117 lines
4.2 KiB
C++
117 lines
4.2 KiB
C++
//===- lib/ReaderWriter/ELF/X86/X86TargetHandler.cpp ----------------------===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86TargetHandler.h"
|
|
#include "X86LinkingContext.h"
|
|
|
|
using namespace lld;
|
|
using namespace elf;
|
|
|
|
using namespace llvm::ELF;
|
|
|
|
/// \brief R_386_32 - word32: S + A
|
|
static int reloc32(uint8_t *location, uint64_t P, uint64_t S, uint64_t A) {
|
|
int32_t result = (uint32_t)(S + A);
|
|
*reinterpret_cast<llvm::support::ulittle32_t *>(location) = result |
|
|
(uint32_t)*reinterpret_cast<llvm::support::ulittle32_t *>(location);
|
|
return 0;
|
|
}
|
|
|
|
/// \brief R_386_PC32 - word32: S + A - P
|
|
static int relocPC32(uint8_t *location, uint64_t P, uint64_t S, uint64_t A) {
|
|
uint32_t result = (uint32_t)((S + A) - P);
|
|
*reinterpret_cast<llvm::support::ulittle32_t *>(location) = result +
|
|
(uint32_t)*reinterpret_cast<llvm::support::ulittle32_t *>(location);
|
|
return 0;
|
|
}
|
|
|
|
const Registry::KindStrings X86TargetHandler::kindStrings[] = {
|
|
LLD_KIND_STRING_ENTRY(R_386_NONE),
|
|
LLD_KIND_STRING_ENTRY(R_386_32),
|
|
LLD_KIND_STRING_ENTRY(R_386_PC32),
|
|
LLD_KIND_STRING_ENTRY(R_386_GOT32),
|
|
LLD_KIND_STRING_ENTRY(R_386_PLT32),
|
|
LLD_KIND_STRING_ENTRY(R_386_COPY),
|
|
LLD_KIND_STRING_ENTRY(R_386_GLOB_DAT),
|
|
LLD_KIND_STRING_ENTRY(R_386_JUMP_SLOT),
|
|
LLD_KIND_STRING_ENTRY(R_386_RELATIVE),
|
|
LLD_KIND_STRING_ENTRY(R_386_GOTOFF),
|
|
LLD_KIND_STRING_ENTRY(R_386_GOTPC),
|
|
LLD_KIND_STRING_ENTRY(R_386_32PLT),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_TPOFF),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_IE),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GOTIE),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LE),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GD),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LDM),
|
|
LLD_KIND_STRING_ENTRY(R_386_16),
|
|
LLD_KIND_STRING_ENTRY(R_386_PC16),
|
|
LLD_KIND_STRING_ENTRY(R_386_8),
|
|
LLD_KIND_STRING_ENTRY(R_386_PC8),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GD_32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GD_PUSH),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GD_CALL),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GD_POP),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LDM_32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LDM_PUSH),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LDM_CALL),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LDM_POP),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LDO_32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_IE_32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_LE_32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_DTPMOD32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_DTPOFF32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_TPOFF32),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_GOTDESC),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_DESC_CALL),
|
|
LLD_KIND_STRING_ENTRY(R_386_TLS_DESC),
|
|
LLD_KIND_STRING_ENTRY(R_386_IRELATIVE),
|
|
LLD_KIND_STRING_ENTRY(R_386_NUM),
|
|
LLD_KIND_STRING_END
|
|
};
|
|
|
|
void X86TargetHandler::registerRelocationNames(Registry ®istry) {
|
|
registry.addKindTable(Reference::KindNamespace::ELF, Reference::KindArch::x86,
|
|
kindStrings);
|
|
}
|
|
|
|
error_code X86TargetRelocationHandler::applyRelocation(
|
|
ELFWriter &writer, llvm::FileOutputBuffer &buf, const lld::AtomLayout &atom,
|
|
const Reference &ref) const {
|
|
uint8_t *atomContent = buf.getBufferStart() + atom._fileOffset;
|
|
uint8_t *location = atomContent + ref.offsetInAtom();
|
|
uint64_t targetVAddress = writer.addressOfAtom(ref.target());
|
|
uint64_t relocVAddress = atom._virtualAddr + ref.offsetInAtom();
|
|
|
|
if (ref.kindNamespace() != Reference::KindNamespace::ELF)
|
|
return error_code::success();
|
|
assert(ref.kindArch() == Reference::KindArch::x86);
|
|
switch (ref.kindValue()) {
|
|
case R_386_32:
|
|
reloc32(location, relocVAddress, targetVAddress, ref.addend());
|
|
break;
|
|
case R_386_PC32:
|
|
relocPC32(location, relocVAddress, targetVAddress, ref.addend());
|
|
break;
|
|
default : {
|
|
std::string str;
|
|
llvm::raw_string_ostream s(str);
|
|
s << "Unhandled I386 relocation # " << ref.kindValue();
|
|
s.flush();
|
|
llvm_unreachable(str.c_str());
|
|
}
|
|
}
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
X86TargetHandler::X86TargetHandler(X86LinkingContext &targetInfo)
|
|
: DefaultTargetHandler(targetInfo), _relocationHandler(targetInfo),
|
|
_targetLayout(targetInfo) {}
|