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Add a funciton to get the segment name of a section.

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On MachO, sections also have segment names. When a tool looking at a .o file
prints a segment name, this is what they mean. In reality, a .o has only one,
anonymous, segment.

This patch adds a MachO only function to fetch that segment name. I named it
getSectionFinalSegmentName since the main use for the name seems to be informing
the linker with segment this section should go to.

The patch also changes MachOObjectFile::getSectionName to return just the
section name instead of computing SegmentName,SectionName.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170095 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2012-12-13 04:07:18 +00:00
parent 99c86c72b2
commit e3ec87a6f7
4 changed files with 49 additions and 15 deletions
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14
tools/llvm-objdump/llvm-objdump.cpp
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@ -28,6 +28,7 @@
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
@ -72,9 +73,9 @@ static cl::opt<bool>
SymbolTable("t", cl::desc("Display the symbol table"));
static cl::opt<bool>
MachO("macho", cl::desc("Use MachO specific object file parser"));
MachOOpt("macho", cl::desc("Use MachO specific object file parser"));
static cl::alias
MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachO));
MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachOOpt));
cl::opt<std::string>
llvm::TripleName("triple", cl::desc("Target triple to disassemble for, "
@ -567,6 +568,13 @@ static void PrintSymbolTable(const ObjectFile *o) {
else if (Section == o->end_sections())
outs() << "*UND*";
else {
if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(o)) {
StringRef SegmentName;
DataRefImpl DR = Section->getRawDataRefImpl();
if (error(MachO->getSectionFinalSegmentName(DR, SegmentName)))
SegmentName = "";
outs() << SegmentName << ",";
}
StringRef SectionName;
if (error(Section->getName(SectionName)))
SectionName = "";
@ -640,7 +648,7 @@ static void DumpInput(StringRef file) {
return;
}
if (MachO && Disassemble) {
if (MachOOpt && Disassemble) {
DisassembleInputMachO(file);
return;
}