Here is a little X-mas present for those who want to do reverse engineering of ARM Thumb code with free (as in freedom) tools. I am publishing it here since the CHDK wiki was the only place I found information about disassembling ARM with the GNU toolchain when I was looking for this a while ago.
chr and
fudgey had written
disassemble.pl to make objdump more useful and provided me with the motivation to take it one step further. (BTW I added Thumb support to disassemble.pl, see
https://gitorious.org/lsd/disassembler)
So a few days ago I wrote a new tool from scratch,
traverse.pl, which similarly to disassemble.pl uses objdump for the disassembly itself, but also tries to automate the task of following code paths and separating code from inlined data. It collects function calls to generate a call graph. The user can add labels to known addresses, which will appear in the code listing and call graphs.
This is more proof of concept than a real application, but it works well enough to be useful for me. It is currently only tested with Thumb code (for Cortex-M3) and will probably need patching to work on other architectures. Patches and comments are very welcome.
The tool can be found at
https://gitorious.org/lsd/discoveryBest regards,
Tormod
