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// sparc.cc -- sparc target support for gold.
 
// Copyright 2008, 2009 Free Software Foundation, Inc.
// Written by David S. Miller <davem@davemloft.net>.
 
// 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 <cstdlib>
#include <cstdio>
#include <cstring>
 
#include "elfcpp.h"
#include "parameters.h"
#include "reloc.h"
#include "sparc.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 "errors.h"
#include "gc.h"
 
namespace
{
 
using namespace gold;
 
template<int size, bool big_endian>
class Output_data_plt_sparc;
 
template<int size, bool big_endian>
class Target_sparc : public Sized_target<size, big_endian>
{
 public:
  typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
 
  Target_sparc()
    : Sized_target<size, big_endian>(&sparc_info),
      got_(NULL), plt_(NULL), rela_dyn_(NULL),
      copy_relocs_(elfcpp::R_SPARC_COPY), dynbss_(NULL),
      got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL)
  {
  }
 
  // Process the relocations to determine unreferenced sections for 
  // garbage collection.
  void
  gc_process_relocs(const General_options& options,
                    Symbol_table* symtab,
                    Layout* layout,
                    Sized_relobj<size, big_endian>* 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(const General_options& options,
              Symbol_table* symtab,
              Layout* layout,
              Sized_relobj<size, big_endian>* 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*);
 
  // 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<size, big_endian>*,
                   unsigned int sh_type,
                   const unsigned char* prelocs,
                   size_t reloc_count,
                   Output_section* output_section,
                   bool needs_special_offset_handling,
                   unsigned char* view,
                   typename elfcpp::Elf_types<size>::Elf_Addr view_address,
                   section_size_type view_size,
                   const Reloc_symbol_changes*);
 
  // Scan the relocs during a relocatable link.
  void
  scan_relocatable_relocs(const General_options& options,
                          Symbol_table* symtab,
                          Layout* layout,
                          Sized_relobj<size, big_endian>* 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*);
 
  // Relocate a section during a relocatable link.
  void
  relocate_for_relocatable(const Relocate_info<size, big_endian>*,
                           unsigned int sh_type,
                           const unsigned char* prelocs,
                           size_t reloc_count,
                           Output_section* output_section,
                           off_t offset_in_output_section,
                           const Relocatable_relocs*,
                           unsigned char* view,
                           typename elfcpp::Elf_types<size>::Elf_Addr view_address,
                           section_size_type view_size,
                           unsigned char* reloc_view,
                           section_size_type reloc_view_size);
  // Return whether SYM is defined by the ABI.
  bool
  do_is_defined_by_abi(const Symbol* sym) const
  {
    // XXX Really need to support this better...
    if (sym->type() == elfcpp::STT_SPARC_REGISTER)
      return 1;
 
    return strcmp(sym->name(), "___tls_get_addr") == 0;
  }
 
  // Return whether there is a GOT section.
  bool
  has_got_section() const
  { return this->got_ != NULL; }
 
  // Return the size of the GOT section.
  section_size_type
  got_size()
  {
    gold_assert(this->got_ != NULL);
    return this->got_->data_size();
  }
 
 private:
 
  // The class which scans relocations.
  class Scan
  {
  public:
    Scan()
      : issued_non_pic_error_(false)
    { }
 
    inline void
    local(const General_options& options, Symbol_table* symtab,
          Layout* layout, Target_sparc* target,
          Sized_relobj<size, big_endian>* object,
          unsigned int data_shndx,
          Output_section* output_section,
          const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
          const elfcpp::Sym<size, big_endian>& lsym);
 
    inline void
    global(const General_options& options, Symbol_table* symtab,
           Layout* layout, Target_sparc* target,
           Sized_relobj<size, big_endian>* object,
           unsigned int data_shndx,
           Output_section* output_section,
           const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
           Symbol* gsym);
 
  private:
    static void
    unsupported_reloc_local(Sized_relobj<size, big_endian>*,
                            unsigned int r_type);
 
    static void
    unsupported_reloc_global(Sized_relobj<size, big_endian>*,
                             unsigned int r_type, Symbol*);
 
    static void
    generate_tls_call(Symbol_table* symtab, Layout* layout,
                      Target_sparc* target);
 
    void
    check_non_pic(Relobj*, unsigned int r_type);
 
    // Whether we have issued an error about a non-PIC compilation.
    bool issued_non_pic_error_;
  };
 
  // The class which implements relocation.
  class Relocate
  {
   public:
    Relocate()
      : ignore_gd_add_(false)
    { }
 
    ~Relocate()
    {
      if (this->ignore_gd_add_)
        {
          // FIXME: This needs to specify the location somehow.
          gold_error(_("missing expected TLS relocation"));
        }
    }
 
    // Do a relocation.  Return false if the caller should not issue
    // any warnings about this relocation.
    inline bool
    relocate(const Relocate_info<size, big_endian>*, Target_sparc*,
             Output_section*, size_t relnum,
             const elfcpp::Rela<size, big_endian>&,
             unsigned int r_type, const Sized_symbol<size>*,
             const Symbol_value<size>*,
             unsigned char*,
             typename elfcpp::Elf_types<size>::Elf_Addr,
             section_size_type);
 
   private:
    // Do a TLS relocation.
    inline void
    relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target,
                 size_t relnum, const elfcpp::Rela<size, big_endian>&,
                 unsigned int r_type, const Sized_symbol<size>*,
                 const Symbol_value<size>*,
                 unsigned char*,
                 typename elfcpp::Elf_types<size>::Elf_Addr,
                 section_size_type);
 
    // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD
    bool ignore_gd_add_;
  };
 
  // 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*);
  };
 
  // Get the GOT section, creating it if necessary.
  Output_data_got<size, big_endian>*
  got_section(Symbol_table*, Layout*);
 
  // Create a PLT entry for a global symbol.
  void
  make_plt_entry(Symbol_table*, Layout*, Symbol*);
 
  // Create a GOT entry for the TLS module index.
  unsigned int
  got_mod_index_entry(Symbol_table* symtab, Layout* layout,
                      Sized_relobj<size, big_endian>* object);
 
  // Return the gsym for "__tls_get_addr".  Cache if not already
  // cached.
  Symbol*
  tls_get_addr_sym(Symbol_table* symtab)
  {
    if (!this->tls_get_addr_sym_)
      this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL);
    gold_assert(this->tls_get_addr_sym_);
    return this->tls_get_addr_sym_;
  }
 
  // Get the PLT section.
  const Output_data_plt_sparc<size, big_endian>*
  plt_section() const
  {
    gold_assert(this->plt_ != NULL);
    return this->plt_;
  }
 
  // Get the dynamic reloc section, creating it if necessary.
  Reloc_section*
  rela_dyn_section(Layout*);
 
  // Copy a relocation against a global symbol.
  void
  copy_reloc(Symbol_table* symtab, Layout* layout,
             Sized_relobj<size, big_endian>* object,
             unsigned int shndx, Output_section* output_section,
             Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
  {
    this->copy_relocs_.copy_reloc(symtab, layout,
                                  symtab->get_sized_symbol<size>(sym),
                                  object, shndx, output_section,
                                  reloc, this->rela_dyn_section(layout));
  }
 
  // Information about this specific target which we pass to the
  // general Target structure.
  static Target::Target_info sparc_info;
 
  // The types of GOT entries needed for this platform.
  enum Got_type
  {
    GOT_TYPE_STANDARD = 0,      // GOT entry for a regular symbol
    GOT_TYPE_TLS_OFFSET = 1,    // GOT entry for TLS offset
    GOT_TYPE_TLS_PAIR = 2,      // GOT entry for TLS module/offset pair
  };
 
  // The GOT section.
  Output_data_got<size, big_endian>* got_;
  // The PLT section.
  Output_data_plt_sparc<size, big_endian>* plt_;
  // The dynamic reloc section.
  Reloc_section* rela_dyn_;
  // Relocs saved to avoid a COPY reloc.
  Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
  // Space for variables copied with a COPY reloc.
  Output_data_space* dynbss_;
  // Offset of the GOT entry for the TLS module index;
  unsigned int got_mod_index_offset_;
  // Cached pointer to __tls_get_addr symbol
  Symbol* tls_get_addr_sym_;
};
 
template<>
Target::Target_info Target_sparc<32, true>::sparc_info =
{
  32,                   // size
  true,                 // is_big_endian
  elfcpp::EM_SPARC,     // machine_code
  false,                // has_make_symbol
  false,                // has_resolve
  false,                // has_code_fill
  true,                 // is_default_stack_executable
  '\0',                 // wrap_char
  "/usr/lib/ld.so.1",   // dynamic_linker
  0x00010000,           // default_text_segment_address
  64 * 1024,            // abi_pagesize (overridable by -z max-page-size)
  8 * 1024,             // common_pagesize (overridable by -z common-page-size)
  elfcpp::SHN_UNDEF,    // small_common_shndx
  elfcpp::SHN_UNDEF,    // large_common_shndx
  0,                     // small_common_section_flags
 
};
 
template<>
Target::Target_info Target_sparc<64, true>::sparc_info =
{
  64,                   // size
  true,                 // is_big_endian
  elfcpp::EM_SPARCV9,   // machine_code
  false,                // has_make_symbol
  false,                // has_resolve
  false,                // has_code_fill
  true,                 // is_default_stack_executable
  '\0',                 // wrap_char
  "/usr/lib/sparcv9/ld.so.1",   // dynamic_linker
  0x100000,             // default_text_segment_address
  64 * 1024,            // abi_pagesize (overridable by -z max-page-size)
  8 * 1024,             // common_pagesize (overridable by -z common-page-size)
  elfcpp::SHN_UNDEF,    // small_common_shndx
  elfcpp::SHN_UNDEF,    // large_common_shndx
  0,                     // small_common_section_flags
 
};
 
