1 | /* |
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2 | * @(#)monitor.c 1.18 - 95/08/02 |
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3 | * |
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4 | * |
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5 | * RTEMS monitor main body |
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6 | * |
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7 | * TODO: |
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8 | * add stuff to RTEMS api |
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9 | * rtems_get_name(id) |
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10 | * rtems_get_type(id) |
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11 | * rtems_build_id(node, type, num) |
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12 | * Add a command to dump out info about an arbitrary id when |
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13 | * types are added to id's |
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14 | * rtems> id idnum |
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15 | * idnum: node n, object: whatever, id: whatever |
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16 | * allow id's to be specified as n:t:id, where 'n:t' is optional |
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17 | * should have a separate monitor FILE stream (ala the debugger) |
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18 | * remote request/response stuff should be cleaned up |
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19 | * maybe we can use real rpc?? |
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20 | * |
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21 | * $Id$ |
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22 | */ |
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23 | |
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24 | #include <rtems.h> |
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25 | |
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26 | #include <stdio.h> |
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27 | #include <string.h> |
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28 | #include <stdlib.h> |
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29 | #include <unistd.h> |
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30 | |
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31 | #include "monitor.h" |
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32 | |
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33 | /* set by trap handler */ |
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34 | extern rtems_tcb *debugger_interrupted_task; |
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35 | extern rtems_context *debugger_interrupted_task_context; |
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36 | extern rtems_unsigned32 debugger_trap; |
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37 | |
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38 | /* |
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39 | * Various id's for the monitor |
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40 | * They need to be public variables for access by other agencies |
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41 | * such as debugger and remote servers' |
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42 | */ |
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43 | |
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44 | rtems_id rtems_monitor_task_id; |
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45 | |
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46 | unsigned32 rtems_monitor_node; /* our node number */ |
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47 | unsigned32 rtems_monitor_default_node; /* current default for commands */ |
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48 | |
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49 | /* |
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50 | * The rtems symbol table |
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51 | */ |
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52 | |
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53 | rtems_symbol_table_t *rtems_monitor_symbols; |
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54 | |
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55 | /* |
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56 | * The top-level commands |
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57 | */ |
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58 | |
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59 | rtems_monitor_command_entry_t rtems_monitor_commands[] = { |
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60 | { "--usage--", |
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61 | "\n" |
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62 | "RTEMS monitor\n" |
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63 | "\n" |
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64 | "Commands (may be abbreviated)\n" |
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65 | "\n" |
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66 | " help -- get this message or command specific help\n" |
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67 | " pause -- pause monitor for a specified number of ticks\n" |
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68 | " exit -- invoke a fatal RTEMS error\n" |
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69 | " symbol -- show entries from symbol table\n" |
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70 | " continue -- put monitor to sleep waiting for explicit wakeup\n" |
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71 | " config -- show system configuration\n" |
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72 | " itask -- list init tasks\n" |
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73 | " mpci -- list mpci config\n" |
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74 | " task -- show task information\n" |
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75 | " queue -- show message queue information\n" |
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76 | " extension -- user extensions\n" |
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77 | " driver -- show information about named drivers\n" |
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78 | " object -- generic object information\n" |
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79 | " node -- specify default node for commands that take id's\n" |
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80 | #ifdef CPU_INVOKE_DEBUGGER |
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81 | " debugger -- invoke system debugger\n" |
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82 | #endif |
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83 | , |
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84 | 0, |
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85 | 0, |
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86 | (unsigned32) rtems_monitor_commands, |
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87 | }, |
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88 | { "config", |
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89 | "config\n" |
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90 | " Show the system configuration.\n", |
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91 | 0, |
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92 | rtems_monitor_object_cmd, |
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93 | RTEMS_OBJECT_CONFIG, |
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94 | }, |
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95 | { "itask", |
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96 | "itask\n" |
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97 | " List init tasks for the system\n", |
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98 | 0, |
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99 | rtems_monitor_object_cmd, |
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100 | RTEMS_OBJECT_INIT_TASK, |
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101 | }, |
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102 | { "mpci", |
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103 | "mpci\n" |
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104 | " Show the MPCI system configuration, if configured.\n", |
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105 | 0, |
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106 | rtems_monitor_object_cmd, |
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107 | RTEMS_OBJECT_MPCI, |
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108 | }, |
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109 | { "pause", |
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110 | "pause [ticks]\n" |
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111 | " monitor goes to \"sleep\" for specified ticks (default is 1)\n" |
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112 | " monitor will resume at end of period or if explicitly awakened\n", |
