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Move the support for using .init_array from ARM to the generic

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TargetLoweringObjectFileELF. Use this to support it on X86. Unlike ARM,
on X86 it is not easy to find out if .init_array should be used or not, so
the decision is made via TargetOptions and defaults to off.

Add a command line option to llc that enables it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158692 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2012-06-19 00:48:28 +00:00
parent f6fc855a00
commit d6b43a317e
10 changed files with 99 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
lib/Target/ARM/ARMTargetObjectFile.cpp
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@ -24,20 +24,11 @@ using namespace dwarf;
void ARMElfTargetObjectFile::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
bool isAAPCS_ABI = TM.getSubtarget<ARMSubtarget>().isAAPCS_ABI();
TargetLoweringObjectFileELF::Initialize(Ctx, TM);
isAAPCS_ABI = TM.getSubtarget<ARMSubtarget>().isAAPCS_ABI();
InitializeELF(isAAPCS_ABI);
if (isAAPCS_ABI) {
StaticCtorSection =
getContext().getELFSection(".init_array", ELF::SHT_INIT_ARRAY,
ELF::SHF_WRITE |
ELF::SHF_ALLOC,
SectionKind::getDataRel());
StaticDtorSection =
getContext().getELFSection(".fini_array", ELF::SHT_FINI_ARRAY,
ELF::SHF_WRITE |
ELF::SHF_ALLOC,
SectionKind::getDataRel());
LSDASection = NULL;
}
@ -47,33 +38,3 @@ void ARMElfTargetObjectFile::Initialize(MCContext &Ctx,
0,
SectionKind::getMetadata());
}
const MCSection *
ARMElfTargetObjectFile::getStaticCtorSection(unsigned Priority) const {
if (!isAAPCS_ABI)
return TargetLoweringObjectFileELF::getStaticCtorSection(Priority);
if (Priority == 65535)
return StaticCtorSection;
// Emit ctors in priority order.
std::string Name = std::string(".init_array.") + utostr(Priority);
return getContext().getELFSection(Name, ELF::SHT_INIT_ARRAY,
ELF::SHF_ALLOC | ELF::SHF_WRITE,
SectionKind::getDataRel());
}
const MCSection *
ARMElfTargetObjectFile::getStaticDtorSection(unsigned Priority) const {
if (!isAAPCS_ABI)
return TargetLoweringObjectFileELF::getStaticDtorSection(Priority);
if (Priority == 65535)
return StaticDtorSection;
// Emit dtors in priority order.
std::string Name = std::string(".fini_array.") + utostr(Priority);
return getContext().getELFSection(Name, ELF::SHT_FINI_ARRAY,
ELF::SHF_ALLOC | ELF::SHF_WRITE,
SectionKind::getDataRel());
}