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SubjectRe: [PATCH v5 02/16] powerpc: Override __ALIGN and __ALIGN_STR macros
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Christophe Leroy <christophe.leroy@csgroup.eu> writes:
> Le 28/10/2022 à 16:33, Sathvika Vasireddy a écrit :
>> In a subsequent patch, we would want to annotate powerpc assembly functions
>> with SYM_FUNC_START_LOCAL macro. This macro depends on __ALIGN macro.
>>
>> The default expansion of __ALIGN macro is:
>> #define __ALIGN .align 4,0x90
>>
>> So, override __ALIGN and __ALIGN_STR macros to use the same alignment as
>> that of the existing _GLOBAL macro. Also, do not pad with 0x90, because
>> repeated 0x90s are not a nop or trap on powerpc.
>
> By the way, do we know what the instruction 0x90909090 is on powerpc ?
> Is that something valid or not ?

According to objdump it's:

stw r4,-28528(r16)

cheers

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