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Add 179294 back, but don't use bit fields so that it works on big endian hosts.

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Original message:

Print more information about relocations.

With this patch llvm-readobj now prints if a relocation is pcrel, its length,
if it is extern and if it is scattered.

It also refactors the code a bit to use bit fields instead of shifts and
masks all over the place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179345 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2013-04-12 00:17:33 +00:00
parent 33c55bdfed
commit e292347503
5 changed files with 151 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
lib/Object/MachOObjectFile.cpp
View File

@ -80,6 +80,46 @@ StringRef MachOObjectFileBase::getData(size_t Offset, size_t Size) const {
return ObjectFile::getData().substr(Offset, Size);
}
const MachOObjectFileBase::RelocationEntry *
MachOObjectFileBase::getRelocation(DataRefImpl Rel) const {
if (const MachOObjectFile32Le *O = dyn_cast<MachOObjectFile32Le>(this))
return O->getRelocation(Rel);
const MachOObjectFile64Le *O = dyn_cast<MachOObjectFile64Le>(this);
return O->getRelocation(Rel);
}
bool MachOObjectFileBase::isScattered(const RelocationEntry *RE) const {
unsigned Arch = getArch();
return (Arch != Triple::x86_64) && (RE->Address & macho::RF_Scattered);
}
bool MachOObjectFileBase::isPCRel(const RelocationEntry *RE) const {
if (isScattered(RE)) {
const ScatteredRelocationEntry *SRE =
reinterpret_cast<const ScatteredRelocationEntry *>(RE);
return SRE->getPCRel();
}
return RE->getPCRel();
}
unsigned MachOObjectFileBase::getLength(const RelocationEntry *RE) const {
if (isScattered(RE)) {
const ScatteredRelocationEntry *SRE =
reinterpret_cast<const ScatteredRelocationEntry *>(RE);
return SRE->getLength();
}
return RE->getLength();
}
unsigned MachOObjectFileBase::getType(const RelocationEntry *RE) const {
if (isScattered(RE)) {
const ScatteredRelocationEntry *SRE =
reinterpret_cast<const ScatteredRelocationEntry *>(RE);
return SRE->getType();
}
return RE->getType();
}
ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
StringRef Magic = Buffer->getBuffer().slice(0, 4);
error_code ec;
@ -435,16 +475,12 @@ void advanceTo(T &it, size_t Val) {
void
MachOObjectFileBase::printRelocationTargetName(const RelocationEntry *RE,
raw_string_ostream &fmt) const {
unsigned Arch = getArch();
bool isScattered = (Arch != Triple::x86_64) &&
(RE->Word0 & macho::RF_Scattered);
// Target of a scattered relocation is an address. In the interest of
// generating pretty output, scan through the symbol table looking for a
// symbol that aligns with that address. If we find one, print it.
// Otherwise, we just print the hex address of the target.
if (isScattered) {
uint32_t Val = RE->Word1;
if (isScattered(RE)) {
uint32_t Val = RE->SymbolNum;
error_code ec;
for (symbol_iterator SI = begin_symbols(), SE = end_symbols(); SI != SE;
@ -486,8 +522,8 @@ MachOObjectFileBase::printRelocationTargetName(const RelocationEntry *RE,
}
StringRef S;
bool isExtern = (RE->Word1 >> 27) & 1;
uint32_t Val = RE->Word1 & 0xFFFFFF;
bool isExtern = RE->getExternal();
uint32_t Val = RE->Address;
if (isExtern) {
symbol_iterator SI = begin_symbols();