Mathieu Lacage <mathieu.lacage@xxxxxxxxx> writes: > I wonder if it's possible to ask gcc to generate code for a function > as if all registers were callee-saved. i.e., I would like to make sure > that my function does not touch _any_ register from the perspective of > the caller, independently from the abi calling convention. I could > write my own prologue/epilogue to save/restore all registers by hand > but it's not really a lot of fun... This is available on some targets via a function attribute, but it is not available on all targets. E.g., for MIPS targets, see the "interrupt" function attribute. Ian
