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!
! setjmp.S
!
! Basic setjmp/longjmp
!
! This code was based on the equivalent code in NetBSD
!
#include <machine/asm.h>
#include <machine/trap.h>
!
! The jmp_buf contains the following entries:
! sp
! fp
! pc
!
ENTRY(setjmp)
st %sp,[%o0+0] ! Callers stack pointer
st %o7,[%o0+4] ! Return pc
st %fp,[%o0+8] ! Frame pointer
retl ! Return
clr %o0 ! ...0
ENTRY(longjmp)
sub %sp, 64, %sp ! set up a local stack frame
0:
t ST_FLUSHWIN ! flush register windows out to memory
!
! We restore the saved stack pointer to %fp, then issue
! a restore instruction which will reload the register
! window from the stack.
!
ld [%o0+4], %o7 /* restore return pc */
ld [%o0+0], %fp /* and stack pointer */
retl ! success, return %g6
restore %o1, 0, %o0
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