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-rw-r--r--llvm/tools/llvm-objdump/MachODump.cpp135
-rw-r--r--llvm/tools/llvm-objdump/llvm-objdump.cpp3
-rw-r--r--llvm/tools/llvm-objdump/llvm-objdump.h1
3 files changed, 136 insertions, 3 deletions
diff --git a/llvm/tools/llvm-objdump/MachODump.cpp b/llvm/tools/llvm-objdump/MachODump.cpp
index 34ad57167d0..d6e8e0a01a8 100644
--- a/llvm/tools/llvm-objdump/MachODump.cpp
+++ b/llvm/tools/llvm-objdump/MachODump.cpp
@@ -75,6 +75,11 @@ cl::opt<bool>
cl::desc("Print archive headers for Mach-O archives "
"(requires -macho)"));
+cl::opt<bool>
+ llvm::IndirectSymbols("indirect-symbols",
+ cl::desc("Print indirect symbol table for Mach-O "
+ "objects (requires -macho)"));
+
static cl::list<std::string>
ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
cl::ZeroOrMore);
@@ -260,6 +265,130 @@ static void getSectionsAndSymbols(const MachO::mach_header Header,
}
}
+static void PrintIndirectSymbolTable(MachOObjectFile *O, bool verbose,
+ uint32_t n, uint32_t count,
+ uint32_t stride, uint64_t addr) {
+ MachO::dysymtab_command Dysymtab = O->getDysymtabLoadCommand();
+ uint32_t nindirectsyms = Dysymtab.nindirectsyms;
+ if (n > nindirectsyms)
+ outs() << " (entries start past the end of the indirect symbol "
+ "table) (reserved1 field greater than the table size)";
+ else if (n + count > nindirectsyms)
+ outs() << " (entries extends past the end of the indirect symbol "
+ "table)";
+ outs() << "\n";
+ uint32_t cputype = O->getHeader().cputype;
+ if (cputype & MachO::CPU_ARCH_ABI64)
+ outs() << "address index";
+ else
+ outs() << "address index";
+ if (verbose)
+ outs() << " name\n";
+ else
+ outs() << "\n";
+ for (uint32_t j = 0; j < count && n + j < nindirectsyms; j++) {
+ if (cputype & MachO::CPU_ARCH_ABI64)
+ outs() << format("0x%016" PRIx64, addr + j * stride) << " ";
+ else
+ outs() << format("0x%08" PRIx32, addr + j * stride) << " ";
+ MachO::dysymtab_command Dysymtab = O->getDysymtabLoadCommand();
+ uint32_t indirect_symbol = O->getIndirectSymbolTableEntry(Dysymtab, n + j);
+ if (indirect_symbol == MachO::INDIRECT_SYMBOL_LOCAL) {
+ outs() << "LOCAL\n";
+ continue;
+ }
+ if (indirect_symbol ==
+ (MachO::INDIRECT_SYMBOL_LOCAL | MachO::INDIRECT_SYMBOL_ABS)) {
+ outs() << "LOCAL ABSOLUTE\n";
+ continue;
+ }
+ if (indirect_symbol == MachO::INDIRECT_SYMBOL_ABS) {
+ outs() << "ABSOLUTE\n";
+ continue;
+ }
+ outs() << format("%5u ", indirect_symbol);
+ MachO::symtab_command Symtab = O->getSymtabLoadCommand();
+ if (indirect_symbol < Symtab.nsyms) {
+ symbol_iterator Sym = O->getSymbolByIndex(indirect_symbol);
+ SymbolRef Symbol = *Sym;
+ StringRef SymName;
+ Symbol.getName(SymName);
+ outs() << SymName;
+ } else {
+ outs() << "?";
+ }
+ outs() << "\n";
+ }
+}
+
+static void PrintIndirectSymbols(MachOObjectFile *O, bool verbose) {
+ uint32_t LoadCommandCount = O->getHeader().ncmds;
+ MachOObjectFile::LoadCommandInfo Load = O->getFirstLoadCommandInfo();
+ for (unsigned I = 0;; ++I) {
+ if (Load.C.cmd == MachO::LC_SEGMENT_64) {
+ MachO::segment_command_64 Seg = O->getSegment64LoadCommand(Load);
+ for (unsigned J = 0; J < Seg.nsects; ++J) {
+ MachO::section_64 Sec = O->getSection64(Load, J);
+ uint32_t section_type = Sec.flags & MachO::SECTION_TYPE;
+ if (section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS ||
+ section_type == MachO::S_LAZY_SYMBOL_POINTERS ||
+ section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS ||
+ section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS ||
+ section_type == MachO::S_SYMBOL_STUBS) {
+ uint32_t stride;
+ if (section_type == MachO::S_SYMBOL_STUBS)
+ stride = Sec.reserved2;
+ else
+ stride = 8;
+ if (stride == 0) {
