llvm-6502/lib
Ahmed Bougacha ef99356dfe MC: Disassembled CFG reconstruction.
This patch builds on some existing code to do CFG reconstruction from
a disassembled binary:
- MCModule represents the binary, and has a list of MCAtoms.
- MCAtom represents either disassembled instructions (MCTextAtom), or
  contiguous data (MCDataAtom), and covers a specific range of addresses.
- MCBasicBlock and MCFunction form the reconstructed CFG. An MCBB is
  backed by an MCTextAtom, and has the usual successors/predecessors.
- MCObjectDisassembler creates a module from an ObjectFile using a
  disassembler. It first builds an atom for each section. It can also
  construct the CFG, and this splits the text atoms into basic blocks.

MCModule and MCAtom were only sketched out; MCFunction and MCBB were
implemented under the experimental "-cfg" llvm-objdump -macho option.
This cleans them up for further use; llvm-objdump -d -cfg now generates
graphviz files for each function found in the binary.

In the future, MCObjectDisassembler may be the right place to do
"intelligent" disassembly: for example, handling constant islands is just
a matter of splitting the atom, using information that may be available
in the ObjectFile. Also, better initial atom formation than just using
sections is possible using symbols (and things like Mach-O's
function_starts load command).

This brings two minor regressions in llvm-objdump -macho -cfg:
- The printing of a relocation's referenced symbol.
- An annotation on loop BBs, i.e., which are their own successor.

Relocation printing is replaced by the MCSymbolizer; the basic CFG
annotation will be superseded by more related functionality.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182628 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-24 01:07:04 +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
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 Measure time that IR parsing took as part of the -time-passes measurement. 2013-04-03 15:33:45 +00:00
Linker Fix a performance bug in the Linker. 2013-05-04 05:05:18 +00:00
MC MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
Object Convert obj2yaml to use yamlio. 2013-05-17 22:58:42 +00:00
Option
Support MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
TableGen Allow TableGen DAG arguments to be just a name. 2013-03-24 19:36:51 +00:00
Target MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
Transforms Re-implement DebugIR in a way that does not subclass AssemblyWriter: 2013-05-23 22:34:33 +00:00
CMakeLists.txt Split out the IRReader header and the utility functions it provides into 2013-03-26 02:25:37 +00:00
LLVMBuild.txt Split out the IRReader header and the utility functions it provides into 2013-03-26 02:25:37 +00:00
Makefile Split out the IRReader header and the utility functions it provides into 2013-03-26 02:25:37 +00:00