// We have to take care here, even when operating in little-endian
// mode, sparc instructions are still big endian.
template<int size, bool big_endian>
class Sparc_relocate_functions
{
private:
  // Do a simple relocation with the addend in the relocation.
  template<int valsize>
  static inline void
  rela(unsigned char* view,
       unsigned int right_shift,
       typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
       typename elfcpp::Swap<size, big_endian>::Valtype value,
       typename elfcpp::Swap<size, big_endian>::Valtype addend)
  {
    typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
    Valtype reloc = ((value + addend) >> right_shift);
 
    val &= ~dst_mask;
    reloc &= dst_mask;
 
    elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
  }
 
  // Do a simple relocation using a symbol value with the addend in
  // the relocation.
  template<int valsize>
  static inline void
  rela(unsigned char* view,
       unsigned int right_shift,
       typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
  {
    typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
    Valtype reloc = (psymval->value(object, addend) >> right_shift);
 
    val &= ~dst_mask;
    reloc &= dst_mask;
 
    elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
  }
 
  // Do a simple relocation using a symbol value with the addend in
  // the relocation, unaligned.
  template<int valsize>
  static inline void
  rela_ua(unsigned char* view,
          unsigned int right_shift, elfcpp::Elf_Xword dst_mask,
          const Sized_relobj<size, big_endian>* object,
          const Symbol_value<size>* psymval,
          typename elfcpp::Swap<size, big_endian>::Valtype addend)
  {
    typedef typename elfcpp::Swap_unaligned<valsize,
            big_endian>::Valtype Valtype;
    unsigned char* wv = view;
    Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
    Valtype reloc = (psymval->value(object, addend) >> right_shift);
 
    val &= ~dst_mask;
    reloc &= dst_mask;
 
    elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
  }
 
  // Do a simple PC relative relocation with a Symbol_value with the
  // addend in the relocation.
  template<int valsize>
  static inline void
  pcrela(unsigned char* view,
         unsigned int right_shift,
         typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
         const Sized_relobj<size, big_endian>* object,
         const Symbol_value<size>* psymval,
         typename elfcpp::Swap<size, big_endian>::Valtype addend,
         typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
    Valtype reloc = ((psymval->value(object, addend) - address)
                     >> right_shift);
 
    val &= ~dst_mask;
    reloc &= dst_mask;
 
    elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
  }
 
  template<int valsize>
  static inline void
  pcrela_unaligned(unsigned char* view,
                   const Sized_relobj<size, big_endian>* object,
                   const Symbol_value<size>* psymval,
                   typename elfcpp::Swap<size, big_endian>::Valtype addend,
                   typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    typedef typename elfcpp::Swap_unaligned<valsize,
            big_endian>::Valtype Valtype;
    unsigned char* wv = view;
    Valtype reloc = (psymval->value(object, addend) - address);
 
    elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
  }
 
  typedef Sparc_relocate_functions<size, big_endian> This;
  typedef Sparc_relocate_functions<size, true> This_insn;
 
public:
  // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2
  static inline void
  wdisp30(unsigned char* view,
           const Sized_relobj<size, big_endian>* object,
           const Symbol_value<size>* psymval,
           typename elfcpp::Elf_types<size>::Elf_Addr addend,
           typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 2, 0x3fffffff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2
  static inline void
  wdisp22(unsigned char* view,
           const Sized_relobj<size, big_endian>* object,
           const Symbol_value<size>* psymval,
           typename elfcpp::Elf_types<size>::Elf_Addr addend,
           typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 2, 0x003fffff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2
  static inline void
  wdisp19(unsigned char* view,
          const Sized_relobj<size, big_endian>* object,
          const Symbol_value<size>* psymval,
          typename elfcpp::Elf_types<size>::Elf_Addr addend,
          typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 2, 0x0007ffff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2
  static inline void
  wdisp16(unsigned char* view,
          const Sized_relobj<size, big_endian>* object,
          const Symbol_value<size>* psymval,
          typename elfcpp::Elf_types<size>::Elf_Addr addend,
          typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = ((psymval->value(object, addend) - address)
                     >> 2);
 
    // The relocation value is split between the low 14 bits,
    // and bits 20-21.
    val &= ~((0x3 << 20) | 0x3fff);
    reloc = (((reloc & 0xc000) << (20 - 14))
             | (reloc & 0x3ffff));
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
 
  // R_SPARC_PC22: (Symbol + Addend - Address) >> 10
  static inline void
  pc22(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend,
       typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff
  static inline void
  pc10(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend,
       typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_HI22: (Symbol + Addend) >> 10
  static inline void
  hi22(unsigned char* view,
       typename elfcpp::Elf_types<size>::Elf_Addr value,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 10, 0x003fffff, value, addend);
  }
 
  // R_SPARC_HI22: (Symbol + Addend) >> 10
  static inline void
  hi22(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend);
  }
 
  // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10
  static inline void
  pcplt22(unsigned char* view,
          const Sized_relobj<size, big_endian>* object,
          const Symbol_value<size>* psymval,
          typename elfcpp::Elf_types<size>::Elf_Addr addend,
          typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
  static inline void
  lo10(unsigned char* view,
       typename elfcpp::Elf_types<size>::Elf_Addr value,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x000003ff, value, addend);
  }
 
  // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
  static inline void
  lo10(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
  }
 
  // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
  static inline void
  lo10(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend,
       typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2
  static inline void
  olo10(unsigned char* view,
        const Sized_relobj<size, big_endian>* object,
        const Symbol_value<size>* psymval,
        typename elfcpp::Elf_types<size>::Elf_Addr addend,
        typename elfcpp::Elf_types<size>::Elf_Addr addend2)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = psymval->value(object, addend);
 
    val &= ~0x1fff;
    reloc &= 0x3ff;
    reloc += addend2;
    reloc &= 0x1fff;
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
 
  // R_SPARC_22: (Symbol + Addend)
  static inline void
  rela32_22(unsigned char* view,
            const Sized_relobj<size, big_endian>* object,
            const Symbol_value<size>* psymval,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend);
  }
 
  // R_SPARC_13: (Symbol + Addend)
  static inline void
  rela32_13(unsigned char* view,
            typename elfcpp::Elf_types<size>::Elf_Addr value,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x00001fff, value, addend);
  }
 
  // R_SPARC_13: (Symbol + Addend)
  static inline void
  rela32_13(unsigned char* view,
            const Sized_relobj<size, big_endian>* object,
            const Symbol_value<size>* psymval,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend);
  }
 
  // R_SPARC_UA16: (Symbol + Addend)
  static inline void
  ua16(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend);
  }
 
  // R_SPARC_UA32: (Symbol + Addend)
  static inline void
  ua32(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend);
  }
 
  // R_SPARC_UA64: (Symbol + Addend)
  static inline void
  ua64(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0,
                               object, psymval, addend);
  }
 
  // R_SPARC_DISP8: (Symbol + Addend - Address)
  static inline void
  disp8(unsigned char* view,
        const Sized_relobj<size, big_endian>* object,
        const Symbol_value<size>* psymval,
        typename elfcpp::Elf_types<size>::Elf_Addr addend,
        typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This::template pcrela_unaligned<8>(view, object, psymval,
                                       addend, address);
  }
 
  // R_SPARC_DISP16: (Symbol + Addend - Address)
  static inline void
  disp16(unsigned char* view,
         const Sized_relobj<size, big_endian>* object,
         const Symbol_value<size>* psymval,
         typename elfcpp::Elf_types<size>::Elf_Addr addend,
         typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This::template pcrela_unaligned<16>(view, object, psymval,
                                        addend, address);
  }
 
  // R_SPARC_DISP32: (Symbol + Addend - Address)
  static inline void
  disp32(unsigned char* view,
         const Sized_relobj<size, big_endian>* object,
         const Symbol_value<size>* psymval,
         typename elfcpp::Elf_types<size>::Elf_Addr addend,
         typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This::template pcrela_unaligned<32>(view, object, psymval,
                                        addend, address);
  }
 
  // R_SPARC_DISP64: (Symbol + Addend - Address)
  static inline void
  disp64(unsigned char* view,
         const Sized_relobj<size, big_endian>* object,
         const Symbol_value<size>* psymval,
         elfcpp::Elf_Xword addend,
         typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This::template pcrela_unaligned<64>(view, object, psymval,
                                        addend, address);
  }
 
  // R_SPARC_H44: (Symbol + Addend) >> 22
  static inline void
  h44(unsigned char* view,
      const Sized_relobj<size, big_endian>* object,
      const Symbol_value<size>* psymval,
      typename elfcpp::Elf_types<size>::Elf_Addr  addend)
  {
    This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend);
  }
 
  // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff
  static inline void
  m44(unsigned char* view,
      const Sized_relobj<size, big_endian>* object,
      const Symbol_value<size>* psymval,
      typename elfcpp::Elf_types<size>::Elf_Addr  addend)
  {
    This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend);
  }
 
  // R_SPARC_L44: (Symbol + Addend) & 0xfff
  static inline void
  l44(unsigned char* view,
      const Sized_relobj<size, big_endian>* object,
      const Symbol_value<size>* psymval,
      typename elfcpp::Elf_types<size>::Elf_Addr  addend)
  {
    This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend);
  }
 
  // R_SPARC_HH22: (Symbol + Addend) >> 42
  static inline void
  hh22(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend);
  }
 
  // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42
  static inline void
  pc_hh22(unsigned char* view,
          const Sized_relobj<size, big_endian>* object,
          const Symbol_value<size>* psymval,
          typename elfcpp::Elf_types<size>::Elf_Addr addend,
          typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 42, 0x003fffff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff
  static inline void
  hm10(unsigned char* view,
       const Sized_relobj<size, big_endian>* object,
       const Symbol_value<size>* psymval,
       typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend);
  }
 
  // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff
  static inline void
  pc_hm10(unsigned char* view,
          const Sized_relobj<size, big_endian>* object,
          const Symbol_value<size>* psymval,
          typename elfcpp::Elf_types<size>::Elf_Addr addend,
          typename elfcpp::Elf_types<size>::Elf_Addr address)
  {
    This_insn::template pcrela<32>(view, 32, 0x000003ff, object,
                                   psymval, addend, address);
  }
 
  // R_SPARC_11: (Symbol + Addend)
  static inline void
  rela32_11(unsigned char* view,
            const Sized_relobj<size, big_endian>* object,
            const Symbol_value<size>* psymval,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend);
  }
 
  // R_SPARC_10: (Symbol + Addend)
  static inline void
  rela32_10(unsigned char* view,
            const Sized_relobj<size, big_endian>* object,
            const Symbol_value<size>* psymval,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
  }
 
  // R_SPARC_7: (Symbol + Addend)
  static inline void
  rela32_7(unsigned char* view,
           const Sized_relobj<size, big_endian>* object,
           const Symbol_value<size>* psymval,
           typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend);
  }
 
  // R_SPARC_6: (Symbol + Addend)
  static inline void
  rela32_6(unsigned char* view,
           const Sized_relobj<size, big_endian>* object,
           const Symbol_value<size>* psymval,
           typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend);
  }
 
  // R_SPARC_5: (Symbol + Addend)
  static inline void
  rela32_5(unsigned char* view,
           const Sized_relobj<size, big_endian>* object,
           const Symbol_value<size>* psymval,
           typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend);
  }
 
  // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10
  static inline void
  ldo_hix22(unsigned char* view,
            typename elfcpp::Elf_types<size>::Elf_Addr value,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    This_insn::hi22(view, value, addend);
  }
 
  // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff
  static inline void
  ldo_lox10(unsigned char* view,
            typename elfcpp::Elf_types<size>::Elf_Addr value,
            typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = (value + addend);
 
    val &= ~0x1fff;
    reloc &= 0x3ff;
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
 
  // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10
  static inline void
  hix22(unsigned char* view,
        typename elfcpp::Elf_types<size>::Elf_Addr value,
        typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = (value + addend);
 
    val &= ~0x3fffff;
 
    reloc ^= ~(Valtype)0;
    reloc >>= 10;
 
    reloc &= 0x3fffff;
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
 
  // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10
  static inline void
  hix22(unsigned char* view,
        const Sized_relobj<size, big_endian>* object,
        const Symbol_value<size>* psymval,
        typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = psymval->value(object, addend);
 
    val &= ~0x3fffff;
 
    reloc ^= ~(Valtype)0;
    reloc >>= 10;
 
    reloc &= 0x3fffff;
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
 
 
  // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00
  static inline void
  lox10(unsigned char* view,
        typename elfcpp::Elf_types<size>::Elf_Addr value,
        typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = (value + addend);
 
    val &= ~0x1fff;
    reloc &= 0x3ff;
    reloc |= 0x1c00;
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
 
  // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00
  static inline void
  lox10(unsigned char* view,
        const Sized_relobj<size, big_endian>* object,
        const Symbol_value<size>* psymval,
        typename elfcpp::Elf_types<size>::Elf_Addr addend)
  {
    typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
    Valtype* wv = reinterpret_cast<Valtype*>(view);
    Valtype val = elfcpp::Swap<32, true>::readval(wv);
    Valtype reloc = psymval->value(object, addend);
 
    val &= ~0x1fff;
    reloc &= 0x3ff;
    reloc |= 0x1c00;
 
    elfcpp::Swap<32, true>::writeval(wv, val | reloc);
  }
};
 
// Get the GOT section, creating it if necessary.
 
template<int size, bool big_endian>
Output_data_got<size, big_endian>*
Target_sparc<size, big_endian>::got_section(Symbol_table* symtab,
                                            Layout* layout)
{
  if (this->got_ == NULL)
    {
      gold_assert(symtab != NULL && layout != NULL);
 
      this->got_ = new Output_data_got<size, big_endian>();
 
      Output_section* os;
      os = layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
                                           (elfcpp::SHF_ALLOC
                                            | elfcpp::SHF_WRITE),
                                           this->got_, false);
      os->set_is_relro();
 
      // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
      symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
                                    this->got_,
                                    0, 0, elfcpp::STT_OBJECT,
                                    elfcpp::STB_LOCAL,
                                    elfcpp::STV_HIDDEN, 0,
                                    false, false);
    }
 
  return this->got_;
}
 
// Get the dynamic reloc section, creating it if necessary.
 
template<int size, bool big_endian>
typename Target_sparc<size, big_endian>::Reloc_section*
Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout)
{
  if (this->rela_dyn_ == NULL)
    {
      gold_assert(layout != NULL);
      this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
      layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
                                      elfcpp::SHF_ALLOC, this->rela_dyn_, true);
    }
  return this->rela_dyn_;
}
 
// A class to handle the PLT data.
 
template<int size, bool big_endian>
class Output_data_plt_sparc : public Output_section_data
{
 public:
  typedef Output_data_reloc<elfcpp::SHT_RELA, true,
                            size, big_endian> Reloc_section;
 
  Output_data_plt_sparc(Layout*);
 
  // Add an entry to the PLT.
  void add_entry(Symbol* gsym);
 
  // Return the .rela.plt section data.
  const Reloc_section* rel_plt() const
  {
    return this->rel_;
  }
 
 protected:
  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")); }
 
 private:
  // The size of an entry in the PLT.
  static const int base_plt_entry_size = (size == 32 ? 12 : 32);
 
  static const unsigned int plt_entries_per_block = 160;
  static const unsigned int plt_insn_chunk_size = 24;
  static const unsigned int plt_pointer_chunk_size = 8;
  static const unsigned int plt_block_size =
    (plt_entries_per_block
     * (plt_insn_chunk_size + plt_pointer_chunk_size));
 
  // Set the final size.
  void
  set_final_data_size()
  {
    unsigned int full_count = this->count_ + 4;
    unsigned int extra = (size == 32 ? 4 : 0);
 
    if (size == 32 || full_count < 32768)
      this->set_data_size((full_count * base_plt_entry_size) + extra);
    else
      {
        unsigned int ext_cnt = full_count - 32768;
 
        this->set_data_size((32768 * base_plt_entry_size)
                            + (ext_cnt
                               * (plt_insn_chunk_size
                                  + plt_pointer_chunk_size)));
      }
  }
 
  // Write out the PLT data.
  void
  do_write(Output_file*);
 
  // The reloc section.
  Reloc_section* rel_;
  // The number of PLT entries.
  unsigned int count_;
};
 
// Define the constants as required by C++ standard.
 
template<int size, bool big_endian>
const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size;
 
template<int size, bool big_endian>
const unsigned int
Output_data_plt_sparc<size, big_endian>::plt_entries_per_block;
 
template<int size, bool big_endian>
const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size;
 
template<int size, bool big_endian>
const unsigned int
Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size;
 
template<int size, bool big_endian>
const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size;
 
// Create the PLT section.  The ordinary .got section is an argument,
// since we need to refer to the start.
 
template<int size, bool big_endian>
Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
  : Output_section_data(size == 32 ? 4 : 8), count_(0)
{
  this->rel_ = new Reloc_section(false);
  layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
                                  elfcpp::SHF_ALLOC, this->rel_, true);
}
 
template<int size, bool big_endian>
void
Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os)
{
  os->set_entsize(0);
}
 
// Add an entry to the PLT.
 
template<int size, bool big_endian>
void
Output_data_plt_sparc<size, big_endian>::add_entry(Symbol* gsym)
{
  gold_assert(!gsym->has_plt_offset());
 
  unsigned int index = this->count_ + 4;
  section_offset_type plt_offset;
 
  if (size == 32 || index < 32768)
    plt_offset = index * base_plt_entry_size;
  else
    {
        unsigned int ext_index = index - 32768;
 
        plt_offset = (32768 * base_plt_entry_size)
          + ((ext_index / plt_entries_per_block)
             * plt_block_size)
          + ((ext_index % plt_entries_per_block)
             * plt_insn_chunk_size);
    }
 
  gsym->set_plt_offset(plt_offset);
 
  ++this->count_;
 
  // Every PLT entry needs a reloc.
  gsym->set_needs_dynsym_entry();
  this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this,
                         plt_offset, 0);
 
  // 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.
}
 
static const unsigned int sparc_nop = 0x01000000;
static const unsigned int sparc_sethi_g1 = 0x03000000;
static const unsigned int sparc_branch_always = 0x30800000;
static const unsigned int sparc_branch_always_pt = 0x30680000;
static const unsigned int sparc_mov = 0x80100000;
static const unsigned int sparc_mov_g0_o0 = 0x90100000;
static const unsigned int sparc_mov_o7_g5 = 0x8a10000f;
static const unsigned int sparc_call_plus_8 = 0x40000002;
static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000;
static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001;
static const unsigned int sparc_mov_g5_o7 = 0x9e100005;
 
// Write out the PLT.
 
template<int size, bool big_endian>
void
Output_data_plt_sparc<size, big_endian>::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);
  unsigned char* pov = oview;
 
  memset(pov, 0, base_plt_entry_size * 4);
  pov += base_plt_entry_size * 4;
 
  unsigned int plt_offset = base_plt_entry_size * 4;
  const unsigned int count = this->count_;
 
  if (size == 64)
    {
      unsigned int limit;
 
      limit = (count > 32768 ? 32768 : count);
 
      for (unsigned int i = 0; i < limit; ++i)
        {
          elfcpp::Swap<32, true>::writeval(pov + 0x00,
                                           sparc_sethi_g1 + plt_offset);
          elfcpp::Swap<32, true>::writeval(pov + 0x04,
                                           sparc_branch_always_pt +
                                           (((base_plt_entry_size -
                                              (plt_offset + 4)) >> 2) &
                                            0x7ffff));
          elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
          elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop);
          elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop);
          elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop);
          elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop);
          elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop);
 
          pov += base_plt_entry_size;
          plt_offset += base_plt_entry_size;
        }
 
      if (count > 32768)
        {
          unsigned int ext_cnt = count - 32768;
          unsigned int blks = ext_cnt / plt_entries_per_block;
 
          for (unsigned int i = 0; i < blks; ++i)
            {
              unsigned int data_off = (plt_entries_per_block
                                       * plt_insn_chunk_size) - 4;
 
              for (unsigned int j = 0; j < plt_entries_per_block; ++j)
                {
                  elfcpp::Swap<32, true>::writeval(pov + 0x00,
                                                   sparc_mov_o7_g5);
                  elfcpp::Swap<32, true>::writeval(pov + 0x04,
                                                   sparc_call_plus_8);
                  elfcpp::Swap<32, true>::writeval(pov + 0x08,
                                                   sparc_nop);
                  elfcpp::Swap<32, true>::writeval(pov + 0x0c,
                                                   sparc_ldx_o7_imm_g1 +
                                                   (data_off & 0x1fff));
                  elfcpp::Swap<32, true>::writeval(pov + 0x10,
                                                   sparc_jmpl_o7_g1_g1);
                  elfcpp::Swap<32, true>::writeval(pov + 0x14,
                                                   sparc_mov_g5_o7);
 
                  elfcpp::Swap<64, big_endian>::writeval(
                                pov + 0x4 + data_off,
                                (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
 
                  pov += plt_insn_chunk_size;
                  data_off -= 16;
                }
            }
 
          unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block;
          for (unsigned int i = 0; i < sub_blk_cnt; ++i)
            {
              unsigned int data_off = (sub_blk_cnt
                                       * plt_insn_chunk_size) - 4;
 
              for (unsigned int j = 0; j < plt_entries_per_block; ++j)
                {
                  elfcpp::Swap<32, true>::writeval(pov + 0x00,
                                                   sparc_mov_o7_g5);
                  elfcpp::Swap<32, true>::writeval(pov + 0x04,
                                                   sparc_call_plus_8);
                  elfcpp::Swap<32, true>::writeval(pov + 0x08,
                                                   sparc_nop);
                  elfcpp::Swap<32, true>::writeval(pov + 0x0c,
                                                   sparc_ldx_o7_imm_g1 +
                                                   (data_off & 0x1fff));
                  elfcpp::Swap<32, true>::writeval(pov + 0x10,
                                                   sparc_jmpl_o7_g1_g1);
                  elfcpp::Swap<32, true>::writeval(pov + 0x14,
                                                   sparc_mov_g5_o7);
 
                  elfcpp::Swap<64, big_endian>::writeval(
                                pov + 0x4 + data_off,
                                (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
 
                  pov += plt_insn_chunk_size;
                  data_off -= 16;
                }
            }
        }
    }
  else
    {
      for (unsigned int i = 0; i < count; ++i)
        {
          elfcpp::Swap<32, true>::writeval(pov + 0x00,
                                           sparc_sethi_g1 + plt_offset);
          elfcpp::Swap<32, true>::writeval(pov + 0x04,
                                           sparc_branch_always +
                                           (((- (plt_offset + 4)) >> 2) &
                                            0x003fffff));
          elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
 
          pov += base_plt_entry_size;
          plt_offset += base_plt_entry_size;
        }
 
      elfcpp::Swap<32, true>::writeval(pov, sparc_nop);
      pov += 4;
    }
 
  gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
 
  of->write_output_view(offset, oview_size, oview);
}
 
// Create a PLT entry for a global symbol.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
                                               Layout* layout,
                                               Symbol* gsym)
{
  if (gsym->has_plt_offset())
    return;
 
  if (this->plt_ == NULL)
    {
      // Create the GOT sections first.
      this->got_section(symtab, layout);
 
      this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout);
      layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
                                      (elfcpp::SHF_ALLOC
                                       | elfcpp::SHF_EXECINSTR
                                       | elfcpp::SHF_WRITE),
                                      this->plt_, false);
 
      // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
      symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
                                    this->plt_,
                                    0, 0, elfcpp::STT_OBJECT,
                                    elfcpp::STB_LOCAL,
                                    elfcpp::STV_HIDDEN, 0,
                                    false, false);
    }
 
  this->plt_->add_entry(gsym);
}
 
// Create a GOT entry for the TLS module index.
 
