[PATCH][BZ #18508] S390: Fix "backtrace() returns infinitely deep stack frames with makecontext()".

[Carlos O'Donell]

On 07/08/2015 10:44 AM, H.J. Lu wrote:
>> For a quick test, I extracted the exitcode-block to a new function with
>> ENTRY/END-macros and undefined cfi_start/end_proc, like it is done in
>> s390-makecontext_ret - see attached patch. Afterwards _Unwind_backtrace does
>> not segfault anymore.
>>
>> Please test/comment.
> 
> It works.

But we don't really know why...

c.