[rfa:NetBSD/ppc] Implement signal trampoline unwinder

[Jason Thorpe]

On Mar 3, 2004, at 12:43 PM, Andrew Cagney wrote:

> Jason, am I correct to assume that the second SC here:
>
> (gdb) x/10i $lr
> 0x7fffefdc:     addi    r3,r1,24
> 0x7fffefe0:     li      r0,295
> 0x7fffefe4:     sc

This is __sigreturn14

> 0x7fffefe8:     li      r0,1
> 0x7fffefec:     sc

and this is exit (process croaks if sigreturn failed).

> 0x7fffeff0:     .long 0x7fffe56c
>
> isn't part of the sigtramp?
>
> Andrew
>
>
         -- Jason R. Thorpe <thorpej@wasabisystems.com>

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