| //===-- AMDGPUELFObjectWriter.cpp - AMDGPU ELF Writer ----------------------==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| /// \file |
| //===----------------------------------------------------------------------===// |
| |
| #include "AMDGPUMCTargetDesc.h" |
| #include "llvm/MC/MCELFObjectWriter.h" |
| #include "llvm/MC/MCFixup.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| class AMDGPUELFObjectWriter : public MCELFObjectTargetWriter { |
| public: |
| AMDGPUELFObjectWriter(bool Is64Bit, bool HasRelocationAddend); |
| protected: |
| unsigned getRelocType(MCContext &Ctx, const MCValue &Target, |
| const MCFixup &Fixup, bool IsPCRel) const override; |
| }; |
| |
| |
| } // End anonymous namespace |
| |
| AMDGPUELFObjectWriter::AMDGPUELFObjectWriter(bool Is64Bit, |
| bool HasRelocationAddend) |
| : MCELFObjectTargetWriter(Is64Bit, |
| ELF::ELFOSABI_AMDGPU_HSA, |
| ELF::EM_AMDGPU, |
| HasRelocationAddend) { } |
| |
| unsigned AMDGPUELFObjectWriter::getRelocType(MCContext &Ctx, |
| const MCValue &Target, |
| const MCFixup &Fixup, |
| bool IsPCRel) const { |
| // SCRATCH_RSRC_DWORD[01] is a special global variable that represents |
| // the scratch buffer. |
| if (Target.getSymA()->getSymbol().getName() == "SCRATCH_RSRC_DWORD0") |
| return ELF::R_AMDGPU_ABS32_LO; |
| if (Target.getSymA()->getSymbol().getName() == "SCRATCH_RSRC_DWORD1") |
| return ELF::R_AMDGPU_ABS32_HI; |
| |
| switch (Target.getAccessVariant()) { |
| default: |
| break; |
| case MCSymbolRefExpr::VK_GOTPCREL: |
| return ELF::R_AMDGPU_GOTPCREL; |
| } |
| |
| switch (Fixup.getKind()) { |
| default: break; |
| case FK_PCRel_4: |
| return ELF::R_AMDGPU_REL32; |
| case FK_SecRel_4: |
| return ELF::R_AMDGPU_ABS32; |
| } |
| |
| llvm_unreachable("unhandled relocation type"); |
| } |
| |
| |
| MCObjectWriter *llvm::createAMDGPUELFObjectWriter(bool Is64Bit, |
| bool HasRelocationAddend, |
| raw_pwrite_stream &OS) { |
| MCELFObjectTargetWriter *MOTW = |
| new AMDGPUELFObjectWriter(Is64Bit, HasRelocationAddend); |
| return createELFObjectWriter(MOTW, OS, true); |
| } |