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Support reading GNU symbol versions in ELFObjectFile

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* Add enums and structures for GNU version information.
* Implement extraction of that information on a per-symbol basis (ELFObjectFile::getSymbolVersion).
* Implement a generic interface, GetELFSymbolVersion(), for getting the symbol version from the ObjectFile (hides the templating).
* Have llvm-readobj print out the version, when available.
* Add a test for the new feature: readobj-elf-versioning.test



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152436 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Meyer
2012-03-09 20:59:52 +00:00
parent 6f9489a86f
commit 2d70e263c2
8 changed files with 470 additions and 19 deletions
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34
tools/llvm-readobj/llvm-readobj.cpp
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@@ -17,6 +17,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/ELF.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Format.h"
@@ -78,22 +79,35 @@ std::string GetFlagStr(uint32_t Flags) {
return result;
}
void DumpSymbol(const SymbolRef &sym) {
void DumpSymbol(const SymbolRef &Sym, const ObjectFile *obj, bool IsDynamic) {
StringRef Name;
SymbolRef::Type Type;
uint32_t Flags;
uint64_t Address;
uint64_t Size;
uint64_t FileOffset;
sym.getName(Name);
sym.getAddress(Address);
sym.getSize(Size);
sym.getFileOffset(FileOffset);
sym.getType(Type);
sym.getFlags(Flags);
Sym.getName(Name);
Sym.getAddress(Address);
Sym.getSize(Size);
Sym.getFileOffset(FileOffset);
Sym.getType(Type);
Sym.getFlags(Flags);
std::string FullName = Name;
// If this is a dynamic symbol from an ELF object, append
// the symbol's version to the name.
if (IsDynamic && obj->isELF()) {
StringRef Version;
bool IsDefault;
GetELFSymbolVersion(obj, Sym, Version, IsDefault);
if (!Version.empty()) {
FullName += (IsDefault ? "@@" : "@");
FullName += Version;
}
}
// format() can't handle StringRefs
outs() << format(" %-32s", Name.str().c_str())
outs() << format(" %-32s", FullName.c_str())
<< format(" %-4s", GetTypeStr(Type))
<< format(" %16"PRIx64, Address)
<< format(" %16"PRIx64, Size)
@@ -111,7 +125,7 @@ void DumpSymbols(const ObjectFile *obj) {
symbol_iterator it = obj->begin_symbols();
symbol_iterator ie = obj->end_symbols();
while (it != ie) {
DumpSymbol(*it);
DumpSymbol(*it, obj, false);
it.increment(ec);
if (ec)
report_fatal_error("Symbol iteration failed");
@@ -128,7 +142,7 @@ void DumpDynamicSymbols(const ObjectFile *obj) {
symbol_iterator it = obj->begin_dynamic_symbols();
symbol_iterator ie = obj->end_dynamic_symbols();
while (it != ie) {
DumpSymbol(*it);
DumpSymbol(*it, obj, true);
it.increment(ec);
if (ec)
report_fatal_error("Symbol iteration failed");