1/* $OpenBSD: setjmp.S,v 1.7 2023/12/10 16:45:52 deraadt Exp $ */ 2/* $NetBSD: setjmp.S,v 1.4 2000/08/28 00:45:59 eeh Exp $ */ 3 4/* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This software was developed by the Computer Systems Engineering group 9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 10 * contributed to Berkeley. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. 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 * C library -- setjmp, longjmp 39 * 40 * longjmp(a,v) 41 * will generate a "return(v)" from 42 * the last call to 43 * setjmp(a) 44 * by restoring the previous context. 45 * The previous signal state is restored. 46 */ 47 48#include "SYS.h" 49 50ENTRY(setjmp) 51 mov %o0, %o3 /* Save our jmp_buf in %o3 */ 52 53 mov 1, %o0 /* SIG_BLOCK */ 54 mov SYS_sigprocmask, %g1 55 clr %o1 /* sigprocmask(SIG_BLOCK, 0) */ 5699: t ST_SYSCALL 57 PINSYSCALL(SYS_sigprocmask, 99b) 58 stx %o0, [%o3 + 0x10] 59 60 stx %sp, [%o3 + 0x00] /* store caller's stack pointer */ 61 stx %o7, [%o3 + 0x08] /* ... and return pc */ 62 retl 63 clr %o0 /* return 0 */ 64 65ENTRY(longjmp) 66 save %sp, -CC64FSZ, %sp 67 flushw 68 69 mov 3, %o0 /* SIG_SETMASK */ 70 ldx [%i0 + 0x10], %o1 71 mov SYS_sigprocmask, %g1 7298: t ST_SYSCALL 73 PINSYSCALL(SYS_sigprocmask, 98b) 74 75 ldx [%i0 + 0x00], %fp 76 ldx [%i0 + 0x08], %i7 77 mov 1, %i0 78 movrnz %i1, %i1, %i0 ! compute v ? v : 1 79 ret 80 restore 81