text: // i386.cc -- i386 target support for gold.
  
  // Copyright (C) 2006-2014 Free Software Foundation, Inc.
  // Written by Ian Lance Taylor <iant@google.com>.
  
  // This file is part of gold.
  
  // This program is free software; you can redistribute it and/or modify
  // it under the terms of the GNU General Public License as published by
  // the Free Software Foundation; either version 3 of the License, or
  // (at your option) any later version.
  
  // This program is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU General Public License for more details.
  
  // You should have received a copy of the GNU General Public License
  // along with this program; if not, write to the Free Software
  // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  // MA 02110-1301, USA.
  
  #include "gold.h"
  
  #include <cstring>
  
  #include "elfcpp.h"
  #include "dwarf.h"
  #include "parameters.h"
  #include "reloc.h"
  #include "i386.h"
  #include "object.h"
  #include "symtab.h"
  #include "layout.h"
  #include "output.h"
  #include "copy-relocs.h"
  #include "target.h"
  #include "target-reloc.h"
  #include "target-select.h"
  #include "tls.h"
  #include "freebsd.h"
  #include "nacl.h"
  #include "gc.h"
  
  namespace
  {
  
  using namespace gold;
  
  // A class to handle the .got.plt section.
  
  class Output_data_got_plt_i386 : public Output_section_data_build
  {
   public:
    Output_data_got_plt_i386(Layout* layout)
      : Output_section_data_build(4),
        layout_(layout)
    { }
  
   protected:
    // Write out the PLT data.
    void
    do_write(Output_file*);
  
    // Write to a map file.
    void
    do_print_to_mapfile(Mapfile* mapfile) const
    { mapfile->print_output_data(this, "** GOT PLT"); }
  
   private:
    // A pointer to the Layout class, so that we can find the .dynamic
    // section when we write out the GOT PLT section.
    Layout* layout_;
  };
  
  // A class to handle the PLT data.
  // This is an abstract base class that handles most of the linker details
  // but does not know the actual contents of PLT entries.  The derived
  // classes below fill in those details.
  
  class Output_data_plt_i386 : public Output_section_data
  {
   public:
    typedef Output_data_reloc<elfcpp::SHT_REL, true, 32, false> Reloc_section;
  
    Output_data_plt_i386(Layout*, uint64_t addralign,
  		       Output_data_got_plt_i386*, Output_data_space*);
  
    // Add an entry to the PLT.
    void
    add_entry(Symbol_table*, Layout*, Symbol* gsym);
  
    // Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
    unsigned int
    add_local_ifunc_entry(Symbol_table*, Layout*,
  			Sized_relobj_file<32, false>* relobj,
  			unsigned int local_sym_index);
  
    // Return the .rel.plt section data.
    Reloc_section*
    rel_plt() const
    { return this->rel_; }
  
    // Return where the TLS_DESC relocations should go.
    Reloc_section*
    rel_tls_desc(Layout*);
  
    // Return where the IRELATIVE relocations should go.
    Reloc_section*
    rel_irelative(Symbol_table*, Layout*);
  
    // Return whether we created a section for IRELATIVE relocations.
    bool
    has_irelative_section() const
    { return this->irelative_rel_ != NULL; }
  
    // Return the number of PLT entries.
    unsigned int
    entry_count() const
    { return this->count_ + this->irelative_count_; }
  
    // Return the offset of the first non-reserved PLT entry.
    unsigned int
    first_plt_entry_offset()
    { return this->get_plt_entry_size(); }
  
    // Return the size of a PLT entry.
    unsigned int
    get_plt_entry_size() const
    { return this->do_get_plt_entry_size(); }
  
    // Return the PLT address to use for a global symbol.
    uint64_t
    address_for_global(const Symbol*);
  
    // Return the PLT address to use for a local symbol.
    uint64_t
    address_for_local(const Relobj*, unsigned int symndx);
  
    // Add .eh_frame information for the PLT.
    void
    add_eh_frame(Layout* layout)
    { this->do_add_eh_frame(layout); }
  
   protected:
    // Fill the first PLT entry, given the pointer to the PLT section data
    // and the runtime address of the GOT.
    void
    fill_first_plt_entry(unsigned char* pov,
  		       elfcpp::Elf_types<32>::Elf_Addr got_address)
    { this->do_fill_first_plt_entry(pov, got_address); }
  
    // Fill a normal PLT entry, given the pointer to the entry's data in the
    // section, the runtime address of the GOT, the offset into the GOT of
    // the corresponding slot, the offset into the relocation section of the
    // corresponding reloc, and the offset of this entry within the whole
    // PLT.  Return the offset from this PLT entry's runtime address that
    // should be used to compute the initial value of the GOT slot.
    unsigned int
    fill_plt_entry(unsigned char* pov,
  		 elfcpp::Elf_types<32>::Elf_Addr got_address,
  		 unsigned int got_offset,
  		 unsigned int plt_offset,
  		 unsigned int plt_rel_offset)
    {
      return this->do_fill_plt_entry(pov, got_address, got_offset,
  				   plt_offset, plt_rel_offset);
    }
  
    virtual unsigned int
    do_get_plt_entry_size() const = 0;
  
    virtual void
    do_fill_first_plt_entry(unsigned char* pov,
  			  elfcpp::Elf_types<32>::Elf_Addr got_address) = 0;
  
    virtual unsigned int
    do_fill_plt_entry(unsigned char* pov,
  		    elfcpp::Elf_types<32>::Elf_Addr got_address,
  		    unsigned int got_offset,
  		    unsigned int plt_offset,
  		    unsigned int plt_rel_offset) = 0;
  
    virtual void
    do_add_eh_frame(Layout*) = 0;
  
    void
    do_adjust_output_section(Output_section* os);
  
    // Write to a map file.
    void
    do_print_to_mapfile(Mapfile* mapfile) const
    { mapfile->print_output_data(this, _("** PLT")); }
  
    // The .eh_frame unwind information for the PLT.
    // The CIE is common across variants of the PLT format.
    static const int plt_eh_frame_cie_size = 16;
    static const unsigned char plt_eh_frame_cie[plt_eh_frame_cie_size];
  
   private:
    // Set the final size.
    void
    set_final_data_size()
    {
      this->set_data_size((this->count_ + this->irelative_count_ + 1)
  			* this->get_plt_entry_size());
    }
  
    // Write out the PLT data.
    void
    do_write(Output_file*);
  
    // We keep a list of global STT_GNU_IFUNC symbols, each with its
    // offset in the GOT.
    struct Global_ifunc
    {
      Symbol* sym;
      unsigned int got_offset;
    };
  
    // We keep a list of local STT_GNU_IFUNC symbols, each with its
    // offset in the GOT.
    struct Local_ifunc
    {
      Sized_relobj_file<32, false>* object;
      unsigned int local_sym_index;
      unsigned int got_offset;
    };
  
    // The reloc section.
    Reloc_section* rel_;
    // The TLS_DESC relocations, if necessary.  These must follow the
    // regular PLT relocs.
    Reloc_section* tls_desc_rel_;
    // The IRELATIVE relocations, if necessary.  These must follow the
    // regular relocatoins and the TLS_DESC relocations.
    Reloc_section* irelative_rel_;
    // The .got.plt section.
    Output_data_got_plt_i386* got_plt_;
    // The part of the .got.plt section used for IRELATIVE relocs.
    Output_data_space* got_irelative_;
    // The number of PLT entries.
    unsigned int count_;
    // Number of PLT entries with R_386_IRELATIVE relocs.  These follow
    // the regular PLT entries.
    unsigned int irelative_count_;
    // Global STT_GNU_IFUNC symbols.
    std::vector<Global_ifunc> global_ifuncs_;
    // Local STT_GNU_IFUNC symbols.
    std::vector<Local_ifunc> local_ifuncs_;
  };
  
  // This is an abstract class for the standard PLT layout.
  // The derived classes below handle the actual PLT contents
  // for the executable (non-PIC) and shared-library (PIC) cases.
  // The unwind information is uniform across those two, so it's here.
  
  class Output_data_plt_i386_standard : public Output_data_plt_i386
  {
   public:
    Output_data_plt_i386_standard(Layout* layout,
  				Output_data_got_plt_i386* got_plt,
  				Output_data_space* got_irelative)
      : Output_data_plt_i386(layout, plt_entry_size, got_plt, got_irelative)
    { }
  
   protected:
    virtual unsigned int
    do_get_plt_entry_size() const
    { return plt_entry_size; }
  
    virtual void
    do_add_eh_frame(Layout* layout)
    {
      layout->add_eh_frame_for_plt(this, plt_eh_frame_cie, plt_eh_frame_cie_size,
  				 plt_eh_frame_fde, plt_eh_frame_fde_size);
    }
  
    // The size of an entry in the PLT.
    static const int plt_entry_size = 16;
  
    // The .eh_frame unwind information for the PLT.
    static const int plt_eh_frame_fde_size = 32;
    static const unsigned char plt_eh_frame_fde[plt_eh_frame_fde_size];
  };
  
  // Actually fill the PLT contents for an executable (non-PIC).
  
  class Output_data_plt_i386_exec : public Output_data_plt_i386_standard
  {
  public:
    Output_data_plt_i386_exec(Layout* layout,
  			    Output_data_got_plt_i386* got_plt,
  			    Output_data_space* got_irelative)
      : Output_data_plt_i386_standard(layout, got_plt, got_irelative)
    { }
  
   protected:
    virtual void
    do_fill_first_plt_entry(unsigned char* pov,
  			  elfcpp::Elf_types<32>::Elf_Addr got_address);
  
    virtual unsigned int
    do_fill_plt_entry(unsigned char* pov,
  		    elfcpp::Elf_types<32>::Elf_Addr got_address,
  		    unsigned int got_offset,
  		    unsigned int plt_offset,
  		    unsigned int plt_rel_offset);
  
   private:
    // The first entry in the PLT for an executable.
    static const unsigned char first_plt_entry[plt_entry_size];
  
    // Other entries in the PLT for an executable.
    static const unsigned char plt_entry[plt_entry_size];
  };
  
  // Actually fill the PLT contents for a shared library (PIC).
  
  class Output_data_plt_i386_dyn : public Output_data_plt_i386_standard
  {
   public:
    Output_data_plt_i386_dyn(Layout* layout,
  			   Output_data_got_plt_i386* got_plt,
  			   Output_data_space* got_irelative)
      : Output_data_plt_i386_standard(layout, got_plt, got_irelative)
    { }
  
   protected:
    virtual void
    do_fill_first_plt_entry(unsigned char* pov, elfcpp::Elf_types<32>::Elf_Addr);
  
    virtual unsigned int
    do_fill_plt_entry(unsigned char* pov,
  		    elfcpp::Elf_types<32>::Elf_Addr,
  		    unsigned int got_offset,
  		    unsigned int plt_offset,
  		    unsigned int plt_rel_offset);
  
   private:
    // The first entry in the PLT for a shared object.
    static const unsigned char first_plt_entry[plt_entry_size];
  
    // Other entries in the PLT for a shared object.
    static const unsigned char plt_entry[plt_entry_size];
  };
  
  // The i386 target class.
  // TLS info comes from
  //   http://people.redhat.com/drepper/tls.pdf
  //   http://www.lsd.ic.unicamp.br/~oliva/writeups/TLS/RFC-TLSDESC-x86.txt
  
  class Target_i386 : public Sized_target<32, false>
  {
   public:
    typedef Output_data_reloc<elfcpp::SHT_REL, true, 32, false> Reloc_section;
  
    Target_i386(const Target::Target_info* info = &i386_info)
      : Sized_target<32, false>(info),
        got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL),
        got_tlsdesc_(NULL), global_offset_table_(NULL), rel_dyn_(NULL),
        rel_irelative_(NULL), copy_relocs_(elfcpp::R_386_COPY),
        got_mod_index_offset_(-1U), tls_base_symbol_defined_(false)
    { }
  
    // Process the relocations to determine unreferenced sections for
    // garbage collection.
    void
    gc_process_relocs(Symbol_table* symtab,
  		    Layout* layout,
  		    Sized_relobj_file<32, false>* object,
  		    unsigned int data_shndx,
  		    unsigned int sh_type,
  		    const unsigned char* prelocs,
  		    size_t reloc_count,
  		    Output_section* output_section,
  		    bool needs_special_offset_handling,
  		    size_t local_symbol_count,
  		    const unsigned char* plocal_symbols);
  
    // Scan the relocations to look for symbol adjustments.
    void
    scan_relocs(Symbol_table* symtab,
  	      Layout* layout,
  	      Sized_relobj_file<32, false>* object,
  	      unsigned int data_shndx,
  	      unsigned int sh_type,
  	      const unsigned char* prelocs,
  	      size_t reloc_count,
  	      Output_section* output_section,
  	      bool needs_special_offset_handling,
  	      size_t local_symbol_count,
  	      const unsigned char* plocal_symbols);
  
    // Finalize the sections.
    void
    do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
  
    // Return the value to use for a dynamic which requires special
    // treatment.
    uint64_t
    do_dynsym_value(const Symbol*) const;
  
    // Relocate a section.
    void
    relocate_section(const Relocate_info<32, false>*,
  		   unsigned int sh_type,
  		   const unsigned char* prelocs,
  		   size_t reloc_count,
  		   Output_section* output_section,
  		   bool needs_special_offset_handling,
  		   unsigned char* view,
  		   elfcpp::Elf_types<32>::Elf_Addr view_address,
  		   section_size_type view_size,
  		   const Reloc_symbol_changes*);
  
    // Scan the relocs during a relocatable link.
    void
    scan_relocatable_relocs(Symbol_table* symtab,
  			  Layout* layout,
  			  Sized_relobj_file<32, false>* object,
  			  unsigned int data_shndx,
  			  unsigned int sh_type,
  			  const unsigned char* prelocs,
  			  size_t reloc_count,
  			  Output_section* output_section,
  			  bool needs_special_offset_handling,
  			  size_t local_symbol_count,
  			  const unsigned char* plocal_symbols,
  			  Relocatable_relocs*);
  
    // Emit relocations for a section.
    void
    relocate_relocs(const Relocate_info<32, false>*,
  		  unsigned int sh_type,
  		  const unsigned char* prelocs,
  		  size_t reloc_count,
  		  Output_section* output_section,
  		  elfcpp::Elf_types<32>::Elf_Off offset_in_output_section,
  		  const Relocatable_relocs*,
  		  unsigned char* view,
  		  elfcpp::Elf_types<32>::Elf_Addr view_address,
  		  section_size_type view_size,
  		  unsigned char* reloc_view,
  		  section_size_type reloc_view_size);
  
    // Return a string used to fill a code section with nops.
    std::string
    do_code_fill(section_size_type length) const;
  
    // Return whether SYM is defined by the ABI.
    bool
    do_is_defined_by_abi(const Symbol* sym) const
    { return strcmp(sym->name(), "___tls_get_addr") == 0; }
  
    // Return whether a symbol name implies a local label.  The UnixWare
    // 2.1 cc generates temporary symbols that start with .X, so we
    // recognize them here.  FIXME: do other SVR4 compilers also use .X?.
    // If so, we should move the .X recognition into
    // Target::do_is_local_label_name.
    bool
    do_is_local_label_name(const char* name) const
    {
      if (name[0] == '.' && name[1] == 'X')
        return true;
      return Target::do_is_local_label_name(name);
    }
  
    // Return the PLT address to use for a global symbol.
    uint64_t
    do_plt_address_for_global(const Symbol* gsym) const
    { return this->plt_section()->address_for_global(gsym); }
  
    uint64_t
    do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const
    { return this->plt_section()->address_for_local(relobj, symndx); }
  
    // We can tell whether we take the address of a function.
    inline bool
    do_can_check_for_function_pointers() const
    { return true; }
  
    // Return the base for a DW_EH_PE_datarel encoding.
    uint64_t
    do_ehframe_datarel_base() const;
  
    // Return whether SYM is call to a non-split function.
    bool
    do_is_call_to_non_split(const Symbol* sym, unsigned int) const;
  
    // Adjust -fsplit-stack code which calls non-split-stack code.
    void
    do_calls_non_split(Relobj* object, unsigned int shndx,
  		     section_offset_type fnoffset, section_size_type fnsize,
  		     unsigned char* view, section_size_type view_size,
  		     std::string* from, std::string* to) const;
  
    // Return the size of the GOT section.
    section_size_type
    got_size() const
    {
      gold_assert(this->got_ != NULL);
      return this->got_->data_size();
    }
  
    // Return the number of entries in the GOT.
    unsigned int
    got_entry_count() const
    {
      if (this->got_ == NULL)
        return 0;
      return this->got_size() / 4;
    }
  
    // Return the number of entries in the PLT.
    unsigned int
    plt_entry_count() const;
  
    // Return the offset of the first non-reserved PLT entry.
    unsigned int
    first_plt_entry_offset() const;
  
    // Return the size of each PLT entry.
    unsigned int
    plt_entry_size() const;
  
   protected:
    // Instantiate the plt_ member.
    // This chooses the right PLT flavor for an executable or a shared object.
    Output_data_plt_i386*
    make_data_plt(Layout* layout,
  		Output_data_got_plt_i386* got_plt,
  		Output_data_space* got_irelative,
  		bool dyn)
    { return this->do_make_data_plt(layout, got_plt, got_irelative, dyn); }
  
    virtual Output_data_plt_i386*
    do_make_data_plt(Layout* layout,
  		   Output_data_got_plt_i386* got_plt,
  		   Output_data_space* got_irelative,
  		   bool dyn)
    {
      if (dyn)
        return new Output_data_plt_i386_dyn(layout, got_plt, got_irelative);
      else
        return new Output_data_plt_i386_exec(layout, got_plt, got_irelative);
    }
  
   private:
    // The class which scans relocations.
    struct Scan
    {
      static inline int
  
      get_reference_flags(unsigned int r_type);
  
      inline void
      local(Symbol_table* symtab, Layout* layout, Target_i386* target,
  	  Sized_relobj_file<32, false>* object,
  	  unsigned int data_shndx,
  	  Output_section* output_section,
  	  const elfcpp::Rel<32, false>& reloc, unsigned int r_type,
  	  const elfcpp::Sym<32, false>& lsym,
  	  bool is_discarded);
  
      inline void
      global(Symbol_table* symtab, Layout* layout, Target_i386* target,
  	   Sized_relobj_file<32, false>* object,
  	   unsigned int data_shndx,
  	   Output_section* output_section,
  	   const elfcpp::Rel<32, false>& reloc, unsigned int r_type,
  	   Symbol* gsym);
  
      inline bool
      local_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
  					Target_i386* target,
  					Sized_relobj_file<32, false>* object,
  					unsigned int data_shndx,
  					Output_section* output_section,
  					const elfcpp::Rel<32, false>& reloc,
  					unsigned int r_type,
  					const elfcpp::Sym<32, false>& lsym);
  
      inline bool
      global_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
  					 Target_i386* target,
  					 Sized_relobj_file<32, false>* object,
  					 unsigned int data_shndx,
  					 Output_section* output_section,
  					 const elfcpp::Rel<32, false>& reloc,
  					 unsigned int r_type,
  					 Symbol* gsym);
  
      inline bool
      possible_function_pointer_reloc(unsigned int r_type);
  
      bool
      reloc_needs_plt_for_ifunc(Sized_relobj_file<32, false>*,
  			      unsigned int r_type);
  
      static void
      unsupported_reloc_local(Sized_relobj_file<32, false>*, unsigned int r_type);
  
      static void
      unsupported_reloc_global(Sized_relobj_file<32, false>*, unsigned int r_type,
  			     Symbol*);
    };
  
