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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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13
lib/Object/MachOObject.cpp
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@@ -357,6 +357,19 @@ void MachOObject::ReadSymbol64TableEntry(uint64_t SymbolTableOffset,
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
}
template<>
void SwapStruct(macho::DataInCodeTableEntry &Value) {
SwapValue(Value.Offset);
SwapValue(Value.Length);
SwapValue(Value.Kind);
}
void MachOObject::ReadDataInCodeTableEntry(uint64_t TableOffset,
unsigned Index,
InMemoryStruct<macho::DataInCodeTableEntry> &Res) const {
uint64_t Offset = (TableOffset +
Index * sizeof(macho::DataInCodeTableEntry));
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
}
void MachOObject::ReadULEB128s(uint64_t Index,
SmallVectorImpl<uint64_t> &Out) const {