1 | /* |
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2 | * Implementation of hooks for the CYGNUS newlib libc |
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3 | * These hooks set things up so that: |
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4 | * + '_REENT' is switched at task switch time. |
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5 | * |
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6 | * COPYRIGHT (c) 1994 by Division Incorporated |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * $Id$ |
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13 | * |
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14 | */ |
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15 | |
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16 | #if HAVE_CONFIG_H |
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17 | #include "config.h" |
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18 | #endif |
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19 | |
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20 | #define __RTEMS_VIOLATE_KERNEL_VISIBILITY__ |
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21 | #include <rtems.h> |
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22 | |
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23 | #if defined(RTEMS_NEWLIB) |
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24 | #include <rtems/libcsupport.h> |
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25 | |
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26 | /* Since we compile with strict ANSI we need to undef it to get |
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27 | * prototypes for extensions |
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28 | */ |
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29 | #undef __STRICT_ANSI__ |
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30 | |
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31 | #include <stdlib.h> /* for free() */ |
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32 | #include <string.h> /* for memset() */ |
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33 | |
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34 | #include <sys/reent.h> /* for extern of _REENT (aka _impure_ptr) */ |
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35 | #include <errno.h> |
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36 | |
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37 | #include <stdio.h> |
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38 | |
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39 | int _fwalk(struct _reent *ptr, int (*function) (FILE *) ); |
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40 | |
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41 | /* do we think we are reentrant? */ |
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42 | extern int libc_reentrant; |
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43 | extern struct _reent * const _global_impure_ptr __ATTRIBUTE_IMPURE_PTR__; |
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44 | |
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45 | /* |
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46 | * CYGNUS newlib routine that does atexit() processing and flushes |
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47 | * stdio streams |
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48 | * undocumented |
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49 | */ |
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50 | |
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51 | extern void _wrapup_reent(struct _reent *); |
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52 | extern void _reclaim_reent(struct _reent *); |
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53 | |
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54 | void libc_wrapup(void) |
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55 | { |
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56 | /* |
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57 | * In case RTEMS is already down, don't do this. It could be |
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58 | * dangerous. |
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59 | */ |
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60 | |
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61 | if (!_System_state_Is_up(_System_state_Get())) |
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62 | return; |
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63 | |
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64 | /* |
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65 | * This was already done if the user called exit() directly . |
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66 | _wrapup_reent(0); |
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67 | */ |
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68 | |
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69 | if (_REENT != _global_impure_ptr) { |
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70 | _wrapup_reent(_global_impure_ptr); |
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71 | #if 0 |
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72 | /* Don't reclaim this one, just in case we do printfs |
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73 | * on the way out to ROM. |
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74 | */ |
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75 | _reclaim_reent(&libc_global_reent); |
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76 | #endif |
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77 | _REENT = _global_impure_ptr; |
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78 | } |
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79 | |
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80 | /* |
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81 | * Try to drain output buffers. |
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82 | * |
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83 | * Should this be changed to do *all* file streams? |
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84 | * _fwalk (_REENT, fclose); |
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85 | */ |
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86 | |
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87 | fclose (stdin); |
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88 | fclose (stdout); |
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89 | fclose (stderr); |
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90 | } |
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91 | |
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92 | /* |
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93 | * Function: _exit |
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94 | * Created: 94/12/10 |
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95 | * |
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96 | * Description: |
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97 | * Called from exit() after it does atexit() processing and stdio fflush's |
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98 | * |
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99 | * called from bottom of exit() to really delete the task. |
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100 | * If we are using reentrant libc, then let the delete extension |
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101 | * do all the work, otherwise if a shutdown is in progress, |
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102 | * then just do it. |
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103 | * |
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104 | * Parameters: |
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105 | * exit status |
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106 | * |
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107 | * Returns: |
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108 | * does not return |
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109 | * |
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110 | * Side Effects: |
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111 | * |
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112 | * Notes: |
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113 | * |
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114 | * |
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115 | * Deficiencies/ToDo: |
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116 | * |
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117 | * |
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118 | */ |
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119 | |
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120 | #include <unistd.h> |
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121 | |
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122 | /* FIXME: These defines are a blatant hack */ |
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123 | #define EXIT_SYMBOL _exit |
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124 | |
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125 | #if defined(__AVR__) |
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126 | #undef __USE_INIT_FINI__ |
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127 | #endif |
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128 | #if defined(__USE_INIT_FINI__) |
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129 | #if defined(__m32r__) |
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130 | #define FINI_SYMBOL __fini |
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131 | #elif defined(__ARM_EABI__) |
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132 | #define FINI_SYMBOL __libc_fini_array |
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133 | #else |
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134 | #define FINI_SYMBOL _fini |
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135 | #endif |
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136 | |
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137 | extern void FINI_SYMBOL( void ); |
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138 | #endif |
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139 | |
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140 | void EXIT_SYMBOL(int status) |
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141 | { |
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142 | /* |
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143 | * If the toolset uses init/fini sections, then we need to |
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144 | * run the global destructors now. |
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145 | */ |
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146 | #if defined(FINI_SYMBOL) |
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147 | FINI_SYMBOL(); |
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148 | #endif |
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149 | |
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150 | /* |
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151 | * We need to do the exit processing on the global reentrancy structure. |
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152 | * This has already been done on the per task reentrancy structure |
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153 | * associated with this task. |
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154 | */ |
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155 | |
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156 | libc_wrapup(); |
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157 | rtems_shutdown_executive(status); |
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158 | for (;;) ; /* to avoid warnings */ |
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159 | } |
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160 | |
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161 | |
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162 | #endif |
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