    // The class which implements relocation.
    class Relocate
    {
     public:
      Relocate()
        : skip_call_tls_get_addr_(false),
  	local_dynamic_type_(LOCAL_DYNAMIC_NONE)
      { }
  
      ~Relocate()
      {
        if (this->skip_call_tls_get_addr_)
  	{
  	  // FIXME: This needs to specify the location somehow.
  	  gold_error(_("missing expected TLS relocation"));
  	}
      }
  
      // Return whether the static relocation needs to be applied.
      inline bool
      should_apply_static_reloc(const Sized_symbol<32>* gsym,
  			      unsigned int r_type,
  			      bool is_32bit,
  			      Output_section* output_section);
  
      // Do a relocation.  Return false if the caller should not issue
      // any warnings about this relocation.
      inline bool
      relocate(const Relocate_info<32, false>*, Target_i386*, Output_section*,
  	     size_t relnum, const elfcpp::Rel<32, false>&,
  	     unsigned int r_type, const Sized_symbol<32>*,
  	     const Symbol_value<32>*,
  	     unsigned char*, elfcpp::Elf_types<32>::Elf_Addr,
  	     section_size_type);
  
     private:
      // Do a TLS relocation.
      inline void
      relocate_tls(const Relocate_info<32, false>*, Target_i386* target,
  		 size_t relnum, const elfcpp::Rel<32, false>&,
  		 unsigned int r_type, const Sized_symbol<32>*,
  		 const Symbol_value<32>*,
  		 unsigned char*, elfcpp::Elf_types<32>::Elf_Addr,
  		 section_size_type);
  
      // Do a TLS General-Dynamic to Initial-Exec transition.
      inline void
      tls_gd_to_ie(const Relocate_info<32, false>*, size_t relnum,
  		 Output_segment* tls_segment,
  		 const elfcpp::Rel<32, false>&, unsigned int r_type,
  		 elfcpp::Elf_types<32>::Elf_Addr value,
  		 unsigned char* view,
  		 section_size_type view_size);
  
      // Do a TLS General-Dynamic to Local-Exec transition.
      inline void
      tls_gd_to_le(const Relocate_info<32, false>*, size_t relnum,
  		 Output_segment* tls_segment,
  		 const elfcpp::Rel<32, false>&, unsigned int r_type,
  		 elfcpp::Elf_types<32>::Elf_Addr value,
  		 unsigned char* view,
  		 section_size_type view_size);
  
      // Do a TLS_GOTDESC or TLS_DESC_CALL General-Dynamic to Initial-Exec
      // transition.
      inline void
      tls_desc_gd_to_ie(const Relocate_info<32, false>*, size_t relnum,
  		      Output_segment* tls_segment,
  		      const elfcpp::Rel<32, false>&, unsigned int r_type,
  		      elfcpp::Elf_types<32>::Elf_Addr value,
  		      unsigned char* view,
  		      section_size_type view_size);
  
      // Do a TLS_GOTDESC or TLS_DESC_CALL General-Dynamic to Local-Exec
      // transition.
      inline void
      tls_desc_gd_to_le(const Relocate_info<32, false>*, size_t relnum,
  		      Output_segment* tls_segment,
  		      const elfcpp::Rel<32, false>&, unsigned int r_type,
  		      elfcpp::Elf_types<32>::Elf_Addr value,
  		      unsigned char* view,
  		      section_size_type view_size);
  
      // Do a TLS Local-Dynamic to Local-Exec transition.
      inline void
      tls_ld_to_le(const Relocate_info<32, false>*, size_t relnum,
  		 Output_segment* tls_segment,
  		 const elfcpp::Rel<32, false>&, unsigned int r_type,
  		 elfcpp::Elf_types<32>::Elf_Addr value,
  		 unsigned char* view,
  		 section_size_type view_size);
  
      // Do a TLS Initial-Exec to Local-Exec transition.
      static inline void
      tls_ie_to_le(const Relocate_info<32, false>*, size_t relnum,
  		 Output_segment* tls_segment,
  		 const elfcpp::Rel<32, false>&, unsigned int r_type,
  		 elfcpp::Elf_types<32>::Elf_Addr value,
  		 unsigned char* view,
  		 section_size_type view_size);
  
      // We need to keep track of which type of local dynamic relocation
      // we have seen, so that we can optimize R_386_TLS_LDO_32 correctly.
      enum Local_dynamic_type
      {
        LOCAL_DYNAMIC_NONE,
        LOCAL_DYNAMIC_SUN,
        LOCAL_DYNAMIC_GNU
      };
  
      // This is set if we should skip the next reloc, which should be a
      // PLT32 reloc against ___tls_get_addr.
      bool skip_call_tls_get_addr_;
      // The type of local dynamic relocation we have seen in the section
      // being relocated, if any.
      Local_dynamic_type local_dynamic_type_;
    };
  
    // A class which returns the size required for a relocation type,
    // used while scanning relocs during a relocatable link.
    class Relocatable_size_for_reloc
    {
     public:
      unsigned int
      get_size_for_reloc(unsigned int, Relobj*);
    };
  
    // Adjust TLS relocation type based on the options and whether this
    // is a local symbol.
    static tls::Tls_optimization
    optimize_tls_reloc(bool is_final, int r_type);
  
    // Get the GOT section, creating it if necessary.
    Output_data_got<32, false>*
    got_section(Symbol_table*, Layout*);
  
    // Get the GOT PLT section.
    Output_data_got_plt_i386*
    got_plt_section() const
    {
      gold_assert(this->got_plt_ != NULL);
      return this->got_plt_;
    }
  
    // Get the GOT section for TLSDESC entries.
    Output_data_got<32, false>*
    got_tlsdesc_section() const
    {
      gold_assert(this->got_tlsdesc_ != NULL);
      return this->got_tlsdesc_;
    }
  
    // Create the PLT section.
    void
    make_plt_section(Symbol_table* symtab, Layout* layout);
  
    // Create a PLT entry for a global symbol.
    void
    make_plt_entry(Symbol_table*, Layout*, Symbol*);
  
    // Create a PLT entry for a local STT_GNU_IFUNC symbol.
    void
    make_local_ifunc_plt_entry(Symbol_table*, Layout*,
  			     Sized_relobj_file<32, false>* relobj,
  			     unsigned int local_sym_index);
  
    // Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
    void
    define_tls_base_symbol(Symbol_table*, Layout*);
  
    // Create a GOT entry for the TLS module index.
    unsigned int
    got_mod_index_entry(Symbol_table* symtab, Layout* layout,
  		      Sized_relobj_file<32, false>* object);
  
    // Get the PLT section.
    Output_data_plt_i386*
    plt_section() const
    {
      gold_assert(this->plt_ != NULL);
      return this->plt_;
    }
  
    // Get the dynamic reloc section, creating it if necessary.
    Reloc_section*
    rel_dyn_section(Layout*);
  
    // Get the section to use for TLS_DESC relocations.
    Reloc_section*
    rel_tls_desc_section(Layout*) const;
  
    // Get the section to use for IRELATIVE relocations.
    Reloc_section*
    rel_irelative_section(Layout*);
  
    // Add a potential copy relocation.
    void
    copy_reloc(Symbol_table* symtab, Layout* layout,
  	     Sized_relobj_file<32, false>* object,
  	     unsigned int shndx, Output_section* output_section,
  	     Symbol* sym, const elfcpp::Rel<32, false>& reloc)
    {
      this->copy_relocs_.copy_reloc(symtab, layout,
  				  symtab->get_sized_symbol<32>(sym),
  				  object, shndx, output_section, reloc,
  				  this->rel_dyn_section(layout));
    }
  
    // Information about this specific target which we pass to the
    // general Target structure.
    static const Target::Target_info i386_info;
  
    // The types of GOT entries needed for this platform.
    // These values are exposed to the ABI in an incremental link.
    // Do not renumber existing values without changing the version
    // number of the .gnu_incremental_inputs section.
    enum Got_type
    {
      GOT_TYPE_STANDARD = 0,      // GOT entry for a regular symbol
      GOT_TYPE_TLS_NOFFSET = 1,   // GOT entry for negative TLS offset
      GOT_TYPE_TLS_OFFSET = 2,    // GOT entry for positive TLS offset
      GOT_TYPE_TLS_PAIR = 3,      // GOT entry for TLS module/offset pair
      GOT_TYPE_TLS_DESC = 4       // GOT entry for TLS_DESC pair
    };
  
    // The GOT section.
    Output_data_got<32, false>* got_;
    // The PLT section.
    Output_data_plt_i386* plt_;
    // The GOT PLT section.
    Output_data_got_plt_i386* got_plt_;
    // The GOT section for IRELATIVE relocations.
    Output_data_space* got_irelative_;
    // The GOT section for TLSDESC relocations.
    Output_data_got<32, false>* got_tlsdesc_;
    // The _GLOBAL_OFFSET_TABLE_ symbol.
    Symbol* global_offset_table_;
    // The dynamic reloc section.
    Reloc_section* rel_dyn_;
    // The section to use for IRELATIVE relocs.
    Reloc_section* rel_irelative_;
    // Relocs saved to avoid a COPY reloc.
    Copy_relocs<elfcpp::SHT_REL, 32, false> copy_relocs_;
    // Offset of the GOT entry for the TLS module index.
    unsigned int got_mod_index_offset_;
    // True if the _TLS_MODULE_BASE_ symbol has been defined.
    bool tls_base_symbol_defined_;
  };
  
  const Target::Target_info Target_i386::i386_info =
  {
    32,			// size
    false,		// is_big_endian
    elfcpp::EM_386,	// machine_code
    false,		// has_make_symbol
    false,		// has_resolve
    true,			// has_code_fill
    true,			// is_default_stack_executable
    true,			// can_icf_inline_merge_sections
    '\0',			// wrap_char
    "/usr/lib/libc.so.1",	// dynamic_linker
    0x08048000,		// default_text_segment_address
    0x1000,		// abi_pagesize (overridable by -z max-page-size)
    0x1000,		// common_pagesize (overridable by -z common-page-size)
    false,                // isolate_execinstr
    0,                    // rosegment_gap
    elfcpp::SHN_UNDEF,	// small_common_shndx
    elfcpp::SHN_UNDEF,	// large_common_shndx
    0,			// small_common_section_flags
    0,			// large_common_section_flags
    NULL,			// attributes_section
    NULL,			// attributes_vendor
    "_start"		// entry_symbol_name
  };
  
  // Get the GOT section, creating it if necessary.
  
  Output_data_got<32, false>*
  Target_i386::got_section(Symbol_table* symtab, Layout* layout)
  {
    if (this->got_ == NULL)
      {
        gold_assert(symtab != NULL && layout != NULL);
  
        this->got_ = new Output_data_got<32, false>();
  
        // When using -z now, we can treat .got.plt as a relro section.
        // Without -z now, it is modified after program startup by lazy
        // PLT relocations.
        bool is_got_plt_relro = parameters->options().now();
        Output_section_order got_order = (is_got_plt_relro
  					? ORDER_RELRO
  					: ORDER_RELRO_LAST);
        Output_section_order got_plt_order = (is_got_plt_relro
  					    ? ORDER_RELRO
  					    : ORDER_NON_RELRO_FIRST);
  
        layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
  				      (elfcpp::SHF_ALLOC
  				       | elfcpp::SHF_WRITE),
  				      this->got_, got_order, true);
  
        this->got_plt_ = new Output_data_got_plt_i386(layout);
        layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS,
  				      (elfcpp::SHF_ALLOC
  				       | elfcpp::SHF_WRITE),
  				      this->got_plt_, got_plt_order,
  				      is_got_plt_relro);
  
        // The first three entries are reserved.
        this->got_plt_->set_current_data_size(3 * 4);
  
        if (!is_got_plt_relro)
  	{
  	  // Those bytes can go into the relro segment.
  	  layout->increase_relro(3 * 4);
  	}
  
        // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT.
        this->global_offset_table_ =
  	symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
  				      Symbol_table::PREDEFINED,
  				      this->got_plt_,
  				      0, 0, elfcpp::STT_OBJECT,
  				      elfcpp::STB_LOCAL,
  				      elfcpp::STV_HIDDEN, 0,
  				      false, false);
  
        // If there are any IRELATIVE relocations, they get GOT entries
        // in .got.plt after the jump slot relocations.
        this->got_irelative_ = new Output_data_space(4, "** GOT IRELATIVE PLT");
        layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS,
  				      (elfcpp::SHF_ALLOC
  				       | elfcpp::SHF_WRITE),
  				      this->got_irelative_,
  				      got_plt_order, is_got_plt_relro);
  
        // If there are any TLSDESC relocations, they get GOT entries in
        // .got.plt after the jump slot entries.
        this->got_tlsdesc_ = new Output_data_got<32, false>();
        layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS,
  				      (elfcpp::SHF_ALLOC
  				       | elfcpp::SHF_WRITE),
  				      this->got_tlsdesc_,
  				      got_plt_order, is_got_plt_relro);
      }
  
    return this->got_;
  }
  
  // Get the dynamic reloc section, creating it if necessary.
  
  Target_i386::Reloc_section*
  Target_i386::rel_dyn_section(Layout* layout)
  {
    if (this->rel_dyn_ == NULL)
      {
        gold_assert(layout != NULL);
        this->rel_dyn_ = new Reloc_section(parameters->options().combreloc());
        layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL,
  				      elfcpp::SHF_ALLOC, this->rel_dyn_,
  				      ORDER_DYNAMIC_RELOCS, false);
      }
    return this->rel_dyn_;
  }
  
  // Get the section to use for IRELATIVE relocs, creating it if
  // necessary.  These go in .rel.dyn, but only after all other dynamic
  // relocations.  They need to follow the other dynamic relocations so
  // that they can refer to global variables initialized by those
  // relocs.
  
  Target_i386::Reloc_section*
  Target_i386::rel_irelative_section(Layout* layout)
  {
    if (this->rel_irelative_ == NULL)
      {
        // Make sure we have already create the dynamic reloc section.
        this->rel_dyn_section(layout);
        this->rel_irelative_ = new Reloc_section(false);
        layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL,
  				      elfcpp::SHF_ALLOC, this->rel_irelative_,
  				      ORDER_DYNAMIC_RELOCS, false);
        gold_assert(this->rel_dyn_->output_section()
  		  == this->rel_irelative_->output_section());
      }
    return this->rel_irelative_;
  }
  
  // Write the first three reserved words of the .got.plt section.
  // The remainder of the section is written while writing the PLT
  // in Output_data_plt_i386::do_write.
  
  void
  Output_data_got_plt_i386::do_write(Output_file* of)
  {
    // The first entry in the GOT is the address of the .dynamic section
    // aka the PT_DYNAMIC segment.  The next two entries are reserved.
    // We saved space for them when we created the section in
    // Target_i386::got_section.
    const off_t got_file_offset = this->offset();
    gold_assert(this->data_size() >= 12);
    unsigned char* const got_view = of->get_output_view(got_file_offset, 12);
    Output_section* dynamic = this->layout_->dynamic_section();
    uint32_t dynamic_addr = dynamic == NULL ? 0 : dynamic->address();
    elfcpp::Swap<32, false>::writeval(got_view, dynamic_addr);
    memset(got_view + 4, 0, 8);
    of->write_output_view(got_file_offset, 12, got_view);
  }
  
  // Create the PLT section.  The ordinary .got section is an argument,
  // since we need to refer to the start.  We also create our own .got
  // section just for PLT entries.
  
  Output_data_plt_i386::Output_data_plt_i386(Layout* layout,
  					   uint64_t addralign,
  					   Output_data_got_plt_i386* got_plt,
  					   Output_data_space* got_irelative)
    : Output_section_data(addralign),
      tls_desc_rel_(NULL), irelative_rel_(NULL), got_plt_(got_plt),
      got_irelative_(got_irelative), count_(0), irelative_count_(0),
      global_ifuncs_(), local_ifuncs_()
  {
    this->rel_ = new Reloc_section(false);
    layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL,
  				  elfcpp::SHF_ALLOC, this->rel_,
  				  ORDER_DYNAMIC_PLT_RELOCS, false);
  }
  
  void
  Output_data_plt_i386::do_adjust_output_section(Output_section* os)
  {
    // UnixWare sets the entsize of .plt to 4, and so does the old GNU
    // linker, and so do we.
    os->set_entsize(4);
  }
  
  // Add an entry to the PLT.
  
  void
  Output_data_plt_i386::add_entry(Symbol_table* symtab, Layout* layout,
  				Symbol* gsym)
  {
    gold_assert(!gsym->has_plt_offset());
  
    // Every PLT entry needs a reloc.
    if (gsym->type() == elfcpp::STT_GNU_IFUNC
        && gsym->can_use_relative_reloc(false))
      {
        gsym->set_plt_offset(this->irelative_count_ * this->get_plt_entry_size());
        ++this->irelative_count_;
        section_offset_type got_offset =
  	this->got_irelative_->current_data_size();
        this->got_irelative_->set_current_data_size(got_offset + 4);
        Reloc_section* rel = this->rel_irelative(symtab, layout);
        rel->add_symbolless_global_addend(gsym, elfcpp::R_386_IRELATIVE,
  					this->got_irelative_, got_offset);
        struct Global_ifunc gi;
        gi.sym = gsym;
        gi.got_offset = got_offset;
        this->global_ifuncs_.push_back(gi);
      }
    else
      {
        // When setting the PLT offset we skip the initial reserved PLT
        // entry.
        gsym->set_plt_offset((this->count_ + 1) * this->get_plt_entry_size());
  
        ++this->count_;
  
        section_offset_type got_offset = this->got_plt_->current_data_size();
  
        // Every PLT entry needs a GOT entry which points back to the
        // PLT entry (this will be changed by the dynamic linker,
        // normally lazily when the function is called).
        this->got_plt_->set_current_data_size(got_offset + 4);
  
        gsym->set_needs_dynsym_entry();
        this->rel_->add_global(gsym, elfcpp::R_386_JUMP_SLOT, this->got_plt_,
  			     got_offset);
      }
  
    // Note that we don't need to save the symbol.  The contents of the
    // PLT are independent of which symbols are used.  The symbols only
    // appear in the relocations.
  }
  
  // Add an entry to the PLT for a local STT_GNU_IFUNC symbol.  Return
  // the PLT offset.
  
  unsigned int
  Output_data_plt_i386::add_local_ifunc_entry(
      Symbol_table* symtab,
      Layout* layout,
      Sized_relobj_file<32, false>* relobj,
      unsigned int local_sym_index)
  {
    unsigned int plt_offset = this->irelative_count_ * this->get_plt_entry_size();
    ++this->irelative_count_;
  
    section_offset_type got_offset = this->got_irelative_->current_data_size();
  
    // Every PLT entry needs a GOT entry which points back to the PLT
    // entry.
    this->got_irelative_->set_current_data_size(got_offset + 4);
  
    // Every PLT entry needs a reloc.
    Reloc_section* rel = this->rel_irelative(symtab, layout);
    rel->add_symbolless_local_addend(relobj, local_sym_index,
  				   elfcpp::R_386_IRELATIVE,
  				   this->got_irelative_, got_offset);
  
    struct Local_ifunc li;
    li.object = relobj;
    li.local_sym_index = local_sym_index;
    li.got_offset = got_offset;
    this->local_ifuncs_.push_back(li);
  
    return plt_offset;
  }
  
  // Return where the TLS_DESC relocations should go, creating it if
  // necessary. These follow the JUMP_SLOT relocations.
  
