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llvm-objdump: Add static symbol table dumping.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142404 91177308-0d34-0410-b5e6-96231b3b80d8
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@Bigcheese
Bigcheese committed Oct 18, 2011
1 parent 5e3a082 commit 22ff0f3
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Showing 2 changed files with 122 additions and 5 deletions.
6 changes: 2 additions & 4 deletions test/Object/objdump-symbol-table.test
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,7 @@ RUN: | FileCheck %s -check-prefix COFF-i386
RUN: llvm-objdump -t %p/TestObjectFiles/trivial-object-test.elf-i386 \
RUN: | FileCheck %s -check-prefix ELF-i386

XFAIL: *

COFF-i386: trivial-object-test.coff-i386: file format pe-i386
COFF-i386: trivial-object-test.coff-i386: file format
COFF-i386: SYMBOL TABLE:
COFF-i386: [ 0](sec 1)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .text
COFF-i386: AUX scnlen 0x24 nreloc 3 nlnno 0 checksum 0x0 assoc 1 comdat 0
Expand All @@ -16,7 +14,7 @@ COFF-i386: [ 5](sec 2)(fl 0x00)(ty 0)(scl 3) (nx 0) 0x00000000 L_.str
COFF-i386: [ 6](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 _puts
COFF-i386: [ 7](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 _SomeOtherFunction

ELF-i386: trivial-object-test.elf-i386: file format elf32-i386
ELF-i386: trivial-object-test.elf-i386: file format
ELF-i386: SYMBOL TABLE:
ELF-i386: 00000000 l df *ABS* 00000000 trivial-object-test.s
ELF-i386: 00000000 l d .text 00000000 .text
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121 changes: 120 additions & 1 deletion tools/llvm-objdump/llvm-objdump.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#include "llvm-objdump.h"
#include "MCFunction.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringExtras.h"
Expand Down Expand Up @@ -64,6 +65,9 @@ Relocations("r", cl::desc("Display the relocation entries in the file"));
static cl::opt<bool>
SectionContents("s", cl::desc("Display the content of each section"));

static cl::opt<bool>
SymbolTable("t", cl::desc("Display the symbol table"));

static cl::opt<bool>
MachO("macho", cl::desc("Use MachO specific object file parser"));
static cl::alias
Expand Down Expand Up @@ -411,6 +415,115 @@ static void PrintSectionContents(const ObjectFile *o) {
}
}

static void PrintCOFFSymbolTable(const COFFObjectFile *coff) {
const coff_file_header *header;
if (error(coff->getHeader(header))) return;
int aux_count = 0;
const coff_symbol *symbol = 0;
for (int i = 0, e = header->NumberOfSymbols; i != e; ++i) {
if (aux_count--) {
// Figure out which type of aux this is.
if (symbol->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
&& symbol->Value == 0) { // Section definition.
const coff_aux_section_definition *asd;
if (error(coff->getAuxSymbol<coff_aux_section_definition>(i, asd)))
return;
outs() << "AUX "
<< format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
, unsigned(asd->Length)
, unsigned(asd->NumberOfRelocations)
, unsigned(asd->NumberOfLinenumbers)
, unsigned(asd->CheckSum))
<< format("assoc %d comdat %d\n"
, unsigned(asd->Number)
, unsigned(asd->Selection));
} else {
outs() << "AUX Unknown\n";
}
} else {
StringRef name;
if (error(coff->getSymbol(i, symbol))) return;
if (error(coff->getSymbolName(symbol, name))) return;
outs() << "[" << format("%2d", i) << "]"
<< "(sec " << format("%2d", int(symbol->SectionNumber)) << ")"
<< "(fl 0x00)" // Flag bits, which COFF doesn't have.
<< "(ty " << format("%3x", unsigned(symbol->Type)) << ")"
<< "(scl " << format("%3x", unsigned(symbol->StorageClass)) << ") "
<< "(nx " << unsigned(symbol->NumberOfAuxSymbols) << ") "
<< "0x" << format("%08x", unsigned(symbol->Value)) << " "
<< name << "\n";
aux_count = symbol->NumberOfAuxSymbols;
}
}
}

static void PrintSymbolTable(const ObjectFile *o) {
outs() << "SYMBOL TABLE:\n";

if (const COFFObjectFile *coff = dyn_cast<const COFFObjectFile>(o))
PrintCOFFSymbolTable(coff);
else {
error_code ec;
for (symbol_iterator si = o->begin_symbols(),
se = o->end_symbols(); si != se; si.increment(ec)) {
if (error(ec)) return;
StringRef Name;
uint64_t Offset;
bool Global;
SymbolRef::Type Type;
bool Weak;
bool Absolute;
uint64_t Size;
section_iterator Section = o->end_sections();
if (error(si->getName(Name))) continue;
if (error(si->getOffset(Offset))) continue;
if (error(si->isGlobal(Global))) continue;
if (error(si->getType(Type))) continue;
if (error(si->isWeak(Weak))) continue;
if (error(si->isAbsolute(Absolute))) continue;
if (error(si->getSize(Size))) continue;
if (error(si->getSection(Section))) continue;

if (Offset == UnknownAddressOrSize)
Offset = 0;
char GlobLoc = ' ';
if (Type != SymbolRef::ST_External)
GlobLoc = Global ? 'g' : 'l';
char Debug = (Type == SymbolRef::ST_Debug || Type == SymbolRef::ST_File)
? 'd' : ' ';
char FileFunc = ' ';
if (Type == SymbolRef::ST_File)
FileFunc = 'f';
else if (Type == SymbolRef::ST_Function)
FileFunc = 'F';

outs() << format("%08x", Offset) << " "
<< GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' '
<< (Weak ? 'w' : ' ') // Weak?
<< ' ' // Constructor. Not supported yet.
<< ' ' // Warning. Not supported yet.
<< ' ' // Indirect reference to another symbol.
<< Debug // Debugging (d) or dynamic (D) symbol.
<< FileFunc // Name of function (F), file (f) or object (O).
<< ' ';
if (Absolute)
outs() << "*ABS*";
else if (Section == o->end_sections())
outs() << "*UND*";
else {
StringRef SectionName;
if (error(Section->getName(SectionName)))
SectionName = "";
outs() << SectionName;
}
outs() << '\t'
<< format("%08x ", Size)
<< Name
<< '\n';
}
}
}

static void DumpObject(const ObjectFile *o) {
outs() << '\n';
outs() << o->getFileName()
Expand All @@ -424,6 +537,8 @@ static void DumpObject(const ObjectFile *o) {
PrintSectionHeaders(o);
if (SectionContents)
PrintSectionContents(o);
if (SymbolTable)
PrintSymbolTable(o);
}

/// @brief Dump each object file in \a a;
Expand Down Expand Up @@ -494,7 +609,11 @@ int main(int argc, char **argv) {
if (InputFilenames.size() == 0)
InputFilenames.push_back("a.out");

if (!Disassemble && !Relocations && !SectionHeaders && !SectionContents) {
if (!Disassemble
&& !Relocations
&& !SectionHeaders
&& !SectionContents
&& !SymbolTable) {
cl::PrintHelpMessage();
return 2;
}
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