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Change MCSectionELF to represent a section semantically instead of

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syntactically as a string, very similiar to what Chris did with MachO.
The parsing support and validation is not introduced yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78890 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes
2009-08-13 05:07:35 +00:00
parent 62728dc14d
commit b808588a3a
11 changed files with 512 additions and 197 deletions
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lib/CodeGen/ELFWriter.cpp
+20 -16
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@@ -43,7 +43,7 @@
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetELFWriterInfo.h"
@@ -178,30 +178,32 @@ void ELFWriter::addExternalSymbol(const char *External) {
// getCtorSection - Get the static constructor section
ELFSection &ELFWriter::getCtorSection() {
const MCSection *Ctor = TLOF.getStaticCtorSection();
return getSection(((MCSectionELF*)Ctor)->getName(), ELFSection::SHT_PROGBITS,
const MCSectionELF *Ctor = (const MCSectionELF *)TLOF.getStaticCtorSection();
return getSection(Ctor->getSectionName(), ELFSection::SHT_PROGBITS,
getElfSectionFlags(Ctor->getKind()));
}
// getDtorSection - Get the static destructor section
ELFSection &ELFWriter::getDtorSection() {
const MCSection *Dtor = TLOF.getStaticDtorSection();
return getSection(((MCSectionELF*)Dtor)->getName(), ELFSection::SHT_PROGBITS,
const MCSectionELF *Dtor = (const MCSectionELF *)TLOF.getStaticDtorSection();
return getSection(Dtor->getSectionName(), ELFSection::SHT_PROGBITS,
getElfSectionFlags(Dtor->getKind()));
}
// getTextSection - Get the text section for the specified function
ELFSection &ELFWriter::getTextSection(Function *F) {
const MCSection *Text = TLOF.SectionForGlobal(F, Mang, TM);
return getSection(((MCSectionELF*)Text)->getName(), ELFSection::SHT_PROGBITS,
const MCSectionELF *Text =
(const MCSectionELF *)TLOF.SectionForGlobal(F, Mang, TM);
return getSection(Text->getSectionName(), ELFSection::SHT_PROGBITS,
getElfSectionFlags(Text->getKind()));
}
// getJumpTableSection - Get a read only section for constants when
// emitting jump tables. TODO: add PIC support
ELFSection &ELFWriter::getJumpTableSection() {
const MCSection *JT = TLOF.getSectionForConstant(SectionKind::getReadOnly());
return getSection(((MCSectionELF*)JT)->getName(),
const MCSectionELF *JT =
(const MCSectionELF *)TLOF.getSectionForConstant(SectionKind::getReadOnly());
return getSection(JT->getSectionName(),
ELFSection::SHT_PROGBITS,
getElfSectionFlags(JT->getKind()),
TM.getTargetData()->getPointerABIAlignment());
@@ -226,8 +228,9 @@ ELFSection &ELFWriter::getConstantPoolSection(MachineConstantPoolEntry &CPE) {
}
}
const MCSection *CPSect = TLOF.getSectionForConstant(Kind);
return getSection(((MCSectionELF*)CPSect)->getName(),
const MCSectionELF *CPSect =
(const MCSectionELF *)TLOF.getSectionForConstant(Kind);
return getSection(CPSect->getSectionName(),
ELFSection::SHT_PROGBITS,
getElfSectionFlags(Kind),
CPE.getAlignment());
@@ -358,8 +361,9 @@ void ELFWriter::EmitGlobal(const GlobalValue *GV) {
return;
// Get the ELF section where this global belongs from TLOF
const MCSection *S = TLOF.SectionForGlobal(GV, Mang, TM);
SectionKind Kind = ((MCSectionELF*)S)->getKind();
const MCSectionELF *S =
(const MCSectionELF *)TLOF.SectionForGlobal(GV, Mang, TM);
SectionKind Kind = S->getKind();
unsigned SectionFlags = getElfSectionFlags(Kind);
// The symbol align should update the section alignment if needed
@@ -370,7 +374,7 @@ void ELFWriter::EmitGlobal(const GlobalValue *GV) {
if (isELFCommonSym(GVar)) {
GblSym->SectionIdx = ELFSection::SHN_COMMON;
getSection(((MCSectionELF*)S)->getName(),
getSection(S->getSectionName(),
ELFSection::SHT_NOBITS, SectionFlags, 1);
// A new linkonce section is created for each global in the
@@ -380,7 +384,7 @@ void ELFWriter::EmitGlobal(const GlobalValue *GV) {
} else if (isELFBssSym(GVar, Kind)) {
ELFSection &ES =
getSection(((MCSectionELF*)S)->getName(), ELFSection::SHT_NOBITS,
getSection(S->getSectionName(), ELFSection::SHT_NOBITS,
SectionFlags);
GblSym->SectionIdx = ES.SectionIdx;
@@ -396,7 +400,7 @@ void ELFWriter::EmitGlobal(const GlobalValue *GV) {
} else { // The symbol must go to some kind of data section
ELFSection &ES =
getSection(((MCSectionELF*)S)->getName(), ELFSection::SHT_PROGBITS,
getSection(S->getSectionName(), ELFSection::SHT_PROGBITS,
SectionFlags);
GblSym->SectionIdx = ES.SectionIdx;