  Output_data_plt_i386::Reloc_section*
  Output_data_plt_i386::rel_tls_desc(Layout* layout)
  {
    if (this->tls_desc_rel_ == NULL)
      {
        this->tls_desc_rel_ = new Reloc_section(false);
        layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL,
  				      elfcpp::SHF_ALLOC, this->tls_desc_rel_,
  				      ORDER_DYNAMIC_PLT_RELOCS, false);
        gold_assert(this->tls_desc_rel_->output_section()
  		  == this->rel_->output_section());
      }
    return this->tls_desc_rel_;
  }
  
  // Return where the IRELATIVE relocations should go in the PLT.  These
  // follow the JUMP_SLOT and TLS_DESC relocations.
  
  Output_data_plt_i386::Reloc_section*
  Output_data_plt_i386::rel_irelative(Symbol_table* symtab, Layout* layout)
  {
    if (this->irelative_rel_ == NULL)
      {
        // Make sure we have a place for the TLS_DESC relocations, in
        // case we see any later on.
        this->rel_tls_desc(layout);
        this->irelative_rel_ = new Reloc_section(false);
        layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL,
  				      elfcpp::SHF_ALLOC, this->irelative_rel_,
  				      ORDER_DYNAMIC_PLT_RELOCS, false);
        gold_assert(this->irelative_rel_->output_section()
  		  == this->rel_->output_section());
  
        if (parameters->doing_static_link())
  	{
  	  // A statically linked executable will only have a .rel.plt
  	  // section to hold R_386_IRELATIVE relocs for STT_GNU_IFUNC
  	  // symbols.  The library will use these symbols to locate
  	  // the IRELATIVE relocs at program startup time.
  	  symtab->define_in_output_data("__rel_iplt_start", NULL,
  					Symbol_table::PREDEFINED,
  					this->irelative_rel_, 0, 0,
  					elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
  					elfcpp::STV_HIDDEN, 0, false, true);
  	  symtab->define_in_output_data("__rel_iplt_end", NULL,
  					Symbol_table::PREDEFINED,
  					this->irelative_rel_, 0, 0,
  					elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
  					elfcpp::STV_HIDDEN, 0, true, true);
  	}
      }
    return this->irelative_rel_;
  }
  
  // Return the PLT address to use for a global symbol.
  
  uint64_t
  Output_data_plt_i386::address_for_global(const Symbol* gsym)
  {
    uint64_t offset = 0;
    if (gsym->type() == elfcpp::STT_GNU_IFUNC
        && gsym->can_use_relative_reloc(false))
      offset = (this->count_ + 1) * this->get_plt_entry_size();
    return this->address() + offset + gsym->plt_offset();
  }
  
  // Return the PLT address to use for a local symbol.  These are always
  // IRELATIVE relocs.
  
  uint64_t
  Output_data_plt_i386::address_for_local(const Relobj* object,
  					unsigned int r_sym)
  {
    return (this->address()
  	  + (this->count_ + 1) * this->get_plt_entry_size()
  	  + object->local_plt_offset(r_sym));
  }
  
  // The first entry in the PLT for an executable.
  
  const unsigned char Output_data_plt_i386_exec::first_plt_entry[plt_entry_size] =
  {
    0xff, 0x35,	// pushl contents of memory address
    0, 0, 0, 0,	// replaced with address of .got + 4
    0xff, 0x25,	// jmp indirect
    0, 0, 0, 0,	// replaced with address of .got + 8
    0, 0, 0, 0	// unused
  };
  
  void
  Output_data_plt_i386_exec::do_fill_first_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr got_address)
  {
    memcpy(pov, first_plt_entry, plt_entry_size);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 2, got_address + 4);
    elfcpp::Swap<32, false>::writeval(pov + 8, got_address + 8);
  }
  
  // The first entry in the PLT for a shared object.
  
  const unsigned char Output_data_plt_i386_dyn::first_plt_entry[plt_entry_size] =
  {
    0xff, 0xb3, 4, 0, 0, 0,	// pushl 4(%ebx)
    0xff, 0xa3, 8, 0, 0, 0,	// jmp *8(%ebx)
    0, 0, 0, 0			// unused
  };
  
  void
  Output_data_plt_i386_dyn::do_fill_first_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr)
  {
    memcpy(pov, first_plt_entry, plt_entry_size);
  }
  
  // Subsequent entries in the PLT for an executable.
  
  const unsigned char Output_data_plt_i386_exec::plt_entry[plt_entry_size] =
  {
    0xff, 0x25,	// jmp indirect
    0, 0, 0, 0,	// replaced with address of symbol in .got
    0x68,		// pushl immediate
    0, 0, 0, 0,	// replaced with offset into relocation table
    0xe9,		// jmp relative
    0, 0, 0, 0	// replaced with offset to start of .plt
  };
  
  unsigned int
  Output_data_plt_i386_exec::do_fill_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr got_address,
      unsigned int got_offset,
      unsigned int plt_offset,
      unsigned int plt_rel_offset)
  {
    memcpy(pov, plt_entry, plt_entry_size);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 2,
  					      got_address + got_offset);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 7, plt_rel_offset);
    elfcpp::Swap<32, false>::writeval(pov + 12, - (plt_offset + 12 + 4));
    return 6;
  }
  
  // Subsequent entries in the PLT for a shared object.
  
  const unsigned char Output_data_plt_i386_dyn::plt_entry[plt_entry_size] =
  {
    0xff, 0xa3,	// jmp *offset(%ebx)
    0, 0, 0, 0,	// replaced with offset of symbol in .got
    0x68,		// pushl immediate
    0, 0, 0, 0,	// replaced with offset into relocation table
    0xe9,		// jmp relative
    0, 0, 0, 0	// replaced with offset to start of .plt
  };
  
  unsigned int
  Output_data_plt_i386_dyn::do_fill_plt_entry(unsigned char* pov,
  					    elfcpp::Elf_types<32>::Elf_Addr,
  					    unsigned int got_offset,
  					    unsigned int plt_offset,
  					    unsigned int plt_rel_offset)
  {
    memcpy(pov, plt_entry, plt_entry_size);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 2, got_offset);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 7, plt_rel_offset);
    elfcpp::Swap<32, false>::writeval(pov + 12, - (plt_offset + 12 + 4));
    return 6;
  }
  
  // The .eh_frame unwind information for the PLT.
  
  const unsigned char
  Output_data_plt_i386::plt_eh_frame_cie[plt_eh_frame_cie_size] =
  {
    1,				// CIE version.
    'z',				// Augmentation: augmentation size included.
    'R',				// Augmentation: FDE encoding included.
    '\0',				// End of augmentation string.
    1,				// Code alignment factor.
    0x7c,				// Data alignment factor.
    8,				// Return address column.
    1,				// Augmentation size.
    (elfcpp::DW_EH_PE_pcrel	// FDE encoding.
     | elfcpp::DW_EH_PE_sdata4),
    elfcpp::DW_CFA_def_cfa, 4, 4,	// DW_CFA_def_cfa: r4 (esp) ofs 4.
    elfcpp::DW_CFA_offset + 8, 1,	// DW_CFA_offset: r8 (eip) at cfa-4.
    elfcpp::DW_CFA_nop,		// Align to 16 bytes.
    elfcpp::DW_CFA_nop
  };
  
  const unsigned char
  Output_data_plt_i386_standard::plt_eh_frame_fde[plt_eh_frame_fde_size] =
  {
    0, 0, 0, 0,				// Replaced with offset to .plt.
    0, 0, 0, 0,				// Replaced with size of .plt.
    0,					// Augmentation size.
    elfcpp::DW_CFA_def_cfa_offset, 8,	// DW_CFA_def_cfa_offset: 8.
    elfcpp::DW_CFA_advance_loc + 6,	// Advance 6 to __PLT__ + 6.
    elfcpp::DW_CFA_def_cfa_offset, 12,	// DW_CFA_def_cfa_offset: 12.
    elfcpp::DW_CFA_advance_loc + 10,	// Advance 10 to __PLT__ + 16.
    elfcpp::DW_CFA_def_cfa_expression,	// DW_CFA_def_cfa_expression.
    11,					// Block length.
    elfcpp::DW_OP_breg4, 4,		// Push %esp + 4.
    elfcpp::DW_OP_breg8, 0,		// Push %eip.
    elfcpp::DW_OP_lit15,			// Push 0xf.
    elfcpp::DW_OP_and,			// & (%eip & 0xf).
    elfcpp::DW_OP_lit11,			// Push 0xb.
    elfcpp::DW_OP_ge,			// >= ((%eip & 0xf) >= 0xb)
    elfcpp::DW_OP_lit2,			// Push 2.
    elfcpp::DW_OP_shl,			// << (((%eip & 0xf) >= 0xb) << 2)
    elfcpp::DW_OP_plus,			// + ((((%eip&0xf)>=0xb)<<2)+%esp+4
    elfcpp::DW_CFA_nop,			// Align to 32 bytes.
    elfcpp::DW_CFA_nop,
    elfcpp::DW_CFA_nop,
    elfcpp::DW_CFA_nop
  };
  
  // Write out the PLT.  This uses the hand-coded instructions above,
  // and adjusts them as needed.  This is all specified by the i386 ELF
  // Processor Supplement.
  
  void
  Output_data_plt_i386::do_write(Output_file* of)
  {
    const off_t offset = this->offset();
    const section_size_type oview_size =
      convert_to_section_size_type(this->data_size());
    unsigned char* const oview = of->get_output_view(offset, oview_size);
  
    const off_t got_file_offset = this->got_plt_->offset();
    gold_assert(parameters->incremental_update()
  	      || (got_file_offset + this->got_plt_->data_size()
  		  == this->got_irelative_->offset()));
    const section_size_type got_size =
      convert_to_section_size_type(this->got_plt_->data_size()
  				 + this->got_irelative_->data_size());
  
    unsigned char* const got_view = of->get_output_view(got_file_offset,
  						      got_size);
  
    unsigned char* pov = oview;
  
    elfcpp::Elf_types<32>::Elf_Addr plt_address = this->address();
    elfcpp::Elf_types<32>::Elf_Addr got_address = this->got_plt_->address();
  
    this->fill_first_plt_entry(pov, got_address);
    pov += this->get_plt_entry_size();
  
    // The first three entries in the GOT are reserved, and are written
    // by Output_data_got_plt_i386::do_write.
    unsigned char* got_pov = got_view + 12;
  
    const int rel_size = elfcpp::Elf_sizes<32>::rel_size;
  
    unsigned int plt_offset = this->get_plt_entry_size();
    unsigned int plt_rel_offset = 0;
    unsigned int got_offset = 12;
    const unsigned int count = this->count_ + this->irelative_count_;
    for (unsigned int i = 0;
         i < count;
         ++i,
  	 pov += this->get_plt_entry_size(),
  	 got_pov += 4,
  	 plt_offset += this->get_plt_entry_size(),
  	 plt_rel_offset += rel_size,
  	 got_offset += 4)
      {
        // Set and adjust the PLT entry itself.
        unsigned int lazy_offset = this->fill_plt_entry(pov,
  						      got_address,
  						      got_offset,
  						      plt_offset,
  						      plt_rel_offset);
  
        // Set the entry in the GOT.
        elfcpp::Swap<32, false>::writeval(got_pov,
  					plt_address + plt_offset + lazy_offset);
      }
  
    // If any STT_GNU_IFUNC symbols have PLT entries, we need to change
    // the GOT to point to the actual symbol value, rather than point to
    // the PLT entry.  That will let the dynamic linker call the right
    // function when resolving IRELATIVE relocations.
    unsigned char* got_irelative_view = got_view + this->got_plt_->data_size();
    for (std::vector<Global_ifunc>::const_iterator p =
  	 this->global_ifuncs_.begin();
         p != this->global_ifuncs_.end();
         ++p)
      {
        const Sized_symbol<32>* ssym =
  	static_cast<const Sized_symbol<32>*>(p->sym);
        elfcpp::Swap<32, false>::writeval(got_irelative_view + p->got_offset,
  					ssym->value());
      }
  
    for (std::vector<Local_ifunc>::const_iterator p =
  	 this->local_ifuncs_.begin();
         p != this->local_ifuncs_.end();
         ++p)
      {
        const Symbol_value<32>* psymval =
  	p->object->local_symbol(p->local_sym_index);
        elfcpp::Swap<32, false>::writeval(got_irelative_view + p->got_offset,
  					psymval->value(p->object, 0));
      }
  
    gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
    gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size);
  
    of->write_output_view(offset, oview_size, oview);
    of->write_output_view(got_file_offset, got_size, got_view);
  }
  
  // Create the PLT section.
  
  void
  Target_i386::make_plt_section(Symbol_table* symtab, Layout* layout)
  {
    if (this->plt_ == NULL)
      {
        // Create the GOT sections first.
        this->got_section(symtab, layout);
  
        const bool dyn = parameters->options().output_is_position_independent();
        this->plt_ = this->make_data_plt(layout,
  				       this->got_plt_,
  				       this->got_irelative_,
  				       dyn);
  
        // Add unwind information if requested.
        if (parameters->options().ld_generated_unwind_info())
  	this->plt_->add_eh_frame(layout);
  
        layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
  				      (elfcpp::SHF_ALLOC
  				       | elfcpp::SHF_EXECINSTR),
  				      this->plt_, ORDER_PLT, false);
  
        // Make the sh_info field of .rel.plt point to .plt.
        Output_section* rel_plt_os = this->plt_->rel_plt()->output_section();
        rel_plt_os->set_info_section(this->plt_->output_section());
      }
  }
  
  // Create a PLT entry for a global symbol.
  
  void
  Target_i386::make_plt_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym)
  {
    if (gsym->has_plt_offset())
      return;
    if (this->plt_ == NULL)
      this->make_plt_section(symtab, layout);
    this->plt_->add_entry(symtab, layout, gsym);
  }
  
  // Make a PLT entry for a local STT_GNU_IFUNC symbol.
  
  void
  Target_i386::make_local_ifunc_plt_entry(Symbol_table* symtab, Layout* layout,
  					Sized_relobj_file<32, false>* relobj,
  					unsigned int local_sym_index)
  {
    if (relobj->local_has_plt_offset(local_sym_index))
      return;
    if (this->plt_ == NULL)
      this->make_plt_section(symtab, layout);
    unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout,
  							      relobj,
  							      local_sym_index);
    relobj->set_local_plt_offset(local_sym_index, plt_offset);
  }
  
  // Return the number of entries in the PLT.
  
  unsigned int
  Target_i386::plt_entry_count() const
  {
    if (this->plt_ == NULL)
      return 0;
    return this->plt_->entry_count();
  }
  
  // Return the offset of the first non-reserved PLT entry.
  
  unsigned int
  Target_i386::first_plt_entry_offset() const
  {
    return this->plt_->first_plt_entry_offset();
  }
  
  // Return the size of each PLT entry.
  
  unsigned int
  Target_i386::plt_entry_size() const
  {
    return this->plt_->get_plt_entry_size();
  }
  
  // Get the section to use for TLS_DESC relocations.
  
