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[X86][ELF] Correct relocation for DWARF TLS references

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Previously we had only Linux using DTPOFF for these; all X86 ELF
targets should. Fixes a side issue mentioned in PR21077.

Differential Revision: http://reviews.llvm.org/D8011


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231130 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Paul Robinson 2015-03-03 21:01:27 +00:00
parent 4549d733da
commit 1f8fa31e5d
4 changed files with 21 additions and 12 deletions
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2
lib/Target/X86/X86TargetMachine.cpp
View File

@ -40,7 +40,7 @@ static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
if (TT.isOSLinux())
return make_unique<X86LinuxTargetObjectFile>();
if (TT.isOSBinFormatELF())
return make_unique<TargetLoweringObjectFileELF>();
return make_unique<X86ELFTargetObjectFile>();
if (TT.isKnownWindowsMSVCEnvironment())
return make_unique<X86WindowsTargetObjectFile>();
if (TT.isOSBinFormatCOFF())

11
lib/Target/X86/X86TargetObjectFile.cpp
View File

@ -62,18 +62,17 @@ const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
return MCBinaryExpr::CreateAdd(Res, Off, getContext());
}
const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
const MCSymbol *Sym) const {
return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
}
void
X86LinuxTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
TargetLoweringObjectFileELF::Initialize(Ctx, TM);
InitializeELF(TM.Options.UseInitArray);
}
const MCExpr *
X86LinuxTargetObjectFile::getDebugThreadLocalSymbol(
const MCSymbol *Sym) const {
return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
}
const MCExpr *X86WindowsTargetObjectFile::getExecutableRelativeSymbol(
const ConstantExpr *CE, Mangler &Mang, const TargetMachine &TM) const {
// We are looking for the difference of two symbols, need a subtraction

14
lib/Target/X86/X86TargetObjectFile.h
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@ -38,15 +38,19 @@ namespace llvm {
int64_t Offset) const override;
};
/// X86LinuxTargetObjectFile - This implementation is used for linux x86
/// and x86-64.
class X86LinuxTargetObjectFile : public TargetLoweringObjectFileELF {
void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
/// \brief This implemenatation is used for X86 ELF targets that don't
/// have a further specialization.
class X86ELFTargetObjectFile : public TargetLoweringObjectFileELF {
/// \brief Describe a TLS variable address within debug info.
const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const override;
};
/// X86LinuxTargetObjectFile - This implementation is used for linux x86
/// and x86-64.
class X86LinuxTargetObjectFile : public X86ELFTargetObjectFile {
void Initialize(MCContext &Ctx, const TargetMachine &TM) override;
};
/// \brief This implementation is used for Windows targets on x86 and x86-64.
class X86WindowsTargetObjectFile : public TargetLoweringObjectFileCOFF {
const MCExpr *

6
test/DebugInfo/X86/tls.ll
View File

@ -7,6 +7,12 @@
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-unknown-linux-gnu -split-dwarf=Enable \
; RUN: | FileCheck --check-prefix=CHECK --check-prefix=FISSION %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-scei-ps4 \
; RUN: | FileCheck --check-prefix=CHECK --check-prefix=SINGLE --check-prefix=SINGLE-64 %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-unknown-freebsd \
; RUN: | FileCheck --check-prefix=CHECK --check-prefix=SINGLE --check-prefix=SINGLE-64 %s
; FIXME: add relocation and DWARF expression support to llvm-dwarfdump & use
; that here instead of raw assembly printing