idb2pat, is it working for MIPS ? about flare-ida

[williballenthin]

is there any other stack trace information visible that you can share with me? that will help me find the function with the overflow, and hopefully get it working for you.

if there's any chance you can share the binary then that would certainly help, but i understand it may be sensitive. so if you cannot, we can continue to discuss and traige the bug here.

[dummys]

Yeah the binary is not an option, sorry.
I'm at home now, I share with you the trace tomorrow.
Thanks

[dummys]

INFO:idb2pat:make_func_sigs:[ 0 / 9215 ] _start 0x80001000L
ERROR:idb2pat:make_func_sigs:Python int too large to convert to C long
Traceback (most recent call last):
File "G:/tools/hexrays/ida/ida_plugins_scripts/flare_repo/python/flare/idb2pat.py", line 360, in make_func_sigs
sigs.append(make_func_sig(config, f))
File "G:/tools/hexrays/ida/ida_plugins_scripts/flare_repo/python/flare/idb2pat.py", line 193, in make_func_sig
ref_loc = find_ref_loc(config, ea, ref)
File "G:/tools/hexrays/ida/ida_plugins_scripts/flare_repo/python/flare/idb2pat.py", line 143, in find_ref_loc
for i in xrange(ea, get_item_end(ea) - config.pointer_size):
OverflowError: Python int too large to convert to C long
ERROR:idb2pat:make_func_sigs:Failed to create signature for function at 0x80001000L (_start)
INFO:idb2pat:make_func_sigs:[ 1 / 9215 ] _invalidate_cache 0x8000129cL
ERROR:idb2pat:make_func_sigs:Python int too large to convert to C long

And there is ton like this.

[williballenthin]

thanks for the traceback --- that leads me to believe the issue is in the xrange function, which has an odd limitation of having the platform's MAXINT as the upper bound.

would you try the script found here: https://raw.githubusercontent.com/williballenthin/flare-ida/c5259ffc2abaf9e757d0d53352ee2d3b99c5b60e/python/flare/idb2pat.py

this replaces calls to xrange with zrange, a function that shouldn't have the limitation.

[dummys]

Seems good for this issue, but another happend.
PS: I tested your script on another binary, elf and got the same issue for the index out of range.
EDIT: Issue solved by my commit for elf binary. Cannot test the mips one until monday, but I think the PR's will solve the issue on mips too.
EDIT: Found another problem with IDA 6.6 with Macho 32/64 binary, there is a infinite loop on line 163: if get_long(i) == ref: