1/* $OpenBSD: sigsetjmp.S,v 1.10 2005/08/07 16:40:14 espie Exp $ */ 2/*- 3 * Copyright (c) 2002 Steve Murphree, Jr. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Steve Murphree, Jr. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "SYS.h" 33 34/* 35 * C library -- sigsetjmp, siglongjmp 36 * 37 * siglongjmp(a,v) 38 * will generate a "return(v)" from 39 * the last call to 40 * sigsetjmp(a,m) 41 * by restoring registers from the stack, 42 * The previous signal state is restored if 'm' was non-zero. 43 * 44 * For m88k, we define our jmp_buf length 45 * to be the size of 21 longs. <machine/setjmp.h> 46 * The buffer's usage is as follows: 47 * 48 * jmp_buf[0] return address 49 * jmp_buf[1] signal set (if used) 50 * jmp_buf[2 to 19] r14 to r31 51 * jmp_buf[20] setjmp type 52 * 53 */ 54 55#include <machine/setjmp.h> 56 57#define SIGSETJMP_SIG 0x582e 58 59/* 60int sigsetjmp(jmp_buf env, int savemask); 61 */ 62ENTRY(sigsetjmp) 63 st r1, r2,0 /* save registers to the environment buffer */ 64 st r14,r2,8 65 st r15,r2,12 66 st r16,r2,16 67 st r17,r2,20 68 st r18,r2,24 69 st r19,r2,28 70 st r20,r2,32 71 st r21,r2,36 72 st r22,r2,40 73 st r23,r2,44 74 st r24,r2,48 75 st r25,r2,52 76 st r26,r2,56 77 st r27,r2,60 78 st r28,r2,64 79 st r29,r2,68 80 st r30,r2,72 81 st r31,r2,76 82 or r4,r0,0 /* clear r4 */ 83 or r4,r0,SIGSETJMP_SIG /* r4 now contains setjmp type */ 84 st r4,r2,80 /* setjmp type to _setjmp */ 85 86 or r15,r1,0 /* store return address in r15 */ 87 or r14,r2,0 /* store address of env in r14 */ 88 or r13,r3,0 /* store savemask in r13 */ 89 90 cmp r11,r13,r0 /* see if sigmask == 0 */ 91 bb1.n eq,r11,1f /* skip sig stuff */ 92 st r0,r14,4 /* but save 0 set in offset 4 of env first */ 93 94 bsr.n _C_LABEL(sigblock) /* r2 = sigblock(0) */ 95 or r2,r0,r0 96 st r2,r14,4 /* save signal set in offset 4 of env */ 97 981: or r1,r15,0 99 ld r15,r14,12 100 ld r14,r14,8 101 jmp.n r1 /* return 0 */ 102 or r2,r0,0 103 104/* 105void siglongjmp(sigjmp_buf env, int val); 106 */ 107ENTRY(siglongjmp) 108 cmp r4,r2,r0 /* check for bad environment buffer address. */ 109 bb1 eq,r4,3f /* if == 0, abort. */ 110 ld r4,r2,80 /* check setjmp type. */ 111 cmp r4,r4,SIGSETJMP_SIG /* should be SIGSETJMP_SIG */ 112 bb1 ne,r4,3f /* if != SIGSETJMP_SIG, abort. */ 113 114 subu r31,r31,16 /* get a temporary stack */ 115 ld r14,r2,8 /* restore registers from the environment buffer */ 116 ld r15,r2,12 117 ld r16,r2,16 118 ld r17,r2,20 119 ld r18,r2,24 120 ld r19,r2,28 121 ld r20,r2,32 122 ld r21,r2,36 123 ld r22,r2,40 124 ld r23,r2,44 125 ld r24,r2,48 126 ld r25,r2,52 127 ld r26,r2,56 128 ld r27,r2,60 129 ld r28,r2,64 130 ld r29,r2,68 131 132 ld r4,r2,4 /* get the signal set from env */ 133 cmp r4,r4,r0 /* if r2 == 0 then skip signal stuff */ 134 bb1 eq,r4,1f 135 136 st.d r2,r31,0 /* save r2 and r3 on stack (env + return val) */ 137 bsr.n _C_LABEL(sigsetmask) /* restore the signal set */ 138 ld r2,r2,4 139 ld.d r2,r31,0 /* restore r2 and r3 from stack */ 1401: ld r30,r2,72 /* restore r30 */ 141 ld r31,r2,76 /* restore r31 (sp)*/ 142 ld r1,r2,0 /* restore r1 */ 143 bcnd.n ne0,r3,3f 144 or r2,r3,r0 145 or r2,r0,1 /* never return zero! */ 1463: jmp r1 147 1482: subu r31,r31,16 /* get a temporary stack */ 149 st r1,r31,0 /* save r1 on stack (return address) */ 150 bsr _C_LABEL(longjmperror) 151 bsr _C_LABEL(abort) /* NO RETURN */ 152 ld r1,r31,0 /* restore r1 from stack */ 153 jmp.n r1 /* this should not happen but we are prepared */ 154 addu r31,r31,16 /* restore the stack */ 155