Ahmed Bougacha 2c94d0faa0 Add MCSymbolizer for symbolic/annotated disassembly. ... This is a basic first step towards symbolization of disassembled instructions. This used to be done using externally provided (C API) callbacks. This patch introduces: - the MCSymbolizer class, that mimics the same functions that were used in the X86 and ARM disassemblers to symbolize immediate operands and to annotate loads based off PC (for things like c string literals). - the MCExternalSymbolizer class, which implements the old C API. - the MCRelocationInfo class, which provides a way for targets to translate relocations (either object::RelocationRef, or disassembler C API VariantKinds) to MCExprs. - the MCObjectSymbolizer class, which does symbolization using what it finds in an object::ObjectFile. This makes simple symbolization (with no fancy relocation stuff) work for all object formats! - x86-64 Mach-O and ELF MCRelocationInfos. - A basic ARM Mach-O MCRelocationInfo, that provides just enough to support the C API VariantKinds. Most of what works in otool (the only user of the old symbolization API that I know of) for x86-64 symbolic disassembly (-tvV) works, namely: - symbol references: call _foo; jmp 15 <_foo+50> - relocations: call _foo-_bar; call _foo-4 - __cf?string: leaq 193(%rip), %rax ## literal pool for "hello" Stub support is the main missing part (because libObject doesn't know, among other things, about mach-o indirect symbols). As for the MCSymbolizer API, instead of relying on the disassemblers to call the tryAdding* methods, maybe this could be done automagically using InstrInfo? For instance, even though PC-relative LEAs are used to get the address of string literals in a typical Mach-O file, a MOV would be used in an ELF file. And right now, the explicit symbolization only recognizes PC-relative LEAs. InstrInfo should have already have most of what is needed to know what to symbolize, so this can definitely be improved. I'd also like to remove object::RelocationRef::getValueString (it seems only used by relocation printing in objdump), as simply printing the created MCExpr is definitely enough (and cleaner than string concats). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182625 91177308-0d34-0410-b5e6-96231b3b80d8		2013-05-24 00:39:57 +00:00
..
Analysis	isKnownToBeAPowerOfTwo: (X & Y) + Y is a power of 2 or zero if y is also.	2013-05-18 19:30:37 +00:00
Archive	Fix auto_ptr is deprecated warnings	2013-02-26 21:20:35 +00:00
AsmParser	Add ArrayRef constructor from None, and do the cleanups that this constructor enables	2013-05-05 00:40:33 +00:00
Bitcode	Micro-optimization: don't shift an entire bitcode record over to get the code.	2013-05-10 22:17:10 +00:00
CodeGen	Fix PR16110: Handle DBG_VALUE in ConnectedVNInfoEqClasses::Distribute().	2013-05-23 17:02:23 +00:00
DebugInfo	libDebugInfo depends on libObject nowadays.	2013-05-09 13:48:26 +00:00
ExecutionEngine	Expose the RTDyldMemoryManager through the C API. This allows clients of	2013-05-22 02:46:43 +00:00
IR	Re-implement DebugIR in a way that does not subclass AssemblyWriter:	2013-05-23 22:34:33 +00:00
IRReader
Linker	Fix a performance bug in the Linker.	2013-05-04 05:05:18 +00:00
MC	Add MCSymbolizer for symbolic/annotated disassembly.	2013-05-24 00:39:57 +00:00
Object	Convert obj2yaml to use yamlio.	2013-05-17 22:58:42 +00:00
Option
Support	Add cmake bits for md5.	2013-05-21 01:30:38 +00:00
TableGen
Target	Add MCSymbolizer for symbolic/annotated disassembly.	2013-05-24 00:39:57 +00:00
Transforms	Re-implement DebugIR in a way that does not subclass AssemblyWriter:	2013-05-23 22:34:33 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile