llvm-6502/tools/llvm-readobj/llvm-readobj.cpp

289 lines
9.2 KiB
C++
Raw Normal View History

//===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is a tool similar to readelf, except it works on multiple object file
// formats. The main purpose of this tool is to provide detailed output suitable
// for FileCheck.
//
// Flags should be similar to readelf where supported, but the output format
// does not need to be identical. The point is to not make users learn yet
// another set of flags.
//
// Output should be specialized for each format where appropriate.
//
//===----------------------------------------------------------------------===//
#include "llvm-readobj.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Object/ELF.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
using namespace llvm;
using namespace llvm::object;
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input object>"), cl::init(""));
static void dumpSymbolHeader() {
outs() << format(" %-32s", (const char *)"Name")
<< format(" %-4s", (const char *)"Type")
<< format(" %-4s", (const char *)"Section")
<< format(" %-16s", (const char *)"Address")
<< format(" %-16s", (const char *)"Size")
<< format(" %-16s", (const char *)"FileOffset")
<< format(" %-26s", (const char *)"Flags") << "\n";
}
static void dumpSectionHeader() {
outs() << format(" %-24s", (const char*)"Name")
<< format(" %-16s", (const char*)"Address")
<< format(" %-16s", (const char*)"Size")
<< format(" %-8s", (const char*)"Align")
<< format(" %-26s", (const char*)"Flags")
<< "\n";
}
static const char *getTypeStr(SymbolRef::Type Type) {
switch (Type) {
case SymbolRef::ST_Unknown: return "?";
case SymbolRef::ST_Data: return "DATA";
case SymbolRef::ST_Debug: return "DBG";
case SymbolRef::ST_File: return "FILE";
case SymbolRef::ST_Function: return "FUNC";
case SymbolRef::ST_Other: return "-";
}
return "INV";
}
static std::string getSymbolFlagStr(uint32_t Flags) {
std::string result;
if (Flags & SymbolRef::SF_Undefined)
result += "undef,";
if (Flags & SymbolRef::SF_Global)
result += "global,";
if (Flags & SymbolRef::SF_Weak)
result += "weak,";
if (Flags & SymbolRef::SF_Absolute)
result += "absolute,";
if (Flags & SymbolRef::SF_ThreadLocal)
result += "threadlocal,";
if (Flags & SymbolRef::SF_Common)
result += "common,";
if (Flags & SymbolRef::SF_FormatSpecific)
result += "formatspecific,";
// Remove trailing comma
if (result.size() > 0) {
result.erase(result.size() - 1);
}
return result;
}
static void checkError(error_code ec, const char *msg) {
if (ec)
report_fatal_error(std::string(msg) + ": " + ec.message());
}
static std::string getSectionFlagStr(const SectionRef &Section) {
const struct {
error_code (SectionRef::*MemF)(bool &) const;
const char *FlagStr, *ErrorStr;
} Work[] =
{{ &SectionRef::isText, "text,", "Section.isText() failed" },
{ &SectionRef::isData, "data,", "Section.isData() failed" },
{ &SectionRef::isBSS, "bss,", "Section.isBSS() failed" },
{ &SectionRef::isRequiredForExecution, "required,",
"Section.isRequiredForExecution() failed" },
{ &SectionRef::isVirtual, "virtual,", "Section.isVirtual() failed" },
{ &SectionRef::isZeroInit, "zeroinit,", "Section.isZeroInit() failed" },
{ &SectionRef::isReadOnlyData, "rodata,",
"Section.isReadOnlyData() failed" }};
std::string result;
for (uint32_t I = 0; I < sizeof(Work)/sizeof(*Work); ++I) {
bool B;
checkError((Section.*Work[I].MemF)(B), Work[I].ErrorStr);
if (B)
result += Work[I].FlagStr;
}
// Remove trailing comma
if (result.size() > 0) {
result.erase(result.size() - 1);
}
return result;
}
static 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;
checkError(Sym.getName(Name), "SymbolRef.getName() failed");
checkError(Sym.getAddress(Address), "SymbolRef.getAddress() failed");
checkError(Sym.getSize(Size), "SymbolRef.getSize() failed");
