text: /*
   * assembly.c: Routines for loading assemblies.
   * 
   * Author:
   *   Miguel de Icaza (miguel@ximian.com)
   *
   * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
   * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
   * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
   */
  #include <config.h>
  #include <stdio.h>
  #include <glib.h>
  #include <errno.h>
  #include <string.h>
  #include <stdlib.h>
  #include "assembly.h"
  #include "image.h"
  #include "object-internals.h"
  #include <mono/metadata/loader.h>
  #include <mono/metadata/tabledefs.h>
  #include <mono/metadata/metadata-internals.h>
  #include <mono/metadata/profiler-private.h>
  #include <mono/metadata/class-internals.h>
  #include <mono/metadata/domain-internals.h>
  #include <mono/metadata/mono-endian.h>
  #include <mono/metadata/mono-debug.h>
  #include <mono/io-layer/io-layer.h>
  #include <mono/utils/mono-uri.h>
  #include <mono/metadata/mono-config.h>
  #include <mono/metadata/mono-config-dirs.h>
  #include <mono/utils/mono-digest.h>
  #include <mono/utils/mono-logger-internal.h>
  #include <mono/utils/mono-path.h>
  #include <mono/metadata/reflection.h>
  #include <mono/metadata/coree.h>
  #include <mono/metadata/cil-coff.h>
  #include <mono/utils/mono-io-portability.h>
  #include <mono/utils/atomic.h>
  #include <mono/utils/mono-mutex.h>
  
  #ifndef HOST_WIN32
  #include <sys/types.h>
  #include <unistd.h>
  #include <sys/stat.h>
  #endif
  
  #ifdef PLATFORM_MACOSX
  #include <mach-o/dyld.h>
  #endif
  
  /* AssemblyVersionMap: an assembly name and the assembly version set on which it is based */
  typedef struct  {
  	const char* assembly_name;
  	guint8 version_set_index;
  } AssemblyVersionMap;
  
  /* the default search path is empty, the first slot is replaced with the computed value */
  static const char*
  default_path [] = {
  	NULL,
  	NULL,
  	NULL
  };
  
  /* Contains the list of directories to be searched for assemblies (MONO_PATH) */
  static char **assemblies_path = NULL;
  
  /* Contains the list of directories that point to auxiliary GACs */
  static char **extra_gac_paths = NULL;
  
  #ifndef DISABLE_ASSEMBLY_REMAPPING
  /* The list of system assemblies what will be remapped to the running
   * runtime version. WARNING: this list must be sorted.
   * The integer number is an index in the MonoRuntimeInfo structure, whose
   * values can be found in domain.c - supported_runtimes. Look there
   * to understand what remapping will be made.
   */
  static const AssemblyVersionMap framework_assemblies [] = {
  	{"Accessibility", 0},
  	{"Commons.Xml.Relaxng", 0},
  	{"I18N", 0},
  	{"I18N.CJK", 0},
  	{"I18N.MidEast", 0},
  	{"I18N.Other", 0},
  	{"I18N.Rare", 0},
  	{"I18N.West", 0},
  	{"Microsoft.VisualBasic", 1},
  	{"Microsoft.VisualC", 1},
  	{"Mono.Cairo", 0},
  	{"Mono.CompilerServices.SymbolWriter", 0},
  	{"Mono.Data", 0},
  	{"Mono.Data.SybaseClient", 0},
  	{"Mono.Data.Tds", 0},
  	{"Mono.Data.TdsClient", 0},
  	{"Mono.GetOptions", 0},
  	{"Mono.Http", 0},
  	{"Mono.Posix", 0},
  	{"Mono.Security", 0},
  	{"Mono.Security.Win32", 0},
  	{"Mono.Xml.Ext", 0},
  	{"Novell.Directory.Ldap", 0},
  	{"Npgsql", 0},
  	{"PEAPI", 0},
  	{"System", 0},
  	{"System.ComponentModel.DataAnnotations", 2},
  	{"System.Configuration", 0},
  	{"System.Configuration.Install", 0},
  	{"System.Core", 2},
  	{"System.Data", 0},
  	{"System.Data.Linq", 2},
  	{"System.Data.OracleClient", 0},
  	{"System.Data.Services", 2},
  	{"System.Data.Services.Client", 2},
  	{"System.Data.SqlXml", 0},
  	{"System.Design", 0},
  	{"System.DirectoryServices", 0},
  	{"System.Drawing", 0},
  	{"System.Drawing.Design", 0},
  	{"System.EnterpriseServices", 0},
  	{"System.Management", 0},
  	{"System.Messaging", 0},
  	{"System.Net", 2},
  	{"System.Runtime.Remoting", 0},
  	{"System.Runtime.Serialization", 3},
  	{"System.Runtime.Serialization.Formatters.Soap", 0},
  	{"System.Security", 0},
  	{"System.ServiceModel.Web", 2},
  	{"System.ServiceProcess", 0},
  	{"System.Transactions", 0},
  	{"System.Web", 0},
  	{"System.Web.Abstractions", 2},
  	{"System.Web.DynamicData", 2},
  	{"System.Web.Extensions", 2},
  	{"System.Web.Mobile", 0},
  	{"System.Web.Routing", 2},
  	{"System.Web.Services", 0},
  	{"System.Windows.Forms", 0},
  	{"System.Xml", 0},
  	{"System.Xml.Linq", 2},
  	{"WindowsBase", 3},
  	{"mscorlib", 0}
  };
  #endif
  
  /*
   * keeps track of loaded assemblies
   */
  static GList *loaded_assemblies = NULL;
  static MonoAssembly *corlib;
  
  #if defined(__native_client__)
  
  /* On Native Client, allow mscorlib to be loaded from memory  */
  /* instead of loaded off disk.  If these are not set, default */
  /* mscorlib loading will take place                           */
  
  /* NOTE: If mscorlib data is passed to mono in this way then */
  /* it needs to remain allocated during the use of mono.      */
  
  static void *corlibData = NULL;
  static size_t corlibSize = 0;
  
  void
  mono_set_corlib_data (void *data, size_t size)
  {
    corlibData = data;
    corlibSize = size;
  }
  
  #endif
  
  /* This protects loaded_assemblies and image->references */
  #define mono_assemblies_lock() mono_mutex_lock (&assemblies_mutex)
  #define mono_assemblies_unlock() mono_mutex_unlock (&assemblies_mutex)
  static mono_mutex_t assemblies_mutex;
  
  /* If defined, points to the bundled assembly information */
  const MonoBundledAssembly **bundles;
  
  static mono_mutex_t assembly_binding_mutex;
  
  /* Loaded assembly binding info */
  static GSList *loaded_assembly_bindings = NULL;
  
  static MonoAssembly*
  mono_assembly_invoke_search_hook_internal (MonoAssemblyName *aname, MonoAssembly *requesting, gboolean refonly, gboolean postload);
  static MonoAssembly*
  mono_assembly_load_full_internal (MonoAssemblyName *aname, MonoAssembly *requesting, const char *basedir, MonoImageOpenStatus *status, gboolean refonly);
  static MonoBoolean
  mono_assembly_is_in_gac (const gchar *filanem);
  
  static gchar*
  encode_public_tok (const guchar *token, gint32 len)
  {
  	const static gchar allowed [] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
  	gchar *res;
  	int i;
  
  	res = g_malloc (len * 2 + 1);
  	for (i = 0; i < len; i++) {
  		res [i * 2] = allowed [token [i] >> 4];
  		res [i * 2 + 1] = allowed [token [i] & 0xF];
  	}
  	res [len * 2] = 0;
  	return res;
  }
  
  /**
   * mono_public_tokens_are_equal:
   * @pubt1: first public key token
   * @pubt2: second public key token
   *
   * Compare two public key tokens and return #TRUE is they are equal and #FALSE
   * otherwise.
   */
  gboolean
  mono_public_tokens_are_equal (const unsigned char *pubt1, const unsigned char *pubt2)
  {
  	return memcmp (pubt1, pubt2, 16) == 0;
  }
  
  /**
   * mono_set_assemblies_path:
   * @path: list of paths that contain directories where Mono will look for assemblies
   *
   * Use this method to override the standard assembly lookup system and
   * override any assemblies coming from the GAC.  This is the method
   * that supports the MONO_PATH variable.
   *
   * Notice that MONO_PATH and this method are really a very bad idea as
   * it prevents the GAC from working and it prevents the standard
   * resolution mechanisms from working.  Nonetheless, for some debugging
   * situations and bootstrapping setups, this is useful to have. 
   */
  void
  mono_set_assemblies_path (const char* path)
  {
  	char **splitted, **dest;
  
  	splitted = g_strsplit (path, G_SEARCHPATH_SEPARATOR_S, 1000);
  	if (assemblies_path)
  		g_strfreev (assemblies_path);
  	assemblies_path = dest = splitted;
  	while (*splitted) {
  		char *tmp = *splitted;
  		if (*tmp)
  			*dest++ = mono_path_canonicalize (tmp);
  		g_free (tmp);
  		splitted++;
  	}
  	*dest = *splitted;
  
  	if (g_getenv ("MONO_DEBUG") == NULL)
  		return;
  
  	splitted = assemblies_path;
  	while (*splitted) {
  		if (**splitted && !g_file_test (*splitted, G_FILE_TEST_IS_DIR))
  			g_warning ("'%s' in MONO_PATH doesn't exist or has wrong permissions.", *splitted);
  
  		splitted++;
  	}
  }
  
  /* Native Client can't get this info from an environment variable so */
  /* it's passed in to the runtime, or set manually by embedding code. */
  #ifdef __native_client__
  char* nacl_mono_path = NULL;
  #endif
  
  static void
  check_path_env (void)
  {
  	const char* path;
  	path = g_getenv ("MONO_PATH");
  #ifdef __native_client__
  	if (!path)
  		path = nacl_mono_path;
  #endif
  	if (!path || assemblies_path != NULL)
  		return;
  
  	mono_set_assemblies_path(path);
  }
  
  static void
  check_extra_gac_path_env (void) {
  	const char *path;
  	char **splitted, **dest;
  	
  	path = g_getenv ("MONO_GAC_PREFIX");
  	if (!path)
  		return;
  
  	splitted = g_strsplit (path, G_SEARCHPATH_SEPARATOR_S, 1000);
  	if (extra_gac_paths)
  		g_strfreev (extra_gac_paths);
  	extra_gac_paths = dest = splitted;
  	while (*splitted){
  		if (**splitted)
  			*dest++ = *splitted;
  		splitted++;
  	}
  	*dest = *splitted;
  	
  	if (g_getenv ("MONO_DEBUG") == NULL)
  		return;
  
  	while (*splitted) {
  		if (**splitted && !g_file_test (*splitted, G_FILE_TEST_IS_DIR))
  			g_warning ("'%s' in MONO_GAC_PREFIX doesn't exist or has wrong permissions.", *splitted);
  
  		splitted++;
  	}
  }
  
  static gboolean
  assembly_binding_maps_name (MonoAssemblyBindingInfo *info, MonoAssemblyName *aname)
  {
  	if (!info || !info->name)
  		return FALSE;
  
  	if (strcmp (info->name, aname->name))
  		return FALSE;
  
  	if (info->major != aname->major || info->minor != aname->minor)
  		return FALSE;
  
  	if ((info->culture != NULL && info->culture [0]) != (aname->culture != NULL && aname->culture [0])) 
  		return FALSE;
  	
  	if (info->culture && aname->culture && strcmp (info->culture, aname->culture))
  		return FALSE;
  	
  	if (!mono_public_tokens_are_equal (info->public_key_token, aname->public_key_token))
  		return FALSE;
  
  	return TRUE;
  }
  
  static void
  mono_assembly_binding_info_free (MonoAssemblyBindingInfo *info)
  {
  	if (!info)
  		return;
  
  	g_free (info->name);
  	g_free (info->culture);
  }
  
  static void
  get_publisher_policy_info (MonoImage *image, MonoAssemblyName *aname, MonoAssemblyBindingInfo *binding_info)
  {
  	MonoTableInfo *t;
  	guint32 cols [MONO_MANIFEST_SIZE];
  	const gchar *filename;
  	gchar *subpath, *fullpath;
  
  	t = &image->tables [MONO_TABLE_MANIFESTRESOURCE];
  	/* MS Impl. accepts policy assemblies with more than
  	 * one manifest resource, and only takes the first one */
  	if (t->rows < 1) {
  		binding_info->is_valid = FALSE;
  		return;
  	}
  	
  	mono_metadata_decode_row (t, 0, cols, MONO_MANIFEST_SIZE);
  	if ((cols [MONO_MANIFEST_IMPLEMENTATION] & MONO_IMPLEMENTATION_MASK) != MONO_IMPLEMENTATION_FILE) {
  		binding_info->is_valid = FALSE;
  		return;
  	}
  	
  	filename = mono_metadata_string_heap (image, cols [MONO_MANIFEST_NAME]);
  	g_assert (filename != NULL);
  	
  	subpath = g_path_get_dirname (image->name);
  	fullpath = g_build_path (G_DIR_SEPARATOR_S, subpath, filename, NULL);
  	mono_config_parse_publisher_policy (fullpath, binding_info);
  	g_free (subpath);
  	g_free (fullpath);
  	
  	/* Define the optional elements/attributes before checking */
  	if (!binding_info->culture)
  		binding_info->culture = g_strdup ("");
  	
  	/* Check that the most important elements/attributes exist */
  	if (!binding_info->name || !binding_info->public_key_token [0] || !binding_info->has_old_version_bottom ||
  			!binding_info->has_new_version || !assembly_binding_maps_name (binding_info, aname)) {
  		mono_assembly_binding_info_free (binding_info);
  		binding_info->is_valid = FALSE;
  		return;
  	}
  
  	binding_info->is_valid = TRUE;
  }
  
  static int
  compare_versions (AssemblyVersionSet *v, MonoAssemblyName *aname)
  {
  	if (v->major > aname->major)
  		return 1;
  	else if (v->major < aname->major)
  		return -1;
  
  	if (v->minor > aname->minor)
  		return 1;
  	else if (v->minor < aname->minor)
  		return -1;
  
  	if (v->build > aname->build)
  		return 1;
  	else if (v->build < aname->build)
  		return -1;
  
  	if (v->revision > aname->revision)
  		return 1;
  	else if (v->revision < aname->revision)
  		return -1;
  
  	return 0;
  }
  
  static gboolean
  check_policy_versions (MonoAssemblyBindingInfo *info, MonoAssemblyName *name)
  {
  	if (!info->is_valid)
  		return FALSE;
  	
