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Add a SectionBase struct.

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Use it to share code and when we don't need to know if we have a 32 or 64
bit Section.

llvm-svn: 179072
This commit is contained in:
Rafael Espindola 2013-04-08 23:57:13 +00:00
parent e99e862deb
commit f3e0e85032
2 changed files with 30 additions and 24 deletions
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6
include/llvm/Object/MachO.h
View File

@ -27,6 +27,11 @@ namespace llvm {
namespace object {
namespace MachOFormat {
struct SectionBase {
char Name[16];
char SegmentName[16];
};
template<bool is64Bits>
struct Section;
@ -254,6 +259,7 @@ private:
typedef SmallVector<DataRefImpl, 1> SectionList;
SectionList Sections;
const MachOFormat::SectionBase *getSectionBase(DataRefImpl DRI) const;
void moveToNextSection(DataRefImpl &DRI) const;

48
lib/Object/MachOObjectFile.cpp
View File

@ -509,11 +509,8 @@ error_code MachOObjectFile::getSectionNext(DataRefImpl DRI,
const MachOFormat::Section<false> *
MachOObjectFile::getSection(DataRefImpl DRI) const {
assert(!is64Bit());
const MachOFormat::LoadCommand *Command = getLoadCommandInfo(DRI.d.a);
uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(Command);
uintptr_t SectionAddr = CommandAddr + sizeof(macho::SegmentLoadCommand) +
DRI.d.b * sizeof(MachOFormat::Section<false>);
return reinterpret_cast<const MachOFormat::Section<false>*>(SectionAddr);
const MachOFormat::SectionBase *Addr = getSectionBase(DRI);
return reinterpret_cast<const MachOFormat::Section<false>*>(Addr);
}
std::size_t MachOObjectFile::getSectionIndex(DataRefImpl Sec) const {
@ -523,14 +520,27 @@ std::size_t MachOObjectFile::getSectionIndex(DataRefImpl Sec) const {
return std::distance(Sections.begin(), loc);
}
const MachOFormat::SectionBase*
MachOObjectFile::getSectionBase(DataRefImpl DRI) const {
const MachOFormat::LoadCommand *Command = getLoadCommandInfo(DRI.d.a);
uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(Command);
bool Is64 = is64Bit();
unsigned SegmentLoadSize =
Is64 ? sizeof(MachOFormat::SegmentLoadCommand<true>) :
sizeof(MachOFormat::SegmentLoadCommand<false>);
unsigned SectionSize = Is64 ? sizeof(MachOFormat::Section<true>) :
sizeof(MachOFormat::Section<false>);
uintptr_t SectionAddr = CommandAddr + SegmentLoadSize + DRI.d.b * SectionSize;
return reinterpret_cast<const MachOFormat::SectionBase*>(SectionAddr);
}
const MachOFormat::Section<true> *
MachOObjectFile::getSection64(DataRefImpl DRI) const {
assert(is64Bit());
const MachOFormat::LoadCommand *Command = getLoadCommandInfo(DRI.d.a);
uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(Command);
uintptr_t SectionAddr = CommandAddr + sizeof(macho::Segment64LoadCommand) +
DRI.d.b * sizeof(MachOFormat::Section<true>);
return reinterpret_cast<const MachOFormat::Section<true>*>(SectionAddr);
const MachOFormat::SectionBase *Addr = getSectionBase(DRI);
return reinterpret_cast<const MachOFormat::Section<true>*>(Addr);
}
static StringRef parseSegmentOrSectionName(const char *P) {
@ -542,13 +552,8 @@ static StringRef parseSegmentOrSectionName(const char *P) {
}
ArrayRef<char> MachOObjectFile::getSectionRawName(DataRefImpl DRI) const {
if (is64Bit()) {
const MachOFormat::Section<true> *sec = getSection64(DRI);
return ArrayRef<char>(sec->Name);
} else {
const MachOFormat::Section<false> *sec = getSection(DRI);
return ArrayRef<char>(sec->Name);
}
const MachOFormat::SectionBase *Base = getSectionBase(DRI);
return ArrayRef<char>(Base->Name);
}
error_code MachOObjectFile::getSectionName(DataRefImpl DRI,
@ -560,13 +565,8 @@ error_code MachOObjectFile::getSectionName(DataRefImpl DRI,
ArrayRef<char>
MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
if (is64Bit()) {
const MachOFormat::Section<true> *sec = getSection64(Sec);
return ArrayRef<char>(sec->SegmentName, 16);
} else {
const MachOFormat::Section<false> *sec = getSection(Sec);
return ArrayRef<char>(sec->SegmentName);
}
const MachOFormat::SectionBase *Base = getSectionBase(Sec);
return ArrayRef<char>(Base->SegmentName);
}
StringRef MachOObjectFile::getSectionFinalSegmentName(DataRefImpl DRI) const {