// dumps out a plethora of information about an object file depending on the
// flags.
//
+// The flags and output of this program should be near identical to those of
+// binutils objdump.
+//
//===----------------------------------------------------------------------===//
#include "llvm-objdump.h"
-#include "MCFunction.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCAtom.h"
+#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
+#include "llvm/MC/MCFunction.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCInstrAnalysis.h"
#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCModule.h"
+#include "llvm/MC/MCObjectDisassembler.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectSymbolizer.h"
#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCRelocationInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFF.h"
-#include "llvm/Object/ELF.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Casting.h"
PrivateHeadersShort("p", cl::desc("Alias for --private-headers"),
cl::aliasopt(PrivateHeaders));
+static cl::opt<bool>
+Symbolize("symbolize", cl::desc("When disassembling instructions, "
+ "try to symbolize operands."));
+
+static cl::opt<bool>
+CFG("cfg", cl::desc("Create a CFG for every function found in the object"
+ " and write it to a graphviz file"));
+
static StringRef ToolName;
bool llvm::error(error_code ec) {
// Figure out the target triple.
llvm::Triple TheTriple("unknown-unknown-unknown");
if (TripleName.empty()) {
- if (Obj)
+ if (Obj) {
TheTriple.setArch(Triple::ArchType(Obj->getArch()));
+ // TheTriple defaults to ELF, and COFF doesn't have an environment:
+ // the best we can do here is indicate that it is mach-o.
+ if (Obj->isMachO())
+ TheTriple.setEnvironment(Triple::MachO);
+ }
} else
TheTriple.setTriple(Triple::normalize(TripleName));
return TheTarget;
}
-void llvm::StringRefMemoryObject::anchor() { }
+// Write a graphviz file for the CFG inside an MCFunction.
+static void emitDOTFile(const char *FileName, const MCFunction &f,
+ MCInstPrinter *IP) {
+ // Start a new dot file.
+ std::string Error;
+ raw_fd_ostream Out(FileName, Error);
+ if (!Error.empty()) {
+ errs() << "llvm-objdump: warning: " << Error << '\n';
+ return;
+ }
+
+ Out << "digraph \"" << f.getName() << "\" {\n";
+ Out << "graph [ rankdir = \"LR\" ];\n";
+ for (MCFunction::const_iterator i = f.begin(), e = f.end(); i != e; ++i) {
+ // Only print blocks that have predecessors.
+ bool hasPreds = (*i)->pred_begin() != (*i)->pred_end();
+
+ if (!hasPreds && i != f.begin())
+ continue;
+
+ Out << '"' << (*i)->getInsts()->getBeginAddr() << "\" [ label=\"<a>";
+ // Print instructions.
+ for (unsigned ii = 0, ie = (*i)->getInsts()->size(); ii != ie;
+ ++ii) {
+ if (ii != 0) // Not the first line, start a new row.
+ Out << '|';
+ if (ii + 1 == ie) // Last line, add an end id.
+ Out << "<o>";
+
+ // Escape special chars and print the instruction in mnemonic form.
+ std::string Str;
+ raw_string_ostream OS(Str);
+ IP->printInst(&(*i)->getInsts()->at(ii).Inst, OS, "");
+ Out << DOT::EscapeString(OS.str());
+ }
+ Out << "\" shape=\"record\" ];\n";
+
+ // Add edges.
+ for (MCBasicBlock::succ_const_iterator si = (*i)->succ_begin(),
+ se = (*i)->succ_end(); si != se; ++si)
+ Out << (*i)->getInsts()->getBeginAddr() << ":o -> "
+ << (*si)->getInsts()->getBeginAddr() << ":a\n";
+ }
+ Out << "}\n";
+}
void llvm::DumpBytes(StringRef bytes) {
static const char hex_rep[] = "0123456789abcdef";
bool llvm::RelocAddressLess(RelocationRef a, RelocationRef b) {
uint64_t a_addr, b_addr;
- if (error(a.getAddress(a_addr))) return false;
- if (error(b.getAddress(b_addr))) return false;
+ if (error(a.getOffset(a_addr))) return false;
+ if (error(b.getOffset(b_addr))) return false;
return a_addr < b_addr;
}
FeaturesStr = Features.getString();
}
+ OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
+ if (!MRI) {
+ errs() << "error: no register info for target " << TripleName << "\n";
+ return;
+ }
+
+ // Set up disassembler.
