Re: [Libunwind-devel] [PATCH] [MIPS] Stack-unwinding through signal frames

[Faraz Shahbazker]

On 03/17/2015 06:40 PM, Arun Sharma wrote:
> On Tue, Mar 17, 2015 at 10:40 AM, Faraz Shahbazker
> <address@hidden> wrote:
>> On 03/16/2015 09:17 PM, Arun Sharma wrote:
>>> On Mon, Mar 16, 2015 at 1:13 PM,  <address@hidden> wrote:
>>>> From: Faraz Shahbazker <address@hidden>
>>>>
>>>> Detect if current frame is a signal frame by checking for preceeding
>>>> syscall instruction. For signal frames, update the cursor correctly
>>>> from user context before calling dwarf_step.
>>>
>>> Is the dwarf CIE augmentation string unusable on mips?
>>
>> I am not sure. If you could please point me to another architecture that 
>> uses CIE string for detecting signal frames, I will check if that approach 
>> works for mips.
> 
> http://git.savannah.gnu.org/cgit/libunwind.git/tree/src/dwarf/Gfde.c#n191
> http://git.savannah.gnu.org/cgit/libunwind.git/tree/src/x86_64/Gos-linux.c#n39
> 
> Assumes your libc has the .cfi_signal_frame annotations in the right
> places.

Okay, looks like its not available for MIPS.

Regards,
Faraz Shahbazker