for (pindex = start_index; pindex < patches->len; ++pindex) {
  				patch_info = g_ptr_array_index (patches, pindex);
  				if (patch_info->ip.i >= i)
  					break;
  			}
  
  			/* Try to emit multiple bytes at once */
  			if (pindex < patches->len && patch_info->ip.i > i) {
  				int limit;
  
  				for (limit = i + INST_LEN; limit < patch_info->ip.i; limit += INST_LEN) {
  					if (locs && locs [limit])
  						break;
  				}
  
  				emit_code_bytes (acfg, code + i, limit - i);
  				i = limit - INST_LEN;
  			} else {
  				emit_code_bytes (acfg, code + i, INST_LEN);
  			}
  		}
  	}
  
  	g_free (locs);
  }
  
  /*
   * sanitize_symbol:
   *
   *   Return a modified version of S which only includes characters permissible in symbols.
   */
  static char*
  sanitize_symbol (MonoAotCompile *acfg, char *s)
  {
  	gboolean process = FALSE;
  	int i, len;
  	GString *gs;
  	char *res;
  
  	if (!s)
  		return s;
  
  	len = strlen (s);
  	for (i = 0; i < len; ++i)
  		if (!(s [i] <= 0x7f && (isalnum (s [i]) || s [i] == '_')))
  			process = TRUE;
  	if (!process)
  		return s;
  
  	gs = g_string_sized_new (len);
  	for (i = 0; i < len; ++i) {
  		guint8 c = s [i];
  		if (c <= 0x7f && (isalnum (c) || c == '_')) {
  			g_string_append_c (gs, c);
  		} else if (c > 0x7f) {
  			/* multi-byte utf8 */
  			g_string_append_printf (gs, "_0x%x", c);
  			i ++;
  			c = s [i];
  			while (c >> 6 == 0x2) {
  				g_string_append_printf (gs, "%x", c);
  				i ++;
  				c = s [i];
  			}
  			g_string_append_printf (gs, "_");
  			i --;
  		} else {
  			g_string_append_c (gs, '_');
  		}
  	}
  
  	res = mono_mempool_strdup (acfg->mempool, gs->str);
  	g_string_free (gs, TRUE);
  	return res;
  }
  
  static char*
  get_debug_sym (MonoMethod *method, const char *prefix, GHashTable *cache)
  {
  	char *name1, *name2, *cached;
  	int i, j, len, count;
  
  	name1 = mono_method_full_name (method, TRUE);
  
  #ifdef TARGET_MACH
  	// This is so that we don't accidentally create a local symbol (which starts with 'L')
  	if ((!prefix || !*prefix) && name1 [0] == 'L')
  		prefix = "_";
  #endif
  
  	len = strlen (name1);
  	name2 = malloc (strlen (prefix) + len + 16);
  	memcpy (name2, prefix, strlen (prefix));
  	j = strlen (prefix);
  	for (i = 0; i < len; ++i) {
  		if (isalnum (name1 [i])) {
  			name2 [j ++] = name1 [i];
  		} else if (name1 [i] == ' ' && name1 [i + 1] == '(' && name1 [i + 2] == ')') {
  			i += 2;
  		} else if (name1 [i] == ',' && name1 [i + 1] == ' ') {
  			name2 [j ++] = '_';
  			i++;
  		} else if (name1 [i] == '(' || name1 [i] == ')' || name1 [i] == '>') {
  		} else
  			name2 [j ++] = '_';
  	}
  	name2 [j] = '\0';
  
  	g_free (name1);
  
  	count = 0;
  	while (g_hash_table_lookup (cache, name2)) {
  		sprintf (name2 + j, "_%d", count);
  		count ++;
  	}
  
  	cached = g_strdup (name2);
  	g_hash_table_insert (cache, cached, cached);
  
  	return name2;
  }
  
  static void
  emit_method_code (MonoAotCompile *acfg, MonoCompile *cfg)
  {
  	MonoMethod *method;
  	int method_index;
  	guint8 *code;
  	char *debug_sym = NULL;
  	char *symbol = NULL;
  	int func_alignment = AOT_FUNC_ALIGNMENT;
  	MonoMethodHeader *header;
  	char *export_name;
  
  	method = cfg->orig_method;
  	code = cfg->native_code;
  	header = cfg->header;
  
  	method_index = get_method_index (acfg, method);
  	symbol = g_strdup_printf ("%sme_%x", acfg->temp_prefix, method_index);
  
  
  	/* Make the labels local */
  	emit_section_change (acfg, ".text", 0);
  	emit_alignment (acfg, func_alignment);
  	
  	if (acfg->global_symbols && acfg->need_no_dead_strip)
  		fprintf (acfg->fp, "	.no_dead_strip %s\n", cfg->asm_symbol);
  	
  	emit_label (acfg, cfg->asm_symbol);
  
  	if (acfg->aot_opts.write_symbols && !acfg->global_symbols) {
  		/* 
  		 * Write a C style symbol for every method, this has two uses:
  		 * - it works on platforms where the dwarf debugging info is not
  		 *   yet supported.
  		 * - it allows the setting of breakpoints of aot-ed methods.
  		 */
  		debug_sym = get_debug_sym (method, "", acfg->method_label_hash);
  
  		if (acfg->need_no_dead_strip)
  			fprintf (acfg->fp, "	.no_dead_strip %s\n", debug_sym);
  		emit_local_symbol (acfg, debug_sym, symbol, TRUE);
  		emit_label (acfg, debug_sym);
  	}
  
  	export_name = g_hash_table_lookup (acfg->export_names, method);
  	if (export_name) {
  		/* Emit a global symbol for the method */
  		emit_global_inner (acfg, export_name, TRUE);
  		emit_label (acfg, export_name);
  	}
  
  	if (cfg->verbose_level > 0)
  		g_print ("Method %s emitted as %s\n", mono_method_full_name (method, TRUE), cfg->asm_symbol);
  
  	acfg->stats.code_size += cfg->code_len;
  
  	acfg->cfgs [method_index]->got_offset = acfg->got_offset;
  
  	emit_and_reloc_code (acfg, method, code, cfg->code_len, cfg->patch_info, FALSE, mono_debug_find_method (cfg->jit_info->d.method, mono_domain_get ()));
  
  	emit_line (acfg);
  
  	if (acfg->aot_opts.write_symbols) {
  		emit_symbol_size (acfg, debug_sym, ".");
  		g_free (debug_sym);
  	}
  
  	emit_label (acfg, symbol);
  	g_free (symbol);
  }
  
  /**
   * encode_patch:
   *
   *  Encode PATCH_INFO into its disk representation.
   */
  static void
  encode_patch (MonoAotCompile *acfg, MonoJumpInfo *patch_info, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  
  	switch (patch_info->type) {
  	case MONO_PATCH_INFO_NONE:
  		break;
  	case MONO_PATCH_INFO_IMAGE:
  		encode_value (get_image_index (acfg, patch_info->data.image), p, &p);
  		break;
  	case MONO_PATCH_INFO_MSCORLIB_GOT_ADDR:
  	case MONO_PATCH_INFO_JIT_TLS_ID:
  	case MONO_PATCH_INFO_GC_CARD_TABLE_ADDR:
  		break;
  	case MONO_PATCH_INFO_CASTCLASS_CACHE:
  		encode_value (patch_info->data.index, p, &p);
  		break;
  	case MONO_PATCH_INFO_METHOD_REL:
  		encode_value ((gint)patch_info->data.offset, p, &p);
  		break;
  	case MONO_PATCH_INFO_SWITCH: {
  		gpointer *table = (gpointer *)patch_info->data.table->table;
  		int k;
  
  		encode_value (patch_info->data.table->table_size, p, &p);
  		for (k = 0; k < patch_info->data.table->table_size; k++)
  			encode_value ((int)(gssize)table [k], p, &p);
  		break;
  	}
  	case MONO_PATCH_INFO_METHODCONST:
  	case MONO_PATCH_INFO_METHOD:
  	case MONO_PATCH_INFO_METHOD_JUMP:
  	case MONO_PATCH_INFO_ICALL_ADDR:
  	case MONO_PATCH_INFO_METHOD_RGCTX:
  	case MONO_PATCH_INFO_METHOD_CODE_SLOT:
  		encode_method_ref (acfg, patch_info->data.method, p, &p);
  		break;
  	case MONO_PATCH_INFO_INTERNAL_METHOD:
  	case MONO_PATCH_INFO_JIT_ICALL_ADDR: {
  		guint32 len = strlen (patch_info->data.name);
  
  		encode_value (len, p, &p);
  
  		memcpy (p, patch_info->data.name, len);
  		p += len;
  		*p++ = '\0';
  		break;
  	}
  	case MONO_PATCH_INFO_LDSTR: {
  		guint32 image_index = get_image_index (acfg, patch_info->data.token->image);
  		guint32 token = patch_info->data.token->token;
  		g_assert (mono_metadata_token_code (token) == MONO_TOKEN_STRING);
  		encode_value (image_index, p, &p);
  		encode_value (patch_info->data.token->token - MONO_TOKEN_STRING, p, &p);
  		break;
  	}
  	case MONO_PATCH_INFO_RVA:
  	case MONO_PATCH_INFO_DECLSEC:
  	case MONO_PATCH_INFO_LDTOKEN:
  	case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
  		encode_value (get_image_index (acfg, patch_info->data.token->image), p, &p);
  		encode_value (patch_info->data.token->token, p, &p);
  		encode_value (patch_info->data.token->has_context, p, &p);
  		if (patch_info->data.token->has_context)
  			encode_generic_context (acfg, &patch_info->data.token->context, p, &p);
  		break;
  	case MONO_PATCH_INFO_EXC_NAME: {
  		MonoClass *ex_class;
  
  		ex_class =
  			mono_class_from_name (mono_defaults.exception_class->image,
  								  "System", patch_info->data.target);
  		g_assert (ex_class);
  		encode_klass_ref (acfg, ex_class, p, &p);
  		break;
  	}
  	case MONO_PATCH_INFO_R4:
  		encode_value (*((guint32 *)patch_info->data.target), p, &p);
  		break;
  	case MONO_PATCH_INFO_R8:
  		encode_value (((guint32 *)patch_info->data.target) [MINI_LS_WORD_IDX], p, &p);
  		encode_value (((guint32 *)patch_info->data.target) [MINI_MS_WORD_IDX], p, &p);
  		break;
  	case MONO_PATCH_INFO_VTABLE:
  	case MONO_PATCH_INFO_CLASS:
  	case MONO_PATCH_INFO_IID:
  	case MONO_PATCH_INFO_ADJUSTED_IID:
  	case MONO_PATCH_INFO_CLASS_INIT:
  		encode_klass_ref (acfg, patch_info->data.klass, p, &p);
  		break;
  	case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE:
  		encode_klass_ref (acfg, patch_info->data.del_tramp->klass, p, &p);
  		if (patch_info->data.del_tramp->method) {
  			encode_value (1, p, &p);
  			encode_method_ref (acfg, patch_info->data.del_tramp->method, p, &p);
  		} else {
  			encode_value (0, p, &p);
  		}
  		encode_value (patch_info->data.del_tramp->virtual, p, &p);
  		break;
  	case MONO_PATCH_INFO_FIELD:
  	case MONO_PATCH_INFO_SFLDA:
  		encode_field_info (acfg, patch_info->data.field, p, &p);
  		break;
  	case MONO_PATCH_INFO_INTERRUPTION_REQUEST_FLAG:
  		break;
  	case MONO_PATCH_INFO_RGCTX_FETCH: {
  		MonoJumpInfoRgctxEntry *entry = patch_info->data.rgctx_entry;
  		guint32 offset;
  		guint8 *buf2, *p2;
  
  		/* 
  		 * entry->method has a lenghtly encoding and multiple rgctx_fetch entries
  		 * reference the same method, so encode the method only once.
  		 */
  		offset = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_blob_hash, entry->method));
  		if (!offset) {
  			buf2 = g_malloc (1024);
  			p2 = buf2;
  
  			encode_method_ref (acfg, entry->method, p2, &p2);
  			g_assert (p2 - buf2 < 1024);
  
  			offset = add_to_blob (acfg, buf2, p2 - buf2);
  			g_free (buf2);
  
  			g_hash_table_insert (acfg->method_blob_hash, entry->method, GUINT_TO_POINTER (offset + 1));
  		} else {
  			offset --;
  		}
  
  		encode_value (offset, p, &p);
  		g_assert ((int)entry->info_type < 256);
  		g_assert (entry->data->type < 256);
  		encode_value ((entry->in_mrgctx ? 1 : 0) | (entry->info_type << 1) | (entry->data->type << 9), p, &p);
  		encode_patch (acfg, entry->data, p, &p);
  		break;
  	}
  	case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
  	case MONO_PATCH_INFO_MONITOR_ENTER:
  	case MONO_PATCH_INFO_MONITOR_EXIT:
  	case MONO_PATCH_INFO_SEQ_POINT_INFO:
  		break;
  	case MONO_PATCH_INFO_LLVM_IMT_TRAMPOLINE:
  		encode_method_ref (acfg, patch_info->data.imt_tramp->method, p, &p);
  		encode_value (patch_info->data.imt_tramp->vt_offset, p, &p);
  		break;
  	case MONO_PATCH_INFO_SIGNATURE:
  		encode_signature (acfg, (MonoMethodSignature*)patch_info->data.target, p, &p);
  		break;
  	case MONO_PATCH_INFO_TLS_OFFSET:
  		encode_value (GPOINTER_TO_INT (patch_info->data.target), p, &p);
  		break;
  	case MONO_PATCH_INFO_GSHAREDVT_CALL:
  		encode_signature (acfg, (MonoMethodSignature*)patch_info->data.gsharedvt->sig, p, &p);
  		encode_method_ref (acfg, patch_info->data.gsharedvt->method, p, &p);
  		break;
  	case MONO_PATCH_INFO_GSHAREDVT_METHOD: {
  		MonoGSharedVtMethodInfo *info = patch_info->data.gsharedvt_method;
  		int i;
  
  		encode_method_ref (acfg, info->method, p, &p);
  		encode_value (info->num_entries, p, &p);
  		for (i = 0; i < info->num_entries; ++i) {
  			MonoRuntimeGenericContextInfoTemplate *template = &info->entries [i];
  
  			encode_value (template->info_type, p, &p);
  			switch (mini_rgctx_info_type_to_patch_info_type (template->info_type)) {
  			case MONO_PATCH_INFO_CLASS:
  				encode_klass_ref (acfg, mono_class_from_mono_type (template->data), p, &p);
  				break;
  			case MONO_PATCH_INFO_FIELD:
  				encode_field_info (acfg, template->data, p, &p);
  				break;
  			default:
  				g_assert_not_reached ();
  				break;
  			}
  		}
  		break;
  	}
  	default:
  		g_warning ("unable to handle jump info %d", patch_info->type);
  		g_assert_not_reached ();
  	}
  
  	*endbuf = p;
  }
  
  static void
  encode_patch_list (MonoAotCompile *acfg, GPtrArray *patches, int n_patches, int first_got_offset, guint8 *buf, guint8 **endbuf)
  {
  	guint8 *p = buf;
  	guint32 pindex, offset;
  	MonoJumpInfo *patch_info;
  
  	encode_value (n_patches, p, &p);
  
  	for (pindex = 0; pindex < patches->len; ++pindex) {
  		patch_info = g_ptr_array_index (patches, pindex);
  
  		if (patch_info->type == MONO_PATCH_INFO_NONE || patch_info->type == MONO_PATCH_INFO_BB)
  			/* Nothing to do */
  			continue;
  
  		offset = get_got_offset (acfg, patch_info);
  		encode_value (offset, p, &p);
  	}
  
  	*endbuf = p;
  }
  
  static void
  emit_method_info (MonoAotCompile *acfg, MonoCompile *cfg)
  {
  	MonoMethod *method;
  	GList *l;
  	int pindex, buf_size, n_patches;
  	GPtrArray *patches;
  	MonoJumpInfo *patch_info;
  	MonoMethodHeader *header;
  	guint32 method_index;
  	guint8 *p, *buf;
  	guint32 first_got_offset;
  
  	method = cfg->orig_method;
  	header = mono_method_get_header (method);
  
  	method_index = get_method_index (acfg, method);
  
  	/* Sort relocations */
  	patches = g_ptr_array_new ();
  	for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next)
  		g_ptr_array_add (patches, patch_info);
  	g_ptr_array_sort (patches, compare_patches);
  
  	first_got_offset = acfg->cfgs [method_index]->got_offset;
  
  	/**********************/
  	/* Encode method info */
  	/**********************/
  
  	buf_size = (patches->len < 1000) ? 40960 : 40960 + (patches->len * 64);
  	p = buf = g_malloc (buf_size);
  
  	if (mono_class_get_cctor (method->klass))
  		encode_klass_ref (acfg, method->klass, p, &p);
  	else
  		/* Not needed when loading the method */
  		encode_value (0, p, &p);
  
  	/* String table */
  	if (cfg->opt & MONO_OPT_SHARED) {
  		encode_value (g_list_length (cfg->ldstr_list), p, &p);
  		for (l = cfg->ldstr_list; l; l = l->next) {
  			encode_value ((long)l->data, p, &p);
  		}
  	}
  	else
  		/* Used only in shared mode */
  		g_assert (!cfg->ldstr_list);
  
  	n_patches = 0;
  	for (pindex = 0; pindex < patches->len; ++pindex) {
  		patch_info = g_ptr_array_index (patches, pindex);
  		
  		if ((patch_info->type == MONO_PATCH_INFO_GOT_OFFSET) ||
  			(patch_info->type == MONO_PATCH_INFO_NONE)) {
  			patch_info->type = MONO_PATCH_INFO_NONE;
  			/* Nothing to do */
  			continue;
  		}
  
  		if ((patch_info->type == MONO_PATCH_INFO_IMAGE) && (patch_info->data.image == acfg->image)) {
  			/* Stored in a GOT slot initialized at module load time */
  			patch_info->type = MONO_PATCH_INFO_NONE;
  			continue;
  		}
  
  		if (patch_info->type == MONO_PATCH_INFO_GC_CARD_TABLE_ADDR) {
  			/* Stored in a GOT slot initialized at module load time */
  			patch_info->type = MONO_PATCH_INFO_NONE;
  			continue;
  		}
  
  		if (is_plt_patch (patch_info)) {
  			/* Calls are made through the PLT */
  			patch_info->type = MONO_PATCH_INFO_NONE;
  			continue;
  		}
  
  		n_patches ++;
  	}
  
  	if (n_patches)
  		g_assert (cfg->has_got_slots);
  
  	encode_patch_list (acfg, patches, n_patches, first_got_offset, p, &p);
  
  	acfg->stats.info_size += p - buf;
  
  	g_assert (p - buf < buf_size);
  
  	cfg->method_info_offset = add_to_blob (acfg, buf, p - buf);
  	g_free (buf);
  }
  
  static guint32
  get_unwind_info_offset (MonoAotCompile *acfg, guint8 *encoded, guint32 encoded_len)
  {
  	guint32 cache_index;
  	guint32 offset;
  
  	/* Reuse the unwind module to canonize and store unwind info entries */
  	cache_index = mono_cache_unwind_info (encoded, encoded_len);
  
  	/* Use +/- 1 to distinguish 0s from missing entries */
  	offset = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->unwind_info_offsets, GUINT_TO_POINTER (cache_index + 1)));
  	if (offset)
  		return offset - 1;
  	else {
  		guint8 buf [16];
  		guint8 *p;
  
  		/* 
  		 * It would be easier to use assembler symbols, but the caller needs an
  		 * offset now.
  		 */
  		offset = acfg->unwind_info_offset;
  		g_hash_table_insert (acfg->unwind_info_offsets, GUINT_TO_POINTER (cache_index + 1), GUINT_TO_POINTER (offset + 1));
  		g_ptr_array_add (acfg->unwind_ops, GUINT_TO_POINTER (cache_index));
  
  		p = buf;
  		encode_value (encoded_len, p, &p);
  
  		acfg->unwind_info_offset += encoded_len + (p - buf);
  		return offset;
  	}
  }
  
  static void
  emit_exception_debug_info (MonoAotCompile *acfg, MonoCompile *cfg)
  {
  	MonoMethod *method;
  	int i, k, buf_size, method_index;
  	guint32 debug_info_size;
  	guint8 *code;
  	MonoMethodHeader *header;
  	guint8 *p, *buf, *debug_info;
  	MonoJitInfo *jinfo = cfg->jit_info;
  	guint32 flags;
  	gboolean use_unwind_ops = FALSE;
  	MonoSeqPointInfo *seq_points;
  
  	method = cfg->orig_method;
  	code = cfg->native_code;
  	header = cfg->header;
  
  	method_index = get_method_index (acfg, method);
  
  	if (!acfg->aot_opts.nodebug) {
  		mono_debug_serialize_debug_info (cfg, &debug_info, &debug_info_size);
  	} else {
  		debug_info = NULL;
  		debug_info_size = 0;
  	}
  
  	seq_points = cfg->seq_point_info;
  
  	buf_size = header->num_clauses * 256 + debug_info_size + 2048 + (seq_points ? (seq_points->len * 128) : 0) + cfg->gc_map_size;
  	p = buf = g_malloc (buf_size);
  
  	use_unwind_ops = cfg->unwind_ops != NULL;
  
  	flags = (jinfo->has_generic_jit_info ? 1 : 0) | (use_unwind_ops ? 2 : 0) | (header->num_clauses ? 4 : 0) | (seq_points ? 8 : 0) | (cfg->compile_llvm ? 16 : 0) | (jinfo->has_try_block_holes ? 32 : 0) | (cfg->gc_map ? 64 : 0) | (jinfo->has_arch_eh_info ? 128 : 0);
  
  	encode_value (flags, p, &p);
  
  	if (use_unwind_ops) {
  		guint32 encoded_len;
  		guint8 *encoded;
  		guint32 unwind_desc;
  
  		encoded = mono_unwind_ops_encode (cfg->unwind_ops, &encoded_len);
  
  		unwind_desc = get_unwind_info_offset (acfg, encoded, encoded_len);
  		encode_value (unwind_desc, p, &p);
  	} else {
  		encode_value (jinfo->unwind_info, p, &p);
  	}
  