template<int size, bool big_endian>
unsigned int
Target_sparc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab,
                                                    Layout* layout,
                                                    Sized_relobj<size, big_endian>* object)
{
  if (this->got_mod_index_offset_ == -1U)
    {
      gold_assert(symtab != NULL && layout != NULL && object != NULL);
      Reloc_section* rela_dyn = this->rela_dyn_section(layout);
      Output_data_got<size, big_endian>* got;
      unsigned int got_offset;
 
      got = this->got_section(symtab, layout);
      got_offset = got->add_constant(0);
      rela_dyn->add_local(object, 0,
                          (size == 64 ?
                           elfcpp::R_SPARC_TLS_DTPMOD64 :
                           elfcpp::R_SPARC_TLS_DTPMOD32), got,
                          got_offset, 0);
      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.
 
static tls::Tls_optimization
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_SPARC_TLS_GD_HI22: // Global-dynamic
    case elfcpp::R_SPARC_TLS_GD_LO10:
    case elfcpp::R_SPARC_TLS_GD_ADD:
    case elfcpp::R_SPARC_TLS_GD_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_SPARC_TLS_LDM_HI22:  // Local-dynamic
    case elfcpp::R_SPARC_TLS_LDM_LO10:
    case elfcpp::R_SPARC_TLS_LDM_ADD:
    case elfcpp::R_SPARC_TLS_LDM_CALL:
      // 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_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
    case elfcpp::R_SPARC_TLS_LDO_LOX10:
    case elfcpp::R_SPARC_TLS_LDO_ADD:
      // Another type of Local-Dynamic relocation.
      return tls::TLSOPT_TO_LE;
 
    case elfcpp::R_SPARC_TLS_IE_HI22:   // Initial-exec
    case elfcpp::R_SPARC_TLS_IE_LO10:
    case elfcpp::R_SPARC_TLS_IE_LD:
    case elfcpp::R_SPARC_TLS_IE_LDX:
    case elfcpp::R_SPARC_TLS_IE_ADD:
      // 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_SPARC_TLS_LE_HIX22:  // Local-exec
    case elfcpp::R_SPARC_TLS_LE_LOX10:
      // When we already have Local-Exec, there is nothing further we
      // can do.
      return tls::TLSOPT_NONE;
 
    default:
      gold_unreachable();
    }
}
 
// Generate a PLT entry slot for a call to __tls_get_addr
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab,
                                                        Layout* layout,
                                                        Target_sparc<size, big_endian>* target)
{
  Symbol* gsym = target->tls_get_addr_sym(symtab);
 
  target->make_plt_entry(symtab, layout, gsym);
}
 
// Report an unsupported relocation against a local symbol.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::Scan::unsupported_reloc_local(
                        Sized_relobj<size, big_endian>* object,
                        unsigned int r_type)
{
  gold_error(_("%s: unsupported reloc %u against local symbol"),
             object->name().c_str(), r_type);
}
 
// We are about to emit a dynamic relocation of type R_TYPE.  If the
// dynamic linker does not support it, issue an error.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type)
{
  gold_assert(r_type != elfcpp::R_SPARC_NONE);
 
  if (size == 64)
    {
      switch (r_type)
        {
          // These are the relocation types supported by glibc for sparc 64-bit.
        case elfcpp::R_SPARC_RELATIVE:
        case elfcpp::R_SPARC_COPY:
        case elfcpp::R_SPARC_64:
        case elfcpp::R_SPARC_GLOB_DAT:
        case elfcpp::R_SPARC_JMP_SLOT:
        case elfcpp::R_SPARC_TLS_DTPMOD64:
        case elfcpp::R_SPARC_TLS_DTPOFF64:
        case elfcpp::R_SPARC_TLS_TPOFF64:
        case elfcpp::R_SPARC_TLS_LE_HIX22:
        case elfcpp::R_SPARC_TLS_LE_LOX10:
        case elfcpp::R_SPARC_8:
        case elfcpp::R_SPARC_16:
        case elfcpp::R_SPARC_DISP8:
        case elfcpp::R_SPARC_DISP16:
        case elfcpp::R_SPARC_DISP32:
        case elfcpp::R_SPARC_WDISP30:
        case elfcpp::R_SPARC_LO10:
        case elfcpp::R_SPARC_HI22:
        case elfcpp::R_SPARC_OLO10:
        case elfcpp::R_SPARC_H44:
        case elfcpp::R_SPARC_M44:
        case elfcpp::R_SPARC_L44:
        case elfcpp::R_SPARC_HH22:
        case elfcpp::R_SPARC_HM10:
        case elfcpp::R_SPARC_LM22:
        case elfcpp::R_SPARC_UA16:
        case elfcpp::R_SPARC_UA32:
        case elfcpp::R_SPARC_UA64:
          return;
 
        default:
          break;
        }
    }
  else
    {
      switch (r_type)
        {
          // These are the relocation types supported by glibc for sparc 32-bit.
        case elfcpp::R_SPARC_RELATIVE:
        case elfcpp::R_SPARC_COPY:
        case elfcpp::R_SPARC_GLOB_DAT:
        case elfcpp::R_SPARC_32:
        case elfcpp::R_SPARC_JMP_SLOT:
        case elfcpp::R_SPARC_TLS_DTPMOD32:
        case elfcpp::R_SPARC_TLS_DTPOFF32:
        case elfcpp::R_SPARC_TLS_TPOFF32:
        case elfcpp::R_SPARC_TLS_LE_HIX22:
        case elfcpp::R_SPARC_TLS_LE_LOX10:
        case elfcpp::R_SPARC_8:
        case elfcpp::R_SPARC_16:
        case elfcpp::R_SPARC_DISP8:
        case elfcpp::R_SPARC_DISP16:
        case elfcpp::R_SPARC_DISP32:
        case elfcpp::R_SPARC_LO10:
        case elfcpp::R_SPARC_WDISP30:
        case elfcpp::R_SPARC_HI22:
        case elfcpp::R_SPARC_UA16:
        case elfcpp::R_SPARC_UA32:
          return;
 
        default:
          break;
        }
    }
 
  // This prevents us from issuing more than one error per reloc
  // section.  But we can still wind up issuing more than one
  // error per object file.
  if (this->issued_non_pic_error_)
    return;
  gold_assert(parameters->options().output_is_position_independent());
  object->error(_("requires unsupported dynamic reloc; "
                  "recompile with -fPIC"));
  this->issued_non_pic_error_ = true;
  return;
}
 
// Scan a relocation for a local symbol.
 
template<int size, bool big_endian>
inline void
Target_sparc<size, big_endian>::Scan::local(
                        const General_options&,
                        Symbol_table* symtab,
                        Layout* layout,
                        Target_sparc<size, big_endian>* target,
                        Sized_relobj<size, big_endian>* object,
                        unsigned int data_shndx,
                        Output_section* output_section,
                        const elfcpp::Rela<size, big_endian>& reloc,
                        unsigned int r_type,
                        const elfcpp::Sym<size, big_endian>& lsym)
{
  unsigned int orig_r_type = r_type;
 
  r_type &= 0xff;
  switch (r_type)
    {
    case elfcpp::R_SPARC_NONE:
    case elfcpp::R_SPARC_REGISTER:
    case elfcpp::R_SPARC_GNU_VTINHERIT:
    case elfcpp::R_SPARC_GNU_VTENTRY:
      break;
 
    case elfcpp::R_SPARC_64:
    case elfcpp::R_SPARC_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_SPARC_RELATIVE relocation so the dynamic loader can
      // relocate it easily.
      if (parameters->options().output_is_position_independent())
        {
          Reloc_section* rela_dyn = target->rela_dyn_section(layout);
          unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
          rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
                                       output_section, data_shndx,
                                       reloc.get_r_offset(),
                                       reloc.get_r_addend());
        }
      break;
 
    case elfcpp::R_SPARC_HIX22:
    case elfcpp::R_SPARC_LOX10:
    case elfcpp::R_SPARC_H44:
    case elfcpp::R_SPARC_M44:
    case elfcpp::R_SPARC_L44:
    case elfcpp::R_SPARC_HH22:
    case elfcpp::R_SPARC_HM10:
    case elfcpp::R_SPARC_LM22:
    case elfcpp::R_SPARC_UA64:
    case elfcpp::R_SPARC_UA32:
    case elfcpp::R_SPARC_UA16:
    case elfcpp::R_SPARC_HI22:
    case elfcpp::R_SPARC_LO10:
    case elfcpp::R_SPARC_OLO10:
    case elfcpp::R_SPARC_16:
    case elfcpp::R_SPARC_11:
    case elfcpp::R_SPARC_10:
    case elfcpp::R_SPARC_8:
    case elfcpp::R_SPARC_7:
    case elfcpp::R_SPARC_6:
    case elfcpp::R_SPARC_5:
      // If building a shared library (or a position-independent
      // executable), we need to create a dynamic relocation for
      // this location.
      if (parameters->options().output_is_position_independent())
        {
          Reloc_section* rela_dyn = target->rela_dyn_section(layout);
 
          check_non_pic(object, r_type);
          if (lsym.get_st_type() != elfcpp::STT_SECTION)
            {
              unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
              rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
                                  data_shndx, reloc.get_r_offset(),
                                  reloc.get_r_addend());
            }
          else
            {
              unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
              gold_assert(lsym.get_st_value() == 0);
              rela_dyn->add_local_relative(object, r_sym, orig_r_type,
                                           output_section, data_shndx,
                                           reloc.get_r_offset(),
                                           reloc.get_r_addend());
            }
        }
      break;
 
    case elfcpp::R_SPARC_WDISP30:
    case elfcpp::R_SPARC_WDISP22:
    case elfcpp::R_SPARC_WDISP19:
    case elfcpp::R_SPARC_WDISP16:
    case elfcpp::R_SPARC_DISP8:
    case elfcpp::R_SPARC_DISP16:
    case elfcpp::R_SPARC_DISP32:
    case elfcpp::R_SPARC_DISP64:
    case elfcpp::R_SPARC_PC10:
    case elfcpp::R_SPARC_PC22:
      break;
 
    case elfcpp::R_SPARC_GOT10:
    case elfcpp::R_SPARC_GOT13:
    case elfcpp::R_SPARC_GOT22:
      {
        // The symbol requires a GOT entry.
        Output_data_got<size, big_endian>* got;
        unsigned int r_sym;
 
        got = target->got_section(symtab, layout);
        r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
 
        // If we are generating a shared object, we need to add a
        // dynamic relocation for this symbol's GOT entry.
        if (parameters->options().output_is_position_independent())
          {
            if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
              {
                Reloc_section* rela_dyn = target->rela_dyn_section(layout);
                unsigned int off;
 
                off = got->add_constant(0);
                object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
                rela_dyn->add_local_relative(object, r_sym,
                                             elfcpp::R_SPARC_RELATIVE,
                                             got, off, 0);
              }
          }
        else
          got->add_local(object, r_sym, GOT_TYPE_STANDARD);
      }
      break;
 
