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Add data.rel stuff

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68031 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-03-30 15:27:03 +00:00
parent 217b919cf9
commit 71a7c6cde0
6 changed files with 63 additions and 14 deletions
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5
include/llvm/Target/ELFTargetAsmInfo.h
View File

@ -32,6 +32,11 @@ namespace llvm {
const Section* MergeableStringSection(const GlobalVariable *GV) const;
virtual const Section*
SelectSectionForMachineConst(const Type *Ty) const;
const Section* DataRelSection;
const Section* DataRelLocalSection;
const Section* DataRelROSection;
const Section* DataRelROLocalSection;
};
}

4
include/llvm/Target/TargetAsmInfo.h
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@ -36,8 +36,12 @@ namespace llvm {
Unknown = 0, ///< Custom section
Text, ///< Text section
Data, ///< Data section
DataRel, ///< Contains data that has relocations
DataRelLocal, ///< Contains data that has only local relocations
BSS, ///< BSS section
ROData, ///< Readonly data section
DataRelRO, ///< Contains data that is otherwise readonly
DataRelROLocal, ///< Contains r/o data with only local relocations
RODataMergeStr, ///< Readonly data section (mergeable strings)
RODataMergeConst, ///< Readonly data section (mergeable constants)
SmallData, ///< Small data section

3
lib/Target/DarwinTargetAsmInfo.cpp
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@ -85,6 +85,9 @@ DarwinTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
else
return TextSection;
case SectionKind::Data:
case SectionKind::DataRel:
case SectionKind::DataRelRO:
case SectionKind::DataRelROLocal:
case SectionKind::ThreadData:
case SectionKind::BSS:
case SectionKind::ThreadBSS:

15
lib/Target/ELFTargetAsmInfo.cpp
View File

@ -35,6 +35,13 @@ ELFTargetAsmInfo::ELFTargetAsmInfo(const TargetMachine &TM)
TLSBSSSection = getNamedSection("\t.tbss",
SectionFlags::Writeable | SectionFlags::TLS | SectionFlags::BSS);
DataRelSection = getNamedSection("\t.data.rel", SectionFlags::Writeable);
DataRelLocalSection = getNamedSection("\t.data.rel.local",
SectionFlags::Writeable);
DataRelROSection = getNamedSection("\t.data.rel.ro",
SectionFlags::Writeable);
DataRelROLocalSection = getNamedSection("\t.data.rel.ro.local",
SectionFlags::Writeable);
}
const Section*
@ -67,6 +74,14 @@ ELFTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
case SectionKind::Data:
case SectionKind::SmallData:
return DataSection;
case SectionKind::DataRel:
return DataRelSection;
case SectionKind::DataRelLocal:
return DataRelLocalSection;
case SectionKind::DataRelRO:
return DataRelROSection;
case SectionKind::DataRelROLocal:
return DataRelROLocalSection;
case SectionKind::BSS:
case SectionKind::SmallBSS:
// ELF targets usually have BSS sections

43
lib/Target/TargetAsmInfo.cpp
View File

@ -124,7 +124,7 @@ void TargetAsmInfo::fillDefaultValues() {
DataSection = getUnnamedSection("\t.data", SectionFlags::Writeable);
}
TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm)
TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm)
: TM(tm) {
fillDefaultValues();
}
@ -220,14 +220,18 @@ TargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
unsigned Reloc = RelocBehaviour();
// We already did a query for 'all' relocs, thus - early exits.
if (Reloc == Reloc::LocalOrGlobal)
return SectionKind::Data;
else if (Reloc == Reloc::None)
if (Reloc == Reloc::LocalOrGlobal) {
return (C->ContainsRelocations(Reloc::Local) ?
SectionKind::DataRelROLocal : SectionKind::DataRelRO);
} else if (Reloc == Reloc::None)
return SectionKind::ROData;
else {
// Ok, target wants something funny. Honour it.
return (C->ContainsRelocations(Reloc) ?
SectionKind::Data : SectionKind::ROData);
if (C->ContainsRelocations(Reloc)) {
return (Reloc == Reloc::Local ?
SectionKind::DataRelROLocal : SectionKind::DataRelRO);
} else
return SectionKind::ROData;
}
} else {
// Check, if initializer is a null-terminated string
@ -238,8 +242,19 @@ TargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
}
}
// Variable is not constant or thread-local - emit to generic data section.
return (isThreadLocal ? SectionKind::ThreadData : SectionKind::Data);
// Variable either is not constant or thread-local - output to data section.
if (isThreadLocal)
return SectionKind::ThreadData;
if (GVar->hasInitializer()) {
Constant *C = GVar->getInitializer();
unsigned Reloc = RelocBehaviour();
if (Reloc != Reloc::None && C->ContainsRelocations(Reloc))
return (C->ContainsRelocations(Reloc::Local) ?
SectionKind::DataRelLocal : SectionKind::DataRel);
}
return SectionKind::Data;
}
unsigned
@ -259,6 +274,10 @@ TargetAsmInfo::SectionFlagsForGlobal(const GlobalValue *GV,
Flags |= SectionFlags::TLS;
// FALLS THROUGH
case SectionKind::Data:
case SectionKind::DataRel:
case SectionKind::DataRelLocal:
case SectionKind::DataRelRO:
case SectionKind::DataRelROLocal:
case SectionKind::BSS:
Flags |= SectionFlags::Writeable;
break;
@ -360,6 +379,14 @@ TargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
return ".gnu.linkonce.t." + GV->getName();
case SectionKind::Data:
return ".gnu.linkonce.d." + GV->getName();
case SectionKind::DataRel:
return ".gnu.linkonce.d.rel" + GV->getName();
case SectionKind::DataRelLocal:
return ".gnu.linkonce.d.rel.local" + GV->getName();
case SectionKind::DataRelRO:
return ".gnu.linkonce.d.rel.ro" + GV->getName();
case SectionKind::DataRelROLocal:
return ".gnu.linkonce.d.rel.ro.local" + GV->getName();
case SectionKind::SmallData:
return ".gnu.linkonce.s." + GV->getName();
case SectionKind::BSS:

7
lib/Target/X86/X86TargetAsmInfo.cpp
View File

@ -305,17 +305,12 @@ X86COFFTargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
switch (kind) {
case SectionKind::Text:
return ".text$linkonce" + GV->getName();
case SectionKind::Data:
case SectionKind::BSS:
case SectionKind::ThreadData:
case SectionKind::ThreadBSS:
return ".data$linkonce" + GV->getName();
case SectionKind::ROData:
case SectionKind::RODataMergeConst:
case SectionKind::RODataMergeStr:
return ".rdata$linkonce" + GV->getName();
default:
assert(0 && "Unknown section kind");
return ".data$linkonce" + GV->getName();
}
return NULL;
}