Re: [libunwind] unwinding through dynamically modified code?

[Todd L Miller]

> UNW_IA64_SP is what you want to use.  UNW_IA64_GR+12 only tells you
> about the last time the stack-pointer was saved, which is hardly
> useful.

        I'm not quite sure I understand the difference.  I'm away from my
references right now, but isn't the stack pointer defined to be r12?  (At
least, during normal operation, but that's precisely what I'm supposed to
be describing with the unwind information, right?)  Or is this distinction
more for the benefit of libunwind?

- Todd Miller