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Refactor data-in-code annotations.

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Use a dedicated MachO load command to annotate data-in-code regions.
This is the same format the linker produces for final executable images,
allowing consistency of representation and use of introspection tools
for both object and executable files.

Data-in-code regions are annotated via ".data_region"/".end_data_region"
directive pairs, with an optional region type.

data_region_directive := ".data_region" { region_type }
region_type := "jt8" | "jt16" | "jt32" | "jta32"
end_data_region_directive := ".end_data_region"

The previous handling of ARM-style "$d.*" labels was broken and has
been removed. Specifically, it didn't handle ARM vs. Thumb mode when
marking the end of the section.

rdar://11459456

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157062 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2012-05-18 19:12:01 +00:00
parent 18e2f6e94c
commit 3e96531186
28 changed files with 411 additions and 215 deletions
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32
tools/macho-dump/macho-dump.cpp
View File

@@ -332,6 +332,35 @@ static int DumpLinkeditDataCommand(MachOObject &Obj,
return 0;
}
static int DumpDataInCodeDataCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::LinkeditDataLoadCommand> LLC;
Obj.ReadLinkeditDataLoadCommand(LCI, LLC);
if (!LLC)
return Error("unable to read segment load command");
outs() << " ('dataoff', " << LLC->DataOffset << ")\n"
<< " ('datasize', " << LLC->DataSize << ")\n"
<< " ('_data_regions', [\n";
unsigned NumRegions = LLC->DataSize / 8;
for (unsigned i = 0; i < NumRegions; ++i) {
InMemoryStruct<macho::DataInCodeTableEntry> DICE;
Obj.ReadDataInCodeTableEntry(LLC->DataOffset, i, DICE);
if (!DICE)
return Error("unable to read DataInCodeTableEntry");
outs() << " # DICE " << i << "\n"
<< " ('offset', " << DICE->Offset << ")\n"
<< " ('length', " << DICE->Length << ")\n"
<< " ('kind', " << DICE->Kind << ")\n";
}
outs() <<" ])\n";
return 0;
}
static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
const MachOObject::LoadCommandInfo &LCI = Obj.getLoadCommandInfo(Index);
@@ -358,6 +387,9 @@ static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
case macho::LCT_FunctionStarts:
Res = DumpLinkeditDataCommand(Obj, LCI);
break;
case macho::LCT_DataInCode:
Res = DumpDataInCodeDataCommand(Obj, LCI);
break;
default:
Warning("unknown load command: " + Twine(LCI.Command.Type));
break;