[PATCH] powerpc: Fix non-atomic stack pointer update in fortified longjmp (bug 34530)

[Adhemerval Zanella Netto]

On 24/08/26 13:22, Joseph Myers wrote:
> On Mon, 17 Aug 2026, Florian Weimer wrote:
> 
>> diff --git a/sysdeps/powerpc/powerpc32/__longjmp-common.S b/sysdeps/powerpc/powerpc32/__longjmp-common.S
>> index eb228bf4fe..9da86330f7 100644
>> --- a/sysdeps/powerpc/powerpc32/__longjmp-common.S
>> +++ b/sysdeps/powerpc/powerpc32/__longjmp-common.S
>> @@ -30,11 +30,12 @@ ENTRY (__longjmp_symbol)
>>  
>>  #if defined PTR_DEMANGLE || defined CHECK_SP
>>  	lwz r24,(JB_GPR1*4)(r3)
>> +# ifdef PTR_DEMANGLE
>> +	PTR_DEMANGLE (r24, r25)
>> +# endif
>>  # ifdef CHECK_SP
>> -#  ifdef PTR_DEMANGLE
>> -	PTR_DEMANGLE3 (r24, r24, r25)
>> -#  endif
>>  	CHECK_SP (r24)
>> +# endif
>>  	mr r1,r24
>>  # endif
>>  #else
> 
> This breaks the build for powerpc soft-float (error: '#else' without 
> '#if').
> 

I hit the same issue, I am about to install a fix.