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https://github.com/c64scene-ar/llvm-6502.git
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8c6ed05157
Eliminate the PersonalityPrefix/Suffix & NeedsIndirectEncoding fields from MAI: they aren't part of the asm syntax, they are related to the structure of the object file. To replace their functionality, add a new TLOF::getSymbolForDwarfGlobalReference method which asks targets to decide how to reference a global from EH in a pc-relative way. The default implementation just returns the symbol. The default darwin implementation references the symbol through an indirect $non_lazy_ptr stub. The bizarro x86-64 darwin specialization handles the weird "foo@GOTPCREL+4" hack. DwarfException.cpp now uses this to emit the reference to the symbol in the right way, and this also eliminates another horrible hack from DwarfException.cpp: - if (strcmp(MAI->getPersonalitySuffix(), "+4@GOTPCREL")) - O << "-" << MAI->getPCSymbol(); git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81991 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
//===-- llvm/Target/X86/X86TargetObjectFile.cpp - X86 Object Info ---------===//
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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 "X86TargetObjectFile.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/MC/MCExpr.h"
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using namespace llvm;
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const MCExpr *X8664_MachoTargetObjectFile::
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getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
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bool &IsIndirect, bool &IsPCRel) const {
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// On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
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// is an indirect pc-relative reference.
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IsIndirect = true;
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IsPCRel = true;
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SmallString<128> Name;
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Mang->getNameWithPrefix(Name, GV, false);
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Name += "@GOTPCREL";
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const MCExpr *Res =
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MCSymbolRefExpr::Create(Name.str(), getContext());
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const MCExpr *Four = MCConstantExpr::Create(4, getContext());
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return MCBinaryExpr::CreateAdd(Res, Four, getContext());
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}
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