+ outs() << "Can't print indirect symbols for (" << Sec.segname << ","
+ << Sec.sectname << ") "
+ << "(size of stubs in reserved2 field is zero)\n";
+ continue;
+ }
+ uint32_t count = Sec.size / stride;
+ outs() << "Indirect symbols for (" << Sec.segname << ","
+ << Sec.sectname << ") " << count << " entries";
+ uint32_t n = Sec.reserved1;
+ PrintIndirectSymbolTable(O, verbose, n, count, stride, Sec.addr);
+ }
+ }
+ } else if (Load.C.cmd == MachO::LC_SEGMENT) {
+ MachO::segment_command Seg = O->getSegmentLoadCommand(Load);
+ for (unsigned J = 0; J < Seg.nsects; ++J) {
+ MachO::section Sec = O->getSection(Load, J);
+ uint32_t section_type = Sec.flags & MachO::SECTION_TYPE;
+ if (section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS ||
+ section_type == MachO::S_LAZY_SYMBOL_POINTERS ||
+ section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS ||
+ section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS ||
+ section_type == MachO::S_SYMBOL_STUBS) {
+ uint32_t stride;
+ if (section_type == MachO::S_SYMBOL_STUBS)
+ stride = Sec.reserved2;
+ else
+ stride = 4;
+ if (stride == 0) {
+ outs() << "Can't print indirect symbols for (" << Sec.segname << ","
+ << Sec.sectname << ") "
+ << "(size of stubs in reserved2 field is zero)\n";
+ continue;
+ }
+ uint32_t count = Sec.size / stride;
+ outs() << "Indirect symbols for (" << Sec.segname << ","
+ << Sec.sectname << ") " << count << " entries";
+ uint32_t n = Sec.reserved1;
+ PrintIndirectSymbolTable(O, verbose, n, count, stride, Sec.addr);
+ }
+ }
+ }
+ if (I == LoadCommandCount - 1)
+ break;
+ else
+ Load = O->getNextLoadCommandInfo(Load);
+ }
+}
+
// checkMachOAndArchFlags() checks to see if the ObjectFile is a Mach-O file
// and if it is and there is a list of architecture flags is specified then
// check to make sure this Mach-O file is one of those architectures or all
@@ -305,9 +434,9 @@ static void ProcessMachO(StringRef Filename, MachOObjectFile *MachOOF,
StringRef ArchitectureName = StringRef()) {
// If we are doing some processing here on the Mach-O file print the header
// info. And don't print it otherwise like in the case of printing the
- // UniversalHeaders.
+ // UniversalHeaders or ArchiveHeaders.
if (Disassemble || PrivateHeaders || ExportsTrie || Rebase || Bind ||
- LazyBind || WeakBind) {
+ LazyBind || WeakBind || IndirectSymbols) {
outs() << Filename;
if (!ArchiveMemberName.empty())
outs() << '(' << ArchiveMemberName << ')';
@@ -318,6 +447,8 @@ static void ProcessMachO(StringRef Filename, MachOObjectFile *MachOOF,
if (Disassemble)
DisassembleMachO(Filename, MachOOF);
+ if (IndirectSymbols)
+ PrintIndirectSymbols(MachOOF, true);
if (Relocations)
PrintRelocations(MachOOF);
if (SectionHeaders)
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index 76c8af42056..f9660fef9fc 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -893,7 +893,8 @@ int main(int argc, char **argv) {
&& !LazyBind
&& !WeakBind
&& !(UniversalHeaders && MachOOpt)
- && !(ArchiveHeaders && MachOOpt)) {
+ && !(ArchiveHeaders && MachOOpt)
+ && !(IndirectSymbols && MachOOpt)) {
cl::PrintHelpMessage();
return 2;
}
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.h b/llvm/tools/llvm-objdump/llvm-objdump.h
index a0e0d5a6a6c..3549a79d585 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.h
+++ b/llvm/tools/llvm-objdump/llvm-objdump.h
@@ -36,6 +36,7 @@ extern cl::opt<bool> LazyBind;
extern cl::opt<bool> WeakBind;
extern cl::opt<bool> UniversalHeaders;
extern cl::opt<bool> ArchiveHeaders;
+extern cl::opt<bool> IndirectSymbols;
extern cl::opt<bool> Relocations;
extern cl::opt<bool> SectionHeaders;
extern cl::opt<bool> SectionContents;
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