      // These are initial TLS relocs, which are expected when
      // linking.
    case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
    case elfcpp::R_SPARC_TLS_GD_LO10:
    case elfcpp::R_SPARC_TLS_GD_ADD:
    case elfcpp::R_SPARC_TLS_GD_CALL:
    case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
    case elfcpp::R_SPARC_TLS_LDM_LO10:
    case elfcpp::R_SPARC_TLS_LDM_ADD:
    case elfcpp::R_SPARC_TLS_LDM_CALL:
    case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
    case elfcpp::R_SPARC_TLS_LDO_LOX10:
    case elfcpp::R_SPARC_TLS_LDO_ADD:
    case elfcpp::R_SPARC_TLS_IE_HI22:   // Initial-exec
    case elfcpp::R_SPARC_TLS_IE_LO10:
    case elfcpp::R_SPARC_TLS_IE_LD:
    case elfcpp::R_SPARC_TLS_IE_LDX:
    case elfcpp::R_SPARC_TLS_IE_ADD:
    case elfcpp::R_SPARC_TLS_LE_HIX22:  // Local-exec
    case elfcpp::R_SPARC_TLS_LE_LOX10:
      {
        bool output_is_shared = parameters->options().shared();
        const tls::Tls_optimization optimized_type
            = optimize_tls_reloc(!output_is_shared, r_type);
        switch (r_type)
          {
          case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
          case elfcpp::R_SPARC_TLS_GD_LO10:
          case elfcpp::R_SPARC_TLS_GD_ADD:
          case elfcpp::R_SPARC_TLS_GD_CALL:
            if (optimized_type == tls::TLSOPT_NONE)
              {
                // Create a pair of GOT entries for the module index and
                // dtv-relative offset.
                Output_data_got<size, big_endian>* got
                    = target->got_section(symtab, layout);
                unsigned int r_sym = elfcpp::elf_r_sym<size>(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_rela(object, r_sym,
                                                lsym.get_st_shndx(),
                                                GOT_TYPE_TLS_PAIR,
                                                target->rela_dyn_section(layout),
                                                (size == 64
                                                 ? elfcpp::R_SPARC_TLS_DTPMOD64
                                                 : elfcpp::R_SPARC_TLS_DTPMOD32),
                                                 0);
                if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
                  generate_tls_call(symtab, layout, target);
              }
            else if (optimized_type != tls::TLSOPT_TO_LE)
              unsupported_reloc_local(object, r_type);
            break;
 
          case elfcpp::R_SPARC_TLS_LDM_HI22 :   // Local-dynamic
          case elfcpp::R_SPARC_TLS_LDM_LO10:
          case elfcpp::R_SPARC_TLS_LDM_ADD:
          case elfcpp::R_SPARC_TLS_LDM_CALL:
            if (optimized_type == tls::TLSOPT_NONE)
              {
                // Create a GOT entry for the module index.
                target->got_mod_index_entry(symtab, layout, object);
 
                if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
                  generate_tls_call(symtab, layout, target);
              }
            else if (optimized_type != tls::TLSOPT_TO_LE)
              unsupported_reloc_local(object, r_type);
            break;
 
          case elfcpp::R_SPARC_TLS_LDO_HIX22:   // Alternate local-dynamic
          case elfcpp::R_SPARC_TLS_LDO_LOX10:
          case elfcpp::R_SPARC_TLS_LDO_ADD:
            break;
 
          case elfcpp::R_SPARC_TLS_IE_HI22:     // Initial-exec
          case elfcpp::R_SPARC_TLS_IE_LO10:
          case elfcpp::R_SPARC_TLS_IE_LD:
          case elfcpp::R_SPARC_TLS_IE_LDX:
          case elfcpp::R_SPARC_TLS_IE_ADD:
            layout->set_has_static_tls();
            if (optimized_type == tls::TLSOPT_NONE)
              {
                // Create a GOT entry for the tp-relative offset.
                Output_data_got<size, big_endian>* got
                  = target->got_section(symtab, layout);
                unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
 
                if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET))
                  {
                    Reloc_section* rela_dyn = target->rela_dyn_section(layout);
                    unsigned int off = got->add_constant(0);
 
                    object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET,
                                                 off);
                    rela_dyn->add_local_relative(object, r_sym,
                                                 (size == 64 ?
                                                  elfcpp::R_SPARC_TLS_TPOFF64 :
                                                  elfcpp::R_SPARC_TLS_TPOFF32),
                                                 got, off, 0);
                  }
              }
            else if (optimized_type != tls::TLSOPT_TO_LE)
              unsupported_reloc_local(object, r_type);
            break;
 
          case elfcpp::R_SPARC_TLS_LE_HIX22:    // Local-exec
          case elfcpp::R_SPARC_TLS_LE_LOX10:
            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<size>(reloc.get_r_info());
                Reloc_section* rela_dyn = target->rela_dyn_section(layout);
                rela_dyn->add_local_relative(object, r_sym, r_type,
                                             output_section, data_shndx,
                                             reloc.get_r_offset(), 0);
              }
            break;
          }
      }
      break;
 
      // These are relocations which should only be seen by the
      // dynamic linker, and should never be seen here.
    case elfcpp::R_SPARC_COPY:
    case elfcpp::R_SPARC_GLOB_DAT:
    case elfcpp::R_SPARC_JMP_SLOT:
    case elfcpp::R_SPARC_RELATIVE:
    case elfcpp::R_SPARC_TLS_DTPMOD64:
    case elfcpp::R_SPARC_TLS_DTPMOD32:
    case elfcpp::R_SPARC_TLS_DTPOFF64:
    case elfcpp::R_SPARC_TLS_DTPOFF32:
    case elfcpp::R_SPARC_TLS_TPOFF64:
    case elfcpp::R_SPARC_TLS_TPOFF32:
      gold_error(_("%s: unexpected reloc %u in object file"),
                 object->name().c_str(), r_type);
      break;
 
    default:
      unsupported_reloc_local(object, r_type);
      break;
    }
}
 
// Report an unsupported relocation against a global symbol.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::Scan::unsupported_reloc_global(
                        Sized_relobj<size, big_endian>* 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());
}
 
// Scan a relocation for a global symbol.
 
template<int size, bool big_endian>
inline void
Target_sparc<size, big_endian>::Scan::global(
                                const General_options&,
                                Symbol_table* symtab,
                                Layout* layout,
                                Target_sparc<size, big_endian>* target,
                                Sized_relobj<size, big_endian>* object,
                                unsigned int data_shndx,
                                Output_section* output_section,
                                const elfcpp::Rela<size, big_endian>& reloc,
                                unsigned int r_type,
                                Symbol* gsym)
{
  unsigned int orig_r_type = r_type;
 
  // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
  // section.  We check here to avoid creating a dynamic reloc against
  // _GLOBAL_OFFSET_TABLE_.
  if (!target->has_got_section()
      && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
    target->got_section(symtab, layout);
 
  r_type &= 0xff;
  switch (r_type)
    {
    case elfcpp::R_SPARC_NONE:
    case elfcpp::R_SPARC_REGISTER:
    case elfcpp::R_SPARC_GNU_VTINHERIT:
    case elfcpp::R_SPARC_GNU_VTENTRY:
      break;
 
    case elfcpp::R_SPARC_PLT64:
    case elfcpp::R_SPARC_PLT32:
    case elfcpp::R_SPARC_HIPLT22:
    case elfcpp::R_SPARC_LOPLT10:
    case elfcpp::R_SPARC_PCPLT32:
    case elfcpp::R_SPARC_PCPLT22:
    case elfcpp::R_SPARC_PCPLT10:
    case elfcpp::R_SPARC_WPLT30:
      // 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_SPARC_DISP8:
    case elfcpp::R_SPARC_DISP16:
    case elfcpp::R_SPARC_DISP32:
    case elfcpp::R_SPARC_DISP64:
    case elfcpp::R_SPARC_PC_HH22:
    case elfcpp::R_SPARC_PC_HM10:
    case elfcpp::R_SPARC_PC_LM22:
    case elfcpp::R_SPARC_PC10:
    case elfcpp::R_SPARC_PC22:
    case elfcpp::R_SPARC_WDISP30:
    case elfcpp::R_SPARC_WDISP22:
    case elfcpp::R_SPARC_WDISP19:
    case elfcpp::R_SPARC_WDISP16:
      {
        if (gsym->needs_plt_entry())
          target->make_plt_entry(symtab, layout, gsym);
        // Make a dynamic relocation if necessary.
        int flags = Symbol::NON_PIC_REF;
        if (gsym->type() == elfcpp::STT_FUNC)
          flags |= Symbol::FUNCTION_CALL;
        if (gsym->needs_dynamic_reloc(flags))
          {
            if (gsym->may_need_copy_reloc())
              {
                target->copy_reloc(symtab, layout, object,
                                   data_shndx, output_section, gsym,
                                   reloc);
              }
            else
              {
                Reloc_section* rela_dyn = target->rela_dyn_section(layout);
                check_non_pic(object, r_type);
                rela_dyn->add_global(gsym, orig_r_type, output_section, object,
                                     data_shndx, reloc.get_r_offset(),
                                     reloc.get_r_addend());
              }
          }
      }
      break;
 
    case elfcpp::R_SPARC_UA64:
    case elfcpp::R_SPARC_64:
    case elfcpp::R_SPARC_HIX22:
    case elfcpp::R_SPARC_LOX10:
    case elfcpp::R_SPARC_H44:
    case elfcpp::R_SPARC_M44:
    case elfcpp::R_SPARC_L44:
    case elfcpp::R_SPARC_HH22:
    case elfcpp::R_SPARC_HM10:
    case elfcpp::R_SPARC_LM22:
    case elfcpp::R_SPARC_HI22:
    case elfcpp::R_SPARC_LO10:
    case elfcpp::R_SPARC_OLO10:
    case elfcpp::R_SPARC_UA32:
    case elfcpp::R_SPARC_32:
    case elfcpp::R_SPARC_UA16:
    case elfcpp::R_SPARC_16:
    case elfcpp::R_SPARC_11:
    case elfcpp::R_SPARC_10:
    case elfcpp::R_SPARC_8:
    case elfcpp::R_SPARC_7:
    case elfcpp::R_SPARC_6:
    case elfcpp::R_SPARC_5:
      {
        // 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(Symbol::ABSOLUTE_REF))
          {
            if (gsym->may_need_copy_reloc())
              {
                target->copy_reloc(symtab, layout, object,
                                   data_shndx, output_section, gsym, reloc);
              }
            else if ((r_type == elfcpp::R_SPARC_32
                      || r_type == elfcpp::R_SPARC_64)
                     && gsym->can_use_relative_reloc(false))
              {
                Reloc_section* rela_dyn = target->rela_dyn_section(layout);
                rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
                                              output_section, object,
                                              data_shndx, reloc.get_r_offset(),
                                              reloc.get_r_addend());
              }
            else
              {
                Reloc_section* rela_dyn = target->rela_dyn_section(layout);
 
                check_non_pic(object, r_type);
                if (gsym->is_from_dynobj()
                    || gsym->is_undefined()
                    || gsym->is_preemptible())
                  rela_dyn->add_global(gsym, orig_r_type, output_section,
                                       object, data_shndx,
                                       reloc.get_r_offset(),
                                       reloc.get_r_addend());
                else
                  rela_dyn->add_global_relative(gsym, orig_r_type,
                                                output_section, object,
                                                data_shndx,
                                                reloc.get_r_offset(),
                                                reloc.get_r_addend());
              }
          }
      }
      break;
 
    case elfcpp::R_SPARC_GOT10:
    case elfcpp::R_SPARC_GOT13:
    case elfcpp::R_SPARC_GOT22:
      {
        // The symbol requires a GOT entry.
        Output_data_got<size, big_endian>* got;
 
        got = target->got_section(symtab, layout);
        if (gsym->final_value_is_known())
          got->add_global(gsym, GOT_TYPE_STANDARD);
        else
          {
            // If this symbol is not fully resolved, we need to add a
            // dynamic relocation for it.
            Reloc_section* rela_dyn = target->rela_dyn_section(layout);
            if (gsym->is_from_dynobj()
                || gsym->is_undefined()
                || gsym->is_preemptible())
              got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
                                        elfcpp::R_SPARC_GLOB_DAT);
            else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
              {
                unsigned int off = got->add_constant(0);
 
                gsym->set_got_offset(GOT_TYPE_STANDARD, off);
                rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
                                              got, off, 0);
              }
          }
      }
      break;
 