  	/* If has_old_version_top doesn't exist, we don't have an interval */
  	if (!info->has_old_version_top) {
  		if (compare_versions (&info->old_version_bottom, name) == 0)
  			return TRUE;
  
  		return FALSE;
  	}
  
  	/* Check that the version defined by name is valid for the interval */
  	if (compare_versions (&info->old_version_top, name) < 0)
  		return FALSE;
  
  	/* We should be greater or equal than the small version */
  	if (compare_versions (&info->old_version_bottom, name) > 0)
  		return FALSE;
  
  	return TRUE;
  }
  
  /**
   * mono_assembly_names_equal:
   * @l: first assembly
   * @r: second assembly.
   *
   * Compares two MonoAssemblyNames and returns whether they are equal.
   *
   * This compares the names, the cultures, the release version and their
   * public tokens.
   *
   * Returns: TRUE if both assembly names are equal.
   */
  gboolean
  mono_assembly_names_equal (MonoAssemblyName *l, MonoAssemblyName *r)
  {
  	if (!l->name || !r->name)
  		return FALSE;
  
  	if (strcmp (l->name, r->name))
  		return FALSE;
  
  	if (l->culture && r->culture && strcmp (l->culture, r->culture))
  		return FALSE;
  
  	if (l->major != r->major || l->minor != r->minor ||
  			l->build != r->build || l->revision != r->revision)
  		if (! ((l->major == 0 && l->minor == 0 && l->build == 0 && l->revision == 0) || (r->major == 0 && r->minor == 0 && r->build == 0 && r->revision == 0)))
  			return FALSE;
  
  	if (!l->public_key_token [0] || !r->public_key_token [0])
  		return TRUE;
  
  	if (!mono_public_tokens_are_equal (l->public_key_token, r->public_key_token))
  		return FALSE;
  
  	return TRUE;
  }
  
  static MonoAssembly *
  load_in_path (const char *basename, const char** search_path, MonoImageOpenStatus *status, MonoBoolean refonly)
  {
  	int i;
  	char *fullpath;
  	MonoAssembly *result;
  
  	for (i = 0; search_path [i]; ++i) {
  		fullpath = g_build_filename (search_path [i], basename, NULL);
  		result = mono_assembly_open_full (fullpath, status, refonly);
  		g_free (fullpath);
  		if (result)
  			return result;
  	}
  	return NULL;
  }
  
  /**
   * mono_assembly_setrootdir:
   * @root_dir: The pathname of the root directory where we will locate assemblies
   *
   * This routine sets the internal default root directory for looking up
   * assemblies.
   *
   * This is used by Windows installations to compute dynamically the
   * place where the Mono assemblies are located.
   *
   */
  void
  mono_assembly_setrootdir (const char *root_dir)
  {
  	/*
  	 * Override the MONO_ASSEMBLIES directory configured at compile time.
  	 */
  	/* Leak if called more than once */
  	default_path [0] = g_strdup (root_dir);
  }
  
  /**
   * mono_assembly_getrootdir:
   * 
   * Obtains the root directory used for looking up assemblies.
   *
   * Returns: a string with the directory, this string should not be freed.
   */
  G_CONST_RETURN gchar *
  mono_assembly_getrootdir (void)
  {
  	return default_path [0];
  }
  
  /**
   * mono_set_dirs:
   * @assembly_dir: the base directory for assemblies
   * @config_dir: the base directory for configuration files
   *
   * This routine is used internally and by developers embedding
   * the runtime into their own applications.
   *
   * There are a number of cases to consider: Mono as a system-installed
   * package that is available on the location preconfigured or Mono in
   * a relocated location.
   *
   * If you are using a system-installed Mono, you can pass NULL
   * to both parameters.  If you are not, you should compute both
   * directory values and call this routine.
   *
   * The values for a given PREFIX are:
   *
   *    assembly_dir: PREFIX/lib
   *    config_dir:   PREFIX/etc
   *
   * Notice that embedders that use Mono in a relocated way must
   * compute the location at runtime, as they will be in control
   * of where Mono is installed.
   */
  void
  mono_set_dirs (const char *assembly_dir, const char *config_dir)
  {
  	if (assembly_dir == NULL)
  		assembly_dir = mono_config_get_assemblies_dir ();
  	if (config_dir == NULL)
  		config_dir = mono_config_get_cfg_dir ();
  	mono_assembly_setrootdir (assembly_dir);
  	mono_set_config_dir (config_dir);
  }
  
  #ifndef HOST_WIN32
  
  static char *
  compute_base (char *path)
  {
  	char *p = strrchr (path, '/');
  	if (p == NULL)
  		return NULL;
  
  	/* Not a well known Mono executable, we are embedded, cant guess the base  */
  	if (strcmp (p, "/mono") && strcmp (p, "/mono-boehm") && strcmp (p, "/mono-sgen") && strcmp (p, "/pedump") && strcmp (p, "/monodis"))
  		return NULL;
  	    
  	*p = 0;
  	p = strrchr (path, '/');
  	if (p == NULL)
  		return NULL;
  	
  	if (strcmp (p, "/bin") != 0)
  		return NULL;
  	*p = 0;
  	return path;
  }
  
  static void
  fallback (void)
  {
  	mono_set_dirs (mono_config_get_assemblies_dir (), mono_config_get_cfg_dir ());
  }
  
  static G_GNUC_UNUSED void
  set_dirs (char *exe)
  {
  	char *base;
  	char *config, *lib, *mono;
  	struct stat buf;
  	const char *bindir;
  	
  	/*
  	 * Only /usr prefix is treated specially
  	 */
  	bindir = mono_config_get_bin_dir ();
  	g_assert (bindir);
  	if (strncmp (exe, bindir, strlen (bindir)) == 0 || (base = compute_base (exe)) == NULL){
  		fallback ();
  		return;
  	}
  
  	config = g_build_filename (base, "etc", NULL);
  	lib = g_build_filename (base, "lib", NULL);
  	mono = g_build_filename (lib, "mono/2.0", NULL);
  	if (stat (mono, &buf) == -1)
  		fallback ();
  	else {
  		mono_set_dirs (lib, config);
  	}
  	
  	g_free (config);
  	g_free (lib);
  	g_free (mono);
  }
  
  #endif /* HOST_WIN32 */
  
  /**
   * mono_set_rootdir:
   *
   * Registers the root directory for the Mono runtime, for Linux and Solaris 10,
   * this auto-detects the prefix where Mono was installed. 
   */
  void
  mono_set_rootdir (void)
  {
  #if defined(HOST_WIN32) || (defined(PLATFORM_MACOSX) && !defined(TARGET_ARM))
  	gchar *bindir, *installdir, *root, *name, *resolvedname, *config;
  
  #ifdef HOST_WIN32
  	name = mono_get_module_file_name ((HMODULE) &__ImageBase);
  #else
   	{
  		/* 
  		 * _NSGetExecutablePath may return -1 to indicate buf is not large
  		 *  enough, but we ignore that case to avoid having to do extra dynamic
  		 *  allocation for the path and hope that 4096 is enough - this is 
  		 *  ok in the Linux/Solaris case below at least...
  		 */
   		
  		gchar buf[4096];
   		guint buf_size = sizeof (buf);
   
  		name = NULL;
   		if (_NSGetExecutablePath (buf, &buf_size) == 0)
   			name = g_strdup (buf);
   
   		if (name == NULL) {
   			fallback ();
   			return;
   		}
   	}
  #endif
  
  	resolvedname = mono_path_resolve_symlinks (name);
  
  	bindir = g_path_get_dirname (resolvedname);
  	installdir = g_path_get_dirname (bindir);
  	root = g_build_path (G_DIR_SEPARATOR_S, installdir, "lib", NULL);
  
  	config = g_build_filename (root, "..", "etc", NULL);
  #ifdef HOST_WIN32
  	mono_set_dirs (root, config);
  #else
  	if (g_file_test (root, G_FILE_TEST_EXISTS) && g_file_test (config, G_FILE_TEST_EXISTS))
  		mono_set_dirs (root, config);
  	else
  		fallback ();
  #endif
  
  	g_free (config);
  	g_free (root);
  	g_free (installdir);
  	g_free (bindir);
  	g_free (name);
  	g_free (resolvedname);
  #elif defined(DISABLE_MONO_AUTODETECTION)
  	fallback ();
  #else
  	char buf [4096];
  	int  s;
  	char *str;
  
  	/* Linux style */
  	s = readlink ("/proc/self/exe", buf, sizeof (buf)-1);
  
  	if (s != -1){
  		buf [s] = 0;
  		set_dirs (buf);
  		return;
  	}
  
  	/* Solaris 10 style */
  	str = g_strdup_printf ("/proc/%d/path/a.out", getpid ());
  	s = readlink (str, buf, sizeof (buf)-1);
  	g_free (str);
  	if (s != -1){
  		buf [s] = 0;
  		set_dirs (buf);
  		return;
  	} 
  	fallback ();
  #endif
  }
  
  /**
   * mono_assemblies_init:
   *
   *  Initialize global variables used by this module.
   */
  void
  mono_assemblies_init (void)
  {
  	/*
  	 * Initialize our internal paths if we have not been initialized yet.
  	 * This happens when embedders use Mono.
  	 */
  	if (mono_assembly_getrootdir () == NULL)
  		mono_set_rootdir ();
  
  	check_path_env ();
  	check_extra_gac_path_env ();
  
  	mono_mutex_init_recursive (&assemblies_mutex);
  	mono_mutex_init (&assembly_binding_mutex);
  }
  
  static void
  mono_assembly_binding_lock (void)
  {
  	mono_locks_mutex_acquire (&assembly_binding_mutex, AssemblyBindingLock);
  }
  
  static void
  mono_assembly_binding_unlock (void)
  {
  	mono_locks_mutex_release (&assembly_binding_mutex, AssemblyBindingLock);
  }
  
  gboolean
  mono_assembly_fill_assembly_name (MonoImage *image, MonoAssemblyName *aname)
  {
  	MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLY];
  	guint32 cols [MONO_ASSEMBLY_SIZE];
  	gint32 machine, flags;
  
  	if (!t->rows)
  		return FALSE;
  
  	mono_metadata_decode_row (t, 0, cols, MONO_ASSEMBLY_SIZE);
  
  	aname->hash_len = 0;
  	aname->hash_value = NULL;
  	aname->name = mono_metadata_string_heap (image, cols [MONO_ASSEMBLY_NAME]);
  	aname->culture = mono_metadata_string_heap (image, cols [MONO_ASSEMBLY_CULTURE]);
  	aname->flags = cols [MONO_ASSEMBLY_FLAGS];
  	aname->major = cols [MONO_ASSEMBLY_MAJOR_VERSION];
  	aname->minor = cols [MONO_ASSEMBLY_MINOR_VERSION];
  	aname->build = cols [MONO_ASSEMBLY_BUILD_NUMBER];
  	aname->revision = cols [MONO_ASSEMBLY_REV_NUMBER];
  	aname->hash_alg = cols [MONO_ASSEMBLY_HASH_ALG];
  	if (cols [MONO_ASSEMBLY_PUBLIC_KEY]) {
  		guchar* token = g_malloc (8);
  		gchar* encoded;
  		const gchar* pkey;
  		int len;
  
  		pkey = mono_metadata_blob_heap (image, cols [MONO_ASSEMBLY_PUBLIC_KEY]);
  		len = mono_metadata_decode_blob_size (pkey, &pkey);
  		aname->public_key = (guchar*)pkey;
  
  		mono_digest_get_public_token (token, aname->public_key, len);
  		encoded = encode_public_tok (token, 8);
  		g_strlcpy ((char*)aname->public_key_token, encoded, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  
  		g_free (encoded);
  		g_free (token);
  	}
  	else {
  		aname->public_key = NULL;
  		memset (aname->public_key_token, 0, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  	}
  
  	if (cols [MONO_ASSEMBLY_PUBLIC_KEY]) {
  		aname->public_key = (guchar*)mono_metadata_blob_heap (image, cols [MONO_ASSEMBLY_PUBLIC_KEY]);
  	}
  	else
  		aname->public_key = 0;
  
  	machine = ((MonoCLIImageInfo*)(image->image_info))->cli_header.coff.coff_machine;
  	flags = ((MonoCLIImageInfo*)(image->image_info))->cli_cli_header.ch_flags;
  	switch (machine) {
  	case COFF_MACHINE_I386:
  		/* https://bugzilla.xamarin.com/show_bug.cgi?id=17632 */
  		if (flags & (CLI_FLAGS_32BITREQUIRED|CLI_FLAGS_PREFERRED32BIT))
  			aname->arch = MONO_PROCESSOR_ARCHITECTURE_X86;
  		else if ((flags & 0x70) == 0x70)
  			aname->arch = MONO_PROCESSOR_ARCHITECTURE_NONE;
  		else
  			aname->arch = MONO_PROCESSOR_ARCHITECTURE_MSIL;
  		break;
  	case COFF_MACHINE_IA64:
  		aname->arch = MONO_PROCESSOR_ARCHITECTURE_IA64;
  		break;
  	case COFF_MACHINE_AMD64:
  		aname->arch = MONO_PROCESSOR_ARCHITECTURE_AMD64;
  		break;
  	case COFF_MACHINE_ARM:
  		aname->arch = MONO_PROCESSOR_ARCHITECTURE_ARM;
  		break;
  	default:
  		break;
  	}
  
  	return TRUE;
  }
  
  /**
   * mono_stringify_assembly_name:
   * @aname: the assembly name.
   *
   * Convert @aname into its string format. The returned string is dynamically
   * allocated and should be freed by the caller.
   *
   * Returns: a newly allocated string with a string representation of
   * the assembly name.
   */
  char*
  mono_stringify_assembly_name (MonoAssemblyName *aname)
  {
  	const char *quote = (aname->name && g_ascii_isspace (aname->name [0])) ? "\"" : "";
  
  	return g_strdup_printf (
  		"%s%s%s, Version=%d.%d.%d.%d, Culture=%s, PublicKeyToken=%s%s",
  		quote, aname->name, quote,
  		aname->major, aname->minor, aname->build, aname->revision,
  		aname->culture && *aname->culture? aname->culture: "neutral",
  		aname->public_key_token [0] ? (char *)aname->public_key_token : "null",
  		(aname->flags & ASSEMBLYREF_RETARGETABLE_FLAG) ? ", Retargetable=Yes" : "");
  }
  
  static gchar*
  assemblyref_public_tok (MonoImage *image, guint32 key_index, guint32 flags)
  {
  	const gchar *public_tok;
  	int len;
  
  	public_tok = mono_metadata_blob_heap (image, key_index);
  	len = mono_metadata_decode_blob_size (public_tok, &public_tok);
  
  	if (flags & ASSEMBLYREF_FULL_PUBLIC_KEY_FLAG) {
  		guchar token [8];
  		mono_digest_get_public_token (token, (guchar*)public_tok, len);
  		return encode_public_tok (token, 8);
  	}
  
  	return encode_public_tok ((guchar*)public_tok, len);
  }
  
  /**
   * mono_assembly_addref:
   * @assemnly: the assembly to reference
   *
   * This routine increments the reference count on a MonoAssembly.
   * The reference count is reduced every time the method mono_assembly_close() is
   * invoked.
   */
  void
  mono_assembly_addref (MonoAssembly *assembly)
  {
  	InterlockedIncrement (&assembly->ref_count);
  }
  
