x86_64 bt

Shahar Luxenberg <shahar@xxxxxxxxxxxxxx> · Thu, 7 May 2009 12:53:59 +0300

Hi,

I've bumped into two issues while using crash' bt command on
x86_64 architecture:

 Incomplete disassembly of gdb: gdb's
     x/i command was unable to detect the nopl machine instruction (opcode
     0x0f) – output was "(bad)". This resulted in an incorrect
     stack back trace since the frame size couldn't be calculated correctly. I've
     done a quick test, replacing some gdb files with a newer version taken
     from binutils (i386-dis.c for example) which solved the problem. Is there
     a plan of updating gdb version or part of it?
 x86_64_get_framesize() is very naïve.
     It is bailing out once the 'retq' instruction is seen. Is this issue going
     to be addressed?

Thanks,

Shahar.

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