  	/*Encode the number of holes before the number of clauses to make decoding easier*/
  	if (jinfo->has_try_block_holes) {
  		MonoTryBlockHoleTableJitInfo *table = mono_jit_info_get_try_block_hole_table_info (jinfo);
  		encode_value (table->num_holes, p, &p);
  	}
  
  	/* Exception table */
  	if (cfg->compile_llvm) {
  		/*
  		 * When using LLVM, we can't emit some data, like pc offsets, this reg/offset etc.,
  		 * since the information is only available to llc. Instead, we let llc save the data
  		 * into the LSDA, and read it from there at runtime.
  		 */
  		/* The assembly might be CIL stripped so emit the data ourselves */
  		if (header->num_clauses)
  			encode_value (header->num_clauses, p, &p);
  
  		for (k = 0; k < header->num_clauses; ++k) {
  			MonoExceptionClause *clause;
  
  			clause = &header->clauses [k];
  
  			encode_value (clause->flags, p, &p);
  			if (clause->data.catch_class) {
  				encode_value (1, p, &p);
  				encode_klass_ref (acfg, clause->data.catch_class, p, &p);
  			} else {
  				encode_value (0, p, &p);
  			}
  
  			/* Emit a list of nesting clauses */
  			for (i = 0; i < header->num_clauses; ++i) {
  				gint32 cindex1 = k;
  				MonoExceptionClause *clause1 = &header->clauses [cindex1];
  				gint32 cindex2 = i;
  				MonoExceptionClause *clause2 = &header->clauses [cindex2];
  
  				if (cindex1 != cindex2 && clause1->try_offset >= clause2->try_offset && clause1->handler_offset <= clause2->handler_offset)
  					encode_value (i, p, &p);
  			}
  			encode_value (-1, p, &p);
  		}
  	} else {
  		if (jinfo->num_clauses)
  			encode_value (jinfo->num_clauses, p, &p);
  
  		for (k = 0; k < jinfo->num_clauses; ++k) {
  			MonoJitExceptionInfo *ei = &jinfo->clauses [k];
  
  			encode_value (ei->flags, p, &p);
  			encode_value (ei->exvar_offset, p, &p);
  
  			if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER || ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)
  				encode_value ((gint)((guint8*)ei->data.filter - code), p, &p);
  			else {
  				if (ei->data.catch_class) {
  					guint8 *buf2, *p2;
  					int len;
  
  					buf2 = g_malloc (4096);
  					p2 = buf2;
  					encode_klass_ref (acfg, ei->data.catch_class, p2, &p2);
  					len = p2 - buf2;
  					g_assert (len < 4096);
  					encode_value (len, p, &p);
  					memcpy (p, buf2, len);
  					p += p2 - buf2;
  					g_free (buf2);
  				} else {
  					encode_value (0, p, &p);
  				}
  			}
  
  			encode_value ((gint)((guint8*)ei->try_start - code), p, &p);
  			encode_value ((gint)((guint8*)ei->try_end - code), p, &p);
  			encode_value ((gint)((guint8*)ei->handler_start - code), p, &p);
  		}
  	}
  
  	if (jinfo->has_try_block_holes) {
  		MonoTryBlockHoleTableJitInfo *table = mono_jit_info_get_try_block_hole_table_info (jinfo);
  		for (i = 0; i < table->num_holes; ++i) {
  			MonoTryBlockHoleJitInfo *hole = &table->holes [i];
  			encode_value (hole->clause, p, &p);
  			encode_value (hole->length, p, &p);
  			encode_value (hole->offset, p, &p);
  		}
  	}
  
  	if (jinfo->has_arch_eh_info) {
  		MonoArchEHJitInfo *eh_info;
  
  		eh_info = mono_jit_info_get_arch_eh_info (jinfo);
  		encode_value (eh_info->stack_size, p, &p);
  		encode_value (eh_info->epilog_size, p, &p);
  	}
  
  	if (jinfo->has_generic_jit_info) {
  		MonoGenericJitInfo *gi = mono_jit_info_get_generic_jit_info (jinfo);
  		MonoGenericSharingContext* gsctx = gi->generic_sharing_context;
  		guint8 *p1;
  		guint8 *buf2, *p2;
  		int len;
  
  		p1 = p;
  		encode_value (gi->nlocs, p, &p);
  		if (gi->nlocs) {
  			for (i = 0; i < gi->nlocs; ++i) {
  				MonoDwarfLocListEntry *entry = &gi->locations [i];
  
  				encode_value (entry->is_reg ? 1 : 0, p, &p);
  				encode_value (entry->reg, p, &p);
  				if (!entry->is_reg)
  					encode_value (entry->offset, p, &p);
  				if (i == 0)
  					g_assert (entry->from == 0);
  				else
  					encode_value (entry->from, p, &p);
  				encode_value (entry->to, p, &p);
  			}
  		} else {
  			if (!cfg->compile_llvm) {
  				encode_value (gi->has_this ? 1 : 0, p, &p);
  				encode_value (gi->this_reg, p, &p);
  				encode_value (gi->this_offset, p, &p);
  			}
  		}
  
  		/* 
  		 * Need to encode jinfo->method too, since it is not equal to 'method'
  		 * when using generic sharing.
  		 */
  		buf2 = g_malloc (4096);
  		p2 = buf2;
  		encode_method_ref (acfg, jinfo->d.method, p2, &p2);
  		len = p2 - buf2;
  		g_assert (len < 4096);
  		encode_value (len, p, &p);
  		memcpy (p, buf2, len);
  		p += p2 - buf2;
  		g_free (buf2);
  
  		if (gsctx && (gsctx->var_is_vt || gsctx->mvar_is_vt)) {
  			MonoMethodInflated *inflated;
  			MonoGenericContext *context;
  			MonoGenericInst *inst;
  
  			g_assert (jinfo->d.method->is_inflated);
  			inflated = (MonoMethodInflated*)jinfo->d.method;
  			context = &inflated->context;
  
  			encode_value (1, p, &p);
  			if (context->class_inst) {
  				inst = context->class_inst;
  
  				encode_value (inst->type_argc, p, &p);
  				for (i = 0; i < inst->type_argc; ++i)
  					encode_value (gsctx->var_is_vt [i], p, &p);
  			} else {
  				encode_value (0, p, &p);
  			}
  			if (context->method_inst) {
  				inst = context->method_inst;
  
  				encode_value (inst->type_argc, p, &p);
  				for (i = 0; i < inst->type_argc; ++i)
  					encode_value (gsctx->mvar_is_vt [i], p, &p);
  			} else {
  				encode_value (0, p, &p);
  			}
  		} else {
  			encode_value (0, p, &p);
  		}
  	}
  
  	if (seq_points) {
  		int il_offset, native_offset, last_il_offset, last_native_offset, j;
  
  		encode_value (seq_points->len, p, &p);
  		last_il_offset = last_native_offset = 0;
  		for (i = 0; i < seq_points->len; ++i) {
  			SeqPoint *sp = &seq_points->seq_points [i];
  			il_offset = sp->il_offset;
  			native_offset = sp->native_offset;
  			encode_value (il_offset - last_il_offset, p, &p);
  			encode_value (native_offset - last_native_offset, p, &p);
  			last_il_offset = il_offset;
  			last_native_offset = native_offset;
  
  			encode_value (sp->flags, p, &p);
  			encode_value (sp->next_len, p, &p);
  			for (j = 0; j < sp->next_len; ++j)
  				encode_value (sp->next [j], p, &p);
  		}
  	}
  		
  	g_assert (debug_info_size < buf_size);
  
  	encode_value (debug_info_size, p, &p);
  	if (debug_info_size) {
  		memcpy (p, debug_info, debug_info_size);
  		p += debug_info_size;
  		g_free (debug_info);
  	}
  
  	/* GC Map */
  	if (cfg->gc_map) {
  		encode_value (cfg->gc_map_size, p, &p);
  		/* The GC map requires 4 bytes of alignment */
  		while ((gsize)p % 4)
  			p ++;
  		memcpy (p, cfg->gc_map, cfg->gc_map_size);
  		p += cfg->gc_map_size;
  	}
  
  	acfg->stats.ex_info_size += p - buf;
  
  	g_assert (p - buf < buf_size);
  
  	/* Emit info */
  	/* The GC Map requires 4 byte alignment */
  	cfg->ex_info_offset = add_to_blob_aligned (acfg, buf, p - buf, cfg->gc_map ? 4 : 1);
  	g_free (buf);
  }
  
  static guint32
  emit_klass_info (MonoAotCompile *acfg, guint32 token)
  {
  	MonoError error;
  	MonoClass *klass = mono_class_get_checked (acfg->image, token, &error);
  	guint8 *p, *buf;
  	int i, buf_size, res;
  	gboolean no_special_static, cant_encode;
  	gpointer iter = NULL;
  
  	if (!klass) {
  		mono_error_cleanup (&error);
  
  		buf_size = 16;
  
  		p = buf = g_malloc (buf_size);
  
  		/* Mark as unusable */
  		encode_value (-1, p, &p);
  
  		res = add_to_blob (acfg, buf, p - buf);
  		g_free (buf);
  
  		return res;
  	}
  		
  	buf_size = 10240 + (klass->vtable_size * 16);
  	p = buf = g_malloc (buf_size);
  
  	g_assert (klass);
  
  	mono_class_init (klass);
  
  	mono_class_get_nested_types (klass, &iter);
  	g_assert (klass->nested_classes_inited);
  
  	mono_class_setup_vtable (klass);
  
  	/* 
  	 * Emit all the information which is required for creating vtables so
  	 * the runtime does not need to create the MonoMethod structures which
  	 * take up a lot of space.
  	 */
  
  	no_special_static = !mono_class_has_special_static_fields (klass);
  
  	/* Check whenever we have enough info to encode the vtable */
  	cant_encode = FALSE;
  	for (i = 0; i < klass->vtable_size; ++i) {
  		MonoMethod *cm = klass->vtable [i];
  
  		if (cm && mono_method_signature (cm)->is_inflated && !g_hash_table_lookup (acfg->token_info_hash, cm))
  			cant_encode = TRUE;
  	}
  
  	mono_class_has_finalizer (klass);
  
  	if (klass->generic_container || cant_encode) {
  		encode_value (-1, p, &p);
  	} else {
  		encode_value (klass->vtable_size, p, &p);
  		encode_value ((klass->generic_container ? (1 << 8) : 0) | (no_special_static << 7) | (klass->has_static_refs << 6) | (klass->has_references << 5) | ((klass->blittable << 4) | ((klass->ext && klass->ext->nested_classes) ? 1 : 0) << 3) | (klass->has_cctor << 2) | (klass->has_finalize << 1) | klass->ghcimpl, p, &p);
  		if (klass->has_cctor)
  			encode_method_ref (acfg, mono_class_get_cctor (klass), p, &p);
  		if (klass->has_finalize)
  			encode_method_ref (acfg, mono_class_get_finalizer (klass), p, &p);
   
  		encode_value (klass->instance_size, p, &p);
  		encode_value (mono_class_data_size (klass), p, &p);
  		encode_value (klass->packing_size, p, &p);
  		encode_value (klass->min_align, p, &p);
  
  		for (i = 0; i < klass->vtable_size; ++i) {
  			MonoMethod *cm = klass->vtable [i];
  
  			if (cm)
  				encode_method_ref (acfg, cm, p, &p);
  			else
  				encode_value (0, p, &p);
  		}
  	}
  
  	acfg->stats.class_info_size += p - buf;
  
  	g_assert (p - buf < buf_size);
  	res = add_to_blob (acfg, buf, p - buf);
  	g_free (buf);
  
  	return res;
  }
  
  static char*
  get_plt_entry_debug_sym (MonoAotCompile *acfg, MonoJumpInfo *ji, GHashTable *cache)
  {
  	char *debug_sym = NULL;
  	char *s;
  
  	switch (ji->type) {
  	case MONO_PATCH_INFO_METHOD:
  		debug_sym = get_debug_sym (ji->data.method, "plt_", cache);
  		break;
  	case MONO_PATCH_INFO_INTERNAL_METHOD:
  		debug_sym = g_strdup_printf ("plt__jit_icall_%s", ji->data.name);
  		break;
  	case MONO_PATCH_INFO_CLASS_INIT:
  		s = mono_type_get_name (&ji->data.klass->byval_arg);
  		debug_sym = g_strdup_printf ("plt__class_init_%s", s);
  		g_free (s);
  		break;
  	case MONO_PATCH_INFO_RGCTX_FETCH:
  		debug_sym = g_strdup_printf ("plt__rgctx_fetch_%d", acfg->label_generator ++);
  		break;
  	case MONO_PATCH_INFO_ICALL_ADDR: {
  		char *s = get_debug_sym (ji->data.method, "", cache);
  		
  		debug_sym = g_strdup_printf ("plt__icall_native_%s", s);
  		g_free (s);
  		break;
  	}
  	case MONO_PATCH_INFO_JIT_ICALL_ADDR:
  		debug_sym = g_strdup_printf ("plt__jit_icall_native_%s", ji->data.name);
  		break;
  	case MONO_PATCH_INFO_GENERIC_CLASS_INIT:
  		debug_sym = g_strdup_printf ("plt__generic_class_init");
  		break;
  	default:
  		break;
  	}
  
  	return sanitize_symbol (acfg, debug_sym);
  }
  
  /*
   * Calls made from AOTed code are routed through a table of jumps similar to the
   * ELF PLT (Program Linkage Table). Initially the PLT entries jump to code which transfers
   * control to the AOT runtime through a trampoline.
   */
  static void
  emit_plt (MonoAotCompile *acfg)
  {
  	char symbol [128];
  	int i;
  
  	emit_line (acfg);
  	sprintf (symbol, "plt");
  
  	emit_section_change (acfg, ".text", 0);
  	emit_alignment (acfg, NACL_SIZE(16, kNaClAlignment));
  	emit_label (acfg, symbol);
  	emit_label (acfg, acfg->plt_symbol);
  
  	for (i = 0; i < acfg->plt_offset; ++i) {
  		char *debug_sym = NULL;
  		MonoPltEntry *plt_entry = NULL;
  		MonoJumpInfo *ji;
  
  		if (i == 0)
  			/* 
  			 * The first plt entry is unused.
  			 */
  			continue;
  
  		plt_entry = g_hash_table_lookup (acfg->plt_offset_to_entry, GUINT_TO_POINTER (i));
  		ji = plt_entry->ji;
  
  		debug_sym = plt_entry->debug_sym;
  
  		if (acfg->thumb_mixed && !plt_entry->jit_used)
  			/* Emit only a thumb version */
  			continue;
  
  		/* Skip plt entries not actually called */
  		if (!plt_entry->jit_used && !plt_entry->llvm_used)
  			continue;
  
  		if (acfg->llvm && !acfg->thumb_mixed)
  			emit_label (acfg, plt_entry->llvm_symbol);
  
  		if (debug_sym) {
  			if (acfg->need_no_dead_strip) {
  				emit_unset_mode (acfg);
  				fprintf (acfg->fp, "	.no_dead_strip %s\n", debug_sym);
  			}
  			emit_local_symbol (acfg, debug_sym, NULL, TRUE);
  			emit_label (acfg, debug_sym);
  		}
  
  		emit_label (acfg, plt_entry->symbol);
  
  		arch_emit_plt_entry (acfg, i);
  
  		if (debug_sym)
  			emit_symbol_size (acfg, debug_sym, ".");
  	}
  
  	if (acfg->thumb_mixed) {
  		/* Make sure the ARM symbols don't alias the thumb ones */
  		emit_zero_bytes (acfg, 16);
  
  		/* 
  		 * Emit a separate set of PLT entries using thumb2 which is called by LLVM generated
  		 * code.
  		 */
  		for (i = 0; i < acfg->plt_offset; ++i) {
  			char *debug_sym = NULL;
  			MonoPltEntry *plt_entry = NULL;
  			MonoJumpInfo *ji;
  
  			if (i == 0)
  				continue;
  
  			plt_entry = g_hash_table_lookup (acfg->plt_offset_to_entry, GUINT_TO_POINTER (i));
  			ji = plt_entry->ji;
  
  			/* Skip plt entries not actually called by LLVM code */
  			if (!plt_entry->llvm_used)
  				continue;
  
  			if (acfg->aot_opts.write_symbols) {
  				if (plt_entry->debug_sym)
  					debug_sym = g_strdup_printf ("%s_thumb", plt_entry->debug_sym);
  			}
  
  			if (debug_sym) {
  #if defined(TARGET_MACH)
  				fprintf (acfg->fp, "	.thumb_func %s\n", debug_sym);
  				fprintf (acfg->fp, "	.no_dead_strip %s\n", debug_sym);
  #endif
  				emit_local_symbol (acfg, debug_sym, NULL, TRUE);
  				emit_label (acfg, debug_sym);
  			}
  			fprintf (acfg->fp, "\n.thumb_func\n");
  
  			emit_label (acfg, plt_entry->llvm_symbol);
  
  			arch_emit_llvm_plt_entry (acfg, i);
  
  			if (debug_sym) {
  				emit_symbol_size (acfg, debug_sym, ".");
  				g_free (debug_sym);
  			}
  		}
  	}
  
  	emit_symbol_size (acfg, acfg->plt_symbol, ".");
  
  	sprintf (symbol, "plt_end");
  	emit_label (acfg, symbol);
  }
  
  /*
   * emit_trampoline_full:
   *
   *   If EMIT_TINFO is TRUE, emit additional information which can be used to create a MonoJitInfo for this trampoline by
   * create_jit_info_for_trampoline ().
   */
  static G_GNUC_UNUSED void
  emit_trampoline_full (MonoAotCompile *acfg, int got_offset, MonoTrampInfo *info, gboolean emit_tinfo)
  {
  	char start_symbol [256];
  	char end_symbol [256];
  	char symbol [256];
  	guint32 buf_size, info_offset;
  	MonoJumpInfo *patch_info;
  	guint8 *buf, *p;
  	GPtrArray *patches;
  	char *name;
  	guint8 *code;
  	guint32 code_size;
  	MonoJumpInfo *ji;
  	GSList *unwind_ops;
  
  	g_assert (info);
  
  	name = info->name;
  	code = info->code;
  	code_size = info->code_size;
  	ji = info->ji;
  	unwind_ops = info->unwind_ops;
  
  #ifdef __native_client_codegen__
  	mono_nacl_fix_patches (code, ji);
  #endif
  
  	/* Emit code */
  
  	sprintf (start_symbol, "%s%s", acfg->user_symbol_prefix, name);
  
  	emit_section_change (acfg, ".text", 0);
  	emit_global (acfg, start_symbol, TRUE);
  	emit_alignment (acfg, AOT_FUNC_ALIGNMENT);
  	emit_label (acfg, start_symbol);
  
  	sprintf (symbol, "%snamed_%s", acfg->temp_prefix, name);
  	emit_label (acfg, symbol);
  
  	/* 
  	 * The code should access everything through the GOT, so we pass
  	 * TRUE here.
  	 */
  	emit_and_reloc_code (acfg, NULL, code, code_size, ji, TRUE, NULL);
  
  	emit_symbol_size (acfg, start_symbol, ".");
  
  	if (emit_tinfo) {
  		sprintf (end_symbol, "%snamede_%s", acfg->temp_prefix, name);
  		emit_label (acfg, end_symbol);
  	}
  
  	/* Emit info */
  
  	/* Sort relocations */
  	patches = g_ptr_array_new ();
  	for (patch_info = ji; patch_info; patch_info = patch_info->next)
  		if (patch_info->type != MONO_PATCH_INFO_NONE)
  			g_ptr_array_add (patches, patch_info);
  	g_ptr_array_sort (patches, compare_patches);
  
  	buf_size = patches->len * 128 + 128;
  	buf = g_malloc (buf_size);
  	p = buf;
  
  	encode_patch_list (acfg, patches, patches->len, got_offset, p, &p);
  	g_assert (p - buf < buf_size);
  
  	sprintf (symbol, "%s%s_p", acfg->user_symbol_prefix, name);
  
  	info_offset = add_to_blob (acfg, buf, p - buf);
  
  	emit_section_change (acfg, RODATA_SECT, 0);
  	emit_global (acfg, symbol, FALSE);
  	emit_label (acfg, symbol);
  
  	emit_int32 (acfg, info_offset);
  
  	if (emit_tinfo) {
  		guint8 *encoded;
  		guint32 encoded_len;
  		guint32 uw_offset;
  
