/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
*
* File: sys/ppc/setjmp.s
*
* Implements sigsetjmp(), setjmp(), _setjmp()
*
* NOTE: Scatterloading this file will BREAK the functions.
*
* History:
* 30-Aug-1998 Umesh Vaishampayan (umeshv@apple.com)
* Created. Derived from _setjmp.s, setjmp.c and setjmp.s
*/
/* We use mode-independent "g" opcodes such as "stg", and/or
* mode-independent macros such as MI_GET_ADDRESS. These expand
* into word operations when targeting __ppc__, and into doubleword
* operations when targeting __ppc64__.
*/
#include <architecture/ppc/mode_independent_asm.h>
#include "_setjmp.h"
/*
* setjmp routines
*/
/* int sigsetjmp(sigjmp_buf env, int savemask)MI_ENTRY_POINT(_sigsetjmp)
cmpgi cr1,r4,0 beq-- cr1, L__exit
/* int setjmp(jmp_buf env)MI_ENTRY_POINT(_setjmp)
mflr r0
stg r31, JMP_r31(r3)
stg r0, JMP_lr(r3)
mr r31, r3 /* call sigprocmask() to get signal mask */
li r3, 1 la r5, JMP_sig(r31)
/* call sigaltstack() to get SS_ONSTACK flag */
li r3,0 MI_CALL_EXTERNAL(_sigaltstack) lwz r5,2*GPR_BYTES(r4)
mr r3, r31 lg r31, JMP_r31(r31)
mtlr r0
L__exit:
MI_BRANCH_EXTERNAL(__setjmp)