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//===- AMDGPU.cpp ---------------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "InputFiles.h"
#include "Symbols.h"
#include "Target.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/Object/ELF.h"
#include "llvm/Support/Endian.h"
using namespace llvm;
using namespace llvm::object;
using namespace llvm::support::endian;
using namespace llvm::ELF;
using namespace lld;
using namespace lld::elf;
namespace {
class AMDGPU final : public TargetInfo {
public:
AMDGPU();
uint32_t calcEFlags() const override;
void relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const override;
RelExpr getRelExpr(RelType Type, const Symbol &S,
const uint8_t *Loc) const override;
};
} // namespace
AMDGPU::AMDGPU() {
RelativeRel = R_AMDGPU_RELATIVE64;
GotRel = R_AMDGPU_ABS64;
GotEntrySize = 8;
}
static uint32_t getEFlags(InputFile *File) {
return cast<ObjFile<ELF64LE>>(File)->getObj().getHeader()->e_flags;
}
uint32_t AMDGPU::calcEFlags() const {
assert(!ObjectFiles.empty());
uint32_t Ret = getEFlags(ObjectFiles[0]);
// Verify that all input files have the same e_flags.
for (InputFile *F : makeArrayRef(ObjectFiles).slice(1)) {
if (Ret == getEFlags(F))
continue;
error("incompatible e_flags: " + toString(F));
return 0;
}
return Ret;
}
void AMDGPU::relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const {
switch (Type) {
case R_AMDGPU_ABS32:
case R_AMDGPU_GOTPCREL:
case R_AMDGPU_GOTPCREL32_LO:
case R_AMDGPU_REL32:
case R_AMDGPU_REL32_LO:
write32le(Loc, Val);
break;
case R_AMDGPU_ABS64:
write64le(Loc, Val);
break;
case R_AMDGPU_GOTPCREL32_HI:
case R_AMDGPU_REL32_HI:
write32le(Loc, Val >> 32);
break;
default:
error(getErrorLocation(Loc) + "unrecognized reloc " + Twine(Type));
}
}
RelExpr AMDGPU::getRelExpr(RelType Type, const Symbol &S,
const uint8_t *Loc) const {
switch (Type) {
case R_AMDGPU_ABS32:
case R_AMDGPU_ABS64:
return R_ABS;
case R_AMDGPU_REL32:
case R_AMDGPU_REL32_LO:
case R_AMDGPU_REL32_HI:
return R_PC;
case R_AMDGPU_GOTPCREL:
case R_AMDGPU_GOTPCREL32_LO:
case R_AMDGPU_GOTPCREL32_HI:
return R_GOT_PC;
default:
return R_INVALID;
}
}
TargetInfo *elf::getAMDGPUTargetInfo() {
static AMDGPU Target;
return &Target;
}
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