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
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
//===-- MipsAsmBackend.h - Mips Asm Backend ------------------------------===//
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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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//
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// This file defines the MipsAsmBackend class.
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//
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//===----------------------------------------------------------------------===//
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//
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#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
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#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
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#include "MCTargetDesc/MipsFixupKinds.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/TargetParser/Triple.h"
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namespace llvm {
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class MCAssembler;
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struct MCFixupKindInfo;
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class MCRegisterInfo;
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class Target;
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class MipsAsmBackend : public MCAsmBackend {
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Triple TheTriple;
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bool IsN32;
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public:
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MipsAsmBackend(const Target &T, const MCRegisterInfo &MRI, const Triple &TT,
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StringRef CPU, bool N32)
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: MCAsmBackend(TT.isLittleEndian() ? llvm::endianness::little
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: llvm::endianness::big),
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TheTriple(TT), IsN32(N32) {}
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std::unique_ptr<MCObjectTargetWriter>
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createObjectTargetWriter() const override;
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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::optional<MCFixupKind> getFixupKind(StringRef Name) const override;
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MCFixupKindInfo getFixupKindInfo(MCFixupKind Kind) const override;
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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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}; // class MipsAsmBackend
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} // namespace
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#endif
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