  /*
   * CAUTION: This table must be kept in sync with
   *          ivkm/reflect/Fusion.cs
   */
  
  #define SILVERLIGHT_KEY "7cec85d7bea7798e"
  #define WINFX_KEY "31bf3856ad364e35"
  #define ECMA_KEY "b77a5c561934e089"
  #define MSFINAL_KEY "b03f5f7f11d50a3a"
  
  typedef struct {
  	const char *name;
  	const char *from;
  	const char *to;
  } KeyRemapEntry;
  
  static KeyRemapEntry key_remap_table[] = {
  	{ "Microsoft.CSharp", WINFX_KEY, MSFINAL_KEY },
  	{ "System", SILVERLIGHT_KEY, ECMA_KEY },
  	{ "System.ComponentModel.Composition", WINFX_KEY, ECMA_KEY },
  	{ "System.ComponentModel.DataAnnotations", "ddd0da4d3e678217", WINFX_KEY },
  	{ "System.Core", SILVERLIGHT_KEY, ECMA_KEY },
  	// FIXME: MS uses MSFINAL_KEY for .NET 4.5
  	{ "System.Net", SILVERLIGHT_KEY, MSFINAL_KEY },
  	{ "System.Numerics", WINFX_KEY, ECMA_KEY },
  	{ "System.Runtime.Serialization", SILVERLIGHT_KEY, ECMA_KEY },
  	{ "System.ServiceModel", WINFX_KEY, ECMA_KEY },
  	{ "System.ServiceModel.Web", SILVERLIGHT_KEY, WINFX_KEY },
  	{ "System.Windows", SILVERLIGHT_KEY, MSFINAL_KEY },
  	{ "System.Xml", SILVERLIGHT_KEY, ECMA_KEY },
  	{ "System.Xml.Linq", WINFX_KEY, ECMA_KEY },
  	{ "System.Xml.Serialization", WINFX_KEY, ECMA_KEY }
  };
  
  static void
  remap_keys (MonoAssemblyName *aname)
  {
  	int i;
  	for (i = 0; i < G_N_ELEMENTS (key_remap_table); i++) {
  		const KeyRemapEntry *entry = &key_remap_table [i];
  
  		if (strcmp (aname->name, entry->name) ||
  		    !mono_public_tokens_are_equal (aname->public_key_token, (const unsigned char*) entry->from))
  			continue;
  
  		memcpy (aname->public_key_token, entry->to, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  		     
  		mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY,
  			    "Remapped public key token of retargetable assembly %s from %s to %s",
  			    aname->name, entry->from, entry->to);
  		return;
  	}
  }
  
  static MonoAssemblyName *
  mono_assembly_remap_version (MonoAssemblyName *aname, MonoAssemblyName *dest_aname)
  {
  	const MonoRuntimeInfo *current_runtime;
  	int pos, first, last;
  
  	if (aname->name == NULL) return aname;
  
  	current_runtime = mono_get_runtime_info ();
  
  	if (aname->flags & ASSEMBLYREF_RETARGETABLE_FLAG) {
  		const AssemblyVersionSet* vset;
  
  		/* Remap to current runtime */
  		vset = &current_runtime->version_sets [0];
  
  		memcpy (dest_aname, aname, sizeof(MonoAssemblyName));
  		dest_aname->major = vset->major;
  		dest_aname->minor = vset->minor;
  		dest_aname->build = vset->build;
  		dest_aname->revision = vset->revision;
  		dest_aname->flags &= ~ASSEMBLYREF_RETARGETABLE_FLAG;
  
  		/* Remap assembly name */
  		if (!strcmp (aname->name, "System.Net"))
  			dest_aname->name = g_strdup ("System");
  		
  		remap_keys (dest_aname);
  
  		mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY,
  					"The request to load the retargetable assembly %s v%d.%d.%d.%d was remapped to %s v%d.%d.%d.%d",
  					aname->name,
  					aname->major, aname->minor, aname->build, aname->revision,
  					dest_aname->name,
  					vset->major, vset->minor, vset->build, vset->revision
  					);
  
  		return dest_aname;
  	}
  	
  #ifndef DISABLE_ASSEMBLY_REMAPPING
  	first = 0;
  	last = G_N_ELEMENTS (framework_assemblies) - 1;
  	
  	while (first <= last) {
  		int res;
  		pos = first + (last - first) / 2;
  		res = strcmp (aname->name, framework_assemblies[pos].assembly_name);
  		if (res == 0) {
  			const AssemblyVersionSet* vset;
  			int index = framework_assemblies[pos].version_set_index;
  			g_assert (index < G_N_ELEMENTS (current_runtime->version_sets));
  			vset = &current_runtime->version_sets [index];
  
  			if (aname->major == vset->major && aname->minor == vset->minor &&
  				aname->build == vset->build && aname->revision == vset->revision)
  				return aname;
  		
  			if ((aname->major | aname->minor | aname->build | aname->revision) != 0)
  				mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_ASSEMBLY,
  					"The request to load the assembly %s v%d.%d.%d.%d was remapped to v%d.%d.%d.%d",
  							aname->name,
  							aname->major, aname->minor, aname->build, aname->revision,
  							vset->major, vset->minor, vset->build, vset->revision
  							);
  			
  			memcpy (dest_aname, aname, sizeof(MonoAssemblyName));
  			dest_aname->major = vset->major;
  			dest_aname->minor = vset->minor;
  			dest_aname->build = vset->build;
  			dest_aname->revision = vset->revision;
  			return dest_aname;
  		} else if (res < 0) {
  			last = pos - 1;
  		} else {
  			first = pos + 1;
  		}
  	}
  #endif
  
  	return aname;
  }
  
  /*
   * mono_assembly_get_assemblyref:
   *
   *   Fill out ANAME with the assembly name of the INDEXth assembly reference in IMAGE.
   */
  void
  mono_assembly_get_assemblyref (MonoImage *image, int index, MonoAssemblyName *aname)
  {
  	MonoTableInfo *t;
  	guint32 cols [MONO_ASSEMBLYREF_SIZE];
  	const char *hash;
  
  	t = &image->tables [MONO_TABLE_ASSEMBLYREF];
  
  	mono_metadata_decode_row (t, index, cols, MONO_ASSEMBLYREF_SIZE);
  		
  	hash = mono_metadata_blob_heap (image, cols [MONO_ASSEMBLYREF_HASH_VALUE]);
  	aname->hash_len = mono_metadata_decode_blob_size (hash, &hash);
  	aname->hash_value = hash;
  	aname->name = mono_metadata_string_heap (image, cols [MONO_ASSEMBLYREF_NAME]);
  	aname->culture = mono_metadata_string_heap (image, cols [MONO_ASSEMBLYREF_CULTURE]);
  	aname->flags = cols [MONO_ASSEMBLYREF_FLAGS];
  	aname->major = cols [MONO_ASSEMBLYREF_MAJOR_VERSION];
  	aname->minor = cols [MONO_ASSEMBLYREF_MINOR_VERSION];
  	aname->build = cols [MONO_ASSEMBLYREF_BUILD_NUMBER];
  	aname->revision = cols [MONO_ASSEMBLYREF_REV_NUMBER];
  
  	if (cols [MONO_ASSEMBLYREF_PUBLIC_KEY]) {
  		gchar *token = assemblyref_public_tok (image, cols [MONO_ASSEMBLYREF_PUBLIC_KEY], aname->flags);
  		g_strlcpy ((char*)aname->public_key_token, token, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  		g_free (token);
  	} else {
  		memset (aname->public_key_token, 0, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  	}
  }
  
  void
  mono_assembly_load_reference (MonoImage *image, int index)
  {
  	MonoAssembly *reference;
  	MonoAssemblyName aname;
  	MonoImageOpenStatus status;
  
  	/*
  	 * image->references is shared between threads, so we need to access
  	 * it inside a critical section.
  	 */
  	mono_assemblies_lock ();
  	if (!image->references) {
  		MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLYREF];
  	
  		image->references = g_new0 (MonoAssembly *, t->rows + 1);
  		image->nreferences = t->rows;
  	}
  	reference = image->references [index];
  	mono_assemblies_unlock ();
  	if (reference)
  		return;
  
  	mono_assembly_get_assemblyref (image, index, &aname);
  
  	if (image->assembly && image->assembly->ref_only) {
  		/* We use the loaded corlib */
  		if (!strcmp (aname.name, "mscorlib"))
  			reference = mono_assembly_load_full_internal (&aname, image->assembly, image->assembly->basedir, &status, FALSE);
  		else {
  			reference = mono_assembly_loaded_full (&aname, TRUE);
  			if (!reference)
  				/* Try a postload search hook */
  				reference = mono_assembly_invoke_search_hook_internal (&aname, image->assembly, TRUE, TRUE);
  		}
  
  		/*
  		 * Here we must advice that the error was due to
  		 * a non loaded reference using the ReflectionOnly api
  		*/
  		if (!reference)
  			reference = REFERENCE_MISSING;
  	} else {
  		/* we first try without setting the basedir: this can eventually result in a ResolveAssembly
  		 * event which is the MS .net compatible behaviour (the assemblyresolve_event3.cs test has been fixed
  		 * accordingly, it would fail on the MS runtime before).
  		 * The second load attempt has the basedir set to keep compatibility with the old mono behavior, for
  		 * example bug-349190.2.cs and who knows how much more code in the wild.
  		 */
  		reference = mono_assembly_load_full_internal (&aname, image->assembly, NULL, &status, FALSE);
  		if (!reference && image->assembly)
  			reference = mono_assembly_load_full_internal (&aname, image->assembly, image->assembly->basedir, &status, FALSE);
  	}
  
  	if (reference == NULL){
  		char *extra_msg;
  
  		if (status == MONO_IMAGE_ERROR_ERRNO && errno == ENOENT) {
  			extra_msg = g_strdup_printf ("The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (%s).\n", image->assembly != NULL ? image->assembly->basedir : "" );
  		} else if (status == MONO_IMAGE_ERROR_ERRNO) {
  			extra_msg = g_strdup_printf ("System error: %s\n", strerror (errno));
  		} else if (status == MONO_IMAGE_MISSING_ASSEMBLYREF) {
  			extra_msg = g_strdup ("Cannot find an assembly referenced from this one.\n");
  		} else if (status == MONO_IMAGE_IMAGE_INVALID) {
  			extra_msg = g_strdup ("The file exists but is not a valid assembly.\n");
  		} else {
  			extra_msg = g_strdup ("");
  		}
  		
  		mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_ASSEMBLY, "The following assembly referenced from %s could not be loaded:\n"
  				   "     Assembly:   %s    (assemblyref_index=%d)\n"
  				   "     Version:    %d.%d.%d.%d\n"
  				   "     Public Key: %s\n%s",
  				   image->name, aname.name, index,
  				   aname.major, aname.minor, aname.build, aname.revision,
  				   strlen ((char*)aname.public_key_token) == 0 ? "(none)" : (char*)aname.public_key_token, extra_msg);
  		g_free (extra_msg);
  	}
  
  	mono_assemblies_lock ();
  	if (reference == NULL) {
  		/* Flag as not found */
  		reference = REFERENCE_MISSING;
  	}	
  
  	if (!image->references [index]) {
  		if (reference != REFERENCE_MISSING){
  			mono_assembly_addref (reference);
  			if (image->assembly)
  				mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Assembly Ref addref %s[%p] -> %s[%p]: %d",
  				    image->assembly->aname.name, image->assembly, reference->aname.name, reference, reference->ref_count);
  		} else {
  			if (image->assembly)
  				mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Failed to load assembly %s[%p]\n",
  				    image->assembly->aname.name, image->assembly);
  		}
  		
  		image->references [index] = reference;
  	}
  	mono_assemblies_unlock ();
  
  	if (image->references [index] != reference) {
  		/* Somebody loaded it before us */
  		mono_assembly_close (reference);
  	}
  }
  
  void
  mono_assembly_load_references (MonoImage *image, MonoImageOpenStatus *status)
  {
  	/* This is a no-op now but it is part of the embedding API so we can't remove it */
  	*status = MONO_IMAGE_OK;
  }
  
  typedef struct AssemblyLoadHook AssemblyLoadHook;
  struct AssemblyLoadHook {
  	AssemblyLoadHook *next;
  	MonoAssemblyLoadFunc func;
  	gpointer user_data;
  };
  
  AssemblyLoadHook *assembly_load_hook = NULL;
  
  void
  mono_assembly_invoke_load_hook (MonoAssembly *ass)
  {
  	AssemblyLoadHook *hook;
  
  	for (hook = assembly_load_hook; hook; hook = hook->next) {
  		hook->func (ass, hook->user_data);
  	}
  }
  
  void
  mono_install_assembly_load_hook (MonoAssemblyLoadFunc func, gpointer user_data)
  {
  	AssemblyLoadHook *hook;
  	
  	g_return_if_fail (func != NULL);
  
  	hook = g_new0 (AssemblyLoadHook, 1);
  	hook->func = func;
  	hook->user_data = user_data;
  	hook->next = assembly_load_hook;
  	assembly_load_hook = hook;
  }
  
  static void
  free_assembly_load_hooks (void)
  {
  	AssemblyLoadHook *hook, *next;
  
  	for (hook = assembly_load_hook; hook; hook = next) {
  		next = hook->next;
  		g_free (hook);
  	}
  }
  
  typedef struct AssemblySearchHook AssemblySearchHook;
  struct AssemblySearchHook {
  	AssemblySearchHook *next;
  	MonoAssemblySearchFunc func;
  	gboolean refonly;
  	gboolean postload;
  	gpointer user_data;
  };
  
