This is not appropriate for gcc@xxxxxxxxxxx, which is for gcc development. I'm redirecting this reply to gcc-help. skaller writes: > In > > http://gcc.gnu.org/onlinedocs/gcc-4.2.2/gcc/Explicit-Reg-Vars.html#Explicit-Reg-Vars > > it explains how to use register variables .. but doesn't list them. > > Is there a document somewhere which lists > > a) each CPU macro name > b) all the registers supported > > ? Not as far as I'm aware. All of this information is in the gcc/config/<cpu> directory, so can fairly easily be extracted. > I need to get the stack pointer when __builtin_frame_address(0) isn't > working .. on amd64 this: > > > register void *stack asm ("%rsp"); > > appears to work. Also this is the current stack pointer .. not > the frame pointer, which could be different. Right, and in fact there need not even be a frame pointer, which is why you have to use __builtin_frame_address. Andrew.
