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/asm.h> 40 41#if 0 42#if defined(LIBC_SCCS) 43 .text 44 .asciz "$OpenBSD: _setjmp.S,v 1.6 1996/09/23 21:27:53 imp Exp $" 45#endif /* LIBC_SCCS */ 46#endif 47 48/* 49 * C library -- _setjmp, _longjmp 50 * 51 * _longjmp(a,v) 52 * will generate a "return(v)" from 53 * the last call to 54 * _setjmp(a) 55 * by restoring registers from the stack, 56 * The previous signal state is NOT restored. 57 */ 58 59LEAF(_setjmp) 60 .set noreorder 61 REG_LI v0, _JB_MAGIC__SETJMP # sigcontext magic number 62 REG_S v0, (_JB_MAGIC * SZREG)(a0) # saved in sc_regs[0] 63 REG_S ra, (_JB_REG_RA * SZREG)(a0) # sc_pc = return address 64 REG_S s0, (_JB_REG_S0 * SZREG)(a0) 65 REG_S s1, (_JB_REG_S1 * SZREG)(a0) 66 REG_S s2, (_JB_REG_S2 * SZREG)(a0) 67 REG_S s3, (_JB_REG_S3 * SZREG)(a0) 68 REG_S s4, (_JB_REG_S4 * SZREG)(a0) 69 REG_S s5, (_JB_REG_S5 * SZREG)(a0) 70 REG_S s6, (_JB_REG_S6 * SZREG)(a0) 71 REG_S s7, (_JB_REG_S7 * SZREG)(a0) 72 REG_S sp, (_JB_REG_SP * SZREG)(a0) 73 REG_S s8, (_JB_REG_S8 * SZREG)(a0) 74 j ra 75 move v0, zero 76END(_setjmp) 77 78LEAF(_longjmp) 79#ifdef ABICALLS 80 subu sp, sp, 32 81 .cprestore 16 82#endif 83 .set noreorder 84 REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number 85 REG_L ra, (_JB_REG_RA * SZREG)(a0) 86 bne v0, _JB_MAGIC__SETJMP, botch # jump if error 87 88 addu sp, sp, 32 # does not matter, sanity 89 REG_L s0, (_JB_REG_S0 * SZREG)(a0) 90 REG_L s1, (_JB_REG_S1 * SZREG)(a0) 91 REG_L s2, (_JB_REG_S2 * SZREG)(a0) 92 REG_L s3, (_JB_REG_S3 * SZREG)(a0) 93 REG_L s4, (_JB_REG_S4 * SZREG)(a0) 94 REG_L s5, (_JB_REG_S5 * SZREG)(a0) 95 REG_L s6, (_JB_REG_S6 * SZREG)(a0) 96 REG_L s7, (_JB_REG_S7 * SZREG)(a0) 97 REG_L sp, (_JB_REG_SP * SZREG)(a0) 98 REG_L s8, (_JB_REG_S8 * SZREG)(a0) 99 100 j ra 101 move v0, a1 102botch: 103 jal _C_LABEL(longjmperror) 104 nop 105 jal _C_LABEL(abort) 106 nop 107END(_longjmp) 108