  AssemblySearchHook *assembly_search_hook = NULL;
  
  static MonoAssembly*
  mono_assembly_invoke_search_hook_internal (MonoAssemblyName *aname, MonoAssembly *requesting, gboolean refonly, gboolean postload)
  {
  	AssemblySearchHook *hook;
  
  	for (hook = assembly_search_hook; hook; hook = hook->next) {
  		if ((hook->refonly == refonly) && (hook->postload == postload)) {
  			MonoAssembly *ass;
  			/**
  			  * A little explanation is in order here.
  			  *
  			  * The default postload search hook needs to know the requesting assembly to report it to managed code.
  			  * The embedding API exposes a search hook that doesn't take such argument.
  			  *
  			  * The original fix would call the default search hook before all the registered ones and pass
  			  * the requesting assembly to it. It works but broke a very suddle embedding API aspect that some users
  			  * rely on. Which is the ordering between user hooks and the default runtime hook.
  			  *
  			  * Registering the hook after mono_jit_init would let your hook run before the default one and
  			  * when using it to handle non standard app layouts this could save your app from a massive amount
  			  * of syscalls that the default hook does when probing all sorts of places. Slow targets with horrible IO
  			  * are all using this trick and if we broke this assumption they would be very disapointed at us.
  			  *
  			  * So what's the fix? We register the default hook using regular means and special case it when iterating
  			  * over the registered hooks. This preserves ordering and enables managed resolve hooks to get the requesting
  			  * assembly.
  			  */
  			if (hook->func == (void*)mono_domain_assembly_postload_search)
  				ass = mono_domain_assembly_postload_search (aname, requesting, refonly);
  			else
  				ass = hook->func (aname, hook->user_data);
  			if (ass)
  				return ass;
  		}
  	}
  
  	return NULL;
  }
  
  MonoAssembly*
  mono_assembly_invoke_search_hook (MonoAssemblyName *aname)
  {
  	return mono_assembly_invoke_search_hook_internal (aname, NULL, FALSE, FALSE);
  }
  
  static void
  mono_install_assembly_search_hook_internal (MonoAssemblySearchFunc func, gpointer user_data, gboolean refonly, gboolean postload)
  {
  	AssemblySearchHook *hook;
  	
  	g_return_if_fail (func != NULL);
  
  	hook = g_new0 (AssemblySearchHook, 1);
  	hook->func = func;
  	hook->user_data = user_data;
  	hook->refonly = refonly;
  	hook->postload = postload;
  	hook->next = assembly_search_hook;
  	assembly_search_hook = hook;
  }
  
  void          
  mono_install_assembly_search_hook (MonoAssemblySearchFunc func, gpointer user_data)
  {
  	mono_install_assembly_search_hook_internal (func, user_data, FALSE, FALSE);
  }	
  
  static void
  free_assembly_search_hooks (void)
  {
  	AssemblySearchHook *hook, *next;
  
  	for (hook = assembly_search_hook; hook; hook = next) {
  		next = hook->next;
  		g_free (hook);
  	}
  }
  
  void
  mono_install_assembly_refonly_search_hook (MonoAssemblySearchFunc func, gpointer user_data)
  {
  	mono_install_assembly_search_hook_internal (func, user_data, TRUE, FALSE);
  }
  
  void          
  mono_install_assembly_postload_search_hook (MonoAssemblySearchFunc func, gpointer user_data)
  {
  	mono_install_assembly_search_hook_internal (func, user_data, FALSE, TRUE);
  }	
  
  void
  mono_install_assembly_postload_refonly_search_hook (MonoAssemblySearchFunc func, gpointer user_data)
  {
  	mono_install_assembly_search_hook_internal (func, user_data, TRUE, TRUE);
  }
  
  typedef struct AssemblyPreLoadHook AssemblyPreLoadHook;
  struct AssemblyPreLoadHook {
  	AssemblyPreLoadHook *next;
  	MonoAssemblyPreLoadFunc func;
  	gpointer user_data;
  };
  
  static AssemblyPreLoadHook *assembly_preload_hook = NULL;
  static AssemblyPreLoadHook *assembly_refonly_preload_hook = NULL;
  
  static MonoAssembly *
  invoke_assembly_preload_hook (MonoAssemblyName *aname, gchar **assemblies_path)
  {
  	AssemblyPreLoadHook *hook;
  	MonoAssembly *assembly;
  
  	for (hook = assembly_preload_hook; hook; hook = hook->next) {
  		assembly = hook->func (aname, assemblies_path, hook->user_data);
  		if (assembly != NULL)
  			return assembly;
  	}
  
  	return NULL;
  }
  
  static MonoAssembly *
  invoke_assembly_refonly_preload_hook (MonoAssemblyName *aname, gchar **assemblies_path)
  {
  	AssemblyPreLoadHook *hook;
  	MonoAssembly *assembly;
  
  	for (hook = assembly_refonly_preload_hook; hook; hook = hook->next) {
  		assembly = hook->func (aname, assemblies_path, hook->user_data);
  		if (assembly != NULL)
  			return assembly;
  	}
  
  	return NULL;
  }
  
  void
  mono_install_assembly_preload_hook (MonoAssemblyPreLoadFunc func, gpointer user_data)
  {
  	AssemblyPreLoadHook *hook;
  	
  	g_return_if_fail (func != NULL);
  
  	hook = g_new0 (AssemblyPreLoadHook, 1);
  	hook->func = func;
  	hook->user_data = user_data;
  	hook->next = assembly_preload_hook;
  	assembly_preload_hook = hook;
  }
  
  void
  mono_install_assembly_refonly_preload_hook (MonoAssemblyPreLoadFunc func, gpointer user_data)
  {
  	AssemblyPreLoadHook *hook;
  	
  	g_return_if_fail (func != NULL);
  
  	hook = g_new0 (AssemblyPreLoadHook, 1);
  	hook->func = func;
  	hook->user_data = user_data;
  	hook->next = assembly_refonly_preload_hook;
  	assembly_refonly_preload_hook = hook;
  }
  
  static void
  free_assembly_preload_hooks (void)
  {
  	AssemblyPreLoadHook *hook, *next;
  
  	for (hook = assembly_preload_hook; hook; hook = next) {
  		next = hook->next;
  		g_free (hook);
  	}
  
  	for (hook = assembly_refonly_preload_hook; hook; hook = next) {
  		next = hook->next;
  		g_free (hook);
  	}
  }
  
  static gchar *
  absolute_dir (const gchar *filename)
  {
  	gchar *cwd;
  	gchar *mixed;
  	gchar **parts;
  	gchar *part;
  	GList *list, *tmp;
  	GString *result;
  	gchar *res;
  	gint i;
  
  	if (g_path_is_absolute (filename)) {
  		part = g_path_get_dirname (filename);
  		res = g_strconcat (part, G_DIR_SEPARATOR_S, NULL);
  		g_free (part);
  		return res;
  	}
  
  	cwd = g_get_current_dir ();
  	mixed = g_build_filename (cwd, filename, NULL);
  	parts = g_strsplit (mixed, G_DIR_SEPARATOR_S, 0);
  	g_free (mixed);
  	g_free (cwd);
  
  	list = NULL;
  	for (i = 0; (part = parts [i]) != NULL; i++) {
  		if (!strcmp (part, "."))
  			continue;
  
  		if (!strcmp (part, "..")) {
  			if (list && list->next) /* Don't remove root */
  				list = g_list_delete_link (list, list);
  		} else {
  			list = g_list_prepend (list, part);
  		}
  	}
  
  	result = g_string_new ("");
  	list = g_list_reverse (list);
  
  	/* Ignores last data pointer, which should be the filename */
  	for (tmp = list; tmp && tmp->next != NULL; tmp = tmp->next){
  		if (tmp->data)
  			g_string_append_printf (result, "%s%c", (char *) tmp->data,
  								G_DIR_SEPARATOR);
  	}
  
  	res = result->str;
  	g_string_free (result, FALSE);
  	g_list_free (list);
  	g_strfreev (parts);
  	if (*res == '\0') {
  		g_free (res);
  		return g_strdup (".");
  	}
  
  	return res;
  }
  
  /** 
   * mono_assembly_open_from_bundle:
   * @filename: Filename requested
   * @status: return value
   *
   * This routine tries to open the assembly specified by `filename' from the
   * defined bundles, if found, returns the MonoImage for it, if not found
   * returns NULL
   */
  MonoImage *
  mono_assembly_open_from_bundle (const char *filename, MonoImageOpenStatus *status, gboolean refonly)
  {
  	int i;
  	char *name;
  	MonoImage *image = NULL;
  
  	/*
  	 * we do a very simple search for bundled assemblies: it's not a general 
  	 * purpose assembly loading mechanism.
  	 */
  
  	if (!bundles)
  		return NULL;
  
  	name = g_path_get_basename (filename);
  
  	mono_assemblies_lock ();
  	for (i = 0; !image && bundles [i]; ++i) {
  		if (strcmp (bundles [i]->name, name) == 0) {
  			image = mono_image_open_from_data_with_name ((char*)bundles [i]->data, bundles [i]->size, FALSE, status, refonly, name);
  			break;
  		}
  	}
  	mono_assemblies_unlock ();
  	if (image) {
  		mono_image_addref (image);
  		mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Assembly Loader loaded assembly from bundle: '%s'.", name);
  		g_free (name);
  		return image;
  	}
  	g_free (name);
  	return NULL;
  }
  
  MonoAssembly *
  mono_assembly_open_full (const char *filename, MonoImageOpenStatus *status, gboolean refonly)
  {
  	MonoImage *image;
  	MonoAssembly *ass;
  	MonoImageOpenStatus def_status;
  	gchar *fname;
  	gchar *new_fname;
  	gboolean loaded_from_bundle;
  	
  	g_return_val_if_fail (filename != NULL, NULL);
  
  	if (!status)
  		status = &def_status;
  	*status = MONO_IMAGE_OK;
  
  	if (strncmp (filename, "file://", 7) == 0) {
  		GError *error = NULL;
  		gchar *uri = (gchar *) filename;
  		gchar *tmpuri;
  
  		/*
  		 * MS allows file://c:/... and fails on file://localhost/c:/... 
  		 * They also throw an IndexOutOfRangeException if "file://"
  		 */
  		if (uri [7] != '/')
  			uri = g_strdup_printf ("file:///%s", uri + 7);
  	
  		tmpuri = uri;
  		uri = mono_escape_uri_string (tmpuri);
  		fname = g_filename_from_uri (uri, NULL, &error);
  		g_free (uri);
  
  		if (tmpuri != filename)
  			g_free (tmpuri);
  
  		if (error != NULL) {
  			g_warning ("%s\n", error->message);
  			g_error_free (error);
  			fname = g_strdup (filename);
  		}
  	} else {
  		fname = g_strdup (filename);
  	}
  
  	mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY,
  			"Assembly Loader probing location: '%s'.", fname);
  
  	new_fname = NULL;
  	if (!mono_assembly_is_in_gac (fname))
  		new_fname = mono_make_shadow_copy (fname);
  	if (new_fname && new_fname != fname) {
  		g_free (fname);
  		fname = new_fname;
  		mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY,
  			    "Assembly Loader shadow-copied assembly to: '%s'.", fname);
  	}
  	
  	image = NULL;
  
  	loaded_from_bundle = FALSE;
  	if (bundles != NULL) {
  		image = mono_assembly_open_from_bundle (fname, status, refonly);
  		loaded_from_bundle = image != NULL;
  	}
  
  	if (!image)
  		image = mono_image_open_full (fname, status, refonly);
  
  	if (!image){
  		if (*status == MONO_IMAGE_OK)
  			*status = MONO_IMAGE_ERROR_ERRNO;
  		g_free (fname);
  		return NULL;
  	}
  
  	if (image->assembly) {
  		/* Already loaded by another appdomain */
  		mono_assembly_invoke_load_hook (image->assembly);
  		mono_image_close (image);
  		g_free (fname);
  		return image->assembly;
  	}
  
  	ass = mono_assembly_load_from_full (image, fname, status, refonly);
  
  	if (ass) {
  		if (!loaded_from_bundle)
  			mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY,
  				"Assembly Loader loaded assembly from location: '%s'.", filename);
  		if (!refonly)
  			mono_config_for_assembly (ass->image);
  	}
  
  	/* Clear the reference added by mono_image_open */
  	mono_image_close (image);
  	
  	g_free (fname);
  
  	return ass;
  }
  
  static void
  free_item (gpointer val, gpointer user_data)
  {
  	g_free (val);
  }
  
  /*
   * mono_assembly_load_friends:
   * @ass: an assembly
   *
   * Load the list of friend assemblies that are allowed to access
   * the assembly's internal types and members. They are stored as assembly
   * names in custom attributes.
   *
   * This is an internal method, we need this because when we load mscorlib
   * we do not have the mono_defaults.internals_visible_class loaded yet,
   * so we need to load these after we initialize the runtime. 
   *
   * LOCKING: Acquires the assemblies lock plus the loader lock.
   */
  void
  mono_assembly_load_friends (MonoAssembly* ass)
  {
  	int i;
  	MonoCustomAttrInfo* attrs;
  	GSList *list;
  
  	if (ass->friend_assembly_names_inited)
  		return;
  
  	attrs = mono_custom_attrs_from_assembly (ass);
  	if (!attrs) {
  		mono_assemblies_lock ();
  		ass->friend_assembly_names_inited = TRUE;
  		mono_assemblies_unlock ();
  		return;
  	}
  
  	mono_assemblies_lock ();
  	if (ass->friend_assembly_names_inited) {
  		mono_assemblies_unlock ();
  		return;
  	}
  	mono_assemblies_unlock ();
  
  	list = NULL;
  	/* 
  	 * We build the list outside the assemblies lock, the worse that can happen
  	 * is that we'll need to free the allocated list.
  	 */
  	for (i = 0; i < attrs->num_attrs; ++i) {
  		MonoCustomAttrEntry *attr = &attrs->attrs [i];
  		MonoAssemblyName *aname;
  		const gchar *data;
  		/* Do some sanity checking */
  		if (!attr->ctor || attr->ctor->klass != mono_defaults.internals_visible_class)
  			continue;
  		if (attr->data_size < 4)
  			continue;
  		data = (const char*)attr->data;
  		/* 0xFF means null string, see custom attr format */
  		if (data [0] != 1 || data [1] != 0 || (data [2] & 0xFF) == 0xFF)
  			continue;
  		mono_metadata_decode_value (data + 2, &data);
  		aname = g_new0 (MonoAssemblyName, 1);
  		/*g_print ("friend ass: %s\n", data);*/
  		if (mono_assembly_name_parse_full (data, aname, TRUE, NULL, NULL)) {
  			list = g_slist_prepend (list, aname);
  		} else {
  			g_free (aname);
  		}
  	}
  	mono_custom_attrs_free (attrs);
  
  	mono_assemblies_lock ();
  	if (ass->friend_assembly_names_inited) {
  		mono_assemblies_unlock ();
  		g_slist_foreach (list, free_item, NULL);
  		g_slist_free (list);
  		return;
  	}
  	ass->friend_assembly_names = list;
  
