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SubjectRe: [PATCH v2 07/10] objtool: check: Allow save/restore hint in non standard function symbols

On 4/1/20 2:54 PM, Miroslav Benes wrote:
> On Fri, 27 Mar 2020, Julien Thierry wrote:
>> The kernel code base provides CODE_SYM_START/END to declare assembly
>> code sequences that don't follow function standard calling conventions.
>> As non-C/non-standard code, these sequences can very much benefit from
>> unwind hints. However, when a restore unwind_hint is used in a
>> non-function code sequence, objtool will crash when looking for the
>> corresponding save hint.
>> Record the code symbol an instruction belongs to and look for save hints
>> belonging to the same code symbol as the restore hint.
>> Signed-off-by: Julien Thierry <>
> Looks ok, but save/restore hints are about to go away. See

Ah, just as I started bringing unwind hints to the arm64 side...

I'll have to scratch my head a bit more over this then. Thanks for
bringing it to my attention.


Julien Thierry

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