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authorBenjamin Kramer <benny.kra@googlemail.com>2011-07-15 18:39:24 +0000
committerBenjamin Kramer <benny.kra@googlemail.com>2011-07-15 18:39:24 +0000
commit739b65bf85cf7221b8a615e83dee11ec729e2649 (patch)
tree451ee518eed429563adacdd014534481612db042 /tools/llvm-objdump
parent07ea23aa2d17f701fa125442c20c1eba75b55fdb (diff)
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Teach llvm-objdump to disassemble sections symbol by symbol.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135289 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-objdump')
-rw-r--r--tools/llvm-objdump/llvm-objdump.cpp79
1 files changed, 56 insertions, 23 deletions
diff --git a/tools/llvm-objdump/llvm-objdump.cpp b/tools/llvm-objdump/llvm-objdump.cpp
index b47c04e..4079e4a 100644
--- a/tools/llvm-objdump/llvm-objdump.cpp
+++ b/tools/llvm-objdump/llvm-objdump.cpp
@@ -16,6 +16,7 @@
#include "llvm/Object/ObjectFile.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
@@ -158,7 +159,7 @@ static void DisassembleInput(const StringRef &Filename) {
outs() << '\n';
outs() << Filename
- << ":\tfile format " << Obj->getFileFormatName() << "\n\n\n";
+ << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
error_code ec;
for (ObjectFile::section_iterator i = Obj->begin_sections(),
@@ -169,9 +170,32 @@ static void DisassembleInput(const StringRef &Filename) {
if (error(i->isText(text))) break;
if (!text) continue;
+ // Make a list of all the symbols in this section.
+ std::vector<std::pair<uint64_t, StringRef> > Symbols;
+ for (ObjectFile::symbol_iterator si = Obj->begin_symbols(),
+ se = Obj->end_symbols();
+ si != se; si.increment(ec)) {
+ bool contains;
+ if (!error(i->containsSymbol(*si, contains)) && contains) {
+ uint64_t Address;
+ if (error(si->getAddress(Address))) break;
+ StringRef Name;
+ if (error(si->getName(Name))) break;
+ Symbols.push_back(std::make_pair(Address, Name));
+ }
+ }
+
+ // Sort the symbols by address, just in case they didn't come in that way.
+ array_pod_sort(Symbols.begin(), Symbols.end());
+
StringRef name;
if (error(i->getName(name))) break;
- outs() << "Disassembly of section " << name << ":\n\n";
+ outs() << "Disassembly of section " << name << ':';
+
+ // If the section has no symbols just insert a dummy one and disassemble
+ // the whole section.
+ if (Symbols.empty())
+ Symbols.push_back(std::make_pair(0, name));
// Set up disassembler.
OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
@@ -200,27 +224,36 @@ static void DisassembleInput(const StringRef &Filename) {
StringRefMemoryObject memoryObject(Bytes);
uint64_t Size;
uint64_t Index;
-
- for (Index = 0; Index < Bytes.size(); Index += Size) {
- MCInst Inst;
-
-# ifndef NDEBUG
- raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
-# else
- raw_ostream &DebugOut = nulls();
-# endif
-
- if (DisAsm->getInstruction(Inst, Size, memoryObject, Index, DebugOut)) {
- uint64_t addr;
- if (error(i->getAddress(addr))) break;
- outs() << format("%8x:\t", addr + Index);
- DumpBytes(StringRef(Bytes.data() + Index, Size));
- IP->printInst(&Inst, outs());
- outs() << "\n";
- } else {
- errs() << ToolName << ": warning: invalid instruction encoding\n";
- if (Size == 0)
- Size = 1; // skip illegible bytes
+ uint64_t SectSize;
+ if (error(i->getSize(SectSize))) break;
+
+ // Disassemble symbol by symbol.
+ for (unsigned si = 0, se = Symbols.size(); si != se; ++si) {
+ uint64_t Start = Symbols[si].first;
+ uint64_t End = si == se-1 ? SectSize : Symbols[si + 1].first - 1;
+ outs() << '\n' << Symbols[si].second << ":\n";
+
+ for (Index = Start; Index < End; Index += Size) {
+ MCInst Inst;
+
+#ifndef NDEBUG
+ raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
+#else
+ raw_ostream &DebugOut = nulls();
+#endif
+
+ if (DisAsm->getInstruction(Inst, Size, memoryObject, Index, DebugOut)) {
+ uint64_t addr;
+ if (error(i->getAddress(addr))) break;
+ outs() << format("%8x:\t", addr + Index);
+ DumpBytes(StringRef(Bytes.data() + Index, Size));
+ IP->printInst(&Inst, outs());
+ outs() << "\n";
+ } else {
+ errs() << ToolName << ": warning: invalid instruction encoding\n";
+ if (Size == 0)
+ Size = 1; // skip illegible bytes
+ }
}
}
}