  	/* Because of the double checked locking pattern above */
  	mono_memory_barrier ();
  	ass->friend_assembly_names_inited = TRUE;
  	mono_assemblies_unlock ();
  }
  
  /**
   * mono_assembly_open:
   * @filename: Opens the assembly pointed out by this name
   * @status: where a status code can be returned
   *
   * mono_assembly_open opens the PE-image pointed by @filename, and
   * loads any external assemblies referenced by it.
   *
   * Return: a pointer to the MonoAssembly if @filename contains a valid
   * assembly or NULL on error.  Details about the error are stored in the
   * @status variable.
   */
  MonoAssembly *
  mono_assembly_open (const char *filename, MonoImageOpenStatus *status)
  {
  	return mono_assembly_open_full (filename, status, FALSE);
  }
  
  MonoAssembly *
  mono_assembly_load_from_full (MonoImage *image, const char*fname, 
  			      MonoImageOpenStatus *status, gboolean refonly)
  {
  	MonoAssembly *ass, *ass2;
  	char *base_dir;
  
  	if (!image->tables [MONO_TABLE_ASSEMBLY].rows) {
  		/* 'image' doesn't have a manifest -- maybe someone is trying to Assembly.Load a .netmodule */
  		*status = MONO_IMAGE_IMAGE_INVALID;
  		return NULL;
  	}
  
  #if defined (HOST_WIN32)
  	{
  		gchar *tmp_fn;
  		int i;
  
  		tmp_fn = g_strdup (fname);
  		for (i = strlen (tmp_fn) - 1; i >= 0; i--) {
  			if (tmp_fn [i] == '/')
  				tmp_fn [i] = '\\';
  		}
  
  		base_dir = absolute_dir (tmp_fn);
  		g_free (tmp_fn);
  	}
  #else
  	base_dir = absolute_dir (fname);
  #endif
  
  	/*
  	 * Create assembly struct, and enter it into the assembly cache
  	 */
  	ass = g_new0 (MonoAssembly, 1);
  	ass->basedir = base_dir;
  	ass->ref_only = refonly;
  	ass->image = image;
  
  	mono_profiler_assembly_event (ass, MONO_PROFILE_START_LOAD);
  
  	mono_assembly_fill_assembly_name (image, &ass->aname);
  
  	if (mono_defaults.corlib && strcmp (ass->aname.name, "mscorlib") == 0) {
  		// MS.NET doesn't support loading other mscorlibs
  		g_free (ass);
  		g_free (base_dir);
  		mono_image_addref (mono_defaults.corlib);
  		*status = MONO_IMAGE_OK;
  		return mono_defaults.corlib->assembly;
  	}
  
  	/* Add a non-temporary reference because of ass->image */
  	mono_image_addref (image);
  
  	mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Image addref %s[%p] -> %s[%p]: %d", ass->aname.name, ass, image->name, image, image->ref_count);
  
  	/* 
  	 * The load hooks might take locks so we can't call them while holding the
  	 * assemblies lock.
  	 */
  	if (ass->aname.name) {
  		ass2 = mono_assembly_invoke_search_hook_internal (&ass->aname, NULL, refonly, FALSE);
  		if (ass2) {
  			g_free (ass);
  			g_free (base_dir);
  			mono_image_close (image);
  			*status = MONO_IMAGE_OK;
  			return ass2;
  		}
  	}
  
  	mono_assemblies_lock ();
  
  	if (image->assembly) {
  		/* 
  		 * This means another thread has already loaded the assembly, but not yet
  		 * called the load hooks so the search hook can't find the assembly.
  		 */
  		mono_assemblies_unlock ();
  		ass2 = image->assembly;
  		g_free (ass);
  		g_free (base_dir);
  		mono_image_close (image);
  		*status = MONO_IMAGE_OK;
  		return ass2;
  	}
  
  	image->assembly = ass;
  
  	loaded_assemblies = g_list_prepend (loaded_assemblies, ass);
  	mono_assemblies_unlock ();
  
  #ifdef HOST_WIN32
  	if (image->is_module_handle)
  		mono_image_fixup_vtable (image);
  #endif
  
  	mono_assembly_invoke_load_hook (ass);
  
  	mono_profiler_assembly_loaded (ass, MONO_PROFILE_OK);
  	
  	return ass;
  }
  
  MonoAssembly *
  mono_assembly_load_from (MonoImage *image, const char *fname,
  			 MonoImageOpenStatus *status)
  {
  	return mono_assembly_load_from_full (image, fname, status, FALSE);
  }
  
  /**
   * mono_assembly_name_free:
   * @aname: assembly name to free
   * 
   * Frees the provided assembly name object.
   * (it does not frees the object itself, only the name members).
   */
  void
  mono_assembly_name_free (MonoAssemblyName *aname)
  {
  	if (aname == NULL)
  		return;
  
  	g_free ((void *) aname->name);
  	g_free ((void *) aname->culture);
  	g_free ((void *) aname->hash_value);
  }
  
  static gboolean
  parse_public_key (const gchar *key, gchar** pubkey, gboolean *is_ecma)
  {
  	const gchar *pkey;
  	gchar header [16], val, *arr;
  	gint i, j, offset, bitlen, keylen, pkeylen;
  	
  	keylen = strlen (key) >> 1;
  	if (keylen < 1)
  		return FALSE;
  
  	/* allow the ECMA standard key */
  	if (strcmp (key, "00000000000000000400000000000000") == 0) {
  		if (pubkey) {
  			*pubkey = g_strdup (key);
  			*is_ecma = TRUE;
  		}
  		return TRUE;
  	}
  	*is_ecma = FALSE;
  	val = g_ascii_xdigit_value (key [0]) << 4;
  	val |= g_ascii_xdigit_value (key [1]);
  	switch (val) {
  		case 0x00:
  			if (keylen < 13)
  				return FALSE;
  			val = g_ascii_xdigit_value (key [24]);
  			val |= g_ascii_xdigit_value (key [25]);
  			if (val != 0x06)
  				return FALSE;
  			pkey = key + 24;
  			break;
  		case 0x06:
  			pkey = key;
  			break;
  		default:
  			return FALSE;
  	}
  		
  	/* We need the first 16 bytes
  	* to check whether this key is valid or not */
  	pkeylen = strlen (pkey) >> 1;
  	if (pkeylen < 16)
  		return FALSE;
  		
  	for (i = 0, j = 0; i < 16; i++) {
  		header [i] = g_ascii_xdigit_value (pkey [j++]) << 4;
  		header [i] |= g_ascii_xdigit_value (pkey [j++]);
  	}
  
  	if (header [0] != 0x06 || /* PUBLICKEYBLOB (0x06) */
  			header [1] != 0x02 || /* Version (0x02) */
  			header [2] != 0x00 || /* Reserved (word) */
  			header [3] != 0x00 ||
  			(guint)(read32 (header + 8)) != 0x31415352) /* DWORD magic = RSA1 */
  		return FALSE;
  
  	/* Based on this length, we _should_ be able to know if the length is right */
  	bitlen = read32 (header + 12) >> 3;
  	if ((bitlen + 16 + 4) != pkeylen)
  		return FALSE;
  
  	/* parsing is OK and the public key itself is not requested back */
  	if (!pubkey)
  		return TRUE;
  		
  	/* Encode the size of the blob */
  	offset = 0;
  	if (keylen <= 127) {
  		arr = g_malloc (keylen + 1);
  		arr [offset++] = keylen;
  	} else {
  		arr = g_malloc (keylen + 2);
  		arr [offset++] = 0x80; /* 10bs */
  		arr [offset++] = keylen;
  	}
  		
  	for (i = offset, j = 0; i < keylen + offset; i++) {
  		arr [i] = g_ascii_xdigit_value (key [j++]) << 4;
  		arr [i] |= g_ascii_xdigit_value (key [j++]);
  	}
  
  	*pubkey = arr;
  
  	return TRUE;
  }
  
  static gboolean
  build_assembly_name (const char *name, const char *version, const char *culture, const char *token, const char *key, guint32 flags, guint32 arch, MonoAssemblyName *aname, gboolean save_public_key)
  {
  	gint major, minor, build, revision;
  	gint len;
  	gint version_parts;
  	gchar *pkey, *pkeyptr, *encoded, tok [8];
  
  	memset (aname, 0, sizeof (MonoAssemblyName));
  
  	if (version) {
  		version_parts = sscanf (version, "%u.%u.%u.%u", &major, &minor, &build, &revision);
  		if (version_parts < 2 || version_parts > 4)
  			return FALSE;
  
  		/* FIXME: we should set build & revision to -1 (instead of 0)
  		if these are not set in the version string. That way, later on,
  		we can still determine if these were specified.	*/
  		aname->major = major;
  		aname->minor = minor;
  		if (version_parts >= 3)
  			aname->build = build;
  		else
  			aname->build = 0;
  		if (version_parts == 4)
  			aname->revision = revision;
  		else
  			aname->revision = 0;
  	}
  	
  	aname->flags = flags;
  	aname->arch = arch;
  	aname->name = g_strdup (name);
  	
  	if (culture) {
  		if (g_ascii_strcasecmp (culture, "neutral") == 0)
  			aname->culture = g_strdup ("");
  		else
  			aname->culture = g_strdup (culture);
  	}
  	
  	if (token && strncmp (token, "null", 4) != 0) {
  		char *lower;
  
  		/* the constant includes the ending NULL, hence the -1 */
  		if (strlen (token) != (MONO_PUBLIC_KEY_TOKEN_LENGTH - 1)) {
  			mono_assembly_name_free (aname);
  			return FALSE;
  		}
  		lower = g_ascii_strdown (token, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  		g_strlcpy ((char*)aname->public_key_token, lower, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  		g_free (lower);
  	}
  
  	if (key) {
  		gboolean is_ecma;
  		if (strcmp (key, "null") == 0 || !parse_public_key (key, &pkey, &is_ecma)) {
  			mono_assembly_name_free (aname);
  			return FALSE;
  		}
  
  		if (is_ecma) {
  			if (save_public_key)
  				aname->public_key = (guint8*)pkey;
  			else
  				g_free (pkey);
  			g_strlcpy ((gchar*)aname->public_key_token, "b77a5c561934e089", MONO_PUBLIC_KEY_TOKEN_LENGTH);
  			return TRUE;
  		}
  		
  		len = mono_metadata_decode_blob_size ((const gchar *) pkey, (const gchar **) &pkeyptr);
  		// We also need to generate the key token
  		mono_digest_get_public_token ((guchar*) tok, (guint8*) pkeyptr, len);
  		encoded = encode_public_tok ((guchar*) tok, 8);
  		g_strlcpy ((gchar*)aname->public_key_token, encoded, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  		g_free (encoded);
  
  		if (save_public_key)
  			aname->public_key = (guint8*) pkey;
  		else
  			g_free (pkey);
  	}
  
  	return TRUE;
  }
  
  static gboolean
  parse_assembly_directory_name (const char *name, const char *dirname, MonoAssemblyName *aname)
  {
  	gchar **parts;
  	gboolean res;
  	
  	parts = g_strsplit (dirname, "_", 3);
  	if (!parts || !parts[0] || !parts[1] || !parts[2]) {
  		g_strfreev (parts);
  		return FALSE;
  	}
  	
  	res = build_assembly_name (name, parts[0], parts[1], parts[2], NULL, 0, 0, aname, FALSE);
  	g_strfreev (parts);
  	return res;
  }
  
  static gboolean
  split_key_value (const gchar *pair, gchar **key, guint32 *keylen, gchar **value)
  {
  	char *eqsign = strchr (pair, '=');
  	if (!eqsign) {
  		*key = NULL;
  		*keylen = 0;
  		*value = NULL;
  		return FALSE;
  	}
  