  		/*
  		 * Emit additional information which can be used to reconstruct a partial MonoTrampInfo.
  		 */
  		encoded = mono_unwind_ops_encode (info->unwind_ops, &encoded_len);
  		uw_offset = get_unwind_info_offset (acfg, encoded, encoded_len);
  		g_free (encoded);
  
  		emit_symbol_diff (acfg, end_symbol, start_symbol, 0);
  		emit_int32 (acfg, uw_offset);
  	}
  
  	/* Emit debug info */
  	if (unwind_ops) {
  		char symbol2 [256];
  
  		sprintf (symbol, "%s", name);
  		sprintf (symbol2, "%snamed_%s", acfg->temp_prefix, name);
  
  		if (acfg->dwarf)
  			mono_dwarf_writer_emit_trampoline (acfg->dwarf, symbol, symbol2, NULL, NULL, code_size, unwind_ops);
  	}
  }
  
  static G_GNUC_UNUSED void
  emit_trampoline (MonoAotCompile *acfg, int got_offset, MonoTrampInfo *info)
  {
  	emit_trampoline_full (acfg, got_offset, info, FALSE);
  }
  
  static void
  emit_trampolines (MonoAotCompile *acfg)
  {
  	char symbol [256];
  	char end_symbol [256];
  	int i, tramp_got_offset;
  	MonoAotTrampoline ntype;
  #ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
  	int tramp_type;
  #endif
  
  	if (!acfg->aot_opts.full_aot)
  		return;
  	
  	g_assert (acfg->image->assembly);
  
  	/* Currently, we emit most trampolines into the mscorlib AOT image. */
  	if (strcmp (acfg->image->assembly->aname.name, "mscorlib") == 0) {
  #ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
  		MonoTrampInfo *info;
  
  		/*
  		 * Emit the generic trampolines.
  		 *
  		 * We could save some code by treating the generic trampolines as a wrapper
  		 * method, but that approach has its own complexities, so we choose the simpler
  		 * method.
  		 */
  		for (tramp_type = 0; tramp_type < MONO_TRAMPOLINE_NUM; ++tramp_type) {
  			/* we overload the boolean here to indicate the slightly different trampoline needed, see mono_arch_create_generic_trampoline() */
  #ifdef DISABLE_REMOTING
  			if (tramp_type == MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING)
  				continue;
  #endif
  #ifndef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
  			if (tramp_type == MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD)
  				continue;
  #endif
  			mono_arch_create_generic_trampoline (tramp_type, &info, acfg->aot_opts.use_trampolines_page? 2: TRUE);
  			emit_trampoline (acfg, acfg->got_offset, info);
  		}
  
  		mono_arch_get_nullified_class_init_trampoline (&info);
  		emit_trampoline (acfg, acfg->got_offset, info);
  #if defined(MONO_ARCH_MONITOR_OBJECT_REG)
  		mono_arch_create_monitor_enter_trampoline (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  		mono_arch_create_monitor_exit_trampoline (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  #endif
  
  		mono_arch_create_generic_class_init_trampoline (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  
  		/* Emit the exception related code pieces */
  		mono_arch_get_restore_context (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  		mono_arch_get_call_filter (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  		mono_arch_get_throw_exception (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  		mono_arch_get_rethrow_exception (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  		mono_arch_get_throw_corlib_exception (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  
  #ifdef MONO_ARCH_GSHAREDVT_SUPPORTED
  		mono_arch_get_gsharedvt_trampoline (&info, TRUE);
  		if (info) {
  			emit_trampoline_full (acfg, acfg->got_offset, info, TRUE);
  
  			/* Create a separate out trampoline for more information in stack traces */
  			info->name = g_strdup ("gsharedvt_out_trampoline");
  			emit_trampoline_full (acfg, acfg->got_offset, info, TRUE);
  		}
  #endif
  
  #if defined(MONO_ARCH_HAVE_GET_TRAMPOLINES)
  		{
  			GSList *l = mono_arch_get_trampolines (TRUE);
  
  			while (l) {
  				MonoTrampInfo *info = l->data;
  
  				emit_trampoline (acfg, acfg->got_offset, info);
  				l = l->next;
  			}
  		}
  #endif
  
  		for (i = 0; i < acfg->aot_opts.nrgctx_fetch_trampolines; ++i) {
  			int offset;
  
  			offset = MONO_RGCTX_SLOT_MAKE_RGCTX (i);
  			mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, TRUE);
  			emit_trampoline (acfg, acfg->got_offset, info);
  
  			offset = MONO_RGCTX_SLOT_MAKE_MRGCTX (i);
  			mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, TRUE);
  			emit_trampoline (acfg, acfg->got_offset, info);
  		}
  
  #ifdef MONO_ARCH_HAVE_GENERAL_RGCTX_LAZY_FETCH_TRAMPOLINE
  		mono_arch_create_general_rgctx_lazy_fetch_trampoline (&info, TRUE);
  		emit_trampoline (acfg, acfg->got_offset, info);
  #endif
  
  		{
  			GSList *l;
  
  			/* delegate_invoke_impl trampolines */
  			l = mono_arch_get_delegate_invoke_impls ();
  			while (l) {
  				MonoTrampInfo *info = l->data;
  
  				emit_trampoline (acfg, acfg->got_offset, info);
  				l = l->next;
  			}
  		}
  
  #endif /* #ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES */
  
  		/* Emit trampolines which are numerous */
  
  		/*
  		 * These include the following:
  		 * - specific trampolines
  		 * - static rgctx invoke trampolines
  		 * - imt thunks
  		 * These trampolines have the same code, they are parameterized by GOT 
  		 * slots. 
  		 * They are defined in this file, in the arch_... routines instead of
  		 * in tramp-<ARCH>.c, since it is easier to do it this way.
  		 */
  
  		/*
  		 * When running in aot-only mode, we can't create specific trampolines at 
  		 * runtime, so we create a few, and save them in the AOT file. 
  		 * Normal trampolines embed their argument as a literal inside the 
  		 * trampoline code, we can't do that here, so instead we embed an offset
  		 * which needs to be added to the trampoline address to get the address of
  		 * the GOT slot which contains the argument value.
  		 * The generated trampolines jump to the generic trampolines using another
  		 * GOT slot, which will be setup by the AOT loader to point to the 
  		 * generic trampoline code of the given type.
  		 */
  
  		/*
  		 * FIXME: Maybe we should use more specific trampolines (i.e. one class init for
  		 * each class).
  		 */
  
  		emit_section_change (acfg, ".text", 0);
  
  		tramp_got_offset = acfg->got_offset;
  
  		for (ntype = 0; ntype < MONO_AOT_TRAMP_NUM; ++ntype) {
  			switch (ntype) {
  			case MONO_AOT_TRAMP_SPECIFIC:
  				sprintf (symbol, "specific_trampolines");
  				break;
  			case MONO_AOT_TRAMP_STATIC_RGCTX:
  				sprintf (symbol, "static_rgctx_trampolines");
  				break;
  			case MONO_AOT_TRAMP_IMT_THUNK:
  				sprintf (symbol, "imt_thunks");
  				break;
  			case MONO_AOT_TRAMP_GSHAREDVT_ARG:
  				sprintf (symbol, "gsharedvt_arg_trampolines");
  				break;
  			default:
  				g_assert_not_reached ();
  			}
  
  			sprintf (end_symbol, "%s_e", symbol);
  
  			if (acfg->aot_opts.write_symbols)
  				emit_local_symbol (acfg, symbol, end_symbol, TRUE);
  
  			emit_alignment (acfg, AOT_FUNC_ALIGNMENT);
  			emit_label (acfg, symbol);
  
  			acfg->trampoline_got_offset_base [ntype] = tramp_got_offset;
  
  			for (i = 0; i < acfg->num_trampolines [ntype]; ++i) {
  				int tramp_size = 0;
  
  				switch (ntype) {
  				case MONO_AOT_TRAMP_SPECIFIC:
  					arch_emit_specific_trampoline (acfg, tramp_got_offset, &tramp_size);
  					tramp_got_offset += 2;
  				break;
  				case MONO_AOT_TRAMP_STATIC_RGCTX:
  					arch_emit_static_rgctx_trampoline (acfg, tramp_got_offset, &tramp_size);				
  					tramp_got_offset += 2;
  					break;
  				case MONO_AOT_TRAMP_IMT_THUNK:
  					arch_emit_imt_thunk (acfg, tramp_got_offset, &tramp_size);
  					tramp_got_offset += 1;
  					break;
  				case MONO_AOT_TRAMP_GSHAREDVT_ARG:
  					arch_emit_gsharedvt_arg_trampoline (acfg, tramp_got_offset, &tramp_size);				
  					tramp_got_offset += 2;
  					break;
  				default:
  					g_assert_not_reached ();
  				}
  #ifdef __native_client_codegen__
  				/* align to avoid 32-byte boundary crossings */
  				emit_alignment (acfg, AOT_FUNC_ALIGNMENT);
  #endif
  
  				if (!acfg->trampoline_size [ntype]) {
  					g_assert (tramp_size);
  					acfg->trampoline_size [ntype] = tramp_size;
  				}
  			}
  
  			emit_label (acfg, end_symbol);
  			emit_int32 (acfg, 0);
  		}
  
  		arch_emit_specific_trampoline_pages (acfg);
  
  		/* Reserve some entries at the end of the GOT for our use */
  		acfg->num_trampoline_got_entries = tramp_got_offset - acfg->got_offset;
  	}
  
  	acfg->got_offset += acfg->num_trampoline_got_entries;
  }
  
  static gboolean
  str_begins_with (const char *str1, const char *str2)
  {
  	int len = strlen (str2);
  	return strncmp (str1, str2, len) == 0;
  }
  
  void*
  mono_aot_readonly_field_override (MonoClassField *field)
  {
  	ReadOnlyValue *rdv;
  	for (rdv = readonly_values; rdv; rdv = rdv->next) {
  		char *p = rdv->name;
  		int len;
  		len = strlen (field->parent->name_space);
  		if (strncmp (p, field->parent->name_space, len))
  			continue;
  		p += len;
  		if (*p++ != '.')
  			continue;
  		len = strlen (field->parent->name);
  		if (strncmp (p, field->parent->name, len))
  			continue;
  		p += len;
  		if (*p++ != '.')
  			continue;
  		if (strcmp (p, field->name))
  			continue;
  		switch (rdv->type) {
  		case MONO_TYPE_I1:
  			return &rdv->value.i1;
  		case MONO_TYPE_I2:
  			return &rdv->value.i2;
  		case MONO_TYPE_I4:
  			return &rdv->value.i4;
  		default:
  			break;
  		}
  	}
  	return NULL;
  }
  
  static void
  add_readonly_value (MonoAotOptions *opts, const char *val)
  {
  	ReadOnlyValue *rdv;
  	const char *fval;
  	const char *tval;
  	/* the format of val is:
  	 * namespace.typename.fieldname=type/value
  	 * type can be i1 for uint8/int8/boolean, i2 for uint16/int16/char, i4 for uint32/int32
  	 */
  	fval = strrchr (val, '/');
  	if (!fval) {
  		fprintf (stderr, "AOT : invalid format for readonly field '%s', missing /.\n", val);
  		exit (1);
  	}
  	tval = strrchr (val, '=');
  	if (!tval) {
  		fprintf (stderr, "AOT : invalid format for readonly field '%s', missing =.\n", val);
  		exit (1);
  	}
  	rdv = g_new0 (ReadOnlyValue, 1);
  	rdv->name = g_malloc0 (tval - val + 1);
  	memcpy (rdv->name, val, tval - val);
  	tval++;
  	fval++;
  	if (strncmp (tval, "i1", 2) == 0) {
  		rdv->value.i1 = atoi (fval);
  		rdv->type = MONO_TYPE_I1;
  	} else if (strncmp (tval, "i2", 2) == 0) {
  		rdv->value.i2 = atoi (fval);
  		rdv->type = MONO_TYPE_I2;
  	} else if (strncmp (tval, "i4", 2) == 0) {
  		rdv->value.i4 = atoi (fval);
  		rdv->type = MONO_TYPE_I4;
  	} else {
  		fprintf (stderr, "AOT : unsupported type for readonly field '%s'.\n", tval);
  		exit (1);
  	}
  	rdv->next = readonly_values;
  	readonly_values = rdv;
  }
  
  static void
  mono_aot_parse_options (const char *aot_options, MonoAotOptions *opts)
  {
  	gchar **args, **ptr;
  
  	args = g_strsplit (aot_options ? aot_options : "", ",", -1);
  	for (ptr = args; ptr && *ptr; ptr ++) {
  		const char *arg = *ptr;
  
  		if (str_begins_with (arg, "outfile=")) {
  			opts->outfile = g_strdup (arg + strlen ("outfile="));
  		} else if (str_begins_with (arg, "save-temps")) {
  			opts->save_temps = TRUE;
  		} else if (str_begins_with (arg, "keep-temps")) {
  			opts->save_temps = TRUE;
  		} else if (str_begins_with (arg, "write-symbols")) {
  			opts->write_symbols = TRUE;
  		} else if (str_begins_with (arg, "no-write-symbols")) {
  			opts->write_symbols = FALSE;
  		} else if (str_begins_with (arg, "metadata-only")) {
  			opts->metadata_only = TRUE;
  		} else if (str_begins_with (arg, "bind-to-runtime-version")) {
  			opts->bind_to_runtime_version = TRUE;
  		} else if (str_begins_with (arg, "full")) {
  			opts->full_aot = TRUE;
  		} else if (str_begins_with (arg, "threads=")) {
  			opts->nthreads = atoi (arg + strlen ("threads="));
  		} else if (str_begins_with (arg, "static")) {
  			opts->static_link = TRUE;
  			opts->no_dlsym = TRUE;
  		} else if (str_begins_with (arg, "asmonly")) {
  			opts->asm_only = TRUE;
  		} else if (str_begins_with (arg, "asmwriter")) {
  			opts->asm_writer = TRUE;
  		} else if (str_begins_with (arg, "nodebug")) {
  			opts->nodebug = TRUE;
  		} else if (str_begins_with (arg, "dwarfdebug")) {
  			opts->dwarf_debug = TRUE;
  		} else if (str_begins_with (arg, "nopagetrampolines")) {
  			opts->use_trampolines_page = FALSE;
  		} else if (str_begins_with (arg, "ntrampolines=")) {
  			opts->ntrampolines = atoi (arg + strlen ("ntrampolines="));
  		} else if (str_begins_with (arg, "nrgctx-trampolines=")) {
  			opts->nrgctx_trampolines = atoi (arg + strlen ("nrgctx-trampolines="));
  		} else if (str_begins_with (arg, "nimt-trampolines=")) {
  			opts->nimt_trampolines = atoi (arg + strlen ("nimt-trampolines="));
  		} else if (str_begins_with (arg, "ngsharedvt-trampolines=")) {
  			opts->ngsharedvt_arg_trampolines = atoi (arg + strlen ("ngsharedvt-trampolines="));
  		} else if (str_begins_with (arg, "autoreg")) {
  			opts->autoreg = TRUE;
  		} else if (str_begins_with (arg, "tool-prefix=")) {
  			opts->tool_prefix = g_strdup (arg + strlen ("tool-prefix="));
  		} else if (str_begins_with (arg, "soft-debug")) {
  			opts->soft_debug = TRUE;
  		} else if (str_begins_with (arg, "direct-pinvoke")) {
  			opts->direct_pinvoke = TRUE;
  		} else if (str_begins_with (arg, "direct-icalls")) {
  			opts->direct_icalls = TRUE;
  #if defined(TARGET_ARM) || defined(TARGET_ARM64)
  		} else if (str_begins_with (arg, "iphone-abi")) {
  			// older full-aot users did depend on this.
  #endif
  		} else if (str_begins_with (arg, "no-direct-calls")) {
  			opts->no_direct_calls = TRUE;
  		} else if (str_begins_with (arg, "print-skipped")) {
  			opts->print_skipped_methods = TRUE;
  		} else if (str_begins_with (arg, "stats")) {
  			opts->stats = TRUE;
  		} else if (str_begins_with (arg, "no-instances")) {
  			opts->no_instances = TRUE;
  		} else if (str_begins_with (arg, "log-generics")) {
  			opts->log_generics = TRUE;
  		} else if (str_begins_with (arg, "log-instances=")) {
  			opts->log_instances = TRUE;
  			opts->instances_logfile_path = g_strdup (arg + strlen ("log-instances="));
  		} else if (str_begins_with (arg, "log-instances")) {
  			opts->log_instances = TRUE;
  		} else if (str_begins_with (arg, "internal-logfile=")) {
  			opts->logfile = g_strdup (arg + strlen ("internal-logfile="));
  		} else if (str_begins_with (arg, "mtriple=")) {
  			opts->mtriple = g_strdup (arg + strlen ("mtriple="));
  		} else if (str_begins_with (arg, "llvm-path=")) {
  			opts->llvm_path = g_strdup (arg + strlen ("llvm-path="));
  		} else if (!strcmp (arg, "llvm")) {
  			opts->llvm = TRUE;
  		} else if (str_begins_with (arg, "readonly-value=")) {
  			add_readonly_value (opts, arg + strlen ("readonly-value="));
  		} else if (str_begins_with (arg, "info")) {
  			printf ("AOT target setup: %s.\n", AOT_TARGET_STR);
  			exit (0);
  		} else if (str_begins_with (arg, "gc-maps")) {
  			mini_gc_enable_gc_maps_for_aot ();
  		} else if (str_begins_with (arg, "help") || str_begins_with (arg, "?")) {
  			printf ("Supported options for --aot:\n");
  			printf ("    outfile=\n");
  			printf ("    save-temps\n");
  			printf ("    keep-temps\n");
  			printf ("    write-symbols\n");
  			printf ("    metadata-only\n");
  			printf ("    bind-to-runtime-version\n");
  			printf ("    full\n");
  			printf ("    threads=\n");
  			printf ("    static\n");
  			printf ("    asmonly\n");
  			printf ("    asmwriter\n");
  			printf ("    nodebug\n");
  			printf ("    dwarfdebug\n");
  			printf ("    ntrampolines=\n");
  			printf ("    nrgctx-trampolines=\n");
  			printf ("    nimt-trampolines=\n");
  			printf ("    ngsharedvt-trampolines=\n");
  			printf ("    autoreg\n");
  			printf ("    tool-prefix=\n");
  			printf ("    readonly-value=\n");
  			printf ("    soft-debug\n");
  			printf ("    gc-maps\n");
  			printf ("    print-skipped\n");
  			printf ("    no-instances\n");
  			printf ("    stats\n");
  			printf ("    info\n");
  			printf ("    help/?\n");
  			exit (0);
  		} else {
  			fprintf (stderr, "AOT : Unknown argument '%s'.\n", arg);
  			exit (1);
  		}
  	}
  
  	if (opts->use_trampolines_page) {
  		opts->ntrampolines = 0;
  		opts->nrgctx_trampolines = 0;
  		opts->nimt_trampolines = 0;
  		opts->ngsharedvt_arg_trampolines = 0;
  	}
  	g_strfreev (args);
  }
  
  static void
  add_token_info_hash (gpointer key, gpointer value, gpointer user_data)
  {
  	MonoMethod *method = (MonoMethod*)key;
  	MonoJumpInfoToken *ji = (MonoJumpInfoToken*)value;
  	MonoAotCompile *acfg = user_data;
  	MonoJumpInfoToken *new_ji;
  
  	new_ji = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoJumpInfoToken));
  	new_ji->image = ji->image;
  	new_ji->token = ji->token;
  	g_hash_table_insert (acfg->token_info_hash, method, new_ji);
  }
  
  static gboolean
  can_encode_class (MonoAotCompile *acfg, MonoClass *klass)
  {
  	if (klass->type_token)
  		return TRUE;
  	if ((klass->byval_arg.type == MONO_TYPE_VAR) || (klass->byval_arg.type == MONO_TYPE_MVAR) || (klass->byval_arg.type == MONO_TYPE_PTR))
  		return TRUE;
  	if (klass->rank)
  		return can_encode_class (acfg, klass->element_class);
  	return FALSE;
  }
  
  static gboolean
  can_encode_method (MonoAotCompile *acfg, MonoMethod *method)
  {
  		if (method->wrapper_type) {
  			switch (method->wrapper_type) {
  			case MONO_WRAPPER_NONE:
  			case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK:
  			case MONO_WRAPPER_XDOMAIN_INVOKE:
  			case MONO_WRAPPER_STFLD:
  			case MONO_WRAPPER_LDFLD:
  			case MONO_WRAPPER_LDFLDA:
  			case MONO_WRAPPER_LDFLD_REMOTE:
  			case MONO_WRAPPER_STFLD_REMOTE:
  			case MONO_WRAPPER_STELEMREF:
  			case MONO_WRAPPER_ISINST:
  			case MONO_WRAPPER_PROXY_ISINST:
  			case MONO_WRAPPER_ALLOC:
  			case MONO_WRAPPER_REMOTING_INVOKE:
  			case MONO_WRAPPER_UNKNOWN:
  			case MONO_WRAPPER_WRITE_BARRIER:
  			case MONO_WRAPPER_DELEGATE_INVOKE:
  			case MONO_WRAPPER_DELEGATE_BEGIN_INVOKE:
  			case MONO_WRAPPER_DELEGATE_END_INVOKE:
  			case MONO_WRAPPER_SYNCHRONIZED:
  				break;
  			case MONO_WRAPPER_MANAGED_TO_MANAGED:
  			case MONO_WRAPPER_CASTCLASS: {
  				WrapperInfo *info = mono_marshal_get_wrapper_info (method);
  
  				if (info)
  					return TRUE;
  				else
  					return FALSE;
  				break;
  			}
  			default:
  				//printf ("Skip (wrapper call): %d -> %s\n", patch_info->type, mono_method_full_name (patch_info->data.method, TRUE));
  				return FALSE;
  			}
  		} else {
  			if (!method->token) {
  				/* The method is part of a constructed type like Int[,].Set (). */
  				if (!g_hash_table_lookup (acfg->token_info_hash, method)) {
  					if (method->klass->rank)
  						return TRUE;
  					return FALSE;
  				}
  			}
  		}
  		return TRUE;
  }
  
  static gboolean
  can_encode_patch (MonoAotCompile *acfg, MonoJumpInfo *patch_info)
  {
  	switch (patch_info->type) {
  	case MONO_PATCH_INFO_METHOD:
  	case MONO_PATCH_INFO_METHODCONST:
  	case MONO_PATCH_INFO_METHOD_CODE_SLOT: {
  		MonoMethod *method = patch_info->data.method;
  
  		return can_encode_method (acfg, method);
  	}
  	case MONO_PATCH_INFO_VTABLE:
  	case MONO_PATCH_INFO_CLASS_INIT:
  	case MONO_PATCH_INFO_CLASS:
  	case MONO_PATCH_INFO_IID:
  	case MONO_PATCH_INFO_ADJUSTED_IID:
  		if (!can_encode_class (acfg, patch_info->data.klass)) {
  			//printf ("Skip: %s\n", mono_type_full_name (&patch_info->data.klass->byval_arg));
  			return FALSE;
  		}
  		break;
  	case MONO_PATCH_INFO_DELEGATE_TRAMPOLINE: {
  		if (!can_encode_class (acfg, patch_info->data.del_tramp->klass)) {
  			//printf ("Skip: %s\n", mono_type_full_name (&patch_info->data.klass->byval_arg));
  			return FALSE;
  		}
  		break;
  	}
  	case MONO_PATCH_INFO_RGCTX_FETCH: {
  		MonoJumpInfoRgctxEntry *entry = patch_info->data.rgctx_entry;
  
  		if (!can_encode_method (acfg, entry->method))
  			return FALSE;
  		if (!can_encode_patch (acfg, entry->data))
  			return FALSE;
  		break;
  	}
  	default:
  		break;
  	}
  
  	return TRUE;
  }
  
  /*
   * compile_method:
   *
   *   AOT compile a given method.
   * This function might be called by multiple threads, so it must be thread-safe.
   */
  static void
  compile_method (MonoAotCompile *acfg, MonoMethod *method)
  {
  	MonoCompile *cfg;
  	MonoJumpInfo *patch_info;
  	gboolean skip;
  	int index, depth;
  	MonoMethod *wrapped;
  	JitFlags flags;
  
  	if (acfg->aot_opts.metadata_only)
  		return;
  
  	mono_acfg_lock (acfg);
  	index = get_method_index (acfg, method);
  	mono_acfg_unlock (acfg);
  
