1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ralph Campbell. 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 * $FreeBSD$ 37 */ 38 39#include <machine/regnum.h> 40#include <machine/asm.h> 41 42#if 0 43#if defined(LIBC_SCCS) 44 .text 45 .asciz "$OpenBSD: _setjmp.S,v 1.6 1996/09/23 21:27:53 imp Exp $" 46#endif /* LIBC_SCCS */ 47#endif 48 49/* 50 * C library -- _setjmp, _longjmp 51 * 52 * _longjmp(a,v) 53 * will generate a "return(v)" from 54 * the last call to 55 * _setjmp(a) 56 * by restoring registers from the stack, 57 * The previous signal state is NOT restored. 58 */ 59 60LEAF(_setjmp) 61 .set noreorder 62 REG_LI v0, 0xACEDBADE # sigcontext magic number 63 REG_S ra, (2 * SZREG)(a0) # sc_pc = return address 64 REG_S v0, (3 * SZREG)(a0) # saved in sc_regs[0] 65 REG_S s0, ((S0 + 3) * SZREG)(a0) 66 REG_S s1, ((S1 + 3) * SZREG)(a0) 67 REG_S s2, ((S2 + 3) * SZREG)(a0) 68 REG_S s3, ((S3 + 3) * SZREG)(a0) 69 REG_S s4, ((S4 + 3) * SZREG)(a0) 70 REG_S s5, ((S5 + 3) * SZREG)(a0) 71 REG_S s6, ((S6 + 3) * SZREG)(a0) 72 REG_S s7, ((S7 + 3) * SZREG)(a0) 73 REG_S sp, ((SP + 3) * SZREG)(a0) 74 REG_S s8, ((S8 + 3) * SZREG)(a0) 75 j ra 76 move v0, zero 77END(_setjmp) 78 79LEAF(_longjmp) 80#ifdef ABICALLS 81 subu sp, sp, 32 82 .cprestore 16 83#endif 84 .set noreorder 85 REG_L v0, (3 * SZREG)(a0) # get magic number 86 REG_L ra, (2 * SZREG)(a0) 87 bne v0, 0xACEDBADE, botch # jump if error 88 89 addu sp, sp, 32 # does not matter, sanity 90 REG_L s0, ((S0 + 3) * SZREG)(a0) 91 REG_L s1, ((S1 + 3) * SZREG)(a0) 92 REG_L s2, ((S2 + 3) * SZREG)(a0) 93 REG_L s3, ((S3 + 3) * SZREG)(a0) 94 REG_L s4, ((S4 + 3) * SZREG)(a0) 95 REG_L s5, ((S5 + 3) * SZREG)(a0) 96 REG_L s6, ((S6 + 3) * SZREG)(a0) 97 REG_L s7, ((S7 + 3) * SZREG)(a0) 98 REG_L sp, ((SP + 3) * SZREG)(a0) 99 REG_L s8, ((S8 + 3) * SZREG)(a0) 100 101 j ra 102 move v0, a1 103botch: 104 jal _C_LABEL(longjmperror) 105 nop 106 jal _C_LABEL(abort) 107 nop 108END(_longjmp) 109