setjmp.S revision 1.6
1/* $OpenBSD: setjmp.S,v 1.6 2003/06/02 20:18:30 millert Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <machine/asm.h> 37#define _LOCORE 38#include <machine/frame.h> 39#undef _LOCORE 40 41#if defined(LIBC_SCCS) && !defined(lint) 42 .text 43 .asciz "$OpenBSD: setjmp.S,v 1.6 2003/06/02 20:18:30 millert Exp $" 44 .align 4 45#endif /* LIBC_SCCS and not lint */ 46 47/* 48 * C library -- setjmp, longjmp 49 * 50 * longjmp(a,v) 51 * will generate a "return(v)" from 52 * the last call to 53 * setjmp(a) 54 * by restoring registers from the stack, 55 * and a struct sigcontext, see <signal.h> 56 */ 57 58ENTRY(sigsetjmp, 64) 59 sub,<> %r0, %arg1, %r0 60 b,n _setjmp 61 nop 62 63 stw %arg1, 44(%arg0) ; last of reserved words 64 65ALTENTRY(setjmp) 66 stw %rp, HPPA_FRAME_CRP(%sp) 67 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 68 69 copy %r3, %r1 70 copy %sp, %r3 71 stw,ma %r1, HPPA_FRAME_SIZE(%sp) 72 73 bl sigblock, %rp 74 copy %r0, %arg0 75 76 ldo HPPA_FRAME_SIZE(%r3), %sp 77 ldw,mb -HPPA_FRAME_SIZE(%sp),%r3 78 ldw HPPA_FRAME_CRP(%sp), %rp 79 ldw HPPA_FRAME_ARG(0)(%sp), %arg0 80 81 stw %r0, 0(%arg0) ; no onstack 82 b _setjmp$dosaves 83 stw %ret0, 4(%arg0) ; mask 84 85ALTENTRY(_setjmp) 86 /* A sigcontext is at the beginning of our jmp_buf. */ 87 stw %r0, 0(%arg0) ; no onstack 88 stw %r0, 4(%arg0) ; mask 89_setjmp$dosaves 90 stw %r0, 8(%arg0) ; set sc.sc_ps 91 stw %sp, 12(%arg0) ; sc.sc_sp = %sp 92 stw %r0, 16(%arg0) ; sc.sc_fp 93 ldo 4(%rp), %r1 94 stw %rp, 20(%arg0) ; sc.sc_pcoqh = %rp 95 stw %r1, 24(%arg0) ; sc.sc_pcoqt = %rp + 4 96 97 /* We store all callee-saved registers after the sigcontext. */ 98 ldo 48(%arg0), %r1 ; offset to after sc 99 stwm %r3, 4(%r1) 100 stwm %r4, 4(%r1) 101 stwm %r5, 4(%r1) 102 stwm %r6, 4(%r1) 103 stwm %r7, 4(%r1) 104 stwm %r8, 4(%r1) 105 stwm %r9, 4(%r1) 106 stwm %r10, 4(%r1) 107 stwm %r11, 4(%r1) 108 stwm %r12, 4(%r1) 109 stwm %r13, 4(%r1) 110 stwm %r14, 4(%r1) 111 stwm %r15, 4(%r1) 112 stwm %r16, 4(%r1) 113 stwm %r17, 4(%r1) 114 stwm %r18, 4(%r1) 115 116 /* Return 0. */ 117 bv %r0(%rp) 118 copy %r0, %ret0 119EXIT(_setjmp) 120 121ENTRY(siglongjmp,64) 122 /* XXX have to dup this from below */ 123 sub,>> %sp, %arg0, %r0 /* botch if jbuf was on stack */ 124 bl,n longjmperror, %rp 125 nop 126 ldw 16(%arg0), %r1 /* botch if it's a real signal frame */ 127 add,= %r0, %r1, %r0 128 bl,n longjmperror, %rp 129 nop 130 131 ldw 44(%arg0), %arg2 132 sub,<> %r0, %arg2, %r0 133 b _longjmp 134 nop 135 136ALTENTRY(longjmp) 137 /* XXX have to dup this from below */ 138 sub,>> %sp, %arg0, %r0 /* botch if jbuf was on stack */ 139 bl,n longjmperror, %rp 140 nop 141 ldw 16(%arg0), %r1 /* botch if it's a real signal frame */ 142 add,= %r0, %r1, %r0 143 bl,n longjmperror, %rp 144 nop 145 146 stw %rp, HPPA_FRAME_CRP(%sp) 147 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 148 stw %arg1, HPPA_FRAME_ARG(1)(%sp) 149 150 copy %r3, %r1 151 copy %sp, %r3 152 stw,ma %r1, HPPA_FRAME_SIZE(%sp) 153 154 bl sigsetmask, %rp 155 ldw 4(%arg0), %arg0 156 157 ldo HPPA_FRAME_SIZE(%r3), %sp 158 ldw,mb -HPPA_FRAME_SIZE(%sp),%r3 159 ldw HPPA_FRAME_CRP(%sp), %rp 160 ldw HPPA_FRAME_ARG(0)(%sp), %arg0 161 b _longjmp$restores 162 ldw HPPA_FRAME_ARG(1)(%sp), %arg1 163 164ALTENTRY(_longjmp) 165 sub,>> %sp, %arg0, %r0 /* botch if jbuf was on stack */ 166 bl,n longjmperror, %rp 167 nop 168 ldw 16(%arg0), %r1 /* botch if it's a real signal frame */ 169 add,= %r0, %r1, %r0 170 bl,n longjmperror, %rp 171 nop 172 173_longjmp$restores 174 /* restore callee-saved registers */ 175 ldo 48(%arg0), %r1 176 ldwm 4(%r1), %r3 177 ldwm 4(%r1), %r4 178 ldwm 4(%r1), %r5 179 ldwm 4(%r1), %r6 180 ldwm 4(%r1), %r7 181 ldwm 4(%r1), %r8 182 ldwm 4(%r1), %r9 183 ldwm 4(%r1), %r10 184 ldwm 4(%r1), %r11 185 ldwm 4(%r1), %r12 186 ldwm 4(%r1), %r13 187 ldwm 4(%r1), %r14 188 ldwm 4(%r1), %r15 189 ldwm 4(%r1), %r16 190 ldwm 4(%r1), %r17 191 ldwm 4(%r1), %r18 192 193 /* restore the rest */ 194 ldw 12(%arg0), %sp 195 ldw 20(%arg0), %rp /* check the priv level */ 196 sub,<> %arg1, %r0, %r0 197 ldo 1(%arg1), %arg1 198 bv %r0(%rp) 199 copy %arg1, %ret0 200EXIT(_longjmp) 201 202 .end 203