  	/* fixme: maybe we can also precompile wrapper methods */
  	if ((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
  		(method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
  		(method->flags & METHOD_ATTRIBUTE_ABSTRACT)) {
  		//printf ("Skip (impossible): %s\n", mono_method_full_name (method, TRUE));
  		return;
  	}
  
  	if (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)
  		return;
  
  	wrapped = mono_marshal_method_from_wrapper (method);
  	if (wrapped && (wrapped->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) && wrapped->is_generic)
  		// FIXME: The wrapper should be generic too, but it is not
  		return;
  
  	if (method->wrapper_type == MONO_WRAPPER_COMINTEROP)
  		return;
  
  	InterlockedIncrement (&acfg->stats.mcount);
  
  #if 0
  	if (method->is_generic || method->klass->generic_container) {
  		InterlockedIncrement (&acfg->stats.genericcount);
  		return;
  	}
  #endif
  
  	//acfg->aot_opts.print_skipped_methods = TRUE;
  
  	/*
  	 * Since these methods are the only ones which are compiled with
  	 * AOT support, and they are not used by runtime startup/shutdown code,
  	 * the runtime will not see AOT methods during AOT compilation,so it
  	 * does not need to support them by creating a fake GOT etc.
  	 */
  	flags = JIT_FLAG_AOT;
  	if (acfg->aot_opts.full_aot)
  		flags |= JIT_FLAG_FULL_AOT;
  	if (acfg->llvm)
  		flags |= JIT_FLAG_LLVM;
  	cfg = mini_method_compile (method, acfg->opts, mono_get_root_domain (), flags, 0);
  	mono_loader_clear_error ();
  
  	if (cfg->exception_type == MONO_EXCEPTION_GENERIC_SHARING_FAILED) {
  		if (acfg->aot_opts.print_skipped_methods)
  			printf ("Skip (gshared failure): %s (%s)\n", mono_method_full_name (method, TRUE), cfg->exception_message);
  		InterlockedIncrement (&acfg->stats.genericcount);
  		return;
  	}
  	if (cfg->exception_type != MONO_EXCEPTION_NONE) {
  		if (acfg->aot_opts.print_skipped_methods)
  			printf ("Skip (JIT failure): %s\n", mono_method_full_name (method, TRUE));
  		/* Let the exception happen at runtime */
  		return;
  	}
  
  	if (cfg->disable_aot) {
  		if (acfg->aot_opts.print_skipped_methods)
  			printf ("Skip (disabled): %s\n", mono_method_full_name (method, TRUE));
  		InterlockedIncrement (&acfg->stats.ocount);
  		mono_destroy_compile (cfg);
  		return;
  	}
  	cfg->method_index = index;
  
  	/* Nullify patches which need no aot processing */
  	for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
  		switch (patch_info->type) {
  		case MONO_PATCH_INFO_LABEL:
  		case MONO_PATCH_INFO_BB:
  			patch_info->type = MONO_PATCH_INFO_NONE;
  			break;
  		default:
  			break;
  		}
  	}
  
  	/* Collect method->token associations from the cfg */
  	mono_acfg_lock (acfg);
  	g_hash_table_foreach (cfg->token_info_hash, add_token_info_hash, acfg);
  	mono_acfg_unlock (acfg);
  	g_hash_table_destroy (cfg->token_info_hash);
  	cfg->token_info_hash = NULL;
  
  	/*
  	 * Check for absolute addresses.
  	 */
  	skip = FALSE;
  	for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
  		switch (patch_info->type) {
  		case MONO_PATCH_INFO_ABS:
  			/* unable to handle this */
  			skip = TRUE;	
  			break;
  		default:
  			break;
  		}
  	}
  
  	if (skip) {
  		if (acfg->aot_opts.print_skipped_methods)
  			printf ("Skip (abs call): %s\n", mono_method_full_name (method, TRUE));
  		InterlockedIncrement (&acfg->stats.abscount);
  		mono_destroy_compile (cfg);
  		return;
  	}
  
  	/* Lock for the rest of the code */
  	mono_acfg_lock (acfg);
  
  	/*
  	 * Check for methods/klasses we can't encode.
  	 */
  	skip = FALSE;
  	for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
  		if (!can_encode_patch (acfg, patch_info))
  			skip = TRUE;
  	}
  
  	if (skip) {
  		if (acfg->aot_opts.print_skipped_methods)
  			printf ("Skip (patches): %s\n", mono_method_full_name (method, TRUE));
  		acfg->stats.ocount++;
  		mono_destroy_compile (cfg);
  		mono_acfg_unlock (acfg);
  		return;
  	}
  
  	if (method->is_inflated && acfg->aot_opts.log_instances) {
  		if (acfg->instances_logfile)
  			fprintf (acfg->instances_logfile, "%s ### %d\n", mono_method_full_name (method, TRUE), cfg->code_size);
  		else
  			printf ("%s ### %d\n", mono_method_full_name (method, TRUE), cfg->code_size);
  	}
  
  	/* Adds generic instances referenced by this method */
  	/* 
  	 * The depth is used to avoid infinite loops when generic virtual recursion is 
  	 * encountered.
  	 */
  	depth = GPOINTER_TO_UINT (g_hash_table_lookup (acfg->method_depth, method));
  	if (!acfg->aot_opts.no_instances && depth < 32) {
  		for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
  			switch (patch_info->type) {
  			case MONO_PATCH_INFO_METHOD: {
  				MonoMethod *m = patch_info->data.method;
  				if (m->is_inflated) {
  					if (!(mono_class_generic_sharing_enabled (m->klass) &&
  						  mono_method_is_generic_sharable_full (m, FALSE, FALSE, FALSE)) &&
  						!method_has_type_vars (m)) {
  						if (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
  							if (acfg->aot_opts.full_aot)
  								add_extra_method_with_depth (acfg, mono_marshal_get_native_wrapper (m, TRUE, TRUE), depth + 1);
  						} else {
  							add_extra_method_with_depth (acfg, m, depth + 1);
  							add_types_from_method_header (acfg, m);
  						}
  					}
  					add_generic_class_with_depth (acfg, m->klass, depth + 5, "method");
  				}
  				if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED && !strcmp (m->name, "ElementAddr"))
  					add_extra_method_with_depth (acfg, m, depth + 1);
  				break;
  			}
  			case MONO_PATCH_INFO_VTABLE: {
  				MonoClass *klass = patch_info->data.klass;
  
  				if (klass->generic_class && !mini_class_is_generic_sharable (klass))
  					add_generic_class_with_depth (acfg, klass, depth + 5, "vtable");
  				break;
  			}
  			case MONO_PATCH_INFO_SFLDA: {
  				MonoClass *klass = patch_info->data.field->parent;
  
  				/* The .cctor needs to run at runtime. */
  				if (klass->generic_class && !mono_generic_context_is_sharable (&klass->generic_class->context, FALSE) && mono_class_get_cctor (klass))
  					add_extra_method_with_depth (acfg, mono_class_get_cctor (klass), depth + 1);
  				break;
  			}
  			default:
  				break;
  			}
  		}
  	}
  
  	/* Determine whenever the method has GOT slots */
  	for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
  		switch (patch_info->type) {
  		case MONO_PATCH_INFO_GOT_OFFSET:
  		case MONO_PATCH_INFO_NONE:
  		case MONO_PATCH_INFO_GC_CARD_TABLE_ADDR:
  			break;
  		case MONO_PATCH_INFO_IMAGE:
  			/* The assembly is stored in GOT slot 0 */
  			if (patch_info->data.image != acfg->image)
  				cfg->has_got_slots = TRUE;
  			break;
  		default:
  			if (!is_plt_patch (patch_info))
  				cfg->has_got_slots = TRUE;
  			break;
  		}
  	}
  
  	if (!cfg->has_got_slots)
  		InterlockedIncrement (&acfg->stats.methods_without_got_slots);
  
  	/* 
  	 * FIXME: Instead of this mess, allocate the patches from the aot mempool.
  	 */
  	/* Make a copy of the patch info which is in the mempool */
  	{
  		MonoJumpInfo *patches = NULL, *patches_end = NULL;
  
  		for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
  			MonoJumpInfo *new_patch_info = mono_patch_info_dup_mp (acfg->mempool, patch_info);
  
  			if (!patches)
  				patches = new_patch_info;
  			else
  				patches_end->next = new_patch_info;
  			patches_end = new_patch_info;
  		}
  		cfg->patch_info = patches;
  	}
  	/* Make a copy of the unwind info */
  	{
  		GSList *l, *unwind_ops;
  		MonoUnwindOp *op;
  
  		unwind_ops = NULL;
  		for (l = cfg->unwind_ops; l; l = l->next) {
  			op = mono_mempool_alloc (acfg->mempool, sizeof (MonoUnwindOp));
  			memcpy (op, l->data, sizeof (MonoUnwindOp));
  			unwind_ops = g_slist_prepend_mempool (acfg->mempool, unwind_ops, op);
  		}
  		cfg->unwind_ops = g_slist_reverse (unwind_ops);
  	}
  	/* Make a copy of the argument/local info */
  	{
  		MonoInst **args, **locals;
  		MonoMethodSignature *sig;
  		MonoMethodHeader *header;
  		int i;
  		
  		sig = mono_method_signature (method);
  		args = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst*) * (sig->param_count + sig->hasthis));
  		for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
  			args [i] = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst));
  			memcpy (args [i], cfg->args [i], sizeof (MonoInst));
  		}
  		cfg->args = args;
  
  		header = mono_method_get_header (method);
  		locals = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst*) * header->num_locals);
  		for (i = 0; i < header->num_locals; ++i) {
  			locals [i] = mono_mempool_alloc (acfg->mempool, sizeof (MonoInst));
  			memcpy (locals [i], cfg->locals [i], sizeof (MonoInst));
  		}
  		cfg->locals = locals;
  	}
  
  	/* Free some fields used by cfg to conserve memory */
  	mono_mempool_destroy (cfg->mempool);
  	cfg->mempool = NULL;
  	g_free (cfg->varinfo);
  	cfg->varinfo = NULL;
  	g_free (cfg->vars);
  	cfg->vars = NULL;
  	if (cfg->rs) {
  		mono_regstate_free (cfg->rs);
  		cfg->rs = NULL;
  	}
  
  	//printf ("Compile:           %s\n", mono_method_full_name (method, TRUE));
  
  	while (index >= acfg->cfgs_size) {
  		MonoCompile **new_cfgs;
  		int new_size;
  
  		new_size = acfg->cfgs_size * 2;
  		new_cfgs = g_new0 (MonoCompile*, new_size);
  		memcpy (new_cfgs, acfg->cfgs, sizeof (MonoCompile*) * acfg->cfgs_size);
  		g_free (acfg->cfgs);
  		acfg->cfgs = new_cfgs;
  		acfg->cfgs_size = new_size;
  	}
  	acfg->cfgs [index] = cfg;
  
  	g_hash_table_insert (acfg->method_to_cfg, cfg->orig_method, cfg);
  
  	/*
  	if (cfg->orig_method->wrapper_type)
  		g_ptr_array_add (acfg->extra_methods, cfg->orig_method);
  	*/
  
  	mono_acfg_unlock (acfg);
  
  	InterlockedIncrement (&acfg->stats.ccount);
  }
   
  static void
  compile_thread_main (gpointer *user_data)
  {
  	MonoDomain *domain = user_data [0];
  	MonoAotCompile *acfg = user_data [1];
  	GPtrArray *methods = user_data [2];
  	int i;
  
  	mono_thread_attach (domain);
  
  	for (i = 0; i < methods->len; ++i)
  		compile_method (acfg, g_ptr_array_index (methods, i));
  }
  
  static void
  load_profile_files (MonoAotCompile *acfg)
  {
  	FILE *infile;
  	char *tmp;
  	int file_index, res, method_index, i;
  	char ver [256];
  	guint32 token;
  	GList *unordered, *l;
  	gboolean found;
  
  	file_index = 0;
  	while (TRUE) {
  		tmp = g_strdup_printf ("%s/.mono/aot-profile-data/%s-%d", g_get_home_dir (), acfg->image->assembly_name, file_index);
  
  		if (!g_file_test (tmp, G_FILE_TEST_IS_REGULAR)) {
  			g_free (tmp);
  			break;
  		}
  
  		infile = fopen (tmp, "r");
  		g_assert (infile);
  
  		printf ("Using profile data file '%s'\n", tmp);
  		g_free (tmp);
  
  		file_index ++;
  
  		res = fscanf (infile, "%32s\n", ver);
  		if ((res != 1) || strcmp (ver, "#VER:2") != 0) {
  			printf ("Profile file has wrong version or invalid.\n");
  			fclose (infile);
  			continue;
  		}
  
  		while (TRUE) {
  			char name [1024];
  			MonoMethodDesc *desc;
  			MonoMethod *method;
  
  			if (fgets (name, 1023, infile) == NULL)
  				break;
  
  			/* Kill the newline */
  			if (strlen (name) > 0)
  				name [strlen (name) - 1] = '\0';
  
  			desc = mono_method_desc_new (name, TRUE);
  
  			method = mono_method_desc_search_in_image (desc, acfg->image);
  
  			if (method && mono_method_get_token (method)) {
  				token = mono_method_get_token (method);
  				method_index = mono_metadata_token_index (token) - 1;
  
  				found = FALSE;
  				for (i = 0; i < acfg->method_order->len; ++i) {
  					if (g_ptr_array_index (acfg->method_order, i) == GUINT_TO_POINTER (method_index)) {
  						found = TRUE;
  						break;
  					}
  				}
  				if (!found)
  					g_ptr_array_add (acfg->method_order, GUINT_TO_POINTER (method_index));
  			} else {
  				//printf ("No method found matching '%s'.\n", name);
  			}
  		}
  		fclose (infile);
  	}
  
  	/* Add missing methods */
  	unordered = NULL;
  	for (method_index = 0; method_index < acfg->image->tables [MONO_TABLE_METHOD].rows; ++method_index) {
  		found = FALSE;
  		for (i = 0; i < acfg->method_order->len; ++i) {
  			if (g_ptr_array_index (acfg->method_order, i) == GUINT_TO_POINTER (method_index)) {
  				found = TRUE;
  				break;
  			}
  		}
  		if (!found)
  			unordered = g_list_prepend (unordered, GUINT_TO_POINTER (method_index));
  	}
  	unordered = g_list_reverse (unordered);
  	for (l = unordered; l; l = l->next)
  		g_ptr_array_add (acfg->method_order, l->data);
  }
   
  /* Used by the LLVM backend */
  guint32
  mono_aot_get_got_offset (MonoJumpInfo *ji)
  {
  	return get_got_offset (llvm_acfg, ji);
  }
  
  char*
  mono_aot_get_method_name (MonoCompile *cfg)
  {
  	if (llvm_acfg->aot_opts.static_link)
  		/* Include the assembly name too to avoid duplicate symbol errors */
  		return g_strdup_printf ("%s_%s", llvm_acfg->assembly_name_sym, get_debug_sym (cfg->orig_method, "", llvm_acfg->method_label_hash));
  	else
  		return get_debug_sym (cfg->orig_method, "", llvm_acfg->method_label_hash);
  }
  
  gboolean
  mono_aot_is_direct_callable (MonoJumpInfo *patch_info)
  {
  	return is_direct_callable (llvm_acfg, NULL, patch_info);
  }
  
  void
  mono_aot_mark_unused_llvm_plt_entry (MonoJumpInfo *patch_info)
  {
  	MonoPltEntry *plt_entry;
  
  	plt_entry = get_plt_entry (llvm_acfg, patch_info);
  	plt_entry->llvm_used = FALSE;
  }
  
  char*
  mono_aot_get_plt_symbol (MonoJumpInfoType type, gconstpointer data)
  {
  	MonoJumpInfo *ji = mono_mempool_alloc (llvm_acfg->mempool, sizeof (MonoJumpInfo));
  	MonoPltEntry *plt_entry;
  
  	ji->type = type;
  	ji->data.target = data;
  
  	if (!can_encode_patch (llvm_acfg, ji))
  		return NULL;
  
  	plt_entry = get_plt_entry (llvm_acfg, ji);
  	plt_entry->llvm_used = TRUE;
  
  #if defined(TARGET_MACH)
  	return g_strdup_printf (plt_entry->llvm_symbol + strlen (llvm_acfg->llvm_label_prefix));
  #else
  	return g_strdup_printf (plt_entry->llvm_symbol);
  #endif
  }
  
  int
  mono_aot_get_method_index (MonoMethod *method)
  {
  	g_assert (llvm_acfg);
  	return get_method_index (llvm_acfg, method);
  }
  
  MonoJumpInfo*
  mono_aot_patch_info_dup (MonoJumpInfo* ji)
  {
  	MonoJumpInfo *res;
  
  	mono_acfg_lock (llvm_acfg);
  	res = mono_patch_info_dup_mp (llvm_acfg->mempool, ji);
  	mono_acfg_unlock (llvm_acfg);
  
  	return res;
  }
  
  #ifdef ENABLE_LLVM
  
  /*
   * emit_llvm_file:
   *
   *   Emit the LLVM code into an LLVM bytecode file, and compile it using the LLVM
   * tools.
   */
  static gboolean
  emit_llvm_file (MonoAotCompile *acfg)
  {
  	char *command, *opts, *tempbc;
  	int i;
  	MonoJumpInfo *patch_info;
  
  	/*
  	 * When using LLVM, we let llvm emit the got since the LLVM IL needs to refer
  	 * to it.
  	 */
  
  	/* Compute the final size of the got */
  	for (i = 0; i < acfg->nmethods; ++i) {
  		if (acfg->cfgs [i]) {
  			for (patch_info = acfg->cfgs [i]->patch_info; patch_info; patch_info = patch_info->next) {
  				if (patch_info->type != MONO_PATCH_INFO_NONE) {
  					if (!is_plt_patch (patch_info))
  						get_got_offset (acfg, patch_info);
  					else
  						get_plt_entry (acfg, patch_info);
  				}
  			}
  		}
  	}
  
  	acfg->final_got_size = acfg->got_offset + acfg->plt_offset;
  
  	if (acfg->aot_opts.full_aot) {
  		int ntype;
  
