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[llvm-objdump] Print the call target next to the instruction

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GNU binutils provides this behavior.  objdump -r doesn't really help
when you aren't dealing with relocation object files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241631 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2015-07-07 22:06:59 +00:00
parent dd5fd545b1
commit b99ee32499
2 changed files with 47 additions and 11 deletions
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36
tools/llvm-objdump/llvm-objdump.cpp
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@ -808,6 +808,27 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
SectionRelocMap[*Sec2].push_back(Section);
}
// Create a mapping from virtual address to symbol name. This is used to
// pretty print the target of a call.
std::vector<std::pair<uint64_t, StringRef>> AllSymbols;
if (MIA) {
for (const SymbolRef &Symbol : Obj->symbols()) {
ErrorOr<uint64_t> AddressOrErr = Symbol.getAddress();
if (error(AddressOrErr.getError()))
break;
uint64_t Address = *AddressOrErr;
ErrorOr<StringRef> Name = Symbol.getName();
if (error(Name.getError()))
break;
if (Name->empty())
continue;
AllSymbols.push_back(std::make_pair(Address, *Name));
}
array_pod_sort(AllSymbols.begin(), AllSymbols.end());
}
for (const SectionRef &Section : Obj->sections()) {
if (!Section.isText() || Section.isVirtual())
continue;
@ -912,6 +933,21 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
SectionAddr + Index, outs(), "", *STI);
outs() << CommentStream.str();
Comments.clear();
if (MIA && (MIA->isCall(Inst) || MIA->isUnconditionalBranch(Inst))) {
uint64_t Target;
if (MIA->evaluateBranch(Inst, SectionAddr + Index, Size, Target)) {
const auto &TargetSym =
std::lower_bound(AllSymbols.begin(), AllSymbols.end(),
std::make_pair(Target, StringRef()));
if (TargetSym != AllSymbols.end()) {
outs() << " <" << TargetSym->second;
uint64_t Disp = TargetSym->first - Target;
if (Disp)
outs() << '-' << Disp;
outs() << '>';
}
}
}
outs() << "\n";
} else {
errs() << ToolName << ": warning: invalid instruction encoding\n";