1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_bsd_rtems |
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5 | * |
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6 | * @brief TODO. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Dornierstr. 4 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * Redistribution and use in source and binary forms, with or without |
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19 | * modification, are permitted provided that the following conditions |
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20 | * are met: |
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21 | * 1. Redistributions of source code must retain the above copyright |
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22 | * notice, this list of conditions and the following disclaimer. |
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23 | * 2. Redistributions in binary form must reproduce the above copyright |
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24 | * notice, this list of conditions and the following disclaimer in the |
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25 | * documentation and/or other materials provided with the distribution. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #include <machine/rtems-bsd-kernel-space.h> |
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41 | #include <machine/rtems-bsd-thread.h> |
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42 | |
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43 | #include <rtems/bsd/sys/param.h> |
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44 | #include <sys/types.h> |
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45 | #include <sys/systm.h> |
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46 | #include <sys/kernel.h> |
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47 | #include <sys/proc.h> |
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48 | #include <sys/malloc.h> |
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49 | #include <rtems/bsd/sys/lock.h> |
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50 | #include <sys/mutex.h> |
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51 | |
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52 | #include <setjmp.h> |
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53 | #include <stdarg.h> |
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54 | #include <stdlib.h> |
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55 | |
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56 | #undef printf |
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57 | #include <machine/rtems-bsd-program.h> |
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58 | |
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59 | struct rtems_bsd_program_control { |
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60 | void *context; |
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61 | int exit_code; |
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62 | const char *name; |
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63 | jmp_buf return_context; |
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64 | }; |
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65 | |
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66 | int |
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67 | rtems_bsd_program_call(const char *name, int (*prog)(void *), void *context) |
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68 | { |
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69 | struct thread *td = rtems_bsd_get_curthread_or_null(); |
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70 | int exit_code = EXIT_FAILURE; |
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71 | |
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72 | if (td != NULL) { |
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73 | struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl; |
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74 | |
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75 | if (prog_ctrl == NULL) { |
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76 | prog_ctrl = malloc(sizeof(*prog_ctrl), M_TEMP, 0); |
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77 | |
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78 | if (prog_ctrl != NULL) { |
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79 | td->td_prog_ctrl = prog_ctrl; |
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80 | |
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81 | prog_ctrl->context = context; |
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82 | prog_ctrl->name = name; |
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83 | prog_ctrl->exit_code = exit_code; |
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84 | |
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85 | if (setjmp(prog_ctrl->return_context) == 0) { |
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86 | exit_code = (*prog)(context); |
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87 | } else { |
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88 | exit_code = prog_ctrl->exit_code; |
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89 | } |
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90 | |
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91 | td->td_prog_ctrl = NULL; |
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92 | free(prog_ctrl, M_TEMP); |
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93 | } else { |
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94 | errno = ENOMEM; |
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95 | } |
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96 | } else { |
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97 | panic("unexpected BSD program state"); |
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98 | } |
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99 | } else { |
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100 | errno = ENOMEM; |
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101 | } |
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102 | |
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103 | return exit_code; |
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104 | } |
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105 | |
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106 | void |
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107 | rtems_bsd_program_exit(int exit_code) |
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108 | { |
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109 | struct thread *td = rtems_bsd_get_curthread_or_null(); |
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110 | |
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111 | if (td != NULL) { |
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112 | struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl; |
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113 | |
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114 | if (prog_ctrl != NULL) { |
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115 | prog_ctrl->exit_code = exit_code; |
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116 | longjmp(prog_ctrl->return_context, 1); |
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117 | } |
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118 | } |
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119 | |
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120 | panic("unexpected BSD program exit"); |
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121 | } |
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122 | |
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123 | void |
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124 | rtems_bsd_program_error(const char *fmt, ...) |
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125 | { |
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126 | va_list list; |
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127 | va_start(list, fmt); |
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128 | vfprintf(stderr, fmt, list); |
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129 | fprintf(stderr, "\n"); |
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130 | va_end(list); |
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131 | rtems_bsd_program_exit(1); |
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132 | } |
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133 | |
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134 | const char * |
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135 | rtems_bsd_program_get_name(void) |
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136 | { |
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137 | struct thread *td = rtems_bsd_get_curthread_or_null(); |
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138 | const char *name = "?"; |
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139 | |
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140 | if (td != NULL) { |
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141 | struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl; |
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142 | |
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143 | if (prog_ctrl != NULL) { |
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144 | name = prog_ctrl->name; |
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145 | } |
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146 | } |
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147 | |
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148 | return name; |
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149 | } |
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150 | |
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151 | void * |
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152 | rtems_bsd_program_get_context(void) |
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153 | { |
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154 | struct thread *td = rtems_bsd_get_curthread_or_null(); |
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155 | void *context = NULL; |
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156 | |
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157 | if (td != NULL) { |
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158 | struct rtems_bsd_program_control *prog_ctrl = td->td_prog_ctrl; |
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159 | |
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160 | if (prog_ctrl != NULL) { |
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161 | context = prog_ctrl->context; |
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162 | } |
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163 | } |
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164 | |
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165 | return context; |
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166 | } |
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167 | |
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168 | struct main_context { |
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169 | int argc; |
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170 | char **argv; |
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171 | int (*main)(int, char **); |
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172 | }; |
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173 | |
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174 | static int |
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175 | call_main(void *ctx) |
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176 | { |
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177 | const struct main_context *mc = ctx; |
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178 | |
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179 | return (*mc->main)(mc->argc, mc->argv); |
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180 | } |
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181 | |
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182 | int |
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183 | rtems_bsd_program_call_main(const char *name, int (*main)(int, char **), |
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184 | int argc, char **argv) |
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185 | { |
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186 | struct main_context mc = { |
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187 | .argc = argc, |
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188 | .argv = argv, |
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189 | .main = main |
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190 | }; |
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191 | int exit_code; |
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192 | |
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193 | if (argv[argc] == NULL) { |
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194 | exit_code = rtems_bsd_program_call(name, call_main, &mc); |
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195 | } else { |
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196 | errno = EFAULT; |
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197 | exit_code = EXIT_FAILURE; |
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198 | } |
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199 | |
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200 | return exit_code; |
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201 | } |
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202 | |
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203 | static struct mtx program_mtx; |
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204 | |
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205 | MTX_SYSINIT(rtems_bsd_program, &program_mtx, "BSD program", MTX_DEF); |
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206 | |
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207 | void |
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208 | rtems_bsd_program_lock(void) |
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209 | { |
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210 | mtx_lock(&program_mtx); |
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211 | } |
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212 | |
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213 | void |
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214 | rtems_bsd_program_unlock(void) |
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215 | { |
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216 | mtx_unlock(&program_mtx); |
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217 | } |
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