  		/* 
  		 * Need to add the got entries used by the trampolines.
  		 * This is only a conservative approximation.
  		 */
  		if (strcmp (acfg->image->assembly->aname.name, "mscorlib") == 0) {
  			/* For the generic + rgctx trampolines */
  			acfg->final_got_size += 400;
  			/* For the specific trampolines */
  			for (ntype = 0; ntype < MONO_AOT_TRAMP_NUM; ++ntype)
  				acfg->final_got_size += acfg->num_trampolines [ntype] * 2;
  		}
  	}
  
  
  	tempbc = g_strdup_printf ("%s.bc", acfg->tmpbasename);
  	mono_llvm_emit_aot_module (tempbc, g_path_get_basename (acfg->image->name), acfg->final_got_size);
  	g_free (tempbc);
  
  	/*
  	 * FIXME: Experiment with adding optimizations, the -std-compile-opts set takes
  	 * a lot of time, and doesn't seem to save much space.
  	 * The following optimizations cannot be enabled:
  	 * - 'tailcallelim'
  	 * - 'jump-threading' changes our blockaddress references to int constants.
  	 * - 'basiccg' fails because it contains:
  	 * if (CS && !isa<IntrinsicInst>(II)) {
  	 * and isa<IntrinsicInst> is false for invokes to intrinsics (iltests.exe).
  	 * - 'prune-eh' and 'functionattrs' depend on 'basiccg'.
  	 * The opt list below was produced by taking the output of:
  	 * llvm-as < /dev/null | opt -O2 -disable-output -debug-pass=Arguments
  	 * then removing tailcallelim + the global opts.
  	 * strip-dead-prototypes deletes unused intrinsics definitions.
  	 */
  	opts = g_strdup ("-instcombine -simplifycfg");
  	//opts = g_strdup ("-simplifycfg -domtree -domfrontier -scalarrepl -instcombine -simplifycfg -domtree -domfrontier -scalarrepl -simplify-libcalls -instcombine -simplifycfg -instcombine -simplifycfg -reassociate -domtree -loops -loop-simplify -domfrontier -loop-simplify -lcssa -loop-rotate -licm -lcssa -loop-unswitch -instcombine -scalar-evolution -loop-simplify -lcssa -iv-users -indvars -loop-deletion -loop-simplify -lcssa -loop-unroll -instcombine -memdep -gvn -memdep -memcpyopt -sccp -instcombine -domtree -memdep -dse -adce -simplifycfg -domtree -verify");
  	/* The dse pass is disabled because of #13734 and #17616 */
  	/*
  	 * The dse bug is in DeadStoreElimination.cpp:isOverwrite ():
  	 * // If we have no DataLayout information around, then the size of the store
  	 *  // is inferrable from the pointee type.  If they are the same type, then
  	 * // we know that the store is safe.
  	 * if (AA.getDataLayout() == 0 &&
  	 * Later.Ptr->getType() == Earlier.Ptr->getType()) {
  	 * return OverwriteComplete;
  	 * Here, if 'Earlier' refers to a memset, and Later has no size info, it mistakenly thinks the memset is redundant.
  	 */
  	opts = g_strdup ("-targetlibinfo -no-aa -basicaa -notti -instcombine -simplifycfg -sroa -domtree -early-cse -lazy-value-info -correlated-propagation -simplifycfg -instcombine -simplifycfg -reassociate -domtree -loops -loop-simplify -lcssa -loop-rotate -licm -lcssa -loop-unswitch -instcombine -scalar-evolution -loop-simplify -lcssa -indvars -loop-idiom -loop-deletion -loop-unroll -memdep -gvn -memdep -memcpyopt -sccp -instcombine -lazy-value-info -correlated-propagation -domtree -memdep -adce -simplifycfg -instcombine -strip-dead-prototypes -domtree -verify");
  #if 1
  	command = g_strdup_printf ("%sopt -f %s -o \"%s.opt.bc\" \"%s.bc\"", acfg->aot_opts.llvm_path, opts, acfg->tmpbasename, acfg->tmpbasename);
  	aot_printf (acfg, "Executing opt: %s\n", command);
  	if (system (command) != 0)
  		return FALSE;
  #endif
  	g_free (opts);
  
  	if (!acfg->llc_args)
  		acfg->llc_args = g_string_new ("");
  
  	/* Verbose asm slows down llc greatly */
  	g_string_append (acfg->llc_args, " -asm-verbose=false");
  
  	if (acfg->aot_opts.mtriple)
  		g_string_append_printf (acfg->llc_args, " -mtriple=%s", acfg->aot_opts.mtriple);
  
  #if defined(TARGET_MACH) && defined(TARGET_ARM)
  	/* ios requires PIC code now */
  	g_string_append_printf (acfg->llc_args, " -relocation-model=pic");
  #else
  	if (llvm_acfg->aot_opts.static_link)
  		g_string_append_printf (acfg->llc_args, " -relocation-model=static");
  	else
  		g_string_append_printf (acfg->llc_args, " -relocation-model=pic");
  #endif
  	unlink (acfg->tmpfname);
  
  	command = g_strdup_printf ("%sllc %s -disable-gnu-eh-frame -enable-mono-eh-frame -o \"%s\" \"%s.opt.bc\"", acfg->aot_opts.llvm_path, acfg->llc_args->str, acfg->tmpfname, acfg->tmpbasename);
  
  	aot_printf (acfg, "Executing llc: %s\n", command);
  
  	if (system (command) != 0)
  		return FALSE;
  	return TRUE;
  }
  #endif
  
  static void
  emit_code (MonoAotCompile *acfg)
  {
  	int oindex, i, prev_index;
  	char symbol [256];
  
  #if defined(TARGET_POWERPC64)
  	sprintf (symbol, ".Lgot_addr");
  	emit_section_change (acfg, ".text", 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  	emit_pointer (acfg, acfg->got_symbol);
  #endif
  
  	/* 
  	 * This global symbol is used to compute the address of each method using the
  	 * code_offsets array. It is also used to compute the memory ranges occupied by
  	 * AOT code, so it must be equal to the address of the first emitted method.
  	 */
  	emit_section_change (acfg, ".text", 0);
  	emit_alignment (acfg, 8);
  	if (acfg->llvm) {
  		for (i = 0; i < acfg->nmethods; ++i) {
  			if (acfg->cfgs [i] && acfg->cfgs [i]->compile_llvm) {
  				acfg->methods_symbol = g_strdup (acfg->cfgs [i]->asm_symbol);
  				break;
  			}
  		}
  	}
  	if (!acfg->methods_symbol) {
  		sprintf (symbol, "methods");
  		emit_label (acfg, symbol);
  		acfg->methods_symbol = g_strdup (symbol);
  	}
  
  	/* 
  	 * Emit some padding so the local symbol for the first method doesn't have the
  	 * same address as 'methods'.
  	 */
  #if defined(__default_codegen__)
  	emit_zero_bytes (acfg, 16);
  #elif defined(__native_client_codegen__)
  	{
  		const int kPaddingSize = 16;
  		guint8 pad_buffer[kPaddingSize];
  		mono_arch_nacl_pad (pad_buffer, kPaddingSize);
  		emit_bytes (acfg, pad_buffer, kPaddingSize);
  	}
  #endif
  
  	for (oindex = 0; oindex < acfg->method_order->len; ++oindex) {
  		MonoCompile *cfg;
  		MonoMethod *method;
  
  		i = GPOINTER_TO_UINT (g_ptr_array_index (acfg->method_order, oindex));
  
  		cfg = acfg->cfgs [i];
  
  		if (!cfg)
  			continue;
  
  		method = cfg->orig_method;
  
  		/* Emit unbox trampoline */
  		if (acfg->aot_opts.full_aot && cfg->orig_method->klass->valuetype) {
  			sprintf (symbol, "ut_%d", get_method_index (acfg, method));
  
  			emit_section_change (acfg, ".text", 0);
  #ifdef __native_client_codegen__
  			emit_alignment (acfg, AOT_FUNC_ALIGNMENT);
  #endif
  
  			if (acfg->thumb_mixed && cfg->compile_llvm) {
  				emit_set_thumb_mode (acfg);
  				fprintf (acfg->fp, "\n.thumb_func\n");
  			}
  
  			emit_label (acfg, symbol);
  
  			arch_emit_unbox_trampoline (acfg, cfg, cfg->orig_method, cfg->asm_symbol);
  
  			if (acfg->thumb_mixed && cfg->compile_llvm) {
  				emit_set_arm_mode (acfg);
  			}
  		}
  
  		if (cfg->compile_llvm)
  			acfg->stats.llvm_count ++;
  		else
  			emit_method_code (acfg, cfg);
  	}
  
  	sprintf (symbol, "methods_end");
  	emit_section_change (acfg, ".text", 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  	/* To distinguish it from the next symbol */
  	emit_int32 (acfg, 0);
  
  	/* 
  	 * Add .no_dead_strip directives for all LLVM methods to prevent the OSX linker
  	 * from optimizing them away, since it doesn't see that code_offsets references them.
  	 * JITted methods don't need this since they are referenced using assembler local
  	 * symbols.
  	 * FIXME: This is why write-symbols doesn't work on OSX ?
  	 */
  	if (acfg->llvm && acfg->need_no_dead_strip) {
  		fprintf (acfg->fp, "\n");
  		for (i = 0; i < acfg->nmethods; ++i) {
  			if (acfg->cfgs [i] && acfg->cfgs [i]->compile_llvm)
  				fprintf (acfg->fp, ".no_dead_strip %s\n", acfg->cfgs [i]->asm_symbol);
  		}
  	}
  
  	if (acfg->direct_method_addresses) {
  		acfg->flags |= MONO_AOT_FILE_FLAG_DIRECT_METHOD_ADDRESSES;
  
  		/*
  		 * To work around linker issues, we emit a table of branches, and disassemble them at runtime.
  		 * This is PIE code, and the linker can update it if needed.
  		 */
  		sprintf (symbol, "method_addresses");
  		emit_section_change (acfg, ".text", 1);
  		emit_alignment (acfg, 8);
  		emit_label (acfg, symbol);
  		emit_local_symbol (acfg, symbol, "method_addresses_end", TRUE);
  		emit_unset_mode (acfg);
  		if (acfg->need_no_dead_strip)
  			fprintf (acfg->fp, "	.no_dead_strip %s\n", symbol);
  
  		for (i = 0; i < acfg->nmethods; ++i) {
  #ifdef MONO_ARCH_AOT_SUPPORTED
  			int call_size;
  
  			if (acfg->cfgs [i])
  				arch_emit_direct_call (acfg, acfg->cfgs [i]->asm_symbol, FALSE, acfg->thumb_mixed && acfg->cfgs [i]->compile_llvm, NULL, &call_size);
  			else
  				arch_emit_direct_call (acfg, "method_addresses", FALSE, FALSE, NULL, &call_size);
  #endif
  		}
  
  		sprintf (symbol, "method_addresses_end");
  		emit_label (acfg, symbol);
  
  		/* Empty */
  		sprintf (symbol, "code_offsets");
  		emit_section_change (acfg, RODATA_SECT, 1);
  		emit_alignment (acfg, 8);
  		emit_label (acfg, symbol);
  		emit_int32 (acfg, 0);
  	} else {
  		sprintf (symbol, "code_offsets");
  		emit_section_change (acfg, RODATA_SECT, 1);
  		emit_alignment (acfg, 8);
  		emit_label (acfg, symbol);
  
  		acfg->stats.offsets_size += acfg->nmethods * 4;
  
  		for (i = 0; i < acfg->nmethods; ++i) {
  			if (acfg->cfgs [i]) {
  				emit_symbol_diff (acfg, acfg->cfgs [i]->asm_symbol, acfg->methods_symbol, 0);
  			} else {
  				emit_int32 (acfg, 0xffffffff);
  			}
  		}
  	}
  	emit_line (acfg);
  
  	/* Emit a sorted table mapping methods to their unbox trampolines */
  	sprintf (symbol, "unbox_trampolines");
  	if (acfg->direct_method_addresses)
  		emit_section_change (acfg, ".text", 0);
  	else
  		emit_section_change (acfg, RODATA_SECT, 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	prev_index = -1;
  	for (i = 0; i < acfg->nmethods; ++i) {
  		MonoCompile *cfg;
  		MonoMethod *method;
  		int index;
  
  		cfg = acfg->cfgs [i];
  		if (!cfg)
  			continue;
  
  		method = cfg->orig_method;
  
  		if (acfg->aot_opts.full_aot && cfg->orig_method->klass->valuetype) {
  #ifdef MONO_ARCH_AOT_SUPPORTED
  			int call_size;
  #endif
  
  			index = get_method_index (acfg, method);
  			sprintf (symbol, "ut_%d", index);
  
  			emit_int32 (acfg, index);
  			if (acfg->direct_method_addresses) {
  #ifdef MONO_ARCH_AOT_SUPPORTED
  				arch_emit_direct_call (acfg, symbol, FALSE, acfg->thumb_mixed && cfg->compile_llvm, NULL, &call_size);
  #endif
  			} else {
  				emit_symbol_diff (acfg, symbol, acfg->methods_symbol, 0);
  			}
  			/* Make sure the table is sorted by index */
  			g_assert (index > prev_index);
  			prev_index = index;
  		}
  	}
  	sprintf (symbol, "unbox_trampolines_end");
  	emit_label (acfg, symbol);
  	emit_int32 (acfg, 0);
  }
  
  static void
  emit_info (MonoAotCompile *acfg)
  {
  	int oindex, i;
  	char symbol [256];
  	gint32 *offsets;
  
  	offsets = g_new0 (gint32, acfg->nmethods);
  
  	for (oindex = 0; oindex < acfg->method_order->len; ++oindex) {
  		i = GPOINTER_TO_UINT (g_ptr_array_index (acfg->method_order, oindex));
  
  		if (acfg->cfgs [i]) {
  			emit_method_info (acfg, acfg->cfgs [i]);
  			offsets [i] = acfg->cfgs [i]->method_info_offset;
  		} else {
  			offsets [i] = 0;
  		}
  	}
  
  	sprintf (symbol, "method_info_offsets");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	acfg->stats.offsets_size += emit_offset_table (acfg, acfg->nmethods, 10, offsets);
  
  	g_free (offsets);
  }
  
  #endif /* #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT) */
  
  #define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
  #define mix(a,b,c) { \
  	a -= c;  a ^= rot(c, 4);  c += b; \
  	b -= a;  b ^= rot(a, 6);  a += c; \
  	c -= b;  c ^= rot(b, 8);  b += a; \
  	a -= c;  a ^= rot(c,16);  c += b; \
  	b -= a;  b ^= rot(a,19);  a += c; \
  	c -= b;  c ^= rot(b, 4);  b += a; \
  }
  #define final(a,b,c) { \
  	c ^= b; c -= rot(b,14); \
  	a ^= c; a -= rot(c,11); \
  	b ^= a; b -= rot(a,25); \
  	c ^= b; c -= rot(b,16); \
  	a ^= c; a -= rot(c,4);  \
  	b ^= a; b -= rot(a,14); \
  	c ^= b; c -= rot(b,24); \
  }
  
  static guint
  mono_aot_type_hash (MonoType *t1)
  {
  	guint hash = t1->type;
  
  	hash |= t1->byref << 6; /* do not collide with t1->type values */
  	switch (t1->type) {
  	case MONO_TYPE_VALUETYPE:
  	case MONO_TYPE_CLASS:
  	case MONO_TYPE_SZARRAY:
  		/* check if the distribution is good enough */
  		return ((hash << 5) - hash) ^ mono_metadata_str_hash (t1->data.klass->name);
  	case MONO_TYPE_PTR:
  		return ((hash << 5) - hash) ^ mono_metadata_type_hash (t1->data.type);
  	case MONO_TYPE_ARRAY:
  		return ((hash << 5) - hash) ^ mono_metadata_type_hash (&t1->data.array->eklass->byval_arg);
  	case MONO_TYPE_GENERICINST:
  		return ((hash << 5) - hash) ^ 0;
  	default:
  		return hash;
  	}
  }
  
  /*
   * mono_aot_method_hash:
   *
   *   Return a hash code for methods which only depends on metadata.
   */
  guint32
  mono_aot_method_hash (MonoMethod *method)
  {
  	MonoMethodSignature *sig;
  	MonoClass *klass;
  	int i, hindex;
  	int hashes_count;
  	guint32 *hashes_start, *hashes;
  	guint32 a, b, c;
  	MonoGenericInst *ginst = NULL;
  
  	/* Similar to the hash in mono_method_get_imt_slot () */
  
  	sig = mono_method_signature (method);
  
  	if (method->is_inflated)
  		ginst = ((MonoMethodInflated*)method)->context.method_inst;
  
  	hashes_count = sig->param_count + 5 + (ginst ? ginst->type_argc : 0);
  	hashes_start = g_malloc0 (hashes_count * sizeof (guint32));
  	hashes = hashes_start;
  
  	/* Some wrappers are assigned to random classes */
  	if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)
  		klass = method->klass;
  	else
  		klass = mono_defaults.object_class;
  
  	if (!method->wrapper_type) {
  		char *full_name = mono_type_full_name (&klass->byval_arg);
  
  		hashes [0] = mono_metadata_str_hash (full_name);
  		hashes [1] = 0;
  		g_free (full_name);
  	} else {
  		hashes [0] = mono_metadata_str_hash (klass->name);
  		hashes [1] = mono_metadata_str_hash (klass->name_space);
  	}
  	if (method->wrapper_type == MONO_WRAPPER_STFLD || method->wrapper_type == MONO_WRAPPER_LDFLD || method->wrapper_type == MONO_WRAPPER_LDFLDA)
  		/* The method name includes a stringified pointer */
  		hashes [2] = 0;
  	else
  		hashes [2] = mono_metadata_str_hash (method->name);
  	hashes [3] = method->wrapper_type;
  	hashes [4] = mono_aot_type_hash (sig->ret);
  	hindex = 5;
  	for (i = 0; i < sig->param_count; i++) {
  		hashes [hindex ++] = mono_aot_type_hash (sig->params [i]);
  	}
  	if (ginst) {
  		for (i = 0; i < ginst->type_argc; ++i)
  			hashes [hindex ++] = mono_aot_type_hash (ginst->type_argv [i]);
  	}		
  	g_assert (hindex == hashes_count);
  
  	/* Setup internal state */
  	a = b = c = 0xdeadbeef + (((guint32)hashes_count)<<2);
  
  	/* Handle most of the hashes */
  	while (hashes_count > 3) {
  		a += hashes [0];
  		b += hashes [1];
  		c += hashes [2];
  		mix (a,b,c);
  		hashes_count -= 3;
  		hashes += 3;
  	}
  
  	/* Handle the last 3 hashes (all the case statements fall through) */
  	switch (hashes_count) { 
  	case 3 : c += hashes [2];
  	case 2 : b += hashes [1];
  	case 1 : a += hashes [0];
  		final (a,b,c);
  	case 0: /* nothing left to add */
  		break;
  	}
  	
  	free (hashes_start);
  	
  	return c;
  }
  #undef rot
  #undef mix
  #undef final
  
  /*
   * mono_aot_get_array_helper_from_wrapper;
   *
   * Get the helper method in Array called by an array wrapper method.
   */
  MonoMethod*
  mono_aot_get_array_helper_from_wrapper (MonoMethod *method)
  {
  	MonoMethod *m;
  	const char *prefix;
  	MonoGenericContext ctx;
  	MonoType *args [16];
  	char *mname, *iname, *s, *s2, *helper_name = NULL;
  
  	prefix = "System.Collections.Generic";
  	s = g_strdup_printf ("%s", method->name + strlen (prefix) + 1);
  	s2 = strstr (s, "`1.");
  	g_assert (s2);
  	s2 [0] = '\0';
  	iname = s;
  	mname = s2 + 3;
  
  	//printf ("X: %s %s\n", iname, mname);
  
  	if (!strcmp (iname, "IList"))
  		helper_name = g_strdup_printf ("InternalArray__%s", mname);
  	else
  		helper_name = g_strdup_printf ("InternalArray__%s_%s", iname, mname);
  	m = mono_class_get_method_from_name (mono_defaults.array_class, helper_name, mono_method_signature (method)->param_count);
  	g_assert (m);
  	g_free (helper_name);
  	g_free (s);
  
  	if (m->is_generic) {
  		memset (&ctx, 0, sizeof (ctx));
  		args [0] = &method->klass->element_class->byval_arg;
  		ctx.method_inst = mono_metadata_get_generic_inst (1, args);
  		m = mono_class_inflate_generic_method (m, &ctx);
  	}
  
  	return m;
  }
  
  #if !defined(DISABLE_AOT) && !defined(DISABLE_JIT)
  
  typedef struct HashEntry {
      guint32 key, value, index;
  	struct HashEntry *next;
  } HashEntry;
  
  /*
   * emit_extra_methods:
   *
   * Emit methods which are not in the METHOD table, like wrappers.
   */
  static void
  emit_extra_methods (MonoAotCompile *acfg)
  {
  	int i, table_size, buf_size;
  	char symbol [256];
  	guint8 *p, *buf;
  	guint32 *info_offsets;
  	guint32 hash;
  	GPtrArray *table;
  	HashEntry *entry, *new_entry;
  	int nmethods, max_chain_length;
  	int *chain_lengths;
  
  	info_offsets = g_new0 (guint32, acfg->extra_methods->len);
  