  Target_i386::Reloc_section*
  Target_i386::rel_tls_desc_section(Layout* layout) const
  {
    return this->plt_section()->rel_tls_desc(layout);
  }
  
  // Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
  
  void
  Target_i386::define_tls_base_symbol(Symbol_table* symtab, Layout* layout)
  {
    if (this->tls_base_symbol_defined_)
      return;
  
    Output_segment* tls_segment = layout->tls_segment();
    if (tls_segment != NULL)
      {
        bool is_exec = parameters->options().output_is_executable();
        symtab->define_in_output_segment("_TLS_MODULE_BASE_", NULL,
  				       Symbol_table::PREDEFINED,
  				       tls_segment, 0, 0,
  				       elfcpp::STT_TLS,
  				       elfcpp::STB_LOCAL,
  				       elfcpp::STV_HIDDEN, 0,
  				       (is_exec
  					? Symbol::SEGMENT_END
  					: Symbol::SEGMENT_START),
  				       true);
      }
    this->tls_base_symbol_defined_ = true;
  }
  
  // Create a GOT entry for the TLS module index.
  
  unsigned int
  Target_i386::got_mod_index_entry(Symbol_table* symtab, Layout* layout,
  				 Sized_relobj_file<32, false>* object)
  {
    if (this->got_mod_index_offset_ == -1U)
      {
        gold_assert(symtab != NULL && layout != NULL && object != NULL);
        Reloc_section* rel_dyn = this->rel_dyn_section(layout);
        Output_data_got<32, false>* got = this->got_section(symtab, layout);
        unsigned int got_offset = got->add_constant(0);
        rel_dyn->add_local(object, 0, elfcpp::R_386_TLS_DTPMOD32, got,
  			 got_offset);
        got->add_constant(0);
        this->got_mod_index_offset_ = got_offset;
      }
    return this->got_mod_index_offset_;
  }
  
  // Optimize the TLS relocation type based on what we know about the
  // symbol.  IS_FINAL is true if the final address of this symbol is
  // known at link time.
  
  tls::Tls_optimization
  Target_i386::optimize_tls_reloc(bool is_final, int r_type)
  {
    // If we are generating a shared library, then we can't do anything
    // in the linker.
    if (parameters->options().shared())
      return tls::TLSOPT_NONE;
  
    switch (r_type)
      {
      case elfcpp::R_386_TLS_GD:
      case elfcpp::R_386_TLS_GOTDESC:
      case elfcpp::R_386_TLS_DESC_CALL:
        // These are General-Dynamic which permits fully general TLS
        // access.  Since we know that we are generating an executable,
        // we can convert this to Initial-Exec.  If we also know that
        // this is a local symbol, we can further switch to Local-Exec.
        if (is_final)
  	return tls::TLSOPT_TO_LE;
        return tls::TLSOPT_TO_IE;
  
      case elfcpp::R_386_TLS_LDM:
        // This is Local-Dynamic, which refers to a local symbol in the
        // dynamic TLS block.  Since we know that we generating an
        // executable, we can switch to Local-Exec.
        return tls::TLSOPT_TO_LE;
  
      case elfcpp::R_386_TLS_LDO_32:
        // Another type of Local-Dynamic relocation.
        return tls::TLSOPT_TO_LE;
  
      case elfcpp::R_386_TLS_IE:
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_IE_32:
        // These are Initial-Exec relocs which get the thread offset
        // from the GOT.  If we know that we are linking against the
        // local symbol, we can switch to Local-Exec, which links the
        // thread offset into the instruction.
        if (is_final)
  	return tls::TLSOPT_TO_LE;
        return tls::TLSOPT_NONE;
  
      case elfcpp::R_386_TLS_LE:
      case elfcpp::R_386_TLS_LE_32:
        // When we already have Local-Exec, there is nothing further we
        // can do.
        return tls::TLSOPT_NONE;
  
      default:
        gold_unreachable();
      }
  }
  
  // Get the Reference_flags for a particular relocation.
  
  int
  Target_i386::Scan::get_reference_flags(unsigned int r_type)
  {
    switch (r_type)
      {
      case elfcpp::R_386_NONE:
      case elfcpp::R_386_GNU_VTINHERIT:
      case elfcpp::R_386_GNU_VTENTRY:
      case elfcpp::R_386_GOTPC:
        // No symbol reference.
        return 0;
  
      case elfcpp::R_386_32:
      case elfcpp::R_386_16:
      case elfcpp::R_386_8:
        return Symbol::ABSOLUTE_REF;
  
      case elfcpp::R_386_PC32:
      case elfcpp::R_386_PC16:
      case elfcpp::R_386_PC8:
      case elfcpp::R_386_GOTOFF:
        return Symbol::RELATIVE_REF;
  
      case elfcpp::R_386_PLT32:
        return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
  
      case elfcpp::R_386_GOT32:
        // Absolute in GOT.
        return Symbol::ABSOLUTE_REF;
  
      case elfcpp::R_386_TLS_GD:            // Global-dynamic
      case elfcpp::R_386_TLS_GOTDESC:       // Global-dynamic (from ~oliva url)
      case elfcpp::R_386_TLS_DESC_CALL:
      case elfcpp::R_386_TLS_LDM:           // Local-dynamic
      case elfcpp::R_386_TLS_LDO_32:        // Alternate local-dynamic
      case elfcpp::R_386_TLS_IE:            // Initial-exec
      case elfcpp::R_386_TLS_IE_32:
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_LE:            // Local-exec
      case elfcpp::R_386_TLS_LE_32:
        return Symbol::TLS_REF;
  
      case elfcpp::R_386_COPY:
      case elfcpp::R_386_GLOB_DAT:
      case elfcpp::R_386_JUMP_SLOT:
      case elfcpp::R_386_RELATIVE:
      case elfcpp::R_386_IRELATIVE:
      case elfcpp::R_386_TLS_TPOFF:
      case elfcpp::R_386_TLS_DTPMOD32:
      case elfcpp::R_386_TLS_DTPOFF32:
      case elfcpp::R_386_TLS_TPOFF32:
      case elfcpp::R_386_TLS_DESC:
      case elfcpp::R_386_32PLT:
      case elfcpp::R_386_TLS_GD_32:
      case elfcpp::R_386_TLS_GD_PUSH:
      case elfcpp::R_386_TLS_GD_CALL:
      case elfcpp::R_386_TLS_GD_POP:
      case elfcpp::R_386_TLS_LDM_32:
      case elfcpp::R_386_TLS_LDM_PUSH:
      case elfcpp::R_386_TLS_LDM_CALL:
      case elfcpp::R_386_TLS_LDM_POP:
      case elfcpp::R_386_USED_BY_INTEL_200:
      default:
        // Not expected.  We will give an error later.
        return 0;
      }
  }
  
  // Report an unsupported relocation against a local symbol.
  
  void
  Target_i386::Scan::unsupported_reloc_local(Sized_relobj_file<32, false>* object,
  					   unsigned int r_type)
  {
    gold_error(_("%s: unsupported reloc %u against local symbol"),
  	     object->name().c_str(), r_type);
  }
  
  // Return whether we need to make a PLT entry for a relocation of a
  // given type against a STT_GNU_IFUNC symbol.
  
  bool
  Target_i386::Scan::reloc_needs_plt_for_ifunc(
      Sized_relobj_file<32, false>* object,
      unsigned int r_type)
  {
    int flags = Scan::get_reference_flags(r_type);
    if (flags & Symbol::TLS_REF)
      gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
  	       object->name().c_str(), r_type);
    return flags != 0;
  }
  
  // Scan a relocation for a local symbol.
  
  inline void
  Target_i386::Scan::local(Symbol_table* symtab,
  			 Layout* layout,
  			 Target_i386* target,
  			 Sized_relobj_file<32, false>* object,
  			 unsigned int data_shndx,
  			 Output_section* output_section,
  			 const elfcpp::Rel<32, false>& reloc,
  			 unsigned int r_type,
  			 const elfcpp::Sym<32, false>& lsym,
  			 bool is_discarded)
  {
    if (is_discarded)
      return;
  
    // A local STT_GNU_IFUNC symbol may require a PLT entry.
    if (lsym.get_st_type() == elfcpp::STT_GNU_IFUNC
        && this->reloc_needs_plt_for_ifunc(object, r_type))
      {
        unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
        target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
      }
  
    switch (r_type)
      {
      case elfcpp::R_386_NONE:
      case elfcpp::R_386_GNU_VTINHERIT:
      case elfcpp::R_386_GNU_VTENTRY:
        break;
  
      case elfcpp::R_386_32:
        // If building a shared library (or a position-independent
        // executable), we need to create a dynamic relocation for
        // this location. The relocation applied at link time will
        // apply the link-time value, so we flag the location with
        // an R_386_RELATIVE relocation so the dynamic loader can
        // relocate it easily.
        if (parameters->options().output_is_position_independent())
  	{
  	  Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  	  unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  	  rel_dyn->add_local_relative(object, r_sym, elfcpp::R_386_RELATIVE,
  				      output_section, data_shndx,
  				      reloc.get_r_offset());
  	}
        break;
  
      case elfcpp::R_386_16:
      case elfcpp::R_386_8:
        // If building a shared library (or a position-independent
        // executable), we need to create a dynamic relocation for
        // this location. Because the addend needs to remain in the
        // data section, we need to be careful not to apply this
        // relocation statically.
        if (parameters->options().output_is_position_independent())
  	{
  	  Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  	  unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  	  if (lsym.get_st_type() != elfcpp::STT_SECTION)
  	    rel_dyn->add_local(object, r_sym, r_type, output_section,
  			       data_shndx, reloc.get_r_offset());
  	  else
  	    {
  	      gold_assert(lsym.get_st_value() == 0);
  	      unsigned int shndx = lsym.get_st_shndx();
  	      bool is_ordinary;
  	      shndx = object->adjust_sym_shndx(r_sym, shndx,
  					       &is_ordinary);
  	      if (!is_ordinary)
  		object->error(_("section symbol %u has bad shndx %u"),
  			      r_sym, shndx);
  	      else
  		rel_dyn->add_local_section(object, shndx,
  					   r_type, output_section,
  					   data_shndx, reloc.get_r_offset());
  	    }
  	}
        break;
  
      case elfcpp::R_386_PC32:
      case elfcpp::R_386_PC16:
      case elfcpp::R_386_PC8:
        break;
  
      case elfcpp::R_386_PLT32:
        // Since we know this is a local symbol, we can handle this as a
        // PC32 reloc.
        break;
  
      case elfcpp::R_386_GOTOFF:
      case elfcpp::R_386_GOTPC:
        // We need a GOT section.
        target->got_section(symtab, layout);
        break;
  
      case elfcpp::R_386_GOT32:
        {
  	// The symbol requires a GOT entry.
  	Output_data_got<32, false>* got = target->got_section(symtab, layout);
  	unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  
  	// For a STT_GNU_IFUNC symbol we want the PLT offset.  That
  	// lets function pointers compare correctly with shared
  	// libraries.  Otherwise we would need an IRELATIVE reloc.
  	bool is_new;
  	if (lsym.get_st_type() == elfcpp::STT_GNU_IFUNC)
  	  is_new = got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
  	else
  	  is_new = got->add_local(object, r_sym, GOT_TYPE_STANDARD);
  	if (is_new)
  	  {
  	    // If we are generating a shared object, we need to add a
  	    // dynamic RELATIVE relocation for this symbol's GOT entry.
  	    if (parameters->options().output_is_position_independent())
  	      {
  		Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		unsigned int got_offset =
  		  object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
  		rel_dyn->add_local_relative(object, r_sym,
  					    elfcpp::R_386_RELATIVE,
  					    got, got_offset);
  	      }
  	  }
        }
        break;
  
        // These are relocations which should only be seen by the
        // dynamic linker, and should never be seen here.
      case elfcpp::R_386_COPY:
      case elfcpp::R_386_GLOB_DAT:
      case elfcpp::R_386_JUMP_SLOT:
      case elfcpp::R_386_RELATIVE:
      case elfcpp::R_386_IRELATIVE:
      case elfcpp::R_386_TLS_TPOFF:
      case elfcpp::R_386_TLS_DTPMOD32:
      case elfcpp::R_386_TLS_DTPOFF32:
      case elfcpp::R_386_TLS_TPOFF32:
      case elfcpp::R_386_TLS_DESC:
        gold_error(_("%s: unexpected reloc %u in object file"),
  		 object->name().c_str(), r_type);
        break;
  
        // These are initial TLS relocs, which are expected when
        // linking.
      case elfcpp::R_386_TLS_GD:            // Global-dynamic
      case elfcpp::R_386_TLS_GOTDESC:       // Global-dynamic (from ~oliva url)
      case elfcpp::R_386_TLS_DESC_CALL:
      case elfcpp::R_386_TLS_LDM:           // Local-dynamic
      case elfcpp::R_386_TLS_LDO_32:        // Alternate local-dynamic
      case elfcpp::R_386_TLS_IE:            // Initial-exec
      case elfcpp::R_386_TLS_IE_32:
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_LE:            // Local-exec
      case elfcpp::R_386_TLS_LE_32:
        {
  	bool output_is_shared = parameters->options().shared();
  	const tls::Tls_optimization optimized_type
  	    = Target_i386::optimize_tls_reloc(!output_is_shared, r_type);
  	switch (r_type)
  	  {
  	  case elfcpp::R_386_TLS_GD:          // Global-dynamic
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// Create a pair of GOT entries for the module index and
  		// dtv-relative offset.
  		Output_data_got<32, false>* got
  		    = target->got_section(symtab, layout);
  		unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  		unsigned int shndx = lsym.get_st_shndx();
  		bool is_ordinary;
  		shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
  		if (!is_ordinary)
  		  object->error(_("local symbol %u has bad shndx %u"),
  			      r_sym, shndx);
  		else
  		  got->add_local_pair_with_rel(object, r_sym, shndx,
  					       GOT_TYPE_TLS_PAIR,
  					       target->rel_dyn_section(layout),
  					       elfcpp::R_386_TLS_DTPMOD32);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_local(object, r_type);
  	    break;
  
  	  case elfcpp::R_386_TLS_GOTDESC:     // Global-dynamic (from ~oliva)
  	    target->define_tls_base_symbol(symtab, layout);
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// Create a double GOT entry with an R_386_TLS_DESC
  		// reloc.  The R_386_TLS_DESC reloc is resolved
  		// lazily, so the GOT entry needs to be in an area in
  		// .got.plt, not .got.  Call got_section to make sure
  		// the section has been created.
  		target->got_section(symtab, layout);
  		Output_data_got<32, false>* got = target->got_tlsdesc_section();
  		unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  		if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC))
  		  {
  		    unsigned int got_offset = got->add_constant(0);
  		    // The local symbol value is stored in the second
  		    // GOT entry.
  		    got->add_local(object, r_sym, GOT_TYPE_TLS_DESC);
  		    // That set the GOT offset of the local symbol to
  		    // point to the second entry, but we want it to
  		    // point to the first.
  		    object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC,
  						 got_offset);
  		    Reloc_section* rt = target->rel_tls_desc_section(layout);
  		    rt->add_absolute(elfcpp::R_386_TLS_DESC, got, got_offset);
  		  }
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_local(object, r_type);
  	    break;
  
  	  case elfcpp::R_386_TLS_DESC_CALL:
  	    break;
  
  	  case elfcpp::R_386_TLS_LDM:         // Local-dynamic
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// Create a GOT entry for the module index.
  		target->got_mod_index_entry(symtab, layout, object);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_local(object, r_type);
  	    break;
  
  	  case elfcpp::R_386_TLS_LDO_32:      // Alternate local-dynamic
  	    break;
  
  	  case elfcpp::R_386_TLS_IE:          // Initial-exec
  	  case elfcpp::R_386_TLS_IE_32:
  	  case elfcpp::R_386_TLS_GOTIE:
  	    layout->set_has_static_tls();
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// For the R_386_TLS_IE relocation, we need to create a
  		// dynamic relocation when building a shared library.
  		if (r_type == elfcpp::R_386_TLS_IE
  		    && parameters->options().shared())
  		  {
  		    Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		    unsigned int r_sym
  			= elfcpp::elf_r_sym<32>(reloc.get_r_info());
  		    rel_dyn->add_local_relative(object, r_sym,
  						elfcpp::R_386_RELATIVE,
  						output_section, data_shndx,
  						reloc.get_r_offset());
  		  }
  		// Create a GOT entry for the tp-relative offset.
  		Output_data_got<32, false>* got
  		    = target->got_section(symtab, layout);
  		unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  		unsigned int dyn_r_type = (r_type == elfcpp::R_386_TLS_IE_32
  					   ? elfcpp::R_386_TLS_TPOFF32
  					   : elfcpp::R_386_TLS_TPOFF);
  		unsigned int got_type = (r_type == elfcpp::R_386_TLS_IE_32
  					 ? GOT_TYPE_TLS_OFFSET
  					 : GOT_TYPE_TLS_NOFFSET);
  		got->add_local_with_rel(object, r_sym, got_type,
  					target->rel_dyn_section(layout),
  					dyn_r_type);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_local(object, r_type);
  	    break;
  
  	  case elfcpp::R_386_TLS_LE:          // Local-exec
  	  case elfcpp::R_386_TLS_LE_32:
  	    layout->set_has_static_tls();
  	    if (output_is_shared)
  	      {
  		// We need to create a dynamic relocation.
  		gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
  		unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info());
  		unsigned int dyn_r_type = (r_type == elfcpp::R_386_TLS_LE_32
  					   ? elfcpp::R_386_TLS_TPOFF32
  					   : elfcpp::R_386_TLS_TPOFF);
  		Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		rel_dyn->add_local(object, r_sym, dyn_r_type, output_section,
  				   data_shndx, reloc.get_r_offset());
  	      }
  	    break;
  
  	  default:
  	    gold_unreachable();
  	  }
        }
        break;
  
      case elfcpp::R_386_32PLT:
      case elfcpp::R_386_TLS_GD_32:
      case elfcpp::R_386_TLS_GD_PUSH:
      case elfcpp::R_386_TLS_GD_CALL:
      case elfcpp::R_386_TLS_GD_POP:
      case elfcpp::R_386_TLS_LDM_32:
      case elfcpp::R_386_TLS_LDM_PUSH:
      case elfcpp::R_386_TLS_LDM_CALL:
      case elfcpp::R_386_TLS_LDM_POP:
      case elfcpp::R_386_USED_BY_INTEL_200:
      default:
        unsupported_reloc_local(object, r_type);
        break;
      }
  }
  
  // Report an unsupported relocation against a global symbol.
  
  void
  Target_i386::Scan::unsupported_reloc_global(
      Sized_relobj_file<32, false>* object,
      unsigned int r_type,
      Symbol* gsym)
  {
    gold_error(_("%s: unsupported reloc %u against global symbol %s"),
  	     object->name().c_str(), r_type, gsym->demangled_name().c_str());
  }
  
  inline bool
  Target_i386::Scan::possible_function_pointer_reloc(unsigned int r_type)
  {
    switch (r_type)
      {
      case elfcpp::R_386_32:
      case elfcpp::R_386_16:
      case elfcpp::R_386_8:
      case elfcpp::R_386_GOTOFF:
      case elfcpp::R_386_GOT32:
        {
  	return true;
        }
      default:
        return false;
      }
    return false;
  }
  
  inline bool
  Target_i386::Scan::local_reloc_may_be_function_pointer(
    Symbol_table* ,
    Layout* ,
    Target_i386* ,
    Sized_relobj_file<32, false>* ,
    unsigned int ,
    Output_section* ,
    const elfcpp::Rel<32, false>& ,
    unsigned int r_type,
    const elfcpp::Sym<32, false>&)
  {
    return possible_function_pointer_reloc(r_type);
  }
  
  inline bool
  Target_i386::Scan::global_reloc_may_be_function_pointer(
    Symbol_table* ,
    Layout* ,
    Target_i386* ,
    Sized_relobj_file<32, false>* ,
    unsigned int ,
    Output_section* ,
    const elfcpp::Rel<32, false>& ,
    unsigned int r_type,
    Symbol*)
  {
    return possible_function_pointer_reloc(r_type);
  }
  
  // Scan a relocation for a global symbol.
  