  	*key = (gchar*)pair;
  	*keylen = eqsign - *key;
  	while (*keylen > 0 && g_ascii_isspace ((*key) [*keylen - 1]))
  		(*keylen)--;
  	*value = g_strstrip (eqsign + 1);
  	return TRUE;
  }
  
  gboolean
  mono_assembly_name_parse_full (const char *name, MonoAssemblyName *aname, gboolean save_public_key, gboolean *is_version_defined, gboolean *is_token_defined)
  {
  	gchar *dllname;
  	gchar *version = NULL;
  	gchar *culture = NULL;
  	gchar *token = NULL;
  	gchar *key = NULL;
  	gchar *retargetable = NULL;
  	gboolean res;
  	gchar *value, *part_name;
  	guint32 part_name_len;
  	gchar **parts;
  	gchar **tmp;
  	gboolean version_defined;
  	gboolean token_defined;
  	guint32 flags = 0;
  	guint32 arch = MONO_PROCESSOR_ARCHITECTURE_NONE;
  
  	if (!is_version_defined)
  		is_version_defined = &version_defined;
  	*is_version_defined = FALSE;
  	if (!is_token_defined)
  		is_token_defined = &token_defined;
  	*is_token_defined = FALSE;
  	
  	parts = tmp = g_strsplit (name, ",", 6);
  	if (!tmp || !*tmp) {
  		g_strfreev (tmp);
  		return FALSE;
  	}
  
  	dllname = g_strstrip (*tmp);
  	
  	tmp++;
  
  	while (*tmp) {
  		if (!split_key_value (g_strstrip (*tmp), &part_name, &part_name_len, &value))
  			goto cleanup_and_fail;
  
  		if (part_name_len == 7 && !g_ascii_strncasecmp (part_name, "Version", part_name_len)) {
  			*is_version_defined = TRUE;
  			version = value;
  			if (strlen (version) == 0) {
  				goto cleanup_and_fail;
  			}
  			tmp++;
  			continue;
  		}
  
  		if (part_name_len == 7 && !g_ascii_strncasecmp (part_name, "Culture", part_name_len)) {
  			culture = value;
  			if (strlen (culture) == 0) {
  				goto cleanup_and_fail;
  			}
  			tmp++;
  			continue;
  		}
  
  		if (part_name_len == 14 && !g_ascii_strncasecmp (part_name, "PublicKeyToken", part_name_len)) {
  			*is_token_defined = TRUE;
  			token = value;
  			if (strlen (token) == 0) {
  				goto cleanup_and_fail;
  			}
  			tmp++;
  			continue;
  		}
  
  		if (part_name_len == 9 && !g_ascii_strncasecmp (part_name, "PublicKey", part_name_len)) {
  			key = value;
  			if (strlen (key) == 0) {
  				goto cleanup_and_fail;
  			}
  			tmp++;
  			continue;
  		}
  
  		if (part_name_len == 12 && !g_ascii_strncasecmp (part_name, "Retargetable", part_name_len)) {
  			retargetable = value;
  			if (strlen (retargetable) == 0) {
  				goto cleanup_and_fail;
  			}
  			if (!g_ascii_strcasecmp (retargetable, "yes")) {
  				flags |= ASSEMBLYREF_RETARGETABLE_FLAG;
  			} else if (g_ascii_strcasecmp (retargetable, "no")) {
  				goto cleanup_and_fail;
  			}
  			tmp++;
  			continue;
  		}
  
  		if (part_name_len == 21 && !g_ascii_strncasecmp (part_name, "ProcessorArchitecture", part_name_len)) {
  			if (!g_ascii_strcasecmp (value, "MSIL"))
  				arch = MONO_PROCESSOR_ARCHITECTURE_MSIL;
  			else if (!g_ascii_strcasecmp (value, "X86"))
  				arch = MONO_PROCESSOR_ARCHITECTURE_X86;
  			else if (!g_ascii_strcasecmp (value, "IA64"))
  				arch = MONO_PROCESSOR_ARCHITECTURE_IA64;
  			else if (!g_ascii_strcasecmp (value, "AMD64"))
  				arch = MONO_PROCESSOR_ARCHITECTURE_AMD64;
  			else
  				goto cleanup_and_fail;
  			tmp++;
  			continue;
  		}
  
  		g_strfreev (parts);
  		return FALSE;
  	}
  
  	/* if retargetable flag is set, then we must have a fully qualified name */
  	if (retargetable != NULL && (version == NULL || culture == NULL || (key == NULL && token == NULL))) {
  		goto cleanup_and_fail;
  	}
  
  	res = build_assembly_name (dllname, version, culture, token, key, flags, arch,
  		aname, save_public_key);
  	g_strfreev (parts);
  	return res;
  
  cleanup_and_fail:
  	g_strfreev (parts);
  	return FALSE;
  }
  
  /**
   * mono_assembly_name_parse:
   * @name: name to parse
   * @aname: the destination assembly name
   * 
   * Parses an assembly qualified type name and assigns the name,
   * version, culture and token to the provided assembly name object.
   *
   * Returns: true if the name could be parsed.
   */
  gboolean
  mono_assembly_name_parse (const char *name, MonoAssemblyName *aname)
  {
  	return mono_assembly_name_parse_full (name, aname, FALSE, NULL, NULL);
  }
  
  /**
   * mono_assembly_name_new:
   * @name: name to parse
   *
   * Allocate a new MonoAssemblyName and fill its values from the
   * passed @name.
   *
   * Returns: a newly allocated structure or NULL if there was any failure.
   */
  MonoAssemblyName*
  mono_assembly_name_new (const char *name)
  {
  	MonoAssemblyName *aname = g_new0 (MonoAssemblyName, 1);
  	if (mono_assembly_name_parse (name, aname))
  		return aname;
  	g_free (aname);
  	return NULL;
  }
  
  const char*
  mono_assembly_name_get_name (MonoAssemblyName *aname)
  {
  	return aname->name;
  }
  
  const char*
  mono_assembly_name_get_culture (MonoAssemblyName *aname)
  {
  	return aname->culture;
  }
  
  mono_byte*
  mono_assembly_name_get_pubkeytoken (MonoAssemblyName *aname)
  {
  	if (aname->public_key_token [0])
  		return aname->public_key_token;
  	return NULL;
  }
  
  uint16_t
  mono_assembly_name_get_version (MonoAssemblyName *aname, uint16_t *minor, uint16_t *build, uint16_t *revision)
  {
  	if (minor)
  		*minor = aname->minor;
  	if (build)
  		*build = aname->build;
  	if (revision)
  		*revision = aname->revision;
  	return aname->major;
  }
  
  static MonoAssembly*
  probe_for_partial_name (const char *basepath, const char *fullname, MonoAssemblyName *aname, MonoImageOpenStatus *status)
  {
  	gchar *fullpath = NULL;
  	GDir *dirhandle;
  	const char* direntry;
  	MonoAssemblyName gac_aname;
  	gint major=-1, minor=0, build=0, revision=0;
  	gboolean exact_version;
  	
  	dirhandle = g_dir_open (basepath, 0, NULL);
  	if (!dirhandle)
  		return NULL;
  		
  	exact_version = (aname->major | aname->minor | aname->build | aname->revision) != 0;
  
  	while ((direntry = g_dir_read_name (dirhandle))) {
  		gboolean match = TRUE;
  		
  		if(!parse_assembly_directory_name (aname->name, direntry, &gac_aname))
  			continue;
  		
  		if (aname->culture != NULL && strcmp (aname->culture, gac_aname.culture) != 0)
  			match = FALSE;
  			
  		if (match && strlen ((char*)aname->public_key_token) > 0 && 
  				!mono_public_tokens_are_equal (aname->public_key_token, gac_aname.public_key_token))
  			match = FALSE;
  		
  		if (match) {
  			if (exact_version) {
  				match = (aname->major == gac_aname.major && aname->minor == gac_aname.minor &&
  						 aname->build == gac_aname.build && aname->revision == gac_aname.revision); 
  			}
  			else if (gac_aname.major < major)
  				match = FALSE;
  			else if (gac_aname.major == major) {
  				if (gac_aname.minor < minor)
  					match = FALSE;
  				else if (gac_aname.minor == minor) {
  					if (gac_aname.build < build)
  						match = FALSE;
  					else if (gac_aname.build == build && gac_aname.revision <= revision)
  						match = FALSE; 
  				}
  			}
  		}
  		
  		if (match) {
  			major = gac_aname.major;
  			minor = gac_aname.minor;
  			build = gac_aname.build;
  			revision = gac_aname.revision;
  			g_free (fullpath);
  			fullpath = g_build_path (G_DIR_SEPARATOR_S, basepath, direntry, fullname, NULL);
  		}
  
  		mono_assembly_name_free (&gac_aname);
  	}
  	
  	g_dir_close (dirhandle);
  	
  	if (fullpath == NULL)
  		return NULL;
  	else {
  		MonoAssembly *res = mono_assembly_open (fullpath, status);
  		g_free (fullpath);
  		return res;
  	}
  }
  
  MonoAssembly*
  mono_assembly_load_with_partial_name (const char *name, MonoImageOpenStatus *status)
  {
  	MonoAssembly *res;
  	MonoAssemblyName *aname, base_name;
  	MonoAssemblyName mapped_aname;
  	gchar *fullname, *gacpath;
  	gchar **paths;
  
  	memset (&base_name, 0, sizeof (MonoAssemblyName));
  	aname = &base_name;
  
  	if (!mono_assembly_name_parse (name, aname))
  		return NULL;
  
  	/* 
  	 * If no specific version has been requested, make sure we load the
  	 * correct version for system assemblies.
  	 */ 
  	if ((aname->major | aname->minor | aname->build | aname->revision) == 0)
  		aname = mono_assembly_remap_version (aname, &mapped_aname);
  	
  	res = mono_assembly_loaded (aname);
  	if (res) {
  		mono_assembly_name_free (aname);
  		return res;
  	}
  
  	res = invoke_assembly_preload_hook (aname, assemblies_path);
  	if (res) {
  		res->in_gac = FALSE;
  		mono_assembly_name_free (aname);
  		return res;
  	}
  
  	fullname = g_strdup_printf ("%s.dll", aname->name);
  
  	if (extra_gac_paths) {
  		paths = extra_gac_paths;
  		while (!res && *paths) {
  			gacpath = g_build_path (G_DIR_SEPARATOR_S, *paths, "lib", "mono", "gac", aname->name, NULL);
  			res = probe_for_partial_name (gacpath, fullname, aname, status);
  			g_free (gacpath);
  			paths++;
  		}
  	}
  
  	if (res) {
  		res->in_gac = TRUE;
  		g_free (fullname);
  		mono_assembly_name_free (aname);
  		return res;
  	}
  
  	gacpath = g_build_path (G_DIR_SEPARATOR_S, mono_assembly_getrootdir (), "mono", "gac", aname->name, NULL);
  	res = probe_for_partial_name (gacpath, fullname, aname, status);
  	g_free (gacpath);
  
  	if (res)
  		res->in_gac = TRUE;
  	else {
  		MonoDomain *domain = mono_domain_get ();
  		MonoReflectionAssembly *refasm = mono_try_assembly_resolve (domain, mono_string_new (domain, name), NULL, FALSE);
  		if (refasm)
  			res = refasm->assembly;
  	}
  	
  	g_free (fullname);
  	mono_assembly_name_free (aname);
  
  	return res;
  }
  
  static MonoBoolean
  mono_assembly_is_in_gac (const gchar *filename)
  {
  	const gchar *rootdir;
  	gchar *gp;
  	gchar **paths;
  
  	if (filename == NULL)
  		return FALSE;
  
  	for (paths = extra_gac_paths; paths && *paths; paths++) {
  		if (strstr (*paths, filename) != *paths)
  			continue;
  
  		gp = (gchar *) (filename + strlen (*paths));
  		if (*gp != G_DIR_SEPARATOR)
  			continue;
  		gp++;
  		if (strncmp (gp, "lib", 3))
  			continue;
  		gp += 3;
  		if (*gp != G_DIR_SEPARATOR)
  			continue;
  		gp++;
  		if (strncmp (gp, "mono", 4))
  			continue;
  		gp += 4;
  		if (*gp != G_DIR_SEPARATOR)
  			continue;
  		gp++;
  		if (strncmp (gp, "gac", 3))
  			continue;
  		gp += 3;
  		if (*gp != G_DIR_SEPARATOR)
  			continue;
  
  		return TRUE;
  	}
  
  	rootdir = mono_assembly_getrootdir ();
  	if (strstr (filename, rootdir) != filename)
  		return FALSE;
  
  	gp = (gchar *) (filename + strlen (rootdir));
  	if (*gp != G_DIR_SEPARATOR)
  		return FALSE;
  	gp++;
  	if (strncmp (gp, "mono", 4))
  		return FALSE;
  	gp += 4;
  	if (*gp != G_DIR_SEPARATOR)
  		return FALSE;
  	gp++;
  	if (strncmp (gp, "gac", 3))
  		return FALSE;
  	gp += 3;
  	if (*gp != G_DIR_SEPARATOR)
  		return FALSE;
  	return TRUE;
  }
  
  static MonoImage*
  mono_assembly_load_publisher_policy (MonoAssemblyName *aname)
  {
  	MonoImage *image;
  	gchar *filename, *pname, *name, *culture, *version, *fullpath, *subpath;
  	gchar **paths;
  	gint32 len;
  
  	if (strstr (aname->name, ".dll")) {
  		len = strlen (aname->name) - 4;
  		name = g_malloc (len);
  		strncpy (name, aname->name, len);
  	} else
  		name = g_strdup (aname->name);
  	
  	if (aname->culture)
  		culture = g_utf8_strdown (aname->culture, -1);
  	else
  		culture = g_strdup ("");
  	
  	pname = g_strdup_printf ("policy.%d.%d.%s", aname->major, aname->minor, name);
  	version = g_strdup_printf ("0.0.0.0_%s_%s", culture, aname->public_key_token);
  	g_free (name);
  	g_free (culture);
  	
  	filename = g_strconcat (pname, ".dll", NULL);
  	subpath = g_build_path (G_DIR_SEPARATOR_S, pname, version, filename, NULL);
  	g_free (pname);
  	g_free (version);
  	g_free (filename);
  
  	image = NULL;
  	if (extra_gac_paths) {
  		paths = extra_gac_paths;
  		while (!image && *paths) {
  			fullpath = g_build_path (G_DIR_SEPARATOR_S, *paths,
  					"lib", "mono", "gac", subpath, NULL);
  			image = mono_image_open (fullpath, NULL);
  			g_free (fullpath);
  			paths++;
  		}
  	}
  
  	if (image) {
  		g_free (subpath);
  		return image;
  	}
  
  	fullpath = g_build_path (G_DIR_SEPARATOR_S, mono_assembly_getrootdir (), 
  			"mono", "gac", subpath, NULL);
  	image = mono_image_open (fullpath, NULL);
  	g_free (subpath);
  	g_free (fullpath);
  	
  	return image;
  }
  
  static MonoAssemblyName*
  mono_assembly_bind_version (MonoAssemblyBindingInfo *info, MonoAssemblyName *aname, MonoAssemblyName *dest_name)
  {
  	memcpy (dest_name, aname, sizeof (MonoAssemblyName));
  	dest_name->major = info->new_version.major;
  	dest_name->minor = info->new_version.minor;
  	dest_name->build = info->new_version.build;
  	dest_name->revision = info->new_version.revision;
  	
  	return dest_name;
  }
  
  /* LOCKING: assembly_binding lock must be held */
  static MonoAssemblyBindingInfo*
  search_binding_loaded (MonoAssemblyName *aname)
  {
  	GSList *tmp;
  
  	for (tmp = loaded_assembly_bindings; tmp; tmp = tmp->next) {
  		MonoAssemblyBindingInfo *info = tmp->data;
  		if (assembly_binding_maps_name (info, aname))
  			return info;
  	}
  
  	return NULL;
  }
  
  static inline gboolean
  info_compare_versions (AssemblyVersionSet *left, AssemblyVersionSet *right)
  {
  	if (left->major != right->major || left->minor != right->minor ||
  	    left->build != right->build || left->revision != right->revision)
  		return FALSE;
  