      // These are initial tls relocs, which are expected when
      // linking.
    case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
    case elfcpp::R_SPARC_TLS_GD_LO10:
    case elfcpp::R_SPARC_TLS_GD_ADD:
    case elfcpp::R_SPARC_TLS_GD_CALL:
    case elfcpp::R_SPARC_TLS_LDM_HI22:  // Local-dynamic
    case elfcpp::R_SPARC_TLS_LDM_LO10:
    case elfcpp::R_SPARC_TLS_LDM_ADD:
    case elfcpp::R_SPARC_TLS_LDM_CALL:
    case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
    case elfcpp::R_SPARC_TLS_LDO_LOX10:
    case elfcpp::R_SPARC_TLS_LDO_ADD:
    case elfcpp::R_SPARC_TLS_LE_HIX22:
    case elfcpp::R_SPARC_TLS_LE_LOX10:
    case elfcpp::R_SPARC_TLS_IE_HI22:   // Initial-exec
    case elfcpp::R_SPARC_TLS_IE_LO10:
    case elfcpp::R_SPARC_TLS_IE_LD:
    case elfcpp::R_SPARC_TLS_IE_LDX:
    case elfcpp::R_SPARC_TLS_IE_ADD:
      {
        const bool is_final = gsym->final_value_is_known();
        const tls::Tls_optimization optimized_type
            = optimize_tls_reloc(is_final, r_type);
        switch (r_type)
          {
          case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
          case elfcpp::R_SPARC_TLS_GD_LO10:
          case elfcpp::R_SPARC_TLS_GD_ADD:
          case elfcpp::R_SPARC_TLS_GD_CALL:
            if (optimized_type == tls::TLSOPT_NONE)
              {
                // Create a pair of GOT entries for the module index and
                // dtv-relative offset.
                Output_data_got<size, big_endian>* got
                    = target->got_section(symtab, layout);
                got->add_global_pair_with_rela(gsym, GOT_TYPE_TLS_PAIR,
                                               target->rela_dyn_section(layout),
                                               (size == 64 ?
                                                elfcpp::R_SPARC_TLS_DTPMOD64 :
                                                elfcpp::R_SPARC_TLS_DTPMOD32),
                                               (size == 64 ?
                                                elfcpp::R_SPARC_TLS_DTPOFF64 :
                                                elfcpp::R_SPARC_TLS_DTPOFF32));
 
                // Emit R_SPARC_WPLT30 against "__tls_get_addr"
                if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
                  generate_tls_call(symtab, layout, target);
              }
            else if (optimized_type == tls::TLSOPT_TO_IE)
              {
                // Create a GOT entry for the tp-relative offset.
                Output_data_got<size, big_endian>* got
                    = target->got_section(symtab, layout);
                got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
                                          target->rela_dyn_section(layout),
                                          (size == 64 ?
                                           elfcpp::R_SPARC_TLS_TPOFF64 :
                                           elfcpp::R_SPARC_TLS_TPOFF32));
              }
            else if (optimized_type != tls::TLSOPT_TO_LE)
              unsupported_reloc_global(object, r_type, gsym);
            break;
 
          case elfcpp::R_SPARC_TLS_LDM_HI22:    // Local-dynamic
          case elfcpp::R_SPARC_TLS_LDM_LO10:
          case elfcpp::R_SPARC_TLS_LDM_ADD:
          case elfcpp::R_SPARC_TLS_LDM_CALL:
            if (optimized_type == tls::TLSOPT_NONE)
              {
                // Create a GOT entry for the module index.
                target->got_mod_index_entry(symtab, layout, object);
 
                if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
                  generate_tls_call(symtab, layout, target);
              }
            else if (optimized_type != tls::TLSOPT_TO_LE)
              unsupported_reloc_global(object, r_type, gsym);
            break;
 
          case elfcpp::R_SPARC_TLS_LDO_HIX22:   // Alternate local-dynamic
          case elfcpp::R_SPARC_TLS_LDO_LOX10:
          case elfcpp::R_SPARC_TLS_LDO_ADD:
            break;
 
          case elfcpp::R_SPARC_TLS_LE_HIX22:
          case elfcpp::R_SPARC_TLS_LE_LOX10:
            layout->set_has_static_tls();
            if (parameters->options().shared())
              {
                Reloc_section* rela_dyn = target->rela_dyn_section(layout);
                rela_dyn->add_global_relative(gsym, orig_r_type,
                                              output_section, object,
                                              data_shndx, reloc.get_r_offset(),
                                              0);
              }
            break;
 
          case elfcpp::R_SPARC_TLS_IE_HI22:     // Initial-exec
          case elfcpp::R_SPARC_TLS_IE_LO10:
          case elfcpp::R_SPARC_TLS_IE_LD:
          case elfcpp::R_SPARC_TLS_IE_LDX:
          case elfcpp::R_SPARC_TLS_IE_ADD:
            layout->set_has_static_tls();
            if (optimized_type == tls::TLSOPT_NONE)
              {
                // Create a GOT entry for the tp-relative offset.
                Output_data_got<size, big_endian>* got
                  = target->got_section(symtab, layout);
                got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
                                          target->rela_dyn_section(layout),
                                          (size == 64 ?
                                           elfcpp::R_SPARC_TLS_TPOFF64 :
                                           elfcpp::R_SPARC_TLS_TPOFF32));
              }
            else if (optimized_type != tls::TLSOPT_TO_LE)
              unsupported_reloc_global(object, r_type, gsym);
            break;
          }
      }
      break;
 
      // These are relocations which should only be seen by the
      // dynamic linker, and should never be seen here.
    case elfcpp::R_SPARC_COPY:
    case elfcpp::R_SPARC_GLOB_DAT:
    case elfcpp::R_SPARC_JMP_SLOT:
    case elfcpp::R_SPARC_RELATIVE:
    case elfcpp::R_SPARC_TLS_DTPMOD64:
    case elfcpp::R_SPARC_TLS_DTPMOD32:
    case elfcpp::R_SPARC_TLS_DTPOFF64:
    case elfcpp::R_SPARC_TLS_DTPOFF32:
    case elfcpp::R_SPARC_TLS_TPOFF64:
    case elfcpp::R_SPARC_TLS_TPOFF32:
      gold_error(_("%s: unexpected reloc %u in object file"),
                 object->name().c_str(), r_type);
      break;
 
    default:
      unsupported_reloc_global(object, r_type, gsym);
      break;
    }
}
 
// Process relocations for gc.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::gc_process_relocs(
                        const General_options& options,
                        Symbol_table* symtab,
                        Layout* layout,
                        Sized_relobj<size, big_endian>* 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)
{
  typedef Target_sparc<size, big_endian> Sparc;
  typedef typename Target_sparc<size, big_endian>::Scan Scan;
 
  gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
    options,
    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.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::scan_relocs(
                        const General_options& options,
                        Symbol_table* symtab,
                        Layout* layout,
                        Sized_relobj<size, big_endian>* 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)
{
  typedef Target_sparc<size, big_endian> Sparc;
  typedef typename Target_sparc<size, big_endian>::Scan Scan;
 
  if (sh_type == elfcpp::SHT_REL)
    {
      gold_error(_("%s: unsupported REL reloc section"),
                 object->name().c_str());
      return;
    }
 
  gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
    options,
    symtab,
    layout,
    this,
    object,
    data_shndx,
    prelocs,
    reloc_count,
    output_section,
    needs_special_offset_handling,
    local_symbol_count,
    plocal_symbols);
}
 
// Finalize the sections.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::do_finalize_sections(Layout* layout)
{
  // Fill in some more dynamic tags.
  Output_data_dynamic* const odyn = layout->dynamic_data();
  if (odyn != NULL)
    {
      if (this->plt_ != NULL
          && this->plt_->output_section() != NULL)
        {
          const Output_data* od = this->plt_->rel_plt();
          odyn->add_section_size(elfcpp::DT_PLTRELSZ, od);
          odyn->add_section_address(elfcpp::DT_JMPREL, od);
          odyn->add_constant(elfcpp::DT_PLTREL, elfcpp::DT_RELA);
 
          odyn->add_section_address(elfcpp::DT_PLTGOT, this->plt_);
        }
 
      if (this->rela_dyn_ != NULL
          && this->rela_dyn_->output_section() != NULL)
        {
          const Output_data* od = this->rela_dyn_;
          odyn->add_section_address(elfcpp::DT_RELA, od);
          odyn->add_section_size(elfcpp::DT_RELASZ, od);
          odyn->add_constant(elfcpp::DT_RELAENT,
                             elfcpp::Elf_sizes<size>::rela_size);
        }
 
      if (!parameters->options().shared())
        {
          // The value of the DT_DEBUG tag is filled in by the dynamic
          // linker at run time, and used by the debugger.
          odyn->add_constant(elfcpp::DT_DEBUG, 0);
        }
    }
 
  // 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->rela_dyn_section(layout));
}
 
// Perform a relocation.
 
template<int size, bool big_endian>
inline bool
Target_sparc<size, big_endian>::Relocate::relocate(
                        const Relocate_info<size, big_endian>* relinfo,
                        Target_sparc* target,
                        Output_section*,
                        size_t relnum,
                        const elfcpp::Rela<size, big_endian>& rela,
                        unsigned int r_type,
                        const Sized_symbol<size>* gsym,
                        const Symbol_value<size>* psymval,
                        unsigned char* view,
                        typename elfcpp::Elf_types<size>::Elf_Addr address,
                        section_size_type view_size)
{
  r_type &= 0xff;
 
  if (this->ignore_gd_add_)
    {
      if (r_type != elfcpp::R_SPARC_TLS_GD_ADD)
        gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
                               _("missing expected TLS relocation"));
      else
        {
          this->ignore_gd_add_ = false;
          return false;
        }
    }
 
  typedef Sparc_relocate_functions<size, big_endian> Reloc;
 
  // Pick the value to use for symbols defined in shared objects.
  Symbol_value<size> symval;
  if (gsym != NULL
      && gsym->use_plt_offset(r_type == elfcpp::R_SPARC_DISP8
                              || r_type == elfcpp::R_SPARC_DISP16
                              || r_type == elfcpp::R_SPARC_DISP32
                              || r_type == elfcpp::R_SPARC_DISP64
                              || r_type == elfcpp::R_SPARC_PC_HH22
                              || r_type == elfcpp::R_SPARC_PC_HM10
                              || r_type == elfcpp::R_SPARC_PC_LM22
                              || r_type == elfcpp::R_SPARC_PC10
                              || r_type == elfcpp::R_SPARC_PC22
                              || r_type == elfcpp::R_SPARC_WDISP30
                              || r_type == elfcpp::R_SPARC_WDISP22
                              || r_type == elfcpp::R_SPARC_WDISP19
                              || r_type == elfcpp::R_SPARC_WDISP16))
    {
      elfcpp::Elf_Xword value;
 
      value = target->plt_section()->address() + gsym->plt_offset();
 
      symval.set_output_value(value);
 
      psymval = &symval;
    }
 
  const Sized_relobj<size, big_endian>* object = relinfo->object;
  const elfcpp::Elf_Xword addend = rela.get_r_addend();
 