  inline void
  Target_i386::Scan::global(Symbol_table* symtab,
  				 Layout* layout,
  				 Target_i386* target,
  				 Sized_relobj_file<32, false>* object,
  				 unsigned int data_shndx,
  				 Output_section* output_section,
  				 const elfcpp::Rel<32, false>& reloc,
  				 unsigned int r_type,
  				 Symbol* gsym)
  {
    // A STT_GNU_IFUNC symbol may require a PLT entry.
    if (gsym->type() == elfcpp::STT_GNU_IFUNC
        && this->reloc_needs_plt_for_ifunc(object, r_type))
      target->make_plt_entry(symtab, layout, gsym);
  
    switch (r_type)
      {
      case elfcpp::R_386_NONE:
      case elfcpp::R_386_GNU_VTINHERIT:
      case elfcpp::R_386_GNU_VTENTRY:
        break;
  
      case elfcpp::R_386_32:
      case elfcpp::R_386_16:
      case elfcpp::R_386_8:
        {
  	// Make a PLT entry if necessary.
  	if (gsym->needs_plt_entry())
  	  {
  	    target->make_plt_entry(symtab, layout, gsym);
  	    // Since this is not a PC-relative relocation, we may be
  	    // taking the address of a function. In that case we need to
  	    // set the entry in the dynamic symbol table to the address of
  	    // the PLT entry.
  	    if (gsym->is_from_dynobj() && !parameters->options().shared())
  	      gsym->set_needs_dynsym_value();
  	  }
  	// Make a dynamic relocation if necessary.
  	if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
  	  {
  	    if (!parameters->options().output_is_position_independent()
  		&& gsym->may_need_copy_reloc())
  	      {
  		target->copy_reloc(symtab, layout, object,
  				   data_shndx, output_section, gsym, reloc);
  	      }
  	    else if (r_type == elfcpp::R_386_32
  		     && gsym->type() == elfcpp::STT_GNU_IFUNC
  		     && gsym->can_use_relative_reloc(false)
  		     && !gsym->is_from_dynobj()
  		     && !gsym->is_undefined()
  		     && !gsym->is_preemptible())
  	      {
  		// Use an IRELATIVE reloc for a locally defined
  		// STT_GNU_IFUNC symbol.  This makes a function
  		// address in a PIE executable match the address in a
  		// shared library that it links against.
  		Reloc_section* rel_dyn = target->rel_irelative_section(layout);
  		rel_dyn->add_symbolless_global_addend(gsym,
  						      elfcpp::R_386_IRELATIVE,
  						      output_section,
  						      object, data_shndx,
  						      reloc.get_r_offset());
  	      }
  	    else if (r_type == elfcpp::R_386_32
  		     && gsym->can_use_relative_reloc(false))
  	      {
  		Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		rel_dyn->add_global_relative(gsym, elfcpp::R_386_RELATIVE,
  					     output_section, object,
  					     data_shndx, reloc.get_r_offset());
  	      }
  	    else
  	      {
  		Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		rel_dyn->add_global(gsym, r_type, output_section, object,
  				    data_shndx, reloc.get_r_offset());
  	      }
  	  }
        }
        break;
  
      case elfcpp::R_386_PC32:
      case elfcpp::R_386_PC16:
      case elfcpp::R_386_PC8:
        {
  	// Make a PLT entry if necessary.
  	if (gsym->needs_plt_entry())
  	  {
  	    // These relocations are used for function calls only in
  	    // non-PIC code.  For a 32-bit relocation in a shared library,
  	    // we'll need a text relocation anyway, so we can skip the
  	    // PLT entry and let the dynamic linker bind the call directly
  	    // to the target.  For smaller relocations, we should use a
  	    // PLT entry to ensure that the call can reach.
  	    if (!parameters->options().shared()
  		|| r_type != elfcpp::R_386_PC32)
  	      target->make_plt_entry(symtab, layout, gsym);
  	  }
  	// Make a dynamic relocation if necessary.
  	if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
  	  {
  	    if (parameters->options().output_is_executable()
  		&& gsym->may_need_copy_reloc())
  	      {
  		target->copy_reloc(symtab, layout, object,
  				   data_shndx, output_section, gsym, reloc);
  	      }
  	    else
  	      {
  		Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		rel_dyn->add_global(gsym, r_type, output_section, object,
  				    data_shndx, reloc.get_r_offset());
  	      }
  	  }
        }
        break;
  
      case elfcpp::R_386_GOT32:
        {
  	// The symbol requires a GOT entry.
  	Output_data_got<32, false>* got = target->got_section(symtab, layout);
  	if (gsym->final_value_is_known())
  	  {
  	    // For a STT_GNU_IFUNC symbol we want the PLT address.
  	    if (gsym->type() == elfcpp::STT_GNU_IFUNC)
  	      got->add_global_plt(gsym, GOT_TYPE_STANDARD);
  	    else
  	      got->add_global(gsym, GOT_TYPE_STANDARD);
  	  }
  	else
  	  {
  	    // If this symbol is not fully resolved, we need to add a
  	    // GOT entry with a dynamic relocation.
  	    Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  
  	    // Use a GLOB_DAT rather than a RELATIVE reloc if:
  	    //
  	    // 1) The symbol may be defined in some other module.
  	    //
  	    // 2) We are building a shared library and this is a
  	    // protected symbol; using GLOB_DAT means that the dynamic
  	    // linker can use the address of the PLT in the main
  	    // executable when appropriate so that function address
  	    // comparisons work.
  	    //
  	    // 3) This is a STT_GNU_IFUNC symbol in position dependent
  	    // code, again so that function address comparisons work.
  	    if (gsym->is_from_dynobj()
  		|| gsym->is_undefined()
  		|| gsym->is_preemptible()
  		|| (gsym->visibility() == elfcpp::STV_PROTECTED
  		    && parameters->options().shared())
  		|| (gsym->type() == elfcpp::STT_GNU_IFUNC
  		    && parameters->options().output_is_position_independent()))
  	      got->add_global_with_rel(gsym, GOT_TYPE_STANDARD,
  				       rel_dyn, elfcpp::R_386_GLOB_DAT);
  	    else
  	      {
  		// For a STT_GNU_IFUNC symbol we want to write the PLT
  		// offset into the GOT, so that function pointer
  		// comparisons work correctly.
  		bool is_new;
  		if (gsym->type() != elfcpp::STT_GNU_IFUNC)
  		  is_new = got->add_global(gsym, GOT_TYPE_STANDARD);
  		else
  		  {
  		    is_new = got->add_global_plt(gsym, GOT_TYPE_STANDARD);
  		    // Tell the dynamic linker to use the PLT address
  		    // when resolving relocations.
  		    if (gsym->is_from_dynobj()
  			&& !parameters->options().shared())
  		      gsym->set_needs_dynsym_value();
  		  }
  		if (is_new)
  		  {
  		    unsigned int got_off = gsym->got_offset(GOT_TYPE_STANDARD);
  		    rel_dyn->add_global_relative(gsym, elfcpp::R_386_RELATIVE,
  						 got, got_off);
  		  }
  	      }
  	  }
        }
        break;
  
      case elfcpp::R_386_PLT32:
        // If the symbol is fully resolved, this is just a PC32 reloc.
        // Otherwise we need a PLT entry.
        if (gsym->final_value_is_known())
  	break;
        // If building a shared library, we can also skip the PLT entry
        // if the symbol is defined in the output file and is protected
        // or hidden.
        if (gsym->is_defined()
  	  && !gsym->is_from_dynobj()
  	  && !gsym->is_preemptible())
  	break;
        target->make_plt_entry(symtab, layout, gsym);
        break;
  
      case elfcpp::R_386_GOTOFF:
      case elfcpp::R_386_GOTPC:
        // We need a GOT section.
        target->got_section(symtab, layout);
        break;
  
        // These are relocations which should only be seen by the
        // dynamic linker, and should never be seen here.
      case elfcpp::R_386_COPY:
      case elfcpp::R_386_GLOB_DAT:
      case elfcpp::R_386_JUMP_SLOT:
      case elfcpp::R_386_RELATIVE:
      case elfcpp::R_386_IRELATIVE:
      case elfcpp::R_386_TLS_TPOFF:
      case elfcpp::R_386_TLS_DTPMOD32:
      case elfcpp::R_386_TLS_DTPOFF32:
      case elfcpp::R_386_TLS_TPOFF32:
      case elfcpp::R_386_TLS_DESC:
        gold_error(_("%s: unexpected reloc %u in object file"),
  		 object->name().c_str(), r_type);
        break;
  
        // These are initial tls relocs, which are expected when
        // linking.
      case elfcpp::R_386_TLS_GD:            // Global-dynamic
      case elfcpp::R_386_TLS_GOTDESC:       // Global-dynamic (from ~oliva url)
      case elfcpp::R_386_TLS_DESC_CALL:
      case elfcpp::R_386_TLS_LDM:           // Local-dynamic
      case elfcpp::R_386_TLS_LDO_32:        // Alternate local-dynamic
      case elfcpp::R_386_TLS_IE:            // Initial-exec
      case elfcpp::R_386_TLS_IE_32:
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_LE:            // Local-exec
      case elfcpp::R_386_TLS_LE_32:
        {
  	const bool is_final = gsym->final_value_is_known();
  	const tls::Tls_optimization optimized_type
  	    = Target_i386::optimize_tls_reloc(is_final, r_type);
  	switch (r_type)
  	  {
  	  case elfcpp::R_386_TLS_GD:          // Global-dynamic
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// Create a pair of GOT entries for the module index and
  		// dtv-relative offset.
  		Output_data_got<32, false>* got
  		    = target->got_section(symtab, layout);
  		got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
  					     target->rel_dyn_section(layout),
  					     elfcpp::R_386_TLS_DTPMOD32,
  					     elfcpp::R_386_TLS_DTPOFF32);
  	      }
  	    else if (optimized_type == tls::TLSOPT_TO_IE)
  	      {
  		// Create a GOT entry for the tp-relative offset.
  		Output_data_got<32, false>* got
  		    = target->got_section(symtab, layout);
  		got->add_global_with_rel(gsym, GOT_TYPE_TLS_NOFFSET,
  					 target->rel_dyn_section(layout),
  					 elfcpp::R_386_TLS_TPOFF);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_global(object, r_type, gsym);
  	    break;
  
  	  case elfcpp::R_386_TLS_GOTDESC:     // Global-dynamic (~oliva url)
  	    target->define_tls_base_symbol(symtab, layout);
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// Create a double GOT entry with an R_386_TLS_DESC
  		// reloc.  The R_386_TLS_DESC reloc is resolved
  		// lazily, so the GOT entry needs to be in an area in
  		// .got.plt, not .got.  Call got_section to make sure
  		// the section has been created.
  		target->got_section(symtab, layout);
  		Output_data_got<32, false>* got = target->got_tlsdesc_section();
  		Reloc_section* rt = target->rel_tls_desc_section(layout);
  		got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, rt,
  					     elfcpp::R_386_TLS_DESC, 0);
  	      }
  	    else if (optimized_type == tls::TLSOPT_TO_IE)
  	      {
  		// Create a GOT entry for the tp-relative offset.
  		Output_data_got<32, false>* got
  		    = target->got_section(symtab, layout);
  		got->add_global_with_rel(gsym, GOT_TYPE_TLS_NOFFSET,
  					 target->rel_dyn_section(layout),
  					 elfcpp::R_386_TLS_TPOFF);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_global(object, r_type, gsym);
  	    break;
  
  	  case elfcpp::R_386_TLS_DESC_CALL:
  	    break;
  
  	  case elfcpp::R_386_TLS_LDM:         // Local-dynamic
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// Create a GOT entry for the module index.
  		target->got_mod_index_entry(symtab, layout, object);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_global(object, r_type, gsym);
  	    break;
  
  	  case elfcpp::R_386_TLS_LDO_32:      // Alternate local-dynamic
  	    break;
  
  	  case elfcpp::R_386_TLS_IE:          // Initial-exec
  	  case elfcpp::R_386_TLS_IE_32:
  	  case elfcpp::R_386_TLS_GOTIE:
  	    layout->set_has_static_tls();
  	    if (optimized_type == tls::TLSOPT_NONE)
  	      {
  		// For the R_386_TLS_IE relocation, we need to create a
  		// dynamic relocation when building a shared library.
  		if (r_type == elfcpp::R_386_TLS_IE
  		    && parameters->options().shared())
  		  {
  		    Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		    rel_dyn->add_global_relative(gsym, elfcpp::R_386_RELATIVE,
  						 output_section, object,
  						 data_shndx,
  						 reloc.get_r_offset());
  		  }
  		// Create a GOT entry for the tp-relative offset.
  		Output_data_got<32, false>* got
  		    = target->got_section(symtab, layout);
  		unsigned int dyn_r_type = (r_type == elfcpp::R_386_TLS_IE_32
  					   ? elfcpp::R_386_TLS_TPOFF32
  					   : elfcpp::R_386_TLS_TPOFF);
  		unsigned int got_type = (r_type == elfcpp::R_386_TLS_IE_32
  					 ? GOT_TYPE_TLS_OFFSET
  					 : GOT_TYPE_TLS_NOFFSET);
  		got->add_global_with_rel(gsym, got_type,
  					 target->rel_dyn_section(layout),
  					 dyn_r_type);
  	      }
  	    else if (optimized_type != tls::TLSOPT_TO_LE)
  	      unsupported_reloc_global(object, r_type, gsym);
  	    break;
  
  	  case elfcpp::R_386_TLS_LE:          // Local-exec
  	  case elfcpp::R_386_TLS_LE_32:
  	    layout->set_has_static_tls();
  	    if (parameters->options().shared())
  	      {
  		// We need to create a dynamic relocation.
  		unsigned int dyn_r_type = (r_type == elfcpp::R_386_TLS_LE_32
  					   ? elfcpp::R_386_TLS_TPOFF32
  					   : elfcpp::R_386_TLS_TPOFF);
  		Reloc_section* rel_dyn = target->rel_dyn_section(layout);
  		rel_dyn->add_global(gsym, dyn_r_type, output_section, object,
  				    data_shndx, reloc.get_r_offset());
  	      }
  	    break;
  
  	  default:
  	    gold_unreachable();
  	  }
        }
        break;
  
      case elfcpp::R_386_32PLT:
      case elfcpp::R_386_TLS_GD_32:
      case elfcpp::R_386_TLS_GD_PUSH:
      case elfcpp::R_386_TLS_GD_CALL:
      case elfcpp::R_386_TLS_GD_POP:
      case elfcpp::R_386_TLS_LDM_32:
      case elfcpp::R_386_TLS_LDM_PUSH:
      case elfcpp::R_386_TLS_LDM_CALL:
      case elfcpp::R_386_TLS_LDM_POP:
      case elfcpp::R_386_USED_BY_INTEL_200:
      default:
        unsupported_reloc_global(object, r_type, gsym);
        break;
      }
  }
  
  // Process relocations for gc.
  
  void
  Target_i386::gc_process_relocs(Symbol_table* symtab,
  				      Layout* layout,
  				      Sized_relobj_file<32, false>* object,
  				      unsigned int data_shndx,
  				      unsigned int,
  				      const unsigned char* prelocs,
  				      size_t reloc_count,
  				      Output_section* output_section,
  				      bool needs_special_offset_handling,
  				      size_t local_symbol_count,
  				      const unsigned char* plocal_symbols)
  {
    gold::gc_process_relocs<32, false, Target_i386, elfcpp::SHT_REL,
  			  Target_i386::Scan,
  			  Target_i386::Relocatable_size_for_reloc>(
      symtab,
      layout,
      this,
      object,
      data_shndx,
      prelocs,
      reloc_count,
      output_section,
      needs_special_offset_handling,
      local_symbol_count,
      plocal_symbols);
  }
  
  // Scan relocations for a section.
  
  void
  Target_i386::scan_relocs(Symbol_table* symtab,
  				Layout* layout,
  				Sized_relobj_file<32, false>* object,
  				unsigned int data_shndx,
  				unsigned int sh_type,
  				const unsigned char* prelocs,
  				size_t reloc_count,
  				Output_section* output_section,
  				bool needs_special_offset_handling,
  				size_t local_symbol_count,
  				const unsigned char* plocal_symbols)
  {
    if (sh_type == elfcpp::SHT_RELA)
      {
        gold_error(_("%s: unsupported RELA reloc section"),
  		 object->name().c_str());
        return;
      }
  
    gold::scan_relocs<32, false, Target_i386, elfcpp::SHT_REL,
  		    Target_i386::Scan>(
      symtab,
      layout,
      this,
      object,
      data_shndx,
      prelocs,
      reloc_count,
      output_section,
      needs_special_offset_handling,
      local_symbol_count,
      plocal_symbols);
  }
  
  // Finalize the sections.
  
  void
  Target_i386::do_finalize_sections(
      Layout* layout,
      const Input_objects*,
      Symbol_table* symtab)
  {
    const Reloc_section* rel_plt = (this->plt_ == NULL
  				  ? NULL
  				  : this->plt_->rel_plt());
    layout->add_target_dynamic_tags(true, this->got_plt_, rel_plt,
  				  this->rel_dyn_, true, false);
  
    // Emit any relocs we saved in an attempt to avoid generating COPY
    // relocs.
    if (this->copy_relocs_.any_saved_relocs())
      this->copy_relocs_.emit(this->rel_dyn_section(layout));
  
    // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of
    // the .got.plt section.
    Symbol* sym = this->global_offset_table_;
    if (sym != NULL)
      {
        uint32_t data_size = this->got_plt_->current_data_size();
        symtab->get_sized_symbol<32>(sym)->set_symsize(data_size);
      }
  
    if (parameters->doing_static_link()
        && (this->plt_ == NULL || !this->plt_->has_irelative_section()))
      {
        // If linking statically, make sure that the __rel_iplt symbols
        // were defined if necessary, even if we didn't create a PLT.
        static const Define_symbol_in_segment syms[] =
  	{
  	  {
  	    "__rel_iplt_start",		// name
  	    elfcpp::PT_LOAD,		// segment_type
  	    elfcpp::PF_W,		// segment_flags_set
  	    elfcpp::PF(0),		// segment_flags_clear
  	    0,				// value
  	    0,				// size
  	    elfcpp::STT_NOTYPE,		// type
  	    elfcpp::STB_GLOBAL,		// binding
  	    elfcpp::STV_HIDDEN,		// visibility
  	    0,				// nonvis
  	    Symbol::SEGMENT_START,	// offset_from_base
  	    true			// only_if_ref
  	  },
  	  {
  	    "__rel_iplt_end",		// name
  	    elfcpp::PT_LOAD,		// segment_type
  	    elfcpp::PF_W,		// segment_flags_set
  	    elfcpp::PF(0),		// segment_flags_clear
  	    0,				// value
  	    0,				// size
  	    elfcpp::STT_NOTYPE,		// type
  	    elfcpp::STB_GLOBAL,		// binding
  	    elfcpp::STV_HIDDEN,		// visibility
  	    0,				// nonvis
  	    Symbol::SEGMENT_START,	// offset_from_base
  	    true			// only_if_ref
  	  }
  	};
  
        symtab->define_symbols(layout, 2, syms,
  			     layout->script_options()->saw_sections_clause());
      }
  }
  
  // Return whether a direct absolute static relocation needs to be applied.
  // In cases where Scan::local() or Scan::global() has created
  // a dynamic relocation other than R_386_RELATIVE, the addend
  // of the relocation is carried in the data, and we must not
  // apply the static relocation.
  
  inline bool
  Target_i386::Relocate::should_apply_static_reloc(const Sized_symbol<32>* gsym,
  						 unsigned int r_type,
  						 bool is_32bit,
  						 Output_section* output_section)
  {
    // If the output section is not allocated, then we didn't call
    // scan_relocs, we didn't create a dynamic reloc, and we must apply
    // the reloc here.
    if ((output_section->flags() & elfcpp::SHF_ALLOC) == 0)
      return true;
  
    int ref_flags = Scan::get_reference_flags(r_type);
  
