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
Archive
Assembler
Bindings/Ocaml
Bitcode
BugPoint
CodeGen	ARM: implement @llvm.readcyclecounter intrinsic	2013-05-23 19:11:20 +00:00
DebugInfo	Solidify the assumption that a DW_TAG_subprogram's type is a DW_TAG_subroutine_type	2013-05-22 23:22:18 +00:00
ExecutionEngine	Disable remote MCJIT on pre-v6 ARM	2013-05-20 07:46:06 +00:00
Feature
FileCheck
Instrumentation	[msan] A no-op implementation of VarArg handling.	2013-05-21 12:27:47 +00:00
Integer
JitListener
Linker
MC	VSTn instructions have a number of encoding constraints which are not implemented. I have added these using wrapper methods around the original custom decoder (incidentally - this is a huge poorly written method that should be cleaned up. I have left it as is since the changes would be much to hard to review).	2013-05-20 14:57:05 +00:00
Object	Add MCSymbolizer for symbolic/annotated disassembly.	2013-05-24 00:39:57 +00:00
Other
TableGen
tools
Transforms	SLPVectorizer: Change the order in which new instructions are added to the function.	2013-05-22 19:47:32 +00:00
Unit
Verifier
YAMLParser
CMakeLists.txt
lit.cfg
lit.site.cfg.in
Makefile	add polly to check-all	2013-05-20 18:49:15 +00:00
Makefile.tests
TestRunner.sh