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https://github.com/c64scene-ar/llvm-6502.git
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7cc1de1090
This changes Win64EHEmitter into a utility WinEH UnwindEmitter that can be shared across multiple architectures and a target specific bit which is overridden (Win64::UnwindEmitter). This enables sharing the section selection code across X86 and the intended use in ARM for emitting unwind information for Windows on ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215050 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
//===- lib/MC/MCWinEH.cpp - Windows EH implementation ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCWinEH.h"
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#include "llvm/Support/COFF.h"
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namespace llvm {
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namespace WinEH {
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const MCSection *UnwindEmitter::GetPDataSection(StringRef Suffix,
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MCContext &Context) {
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if (Suffix.empty())
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return Context.getObjectFileInfo()->getPDataSection();
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return Context.getCOFFSection((".pdata" + Suffix).str(),
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COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
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COFF::IMAGE_SCN_MEM_READ,
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SectionKind::getDataRel());
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}
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const MCSection *UnwindEmitter::GetXDataSection(StringRef Suffix,
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MCContext &Context) {
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if (Suffix.empty())
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return Context.getObjectFileInfo()->getXDataSection();
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return Context.getCOFFSection((".xdata" + Suffix).str(),
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COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
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COFF::IMAGE_SCN_MEM_READ,
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SectionKind::getDataRel());
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}
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StringRef UnwindEmitter::GetSectionSuffix(const MCSymbol *Function) {
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if (!Function || !Function->isInSection())
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return "";
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const MCSection *FunctionSection = &Function->getSection();
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if (const auto Section = dyn_cast<MCSectionCOFF>(FunctionSection)) {
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StringRef Name = Section->getSectionName();
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size_t Dollar = Name.find('$');
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size_t Dot = Name.find('.', 1);
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if (Dollar == StringRef::npos && Dot == StringRef::npos)
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return "";
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if (Dot == StringRef::npos)
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return Name.substr(Dollar);
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if (Dollar == StringRef::npos || Dot < Dollar)
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return Name.substr(Dot);
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return Name.substr(Dollar);
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}
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return "";
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}
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}
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}
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