[PATCH v2][AArch64] Add more cfi annotations to tlsdesc entry points

[Adhemerval Zanella]

On 23/01/2017 09:31, Szabolcs Nagy wrote:
> On 06/01/17 15:57, Szabolcs Nagy wrote:
>> On 13/12/16 12:34, Szabolcs Nagy wrote:
>>> Backtrace through _dl_tlsdesc_resolve_rela was broken because the offset
>>> of x30 from cfa was not in the debug info.
>>>
>>> Add enough annotation so backtracing from the dynamic linker through
>>> tlsdesc entry points works and the debugger shows registers correctly.
>>>
>>> v2:
>>> - group cfi_rel_offset annotations for smaller debug info.
>>>
>>> 2016-12-13  Szabolcs Nagy  <szabolcs.nagy@arm.com>
>>>
>>> 	* sysdeps/aarch64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Add cfi
>>> 	annotation.
>>> 	(_dl_tlsdesc_resolve_rela, _dl_tlsdesc_resolve_hold): Likewise.
>>>
>>
>> ping.
>>
> 
> ping.
> 
> this is a bug fix which should go in 2.25 i think.
> (e.g. the elf/tst-tls-manydynamic crash is hard to debug without this).
> 

Sorry if I did catch this up for 2.25, LGTM.  I think it is worth to at
least backport to 2.25 branch.