Help with cfi markup for MIPS16 hard-float stubs

[Richard Henderson]

On 02/16/2012 07:40 AM, Andreas Krebbel wrote:
> On 02/15/2012 08:53 PM, Richard Sandiford wrote:
>> This fixes gdb backtraces from a stripped executable, but libgcc's
>> unwinder seems to get confused by having a stub in the middle of the
>> trace that (a) isn't a signal handler and (b) has no frame of its own.
>> The CFA at the point of the call to the stub (i.e. the point that is
>> trying to catch the exception) is the same as the CFA at the call
>> in the stub itself.  We then trip:
>>
>>       /* Don't let us unwind past the handler context.  */
>>       gcc_assert (!match_handler);
>>
>> in _Unwind_RaiseException_Phase2.  What's the right thing to do here?
> 
> Looks like the same problem I'm having on s390 with a java testcase:
> http://gcc.gnu.org/ml/gcc/2012-01/msg00341.html

Same symptom, but isn't the s390 problem that you failed to set
the signal frame bit on the signal frame?


r~