| [444] | 1 | /* |
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| 2 | * Copyright (c) 1992, 1993 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Modified for incorporation into newlib by Joel Sherrill |
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| 6 | * (joel@OARcorp.com), On-Line Applications Research, 1995. |
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| 7 | * Did the following: |
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| 8 | * + merged in DEFS.h |
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| 9 | * + removed error check since it prevented using this setjmp |
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| 10 | * to "context switch" |
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| 11 | * + added the support for the "user label" and "register" prefix |
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| 12 | * |
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| 13 | * This software was developed by the Computer Systems Engineering group |
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| 14 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and |
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| 15 | * contributed to Berkeley. |
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| 16 | * |
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| 17 | * Redistribution and use in source and binary forms, with or without |
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| 18 | * modification, are permitted provided that the following conditions |
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| 19 | * are met: |
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| 20 | * 1. Redistributions of source code must retain the above copyright |
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| 21 | * notice, this list of conditions and the following disclaimer. |
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| 22 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 23 | * notice, this list of conditions and the following disclaimer in the |
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| 24 | * documentation and/or other materials provided with the distribution. |
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| 25 | * 3. All advertising materials mentioning features or use of this software |
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| 26 | * must display the following acknowledgement: |
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| 27 | * This product includes software developed by the University of |
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| 28 | * California, Berkeley and its contributors. |
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| 29 | * 4. Neither the name of the University nor the names of its contributors |
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| 30 | * may be used to endorse or promote products derived from this software |
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| 31 | * without specific prior written permission. |
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| 32 | * |
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| 33 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 34 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 35 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 36 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 37 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 38 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 39 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 41 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 42 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 43 | * SUCH DAMAGE. |
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| 44 | * |
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| 45 | * from: $Header$ |
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| 46 | */ |
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| 47 | |
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| 48 | #if defined(LIBC_SCCS) && !defined(lint) |
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| 49 | .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" |
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| 50 | #endif /* LIBC_SCCS and not lint */ |
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| 51 | |
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| 52 | /* |
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| 53 | * Recent versions of GNU cpp define variables which indicate the |
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| 54 | * need for underscores and percents. If not using GNU cpp or |
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| 55 | * the version does not support this, then you will obviously |
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| 56 | * have to define these as appropriate. |
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| 57 | */ |
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| 58 | |
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| 59 | #ifndef __USER_LABEL_PREFIX__ |
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| 60 | #define __USER_LABEL_PREFIX__ _ |
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| 61 | #endif |
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| 62 | |
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| 63 | #ifndef __REGISTER_PREFIX__ |
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| 64 | #define __REGISTER_PREFIX__ |
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| 65 | #endif |
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| 66 | |
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| 67 | /* ANSI concatenation macros. */ |
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| 68 | |
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| 69 | #define CONCAT1(a, b) CONCAT2(a, b) |
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| 70 | #define CONCAT2(a, b) a ## b |
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| 71 | |
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| 72 | /* Use the right prefix for global labels. */ |
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| 73 | |
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| 74 | #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) |
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| 75 | |
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| 76 | /********************************************************************* |
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| 77 | ********************************************************************* |
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| 78 | * Contents of DEFS.h * |
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| 79 | ********************************************************************* |
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| 80 | *********************************************************************/ |
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| 81 | |
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| 82 | #ifdef PROF |
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| 83 | #define ENTRY(x) \ |
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| 84 | .align 4; .globl SYM(x); .proc 1; SYM(x):; .data; .align 4; 1: .long 0; \ |
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| 85 | .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \ |
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| 86 | or %lo(1b),%o0,%o0; restore |
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| 87 | #else |
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| 88 | #define ENTRY(x) \ |
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| 89 | .align 4; .globl SYM(x); .proc 1; SYM(x): |
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| 90 | #endif |
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| 91 | |
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| 92 | |
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| 93 | |
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| 94 | /********************************************************************* |
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| 95 | ********************************************************************* |
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| 96 | * END of DEFS.h * |
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| 97 | ********************************************************************* |
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| 98 | *********************************************************************/ |
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| 99 | |
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| 100 | |
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| 101 | /* |
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| 102 | * C library -- _setjmp, _longjmp |
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| 103 | * |
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| 104 | * _longjmp(a,v) |
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| 105 | * will generate a "return(v?v:1)" from |
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| 106 | * the last call to |
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| 107 | * _setjmp(a) |
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| 108 | * by unwinding the call stack. |
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| 109 | * The previous signal state is NOT restored. |
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| 110 | */ |
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| 111 | |
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| 112 | |
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| 113 | /* #include "DEFS.h" */ |
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| 114 | |
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| 115 | ENTRY(setjmp) |
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| 116 | ENTRY(_setjmp) |
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| 117 | st %sp, [%o0] /* caller's stack pointer */ |
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| 118 | st %i7, [%o0+4] /* caller's return pc */ |
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| 119 | st %fp, [%o0+8] /* store caller's frame pointer */ |
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| 120 | st %o7, [%o0+12] |
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| 121 | retl |
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| 122 | clr %o0 ! return 0 |
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| 123 | |
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| 124 | ENTRY(longjmp) |
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| 125 | ENTRY(_longjmp) |
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| 126 | ta 0x03 /* flush registers */ |
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| 127 | addcc %o1, %g0, %g1 ! compute v ? v : 1 in a global register |
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| 128 | be,a 0f |
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| 129 | mov 1, %g1 |
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| 130 | 0: |
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| 131 | ld [%o0], %sp /* caller's stack pointer */ |
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| 132 | |
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| 133 | ldd [%sp], %l0 |
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| 134 | ldd [%sp+8], %l2 |
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| 135 | ldd [%sp+16], %l4 |
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| 136 | ldd [%sp+24], %l6 |
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| 137 | |
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| 138 | ldd [%sp+32], %i0 |
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| 139 | ldd [%sp+40], %i2 |
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| 140 | ldd [%sp+48], %i4 |
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| 141 | |
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| 142 | ld [%o0+4], %i7 /* caller's return pc */ |
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| 143 | ld [%o0+8], %fp /* caller's frame pointer */ |
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| 144 | ld [%o0+12], %o7 |
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| 145 | |
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| 146 | jmp %o7 + 8 ! success, return %g1 |
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| 147 | mov %g1, %o0 |
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| 148 | |
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