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On Sat, Jan 10, 2004 at 08:49:49PM +0100, Andreas Jaeger wrote: > Andreas Jaeger <aj@suse.de> writes: > > > Jakub Jelinek <jakub@redhat.com> writes: > > [...] > >>> libc/sysdeps/x86_64/__longjmp.S > > > > What's the best way to handle the destroying of the registers with > > CFI? Should we just mark the registers with "cfi_undefined"? > > I'm appending a proposed patch for __longjmp.S. Or can anybody > envision a better way doing this? Cannot you from the first movq ***,%rbx pretend you're already at the jmpq %*rdx instruction, ie. unwind to the longjmp target? Write in the unwind info where to fetch %rbp, %r12..%r15, ra etc. from? Jakub
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