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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//===- AMDGPUELFObjectWriter.cpp - AMDGPU ELF Writer ----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "AMDGPUMCTargetDesc.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCFixup.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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namespace {
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class AMDGPUELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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AMDGPUELFObjectWriter(bool Is64Bit, uint8_t OSABI, bool HasRelocationAddend);
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protected:
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unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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const MCFixup &Fixup, bool IsPCRel) const override;
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};
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} // end anonymous namespace
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AMDGPUELFObjectWriter::AMDGPUELFObjectWriter(bool Is64Bit,
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uint8_t OSABI,
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bool HasRelocationAddend)
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: MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_AMDGPU,
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HasRelocationAddend) {}
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unsigned AMDGPUELFObjectWriter::getRelocType(MCContext &Ctx,
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const MCValue &Target,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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if (const auto *SymA = Target.getSymA()) {
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// SCRATCH_RSRC_DWORD[01] is a special global variable that represents
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// the scratch buffer.
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if (SymA->getSymbol().getName() == "SCRATCH_RSRC_DWORD0" ||
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SymA->getSymbol().getName() == "SCRATCH_RSRC_DWORD1")
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return ELF::R_AMDGPU_ABS32_LO;
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}
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switch (Target.getAccessVariant()) {
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default:
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break;
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case MCSymbolRefExpr::VK_GOTPCREL:
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return ELF::R_AMDGPU_GOTPCREL;
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case MCSymbolRefExpr::VK_AMDGPU_GOTPCREL32_LO:
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return ELF::R_AMDGPU_GOTPCREL32_LO;
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case MCSymbolRefExpr::VK_AMDGPU_GOTPCREL32_HI:
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return ELF::R_AMDGPU_GOTPCREL32_HI;
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case MCSymbolRefExpr::VK_AMDGPU_REL32_LO:
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return ELF::R_AMDGPU_REL32_LO;
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case MCSymbolRefExpr::VK_AMDGPU_REL32_HI:
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return ELF::R_AMDGPU_REL32_HI;
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case MCSymbolRefExpr::VK_AMDGPU_REL64:
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return ELF::R_AMDGPU_REL64;
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}
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switch (Fixup.getKind()) {
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default: break;
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case FK_PCRel_4:
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return ELF::R_AMDGPU_REL32;
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case FK_Data_4:
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case FK_SecRel_4:
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return ELF::R_AMDGPU_ABS32;
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case FK_Data_8:
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return ELF::R_AMDGPU_ABS64;
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}
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llvm_unreachable("unhandled relocation type");
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}
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std::unique_ptr<MCObjectTargetWriter>
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llvm::createAMDGPUELFObjectWriter(bool Is64Bit, uint8_t OSABI,
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bool HasRelocationAddend) {
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return llvm::make_unique<AMDGPUELFObjectWriter>(Is64Bit, OSABI,
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HasRelocationAddend);
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}
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