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