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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