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.foriss...@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 >> >