+ OwningPtr<const MCAsmInfo> AsmInfo(
+ TheTarget->createMCAsmInfo(*MRI, TripleName));
+ if (!AsmInfo) {
+ errs() << "error: no assembly info for target " << TripleName << "\n";
+ return;
+ }
+
+ OwningPtr<const MCSubtargetInfo> STI(
+ TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr));
+ if (!STI) {
+ errs() << "error: no subtarget info for target " << TripleName << "\n";
+ return;
+ }
+
+ OwningPtr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
+ if (!MII) {
+ errs() << "error: no instruction info for target " << TripleName << "\n";
+ return;
+ }
+
+ OwningPtr<MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI));
+ if (!DisAsm) {
+ errs() << "error: no disassembler for target " << TripleName << "\n";
+ return;
+ }
+
+ OwningPtr<const MCObjectFileInfo> MOFI;
+ OwningPtr<MCContext> Ctx;
+
+ if (Symbolize) {
+ MOFI.reset(new MCObjectFileInfo);
+ Ctx.reset(new MCContext(AsmInfo.get(), MRI.get(), MOFI.get()));
+ OwningPtr<MCRelocationInfo> RelInfo(
+ TheTarget->createMCRelocationInfo(TripleName, *Ctx.get()));
+ if (RelInfo) {
+ OwningPtr<MCSymbolizer> Symzer(
+ MCObjectSymbolizer::createObjectSymbolizer(*Ctx.get(), RelInfo, Obj));
+ if (Symzer)
+ DisAsm->setSymbolizer(Symzer);
+ }
+ }
+
+ OwningPtr<const MCInstrAnalysis>
+ MIA(TheTarget->createMCInstrAnalysis(MII.get()));
+
+ int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
+ OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
+ AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI));
+ if (!IP) {
+ errs() << "error: no instruction printer for target " << TripleName
+ << '\n';
+ return;
+ }
+
+ if (CFG) {
+ OwningPtr<MCObjectDisassembler> OD(
+ new MCObjectDisassembler(*Obj, *DisAsm, *MIA));
+ OwningPtr<MCModule> Mod(OD->buildModule(/* withCFG */ true));
+ for (MCModule::const_atom_iterator AI = Mod->atom_begin(),
+ AE = Mod->atom_end();
+ AI != AE; ++AI) {
+ outs() << "Atom " << (*AI)->getName() << ": \n";
+ if (const MCTextAtom *TA = dyn_cast<MCTextAtom>(*AI)) {
+ for (MCTextAtom::const_iterator II = TA->begin(), IE = TA->end();
+ II != IE;
+ ++II) {
+ IP->printInst(&II->Inst, outs(), "");
+ outs() << "\n";
+ }
+ }
+ }
+ for (MCModule::const_func_iterator FI = Mod->func_begin(),
+ FE = Mod->func_end();
+ FI != FE; ++FI) {
+ static int filenum = 0;
+ emitDOTFile((Twine((*FI)->getName()) + "_" +
+ utostr(filenum) + ".dot").str().c_str(),
+ **FI, IP.get());
+ ++filenum;
+ }
+ }
+
+
error_code ec;
for (section_iterator i = Obj->begin_sections(),
e = Obj->end_sections();
if (!error(i->containsSymbol(*si, contains)) && contains) {
uint64_t Address;
if (error(si->getAddress(Address))) break;
+ if (Address == UnknownAddressOrSize) continue;
Address -= SectionAddr;
StringRef Name;
std::sort(Rels.begin(), Rels.end(), RelocAddressLess);
StringRef SegmentName = "";
- if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(Obj)) {
+ if (const MachOObjectFile *MachO =
+ dyn_cast<const MachOObjectFile>(Obj)) {
DataRefImpl DR = i->getRawDataRefImpl();
- if (error(MachO->getSectionFinalSegmentName(DR, SegmentName)))
- break;
+ SegmentName = MachO->getSectionFinalSegmentName(DR);
}
StringRef name;
if (error(i->getName(name))) break;
if (Symbols.empty())
Symbols.push_back(std::make_pair(0, name));
- // Set up disassembler.
- OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
- if (!AsmInfo) {
- errs() << "error: no assembly info for target " << TripleName << "\n";
- return;
- }
-
- OwningPtr<const MCSubtargetInfo> STI(
- TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr));
-
- if (!STI) {
- errs() << "error: no subtarget info for target " << TripleName << "\n";
- return;
- }
-
- OwningPtr<const MCDisassembler> DisAsm(
- TheTarget->createMCDisassembler(*STI));
- if (!DisAsm) {
- errs() << "error: no disassembler for target " << TripleName << "\n";
- return;
- }
-
- OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
- if (!MRI) {
- errs() << "error: no register info for target " << TripleName << "\n";
- return;
- }
-
- OwningPtr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
- if (!MII) {
- errs() << "error: no instruction info for target " << TripleName << "\n";
- return;
- }
-
- int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
- OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
- AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI));
- if (!IP) {
- errs() << "error: no instruction printer for target " << TripleName
- << '\n';
- return;
- }
+ SmallString<40> Comments;
+ raw_svector_ostream CommentStream(Comments);
StringRef Bytes;
if (error(i->getContents(Bytes))) break;
- StringRefMemoryObject memoryObject(Bytes);
+ StringRefMemoryObject memoryObject(Bytes, SectionAddr);
uint64_t Size;
uint64_t Index;
uint64_t SectSize;
for (Index = Start; Index < End; Index += Size) {
MCInst Inst;
- if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
- DebugOut, nulls())) {
+ if (DisAsm->getInstruction(Inst, Size, memoryObject,
+ SectionAddr + Index,
+ DebugOut, CommentStream)) {
outs() << format("%8" PRIx64 ":", SectionAddr + Index);
if (!NoShowRawInsn) {
outs() << "\t";
DumpBytes(StringRef(Bytes.data() + Index, Size));
}
IP->printInst(&Inst, outs(), "");
+ outs() << CommentStream.str();
+ Comments.clear();
outs() << "\n";
} else {
errs() << ToolName << ": warning: invalid instruction encoding\n";
if (error(rel_cur->getHidden(hidden))) goto skip_print_rel;
if (hidden) goto skip_print_rel;
- if (error(rel_cur->getAddress(addr))) goto skip_print_rel;
+ if (error(rel_cur->getOffset(addr))) goto skip_print_rel;
// Stop when rel_cur's address is past the current instruction.
if (addr >= Index + Size) break;
if (error(rel_cur->getTypeName(name))) goto skip_print_rel;
if (error(ri->getHidden(hidden))) continue;
if (hidden) continue;
if (error(ri->getTypeName(relocname))) continue;
- if (error(ri->getAddress(address))) continue;
+ if (error(ri->getOffset(address))) continue;
if (error(ri->getValueString(valuestr))) continue;
outs() << address << " " << relocname << " " << valuestr << "\n";
}
if (error(si->isBSS(BSS))) return;
std::string Type = (std::string(Text ? "TEXT " : "") +
(Data ? "DATA " : "") + (BSS ? "BSS" : ""));
- outs() << format("%3d %-13s %09" PRIx64 " %017" PRIx64 " %s\n",
+ outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %s\n",
i, Name.str().c_str(), Size, Address, Type.c_str());
++i;
}
StringRef Name;
StringRef Contents;
uint64_t BaseAddr;
+ bool BSS;
if (error(si->getName(Name))) continue;
if (error(si->getContents(Contents))) continue;
if (error(si->getAddress(BaseAddr))) continue;
+ if (error(si->isBSS(BSS))) continue;
outs() << "Contents of section " << Name << ":\n";
+ if (BSS) {
+ outs() << format("<skipping contents of bss section at [%04" PRIx64
+ ", %04" PRIx64 ")>\n", BaseAddr,
+ BaseAddr + Contents.size());
+ continue;
+ }
// Dump out the content as hex and printable ascii characters.
for (std::size_t addr = 0, end = Contents.size(); addr < end; addr += 16) {
// Print ascii.
outs() << " ";
for (std::size_t i = 0; i < 16 && addr + i < end; ++i) {
- if (std::isprint(Contents[addr + i] & 0xFF))
+ if (std::isprint(static_cast<unsigned char>(Contents[addr + i]) & 0xFF))
outs() << Contents[addr + i];
else
outs() << ".";
else if (Type == SymbolRef::ST_Function)
FileFunc = 'F';
- outs() << format("%08" PRIx64, Address) << " "
+ const char *Fmt = o->getBytesInAddress() > 4 ? "%016" PRIx64 :
+ "%08" PRIx64;
+
+ outs() << format(Fmt, Address) << " "
<< GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' '
<< (Weak ? 'w' : ' ') // Weak?
<< ' ' // Constructor. Not supported yet.
else if (Section == o->end_sections())
outs() << "*UND*";
else {
- if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(o)) {
- StringRef SegmentName;
+ if (const MachOObjectFile *MachO =
+ dyn_cast<const MachOObjectFile>(o)) {
DataRefImpl DR = Section->getRawDataRefImpl();
- if (error(MachO->getSectionFinalSegmentName(DR, SegmentName)))
- SegmentName = "";
+ StringRef SegmentName = MachO->getSectionFinalSegmentName(DR);
outs() << SegmentName << ",";
}
StringRef SectionName;
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