  	/* Emit method info */
  	nmethods = 0;
  	for (i = 0; i < acfg->extra_methods->len; ++i) {
  		MonoMethod *method = g_ptr_array_index (acfg->extra_methods, i);
  		MonoCompile *cfg = g_hash_table_lookup (acfg->method_to_cfg, method);
  
  		if (!cfg)
  			continue;
  
  		buf_size = 10240;
  		p = buf = g_malloc (buf_size);
  
  		nmethods ++;
  
  		method = cfg->method_to_register;
  
  		encode_method_ref (acfg, method, p, &p);
  
  		g_assert ((p - buf) < buf_size);
  
  		info_offsets [i] = add_to_blob (acfg, buf, p - buf);
  		g_free (buf);
  	}
  
  	/*
  	 * Construct a chained hash table for mapping indexes in extra_method_info to
  	 * method indexes.
  	 */
  	table_size = g_spaced_primes_closest ((int)(nmethods * 1.5));
  	table = g_ptr_array_sized_new (table_size);
  	for (i = 0; i < table_size; ++i)
  		g_ptr_array_add (table, NULL);
  	chain_lengths = g_new0 (int, table_size);
  	max_chain_length = 0;
  	for (i = 0; i < acfg->extra_methods->len; ++i) {
  		MonoMethod *method = g_ptr_array_index (acfg->extra_methods, i);
  		MonoCompile *cfg = g_hash_table_lookup (acfg->method_to_cfg, method);
  		guint32 key, value;
  
  		if (!cfg)
  			continue;
  
  		key = info_offsets [i];
  		value = get_method_index (acfg, method);
  
  		hash = mono_aot_method_hash (method) % table_size;
  		//printf ("X: %s %d\n", mono_method_full_name (method, 1), hash);
  
  		chain_lengths [hash] ++;
  		max_chain_length = MAX (max_chain_length, chain_lengths [hash]);
  
  		new_entry = mono_mempool_alloc0 (acfg->mempool, sizeof (HashEntry));
  		new_entry->key = key;
  		new_entry->value = value;
  
  		entry = g_ptr_array_index (table, hash);
  		if (entry == NULL) {
  			new_entry->index = hash;
  			g_ptr_array_index (table, hash) = new_entry;
  		} else {
  			while (entry->next)
  				entry = entry->next;
  			
  			entry->next = new_entry;
  			new_entry->index = table->len;
  			g_ptr_array_add (table, new_entry);
  		}
  	}
  
  	//printf ("MAX: %d\n", max_chain_length);
  
  	/* Emit the table */
  	sprintf (symbol, "extra_method_table");
  	emit_section_change (acfg, RODATA_SECT, 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	emit_int32 (acfg, table_size);
  	for (i = 0; i < table->len; ++i) {
  		HashEntry *entry = g_ptr_array_index (table, i);
  
  		if (entry == NULL) {
  			emit_int32 (acfg, 0);
  			emit_int32 (acfg, 0);
  			emit_int32 (acfg, 0);
  		} else {
  			//g_assert (entry->key > 0);
  			emit_int32 (acfg, entry->key);
  			emit_int32 (acfg, entry->value);
  			if (entry->next)
  				emit_int32 (acfg, entry->next->index);
  			else
  				emit_int32 (acfg, 0);
  		}
  	}
  
  	/* 
  	 * Emit a table reverse mapping method indexes to their index in extra_method_info.
  	 * This is used by mono_aot_find_jit_info ().
  	 */
  	sprintf (symbol, "extra_method_info_offsets");
  	emit_section_change (acfg, RODATA_SECT, 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	emit_int32 (acfg, acfg->extra_methods->len);
  	for (i = 0; i < acfg->extra_methods->len; ++i) {
  		MonoMethod *method = g_ptr_array_index (acfg->extra_methods, i);
  
  		emit_int32 (acfg, get_method_index (acfg, method));
  		emit_int32 (acfg, info_offsets [i]);
  	}
  }	
  
  static void
  emit_exception_info (MonoAotCompile *acfg)
  {
  	int i;
  	char symbol [256];
  	gint32 *offsets;
  
  	offsets = g_new0 (gint32, acfg->nmethods);
  	for (i = 0; i < acfg->nmethods; ++i) {
  		if (acfg->cfgs [i]) {
  			emit_exception_debug_info (acfg, acfg->cfgs [i]);
  			offsets [i] = acfg->cfgs [i]->ex_info_offset;
  		} else {
  			offsets [i] = 0;
  		}
  	}
  
  	sprintf (symbol, "ex_info_offsets");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	acfg->stats.offsets_size += emit_offset_table (acfg, acfg->nmethods, 10, offsets);
  	g_free (offsets);
  }
  
  static void
  emit_unwind_info (MonoAotCompile *acfg)
  {
  	int i;
  	char symbol [128];
  
  	/* 
  	 * The unwind info contains a lot of duplicates so we emit each unique
  	 * entry once, and only store the offset from the start of the table in the
  	 * exception info.
  	 */
  
  	sprintf (symbol, "unwind_info");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	for (i = 0; i < acfg->unwind_ops->len; ++i) {
  		guint32 index = GPOINTER_TO_UINT (g_ptr_array_index (acfg->unwind_ops, i));
  		guint8 *unwind_info;
  		guint32 unwind_info_len;
  		guint8 buf [16];
  		guint8 *p;
  
  		unwind_info = mono_get_cached_unwind_info (index, &unwind_info_len);
  
  		p = buf;
  		encode_value (unwind_info_len, p, &p);
  		emit_bytes (acfg, buf, p - buf);
  		emit_bytes (acfg, unwind_info, unwind_info_len);
  
  		acfg->stats.unwind_info_size += (p - buf) + unwind_info_len;
  	}
  }
  
  static void
  emit_class_info (MonoAotCompile *acfg)
  {
  	int i;
  	char symbol [256];
  	gint32 *offsets;
  
  	offsets = g_new0 (gint32, acfg->image->tables [MONO_TABLE_TYPEDEF].rows);
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i)
  		offsets [i] = emit_klass_info (acfg, MONO_TOKEN_TYPE_DEF | (i + 1));
  
  	sprintf (symbol, "class_info_offsets");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	acfg->stats.offsets_size += emit_offset_table (acfg, acfg->image->tables [MONO_TABLE_TYPEDEF].rows, 10, offsets);
  	g_free (offsets);
  }
  
  typedef struct ClassNameTableEntry {
  	guint32 token, index;
  	struct ClassNameTableEntry *next;
  } ClassNameTableEntry;
  
  static void
  emit_class_name_table (MonoAotCompile *acfg)
  {
  	int i, table_size;
  	guint32 token, hash;
  	MonoClass *klass;
  	GPtrArray *table;
  	char *full_name;
  	char symbol [256];
  	ClassNameTableEntry *entry, *new_entry;
  
  	/*
  	 * Construct a chained hash table for mapping class names to typedef tokens.
  	 */
  	table_size = g_spaced_primes_closest ((int)(acfg->image->tables [MONO_TABLE_TYPEDEF].rows * 1.5));
  	table = g_ptr_array_sized_new (table_size);
  	for (i = 0; i < table_size; ++i)
  		g_ptr_array_add (table, NULL);
  	for (i = 0; i < acfg->image->tables [MONO_TABLE_TYPEDEF].rows; ++i) {
  		MonoError error;
  		token = MONO_TOKEN_TYPE_DEF | (i + 1);
  		klass = mono_class_get_checked (acfg->image, token, &error);
  		if (!klass) {
  			mono_error_cleanup (&error);
  			continue;
  		}
  		full_name = mono_type_get_name_full (mono_class_get_type (klass), MONO_TYPE_NAME_FORMAT_FULL_NAME);
  		hash = mono_metadata_str_hash (full_name) % table_size;
  		g_free (full_name);
  
  		/* FIXME: Allocate from the mempool */
  		new_entry = g_new0 (ClassNameTableEntry, 1);
  		new_entry->token = token;
  
  		entry = g_ptr_array_index (table, hash);
  		if (entry == NULL) {
  			new_entry->index = hash;
  			g_ptr_array_index (table, hash) = new_entry;
  		} else {
  			while (entry->next)
  				entry = entry->next;
  			
  			entry->next = new_entry;
  			new_entry->index = table->len;
  			g_ptr_array_add (table, new_entry);
  		}
  	}
  
  	/* Emit the table */
  	sprintf (symbol, "class_name_table");
  	emit_section_change (acfg, RODATA_SECT, 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	/* FIXME: Optimize memory usage */
  	g_assert (table_size < 65000);
  	emit_int16 (acfg, table_size);
  	g_assert (table->len < 65000);
  	for (i = 0; i < table->len; ++i) {
  		ClassNameTableEntry *entry = g_ptr_array_index (table, i);
  
  		if (entry == NULL) {
  			emit_int16 (acfg, 0);
  			emit_int16 (acfg, 0);
  		} else {
  			emit_int16 (acfg, mono_metadata_token_index (entry->token));
  			if (entry->next)
  				emit_int16 (acfg, entry->next->index);
  			else
  				emit_int16 (acfg, 0);
  		}
  	}
  }
  
  static void
  emit_image_table (MonoAotCompile *acfg)
  {
  	int i;
  	char symbol [256];
  
  	/*
  	 * The image table is small but referenced in a lot of places.
  	 * So we emit it at once, and reference its elements by an index.
  	 */
  
  	sprintf (symbol, "image_table");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	emit_int32 (acfg, acfg->image_table->len);
  	for (i = 0; i < acfg->image_table->len; i++) {
  		MonoImage *image = (MonoImage*)g_ptr_array_index (acfg->image_table, i);
  		MonoAssemblyName *aname = &image->assembly->aname;
  
  		/* FIXME: Support multi-module assemblies */
  		g_assert (image->assembly->image == image);
  
  		emit_string (acfg, image->assembly_name);
  		emit_string (acfg, image->guid);
  		emit_string (acfg, aname->culture ? aname->culture : "");
  		emit_string (acfg, (const char*)aname->public_key_token);
  
  		emit_alignment (acfg, 8);
  		emit_int32 (acfg, aname->flags);
  		emit_int32 (acfg, aname->major);
  		emit_int32 (acfg, aname->minor);
  		emit_int32 (acfg, aname->build);
  		emit_int32 (acfg, aname->revision);
  	}
  }
  
  static void
  emit_got_info (MonoAotCompile *acfg)
  {
  	char symbol [256];
  	int i, first_plt_got_patch, buf_size;
  	guint8 *p, *buf;
  	guint32 *got_info_offsets;
  
  	/* Add the patches needed by the PLT to the GOT */
  	acfg->plt_got_offset_base = acfg->got_offset;
  	first_plt_got_patch = acfg->got_patches->len;
  	for (i = 1; i < acfg->plt_offset; ++i) {
  		MonoPltEntry *plt_entry = g_hash_table_lookup (acfg->plt_offset_to_entry, GUINT_TO_POINTER (i));
  
  		g_ptr_array_add (acfg->got_patches, plt_entry->ji);
  
  		acfg->stats.got_slot_types [plt_entry->ji->type] ++;
  	}
  
  	acfg->got_offset += acfg->plt_offset;
  
  	/**
  	 * FIXME: 
  	 * - optimize offsets table.
  	 * - reduce number of exported symbols.
  	 * - emit info for a klass only once.
  	 * - determine when a method uses a GOT slot which is guaranteed to be already 
  	 *   initialized.
  	 * - clean up and document the code.
  	 * - use String.Empty in class libs.
  	 */
  
  	/* Encode info required to decode shared GOT entries */
  	buf_size = acfg->got_patches->len * 128;
  	p = buf = mono_mempool_alloc (acfg->mempool, buf_size);
  	got_info_offsets = mono_mempool_alloc (acfg->mempool, acfg->got_patches->len * sizeof (guint32));
  	acfg->plt_got_info_offsets = mono_mempool_alloc (acfg->mempool, acfg->plt_offset * sizeof (guint32));
  	/* Unused */
  	if (acfg->plt_offset)
  		acfg->plt_got_info_offsets [0] = 0;
  	for (i = 0; i < acfg->got_patches->len; ++i) {
  		MonoJumpInfo *ji = g_ptr_array_index (acfg->got_patches, i);
  		guint8 *p2;
  
  		p = buf;
  
  		encode_value (ji->type, p, &p);
  		p2 = p;
  		encode_patch (acfg, ji, p, &p);
  		acfg->stats.got_slot_info_sizes [ji->type] += p - p2;
  		g_assert (p - buf <= buf_size);
  		got_info_offsets [i] = add_to_blob (acfg, buf, p - buf);
  
  		if (i >= first_plt_got_patch)
  			acfg->plt_got_info_offsets [i - first_plt_got_patch + 1] = got_info_offsets [i];
  		acfg->stats.got_info_size += p - buf;
  	}
  
  	/* Emit got_info_offsets table */
  	sprintf (symbol, "got_info_offsets");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	/* No need to emit offsets for the got plt entries, the plt embeds them directly */
  	acfg->stats.offsets_size += emit_offset_table (acfg, first_plt_got_patch, 10, (gint32*)got_info_offsets);
  }
  
  static void
  emit_got (MonoAotCompile *acfg)
  {
  	char symbol [256];
  
  	if (!acfg->llvm) {
  		/* Don't make GOT global so accesses to it don't need relocations */
  		sprintf (symbol, "%s", acfg->got_symbol);
  		emit_section_change (acfg, ".bss", 0);
  		emit_alignment (acfg, 8);
  		emit_local_symbol (acfg, symbol, "got_end", FALSE);
  		emit_label (acfg, symbol);
  		if (acfg->got_offset > 0)
  			emit_zero_bytes (acfg, (int)(acfg->got_offset * sizeof (gpointer)));
  
  		sprintf (symbol, "got_end");
  		emit_label (acfg, symbol);
  	}
  }
  
  typedef struct GlobalsTableEntry {
  	guint32 value, index;
  	struct GlobalsTableEntry *next;
  } GlobalsTableEntry;
  
  static void
  emit_globals (MonoAotCompile *acfg)
  {
  	int i, table_size;
  	guint32 hash;
  	GPtrArray *table;
  	char symbol [256];
  	GlobalsTableEntry *entry, *new_entry;
  
  	if (!acfg->aot_opts.static_link)
  		return;
  
  	/* 
  	 * When static linking, we emit a table containing our globals.
  	 */
  
  	/*
  	 * Construct a chained hash table for mapping global names to their index in
  	 * the globals table.
  	 */
  	table_size = g_spaced_primes_closest ((int)(acfg->globals->len * 1.5));
  	table = g_ptr_array_sized_new (table_size);
  	for (i = 0; i < table_size; ++i)
  		g_ptr_array_add (table, NULL);
  	for (i = 0; i < acfg->globals->len; ++i) {
  		char *name = g_ptr_array_index (acfg->globals, i);
  
  		hash = mono_metadata_str_hash (name) % table_size;
  
  		/* FIXME: Allocate from the mempool */
  		new_entry = g_new0 (GlobalsTableEntry, 1);
  		new_entry->value = i;
  
  		entry = g_ptr_array_index (table, hash);
  		if (entry == NULL) {
  			new_entry->index = hash;
  			g_ptr_array_index (table, hash) = new_entry;
  		} else {
  			while (entry->next)
  				entry = entry->next;
  			
  			entry->next = new_entry;
  			new_entry->index = table->len;
  			g_ptr_array_add (table, new_entry);
  		}
  	}
  
  	/* Emit the table */
  	sprintf (symbol, ".Lglobals_hash");
  	emit_section_change (acfg, RODATA_SECT, 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	/* FIXME: Optimize memory usage */
  	g_assert (table_size < 65000);
  	emit_int16 (acfg, table_size);
  	for (i = 0; i < table->len; ++i) {
  		GlobalsTableEntry *entry = g_ptr_array_index (table, i);
  
  		if (entry == NULL) {
  			emit_int16 (acfg, 0);
  			emit_int16 (acfg, 0);
  		} else {
  			emit_int16 (acfg, entry->value + 1);
  			if (entry->next)
  				emit_int16 (acfg, entry->next->index);
  			else
  				emit_int16 (acfg, 0);
  		}
  	}
  
  	/* Emit the names */
  	for (i = 0; i < acfg->globals->len; ++i) {
  		char *name = g_ptr_array_index (acfg->globals, i);
  
  		sprintf (symbol, "name_%d", i);
  		emit_section_change (acfg, RODATA_SECT, 1);
  #ifdef TARGET_MACH
  		emit_alignment (acfg, 4);
  #endif
  		emit_label (acfg, symbol);
  		emit_string (acfg, name);
  	}
  
  	/* Emit the globals table */
  	sprintf (symbol, "globals");
  	emit_section_change (acfg, ".data", 0);
  	/* This is not a global, since it is accessed by the init function */
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	sprintf (symbol, "%sglobals_hash", acfg->temp_prefix);
  	emit_pointer (acfg, symbol);
  
  	for (i = 0; i < acfg->globals->len; ++i) {
  		char *name = g_ptr_array_index (acfg->globals, i);
  
  		sprintf (symbol, "name_%d", i);
  		emit_pointer (acfg, symbol);
  
  		sprintf (symbol, "%s", name);
  		emit_pointer (acfg, symbol);
  	}
  	/* Null terminate the table */
  	emit_int32 (acfg, 0);
  	emit_int32 (acfg, 0);
  }
  
  static void
  emit_autoreg (MonoAotCompile *acfg)
  {
  	char *symbol;
  
  	/*
  	 * Emit a function into the .ctor section which will be called by the ELF
  	 * loader to register this module with the runtime.
  	 */
  	if (! (!acfg->use_bin_writer && acfg->aot_opts.static_link && acfg->aot_opts.autoreg))
  		return;
  
  	symbol = g_strdup_printf ("_%s_autoreg", acfg->static_linking_symbol);
  
  	arch_emit_autoreg (acfg, symbol);
  
  	g_free (symbol);
  }	
  
  static void
  emit_mem_end (MonoAotCompile *acfg)
  {
  	char symbol [128];
  
  	sprintf (symbol, "mem_end");
  	emit_section_change (acfg, ".text", 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  }
  
  /*
   * Emit a structure containing all the information not stored elsewhere.
   */
  static void
  emit_file_info (MonoAotCompile *acfg)
  {
  	char symbol [256];
  	int i;
  	int gc_name_offset;
  	const char *gc_name;
  	char *build_info;
  
  	emit_string_symbol (acfg, "assembly_guid" , acfg->image->guid);
  
  	if (acfg->aot_opts.bind_to_runtime_version) {
  		build_info = mono_get_runtime_build_info ();
  		emit_string_symbol (acfg, "runtime_version", build_info);
  		g_free (build_info);
  	} else {
  		emit_string_symbol (acfg, "runtime_version", "");
  	}
  
  	/* Emit a string holding the assembly name */
  	emit_string_symbol (acfg, "assembly_name", acfg->image->assembly->aname.name);
  
  	/*
  	 * The managed allocators are GC specific, so can't use an AOT image created by one GC
  	 * in another.
  	 */
  	gc_name = mono_gc_get_gc_name ();
  	gc_name_offset = add_to_blob (acfg, (guint8*)gc_name, strlen (gc_name) + 1);
  
  	sprintf (symbol, "%smono_aot_file_info", acfg->user_symbol_prefix);
  	emit_section_change (acfg, ".data", 0);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  	if (!acfg->aot_opts.static_link)
  		emit_global (acfg, symbol, FALSE);
  
  	/* The data emitted here must match MonoAotFileInfo. */
  
  	emit_int32 (acfg, MONO_AOT_FILE_VERSION);
  	emit_int32 (acfg, 0);
  
  	/* 
  	 * We emit pointers to our data structures instead of emitting global symbols which
  	 * point to them, to reduce the number of globals, and because using globals leads to
  	 * various problems (i.e. arm/thumb).
  	 */
  	emit_pointer (acfg, acfg->got_symbol);
  	emit_pointer (acfg, acfg->methods_symbol);
  	if (acfg->llvm) {
  		/*
  		 * Emit a reference to the mono_eh_frame table created by our modified LLVM compiler.
  		 */
  		emit_pointer (acfg, "mono_eh_frame");
  	} else {
  		emit_pointer (acfg, NULL);
  	}
  	emit_pointer (acfg, "blob");
  	emit_pointer (acfg, "class_name_table");
  	emit_pointer (acfg, "class_info_offsets");
  	emit_pointer (acfg, "method_info_offsets");
  	emit_pointer (acfg, "ex_info_offsets");
  	emit_pointer (acfg, "code_offsets");
  	if (acfg->direct_method_addresses)
  		emit_pointer (acfg, "method_addresses");
  	else
  		emit_pointer (acfg, NULL);
  	emit_pointer (acfg, "extra_method_info_offsets");
  	emit_pointer (acfg, "extra_method_table");
  	emit_pointer (acfg, "got_info_offsets");
  	emit_pointer (acfg, "methods_end");
  	emit_pointer (acfg, "unwind_info");
  	emit_pointer (acfg, "mem_end");
  	emit_pointer (acfg, "image_table");
  	emit_pointer (acfg, "plt");
  	emit_pointer (acfg, "plt_end");
  	emit_pointer (acfg, "assembly_guid");
  	emit_pointer (acfg, "runtime_version");
  	if (acfg->num_trampoline_got_entries) {
  		emit_pointer (acfg, "specific_trampolines");
  		emit_pointer (acfg, "static_rgctx_trampolines");
  		emit_pointer (acfg, "imt_thunks");
  		emit_pointer (acfg, "gsharedvt_arg_trampolines");
  	} else {
  		emit_pointer (acfg, NULL);
  		emit_pointer (acfg, NULL);
  		emit_pointer (acfg, NULL);
  		emit_pointer (acfg, NULL);
  	}
  	if (acfg->thumb_mixed) {
  		emit_pointer (acfg, "thumb_end");
  	} else {
  		emit_pointer (acfg, NULL);
  	}
  	if (acfg->aot_opts.static_link) {
  		emit_pointer (acfg, "globals");
  	} else {
  		emit_pointer (acfg, NULL);
  	}
  	emit_pointer (acfg, "assembly_name");
  	emit_pointer (acfg, "unbox_trampolines");
  	emit_pointer (acfg, "unbox_trampolines_end");
  
  	emit_int32 (acfg, acfg->plt_got_offset_base);
  	emit_int32 (acfg, (int)(acfg->got_offset * sizeof (gpointer)));
  	emit_int32 (acfg, acfg->plt_offset);
  	emit_int32 (acfg, acfg->nmethods);
  	emit_int32 (acfg, acfg->flags);
  	emit_int32 (acfg, acfg->opts);
  	emit_int32 (acfg, acfg->simd_opts);
  	emit_int32 (acfg, gc_name_offset);
  
  	for (i = 0; i < MONO_AOT_TRAMP_NUM; ++i)
  		emit_int32 (acfg, acfg->num_trampolines [i]);
  	for (i = 0; i < MONO_AOT_TRAMP_NUM; ++i)
  		emit_int32 (acfg, acfg->trampoline_got_offset_base [i]);
  	for (i = 0; i < MONO_AOT_TRAMP_NUM; ++i)
  		emit_int32 (acfg, acfg->trampoline_size [i]);
  	emit_int32 (acfg, acfg->aot_opts.nrgctx_fetch_trampolines);
  