    // For local symbols, we will have created a non-RELATIVE dynamic
    // relocation only if (a) the output is position independent,
    // (b) the relocation is absolute (not pc- or segment-relative), and
    // (c) the relocation is not 32 bits wide.
    if (gsym == NULL)
      return !(parameters->options().output_is_position_independent()
  	     && (ref_flags & Symbol::ABSOLUTE_REF)
  	     && !is_32bit);
  
    // For global symbols, we use the same helper routines used in the
    // scan pass.  If we did not create a dynamic relocation, or if we
    // created a RELATIVE dynamic relocation, we should apply the static
    // relocation.
    bool has_dyn = gsym->needs_dynamic_reloc(ref_flags);
    bool is_rel = (ref_flags & Symbol::ABSOLUTE_REF)
  		&& gsym->can_use_relative_reloc(ref_flags
  						& Symbol::FUNCTION_CALL);
    return !has_dyn || is_rel;
  }
  
  // Perform a relocation.
  
  inline bool
  Target_i386::Relocate::relocate(const Relocate_info<32, false>* relinfo,
  				       Target_i386* target,
  				       Output_section* output_section,
  				       size_t relnum,
  				       const elfcpp::Rel<32, false>& rel,
  				       unsigned int r_type,
  				       const Sized_symbol<32>* gsym,
  				       const Symbol_value<32>* psymval,
  				       unsigned char* view,
  				       elfcpp::Elf_types<32>::Elf_Addr address,
  				       section_size_type view_size)
  {
    if (this->skip_call_tls_get_addr_)
      {
        if ((r_type != elfcpp::R_386_PLT32
  	   && r_type != elfcpp::R_386_PC32)
  	  || gsym == NULL
  	  || strcmp(gsym->name(), "___tls_get_addr") != 0)
  	gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			       _("missing expected TLS relocation"));
        else
  	{
  	  this->skip_call_tls_get_addr_ = false;
  	  return false;
  	}
      }
  
    if (view == NULL)
      return true;
  
    const Sized_relobj_file<32, false>* object = relinfo->object;
  
    // Pick the value to use for symbols defined in shared objects.
    Symbol_value<32> symval;
    if (gsym != NULL
        && gsym->type() == elfcpp::STT_GNU_IFUNC
        && r_type == elfcpp::R_386_32
        && gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))
        && gsym->can_use_relative_reloc(false)
        && !gsym->is_from_dynobj()
        && !gsym->is_undefined()
        && !gsym->is_preemptible())
      {
        // In this case we are generating a R_386_IRELATIVE reloc.  We
        // want to use the real value of the symbol, not the PLT offset.
      }
    else if (gsym != NULL
  	   && gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
      {
        symval.set_output_value(target->plt_address_for_global(gsym));
        psymval = &symval;
      }
    else if (gsym == NULL && psymval->is_ifunc_symbol())
      {
        unsigned int r_sym = elfcpp::elf_r_sym<32>(rel.get_r_info());
        if (object->local_has_plt_offset(r_sym))
  	{
  	  symval.set_output_value(target->plt_address_for_local(object, r_sym));
  	  psymval = &symval;
  	}
      }
  
    // Get the GOT offset if needed.
    // The GOT pointer points to the end of the GOT section.
    // We need to subtract the size of the GOT section to get
    // the actual offset to use in the relocation.
    bool have_got_offset = false;
    unsigned int got_offset = 0;
    switch (r_type)
      {
      case elfcpp::R_386_GOT32:
        if (gsym != NULL)
  	{
  	  gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
  	  got_offset = (gsym->got_offset(GOT_TYPE_STANDARD)
  			- target->got_size());
  	}
        else
  	{
  	  unsigned int r_sym = elfcpp::elf_r_sym<32>(rel.get_r_info());
  	  gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
  	  got_offset = (object->local_got_offset(r_sym, GOT_TYPE_STANDARD)
  			- target->got_size());
  	}
        have_got_offset = true;
        break;
  
      default:
        break;
      }
  
    switch (r_type)
      {
      case elfcpp::R_386_NONE:
      case elfcpp::R_386_GNU_VTINHERIT:
      case elfcpp::R_386_GNU_VTENTRY:
        break;
  
      case elfcpp::R_386_32:
        if (should_apply_static_reloc(gsym, r_type, true, output_section))
  	Relocate_functions<32, false>::rel32(view, object, psymval);
        break;
  
      case elfcpp::R_386_PC32:
        if (should_apply_static_reloc(gsym, r_type, true, output_section))
  	Relocate_functions<32, false>::pcrel32(view, object, psymval, address);
        break;
  
      case elfcpp::R_386_16:
        if (should_apply_static_reloc(gsym, r_type, false, output_section))
  	Relocate_functions<32, false>::rel16(view, object, psymval);
        break;
  
      case elfcpp::R_386_PC16:
        if (should_apply_static_reloc(gsym, r_type, false, output_section))
  	Relocate_functions<32, false>::pcrel16(view, object, psymval, address);
        break;
  
      case elfcpp::R_386_8:
        if (should_apply_static_reloc(gsym, r_type, false, output_section))
  	Relocate_functions<32, false>::rel8(view, object, psymval);
        break;
  
      case elfcpp::R_386_PC8:
        if (should_apply_static_reloc(gsym, r_type, false, output_section))
  	Relocate_functions<32, false>::pcrel8(view, object, psymval, address);
        break;
  
      case elfcpp::R_386_PLT32:
        gold_assert(gsym == NULL
  		  || gsym->has_plt_offset()
  		  || gsym->final_value_is_known()
  		  || (gsym->is_defined()
  		      && !gsym->is_from_dynobj()
  		      && !gsym->is_preemptible()));
        Relocate_functions<32, false>::pcrel32(view, object, psymval, address);
        break;
  
      case elfcpp::R_386_GOT32:
        gold_assert(have_got_offset);
        Relocate_functions<32, false>::rel32(view, got_offset);
        break;
  
      case elfcpp::R_386_GOTOFF:
        {
  	elfcpp::Elf_types<32>::Elf_Addr value;
  	value = (psymval->value(object, 0)
  		 - target->got_plt_section()->address());
  	Relocate_functions<32, false>::rel32(view, value);
        }
        break;
  
      case elfcpp::R_386_GOTPC:
        {
  	elfcpp::Elf_types<32>::Elf_Addr value;
  	value = target->got_plt_section()->address();
  	Relocate_functions<32, false>::pcrel32(view, value, address);
        }
        break;
  
      case elfcpp::R_386_COPY:
      case elfcpp::R_386_GLOB_DAT:
      case elfcpp::R_386_JUMP_SLOT:
      case elfcpp::R_386_RELATIVE:
      case elfcpp::R_386_IRELATIVE:
        // These are outstanding tls relocs, which are unexpected when
        // linking.
      case elfcpp::R_386_TLS_TPOFF:
      case elfcpp::R_386_TLS_DTPMOD32:
      case elfcpp::R_386_TLS_DTPOFF32:
      case elfcpp::R_386_TLS_TPOFF32:
      case elfcpp::R_386_TLS_DESC:
        gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			     _("unexpected reloc %u in object file"),
  			     r_type);
        break;
  
        // These are initial tls relocs, which are expected when
        // linking.
      case elfcpp::R_386_TLS_GD:             // Global-dynamic
      case elfcpp::R_386_TLS_GOTDESC:        // Global-dynamic (from ~oliva url)
      case elfcpp::R_386_TLS_DESC_CALL:
      case elfcpp::R_386_TLS_LDM:            // Local-dynamic
      case elfcpp::R_386_TLS_LDO_32:         // Alternate local-dynamic
      case elfcpp::R_386_TLS_IE:             // Initial-exec
      case elfcpp::R_386_TLS_IE_32:
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_LE:             // Local-exec
      case elfcpp::R_386_TLS_LE_32:
        this->relocate_tls(relinfo, target, relnum, rel, r_type, gsym, psymval,
  			 view, address, view_size);
        break;
  
      case elfcpp::R_386_32PLT:
      case elfcpp::R_386_TLS_GD_32:
      case elfcpp::R_386_TLS_GD_PUSH:
      case elfcpp::R_386_TLS_GD_CALL:
      case elfcpp::R_386_TLS_GD_POP:
      case elfcpp::R_386_TLS_LDM_32:
      case elfcpp::R_386_TLS_LDM_PUSH:
      case elfcpp::R_386_TLS_LDM_CALL:
      case elfcpp::R_386_TLS_LDM_POP:
      case elfcpp::R_386_USED_BY_INTEL_200:
      default:
        gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			     _("unsupported reloc %u"),
  			     r_type);
        break;
      }
  
    return true;
  }
  
  // Perform a TLS relocation.
  
  inline void
  Target_i386::Relocate::relocate_tls(const Relocate_info<32, false>* relinfo,
  				    Target_i386* target,
  				    size_t relnum,
  				    const elfcpp::Rel<32, false>& rel,
  				    unsigned int r_type,
  				    const Sized_symbol<32>* gsym,
  				    const Symbol_value<32>* psymval,
  				    unsigned char* view,
  				    elfcpp::Elf_types<32>::Elf_Addr,
  				    section_size_type view_size)
  {
    Output_segment* tls_segment = relinfo->layout->tls_segment();
  
    const Sized_relobj_file<32, false>* object = relinfo->object;
  
    elfcpp::Elf_types<32>::Elf_Addr value = psymval->value(object, 0);
  
    const bool is_final = (gsym == NULL
  			 ? !parameters->options().shared()
  			 : gsym->final_value_is_known());
    const tls::Tls_optimization optimized_type
        = Target_i386::optimize_tls_reloc(is_final, r_type);
    switch (r_type)
      {
      case elfcpp::R_386_TLS_GD:           // Global-dynamic
        if (optimized_type == tls::TLSOPT_TO_LE)
  	{
  	  if (tls_segment == NULL)
  	    {
  	      gold_assert(parameters->errors()->error_count() > 0
  			  || issue_undefined_symbol_error(gsym));
  	      return;
  	    }
  	  this->tls_gd_to_le(relinfo, relnum, tls_segment,
  			     rel, r_type, value, view,
  			     view_size);
  	  break;
  	}
        else
  	{
  	  unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
  				   ? GOT_TYPE_TLS_NOFFSET
  				   : GOT_TYPE_TLS_PAIR);
  	  unsigned int got_offset;
  	  if (gsym != NULL)
  	    {
  	      gold_assert(gsym->has_got_offset(got_type));
  	      got_offset = gsym->got_offset(got_type) - target->got_size();
  	    }
  	  else
  	    {
  	      unsigned int r_sym = elfcpp::elf_r_sym<32>(rel.get_r_info());
  	      gold_assert(object->local_has_got_offset(r_sym, got_type));
  	      got_offset = (object->local_got_offset(r_sym, got_type)
  			    - target->got_size());
  	    }
  	  if (optimized_type == tls::TLSOPT_TO_IE)
  	    {
  	      this->tls_gd_to_ie(relinfo, relnum, tls_segment, rel, r_type,
  				 got_offset, view, view_size);
  	      break;
  	    }
  	  else if (optimized_type == tls::TLSOPT_NONE)
  	    {
  	      // Relocate the field with the offset of the pair of GOT
  	      // entries.
  	      Relocate_functions<32, false>::rel32(view, got_offset);
  	      break;
  	    }
  	}
        gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			     _("unsupported reloc %u"),
  			     r_type);
        break;
  
      case elfcpp::R_386_TLS_GOTDESC:      // Global-dynamic (from ~oliva url)
      case elfcpp::R_386_TLS_DESC_CALL:
        this->local_dynamic_type_ = LOCAL_DYNAMIC_GNU;
        if (optimized_type == tls::TLSOPT_TO_LE)
  	{
  	  if (tls_segment == NULL)
  	    {
  	      gold_assert(parameters->errors()->error_count() > 0
  			  || issue_undefined_symbol_error(gsym));
  	      return;
  	    }
  	  this->tls_desc_gd_to_le(relinfo, relnum, tls_segment,
  				  rel, r_type, value, view,
  				  view_size);
  	  break;
  	}
        else
  	{
  	  unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
  				   ? GOT_TYPE_TLS_NOFFSET
  				   : GOT_TYPE_TLS_DESC);
  	  unsigned int got_offset = 0;
  	  if (r_type == elfcpp::R_386_TLS_GOTDESC
  	      && optimized_type == tls::TLSOPT_NONE)
  	    {
  	      // We created GOT entries in the .got.tlsdesc portion of
  	      // the .got.plt section, but the offset stored in the
  	      // symbol is the offset within .got.tlsdesc.
  	      got_offset = (target->got_size()
  			    + target->got_plt_section()->data_size());
  	    }
  	  if (gsym != NULL)
  	    {
  	      gold_assert(gsym->has_got_offset(got_type));
  	      got_offset += gsym->got_offset(got_type) - target->got_size();
  	    }
  	  else
  	    {
  	      unsigned int r_sym = elfcpp::elf_r_sym<32>(rel.get_r_info());
  	      gold_assert(object->local_has_got_offset(r_sym, got_type));
  	      got_offset += (object->local_got_offset(r_sym, got_type)
  			     - target->got_size());
  	    }
  	  if (optimized_type == tls::TLSOPT_TO_IE)
  	    {
  	      if (tls_segment == NULL)
  		{
  		  gold_assert(parameters->errors()->error_count() > 0
  			      || issue_undefined_symbol_error(gsym));
  		  return;
  		}
  	      this->tls_desc_gd_to_ie(relinfo, relnum, tls_segment, rel, r_type,
  				      got_offset, view, view_size);
  	      break;
  	    }
  	  else if (optimized_type == tls::TLSOPT_NONE)
  	    {
  	      if (r_type == elfcpp::R_386_TLS_GOTDESC)
  		{
  		  // Relocate the field with the offset of the pair of GOT
  		  // entries.
  		  Relocate_functions<32, false>::rel32(view, got_offset);
  		}
  	      break;
  	    }
  	}
        gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			     _("unsupported reloc %u"),
  			     r_type);
        break;
  
      case elfcpp::R_386_TLS_LDM:          // Local-dynamic
        if (this->local_dynamic_type_ == LOCAL_DYNAMIC_SUN)
  	{
  	  gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  				 _("both SUN and GNU model "
  				   "TLS relocations"));
  	  break;
  	}
        this->local_dynamic_type_ = LOCAL_DYNAMIC_GNU;
        if (optimized_type == tls::TLSOPT_TO_LE)
  	{
  	  if (tls_segment == NULL)
  	    {
  	      gold_assert(parameters->errors()->error_count() > 0
  			  || issue_undefined_symbol_error(gsym));
  	      return;
  	    }
  	  this->tls_ld_to_le(relinfo, relnum, tls_segment, rel, r_type,
  			     value, view, view_size);
  	  break;
  	}
        else if (optimized_type == tls::TLSOPT_NONE)
  	{
  	  // Relocate the field with the offset of the GOT entry for
  	  // the module index.
  	  unsigned int got_offset;
  	  got_offset = (target->got_mod_index_entry(NULL, NULL, NULL)
  			- target->got_size());
  	  Relocate_functions<32, false>::rel32(view, got_offset);
  	  break;
  	}
        gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			     _("unsupported reloc %u"),
  			     r_type);
        break;
  
      case elfcpp::R_386_TLS_LDO_32:       // Alternate local-dynamic
        if (optimized_type == tls::TLSOPT_TO_LE)
  	{
  	  // This reloc can appear in debugging sections, in which
  	  // case we must not convert to local-exec.  We decide what
  	  // to do based on whether the section is marked as
  	  // containing executable code.  That is what the GNU linker
  	  // does as well.
  	  elfcpp::Shdr<32, false> shdr(relinfo->data_shdr);
  	  if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
  	    {
  	      if (tls_segment == NULL)
  		{
  		  gold_assert(parameters->errors()->error_count() > 0
  			      || issue_undefined_symbol_error(gsym));
  		  return;
  		}
  	      value -= tls_segment->memsz();
  	    }
  	}
        Relocate_functions<32, false>::rel32(view, value);
        break;
  
      case elfcpp::R_386_TLS_IE:           // Initial-exec
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_IE_32:
        if (optimized_type == tls::TLSOPT_TO_LE)
  	{
  	  if (tls_segment == NULL)
  	    {
  	      gold_assert(parameters->errors()->error_count() > 0
  			  || issue_undefined_symbol_error(gsym));
  	      return;
  	    }
  	  Target_i386::Relocate::tls_ie_to_le(relinfo, relnum, tls_segment,
  					      rel, r_type, value, view,
  					      view_size);
  	  break;
  	}
        else if (optimized_type == tls::TLSOPT_NONE)
  	{
  	  // Relocate the field with the offset of the GOT entry for
  	  // the tp-relative offset of the symbol.
  	  unsigned int got_type = (r_type == elfcpp::R_386_TLS_IE_32
  				   ? GOT_TYPE_TLS_OFFSET
  				   : GOT_TYPE_TLS_NOFFSET);
  	  unsigned int got_offset;
  	  if (gsym != NULL)
  	    {
  	      gold_assert(gsym->has_got_offset(got_type));
  	      got_offset = gsym->got_offset(got_type);
  	    }
  	  else
  	    {
  	      unsigned int r_sym = elfcpp::elf_r_sym<32>(rel.get_r_info());
  	      gold_assert(object->local_has_got_offset(r_sym, got_type));
  	      got_offset = object->local_got_offset(r_sym, got_type);
  	    }
  	  // For the R_386_TLS_IE relocation, we need to apply the
  	  // absolute address of the GOT entry.
  	  if (r_type == elfcpp::R_386_TLS_IE)
  	    got_offset += target->got_plt_section()->address();
  	  // All GOT offsets are relative to the end of the GOT.
  	  got_offset -= target->got_size();
  	  Relocate_functions<32, false>::rel32(view, got_offset);
  	  break;
  	}
        gold_error_at_location(relinfo, relnum, rel.get_r_offset(),
  			     _("unsupported reloc %u"),
  			     r_type);
        break;
  
      case elfcpp::R_386_TLS_LE:           // Local-exec
        // If we're creating a shared library, a dynamic relocation will
        // have been created for this location, so do not apply it now.
        if (!parameters->options().shared())
  	{
  	  if (tls_segment == NULL)
  	    {
  	      gold_assert(parameters->errors()->error_count() > 0
  			  || issue_undefined_symbol_error(gsym));
  	      return;
  	    }
  	  value -= tls_segment->memsz();
  	  Relocate_functions<32, false>::rel32(view, value);
  	}
        break;
  
      case elfcpp::R_386_TLS_LE_32:
        // If we're creating a shared library, a dynamic relocation will
        // have been created for this location, so do not apply it now.
        if (!parameters->options().shared())
  	{
  	  if (tls_segment == NULL)
  	    {
  	      gold_assert(parameters->errors()->error_count() > 0
  			  || issue_undefined_symbol_error(gsym));
  	      return;
  	    }
  	  value = tls_segment->memsz() - value;
  	  Relocate_functions<32, false>::rel32(view, value);
  	}
        break;
      }
  }
  
