168 lines
3.7 KiB
C++
168 lines
3.7 KiB
C++
// i386.cc -- i386 target support for gold.
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#include "gold.h"
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#include "elfcpp.h"
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#include "i386.h"
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#include "object.h"
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#include "target.h"
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#include "target-reloc.h"
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#include "target-select.h"
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namespace
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{
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using namespace gold;
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// The i386 target class.
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class Target_i386 : public Sized_target<32, false>
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{
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public:
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Target_i386()
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: Sized_target<32, false>(&i386_info)
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{ }
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void
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relocate_section(const Symbol_table* symtab,
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Sized_object<32, false>*,
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unsigned int,
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const unsigned char*,
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size_t,
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unsigned int,
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const elfcpp::Elf_types<32>::Elf_Addr*,
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Symbol**,
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unsigned char*,
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elfcpp::Elf_types<32>::Elf_Addr,
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off_t);
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// The class which implements relocation.
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struct Relocate
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{
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inline void
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operator()(Sized_object<32, false>*, const elfcpp::Rel<32, false>&,
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unsigned int r_type, Sized_symbol<32>*,
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elfcpp::Elf_types<32>::Elf_Addr,
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unsigned char*, elfcpp::Elf_types<32>::Elf_Addr);
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};
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private:
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static const Target::Target_info i386_info;
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};
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const Target::Target_info Target_i386::i386_info =
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{
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32, // size
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false, // is_big_endian
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elfcpp::EM_386, // machine_code
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false, // has_make_symbol
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false, // has_resolve,
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0x08048000, // text_segment_address,
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0x1000, // abi_pagesize
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0x1000 // common_pagesize
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};
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// Perform a relocation.
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inline void
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Target_i386::Relocate::operator()(Sized_object<32, false>* object,
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const elfcpp::Rel<32, false>&,
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unsigned int r_type,
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Sized_symbol<32>*,
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elfcpp::Elf_types<32>::Elf_Addr value,
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unsigned char* view,
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elfcpp::Elf_types<32>::Elf_Addr address)
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{
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switch (r_type)
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{
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case elfcpp::R_386_NONE:
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break;
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case elfcpp::R_386_32:
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{
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elfcpp::Elf_Word* wv = reinterpret_cast<elfcpp::Elf_Word*>(view);
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unsigned int x = elfcpp::read_elf_word<false>(wv);
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elfcpp::write_elf_word<false>(wv, x + value);
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}
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break;
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case elfcpp::R_386_PC32:
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{
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elfcpp::Elf_Word* wv = reinterpret_cast<elfcpp::Elf_Word*>(view);
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unsigned int x = elfcpp::read_elf_word<false>(wv);
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elfcpp::write_elf_word<false>(wv, x + value - address);
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}
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break;
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default:
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fprintf(stderr, _("%s: %s: unsupported reloc %u\n"),
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program_name, object->name().c_str(), r_type);
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// gold_exit(false);
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}
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}
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// Relocate section data.
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void
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Target_i386::relocate_section(const Symbol_table* symtab,
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Sized_object<32, false>* object,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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unsigned int local_count,
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const elfcpp::Elf_types<32>::Elf_Addr* values,
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Symbol** global_syms,
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unsigned char* view,
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elfcpp::Elf_types<32>::Elf_Addr address,
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off_t view_size)
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{
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if (sh_type == elfcpp::SHT_RELA)
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{
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fprintf(stderr, _("%s: %s: unsupported RELA reloc section\n"),
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program_name, object->name().c_str());
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gold_exit(false);
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}
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gold::relocate_section<32, false, elfcpp::SHT_REL, Target_i386::Relocate>(
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symtab,
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object,
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prelocs,
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reloc_count,
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local_count,
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values,
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global_syms,
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view,
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address,
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view_size);
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}
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// The i386 target.
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Target_i386 target_i386;
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// The selector for i386 object files.
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class Target_selector_i386 : public Target_selector
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{
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public:
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Target_selector_i386()
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: Target_selector(elfcpp::EM_386, 32, false)
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{ }
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Target*
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recognize(int machine, int osabi, int abiversion) const;
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};
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// Recognize an i386 object file when we already know that the machine
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// number is EM_386.
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Target*
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Target_selector_i386::recognize(int, int, int) const
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{
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return &target_i386;
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}
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Target_selector_i386 target_selector_i386;
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} // End anonymous namespace.
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