d3589edafc
`Data` now references the first byte of the fixup offset within the current fragment. MCAssembler::layout asserts that the fixup offset is within either the fixed-size content or the optional variable-size tail, as this is the most the generic code can validate without knowing the target-specific fixup size. Many backends applyFixup assert ``` assert(Offset + Size <= F.getSize() && "Invalid fixup offset!"); ``` This refactoring allows a subsequent change to move the fixed-size content outside of MCSection::ContentStorage, fixing the -fsanitize=pointer-overflow issue of #150846 Pull Request: https://github.com/llvm/llvm-project/pull/151724
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
//===-- SPIRVAsmBackend.cpp - SPIR-V Assembler Backend ---------*- C++ -*--===//
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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 "MCTargetDesc/SPIRVMCTargetDesc.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSPIRVObjectWriter.h"
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using namespace llvm;
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namespace {
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class SPIRVAsmBackend : public MCAsmBackend {
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public:
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SPIRVAsmBackend(llvm::endianness Endian) : MCAsmBackend(Endian) {}
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void applyFixup(const MCFragment &, const MCFixup &, const MCValue &Target,
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uint8_t *Data, uint64_t Value, bool IsResolved) override {}
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std::unique_ptr<MCObjectTargetWriter>
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createObjectTargetWriter() const override {
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return std::make_unique<MCSPIRVObjectTargetWriter>();
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}
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bool writeNopData(raw_ostream &OS, uint64_t Count,
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const MCSubtargetInfo *STI) const override {
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return false;
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}
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};
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} // end anonymous namespace
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MCAsmBackend *llvm::createSPIRVAsmBackend(const Target &T,
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const MCSubtargetInfo &STI,
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const MCRegisterInfo &MRI,
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const MCTargetOptions &) {
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return new SPIRVAsmBackend(llvm::endianness::little);
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}
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