[PATCH v2 01/14] arch: introduce symbol HAVE_INITJMP

[Jerome Forissier]

On 2/28/25 13:38, Heinrich Schuchardt wrote:
> On 25.02.25 17:34, Jerome Forissier wrote:
>> HAVE_INIJMP will be set by architectures that support initjmp(), a
>> non-standard extension to setjmp()/longjmp() allowing to initialize a
>> jump buffer with a function pointer and a stack pointer. This will be
>> useful to later introduce threads. With this new function it becomes
>> possible to longjmp() to a particular function pointer (rather than
>> to a point previously reached during program execution as is the case
>> with setjmp()), and with a custom stack. Both things are needed to
>> spin off a new thread. Then the usual setjmp()/ longjmp() pair is
>> enough to save and restore a context, i.e., switch thread.
>>
>> Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
>> ---
>>   arch/Kconfig | 6 ++++++
>>   1 file changed, 6 insertions(+)
>>
>> diff --git a/arch/Kconfig b/arch/Kconfig
>> index 35b19f9bfdc..8d5b54031b3 100644
>> --- a/arch/Kconfig
>> +++ b/arch/Kconfig
>> @@ -13,6 +13,12 @@ config HAVE_SETJMP
>>       help
>>        The architecture supports setjmp() and longjmp().
>>
>> +config HAVE_INITJMP
>> +    bool
> 
> HAVE_SETJMP controls if /arch/<arch>/lib/setjmp.S is compiled.
> 
> Please, add the missing dependency.
> 
>     depends HAVE_SETJMP

Ack.

Thanks,
-- 
Jerome

> Best regards
> 
> Heinrich
> 
>> +    help
>> +     The architecture supports initjmp(), a non-standard companion to
>> +     setjmp() and longjmp().
>> +
>>   config SUPPORT_BIG_ENDIAN
>>       bool
>>
>