  // Get the GOT offset if needed.  Unlike i386 and x86_64, our GOT
  // pointer points to the beginning, not the end, of the table.
  // So we just use the plain offset.
  bool have_got_offset = false;
  unsigned int got_offset = 0;
  switch (r_type)
    {
    case elfcpp::R_SPARC_GOT10:
    case elfcpp::R_SPARC_GOT13:
    case elfcpp::R_SPARC_GOT22:
      if (gsym != NULL)
        {
          gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
          got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
        }
      else
        {
          unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.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);
        }
      have_got_offset = true;
      break;
 
    default:
      break;
    }
 
  switch (r_type)
    {
    case elfcpp::R_SPARC_NONE:
    case elfcpp::R_SPARC_REGISTER:
    case elfcpp::R_SPARC_GNU_VTINHERIT:
    case elfcpp::R_SPARC_GNU_VTENTRY:
      break;
 
    case elfcpp::R_SPARC_8:
      Relocate_functions<size, big_endian>::rela8(view, object,
                                                  psymval, addend);
      break;
 
    case elfcpp::R_SPARC_16:
      Relocate_functions<size, big_endian>::rela16(view, object,
                                                   psymval, addend);
      break;
 
    case elfcpp::R_SPARC_32:
      if (!parameters->options().output_is_position_independent())
        Relocate_functions<size, big_endian>::rela32(view, object,
                                                     psymval, addend);
      break;
 
    case elfcpp::R_SPARC_DISP8:
      Reloc::disp8(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_DISP16:
      Reloc::disp16(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_DISP32:
      Reloc::disp32(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_DISP64:
      Reloc::disp64(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_WDISP30:
    case elfcpp::R_SPARC_WPLT30:
      Reloc::wdisp30(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_WDISP22:
      Reloc::wdisp22(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_WDISP19:
      Reloc::wdisp19(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_WDISP16:
      Reloc::wdisp16(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_HI22:
      Reloc::hi22(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_22:
      Reloc::rela32_22(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_13:
      Reloc::rela32_13(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_LO10:
      Reloc::lo10(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_GOT10:
      Reloc::lo10(view, got_offset, addend);
      break;
 
    case elfcpp::R_SPARC_GOT13:
      Reloc::rela32_13(view, got_offset, addend);
      break;
 
    case elfcpp::R_SPARC_GOT22:
      Reloc::hi22(view, got_offset, addend);
      break;
 
    case elfcpp::R_SPARC_PC10:
      Reloc::pc10(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_PC22:
      Reloc::pc22(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_TLS_DTPOFF32:
    case elfcpp::R_SPARC_UA32:
      Reloc::ua32(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_PLT64:
      Relocate_functions<size, big_endian>::rela64(view, object,
                                                   psymval, addend);
      break;
 
    case elfcpp::R_SPARC_PLT32:
      Relocate_functions<size, big_endian>::rela32(view, object,
                                                   psymval, addend);
      break;
 
    case elfcpp::R_SPARC_HIPLT22:
      Reloc::hi22(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_LOPLT10:
      Reloc::lo10(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_PCPLT32:
      Reloc::disp32(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_PCPLT22:
      Reloc::pcplt22(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_PCPLT10:
      Reloc::lo10(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_64:
      if (!parameters->options().output_is_position_independent())
              Relocate_functions<size, big_endian>::rela64(view, object,
                                                           psymval, addend);
      break;
 
    case elfcpp::R_SPARC_OLO10:
      {
        unsigned int addend2 = rela.get_r_info() & 0xffffffff;
        addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000;
        Reloc::olo10(view, object, psymval, addend, addend2);
      }
      break;
 
    case elfcpp::R_SPARC_HH22:
      Reloc::hh22(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_PC_HH22:
      Reloc::pc_hh22(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_HM10:
      Reloc::hm10(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_PC_HM10:
      Reloc::pc_hm10(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_LM22:
      Reloc::hi22(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_PC_LM22:
      Reloc::pcplt22(view, object, psymval, addend, address);
      break;
 
    case elfcpp::R_SPARC_11:
      Reloc::rela32_11(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_10:
      Reloc::rela32_10(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_7:
      Reloc::rela32_7(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_6:
      Reloc::rela32_6(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_5:
      Reloc::rela32_5(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_HIX22:
      Reloc::hix22(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_LOX10:
      Reloc::lox10(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_H44:
      Reloc::h44(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_M44:
      Reloc::m44(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_L44:
      Reloc::l44(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_TLS_DTPOFF64:
    case elfcpp::R_SPARC_UA64:
      Reloc::ua64(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_UA16:
      Reloc::ua16(view, object, psymval, addend);
      break;
 
    case elfcpp::R_SPARC_TLS_GD_HI22:
    case elfcpp::R_SPARC_TLS_GD_LO10:
    case elfcpp::R_SPARC_TLS_GD_ADD:
    case elfcpp::R_SPARC_TLS_GD_CALL:
    case elfcpp::R_SPARC_TLS_LDM_HI22:
    case elfcpp::R_SPARC_TLS_LDM_LO10:
    case elfcpp::R_SPARC_TLS_LDM_ADD:
    case elfcpp::R_SPARC_TLS_LDM_CALL:
    case elfcpp::R_SPARC_TLS_LDO_HIX22:
    case elfcpp::R_SPARC_TLS_LDO_LOX10:
    case elfcpp::R_SPARC_TLS_LDO_ADD:
    case elfcpp::R_SPARC_TLS_IE_HI22:
    case elfcpp::R_SPARC_TLS_IE_LO10:
    case elfcpp::R_SPARC_TLS_IE_LD:
    case elfcpp::R_SPARC_TLS_IE_LDX:
    case elfcpp::R_SPARC_TLS_IE_ADD:
    case elfcpp::R_SPARC_TLS_LE_HIX22:
    case elfcpp::R_SPARC_TLS_LE_LOX10:
      this->relocate_tls(relinfo, target, relnum, rela,
                         r_type, gsym, psymval, view,
                         address, view_size);
      break;
 
    case elfcpp::R_SPARC_COPY:
    case elfcpp::R_SPARC_GLOB_DAT:
    case elfcpp::R_SPARC_JMP_SLOT:
    case elfcpp::R_SPARC_RELATIVE:
      // These are outstanding tls relocs, which are unexpected when
      // linking.
    case elfcpp::R_SPARC_TLS_DTPMOD64:
    case elfcpp::R_SPARC_TLS_DTPMOD32:
    case elfcpp::R_SPARC_TLS_TPOFF64:
    case elfcpp::R_SPARC_TLS_TPOFF32:
      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
                             _("unexpected reloc %u in object file"),
                             r_type);
      break;
 
    default:
      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
                             _("unsupported reloc %u"),
                             r_type);
      break;
    }
 
  return true;
}
 
// Perform a TLS relocation.
 
template<int size, bool big_endian>
inline void
Target_sparc<size, big_endian>::Relocate::relocate_tls(
                        const Relocate_info<size, big_endian>* relinfo,
                        Target_sparc<size, big_endian>* target,
                        size_t relnum,
                        const elfcpp::Rela<size, big_endian>& rela,
                        unsigned int r_type,
                        const Sized_symbol<size>* gsym,
                        const Symbol_value<size>* psymval,
                        unsigned char* view,
                        typename elfcpp::Elf_types<size>::Elf_Addr address,
                        section_size_type)
{
  Output_segment* tls_segment = relinfo->layout->tls_segment();
  typedef Sparc_relocate_functions<size, big_endian> Reloc;
  const Sized_relobj<size, big_endian>* object = relinfo->object;
  typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
 
  const elfcpp::Elf_Xword addend = rela.get_r_addend();
  typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
 
  const bool is_final =
    (gsym == NULL
     ? !parameters->options().output_is_position_independent()
     : gsym->final_value_is_known());
  const tls::Tls_optimization optimized_type
      = optimize_tls_reloc(is_final, r_type);
 
  switch (r_type)
    {
    case elfcpp::R_SPARC_TLS_GD_HI22:
    case elfcpp::R_SPARC_TLS_GD_LO10:
    case elfcpp::R_SPARC_TLS_GD_ADD:
    case elfcpp::R_SPARC_TLS_GD_CALL:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          Insntype* wv = reinterpret_cast<Insntype*>(view);
          Insntype val;
 
          value -= tls_segment->memsz();
 
          switch (r_type)
            {
            case elfcpp::R_SPARC_TLS_GD_HI22:
              // TLS_GD_HI22 --> TLS_LE_HIX22
              Reloc::hix22(view, value, addend);
              break;
 
            case elfcpp::R_SPARC_TLS_GD_LO10:
              // TLS_GD_LO10 --> TLS_LE_LOX10
              Reloc::lox10(view, value, addend);
              break;
 
            case elfcpp::R_SPARC_TLS_GD_ADD:
              // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3
              val = elfcpp::Swap<32, true>::readval(wv);
              val = (val & ~0x7c000) | 0x1c000;
              elfcpp::Swap<32, true>::writeval(wv, val);
              break;
            case elfcpp::R_SPARC_TLS_GD_CALL:
              // call __tls_get_addr --> nop
              elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
              break;
            }
          break;
        }
      else
        {
          unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
                                   ? GOT_TYPE_TLS_OFFSET
                                   : GOT_TYPE_TLS_PAIR);
          if (gsym != NULL)
            {
              gold_assert(gsym->has_got_offset(got_type));
              value = gsym->got_offset(got_type);
            }
          else
            {
              unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
              gold_assert(object->local_has_got_offset(r_sym, got_type));
              value = object->local_got_offset(r_sym, got_type);
            }
          if (optimized_type == tls::TLSOPT_TO_IE)
            {
              Insntype* wv = reinterpret_cast<Insntype*>(view);
              Insntype val;
 
              switch (r_type)
                {
                case elfcpp::R_SPARC_TLS_GD_HI22:
                  // TLS_GD_HI22 --> TLS_IE_HI22
                  Reloc::hi22(view, value, addend);
                  break;
 
                case elfcpp::R_SPARC_TLS_GD_LO10:
                  // TLS_GD_LO10 --> TLS_IE_LO10
                  Reloc::lo10(view, value, addend);
                  break;
 
                case elfcpp::R_SPARC_TLS_GD_ADD:
                  // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3
                  val = elfcpp::Swap<32, true>::readval(wv);
 
                  if (size == 64)
                    val |= 0xc0580000;
                  else
                    val |= 0xc0000000;
 
                  elfcpp::Swap<32, true>::writeval(wv, val);
                  break;
 
                case elfcpp::R_SPARC_TLS_GD_CALL:
                  // The compiler can put the TLS_GD_ADD instruction
                  // into the delay slot of the call.  If so, we need
                  // to transpose the two instructions so that the
                  // the new sequence works properly.
                  //
                  // The test we use is if the instruction in the
                  // delay slot is an add with destination register
                  // equal to %o0
                  val = elfcpp::Swap<32, true>::readval(wv + 1);
                  if ((val & 0x81f80000) == 0x80000000
                      && ((val >> 25) & 0x1f) == 0x8)
                    {
                      if (size == 64)
                        val |= 0xc0580000;
                      else
                        val |= 0xc0000000;
 
                      elfcpp::Swap<32, true>::writeval(wv, val);
 
                      wv += 1;
                      this->ignore_gd_add_ = true;
                    }
 
