741b836330
32-bit x86 doesn't have an appropriate relocation type we can use to elide the RTTI proxies, so we need to emit them. This would previously cause crashes when using the relative vtable ABI for 32-bit x86.
69 lines
2.8 KiB
C++
69 lines
2.8 KiB
C++
//===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86TargetObjectFile.h"
|
|
#include "llvm/BinaryFormat/Dwarf.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
|
|
using namespace llvm;
|
|
using namespace dwarf;
|
|
|
|
const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference(
|
|
const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
|
|
MachineModuleInfo *MMI, MCStreamer &Streamer) const {
|
|
|
|
// On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
|
|
// is an indirect pc-relative reference.
|
|
if ((Encoding & DW_EH_PE_indirect) && (Encoding & DW_EH_PE_pcrel)) {
|
|
const MCSymbol *Sym = TM.getSymbol(GV);
|
|
const MCExpr *Res =
|
|
MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
|
|
const MCExpr *Four = MCConstantExpr::create(4, getContext());
|
|
return MCBinaryExpr::createAdd(Res, Four, getContext());
|
|
}
|
|
|
|
return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
|
|
GV, Encoding, TM, MMI, Streamer);
|
|
}
|
|
|
|
MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol(
|
|
const GlobalValue *GV, const TargetMachine &TM,
|
|
MachineModuleInfo *MMI) const {
|
|
return TM.getSymbol(GV);
|
|
}
|
|
|
|
const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
|
|
const GlobalValue *GV, const MCSymbol *Sym, const MCValue &MV,
|
|
int64_t Offset, MachineModuleInfo *MMI, MCStreamer &Streamer) const {
|
|
// On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry
|
|
// from a data section. In case there's an additional offset, then use
|
|
// foo@GOTPCREL+4+<offset>.
|
|
unsigned FinalOff = Offset+MV.getConstant()+4;
|
|
const MCExpr *Res =
|
|
MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
|
|
const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext());
|
|
return MCBinaryExpr::createAdd(Res, Off, getContext());
|
|
}
|
|
|
|
const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
|
|
const MCSymbol *Sym) const {
|
|
return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
|
|
}
|
|
|
|
const MCExpr *X86_64ELFTargetObjectFile::getIndirectSymViaGOTPCRel(
|
|
const GlobalValue *GV, const MCSymbol *Sym, const MCValue &MV,
|
|
int64_t Offset, MachineModuleInfo *MMI, MCStreamer &Streamer) const {
|
|
int64_t FinalOffset = Offset + MV.getConstant();
|
|
const MCExpr *Res =
|
|
MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
|
|
const MCExpr *Off = MCConstantExpr::create(FinalOffset, getContext());
|
|
return MCBinaryExpr::createAdd(Res, Off, getContext());
|
|
}
|