  	return TRUE;
  }
  
  static inline gboolean
  info_versions_equal (MonoAssemblyBindingInfo *left, MonoAssemblyBindingInfo *right)
  {
  	if (left->has_old_version_bottom != right->has_old_version_bottom)
  		return FALSE;
  
  	if (left->has_old_version_top != right->has_old_version_top)
  		return FALSE;
  
  	if (left->has_new_version != right->has_new_version)
  		return FALSE;
  
  	if (left->has_old_version_bottom && !info_compare_versions (&left->old_version_bottom, &right->old_version_bottom))
  		return FALSE;
  
  	if (left->has_old_version_top && !info_compare_versions (&left->old_version_top, &right->old_version_top))
  		return FALSE;
  
  	if (left->has_new_version && !info_compare_versions (&left->new_version, &right->new_version))
  		return FALSE;
  
  	return TRUE;
  }
  
  /* LOCKING: assumes all the necessary locks are held */
  static void
  assembly_binding_info_parsed (MonoAssemblyBindingInfo *info, void *user_data)
  {
  	MonoAssemblyBindingInfo *info_copy;
  	GSList *tmp;
  	MonoAssemblyBindingInfo *info_tmp;
  	MonoDomain *domain = (MonoDomain*)user_data;
  
  	if (!domain)
  		return;
  
  	for (tmp = domain->assembly_bindings; tmp; tmp = tmp->next) {
  		info_tmp = tmp->data;
  		if (strcmp (info->name, info_tmp->name) == 0 && info_versions_equal (info, info_tmp))
  			return;
  	}
  
  	info_copy = mono_mempool_alloc0 (domain->mp, sizeof (MonoAssemblyBindingInfo));
  	memcpy (info_copy, info, sizeof (MonoAssemblyBindingInfo));
  	if (info->name)
  		info_copy->name = mono_mempool_strdup (domain->mp, info->name);
  	if (info->culture)
  		info_copy->culture = mono_mempool_strdup (domain->mp, info->culture);
  
  	domain->assembly_bindings = g_slist_append_mempool (domain->mp, domain->assembly_bindings, info_copy);
  }
  
  static int
  get_version_number (int major, int minor)
  {
  	return major * 256 + minor;
  }
  
  static inline gboolean
  info_major_minor_in_range (MonoAssemblyBindingInfo *info, MonoAssemblyName *aname)
  {
  	int aname_version_number = get_version_number (aname->major, aname->minor);
  	if (!info->has_old_version_bottom)
  		return FALSE;
  
  	if (get_version_number (info->old_version_bottom.major, info->old_version_bottom.minor) > aname_version_number)
  		return FALSE;
  
  	if (info->has_old_version_top && get_version_number (info->old_version_top.major, info->old_version_top.minor) < aname_version_number)
  		return FALSE;
  
  	/* This is not the nicest way to do it, but it's a by-product of the way parsing is done */
  	info->major = aname->major;
  	info->minor = aname->minor;
  
  	return TRUE;
  }
  
  /* LOCKING: Assumes that we are already locked - both loader and domain locks */
  static MonoAssemblyBindingInfo*
  get_per_domain_assembly_binding_info (MonoDomain *domain, MonoAssemblyName *aname)
  {
  	MonoAssemblyBindingInfo *info;
  	GSList *list;
  
  	if (!domain->assembly_bindings)
  		return NULL;
  
  	info = NULL;
  	for (list = domain->assembly_bindings; list; list = list->next) {
  		info = list->data;
  		if (info && !strcmp (aname->name, info->name) && info_major_minor_in_range (info, aname))
  			break;
  		info = NULL;
  	}
  
  	if (info) {
  		if (info->name && info->public_key_token [0] && info->has_old_version_bottom &&
  		    info->has_new_version && assembly_binding_maps_name (info, aname))
  			info->is_valid = TRUE;
  		else
  			info->is_valid = FALSE;
  	}
  
  	return info;
  }
  
  static MonoAssemblyName*
  mono_assembly_apply_binding (MonoAssemblyName *aname, MonoAssemblyName *dest_name)
  {
  	MonoAssemblyBindingInfo *info, *info2;
  	MonoImage *ppimage;
  	MonoDomain *domain;
  
  	if (aname->public_key_token [0] == 0)
  		return aname;
  
  	domain = mono_domain_get ();
  
  	mono_assembly_binding_lock ();
  	info = search_binding_loaded (aname);
  	mono_assembly_binding_unlock ();
  
  	if (!info) {
  		mono_domain_lock (domain);
  		info = get_per_domain_assembly_binding_info (domain, aname);
  		mono_domain_unlock (domain);
  	}
  
  	if (info) {
  		if (!check_policy_versions (info, aname))
  			return aname;
  		
  		mono_assembly_bind_version (info, aname, dest_name);
  		return dest_name;
  	}
  
  	if (domain && domain->setup && domain->setup->configuration_file) {
  		mono_domain_lock (domain);
  		if (!domain->assembly_bindings_parsed) {
  			gchar *domain_config_file_name = mono_string_to_utf8 (domain->setup->configuration_file);
  			gchar *domain_config_file_path = mono_portability_find_file (domain_config_file_name, TRUE);
  
  			if (!domain_config_file_path)
  				domain_config_file_path = domain_config_file_name;
  			
  			mono_config_parse_assembly_bindings (domain_config_file_path, aname->major, aname->minor, domain, assembly_binding_info_parsed);
  			domain->assembly_bindings_parsed = TRUE;
  			if (domain_config_file_name != domain_config_file_path)
  				g_free (domain_config_file_name);
  			g_free (domain_config_file_path);
  		}
  
  		info2 = get_per_domain_assembly_binding_info (domain, aname);
  
  		if (info2) {
  			info = g_memdup (info2, sizeof (MonoAssemblyBindingInfo));
  			info->name = g_strdup (info2->name);
  			info->culture = g_strdup (info2->culture);
  			info->domain_id = domain->domain_id;
  		}
  
  		mono_domain_unlock (domain);
  	}
  
  	if (!info) {
  		info = g_new0 (MonoAssemblyBindingInfo, 1);
  		info->major = aname->major;
  		info->minor = aname->minor;
  	}
  
  	if (!info->is_valid) {
  		ppimage = mono_assembly_load_publisher_policy (aname);
  		if (ppimage) {
  			get_publisher_policy_info (ppimage, aname, info);
  			mono_image_close (ppimage);
  		}
  	}
  
  	/* Define default error value if needed */
  	if (!info->is_valid) {
  		info->name = g_strdup (aname->name);
  		info->culture = g_strdup (aname->culture);
  		g_strlcpy ((char *)info->public_key_token, (const char *)aname->public_key_token, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  	}
  	
  	mono_assembly_binding_lock ();
  	info2 = search_binding_loaded (aname);
  	if (info2) {
  		/* This binding was added by another thread 
  		 * before us */
  		mono_assembly_binding_info_free (info);
  		g_free (info);
  		
  		info = info2;
  	} else
  		loaded_assembly_bindings = g_slist_prepend (loaded_assembly_bindings, info);
  		
  	mono_assembly_binding_unlock ();
  	
  	if (!info->is_valid || !check_policy_versions (info, aname))
  		return aname;
  
  	mono_assembly_bind_version (info, aname, dest_name);
  	return dest_name;
  }
  
  /**
   * mono_assembly_load_from_gac
   *
   * @aname: The assembly name object
   */
  static MonoAssembly*
  mono_assembly_load_from_gac (MonoAssemblyName *aname,  gchar *filename, MonoImageOpenStatus *status, MonoBoolean refonly)
  {
  	MonoAssembly *result = NULL;
  	gchar *name, *version, *culture, *fullpath, *subpath;
  	gint32 len;
  	gchar **paths;
  	char *pubtok;
  
  	if (aname->public_key_token [0] == 0) {
  		return NULL;
  	}
  
  	if (strstr (aname->name, ".dll")) {
  		len = strlen (filename) - 4;
  		name = g_malloc (len);
  		strncpy (name, aname->name, len);
  	} else {
  		name = g_strdup (aname->name);
  	}
  
  	if (aname->culture) {
  		culture = g_utf8_strdown (aname->culture, -1);
  	} else {
  		culture = g_strdup ("");
  	}
  
  	pubtok = g_ascii_strdown ((char*)aname->public_key_token, MONO_PUBLIC_KEY_TOKEN_LENGTH);
  	version = g_strdup_printf ("%d.%d.%d.%d_%s_%s", aname->major,
  			aname->minor, aname->build, aname->revision,
  			culture, pubtok);
  	g_free (pubtok);
  	
  	subpath = g_build_path (G_DIR_SEPARATOR_S, name, version, filename, NULL);
  	g_free (name);
  	g_free (version);
  	g_free (culture);
  
  	if (extra_gac_paths) {
  		paths = extra_gac_paths;
  		while (!result && *paths) {
  			fullpath = g_build_path (G_DIR_SEPARATOR_S, *paths, "lib", "mono", "gac", subpath, NULL);
  			result = mono_assembly_open_full (fullpath, status, refonly);
  			g_free (fullpath);
  			paths++;
  		}
  	}
  
  	if (result) {
  		result->in_gac = TRUE;
  		g_free (subpath);
  		return result;
  	}
  
  	fullpath = g_build_path (G_DIR_SEPARATOR_S, mono_assembly_getrootdir (),
  			"mono", "gac", subpath, NULL);
  	result = mono_assembly_open_full (fullpath, status, refonly);
  	g_free (fullpath);
  
  	if (result)
  		result->in_gac = TRUE;
  	
  	g_free (subpath);
  
  	return result;
  }
  
  MonoAssembly*
  mono_assembly_load_corlib (const MonoRuntimeInfo *runtime, MonoImageOpenStatus *status)
  {
  	char *corlib_file;
  	MonoAssemblyName *aname;
  
  	if (corlib) {
  		/* g_print ("corlib already loaded\n"); */
  		return corlib;
  	}
  
  #if defined(__native_client__)
  	if (corlibData != NULL && corlibSize != 0) {
  		int status = 0;
  		/* First "FALSE" instructs mono not to make a copy. */
  		/* Second "FALSE" says this is not just a ref.      */
  		MonoImage* image = mono_image_open_from_data_full (corlibData, corlibSize, FALSE, &status, FALSE);
  		if (image == NULL || status != 0)
  			g_print("mono_image_open_from_data_full failed: %d\n", status);
  		corlib = mono_assembly_load_from_full (image, "mscorlib", &status, FALSE);
  		if (corlib == NULL || status != 0)
  			g_print ("mono_assembly_load_from_full failed: %d\n", status);
  		if (corlib)
  			return corlib;
  	}
  #endif
  
  	aname = mono_assembly_name_new ("mscorlib.dll");
  	corlib = invoke_assembly_preload_hook (aname, assemblies_path);
  	mono_assembly_name_free (aname);
  	g_free (aname);
  	if (corlib != NULL)
  		return corlib;
  
  	if (assemblies_path) {
  		corlib = load_in_path ("mscorlib.dll", (const char**)assemblies_path, status, FALSE);
  		if (corlib)
  			return corlib;
  	}
  
  	/* Load corlib from mono/<version> */
  	
  	corlib_file = g_build_filename ("mono", runtime->framework_version, "mscorlib.dll", NULL);
  	if (assemblies_path) {
  		corlib = load_in_path (corlib_file, (const char**)assemblies_path, status, FALSE);
  		if (corlib) {
  			g_free (corlib_file);
  			return corlib;
  		}
  	}
  	corlib = load_in_path (corlib_file, default_path, status, FALSE);
  	g_free (corlib_file);
  	
  	if (corlib && !strcmp (runtime->framework_version, "4.5"))
  		default_path [1] = g_strdup_printf ("%s/mono/4.5/Facades", default_path [0]);
  		
  	return corlib;
  }
  
  MonoAssembly*
  mono_assembly_load_full_nosearch (MonoAssemblyName *aname, 
  								  const char       *basedir, 
  								  MonoImageOpenStatus *status,
  								  gboolean refonly)
  {
  	MonoAssembly *result;
  	char *fullpath, *filename;
  	MonoAssemblyName maped_aname;
  	MonoAssemblyName maped_name_pp;
  	int ext_index;
  	const char *ext;
  	int len;
  
  	aname = mono_assembly_remap_version (aname, &maped_aname);
  	
  	/* Reflection only assemblies don't get assembly binding */
  	if (!refonly)
  		aname = mono_assembly_apply_binding (aname, &maped_name_pp);
  	
  	result = mono_assembly_loaded_full (aname, refonly);
  	if (result)
  		return result;
  
  	result = refonly ? invoke_assembly_refonly_preload_hook (aname, assemblies_path) : invoke_assembly_preload_hook (aname, assemblies_path);
  	if (result) {
  		result->in_gac = FALSE;
  		return result;
  	}
  
  	/* Currently we retrieve the loaded corlib for reflection 
  	 * only requests, like a common reflection only assembly 
  	 */
  	if (strcmp (aname->name, "mscorlib") == 0 || strcmp (aname->name, "mscorlib.dll") == 0) {
  		return mono_assembly_load_corlib (mono_get_runtime_info (), status);
  	}
  
  	len = strlen (aname->name);
  	for (ext_index = 0; ext_index < 2; ext_index ++) {
  		ext = ext_index == 0 ? ".dll" : ".exe";
  		if (len > 4 && (!strcmp (aname->name + len - 4, ".dll") || !strcmp (aname->name + len - 4, ".exe"))) {
  			filename = g_strdup (aname->name);
  			/* Don't try appending .dll/.exe if it already has one of those extensions */
  			ext_index++;
  		} else {
  			filename = g_strconcat (aname->name, ext, NULL);
  		}
  
  		result = mono_assembly_load_from_gac (aname, filename, status, refonly);
  		if (result) {
  			g_free (filename);
  			return result;
  		}
  
  		if (basedir) {
  			fullpath = g_build_filename (basedir, filename, NULL);
  			result = mono_assembly_open_full (fullpath, status, refonly);
  			g_free (fullpath);
  			if (result) {
  				result->in_gac = FALSE;
  				g_free (filename);
  				return result;
  			}
  		}
  
  		result = load_in_path (filename, default_path, status, refonly);
  		if (result)
  			result->in_gac = FALSE;
  		g_free (filename);
  		if (result)
  			return result;
  	}
  
  	return result;
  }
  
  MonoAssembly*
  mono_assembly_load_full_internal (MonoAssemblyName *aname, MonoAssembly *requesting, const char *basedir, MonoImageOpenStatus *status, gboolean refonly)
  {
  	MonoAssembly *result = mono_assembly_load_full_nosearch (aname, basedir, status, refonly);
  
  	if (!result)
  		/* Try a postload search hook */
  		result = mono_assembly_invoke_search_hook_internal (aname, requesting, refonly, TRUE);
  	return result;
  }
  