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113 | 0, |
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114 | rtems_monitor_pause_cmd, |
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115 | 0, |
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116 | }, |
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117 | { "continue", |
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118 | "continue\n" |
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119 | " put the monitor to sleep waiting for an explicit wakeup from the\n" |
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120 | " program running.\n", |
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121 | 0, |
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122 | rtems_monitor_continue_cmd, |
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123 | 0, |
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124 | }, |
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125 | { "go", |
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126 | "go\n" |
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127 | " Alias for 'continue'\n", |
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128 | 0, |
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129 | rtems_monitor_continue_cmd, |
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130 | 0, |
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131 | }, |
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132 | { "node", |
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133 | "node [ node number ]\n" |
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134 | " Specify default node number for commands that take id's\n", |
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135 | 0, |
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136 | rtems_monitor_node_cmd, |
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137 | 0, |
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138 | }, |
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139 | { "symbol", |
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140 | "symbol [ symbolname [symbolname ... ] ]\n" |
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141 | " display value associated with specified symbol.\n" |
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142 | " Defaults to displaying all known symbols.\n", |
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143 | 0, |
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144 | rtems_monitor_symbol_cmd, |
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145 | (unsigned32) &rtems_monitor_symbols, |
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146 | }, |
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147 | { "extension", |
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148 | "extension [id [id ...] ]\n" |
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149 | " display information about specified extensions.\n" |
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150 | " Default is to display information about all extensions on this node\n", |
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151 | 0, |
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152 | rtems_monitor_object_cmd, |
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153 | RTEMS_OBJECT_EXTENSION, |
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154 | }, |
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155 | { "task", |
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156 | "task [id [id ...] ]\n" |
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157 | " display information about the specified tasks.\n" |
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158 | " Default is to display information about all tasks on this node\n", |
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159 | 0, |
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160 | rtems_monitor_object_cmd, |
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161 | RTEMS_OBJECT_TASK, |
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162 | }, |
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163 | { "queue", |
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164 | "queue [id [id ... ] ]\n" |
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165 | " display information about the specified message queues\n" |
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166 | " Default is to display information about all queues on this node\n", |
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167 | 0, |
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168 | rtems_monitor_object_cmd, |
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169 | RTEMS_OBJECT_QUEUE, |
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170 | }, |
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171 | { "object", |
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172 | "object [id [id ...] ]\n" |
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173 | " display information about specified RTEMS objects.\n" |
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174 | " Object id's must include 'type' information.\n" |
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175 | " (which may normally be defaulted)\n", |
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176 | 0, |
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177 | rtems_monitor_object_cmd, |
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178 | RTEMS_OBJECT_INVALID, |
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179 | }, |
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180 | { "driver", |
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181 | "driver [ major [ major ... ] ]\n" |
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182 | " Display the RTEMS device driver table.\n", |
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183 | 0, |
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184 | rtems_monitor_object_cmd, |
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185 | RTEMS_OBJECT_DRIVER, |
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186 | }, |
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187 | { "dname", |
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188 | "dname\n" |
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189 | " Displays information about named drivers.\n", |
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190 | 0, |
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191 | rtems_monitor_object_cmd, |
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192 | RTEMS_OBJECT_DNAME, |
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193 | }, |
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194 | { "exit", |
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195 | "exit [status]\n" |
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196 | " Invoke 'rtems_fatal_error_occurred' with 'status'\n" |
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197 | " (default is RTEMS_SUCCESSFUL)\n", |
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198 | 0, |
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199 | rtems_monitor_fatal_cmd, |
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200 | RTEMS_SUCCESSFUL, |
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201 | }, |
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202 | { "fatal", |
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203 | "fatal [status]\n" |
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204 | " 'exit' with fatal error; default error is RTEMS_TASK_EXITTED\n", |
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205 | 0, |
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206 | rtems_monitor_fatal_cmd, |
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207 | RTEMS_TASK_EXITTED, /* exit value */ |
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208 | }, |
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209 | { "quit", |
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210 | "quit [status]\n" |
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211 | " Alias for 'exit'\n", |
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212 | 0, |
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213 | rtems_monitor_fatal_cmd, |
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214 | RTEMS_SUCCESSFUL, /* exit value */ |
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215 | }, |
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216 | { "help", |
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217 | "help [ command [ command ] ]\n" |
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218 | " provide information about commands\n" |
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219 | " Default is show basic command summary.\n", |
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220 | 0, |
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221 | rtems_monitor_help_cmd, |
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222 | (unsigned32) rtems_monitor_commands, |
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223 | }, |
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224 | #ifdef CPU_INVOKE_DEBUGGER |
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225 | { "debugger", |
