root / prex-0.9.0 / usr / arch / arm / setjmp.S @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */ |
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2 | |||
3 | /* |
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4 | * Copyright (c) 1997 Mark Brinicombe |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * 3. All advertising materials mentioning features or use of this software |
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16 | * must display the following acknowledgement: |
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17 | * This product includes software developed by Mark Brinicombe |
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18 | * 4. Neither the name of the University nor the names of its contributors |
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19 | * may be used to endorse or promote products derived from this software |
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20 | * without specific prior written permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 | * SUCH DAMAGE. |
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33 | */ |
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34 | |||
35 | #include <machine/asm.h> |
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36 | #include <machine/setjmp.h> |
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37 | |||
38 | /* |
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39 | * C library -- setjmp, longjmp |
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40 | * |
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41 | * longjmp(a,v) |
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42 | * will generate a "return(v)" from the last call to |
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43 | * setjmp(a) |
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44 | * by restoring registers from the stack. |
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45 | * The previous signal state is restored. |
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46 | */ |
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47 | |||
48 | ENTRY(setjmp) |
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49 | /* Block all signals and retrieve the old signal mask */ |
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50 | stmfd sp!, {r0, r14} |
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51 | mov r0, #0x00000000 |
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52 | |||
53 | bl PIC_SYM(_C_LABEL(sigblock), PLT) |
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54 | mov r1, r0 |
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55 | |||
56 | ldmfd sp!, {r0, r14} |
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57 | |||
58 | /* Store signal mask */ |
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59 | str r1, [r0, #((25-13) * 4)] |
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60 | |||
61 | ldr r1, .Lsetjmp_magic |
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62 | str r1, [r0], #4 |
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63 | |||
64 | #if 0 /* PREX */ |
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65 | #ifdef SOFTFLOAT |
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66 | add r0, r0, #52 |
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67 | #else |
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68 | /* Store fp registers */ |
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69 | sfm f4, 4, [r0], #48 |
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70 | /* Store fpsr */ |
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71 | rfs r1 |
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72 | str r1, [r0], #0x0004 |
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73 | #endif /*SOFTFLOAT*/ |
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74 | #endif |
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75 | /* Store integer registers */ |
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76 | stmia r0, {r4-r14} |
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77 | mov r0, #0x00000000 |
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78 | mov r15, r14 |
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79 | |||
80 | .Lsetjmp_magic: |
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81 | .word _JB_MAGIC_SETJMP |
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82 | |||
83 | |||
84 | ENTRY(longjmp) |
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85 | ldr r2, .Lsetjmp_magic |
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86 | ldr r3, [r0] |
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87 | teq r2, r3 |
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88 | bne botch |
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89 | |||
90 | /* Fetch signal mask */ |
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91 | ldr r2, [r0, #((25-13) * 4)] |
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92 | |||
93 | /* Set signal mask */ |
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94 | stmfd sp!, {r0, r1, r14} |
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95 | sub sp, sp, #4 /* align the stack */ |
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96 | |||
97 | mov r0, r2 |
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98 | bl PIC_SYM(_C_LABEL(sigsetmask), PLT) |
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99 | |||
100 | add sp, sp, #4 /* unalign the stack */ |
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101 | ldmfd sp!, {r0, r1, r14} |
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102 | |||
103 | add r0, r0, #4 |
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104 | #if 0 /* PREX */ |
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105 | #ifdef SOFTFLOAT |
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106 | add r0, r0, #52 |
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107 | #else |
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108 | /* Restore fp registers */ |
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109 | lfm f4, 4, [r0], #48 |
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110 | /* Restore FPSR */ |
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111 | ldr r4, [r0], #0x0004 |
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112 | wfs r4 |
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113 | #endif /* SOFTFLOAT */ |
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114 | #endif |
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115 | /* Restore integer registers */ |
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116 | ldmia r0, {r4-r14} |
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117 | |||
118 | /* Validate sp and r14 */ |
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119 | teq sp, #0 |
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120 | teqne r14, #0 |
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121 | beq botch |
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122 | |||
123 | /* Set return value */ |
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124 | |||
125 | mov r0, r1 |
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126 | teq r0, #0x00000000 |
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127 | moveq r0, #0x00000001 |
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128 | #ifdef __ARM_26__ |
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129 | mov r15, r14 |
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130 | #else |
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131 | mov r15, r14 |
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132 | #endif |
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133 | |||
134 | /* validation failed, die die die. */ |
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135 | botch: |
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136 | #if 0 /* PREX */ |
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137 | bl PIC_SYM(_C_LABEL(longjmperror), PLT) |
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138 | #endif |
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139 | bl PIC_SYM(_C_LABEL(abort), PLT) |
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140 | b . - 8 /* Cannot get here */ |