  // Do a relocation in which we convert a TLS General-Dynamic to a
  // Local-Exec.
  
  inline void
  Target_i386::Relocate::tls_gd_to_le(const Relocate_info<32, false>* relinfo,
  				    size_t relnum,
  				    Output_segment* tls_segment,
  				    const elfcpp::Rel<32, false>& rel,
  				    unsigned int,
  				    elfcpp::Elf_types<32>::Elf_Addr value,
  				    unsigned char* view,
  				    section_size_type view_size)
  {
    // leal foo(,%reg,1),%eax; call ___tls_get_addr
    //  ==> movl %gs:0,%eax; subl $foo@tpoff,%eax
    // leal foo(%reg),%eax; call ___tls_get_addr
    //  ==> movl %gs:0,%eax; subl $foo@tpoff,%eax
  
    tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
    tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 9);
  
    unsigned char op1 = view[-1];
    unsigned char op2 = view[-2];
  
    tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		 op2 == 0x8d || op2 == 0x04);
    tls::check_tls(relinfo, relnum, rel.get_r_offset(), view[4] == 0xe8);
  
    int roff = 5;
  
    if (op2 == 0x04)
      {
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -3);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(), view[-3] == 0x8d);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     ((op1 & 0xc7) == 0x05 && op1 != (4 << 3)));
        memcpy(view - 3, "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
      }
    else
      {
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     (op1 & 0xf8) == 0x80 && (op1 & 7) != 4);
        if (rel.get_r_offset() + 9 < view_size
  	  && view[9] == 0x90)
  	{
  	  // There is a trailing nop.  Use the size byte subl.
  	  memcpy(view - 2, "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
  	  roff = 6;
  	}
        else
  	{
  	  // Use the five byte subl.
  	  memcpy(view - 2, "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
  	}
      }
  
    value = tls_segment->memsz() - value;
    Relocate_functions<32, false>::rel32(view + roff, value);
  
    // The next reloc should be a PLT32 reloc against __tls_get_addr.
    // We can skip it.
    this->skip_call_tls_get_addr_ = true;
  }
  
  // Do a relocation in which we convert a TLS General-Dynamic to an
  // Initial-Exec.
  
  inline void
  Target_i386::Relocate::tls_gd_to_ie(const Relocate_info<32, false>* relinfo,
  				    size_t relnum,
  				    Output_segment*,
  				    const elfcpp::Rel<32, false>& rel,
  				    unsigned int,
  				    elfcpp::Elf_types<32>::Elf_Addr value,
  				    unsigned char* view,
  				    section_size_type view_size)
  {
    // leal foo(,%ebx,1),%eax; call ___tls_get_addr
    //  ==> movl %gs:0,%eax; addl foo@gotntpoff(%ebx),%eax
  
    tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
    tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 9);
  
    unsigned char op1 = view[-1];
    unsigned char op2 = view[-2];
  
    tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		 op2 == 0x8d || op2 == 0x04);
    tls::check_tls(relinfo, relnum, rel.get_r_offset(), view[4] == 0xe8);
  
    int roff = 5;
  
    // FIXME: For now, support only the first (SIB) form.
    tls::check_tls(relinfo, relnum, rel.get_r_offset(), op2 == 0x04);
  
    if (op2 == 0x04)
      {
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -3);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(), view[-3] == 0x8d);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     ((op1 & 0xc7) == 0x05 && op1 != (4 << 3)));
        memcpy(view - 3, "\x65\xa1\0\0\0\0\x03\x83\0\0\0", 12);
      }
    else
      {
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     (op1 & 0xf8) == 0x80 && (op1 & 7) != 4);
        if (rel.get_r_offset() + 9 < view_size
  	  && view[9] == 0x90)
  	{
  	  // FIXME: This is not the right instruction sequence.
  	  // There is a trailing nop.  Use the size byte subl.
  	  memcpy(view - 2, "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
  	  roff = 6;
  	}
        else
  	{
  	  // FIXME: This is not the right instruction sequence.
  	  // Use the five byte subl.
  	  memcpy(view - 2, "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
  	}
      }
  
    Relocate_functions<32, false>::rel32(view + roff, value);
  
    // The next reloc should be a PLT32 reloc against __tls_get_addr.
    // We can skip it.
    this->skip_call_tls_get_addr_ = true;
  }
  
  // Do a relocation in which we convert a TLS_GOTDESC or TLS_DESC_CALL
  // General-Dynamic to a Local-Exec.
  
  inline void
  Target_i386::Relocate::tls_desc_gd_to_le(
      const Relocate_info<32, false>* relinfo,
      size_t relnum,
      Output_segment* tls_segment,
      const elfcpp::Rel<32, false>& rel,
      unsigned int r_type,
      elfcpp::Elf_types<32>::Elf_Addr value,
      unsigned char* view,
      section_size_type view_size)
  {
    if (r_type == elfcpp::R_386_TLS_GOTDESC)
      {
        // leal foo@TLSDESC(%ebx), %eax
        // ==> leal foo@NTPOFF, %eax
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 4);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     view[-2] == 0x8d && view[-1] == 0x83);
        view[-1] = 0x05;
        value -= tls_segment->memsz();
        Relocate_functions<32, false>::rel32(view, value);
      }
    else
      {
        // call *foo@TLSCALL(%eax)
        // ==> nop; nop
        gold_assert(r_type == elfcpp::R_386_TLS_DESC_CALL);
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 2);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     view[0] == 0xff && view[1] == 0x10);
        view[0] = 0x66;
        view[1] = 0x90;
      }
  }
  
  // Do a relocation in which we convert a TLS_GOTDESC or TLS_DESC_CALL
  // General-Dynamic to an Initial-Exec.
  
  inline void
  Target_i386::Relocate::tls_desc_gd_to_ie(
      const Relocate_info<32, false>* relinfo,
      size_t relnum,
      Output_segment*,
      const elfcpp::Rel<32, false>& rel,
      unsigned int r_type,
      elfcpp::Elf_types<32>::Elf_Addr value,
      unsigned char* view,
      section_size_type view_size)
  {
    if (r_type == elfcpp::R_386_TLS_GOTDESC)
      {
        // leal foo@TLSDESC(%ebx), %eax
        // ==> movl foo@GOTNTPOFF(%ebx), %eax
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 4);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     view[-2] == 0x8d && view[-1] == 0x83);
        view[-2] = 0x8b;
        Relocate_functions<32, false>::rel32(view, value);
      }
    else
      {
        // call *foo@TLSCALL(%eax)
        // ==> nop; nop
        gold_assert(r_type == elfcpp::R_386_TLS_DESC_CALL);
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 2);
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     view[0] == 0xff && view[1] == 0x10);
        view[0] = 0x66;
        view[1] = 0x90;
      }
  }
  
  // Do a relocation in which we convert a TLS Local-Dynamic to a
  // Local-Exec.
  
  inline void
  Target_i386::Relocate::tls_ld_to_le(const Relocate_info<32, false>* relinfo,
  				    size_t relnum,
  				    Output_segment*,
  				    const elfcpp::Rel<32, false>& rel,
  				    unsigned int,
  				    elfcpp::Elf_types<32>::Elf_Addr,
  				    unsigned char* view,
  				    section_size_type view_size)
  {
    // leal foo(%reg), %eax; call ___tls_get_addr
    // ==> movl %gs:0,%eax; nop; leal 0(%esi,1),%esi
  
    tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
    tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 9);
  
    // FIXME: Does this test really always pass?
    tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		 view[-2] == 0x8d && view[-1] == 0x83);
  
    tls::check_tls(relinfo, relnum, rel.get_r_offset(), view[4] == 0xe8);
  
    memcpy(view - 2, "\x65\xa1\0\0\0\0\x90\x8d\x74\x26\0", 11);
  
    // The next reloc should be a PLT32 reloc against __tls_get_addr.
    // We can skip it.
    this->skip_call_tls_get_addr_ = true;
  }
  
  // Do a relocation in which we convert a TLS Initial-Exec to a
  // Local-Exec.
  
  inline void
  Target_i386::Relocate::tls_ie_to_le(const Relocate_info<32, false>* relinfo,
  				    size_t relnum,
  				    Output_segment* tls_segment,
  				    const elfcpp::Rel<32, false>& rel,
  				    unsigned int r_type,
  				    elfcpp::Elf_types<32>::Elf_Addr value,
  				    unsigned char* view,
  				    section_size_type view_size)
  {
    // We have to actually change the instructions, which means that we
    // need to examine the opcodes to figure out which instruction we
    // are looking at.
    if (r_type == elfcpp::R_386_TLS_IE)
      {
        // movl %gs:XX,%eax  ==>  movl $YY,%eax
        // movl %gs:XX,%reg  ==>  movl $YY,%reg
        // addl %gs:XX,%reg  ==>  addl $YY,%reg
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -1);
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 4);
  
        unsigned char op1 = view[-1];
        if (op1 == 0xa1)
  	{
  	  // movl XX,%eax  ==>  movl $YY,%eax
  	  view[-1] = 0xb8;
  	}
        else
  	{
  	  tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
  
  	  unsigned char op2 = view[-2];
  	  if (op2 == 0x8b)
  	    {
  	      // movl XX,%reg  ==>  movl $YY,%reg
  	      tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  			     (op1 & 0xc7) == 0x05);
  	      view[-2] = 0xc7;
  	      view[-1] = 0xc0 | ((op1 >> 3) & 7);
  	    }
  	  else if (op2 == 0x03)
  	    {
  	      // addl XX,%reg  ==>  addl $YY,%reg
  	      tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  			     (op1 & 0xc7) == 0x05);
  	      view[-2] = 0x81;
  	      view[-1] = 0xc0 | ((op1 >> 3) & 7);
  	    }
  	  else
  	    tls::check_tls(relinfo, relnum, rel.get_r_offset(), 0);
  	}
      }
    else
      {
        // subl %gs:XX(%reg1),%reg2  ==>  subl $YY,%reg2
        // movl %gs:XX(%reg1),%reg2  ==>  movl $YY,%reg2
        // addl %gs:XX(%reg1),%reg2  ==>  addl $YY,$reg2
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, -2);
        tls::check_range(relinfo, relnum, rel.get_r_offset(), view_size, 4);
  
        unsigned char op1 = view[-1];
        unsigned char op2 = view[-2];
        tls::check_tls(relinfo, relnum, rel.get_r_offset(),
  		     (op1 & 0xc0) == 0x80 && (op1 & 7) != 4);
        if (op2 == 0x8b)
  	{
  	  // movl %gs:XX(%reg1),%reg2  ==>  movl $YY,%reg2
  	  view[-2] = 0xc7;
  	  view[-1] = 0xc0 | ((op1 >> 3) & 7);
  	}
        else if (op2 == 0x2b)
  	{
  	  // subl %gs:XX(%reg1),%reg2  ==>  subl $YY,%reg2
  	  view[-2] = 0x81;
  	  view[-1] = 0xe8 | ((op1 >> 3) & 7);
  	}
        else if (op2 == 0x03)
  	{
  	  // addl %gs:XX(%reg1),%reg2  ==>  addl $YY,$reg2
  	  view[-2] = 0x81;
  	  view[-1] = 0xc0 | ((op1 >> 3) & 7);
  	}
        else
  	tls::check_tls(relinfo, relnum, rel.get_r_offset(), 0);
      }
  
    value = tls_segment->memsz() - value;
    if (r_type == elfcpp::R_386_TLS_IE || r_type == elfcpp::R_386_TLS_GOTIE)
      value = - value;
  
    Relocate_functions<32, false>::rel32(view, value);
  }
  
  // Relocate section data.
  
  void
  Target_i386::relocate_section(const Relocate_info<32, false>* relinfo,
  			      unsigned int sh_type,
  			      const unsigned char* prelocs,
  			      size_t reloc_count,
  			      Output_section* output_section,
  			      bool needs_special_offset_handling,
  			      unsigned char* view,
  			      elfcpp::Elf_types<32>::Elf_Addr address,
  			      section_size_type view_size,
  			      const Reloc_symbol_changes* reloc_symbol_changes)
  {
    gold_assert(sh_type == elfcpp::SHT_REL);
  
    gold::relocate_section<32, false, Target_i386, elfcpp::SHT_REL,
  			 Target_i386::Relocate, gold::Default_comdat_behavior>(
      relinfo,
      this,
      prelocs,
      reloc_count,
      output_section,
      needs_special_offset_handling,
      view,
      address,
      view_size,
      reloc_symbol_changes);
  }
  
  // Return the size of a relocation while scanning during a relocatable
  // link.
  
  unsigned int
  Target_i386::Relocatable_size_for_reloc::get_size_for_reloc(
      unsigned int r_type,
      Relobj* object)
  {
    switch (r_type)
      {
      case elfcpp::R_386_NONE:
      case elfcpp::R_386_GNU_VTINHERIT:
      case elfcpp::R_386_GNU_VTENTRY:
      case elfcpp::R_386_TLS_GD:            // Global-dynamic
      case elfcpp::R_386_TLS_GOTDESC:       // Global-dynamic (from ~oliva url)
      case elfcpp::R_386_TLS_DESC_CALL:
      case elfcpp::R_386_TLS_LDM:           // Local-dynamic
      case elfcpp::R_386_TLS_LDO_32:        // Alternate local-dynamic
      case elfcpp::R_386_TLS_IE:            // Initial-exec
      case elfcpp::R_386_TLS_IE_32:
      case elfcpp::R_386_TLS_GOTIE:
      case elfcpp::R_386_TLS_LE:            // Local-exec
      case elfcpp::R_386_TLS_LE_32:
        return 0;
  
      case elfcpp::R_386_32:
      case elfcpp::R_386_PC32:
      case elfcpp::R_386_GOT32:
      case elfcpp::R_386_PLT32:
      case elfcpp::R_386_GOTOFF:
      case elfcpp::R_386_GOTPC:
       return 4;
  
      case elfcpp::R_386_16:
      case elfcpp::R_386_PC16:
        return 2;
  
      case elfcpp::R_386_8:
      case elfcpp::R_386_PC8:
        return 1;
  
        // These are relocations which should only be seen by the
        // dynamic linker, and should never be seen here.
      case elfcpp::R_386_COPY:
      case elfcpp::R_386_GLOB_DAT:
      case elfcpp::R_386_JUMP_SLOT:
      case elfcpp::R_386_RELATIVE:
      case elfcpp::R_386_IRELATIVE:
      case elfcpp::R_386_TLS_TPOFF:
      case elfcpp::R_386_TLS_DTPMOD32:
      case elfcpp::R_386_TLS_DTPOFF32:
      case elfcpp::R_386_TLS_TPOFF32:
      case elfcpp::R_386_TLS_DESC:
        object->error(_("unexpected reloc %u in object file"), r_type);
        return 0;
  
      case elfcpp::R_386_32PLT:
      case elfcpp::R_386_TLS_GD_32:
      case elfcpp::R_386_TLS_GD_PUSH:
      case elfcpp::R_386_TLS_GD_CALL:
      case elfcpp::R_386_TLS_GD_POP:
      case elfcpp::R_386_TLS_LDM_32:
      case elfcpp::R_386_TLS_LDM_PUSH:
      case elfcpp::R_386_TLS_LDM_CALL:
      case elfcpp::R_386_TLS_LDM_POP:
      case elfcpp::R_386_USED_BY_INTEL_200:
      default:
        object->error(_("unsupported reloc %u in object file"), r_type);
        return 0;
      }
  }
  
  // Scan the relocs during a relocatable link.
  
  void
  Target_i386::scan_relocatable_relocs(Symbol_table* symtab,
  				     Layout* layout,
  				     Sized_relobj_file<32, false>* object,
  				     unsigned int data_shndx,
  				     unsigned int sh_type,
  				     const unsigned char* prelocs,
  				     size_t reloc_count,
  				     Output_section* output_section,
  				     bool needs_special_offset_handling,
  				     size_t local_symbol_count,
  				     const unsigned char* plocal_symbols,
  				     Relocatable_relocs* rr)
  {
    gold_assert(sh_type == elfcpp::SHT_REL);
  
    typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_REL,
      Relocatable_size_for_reloc> Scan_relocatable_relocs;
  
    gold::scan_relocatable_relocs<32, false, elfcpp::SHT_REL,
        Scan_relocatable_relocs>(
      symtab,
      layout,
      object,
      data_shndx,
      prelocs,
      reloc_count,
      output_section,
      needs_special_offset_handling,
      local_symbol_count,
      plocal_symbols,
      rr);
  }
  
  // Emit relocations for a section.
  
  void
  Target_i386::relocate_relocs(
      const Relocate_info<32, false>* relinfo,
      unsigned int sh_type,
      const unsigned char* prelocs,
      size_t reloc_count,
      Output_section* output_section,
      elfcpp::Elf_types<32>::Elf_Off offset_in_output_section,
      const Relocatable_relocs* rr,
      unsigned char* view,
      elfcpp::Elf_types<32>::Elf_Addr view_address,
      section_size_type view_size,
      unsigned char* reloc_view,
      section_size_type reloc_view_size)
  {
    gold_assert(sh_type == elfcpp::SHT_REL);
  
    gold::relocate_relocs<32, false, elfcpp::SHT_REL>(
      relinfo,
      prelocs,
      reloc_count,
      output_section,
      offset_in_output_section,
      rr,
      view,
      view_address,
      view_size,
      reloc_view,
      reloc_view_size);
  }
  
  // Return the value to use for a dynamic which requires special
  // treatment.  This is how we support equality comparisons of function
  // pointers across shared library boundaries, as described in the
  // processor specific ABI supplement.
  
  uint64_t
  Target_i386::do_dynsym_value(const Symbol* gsym) const
  {
    gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
    return this->plt_address_for_global(gsym);
  }
  
  // Return a string used to fill a code section with nops to take up
  // the specified length.
  
  std::string
  Target_i386::do_code_fill(section_size_type length) const
  {
    if (length >= 16)
      {
        // Build a jmp instruction to skip over the bytes.
        unsigned char jmp[5];
        jmp[0] = 0xe9;
        elfcpp::Swap_unaligned<32, false>::writeval(jmp + 1, length - 5);
        return (std::string(reinterpret_cast<char*>(&jmp[0]), 5)
  	      + std::string(length - 5, static_cast<char>(0x90)));
      }
  
