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
..
ARM	Only run the tests in test/Object/ARM if we have ARM support.	2013-04-19 12:47:53 +00:00
Inputs	Split Alignment out of the Section Characteristics.	2013-05-06 20:11:21 +00:00
Mips	Implement sectionContainsSymbol for ELF.	2013-04-03 18:31:19 +00:00
X86	Add MCSymbolizer for symbolic/annotated disassembly.	2013-05-24 00:39:57 +00:00
archive-long-index.test
coff-archive.test
lit.local.cfg	Add .ll as a valid test suffix for Object, this allows .ll -> object	2013-04-22 10:45:06 +00:00
nm-archive.test
nm-shared-object.test
nm-trivial-object.test	Add missing ':'.	2013-04-26 17:54:46 +00:00
obj2yaml.test	Use std::list so that we have a stable iterator.	2013-05-21 18:53:50 +00:00
objdump-file-header.test
objdump-private-headers.test
objdump-relocations.test	Implement the "mips endian" for r_info.	2013-04-03 21:02:51 +00:00
objdump-section-content.test	llvm-objdump: Don't print contents of BSS sections: it makes no sense and crashes llvm-objdump on relocated objects with large bss	2013-04-16 10:53:11 +00:00
objdump-sectionheaders.test
objdump-symbol-table.test
readobj-elf-versioning.test	Implements low-level object file format specific output for COFF and	2013-04-03 18:31:38 +00:00
readobj-shared-object.test	Implements low-level object file format specific output for COFF and	2013-04-03 18:31:38 +00:00
readobj.test
relocation-executable.test	Change getRelocationAdditionalInfo to be ELF only.	2013-05-09 03:39:05 +00:00
simple-archive.test
yaml2obj-readobj.test	Write relocations in yaml2obj.	2013-04-23 15:53:02 +00:00