setjmp.S (3045B)
1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 38 /* 39 * C library -- _setjmp, _longjmp 40 * 41 * longjmp(a,v) 42 * will generate a "return(v)" from the last call to 43 * setjmp(a) 44 * by restoring registers from the environment 'a'. 45 * The previous signal state is restored. 46 */ 47 48 #include <asm.h> 49 50 #define SIGPROCMASK 0 51 52 ENTRY(setjmp) 53 #if SIGPROCMASK 54 movl 4(%esp),%ecx 55 leal 28(%ecx), %eax 56 pushl %eax /* (sigset_t*)oset */ 57 pushl $0 /* (sigset_t*)set */ 58 pushl $1 /* SIG_BLOCK */ 59 call _sigprocmask 60 addl $12,%esp 61 #endif 62 movl 4(%esp),%ecx 63 movl 0(%esp),%edx 64 movl %edx, 0(%ecx) 65 movl %ebx, 4(%ecx) 66 movl %esp, 8(%ecx) 67 movl %ebp,12(%ecx) 68 movl %esi,16(%ecx) 69 movl %edi,20(%ecx) 70 fnstcw 24(%ecx) 71 xorl %eax,%eax 72 ret 73 74 ENTRY(longjmp) 75 #if SIGPROCMASK 76 movl 4(%esp),%edx 77 pushl $0 /* (sigset_t*)oset */ 78 leal 28(%edx), %eax 79 pushl %eax /* (sigset_t*)set */ 80 pushl $3 /* SIG_SETMASK */ 81 call _sigprocmask 82 addl $12,%esp 83 #endif 84 movl 4(%esp),%edx 85 movl 8(%esp),%eax 86 movl 0(%edx),%ecx 87 movl 4(%edx),%ebx 88 movl 8(%edx),%esp 89 movl 12(%edx),%ebp 90 movl 16(%edx),%esi 91 movl 20(%edx),%edi 92 fninit 93 fldcw 24(%edx) 94 testl %eax,%eax 95 jnz 1f 96 incl %eax 97 1: movl %ecx,0(%esp) 98 ret