    // Nop sequences of various lengths.
    const char nop1[1] = { '\x90' };                   // nop
    const char nop2[2] = { '\x66', '\x90' };           // xchg %ax %ax
    const char nop3[3] = { '\x8d', '\x76', '\x00' };   // leal 0(%esi),%esi
    const char nop4[4] = { '\x8d', '\x74', '\x26',     // leal 0(%esi,1),%esi
  			 '\x00'};
    const char nop5[5] = { '\x90', '\x8d', '\x74',     // nop
  			 '\x26', '\x00' };           // leal 0(%esi,1),%esi
    const char nop6[6] = { '\x8d', '\xb6', '\x00',     // leal 0L(%esi),%esi
  			 '\x00', '\x00', '\x00' };
    const char nop7[7] = { '\x8d', '\xb4', '\x26',     // leal 0L(%esi,1),%esi
  			 '\x00', '\x00', '\x00',
  			 '\x00' };
    const char nop8[8] = { '\x90', '\x8d', '\xb4',     // nop
  			 '\x26', '\x00', '\x00',     // leal 0L(%esi,1),%esi
  			 '\x00', '\x00' };
    const char nop9[9] = { '\x89', '\xf6', '\x8d',     // movl %esi,%esi
  			 '\xbc', '\x27', '\x00',     // leal 0L(%edi,1),%edi
  			 '\x00', '\x00', '\x00' };
    const char nop10[10] = { '\x8d', '\x76', '\x00',   // leal 0(%esi),%esi
  			   '\x8d', '\xbc', '\x27',   // leal 0L(%edi,1),%edi
  			   '\x00', '\x00', '\x00',
  			   '\x00' };
    const char nop11[11] = { '\x8d', '\x74', '\x26',   // leal 0(%esi,1),%esi
  			   '\x00', '\x8d', '\xbc',   // leal 0L(%edi,1),%edi
  			   '\x27', '\x00', '\x00',
  			   '\x00', '\x00' };
    const char nop12[12] = { '\x8d', '\xb6', '\x00',   // leal 0L(%esi),%esi
  			   '\x00', '\x00', '\x00',   // leal 0L(%edi),%edi
  			   '\x8d', '\xbf', '\x00',
  			   '\x00', '\x00', '\x00' };
    const char nop13[13] = { '\x8d', '\xb6', '\x00',   // leal 0L(%esi),%esi
  			   '\x00', '\x00', '\x00',   // leal 0L(%edi,1),%edi
  			   '\x8d', '\xbc', '\x27',
  			   '\x00', '\x00', '\x00',
  			   '\x00' };
    const char nop14[14] = { '\x8d', '\xb4', '\x26',   // leal 0L(%esi,1),%esi
  			   '\x00', '\x00', '\x00',   // leal 0L(%edi,1),%edi
  			   '\x00', '\x8d', '\xbc',
  			   '\x27', '\x00', '\x00',
  			   '\x00', '\x00' };
    const char nop15[15] = { '\xeb', '\x0d', '\x90',   // jmp .+15
  			   '\x90', '\x90', '\x90',   // nop,nop,nop,...
  			   '\x90', '\x90', '\x90',
  			   '\x90', '\x90', '\x90',
  			   '\x90', '\x90', '\x90' };
  
    const char* nops[16] = {
      NULL,
      nop1, nop2, nop3, nop4, nop5, nop6, nop7,
      nop8, nop9, nop10, nop11, nop12, nop13, nop14, nop15
    };
  
    return std::string(nops[length], length);
  }
  
  // Return the value to use for the base of a DW_EH_PE_datarel offset
  // in an FDE.  Solaris and SVR4 use DW_EH_PE_datarel because their
  // assembler can not write out the difference between two labels in
  // different sections, so instead of using a pc-relative value they
  // use an offset from the GOT.
  
  uint64_t
  Target_i386::do_ehframe_datarel_base() const
  {
    gold_assert(this->global_offset_table_ != NULL);
    Symbol* sym = this->global_offset_table_;
    Sized_symbol<32>* ssym = static_cast<Sized_symbol<32>*>(sym);
    return ssym->value();
  }
  
  // Return whether SYM should be treated as a call to a non-split
  // function.  We don't want that to be true of a call to a
  // get_pc_thunk function.
  
  bool
  Target_i386::do_is_call_to_non_split(const Symbol* sym, unsigned int) const
  {
    return (sym->type() == elfcpp::STT_FUNC
  	  && !is_prefix_of("__i686.get_pc_thunk.", sym->name()));
  }
  
  // FNOFFSET in section SHNDX in OBJECT is the start of a function
  // compiled with -fsplit-stack.  The function calls non-split-stack
  // code.  We have to change the function so that it always ensures
  // that it has enough stack space to run some random function.
  
  void
  Target_i386::do_calls_non_split(Relobj* object, unsigned int shndx,
  				       section_offset_type fnoffset,
  				       section_size_type fnsize,
  				       unsigned char* view,
  				       section_size_type view_size,
  				       std::string* from,
  				       std::string* to) const
  {
    // The function starts with a comparison of the stack pointer and a
    // field in the TCB.  This is followed by a jump.
  
    // cmp %gs:NN,%esp
    if (this->match_view(view, view_size, fnoffset, "\x65\x3b\x25", 3)
        && fnsize > 7)
      {
        // We will call __morestack if the carry flag is set after this
        // comparison.  We turn the comparison into an stc instruction
        // and some nops.
        view[fnoffset] = '\xf9';
        this->set_view_to_nop(view, view_size, fnoffset + 1, 6);
      }
    // lea NN(%esp),%ecx
    // lea NN(%esp),%edx
    else if ((this->match_view(view, view_size, fnoffset, "\x8d\x8c\x24", 3)
  	    || this->match_view(view, view_size, fnoffset, "\x8d\x94\x24", 3))
  	   && fnsize > 7)
      {
        // This is loading an offset from the stack pointer for a
        // comparison.  The offset is negative, so we decrease the
        // offset by the amount of space we need for the stack.  This
        // means we will avoid calling __morestack if there happens to
        // be plenty of space on the stack already.
        unsigned char* pval = view + fnoffset + 3;
        uint32_t val = elfcpp::Swap_unaligned<32, false>::readval(pval);
        val -= parameters->options().split_stack_adjust_size();
        elfcpp::Swap_unaligned<32, false>::writeval(pval, val);
      }
    else
      {
        if (!object->has_no_split_stack())
  	object->error(_("failed to match split-stack sequence at "
  			"section %u offset %0zx"),
  		      shndx, static_cast<size_t>(fnoffset));
        return;
      }
  
    // We have to change the function so that it calls
    // __morestack_non_split instead of __morestack.  The former will
    // allocate additional stack space.
    *from = "__morestack";
    *to = "__morestack_non_split";
  }
  
  // The selector for i386 object files.  Note this is never instantiated
  // directly.  It's only used in Target_selector_i386_nacl, below.
  
  class Target_selector_i386 : public Target_selector_freebsd
  {
  public:
    Target_selector_i386()
      : Target_selector_freebsd(elfcpp::EM_386, 32, false,
  			      "elf32-i386", "elf32-i386-freebsd",
  			      "elf_i386")
    { }
  
    Target*
    do_instantiate_target()
    { return new Target_i386(); }
  };
  
  // NaCl variant.  It uses different PLT contents.
  
  class Output_data_plt_i386_nacl : public Output_data_plt_i386
  {
   public:
    Output_data_plt_i386_nacl(Layout* layout,
  			    Output_data_got_plt_i386* got_plt,
  			    Output_data_space* got_irelative)
      : Output_data_plt_i386(layout, plt_entry_size, got_plt, got_irelative)
    { }
  
   protected:
    virtual unsigned int
    do_get_plt_entry_size() const
    { return plt_entry_size; }
  
    virtual void
    do_add_eh_frame(Layout* layout)
    {
      layout->add_eh_frame_for_plt(this, plt_eh_frame_cie, plt_eh_frame_cie_size,
  				 plt_eh_frame_fde, plt_eh_frame_fde_size);
    }
  
    // The size of an entry in the PLT.
    static const int plt_entry_size = 64;
  
    // The .eh_frame unwind information for the PLT.
    static const int plt_eh_frame_fde_size = 32;
    static const unsigned char plt_eh_frame_fde[plt_eh_frame_fde_size];
  };
  
  class Output_data_plt_i386_nacl_exec : public Output_data_plt_i386_nacl
  {
  public:
    Output_data_plt_i386_nacl_exec(Layout* layout,
  				 Output_data_got_plt_i386* got_plt,
  				 Output_data_space* got_irelative)
      : Output_data_plt_i386_nacl(layout, got_plt, got_irelative)
    { }
  
   protected:
    virtual void
    do_fill_first_plt_entry(unsigned char* pov,
  			  elfcpp::Elf_types<32>::Elf_Addr got_address);
  
    virtual unsigned int
    do_fill_plt_entry(unsigned char* pov,
  		    elfcpp::Elf_types<32>::Elf_Addr got_address,
  		    unsigned int got_offset,
  		    unsigned int plt_offset,
  		    unsigned int plt_rel_offset);
  
   private:
    // The first entry in the PLT for an executable.
    static const unsigned char first_plt_entry[plt_entry_size];
  
    // Other entries in the PLT for an executable.
    static const unsigned char plt_entry[plt_entry_size];
  };
  
  class Output_data_plt_i386_nacl_dyn : public Output_data_plt_i386_nacl
  {
   public:
    Output_data_plt_i386_nacl_dyn(Layout* layout,
  				Output_data_got_plt_i386* got_plt,
  				Output_data_space* got_irelative)
      : Output_data_plt_i386_nacl(layout, got_plt, got_irelative)
    { }
  
   protected:
    virtual void
    do_fill_first_plt_entry(unsigned char* pov, elfcpp::Elf_types<32>::Elf_Addr);
  
    virtual unsigned int
    do_fill_plt_entry(unsigned char* pov,
  		    elfcpp::Elf_types<32>::Elf_Addr,
  		    unsigned int got_offset,
  		    unsigned int plt_offset,
  		    unsigned int plt_rel_offset);
  
   private:
    // The first entry in the PLT for a shared object.
    static const unsigned char first_plt_entry[plt_entry_size];
  
    // Other entries in the PLT for a shared object.
    static const unsigned char plt_entry[plt_entry_size];
  };
  
  class Target_i386_nacl : public Target_i386
  {
   public:
    Target_i386_nacl()
      : Target_i386(&i386_nacl_info)
    { }
  
   protected:
    virtual Output_data_plt_i386*
    do_make_data_plt(Layout* layout,
  		   Output_data_got_plt_i386* got_plt,
  		   Output_data_space* got_irelative,
  		   bool dyn)
    {
      if (dyn)
        return new Output_data_plt_i386_nacl_dyn(layout, got_plt, got_irelative);
      else
        return new Output_data_plt_i386_nacl_exec(layout, got_plt, got_irelative);
    }
  
    virtual std::string
    do_code_fill(section_size_type length) const;
  
   private:
    static const Target::Target_info i386_nacl_info;
  };
  
  const Target::Target_info Target_i386_nacl::i386_nacl_info =
  {
    32,			// size
    false,		// is_big_endian
    elfcpp::EM_386,	// machine_code
    false,		// has_make_symbol
    false,		// has_resolve
    true,			// has_code_fill
    true,			// is_default_stack_executable
    true,			// can_icf_inline_merge_sections
    '\0',			// wrap_char
    "/lib/ld-nacl-x86-32.so.1", // dynamic_linker
    0x20000,		// default_text_segment_address
    0x10000,		// abi_pagesize (overridable by -z max-page-size)
    0x10000,		// common_pagesize (overridable by -z common-page-size)
    true,                 // isolate_execinstr
    0x10000000,           // rosegment_gap
    elfcpp::SHN_UNDEF,	// small_common_shndx
    elfcpp::SHN_UNDEF,	// large_common_shndx
    0,			// small_common_section_flags
    0,			// large_common_section_flags
    NULL,			// attributes_section
    NULL,			// attributes_vendor
    "_start"		// entry_symbol_name
  };
  
  #define	NACLMASK	0xe0            // 32-byte alignment mask
  
  const unsigned char
  Output_data_plt_i386_nacl_exec::first_plt_entry[plt_entry_size] =
  {
    0xff, 0x35,                          // pushl contents of memory address
    0, 0, 0, 0,                          // replaced with address of .got + 4
    0x8b, 0x0d,                          // movl contents of address, %ecx
    0, 0, 0, 0,                          // replaced with address of .got + 8
    0x83, 0xe1, NACLMASK,                // andl $NACLMASK, %ecx
    0xff, 0xe1,                          // jmp *%ecx
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90
  };
  
  void
  Output_data_plt_i386_nacl_exec::do_fill_first_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr got_address)
  {
    memcpy(pov, first_plt_entry, plt_entry_size);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 2, got_address + 4);
    elfcpp::Swap<32, false>::writeval(pov + 8, got_address + 8);
  }
  
  // The first entry in the PLT for a shared object.
  
  const unsigned char
  Output_data_plt_i386_nacl_dyn::first_plt_entry[plt_entry_size] =
  {
    0xff, 0xb3, 4, 0, 0, 0,	// pushl 4(%ebx)
    0x8b, 0x4b, 0x08,		// mov 0x8(%ebx), %ecx
    0x83, 0xe1, NACLMASK,         // andl $NACLMASK, %ecx
    0xff, 0xe1,                   // jmp *%ecx
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90,  // nops
    0x90, 0x90, 0x90, 0x90, 0x90   // nops
  };
  
  void
  Output_data_plt_i386_nacl_dyn::do_fill_first_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr)
  {
    memcpy(pov, first_plt_entry, plt_entry_size);
  }
  
  // Subsequent entries in the PLT for an executable.
  
  const unsigned char
  Output_data_plt_i386_nacl_exec::plt_entry[plt_entry_size] =
  {
    0x8b, 0x0d,                    // movl contents of address, %ecx */
    0, 0, 0, 0,                    // replaced with address of symbol in .got
    0x83, 0xe1, NACLMASK,          // andl $NACLMASK, %ecx
    0xff, 0xe1,                    // jmp *%ecx
  
    // Pad to the next 32-byte boundary with nop instructions.
    0x90,
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
  
    // Lazy GOT entries point here (32-byte aligned).
    0x68,                       // pushl immediate
    0, 0, 0, 0,                 // replaced with offset into relocation table
    0xe9,                       // jmp relative
    0, 0, 0, 0,                 // replaced with offset to start of .plt
  
    // Pad to the next 32-byte boundary with nop instructions.
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
    0x90, 0x90
  };
  
  unsigned int
  Output_data_plt_i386_nacl_exec::do_fill_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr got_address,
      unsigned int got_offset,
      unsigned int plt_offset,
      unsigned int plt_rel_offset)
  {
    memcpy(pov, plt_entry, plt_entry_size);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 2,
  					      got_address + got_offset);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 33, plt_rel_offset);
    elfcpp::Swap<32, false>::writeval(pov + 38, - (plt_offset + 38 + 4));
    return 32;
  }
  
  // Subsequent entries in the PLT for a shared object.
  
  const unsigned char
  Output_data_plt_i386_nacl_dyn::plt_entry[plt_entry_size] =
  {
    0x8b, 0x8b,          // movl offset(%ebx), %ecx
    0, 0, 0, 0,          // replaced with offset of symbol in .got
    0x83, 0xe1, 0xe0,    // andl $NACLMASK, %ecx
    0xff, 0xe1,          // jmp *%ecx
  
    // Pad to the next 32-byte boundary with nop instructions.
    0x90,
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
  
    // Lazy GOT entries point here (32-byte aligned).
    0x68,                // pushl immediate
    0, 0, 0, 0,          // replaced with offset into relocation table.
    0xe9,                // jmp relative
    0, 0, 0, 0,          // replaced with offset to start of .plt.
  
    // Pad to the next 32-byte boundary with nop instructions.
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
    0x90, 0x90
  };
  
  unsigned int
  Output_data_plt_i386_nacl_dyn::do_fill_plt_entry(
      unsigned char* pov,
      elfcpp::Elf_types<32>::Elf_Addr,
      unsigned int got_offset,
      unsigned int plt_offset,
      unsigned int plt_rel_offset)
  {
    memcpy(pov, plt_entry, plt_entry_size);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 2, got_offset);
    elfcpp::Swap_unaligned<32, false>::writeval(pov + 33, plt_rel_offset);
    elfcpp::Swap<32, false>::writeval(pov + 38, - (plt_offset + 38 + 4));
    return 32;
  }
  
  const unsigned char
  Output_data_plt_i386_nacl::plt_eh_frame_fde[plt_eh_frame_fde_size] =
  {
    0, 0, 0, 0,				// Replaced with offset to .plt.
    0, 0, 0, 0,				// Replaced with size of .plt.
    0,					// Augmentation size.
    elfcpp::DW_CFA_def_cfa_offset, 8,	// DW_CFA_def_cfa_offset: 8.
    elfcpp::DW_CFA_advance_loc + 6,	// Advance 6 to __PLT__ + 6.
    elfcpp::DW_CFA_def_cfa_offset, 12,	// DW_CFA_def_cfa_offset: 12.
    elfcpp::DW_CFA_advance_loc + 58,	// Advance 58 to __PLT__ + 64.
    elfcpp::DW_CFA_def_cfa_expression,	// DW_CFA_def_cfa_expression.
    13,					// Block length.
    elfcpp::DW_OP_breg4, 4,		// Push %esp + 4.
    elfcpp::DW_OP_breg8, 0,		// Push %eip.
    elfcpp::DW_OP_const1u, 63,            // Push 0x3f.
    elfcpp::DW_OP_and,			// & (%eip & 0x3f).
    elfcpp::DW_OP_const1u, 37,            // Push 0x25.
    elfcpp::DW_OP_ge,			// >= ((%eip & 0x3f) >= 0x25)
    elfcpp::DW_OP_lit2,			// Push 2.
    elfcpp::DW_OP_shl,			// << (((%eip & 0x3f) >= 0x25) << 2)
    elfcpp::DW_OP_plus,			// + ((((%eip&0x3f)>=0x25)<<2)+%esp+4
    elfcpp::DW_CFA_nop,			// Align to 32 bytes.
    elfcpp::DW_CFA_nop
  };
  
  // Return a string used to fill a code section with nops.
  // For NaCl, long NOPs are only valid if they do not cross
  // bundle alignment boundaries, so keep it simple with one-byte NOPs.
  std::string
  Target_i386_nacl::do_code_fill(section_size_type length) const
  {
    return std::string(length, static_cast<char>(0x90));
  }
  
  // The selector for i386-nacl object files.
  
  class Target_selector_i386_nacl
    : public Target_selector_nacl<Target_selector_i386, Target_i386_nacl>
  {
   public:
    Target_selector_i386_nacl()
      : Target_selector_nacl<Target_selector_i386,
  			   Target_i386_nacl>("x86-32",
  					     "elf32-i386-nacl",
  					     "elf_i386_nacl")
    { }
  };
  
  Target_selector_i386_nacl target_selector_i386;
  
  } // End anonymous namespace.
  