97 lines
3.3 KiB
ArmAsm
97 lines
3.3 KiB
ArmAsm
/* $NetBSD: _setjmp.S,v 1.5 1999/03/05 09:18:32 pk Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: Header: _setjmp.s,v 1.1 91/07/06 16:45:53 torek Exp
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
.asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93"
|
|
#else
|
|
RCSID("$NetBSD: _setjmp.S,v 1.5 1999/03/05 09:18:32 pk Exp $")
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
/*
|
|
* C library -- _setjmp, _longjmp
|
|
*
|
|
* _longjmp(a,v)
|
|
* will generate a "return(v?v:1)" from
|
|
* the last call to
|
|
* _setjmp(a)
|
|
* by unwinding the call stack.
|
|
* The previous signal state is NOT restored.
|
|
*/
|
|
|
|
ENTRY(_setjmp)
|
|
st %sp, [%o0+0] /* store caller's stack pointer */
|
|
st %o7, [%o0+4] /* ... return pc */
|
|
st %fp, [%o0+8] /* ... and frame pointer */
|
|
retl
|
|
clr %o0 ! return 0
|
|
|
|
ENTRY(_longjmp)
|
|
addcc %o1, %g0, %g6 ! compute v ? v : 1 in a global register
|
|
be,a 0f
|
|
mov 1, %g6
|
|
0:
|
|
mov %o0, %g1 ! save a in another global register
|
|
ld [%g1+8], %g7 /* get caller's frame */
|
|
1:
|
|
cmp %fp, %g7 ! compare against desired frame
|
|
bl,a 1b ! if below,
|
|
restore ! pop frame and loop
|
|
be,a 2f ! if there,
|
|
ld [%g1+0], %o2 ! fetch return %sp
|
|
|
|
Lbotch:
|
|
call _C_LABEL(longjmperror) ! otherwise, went too far; bomb out
|
|
nop
|
|
unimp 0
|
|
|
|
2:
|
|
cmp %o2, %sp ! %sp must not decrease
|
|
bge,a 3f
|
|
mov %o2, %sp ! it is OK, put it in place
|
|
b,a Lbotch
|
|
3:
|
|
ld [%g1+4], %o3 ! fetch pc
|
|
jmp %o3 + 8 ! success, return %g6
|
|
mov %g6, %o0
|