  /**
   * mono_assembly_load_full:
   * @aname: A MonoAssemblyName with the assembly name to load.
   * @basedir: A directory to look up the assembly at.
   * @status: a pointer to a MonoImageOpenStatus to return the status of the load operation
   * @refonly: Whether this assembly is being opened in "reflection-only" mode.
   *
   * Loads the assembly referenced by @aname, if the value of @basedir is not NULL, it
   * attempts to load the assembly from that directory before probing the standard locations.
   *
   * If the assembly is being opened in reflection-only mode (@refonly set to TRUE) then no 
   * assembly binding takes place.
   *
   * Returns: the assembly referenced by @aname loaded or NULL on error.   On error the
   * value pointed by status is updated with an error code.
   */
  MonoAssembly*
  mono_assembly_load_full (MonoAssemblyName *aname, const char *basedir, MonoImageOpenStatus *status, gboolean refonly)
  {
  	return mono_assembly_load_full_internal (aname, NULL, basedir, status, refonly);
  }
  
  /**
   * mono_assembly_load:
   * @aname: A MonoAssemblyName with the assembly name to load.
   * @basedir: A directory to look up the assembly at.
   * @status: a pointer to a MonoImageOpenStatus to return the status of the load operation
   *
   * Loads the assembly referenced by @aname, if the value of @basedir is not NULL, it
   * attempts to load the assembly from that directory before probing the standard locations.
   *
   * Returns: the assembly referenced by @aname loaded or NULL on error.   On error the
   * value pointed by status is updated with an error code.
   */
  MonoAssembly*
  mono_assembly_load (MonoAssemblyName *aname, const char *basedir, MonoImageOpenStatus *status)
  {
  	return mono_assembly_load_full_internal (aname, NULL, basedir, status, FALSE);
  }
  
  MonoAssembly*
  mono_assembly_loaded_full (MonoAssemblyName *aname, gboolean refonly)
  {
  	MonoAssembly *res;
  	MonoAssemblyName maped_aname;
  
  	aname = mono_assembly_remap_version (aname, &maped_aname);
  
  	res = mono_assembly_invoke_search_hook_internal (aname, NULL, refonly, FALSE);
  
  	return res;
  }
  
  /**
   * mono_assembly_loaded:
   * @aname: an assembly to look for.
   *
   * Returns: NULL If the given @aname assembly has not been loaded, or a pointer to
   * a MonoAssembly that matches the MonoAssemblyName specified.
   */
  MonoAssembly*
  mono_assembly_loaded (MonoAssemblyName *aname)
  {
  	return mono_assembly_loaded_full (aname, FALSE);
  }
  
  void
  mono_assembly_release_gc_roots (MonoAssembly *assembly)
  {
  	if (assembly == NULL || assembly == REFERENCE_MISSING)
  		return;
  
  	if (assembly_is_dynamic (assembly)) {
  		int i;
  		MonoDynamicImage *dynimg = (MonoDynamicImage *)assembly->image;
  		for (i = 0; i < dynimg->image.module_count; ++i)
  			mono_dynamic_image_release_gc_roots ((MonoDynamicImage *)dynimg->image.modules [i]);
  		mono_dynamic_image_release_gc_roots (dynimg);
  	}
  }
  
  /*
   * Returns whether mono_assembly_close_finish() must be called as
   * well.  See comment for mono_image_close_except_pools() for why we
   * unload in two steps.
   */
  gboolean
  mono_assembly_close_except_image_pools (MonoAssembly *assembly)
  {
  	GSList *tmp;
  	g_return_val_if_fail (assembly != NULL, FALSE);
  
  	if (assembly == REFERENCE_MISSING)
  		return FALSE;
  
  	/* Might be 0 already */
  	if (InterlockedDecrement (&assembly->ref_count) > 0)
  		return FALSE;
  
  	mono_profiler_assembly_event (assembly, MONO_PROFILE_START_UNLOAD);
  
  	mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Unloading assembly %s [%p].", assembly->aname.name, assembly);
  
  	mono_debug_close_image (assembly->image);
  
  	mono_assemblies_lock ();
  	loaded_assemblies = g_list_remove (loaded_assemblies, assembly);
  	mono_assemblies_unlock ();
  
  	assembly->image->assembly = NULL;
  
  	if (!mono_image_close_except_pools (assembly->image))
  		assembly->image = NULL;
  
  	for (tmp = assembly->friend_assembly_names; tmp; tmp = tmp->next) {
  		MonoAssemblyName *fname = tmp->data;
  		mono_assembly_name_free (fname);
  		g_free (fname);
  	}
  	g_slist_free (assembly->friend_assembly_names);
  	g_free (assembly->basedir);
  
  	mono_profiler_assembly_event (assembly, MONO_PROFILE_END_UNLOAD);
  
  	return TRUE;
  }
  
  void
  mono_assembly_close_finish (MonoAssembly *assembly)
  {
  	g_assert (assembly && assembly != REFERENCE_MISSING);
  
  	if (assembly->image)
  		mono_image_close_finish (assembly->image);
  
  	if (assembly_is_dynamic (assembly)) {
  		g_free ((char*)assembly->aname.culture);
  	} else {
  		g_free (assembly);
  	}
  }
  
  /**
   * mono_assembly_close:
   * @assembly: the assembly to release.
   *
   * This method releases a reference to the @assembly.  The assembly is
   * only released when all the outstanding references to it are released.
   */
  void
  mono_assembly_close (MonoAssembly *assembly)
  {
  	if (mono_assembly_close_except_image_pools (assembly))
  		mono_assembly_close_finish (assembly);
  }
  
  MonoImage*
  mono_assembly_load_module (MonoAssembly *assembly, guint32 idx)
  {
  	return mono_image_load_file_for_image (assembly->image, idx);
  }
  
  void
  mono_assembly_foreach (GFunc func, gpointer user_data)
  {
  	GList *copy;
  
  	/*
  	 * We make a copy of the list to avoid calling the callback inside the 
  	 * lock, which could lead to deadlocks.
  	 */
  	mono_assemblies_lock ();
  	copy = g_list_copy (loaded_assemblies);
  	mono_assemblies_unlock ();
  
  	g_list_foreach (loaded_assemblies, func, user_data);
  
  	g_list_free (copy);
  }
  
  /**
   * mono_assemblies_cleanup:
   *
   * Free all resources used by this module.
   */
  void
  mono_assemblies_cleanup (void)
  {
  	GSList *l;
  
  	mono_mutex_destroy (&assemblies_mutex);
  	mono_mutex_destroy (&assembly_binding_mutex);
  
  	for (l = loaded_assembly_bindings; l; l = l->next) {
  		MonoAssemblyBindingInfo *info = l->data;
  
  		mono_assembly_binding_info_free (info);
  		g_free (info);
  	}
  	g_slist_free (loaded_assembly_bindings);
  
  	free_assembly_load_hooks ();
  	free_assembly_search_hooks ();
  	free_assembly_preload_hooks ();
  }
  
  /*LOCKING takes the assembly_binding lock*/
  void
  mono_assembly_cleanup_domain_bindings (guint32 domain_id)
  {
  	GSList **iter;
  
  	mono_assembly_binding_lock ();
  	iter = &loaded_assembly_bindings;
  	while (*iter) {
  		GSList *l = *iter;
  		MonoAssemblyBindingInfo *info = l->data;
  
  		if (info->domain_id == domain_id) {
  			*iter = l->next;
  			mono_assembly_binding_info_free (info);
  			g_free (info);
  			g_slist_free_1 (l);
  		} else {
  			iter = &l->next;
  		}
  	}
  	mono_assembly_binding_unlock ();
  }
  
  /*
   * Holds the assembly of the application, for
   * System.Diagnostics.Process::MainModule
   */
  static MonoAssembly *main_assembly=NULL;
  
  void
  mono_assembly_set_main (MonoAssembly *assembly)
  {
  	main_assembly = assembly;
  }
  
  /**
   * mono_assembly_get_main:
   *
   * Returns: the assembly for the application, the first assembly that is loaded by the VM
   */
  MonoAssembly *
  mono_assembly_get_main (void)
  {
  	return (main_assembly);
  }
  
  /**
   * mono_assembly_get_image:
   * @assembly: The assembly to retrieve the image from
   *
   * Returns: the MonoImage associated with this assembly.
   */
  MonoImage*
  mono_assembly_get_image (MonoAssembly *assembly)
  {
  	return assembly->image;
  }
  
  void
  mono_register_bundled_assemblies (const MonoBundledAssembly **assemblies)
  {
  	bundles = assemblies;
  }
  
  #define MONO_DECLSEC_FORMAT_10		0x3C
  #define MONO_DECLSEC_FORMAT_20		0x2E
  #define MONO_DECLSEC_FIELD		0x53
  #define MONO_DECLSEC_PROPERTY		0x54
  
  #define SKIP_VISIBILITY_XML_ATTRIBUTE ("\"SkipVerification\"")
  #define SKIP_VISIBILITY_ATTRIBUTE_NAME ("System.Security.Permissions.SecurityPermissionAttribute")
  #define SKIP_VISIBILITY_ATTRIBUTE_SIZE (sizeof (SKIP_VISIBILITY_ATTRIBUTE_NAME) - 1)
  #define SKIP_VISIBILITY_PROPERTY_NAME ("SkipVerification")
  #define SKIP_VISIBILITY_PROPERTY_SIZE (sizeof (SKIP_VISIBILITY_PROPERTY_NAME) - 1)
  
  static gboolean
  mono_assembly_try_decode_skip_verification_param (const char *p, const char **resp, gboolean *abort_decoding)
  {
  	int len;
  	switch (*p++) {
  	case MONO_DECLSEC_PROPERTY:
  		break;
  	case MONO_DECLSEC_FIELD:
  	default:
  		*abort_decoding = TRUE;
  		return FALSE;
  		break;
  	}
  
  	if (*p++ != MONO_TYPE_BOOLEAN) {
  		*abort_decoding = TRUE;
  		return FALSE;
  	}
  		
  	/* property name length */
  	len = mono_metadata_decode_value (p, &p);
  
  	if (len >= SKIP_VISIBILITY_PROPERTY_SIZE && !memcmp (p, SKIP_VISIBILITY_PROPERTY_NAME, SKIP_VISIBILITY_PROPERTY_SIZE)) {
  		p += len;
  		return *p;
  	}
  	p += len + 1;
  
  	*resp = p;
  	return FALSE;
  }
  
  static gboolean
  mono_assembly_try_decode_skip_verification (const char *p, const char *endn)
  {
  	int i, j, num, len, params_len;
  
  	if (*p == MONO_DECLSEC_FORMAT_10) {
  		gsize read, written;
  		char *res = g_convert (p, endn - p, "UTF-8", "UTF-16LE", &read, &written, NULL);
  		if (res) {
  			gboolean found = strstr (res, SKIP_VISIBILITY_XML_ATTRIBUTE) != NULL;
  			g_free (res);
  			return found;
  		}
  		return FALSE;
  	}
  	if (*p++ != MONO_DECLSEC_FORMAT_20)
  		return FALSE;
  
  	/* number of encoded permission attributes */
  	num = mono_metadata_decode_value (p, &p);
  	for (i = 0; i < num; ++i) {
  		gboolean is_valid = FALSE;
  		gboolean abort_decoding = FALSE;
  
  		/* attribute name length */
  		len =  mono_metadata_decode_value (p, &p);
  
  		/* We don't really need to fully decode the type. Comparing the name is enough */
  		is_valid = len >= SKIP_VISIBILITY_ATTRIBUTE_SIZE && !memcmp (p, SKIP_VISIBILITY_ATTRIBUTE_NAME, SKIP_VISIBILITY_ATTRIBUTE_SIZE);
  
  		p += len;
  
  		/*size of the params table*/
  		params_len =  mono_metadata_decode_value (p, &p);
  		if (is_valid) {
  			const char *params_end = p + params_len;
  			
  			/* number of parameters */
  			len = mono_metadata_decode_value (p, &p);
  	
  			for (j = 0; j < len; ++j) {
  				if (mono_assembly_try_decode_skip_verification_param (p, &p, &abort_decoding))
  					return TRUE;
  				if (abort_decoding)
  					break;
  			}
  			p = params_end;
  		} else {
  			p += params_len;
  		}
  	}
  	
  	return FALSE;
  }
  
  
  gboolean
  mono_assembly_has_skip_verification (MonoAssembly *assembly)
  {
  	MonoTableInfo *t;	
  	guint32 cols [MONO_DECL_SECURITY_SIZE];
  	const char *blob;
  	int i, len;
  
  	if (MONO_SECMAN_FLAG_INIT (assembly->skipverification))
  		return MONO_SECMAN_FLAG_GET_VALUE (assembly->skipverification);
  
  	t = &assembly->image->tables [MONO_TABLE_DECLSECURITY];
  
  	for (i = 0; i < t->rows; ++i) {
  		mono_metadata_decode_row (t, i, cols, MONO_DECL_SECURITY_SIZE);
  		if ((cols [MONO_DECL_SECURITY_PARENT] & MONO_HAS_DECL_SECURITY_MASK) != MONO_HAS_DECL_SECURITY_ASSEMBLY)
  			continue;
  		if (cols [MONO_DECL_SECURITY_ACTION] != SECURITY_ACTION_REQMIN)
  			continue;
  
  		blob = mono_metadata_blob_heap (assembly->image, cols [MONO_DECL_SECURITY_PERMISSIONSET]);
  		len = mono_metadata_decode_blob_size (blob, &blob);
  		if (!len)
  			continue;
  
  		if (mono_assembly_try_decode_skip_verification (blob, blob + len)) {
  			MONO_SECMAN_FLAG_SET_VALUE (assembly->skipverification, TRUE);
  			return TRUE;
  		}
  	}
  
  	MONO_SECMAN_FLAG_SET_VALUE (assembly->skipverification, FALSE);
  	return FALSE;
  }
  