  #if defined (TARGET_ARM) && defined (TARGET_MACH)
  	{
  		MonoType t;
  		int align = 0;
  
  		memset (&t, 0, sizeof (MonoType));
  		t.type = MONO_TYPE_R8;
  		mono_type_size (&t, &align);
  		emit_int32 (acfg, align);
  
  		memset (&t, 0, sizeof (MonoType));
  		t.type = MONO_TYPE_I8;
  		mono_type_size (&t, &align);
  
  		emit_int32 (acfg, align);
  	}
  #else
  	emit_int32 (acfg, MONO_ABI_ALIGNOF (double));
  	emit_int32 (acfg, MONO_ABI_ALIGNOF (gint64));
  #endif
  	emit_int32 (acfg, MONO_TRAMPOLINE_NUM);
  	emit_int32 (acfg, acfg->tramp_page_size);
  	for (i = 0; i < MONO_AOT_TRAMP_NUM; ++i)
  		emit_int32 (acfg, acfg->tramp_page_code_offsets [i]);
  
  	if (acfg->aot_opts.static_link) {
  		char *p;
  
  		/* 
  		 * Emit a global symbol which can be passed by an embedding app to
  		 * mono_aot_register_module (). The symbol points to a pointer to the the file info
  		 * structure.
  		 */
  		sprintf (symbol, "%smono_aot_module_%s_info", acfg->user_symbol_prefix, acfg->image->assembly->aname.name);
  
  		/* Get rid of characters which cannot occur in symbols */
  		p = symbol;
  		for (p = symbol; *p; ++p) {
  			if (!(isalnum (*p) || *p == '_'))
  				*p = '_';
  		}
  		acfg->static_linking_symbol = g_strdup (symbol);
  		emit_global_inner (acfg, symbol, FALSE);
  		emit_alignment (acfg, sizeof (gpointer));
  		emit_label (acfg, symbol);
  		emit_pointer_2 (acfg, acfg->user_symbol_prefix, "mono_aot_file_info");
  	}
  }
  
  static void
  emit_blob (MonoAotCompile *acfg)
  {
  	char symbol [128];
  
  	sprintf (symbol, "blob");
  	emit_section_change (acfg, RODATA_SECT, 1);
  	emit_alignment (acfg, 8);
  	emit_label (acfg, symbol);
  
  	emit_bytes (acfg, (guint8*)acfg->blob.data, acfg->blob.index);
  }
  
  static void
  emit_objc_selectors (MonoAotCompile *acfg)
  {
  	int i;
  
  	if (!acfg->objc_selectors || acfg->objc_selectors->len == 0)
  		return;
  
  	/*
  	 * From
  	 * cat > foo.m << EOF
  	 * void *ret ()
  	 * {
  	 * return @selector(print:);
  	 * }
  	 * EOF
  	 */
  
  	img_writer_emit_unset_mode (acfg->w);
  	g_assert (acfg->fp);
  	fprintf (acfg->fp, ".section	__DATA,__objc_selrefs,literal_pointers,no_dead_strip\n");
  	fprintf (acfg->fp, ".align	3\n");
  	for (i = 0; i < acfg->objc_selectors->len; ++i) {
  		fprintf (acfg->fp, "L_OBJC_SELECTOR_REFERENCES_%d:\n", i);
  		fprintf (acfg->fp, ".long	L_OBJC_METH_VAR_NAME_%d\n", i);
  	}
  	fprintf (acfg->fp, ".section	__TEXT,__cstring,cstring_literals\n");
  	for (i = 0; i < acfg->objc_selectors->len; ++i) {
  		fprintf (acfg->fp, "L_OBJC_METH_VAR_NAME_%d:\n", i);
  		fprintf (acfg->fp, ".asciz \"%s\"\n", (char*)g_ptr_array_index (acfg->objc_selectors, i));
  	}
  
  	fprintf (acfg->fp, ".section	__DATA,__objc_imageinfo,regular,no_dead_strip\n");
  	fprintf (acfg->fp, ".align	3\n");
  	fprintf (acfg->fp, "L_OBJC_IMAGE_INFO:\n");
  	fprintf (acfg->fp, ".long	0\n");
  	fprintf (acfg->fp, ".long	16\n");
  }
  
  static void
  emit_dwarf_info (MonoAotCompile *acfg)
  {
  #ifdef EMIT_DWARF_INFO
  	int i;
  	char symbol2 [128];
  
  	/* DIEs for methods */
  	for (i = 0; i < acfg->nmethods; ++i) {
  		MonoCompile *cfg = acfg->cfgs [i];
  
  		if (!cfg)
  			continue;
  
  		// FIXME: LLVM doesn't define .Lme_...
  		if (cfg->compile_llvm)
  			continue;
  
  		sprintf (symbol2, "%sme_%x", acfg->temp_prefix, i);
  
  		mono_dwarf_writer_emit_method (acfg->dwarf, cfg, cfg->method, cfg->asm_symbol, symbol2, cfg->jit_info->code_start, cfg->jit_info->code_size, cfg->args, cfg->locals, cfg->unwind_ops, mono_debug_find_method (cfg->jit_info->d.method, mono_domain_get ()));
  	}
  #endif
  }
  
  static gboolean
  collect_methods (MonoAotCompile *acfg)
  {
  	int mindex, i;
  	MonoImage *image = acfg->image;
  
  	/* Collect methods */
  	for (i = 0; i < image->tables [MONO_TABLE_METHOD].rows; ++i) {
  		MonoMethod *method;
  		guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
  
  		method = mono_get_method (acfg->image, token, NULL);
  
  		if (!method) {
  			aot_printerrf (acfg, "Failed to load method 0x%x from '%s'.\n", token, image->name);
  			aot_printerrf (acfg, "Run with MONO_LOG_LEVEL=debug for more information.\n");
  			return FALSE;
  		}
  			
  		/* Load all methods eagerly to skip the slower lazy loading code */
  		mono_class_setup_methods (method->klass);
  
  		if (acfg->aot_opts.full_aot && method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
  			/* Compile the wrapper instead */
  			/* We do this here instead of add_wrappers () because it is easy to do it here */
  			MonoMethod *wrapper = mono_marshal_get_native_wrapper (method, check_for_pending_exc, TRUE);
  			method = wrapper;
  		}
  
  		/* FIXME: Some mscorlib methods don't have debug info */
  		/*
  		if (acfg->aot_opts.soft_debug && !method->wrapper_type) {
  			if (!((method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
  				  (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
  				  (method->flags & METHOD_ATTRIBUTE_ABSTRACT) ||
  				  (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))) {
  				if (!mono_debug_lookup_method (method)) {
  					fprintf (stderr, "Method %s has no debug info, probably the .mdb file for the assembly is missing.\n", mono_method_full_name (method, TRUE));
  					exit (1);
  				}
  			}
  		}
  		*/
  
  		/* Since we add the normal methods first, their index will be equal to their zero based token index */
  		add_method_with_index (acfg, method, i, FALSE);
  		acfg->method_index ++;
  	}
  
  	/* gsharedvt methods */
  	for (mindex = 0; mindex < image->tables [MONO_TABLE_METHOD].rows; ++mindex) {
  		MonoMethod *method;
  		guint32 token = MONO_TOKEN_METHOD_DEF | (mindex + 1);
  
  		if (!(acfg->opts & MONO_OPT_GSHAREDVT))
  			continue;
  
  		method = mono_get_method (acfg->image, token, NULL);
  		if (!method)
  			continue;
  		/*
  		if (strcmp (method->name, "gshared2"))
  			continue;
  		*/
  		/*
  		if (!strstr (method->klass->image->name, "mini"))
  			continue;
  		*/
  		if (method->is_generic || method->klass->generic_container) {
  			MonoMethod *gshared;
  
  			gshared = mini_get_shared_method_full (method, TRUE, TRUE);
  			add_extra_method (acfg, gshared);
  		}
  	}
  
  	add_generic_instances (acfg);
  
  	if (acfg->aot_opts.full_aot)
  		add_wrappers (acfg);
  	return TRUE;
  }
  
  static void
  compile_methods (MonoAotCompile *acfg)
  {
  	int i, methods_len;
  
  	if (acfg->aot_opts.nthreads > 0) {
  		GPtrArray *frag;
  		int len, j;
  		GPtrArray *threads;
  		HANDLE handle;
  		gpointer *user_data;
  		MonoMethod **methods;
  
  		methods_len = acfg->methods->len;
  
  		len = acfg->methods->len / acfg->aot_opts.nthreads;
  		g_assert (len > 0);
  		/* 
  		 * Partition the list of methods into fragments, and hand it to threads to
  		 * process.
  		 */
  		threads = g_ptr_array_new ();
  		/* Make a copy since acfg->methods is modified by compile_method () */
  		methods = g_new0 (MonoMethod*, methods_len);
  		//memcpy (methods, g_ptr_array_index (acfg->methods, 0), sizeof (MonoMethod*) * methods_len);
  		for (i = 0; i < methods_len; ++i)
  			methods [i] = g_ptr_array_index (acfg->methods, i);
  		i = 0;
  		while (i < methods_len) {
  			frag = g_ptr_array_new ();
  			for (j = 0; j < len; ++j) {
  				if (i < methods_len) {
  					g_ptr_array_add (frag, methods [i]);
  					i ++;
  				}
  			}
  
  			user_data = g_new0 (gpointer, 3);
  			user_data [0] = mono_domain_get ();
  			user_data [1] = acfg;
  			user_data [2] = frag;
  			
  			handle = mono_threads_create_thread ((gpointer)compile_thread_main, user_data, 0, 0, NULL);
  			g_ptr_array_add (threads, handle);
  		}
  		g_free (methods);
  
  		for (i = 0; i < threads->len; ++i) {
  			WaitForSingleObjectEx (g_ptr_array_index (threads, i), INFINITE, FALSE);
  		}
  	} else {
  		methods_len = 0;
  	}
  
  	/* Compile methods added by compile_method () or all methods if nthreads == 0 */
  	for (i = methods_len; i < acfg->methods->len; ++i) {
  		/* This can new methods to acfg->methods */
  		compile_method (acfg, g_ptr_array_index (acfg->methods, i));
  	}
  }
  
  static int
  compile_asm (MonoAotCompile *acfg)
  {
  	char *command, *objfile;
  	char *outfile_name, *tmp_outfile_name;
  	const char *tool_prefix = acfg->aot_opts.tool_prefix ? acfg->aot_opts.tool_prefix : "";
  
  #if defined(TARGET_AMD64) && !defined(TARGET_MACH)
  #define AS_OPTIONS "--64"
  #elif defined(TARGET_POWERPC64)
  #define AS_OPTIONS "-a64 -mppc64"
  #define LD_OPTIONS "-m elf64ppc"
  #elif defined(sparc) && SIZEOF_VOID_P == 8
  #define AS_OPTIONS "-xarch=v9"
  #elif defined(TARGET_X86) && defined(TARGET_MACH) && !defined(__native_client_codegen__)
  #define AS_OPTIONS "-arch i386"
  #else
  #define AS_OPTIONS ""
  #endif
  
  #ifdef __native_client_codegen__
  #if defined(TARGET_AMD64)
  #define AS_NAME "nacl64-as"
  #else
  #define AS_NAME "nacl-as"
  #endif
  #elif defined(TARGET_OSX)
  #define AS_NAME "clang -c -x assembler"
  #else
  #define AS_NAME "as"
  #endif
  
  #ifndef LD_OPTIONS
  #define LD_OPTIONS ""
  #endif
  
  #if defined(sparc)
  #define LD_NAME "ld -shared -G"
  #elif defined(__ppc__) && defined(TARGET_MACH)
  #define LD_NAME "gcc -dynamiclib"
  #elif defined(TARGET_AMD64) && defined(TARGET_MACH)
  #define LD_NAME "clang --shared"
  #elif defined(HOST_WIN32)
  #define LD_NAME "gcc -shared --dll"
  #elif defined(TARGET_X86) && defined(TARGET_MACH) && !defined(__native_client_codegen__)
  #define LD_NAME "clang -m32 -dynamiclib"
  #endif
  
  	if (acfg->aot_opts.asm_only) {
  		aot_printf (acfg, "Output file: '%s'.\n", acfg->tmpfname);
  		if (acfg->aot_opts.static_link)
  			aot_printf (acfg, "Linking symbol: '%s'.\n", acfg->static_linking_symbol);
  		return 0;
  	}
  
  	if (acfg->aot_opts.static_link) {
  		if (acfg->aot_opts.outfile)
  			objfile = g_strdup_printf ("%s", acfg->aot_opts.outfile);
  		else
  			objfile = g_strdup_printf ("%s.o", acfg->image->name);
  	} else {
  		objfile = g_strdup_printf ("%s.o", acfg->tmpfname);
  	}
  	command = g_strdup_printf ("%s%s %s %s -o %s %s", tool_prefix, AS_NAME, AS_OPTIONS, acfg->as_args ? acfg->as_args->str : "", objfile, acfg->tmpfname);
  	aot_printf (acfg, "Executing the native assembler: %s\n", command);
  	if (system (command) != 0) {
  		g_free (command);
  		g_free (objfile);
  		return 1;
  	}
  
  	g_free (command);
  
  	if (acfg->aot_opts.static_link) {
  		aot_printf (acfg, "Output file: '%s'.\n", objfile);
  		aot_printf (acfg, "Linking symbol: '%s'.\n", acfg->static_linking_symbol);
  		g_free (objfile);
  		return 0;
  	}
  
  	if (acfg->aot_opts.outfile)
  		outfile_name = g_strdup_printf ("%s", acfg->aot_opts.outfile);
  	else
  		outfile_name = g_strdup_printf ("%s%s", acfg->image->name, SHARED_EXT);
  
  	tmp_outfile_name = g_strdup_printf ("%s.tmp", outfile_name);
  
  #ifdef LD_NAME
  	command = g_strdup_printf ("%s -o %s %s.o", LD_NAME, tmp_outfile_name, acfg->tmpfname);
  #else
  	command = g_strdup_printf ("%sld %s -shared -o %s %s.o", tool_prefix, LD_OPTIONS, tmp_outfile_name, acfg->tmpfname);
  #endif
  	aot_printf (acfg, "Executing the native linker: %s\n", command);
  	if (system (command) != 0) {
  		g_free (tmp_outfile_name);
  		g_free (outfile_name);
  		g_free (command);
  		g_free (objfile);
  		return 1;
  	}
  
  	g_free (command);
  
  	/*com = g_strdup_printf ("strip --strip-unneeded %s%s", acfg->image->name, SHARED_EXT);
  	printf ("Stripping the binary: %s\n", com);
  	system (com);
  	g_free (com);*/
  
  #if defined(TARGET_ARM) && !defined(TARGET_MACH)
  	/* 
  	 * gas generates 'mapping symbols' each time code and data is mixed, which 
  	 * happens a lot in emit_and_reloc_code (), so we need to get rid of them.
  	 */
  	command = g_strdup_printf ("%sstrip --strip-symbol=\\$a --strip-symbol=\\$d %s", tool_prefix, tmp_outfile_name);
  	aot_printf (acfg, "Stripping the binary: %s\n", command);
  	if (system (command) != 0) {
  		g_free (tmp_outfile_name);
  		g_free (outfile_name);
  		g_free (command);
  		g_free (objfile);
  		return 1;
  	}
  #endif
  
  	rename (tmp_outfile_name, outfile_name);
  
  #if defined(TARGET_MACH)
  	command = g_strdup_printf ("dsymutil %s", outfile_name);
  	aot_printf (acfg, "Executing dsymutil: %s\n", command);
  	if (system (command) != 0) {
  		return 1;
  	}
  #endif
  
  	if (!acfg->aot_opts.save_temps)
  		unlink (objfile);
  
  	g_free (tmp_outfile_name);
  	g_free (outfile_name);
  	g_free (objfile);
  
  	if (acfg->aot_opts.save_temps)
  		aot_printf (acfg, "Retained input file.\n");
  	else
  		unlink (acfg->tmpfname);
  
  	return 0;
  }
  
  static MonoAotCompile*
  acfg_create (MonoAssembly *ass, guint32 opts)
  {
  	MonoImage *image = ass->image;
  	MonoAotCompile *acfg;
  	int i;
  
  	acfg = g_new0 (MonoAotCompile, 1);
  	acfg->methods = g_ptr_array_new ();
  	acfg->method_indexes = g_hash_table_new (NULL, NULL);
  	acfg->method_depth = g_hash_table_new (NULL, NULL);
  	acfg->plt_offset_to_entry = g_hash_table_new (NULL, NULL);
  	acfg->patch_to_plt_entry = g_new0 (GHashTable*, MONO_PATCH_INFO_NUM);
  	acfg->patch_to_got_offset = g_hash_table_new (mono_patch_info_hash, mono_patch_info_equal);
  	acfg->patch_to_got_offset_by_type = g_new0 (GHashTable*, MONO_PATCH_INFO_NUM);
  	for (i = 0; i < MONO_PATCH_INFO_NUM; ++i)
  		acfg->patch_to_got_offset_by_type [i] = g_hash_table_new (mono_patch_info_hash, mono_patch_info_equal);
  	acfg->got_patches = g_ptr_array_new ();
  	acfg->method_to_cfg = g_hash_table_new (NULL, NULL);
  	acfg->token_info_hash = g_hash_table_new_full (NULL, NULL, NULL, NULL);
  	acfg->method_to_pinvoke_import = g_hash_table_new_full (NULL, NULL, NULL, g_free);
  	acfg->image_hash = g_hash_table_new (NULL, NULL);
  	acfg->image_table = g_ptr_array_new ();
  	acfg->globals = g_ptr_array_new ();
  	acfg->image = image;
  	acfg->opts = opts;
  	/* TODO: Write out set of SIMD instructions used, rather than just those available */
  	acfg->simd_opts = mono_arch_cpu_enumerate_simd_versions ();
  	acfg->mempool = mono_mempool_new ();
  	acfg->extra_methods = g_ptr_array_new ();
  	acfg->unwind_info_offsets = g_hash_table_new (NULL, NULL);
  	acfg->unwind_ops = g_ptr_array_new ();
  	acfg->method_label_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
  	acfg->method_order = g_ptr_array_new ();
  	acfg->export_names = g_hash_table_new (NULL, NULL);
  	acfg->klass_blob_hash = g_hash_table_new (NULL, NULL);
  	acfg->method_blob_hash = g_hash_table_new (NULL, NULL);
  	acfg->plt_entry_debug_sym_cache = g_hash_table_new (g_str_hash, g_str_equal);
  	mono_mutex_init_recursive (&acfg->mutex);
  
  	return acfg;
  }
  
  static void
  acfg_free (MonoAotCompile *acfg)
  {
  	int i;
  
  	img_writer_destroy (acfg->w);
  	for (i = 0; i < acfg->nmethods; ++i)
  		if (acfg->cfgs [i])
  			g_free (acfg->cfgs [i]);
  	g_free (acfg->cfgs);
  	g_free (acfg->static_linking_symbol);
  	g_free (acfg->got_symbol);
  	g_free (acfg->plt_symbol);
  	g_ptr_array_free (acfg->methods, TRUE);
  	g_ptr_array_free (acfg->got_patches, TRUE);
  	g_ptr_array_free (acfg->image_table, TRUE);
  	g_ptr_array_free (acfg->globals, TRUE);
  	g_ptr_array_free (acfg->unwind_ops, TRUE);
  	g_hash_table_destroy (acfg->method_indexes);
  	g_hash_table_destroy (acfg->method_depth);
  	g_hash_table_destroy (acfg->plt_offset_to_entry);
  	for (i = 0; i < MONO_PATCH_INFO_NUM; ++i) {
  		if (acfg->patch_to_plt_entry [i])
  			g_hash_table_destroy (acfg->patch_to_plt_entry [i]);
  	}
  	g_free (acfg->patch_to_plt_entry);
  	g_hash_table_destroy (acfg->patch_to_got_offset);
  	g_hash_table_destroy (acfg->method_to_cfg);
  	g_hash_table_destroy (acfg->token_info_hash);
  	g_hash_table_destroy (acfg->method_to_pinvoke_import);
  	g_hash_table_destroy (acfg->image_hash);
  	g_hash_table_destroy (acfg->unwind_info_offsets);
  	g_hash_table_destroy (acfg->method_label_hash);
  	g_hash_table_destroy (acfg->export_names);
  	g_hash_table_destroy (acfg->plt_entry_debug_sym_cache);
  	g_hash_table_destroy (acfg->klass_blob_hash);
  	g_hash_table_destroy (acfg->method_blob_hash);
  	for (i = 0; i < MONO_PATCH_INFO_NUM; ++i)
  		g_hash_table_destroy (acfg->patch_to_got_offset_by_type [i]);
  	g_free (acfg->patch_to_got_offset_by_type);
  	mono_mempool_destroy (acfg->mempool);
  	g_free (acfg);
  }
  
  int
  mono_compile_assembly (MonoAssembly *ass, guint32 opts, const char *aot_options)
  {
  	MonoImage *image = ass->image;
  	int i, res, all_sizes;
  	MonoAotCompile *acfg;
  	char *outfile_name, *tmp_outfile_name, *p;
  	char llvm_stats_msg [256];
  	TV_DECLARE (atv);
  	TV_DECLARE (btv);
  
  	acfg = acfg_create (ass, opts);
  
  	memset (&acfg->aot_opts, 0, sizeof (acfg->aot_opts));
  	acfg->aot_opts.write_symbols = TRUE;
  	acfg->aot_opts.ntrampolines = 1024;
  	acfg->aot_opts.nrgctx_trampolines = 1024;
  	acfg->aot_opts.nimt_trampolines = 128;
  	acfg->aot_opts.nrgctx_fetch_trampolines = 128;
  	acfg->aot_opts.ngsharedvt_arg_trampolines = 128;
  	acfg->aot_opts.llvm_path = g_strdup ("");
  #ifdef MONOTOUCH
  	acfg->aot_opts.use_trampolines_page = TRUE;
  #endif
  
  	mono_aot_parse_options (aot_options, &acfg->aot_opts);
  
  	if (acfg->aot_opts.logfile) {
  		acfg->logfile = fopen (acfg->aot_opts.logfile, "a+");
  	}
  
  	if (acfg->aot_opts.static_link)
  		acfg->aot_opts.autoreg = TRUE;
  