                  // call __tls_get_addr --> add %g7, %o0, %o0
                  elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
                  break;
                }
              break;
            }
          else if (optimized_type == tls::TLSOPT_NONE)
            {
              switch (r_type)
                {
                case elfcpp::R_SPARC_TLS_GD_HI22:
                  Reloc::hi22(view, value, addend);
                  break;
                case elfcpp::R_SPARC_TLS_GD_LO10:
                  Reloc::lo10(view, value, addend);
                  break;
                case elfcpp::R_SPARC_TLS_GD_ADD:
                  break;
                case elfcpp::R_SPARC_TLS_GD_CALL:
                  {
                    Symbol_value<size> symval;
                    elfcpp::Elf_Xword value;
                    Symbol* tsym;
 
                    tsym = target->tls_get_addr_sym_;
                    gold_assert(tsym);
                    value = (target->plt_section()->address() +
                             tsym->plt_offset());
                    symval.set_output_value(value);
                    Reloc::wdisp30(view, object, &symval, addend, address);
                  }
                  break;
                }
              break;
            }
        }
      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
                             _("unsupported reloc %u"),
                             r_type);
      break;
 
    case elfcpp::R_SPARC_TLS_LDM_HI22:
    case elfcpp::R_SPARC_TLS_LDM_LO10:
    case elfcpp::R_SPARC_TLS_LDM_ADD:
    case elfcpp::R_SPARC_TLS_LDM_CALL:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          Insntype* wv = reinterpret_cast<Insntype*>(view);
 
          switch (r_type)
            {
            case elfcpp::R_SPARC_TLS_LDM_HI22:
            case elfcpp::R_SPARC_TLS_LDM_LO10:
            case elfcpp::R_SPARC_TLS_LDM_ADD:
              elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
              break;
 
            case elfcpp::R_SPARC_TLS_LDM_CALL:
              elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0);
              break;
            }
          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);
          switch (r_type)
            {
            case elfcpp::R_SPARC_TLS_LDM_HI22:
              Reloc::hi22(view, got_offset, addend);
              break;
            case elfcpp::R_SPARC_TLS_LDM_LO10:
              Reloc::lo10(view, got_offset, addend);
              break;
            case elfcpp::R_SPARC_TLS_LDM_ADD:
              break;
            case elfcpp::R_SPARC_TLS_LDM_CALL:
              {
                Symbol_value<size> symval;
                elfcpp::Elf_Xword value;
                Symbol* tsym;
 
                tsym = target->tls_get_addr_sym_;
                gold_assert(tsym);
                value = (target->plt_section()->address() +
                         tsym->plt_offset());
                symval.set_output_value(value);
                Reloc::wdisp30(view, object, &symval, addend, address);
              }
              break;
            }
          break;
        }
      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
                             _("unsupported reloc %u"),
                             r_type);
      break;
 
      // These relocs can appear in debugging sections, in which case
      // we won't see the TLS_LDM relocs.  The local_dynamic_type
      // field tells us this.
    case elfcpp::R_SPARC_TLS_LDO_HIX22:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          value -= tls_segment->memsz();
          Reloc::hix22(view, value, addend);
        }
      else
        Reloc::ldo_hix22(view, value, addend);
      break;
    case elfcpp::R_SPARC_TLS_LDO_LOX10:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          value -= tls_segment->memsz();
          Reloc::lox10(view, value, addend);
        }
      else
        Reloc::ldo_lox10(view, value, addend);
      break;
    case elfcpp::R_SPARC_TLS_LDO_ADD:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          Insntype* wv = reinterpret_cast<Insntype*>(view);
          Insntype val;
 
          // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3
          val = elfcpp::Swap<32, true>::readval(wv);
          val = (val & ~0x7c000) | 0x1c000;
          elfcpp::Swap<32, true>::writeval(wv, val);
        }
      break;
 
      // When optimizing IE --> LE, the only relocation that is handled
      // differently is R_SPARC_TLS_IE_LD, it is rewritten from
      // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is
      // rs2 and rd are the same.
    case elfcpp::R_SPARC_TLS_IE_LD:
    case elfcpp::R_SPARC_TLS_IE_LDX:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          Insntype* wv = reinterpret_cast<Insntype*>(view);
          Insntype val = elfcpp::Swap<32, true>::readval(wv);
          Insntype rs2 = val & 0x1f;
          Insntype rd = (val >> 25) & 0x1f;
 
          if (rs2 == rd)
            val = sparc_nop;
          else
            val = sparc_mov | (val & 0x3e00001f);
 
          elfcpp::Swap<32, true>::writeval(wv, val);
        }
      break;
 
    case elfcpp::R_SPARC_TLS_IE_HI22:
    case elfcpp::R_SPARC_TLS_IE_LO10:
      if (optimized_type == tls::TLSOPT_TO_LE)
        {
          value -= tls_segment->memsz();
          switch (r_type)
            {
            case elfcpp::R_SPARC_TLS_IE_HI22:
              // IE_HI22 --> LE_HIX22
              Reloc::hix22(view, value, addend);
              break;
            case elfcpp::R_SPARC_TLS_IE_LO10:
              // IE_LO10 --> LE_LOX10
              Reloc::lox10(view, value, addend);
              break;
            }
          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.
          if (gsym != NULL)
            {
              gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
              value = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
            }
          else
            {
              unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
              gold_assert(object->local_has_got_offset(r_sym,
                                                       GOT_TYPE_TLS_OFFSET));
              value = object->local_got_offset(r_sym,
                                               GOT_TYPE_TLS_OFFSET);
            }
          switch (r_type)
            {
            case elfcpp::R_SPARC_TLS_IE_HI22:
              Reloc::hi22(view, value, addend);
              break;
            case elfcpp::R_SPARC_TLS_IE_LO10:
              Reloc::lo10(view, value, addend);
              break;
            }
          break;
        }
      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
                             _("unsupported reloc %u"),
                             r_type);
      break;
 
    case elfcpp::R_SPARC_TLS_IE_ADD:
      // This seems to be mainly so that we can find the addition
      // instruction if there is one.  There doesn't seem to be any
      // actual relocation to apply.
      break;
 
    case elfcpp::R_SPARC_TLS_LE_HIX22:
      // 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())
        {
          value -= tls_segment->memsz();
          Reloc::hix22(view, value, addend);
        }
      break;
 
    case elfcpp::R_SPARC_TLS_LE_LOX10:
      // 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())
        {
          value -= tls_segment->memsz();
          Reloc::lox10(view, value, addend);
        }
      break;
    }
}
 
// Relocate section data.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::relocate_section(
                        const Relocate_info<size, big_endian>* 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,
                        typename elfcpp::Elf_types<size>::Elf_Addr address,
                        section_size_type view_size,
                        const Reloc_symbol_changes* reloc_symbol_changes)
{
  typedef Target_sparc<size, big_endian> Sparc;
  typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
 
  gold_assert(sh_type == elfcpp::SHT_RELA);
 
  gold::relocate_section<size, big_endian, Sparc, elfcpp::SHT_RELA,
    Sparc_relocate>(
    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.
 
template<int size, bool big_endian>
unsigned int
Target_sparc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
    unsigned int,
    Relobj*)
{
  // We are always SHT_RELA, so we should never get here.
  gold_unreachable();
  return 0;
}
 
// Scan the relocs during a relocatable link.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::scan_relocatable_relocs(
                        const General_options& options,
                        Symbol_table* symtab,
                        Layout* layout,
                        Sized_relobj<size, big_endian>* 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_RELA);
 
  typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
    Relocatable_size_for_reloc> Scan_relocatable_relocs;
 
  gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
      Scan_relocatable_relocs>(
    options,
    symtab,
    layout,
    object,
    data_shndx,
    prelocs,
    reloc_count,
    output_section,
    needs_special_offset_handling,
    local_symbol_count,
    plocal_symbols,
    rr);
}
 
// Relocate a section during a relocatable link.
 
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::relocate_for_relocatable(
    const Relocate_info<size, big_endian>* relinfo,
    unsigned int sh_type,
    const unsigned char* prelocs,
    size_t reloc_count,
    Output_section* output_section,
    off_t offset_in_output_section,
    const Relocatable_relocs* rr,
    unsigned char* view,
    typename elfcpp::Elf_types<size>::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_RELA);
 
  gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
    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.
 
template<int size, bool big_endian>
uint64_t
Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
{
  gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
  return this->plt_section()->address() + gsym->plt_offset();
}
 
// The selector for sparc object files.
 
template<int size, bool big_endian>
class Target_selector_sparc : public Target_selector
{
public:
  Target_selector_sparc()
    : Target_selector(elfcpp::EM_NONE, size, big_endian,
                      (size == 64 ? "elf64-sparc" : "elf32-sparc"))
  { }
 
  Target* do_recognize(int machine, int, int)
  {
    switch (size)
      {
      case 64:
        if (machine != elfcpp::EM_SPARCV9)
          return NULL;
        break;
 
      case 32:
        if (machine != elfcpp::EM_SPARC
            && machine != elfcpp::EM_SPARC32PLUS)
          return NULL;
        break;
 
      default:
        return NULL;
      }
 
    return this->instantiate_target();
  }
 
  Target* do_instantiate_target()
  { return new Target_sparc<size, big_endian>(); }
};
 
Target_selector_sparc<32, true> target_selector_sparc32;
Target_selector_sparc<64, true> target_selector_sparc64;
 
} // End anonymous namespace.
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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.20.1/] [gold/] [sparc.cc] - Blame information for rev 205

Line No.	Rev	Author	Line
1	205	julius	`// sparc.cc -- sparc target support for gold.`
2
3			`// Copyright 2008, 2009 Free Software Foundation, Inc.`
4			`// Written by David S. Miller <davem@davemloft.net>.`
5
6			`// This file is part of gold.`
7
8			`// This program is free software; you can redistribute it and/or modify`
9			`// it under the terms of the GNU General Public License as published by`
10			`// the Free Software Foundation; either version 3 of the License, or`
11			`// (at your option) any later version.`
12
13			`// This program is distributed in the hope that it will be useful,`
14			`// but WITHOUT ANY WARRANTY; without even the implied warranty of`
15			`// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
16			`// GNU General Public License for more details.`
17
18			`// You should have received a copy of the GNU General Public License`
19			`// along with this program; if not, write to the Free Software`
20			`// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,`
21			`// MA 02110-1301, USA.`
22
23			`#include "gold.h"`
24
25			`#include <cstdlib>`
26			`#include <cstdio>`
27			`#include <cstring>`
28
29			`#include "elfcpp.h"`
30			`#include "parameters.h"`
31			`#include "reloc.h"`
32			`#include "sparc.h"`
33			`#include "object.h"`
34			`#include "symtab.h"`
35			`#include "layout.h"`
36			`#include "output.h"`
37			`#include "copy-relocs.h"`
38			`#include "target.h"`
39			`#include "target-reloc.h"`
40			`#include "target-select.h"`