| //===- AMDGPU.cpp ---------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #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 relocate(uint8_t *loc, const Relocation &rel, |
| uint64_t val) const override; |
| RelExpr getRelExpr(RelType type, const Symbol &s, |
| const uint8_t *loc) const override; |
| RelType getDynRel(RelType type) const override; |
| }; |
| } // namespace |
| |
| AMDGPU::AMDGPU() { |
| relativeRel = R_AMDGPU_RELATIVE64; |
| gotRel = R_AMDGPU_ABS64; |
| noneRel = R_AMDGPU_NONE; |
| symbolicRel = R_AMDGPU_ABS64; |
| } |
| |
| 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::relocate(uint8_t *loc, const Relocation &rel, uint64_t val) const { |
| switch (rel.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: |
| case R_AMDGPU_REL64: |
| write64le(loc, val); |
| break; |
| case R_AMDGPU_GOTPCREL32_HI: |
| case R_AMDGPU_REL32_HI: |
| write32le(loc, val >> 32); |
| break; |
| default: |
| llvm_unreachable("unknown relocation"); |
| } |
| } |
| |
| 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: |
| case R_AMDGPU_REL64: |
| return R_PC; |
| case R_AMDGPU_GOTPCREL: |
| case R_AMDGPU_GOTPCREL32_LO: |
| case R_AMDGPU_GOTPCREL32_HI: |
| return R_GOT_PC; |
| default: |
| error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) + |
| ") against symbol " + toString(s)); |
| return R_NONE; |
| } |
| } |
| |
| RelType AMDGPU::getDynRel(RelType type) const { |
| if (type == R_AMDGPU_ABS64) |
| return type; |
| return R_AMDGPU_NONE; |
| } |
| |
| TargetInfo *elf::getAMDGPUTargetInfo() { |
| static AMDGPU target; |
| return ⌖ |
| } |