  	//acfg->aot_opts.print_skipped_methods = TRUE;
  
  #if !defined(MONO_ARCH_GSHAREDVT_SUPPORTED) || !defined(ENABLE_GSHAREDVT)
  	if (opts & MONO_OPT_GSHAREDVT) {
  		aot_printerrf (acfg, "-O=gsharedvt not supported on this platform.\n");
  		return 1;
  	}
  #endif
  
  	aot_printf (acfg, "Mono Ahead of Time compiler - compiling assembly %s\n", image->name);
  
  #ifndef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
  	if (acfg->aot_opts.full_aot) {
  		aot_printerrf (acfg, "--aot=full is not supported on this platform.\n");
  		return 1;
  	}
  #endif
  
  	if (acfg->aot_opts.direct_pinvoke && !acfg->aot_opts.static_link) {
  		aot_printerrf (acfg, "The 'direct-pinvoke' AOT option also requires the 'static' AOT option.\n");
  		return 1;
  	}
  
  	if (acfg->aot_opts.static_link)
  		acfg->aot_opts.asm_writer = TRUE;
  
  	if (acfg->aot_opts.soft_debug) {
  		MonoDebugOptions *opt = mini_get_debug_options ();
  
  		opt->mdb_optimizations = TRUE;
  		opt->gen_seq_points = TRUE;
  
  		if (!mono_debug_enabled ()) {
  			aot_printerrf (acfg, "The soft-debug AOT option requires the --debug option.\n");
  			return 1;
  		}
  		acfg->flags |= MONO_AOT_FILE_FLAG_DEBUG;
  	}
  
  	if (mono_use_llvm || acfg->aot_opts.llvm) {
  		acfg->llvm = TRUE;
  		acfg->aot_opts.asm_writer = TRUE;
  		acfg->flags |= MONO_AOT_FILE_FLAG_WITH_LLVM;
  
  		if (acfg->aot_opts.soft_debug) {
  			aot_printerrf (acfg, "The 'soft-debug' option is not supported when compiling with LLVM.\n");
  			return 1;
  		}
  
  		mini_llvm_init ();
  	}
  
  	if (acfg->aot_opts.full_aot)
  		acfg->flags |= MONO_AOT_FILE_FLAG_FULL_AOT;
  
  	if (acfg->aot_opts.instances_logfile_path) {
  		acfg->instances_logfile = fopen (acfg->aot_opts.instances_logfile_path, "w");
  		if (!acfg->instances_logfile) {
  			aot_printerrf (acfg, "Unable to create logfile: '%s'.\n", acfg->aot_opts.instances_logfile_path);
  			return 1;
  		}
  	}
  
  	load_profile_files (acfg);
  
  	acfg->num_trampolines [MONO_AOT_TRAMP_SPECIFIC] = acfg->aot_opts.full_aot ? acfg->aot_opts.ntrampolines : 0;
  #ifdef MONO_ARCH_GSHARED_SUPPORTED
  	acfg->num_trampolines [MONO_AOT_TRAMP_STATIC_RGCTX] = acfg->aot_opts.full_aot ? acfg->aot_opts.nrgctx_trampolines : 0;
  #endif
  	acfg->num_trampolines [MONO_AOT_TRAMP_IMT_THUNK] = acfg->aot_opts.full_aot ? acfg->aot_opts.nimt_trampolines : 0;
  #ifdef MONO_ARCH_GSHAREDVT_SUPPORTED
  	if (acfg->opts & MONO_OPT_GSHAREDVT)
  		acfg->num_trampolines [MONO_AOT_TRAMP_GSHAREDVT_ARG] = acfg->aot_opts.full_aot ? acfg->aot_opts.ngsharedvt_arg_trampolines : 0;
  #endif
  
  	acfg->temp_prefix = img_writer_get_temp_label_prefix (NULL);
  
  	arch_init (acfg);
  
  	acfg->got_symbol_base = g_strdup_printf ("mono_aot_%s_got", acfg->image->assembly->aname.name);
  	acfg->plt_symbol = g_strdup_printf ("%smono_aot_%s_plt", acfg->llvm_label_prefix, acfg->image->assembly->aname.name);
  	acfg->assembly_name_sym = g_strdup (acfg->image->assembly->aname.name);
  
  	/* Get rid of characters which cannot occur in symbols */
  	for (p = acfg->got_symbol_base; *p; ++p) {
  		if (!(isalnum (*p) || *p == '_'))
  			*p = '_';
  	}
  	for (p = acfg->plt_symbol; *p; ++p) {
  		if (!(isalnum (*p) || *p == '_'))
  			*p = '_';
  	}
  	for (p = acfg->assembly_name_sym; *p; ++p) {
  		if (!(isalnum (*p) || *p == '_'))
  			*p = '_';
  	}
  
  	acfg->method_index = 1;
  
  	// FIXME:
  	/*
  	if (acfg->aot_opts.full_aot)
  		mono_set_partial_sharing_supported (TRUE);
  	*/
  
  	res = collect_methods (acfg);
  	if (!res)
  		return 1;
  
  	acfg->cfgs_size = acfg->methods->len + 32;
  	acfg->cfgs = g_new0 (MonoCompile*, acfg->cfgs_size);
  
  	/* PLT offset 0 is reserved for the PLT trampoline */
  	acfg->plt_offset = 1;
  
  #ifdef ENABLE_LLVM
  	if (acfg->llvm) {
  		llvm_acfg = acfg;
  		mono_llvm_create_aot_module (acfg->got_symbol_base);
  	}
  #endif
  
  	/* GOT offset 0 is reserved for the address of the current assembly */
  	{
  		MonoJumpInfo *ji;
  
  		ji = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoAotCompile));
  		ji->type = MONO_PATCH_INFO_IMAGE;
  		ji->data.image = acfg->image;
  
  		get_got_offset (acfg, ji);
  
  		/* Slot 1 is reserved for the mscorlib got addr */
  		ji = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoAotCompile));
  		ji->type = MONO_PATCH_INFO_MSCORLIB_GOT_ADDR;
  		get_got_offset (acfg, ji);
  
  		/* This is very common */
  		ji = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoAotCompile));
  		ji->type = MONO_PATCH_INFO_GC_CARD_TABLE_ADDR;
  		get_got_offset (acfg, ji);
  
  		ji = mono_mempool_alloc0 (acfg->mempool, sizeof (MonoAotCompile));
  		ji->type = MONO_PATCH_INFO_JIT_TLS_ID;
  		get_got_offset (acfg, ji);
  	}
  
  	TV_GETTIME (atv);
  
  	compile_methods (acfg);
  
  	TV_GETTIME (btv);
  
  	acfg->stats.jit_time = TV_ELAPSED (atv, btv);
  
  	TV_GETTIME (atv);
  
  #ifdef ENABLE_LLVM
  	if (acfg->llvm) {
  		gboolean res;
  
  		if (acfg->aot_opts.asm_only) {
  			if (acfg->aot_opts.outfile) {
  				acfg->tmpfname = g_strdup_printf ("%s", acfg->aot_opts.outfile);
  				acfg->tmpbasename = g_strdup (acfg->tmpfname);
  			} else {
  				acfg->tmpbasename = g_strdup_printf ("%s", acfg->image->name);
  				acfg->tmpfname = g_strdup_printf ("%s.s", acfg->tmpbasename);
  			}
  		} else {
  			acfg->tmpbasename = g_strdup_printf ("%s", "temp");
  			acfg->tmpfname = g_strdup_printf ("%s.s", acfg->tmpbasename);
  		}
  
  		res = emit_llvm_file (acfg);
  		if (!res)
  			return 1;
  	}
  #endif
  
  	if (!acfg->aot_opts.asm_only && !acfg->aot_opts.asm_writer && bin_writer_supported ()) {
  		if (acfg->aot_opts.outfile)
  			outfile_name = g_strdup_printf ("%s", acfg->aot_opts.outfile);
  		else
  			outfile_name = g_strdup_printf ("%s%s", acfg->image->name, SHARED_EXT);
  
  		/* 
  		 * Can't use g_file_open_tmp () as it will be deleted at exit, and
  		 * it might be in another file system so the rename () won't work.
  		 */
  		tmp_outfile_name = g_strdup_printf ("%s.tmp", outfile_name);
  
  		acfg->fp = fopen (tmp_outfile_name, "w");
  		if (!acfg->fp) {
  			aot_printf (acfg, "Unable to create temporary file '%s': %s\n", tmp_outfile_name, strerror (errno));
  			return 1;
  		}
  
  		acfg->w = img_writer_create (acfg->fp, TRUE);
  		acfg->use_bin_writer = TRUE;
  	} else {
  		if (acfg->llvm) {
  			/* Append to the .s file created by llvm */
  			/* FIXME: Use multiple files instead */
  			acfg->fp = fopen (acfg->tmpfname, "a+");
  		} else {
  			if (acfg->aot_opts.asm_only) {
  				if (acfg->aot_opts.outfile)
  					acfg->tmpfname = g_strdup_printf ("%s", acfg->aot_opts.outfile);
  				else
  					acfg->tmpfname = g_strdup_printf ("%s.s", acfg->image->name);
  				acfg->fp = fopen (acfg->tmpfname, "w+");
  			} else {
  				int i = g_file_open_tmp ("mono_aot_XXXXXX", &acfg->tmpfname, NULL);
  				acfg->fp = fdopen (i, "w+");
  			}
  		}
  		if (acfg->fp == 0) {
  			aot_printerrf (acfg, "Unable to open file '%s': %s\n", acfg->tmpfname, strerror (errno));
  			return 1;
  		}
  		acfg->w = img_writer_create (acfg->fp, FALSE);
  		
  		tmp_outfile_name = NULL;
  		outfile_name = NULL;
  	}
  
  	acfg->got_symbol = g_strdup_printf ("%s%s", acfg->llvm_label_prefix, acfg->got_symbol_base);
  
  	/* Compute symbols for methods */
  	for (i = 0; i < acfg->nmethods; ++i) {
  		if (acfg->cfgs [i]) {
  			MonoCompile *cfg = acfg->cfgs [i];
  			int method_index = get_method_index (acfg, cfg->orig_method);
  
  			if (COMPILE_LLVM (cfg))
  				cfg->asm_symbol = g_strdup_printf ("%s%s", acfg->llvm_label_prefix, cfg->llvm_method_name);
  			else if (acfg->global_symbols)
  				cfg->asm_symbol = get_debug_sym (cfg->method, "", acfg->method_label_hash);
  			else
  				cfg->asm_symbol = g_strdup_printf ("%s%sm_%x", acfg->temp_prefix, acfg->llvm_label_prefix, method_index);
  		}
  	}
  
  	if (acfg->aot_opts.dwarf_debug && acfg->aot_opts.asm_only && acfg->aot_opts.gnu_asm) {
  		/*
  		 * CLANG supports GAS .file/.loc directives, so emit line number information this way
  		 * FIXME: CLANG only emits line number info for .loc directives followed by assembly, not
  		 * .byte directives.
  		 */
  		//acfg->gas_line_numbers = TRUE;
  	}
  
  	if (!acfg->aot_opts.nodebug || acfg->aot_opts.dwarf_debug) {
  		if (acfg->aot_opts.dwarf_debug && !mono_debug_enabled ()) {
  			aot_printerrf (acfg, "The dwarf AOT option requires the --debug option.\n");
  			return 1;
  		}
  		acfg->dwarf = mono_dwarf_writer_create (acfg->w, NULL, 0, FALSE, !acfg->gas_line_numbers);
  	}
  
  	img_writer_emit_start (acfg->w);
  
  	if (acfg->dwarf)
  		mono_dwarf_writer_emit_base_info (acfg->dwarf, g_path_get_basename (acfg->image->name), mono_unwind_get_cie_program ());
  
  	if (acfg->thumb_mixed) {
  		char symbol [256];
  		/*
  		 * This global symbol marks the end of THUMB code, and the beginning of ARM
  		 * code generated by our JIT.
  		 */
  		sprintf (symbol, "thumb_end");
  		emit_section_change (acfg, ".text", 0);
  		emit_alignment (acfg, 8);
  		emit_label (acfg, symbol);
  		emit_zero_bytes (acfg, 16);
  
  		fprintf (acfg->fp, ".arm\n");
  	}
  
  	emit_code (acfg);
  
  	emit_info (acfg);
  
  	emit_extra_methods (acfg);
  
  	emit_trampolines (acfg);
  
  	emit_class_name_table (acfg);
  
  	emit_got_info (acfg);
  
  	emit_exception_info (acfg);
  
  	emit_unwind_info (acfg);
  
  	emit_class_info (acfg);
  
  	emit_plt (acfg);
  
  	emit_image_table (acfg);
  
  	emit_got (acfg);
  
  	emit_file_info (acfg);
  
  	emit_blob (acfg);
  
  	emit_objc_selectors (acfg);
  
  	emit_globals (acfg);
  
  	emit_autoreg (acfg);
  
  	if (acfg->dwarf) {
  		emit_dwarf_info (acfg);
  		mono_dwarf_writer_close (acfg->dwarf);
  	}
  
  	emit_mem_end (acfg);
  
  	if (acfg->need_pt_gnu_stack) {
  		/* This is required so the .so doesn't have an executable stack */
  		/* The bin writer already emits this */
  		if (!acfg->use_bin_writer)
  			fprintf (acfg->fp, "\n.section	.note.GNU-stack,\"\",@progbits\n");
  	}
  
  	TV_GETTIME (btv);
  
  	acfg->stats.gen_time = TV_ELAPSED (atv, btv);
  
  	if (acfg->llvm)
  		g_assert (acfg->got_offset <= acfg->final_got_size);
  
  	if (acfg->llvm)
  		sprintf (llvm_stats_msg, ", LLVM: %d (%d%%)", acfg->stats.llvm_count, acfg->stats.mcount ? (acfg->stats.llvm_count * 100) / acfg->stats.mcount : 100);
  	else
  		strcpy (llvm_stats_msg, "");
  
  	all_sizes = acfg->stats.code_size + acfg->stats.info_size + acfg->stats.ex_info_size + acfg->stats.unwind_info_size + acfg->stats.class_info_size + acfg->stats.got_info_size + acfg->stats.offsets_size + acfg->stats.plt_size;
  
  	aot_printf (acfg, "Code: %d(%d%%) Info: %d(%d%%) Ex Info: %d(%d%%) Unwind Info: %d(%d%%) Class Info: %d(%d%%) PLT: %d(%d%%) GOT Info: %d(%d%%) Offsets: %d(%d%%) GOT: %d\n",
  			acfg->stats.code_size, acfg->stats.code_size * 100 / all_sizes,
  			acfg->stats.info_size, acfg->stats.info_size * 100 / all_sizes,
  			acfg->stats.ex_info_size, acfg->stats.ex_info_size * 100 / all_sizes,
  			acfg->stats.unwind_info_size, acfg->stats.unwind_info_size * 100 / all_sizes,
  			acfg->stats.class_info_size, acfg->stats.class_info_size * 100 / all_sizes,
  			acfg->stats.plt_size ? acfg->stats.plt_size : acfg->plt_offset, acfg->stats.plt_size ? acfg->stats.plt_size * 100 / all_sizes : 0,
  			acfg->stats.got_info_size, acfg->stats.got_info_size * 100 / all_sizes,
  			acfg->stats.offsets_size, acfg->stats.offsets_size * 100 / all_sizes,
  			(int)(acfg->got_offset * sizeof (gpointer)));
  	aot_printf (acfg, "Compiled: %d/%d (%d%%)%s, No GOT slots: %d (%d%%), Direct calls: %d (%d%%)\n", 
  			acfg->stats.ccount, acfg->stats.mcount, acfg->stats.mcount ? (acfg->stats.ccount * 100) / acfg->stats.mcount : 100,
  			llvm_stats_msg,
  			acfg->stats.methods_without_got_slots, acfg->stats.mcount ? (acfg->stats.methods_without_got_slots * 100) / acfg->stats.mcount : 100,
  			acfg->stats.direct_calls, acfg->stats.all_calls ? (acfg->stats.direct_calls * 100) / acfg->stats.all_calls : 100);
  	if (acfg->stats.genericcount)
  		aot_printf (acfg, "%d methods are generic (%d%%)\n", acfg->stats.genericcount, acfg->stats.mcount ? (acfg->stats.genericcount * 100) / acfg->stats.mcount : 100);
  	if (acfg->stats.abscount)
  		aot_printf (acfg, "%d methods contain absolute addresses (%d%%)\n", acfg->stats.abscount, acfg->stats.mcount ? (acfg->stats.abscount * 100) / acfg->stats.mcount : 100);
  	if (acfg->stats.lmfcount)
  		aot_printf (acfg, "%d methods contain lmf pointers (%d%%)\n", acfg->stats.lmfcount, acfg->stats.mcount ? (acfg->stats.lmfcount * 100) / acfg->stats.mcount : 100);
  	if (acfg->stats.ocount)
  		aot_printf (acfg, "%d methods have other problems (%d%%)\n", acfg->stats.ocount, acfg->stats.mcount ? (acfg->stats.ocount * 100) / acfg->stats.mcount : 100);
  
  	TV_GETTIME (atv);
  	res = img_writer_emit_writeout (acfg->w);
  	if (res != 0) {
  		acfg_free (acfg);
  		return res;
  	}
  	if (acfg->use_bin_writer) {
  		int err = rename (tmp_outfile_name, outfile_name);
  
  		if (err) {
  			aot_printf (acfg, "Unable to rename '%s' to '%s': %s\n", tmp_outfile_name, outfile_name, strerror (errno));
  			return 1;
  		}
  	} else {
  		res = compile_asm (acfg);
  		if (res != 0) {
  			acfg_free (acfg);
  			return res;
  		}
  	}
  	TV_GETTIME (btv);
  	acfg->stats.link_time = TV_ELAPSED (atv, btv);
  
  	if (acfg->aot_opts.stats) {
  		int i;
  
  		aot_printf (acfg, "GOT slot distribution:\n");
  		for (i = 0; i < MONO_PATCH_INFO_NONE; ++i)
  			if (acfg->stats.got_slot_types [i])
  				aot_printf (acfg, "\t%s: %d (%d)\n", get_patch_name (i), acfg->stats.got_slot_types [i], acfg->stats.got_slot_info_sizes [i]);
  	}
  
  	aot_printf (acfg, "JIT time: %d ms, Generation time: %d ms, Assembly+Link time: %d ms.\n", acfg->stats.jit_time / 1000, acfg->stats.gen_time / 1000, acfg->stats.link_time / 1000);
  
  	acfg_free (acfg);
  	
  	return 0;
  }
  
  #else
  
  /* AOT disabled */
  
  void*
  mono_aot_readonly_field_override (MonoClassField *field)
  {
  	return NULL;
  }
  
  int
  mono_compile_assembly (MonoAssembly *ass, guint32 opts, const char *aot_options)
  {
  	return 0;
  }
  
  #endif
  