checkError(Sym.getFileOffset(FileOffset),
"SymbolRef.getFileOffset() failed");
checkError(Sym.getType(Type), "SymbolRef.getType() failed");
checkError(Sym.getFlags(Flags), "SymbolRef.getFlags() failed");
std::string FullName = Name;
llvm::object::section_iterator symSection(obj->begin_sections());
Sym.getSection(symSection);
StringRef sectionName;
if (symSection != obj->end_sections())
checkError(symSection->getName(sectionName),
"SectionRef::getName() failed");
// 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", FullName.c_str())
<< format(" %-4s", getTypeStr(Type))
<< format(" %-32s", std::string(sectionName).c_str())
<< format(" %16" PRIx64, Address) << format(" %16" PRIx64, Size)
<< format(" %16" PRIx64, FileOffset) << " "
<< getSymbolFlagStr(Flags) << "\n";
}
static void dumpStaticSymbol(const SymbolRef &Sym, const ObjectFile *obj) {
return dumpSymbol(Sym, obj, false);
}
static void dumpDynamicSymbol(const SymbolRef &Sym, const ObjectFile *obj) {
return dumpSymbol(Sym, obj, true);
}
static void dumpSection(const SectionRef &Section, const ObjectFile *obj) {
StringRef Name;
checkError(Section.getName(Name), "SectionRef::getName() failed");
uint64_t Addr, Size, Align;
checkError(Section.getAddress(Addr), "SectionRef::getAddress() failed");
checkError(Section.getSize(Size), "SectionRef::getSize() failed");
checkError(Section.getAlignment(Align), "SectionRef::getAlignment() failed");
outs() << format(" %-24s", std::string(Name).c_str())
<< format(" %16" PRIx64, Addr)
<< format(" %16" PRIx64, Size)
<< format(" %8" PRIx64, Align)
<< " " << getSectionFlagStr(Section)
<< "\n";
}
static void dumpLibrary(const LibraryRef &lib, const ObjectFile *obj) {
StringRef path;
lib.getPath(path);
outs() << " " << path << "\n";
}
template<typename Iterator, typename Func>
static void dump(const ObjectFile *obj, Func f, Iterator begin, Iterator end,
const char *errStr) {
error_code ec;
uint32_t count = 0;
Iterator it = begin, ie = end;
while (it != ie) {
f(*it, obj);
it.increment(ec);
if (ec)
report_fatal_error(errStr);
++count;
}
outs() << " Total: " << count << "\n\n";
}
static void dumpHeaders(const ObjectFile *obj) {
outs() << "File Format : " << obj->getFileFormatName() << "\n";
outs() << "Arch : "
<< Triple::getArchTypeName((llvm::Triple::ArchType)obj->getArch())
<< "\n";
outs() << "Address Size: " << (8*obj->getBytesInAddress()) << " bits\n";
outs() << "Load Name : " << obj->getLoadName() << "\n";
outs() << "\n";
}
int main(int argc, char** argv) {
error_code ec;
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
cl::ParseCommandLineOptions(argc, argv,
"LLVM Object Reader\n");
if (InputFilename.empty()) {
errs() << "Please specify an input filename\n";
return 1;
}
// Open the object file
OwningPtr<MemoryBuffer> File;
if (MemoryBuffer::getFile(InputFilename, File)) {
errs() << InputFilename << ": Open failed\n";
return 1;
}
OwningPtr<ObjectFile> o(ObjectFile::createObjectFile(File.take()));
ObjectFile *obj = o.get();
if (!obj) {
errs() << InputFilename << ": Object type not recognized\n";
}
dumpHeaders(obj);
outs() << "Symbols:\n";
dumpSymbolHeader();
dump(obj, dumpStaticSymbol, obj->begin_symbols(), obj->end_symbols(),
"Symbol iteration failed");
outs() << "Dynamic Symbols:\n";
dumpSymbolHeader();
dump(obj, dumpDynamicSymbol, obj->begin_dynamic_symbols(),
obj->end_dynamic_symbols(), "Symbol iteration failed");
outs() << "Sections:\n";
dumpSectionHeader();
dump(obj, &dumpSection, obj->begin_sections(), obj->end_sections(),
"Section iteration failed");
if (obj->isELF()) {
if (ErrorOr<void> e = dumpELFDynamicTable(obj, outs()))
;
else
errs() << "InputFilename" << ": " << error_code(e).message() << "\n";
}
outs() << "Libraries needed:\n";
dump(obj, &dumpLibrary, obj->begin_libraries_needed(),
obj->end_libraries_needed(), "Needed libraries iteration failed");
return 0;
}