611a271e8d
Add support for writing relocations. Since the symbol numbering is only available after the symbols are written, the relocations are collected in a vector. At write time, the relocations are converted using the symbols ids, compressed and written out. A relocation data record is limited to 32K-1 bytes, which requires making sure that larger relocation data is written into multiple records.
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
//===- SystemZGOFFObjectWriter.cpp - SystemZ GOFF 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 "MCTargetDesc/SystemZMCTargetDesc.h"
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#include "SystemZMCAsmInfo.h"
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#include "llvm/MC/MCGOFFObjectWriter.h"
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#include <memory>
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using namespace llvm;
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namespace {
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class SystemZGOFFObjectWriter : public MCGOFFObjectTargetWriter {
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public:
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SystemZGOFFObjectWriter();
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unsigned getRelocType(const MCValue &Target,
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const MCFixup &Fixup) const override;
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};
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} // end anonymous namespace
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SystemZGOFFObjectWriter::SystemZGOFFObjectWriter()
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: MCGOFFObjectTargetWriter() {}
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unsigned SystemZGOFFObjectWriter::getRelocType(const MCValue &Target,
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const MCFixup &Fixup) const {
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switch (Target.getSpecifier()) {
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case SystemZ::S_RCon:
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return Reloc_Type_RCon;
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case SystemZ::S_VCon:
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return Reloc_Type_VCon;
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case SystemZ::S_QCon:
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return Reloc_Type_QCon;
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case SystemZ::S_None:
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if (Fixup.isPCRel())
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return Reloc_Type_RICon;
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return Reloc_Type_ACon;
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}
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llvm_unreachable("Modifier not supported");
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}
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std::unique_ptr<MCObjectTargetWriter> llvm::createSystemZGOFFObjectWriter() {
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return std::make_unique<SystemZGOFFObjectWriter>();
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}
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