Dima Sorkin <dmitri.sorkin@xxxxxxxxx> writes: > Consider a function > void f(); > > Is there a way to specify that this function should not clobber any register (i.e. save every register it uses on the stack), even if ABI permits to clobber certain registers ? gcc has that feature for certain targets but not for all, via a function attribute. You didn't mention which target you are using. The feature is not available on x86. > If a way exists, is it in standard C (for example C99), or GCC extension ? The feature, when supported, is a GCC extension. There is no way to request this in standard C. Ian
