1/*- 2 * Copyright (c) 2002 Steve Murphree, Jr. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Steve Murphree, Jr. 16 * 4. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#if defined(LIBC_SCCS) 32 .data 33 .string "$OpenBSD: sigsetjmp.S,v 1.5 2003/01/07 22:01:29 miod Exp $" 34#endif /* LIBC_SCCS */ 35 36#include "SYS.h" 37 38/* 39 * C library -- sigsetjmp, siglongjmp 40 * 41 * siglongjmp(a,v) 42 * will generate a "return(v)" from 43 * the last call to 44 * sigsetjmp(a,m) 45 * by restoring registers from the stack, 46 * The previous signal state is restored if 'm' was non-zero. 47 * 48 * For m88k, we define our jmp_buf length 49 * to be the size of 22 longs. <machine/setjmp.h> 50 * The buffer's usage is as follows: 51 * 52 * jmp_buf[0] return address 53 * jmp_buf[1] signal set (if used) 54 * jmp_buf[2 to 19] r14 to r31 55 * jmp_buf[20] 'used' flag 56 * jmp_buf[21] setjmp type 57 * 58 */ 59 60#include <machine/setjmp.h> 61 62#define SIGSETJMP_SIG 0x582e 63 64/* 65int sigsetjmp(jmp_buf env, int savemask); 66 */ 67ENTRY(sigsetjmp) 68 st r1, r2,0 /* save registers to the environment buffer */ 69 st r14,r2,8 70 st r15,r2,12 71 st r16,r2,16 72 st r17,r2,20 73 st r18,r2,24 74 st r19,r2,28 75 st r20,r2,32 76 st r21,r2,36 77 st r22,r2,40 78 st r23,r2,44 79 st r24,r2,48 80 st r25,r2,52 81 st r26,r2,56 82 st r27,r2,60 83 st r28,r2,64 84 st r29,r2,68 85 st r30,r2,72 86 st r31,r2,76 87 st r0,r2,80 /* mark environment as NOT returned (0x0) */ 88 or r4,r0,0 /* clear r4 */ 89 or r4,r0,SIGSETJMP_SIG /* r4 now contains setjmp type */ 90 st r4,r2,84 /* setjmp type to _setjmp */ 91 92 or r15,r1,0 /* store return address in r15 */ 93 or r14,r2,0 /* store address of env in r14 */ 94 or r13,r3,0 /* store savemask in r13 */ 95 96 cmp r11,r13,r0 /* see if sigmask == 0 */ 97 bb1.n eq,r1,1f /* skip sig stuff */ 98 st r0,r14,4 /* but save 0 set in offset 4 of env first */ 99 100 bsr.n _C_LABEL(sigblock) /* r2 = sigblock(savemask) */ 101 or r2,r0,r13 102 st r2,r14,4 /* save signal set in offset 4 of env */ 1031: jmp.n r15 /* return 0 */ 104 or r2,r0,0 105 106/* 107void siglongjmp(sigjmp_buf env, int val); 108 */ 109ENTRY(siglongjmp) 110 cmp r4,r2,r0 /* check for bad environment buffer address. */ 111 bb1 eq,r4,3f /* if == 0, abort. */ 112 ld r4,r2,80 /* check if environment buffer has */ 113 cmp r4,r4,r0 /* already returned. */ 114 bb1 ne,r4,3f /* if != 0, abort. */ 115 ld r4,r2,84 /* check setjmp type. */ 116 cmp r4,r4,SIGSETJMP_SIG /* should be SIGSETJMP_SIG */ 117 bb1 ne,r4,3f /* if != SIGSETJMP_SIG, abort. */ 118 119 subu r31,r31,32 /* get a temporary stack */ 120 ld r14,r2,8 /* restore registers from the environment buffer */ 121 ld r15,r2,12 122 ld r16,r2,16 123 ld r17,r2,20 124 ld r18,r2,24 125 ld r19,r2,28 126 ld r20,r2,32 127 ld r21,r2,36 128 ld r22,r2,40 129 ld r23,r2,44 130 ld r24,r2,48 131 ld r25,r2,52 132 ld r26,r2,56 133 ld r27,r2,60 134 ld r28,r2,64 135 ld r29,r2,68 136 137 ld r4,r2,4 /* get the sinal set from env */ 138 cmp r4,r4,r0 /* if r2 == 0 then skip signal stuff */ 139 bb1 eq,r4,1f 140 141 st r2,r31,24 /* save r2 on stack (environment) */ 142 st r3,r31,28 /* save r3 on stack (return val) */ 143 bsr.n _C_LABEL(sigsetmask) /* restore the signal set */ 144 ld r2,r2,4 145 ld r2,r31,24 /* restore r2 from stack */ 146 ld r3,r31,28 /* restore r3 from stack */ 1471: ld r30,r2,72 /* restore r30 */ 148 ld r31,r2,76 /* restore r31 (sp)*/ 149 or r4,r0,1 150 st r4,r2,80 /* mark environment buffer as returned */ 151 ld r1,r2,0 /* restore r1 */ 152 bcnd.n ne0,r3,3f 153 or r2,r3,r0 154 or r2,r0,1 /* never return zero! */ 1553: jmp r1 156 1572: subu r31,r31,32 /* get a temporary stack */ 158 st r1,r31,20 /* save r1 on stack (return address) */ 159 bsr _C_LABEL(longjmperror) 160 bsr _C_LABEL(abort) /* NO RETURN */ 161 ld r1,r31,20 /* restore r1 from stack */ 162 addu r31,r31,32 /* restore the stack */ 163 jmp r1 /* this should not happen but we are prepared */ 164 165