On Wed, Jul 08, 2020 at 08:01:23PM -0400, Mathieu Desnoyers wrote: > > > #define RSEQ_ASM_OP_CMPEQ(var, expect, label) > > > \ > > > LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" > > > \ > > > > The way this hardcodes r17 *will* break, btw. The compiler will not > > likely want to use r17 as long as your code (after inlining etc.!) stays > > small, but there is Murphy's law. > > r17 is in the clobber list, so it should be ok.
What protects r17 *after* this asm statement? Segher