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226 | "debugger\n" |
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227 | " Enter the debugger, if possible.\n" |
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228 | " A continue from the debugger will return to the monitor.\n", |
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229 | 0, |
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230 | CPU_INVOKE_DEBUGGER, |
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231 | 0, |
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232 | }, |
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233 | #endif |
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234 | { 0, 0, 0, 0, 0 }, |
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235 | }; |
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236 | |
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237 | |
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238 | rtems_status_code |
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239 | rtems_monitor_suspend(rtems_interval timeout) |
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240 | { |
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241 | rtems_event_set event_set; |
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242 | rtems_status_code status; |
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243 | |
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244 | status = rtems_event_receive(MONITOR_WAKEUP_EVENT, |
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245 | RTEMS_DEFAULT_OPTIONS, |
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246 | timeout, |
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247 | &event_set); |
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248 | return status; |
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249 | } |
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250 | |
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251 | void |
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252 | rtems_monitor_wakeup(void) |
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253 | { |
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254 | rtems_status_code status; |
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255 | |
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256 | status = rtems_event_send(rtems_monitor_task_id, MONITOR_WAKEUP_EVENT); |
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257 | } |
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258 | |
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259 | |
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260 | void |
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261 | rtems_monitor_pause_cmd( |
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262 | int argc, |
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263 | char **argv, |
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264 | unsigned32 command_arg, |
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265 | boolean verbose |
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266 | ) |
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267 | { |
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268 | if (argc == 1) |
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269 | rtems_monitor_suspend(1); |
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270 | else |
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271 | rtems_monitor_suspend(strtoul(argv[1], 0, 0)); |
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272 | } |
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273 | |
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274 | void |
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275 | rtems_monitor_fatal_cmd( |
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276 | int argc, |
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277 | char **argv, |
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278 | unsigned32 command_arg, |
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279 | boolean verbose |
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280 | ) |
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281 | { |
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282 | if (argc == 1) |
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283 | rtems_fatal_error_occurred(command_arg); |
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284 | else |
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285 | rtems_fatal_error_occurred(strtoul(argv[1], 0, 0)); |
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286 | } |
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287 | |
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288 | void |
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289 | rtems_monitor_continue_cmd( |
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290 | int argc, |
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291 | char **argv, |
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292 | unsigned32 command_arg, |
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293 | boolean verbose |
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294 | ) |
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295 | { |
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296 | rtems_monitor_suspend(RTEMS_NO_TIMEOUT); |
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297 | } |
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298 | |
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299 | |
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300 | void |
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301 | rtems_monitor_node_cmd( |
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302 | int argc, |
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303 | char **argv, |
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304 | unsigned32 command_arg, |
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305 | boolean verbose |
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306 | ) |
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307 | { |
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308 | unsigned32 new_node = rtems_monitor_default_node; |
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309 | |
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310 | switch (argc) |
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311 | { |
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312 | case 1: /* no node, just set back to ours */ |
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313 | new_node = rtems_monitor_node; |
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314 | break; |
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315 | |
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316 | case 2: |
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317 | new_node = strtoul(argv[1], 0, 0); |
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318 | break; |
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319 | |
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320 | default: |
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321 | printf("invalid syntax, try 'help node'\n"); |
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322 | break; |
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323 | } |
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324 | |
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325 | if ((new_node >= 1) && (new_node <= _Configuration_MP_table->maximum_nodes)) |
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326 | rtems_monitor_default_node = new_node; |
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327 | } |
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328 | |
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329 | |
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330 | /* |
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331 | * Function: rtems_monitor_symbols_loadup |
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332 | * |
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333 | * Description: |
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334 | * Create and load the monitor's symbol table. |
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335 | * We are reading the output format of 'gnm' which looks like this: |
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336 | * |
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337 | * 400a7068 ? _Rate_monotonic_Information |
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338 | * 400a708c ? _Thread_Dispatch_disable_level |
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339 | * 400a7090 ? _Configuration_Table |
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340 | * |
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341 | * |
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342 | * We ignore the type field. |
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343 | * |
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344 | * Parameters: |
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345 | * |
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346 | * |
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347 | * Returns: |
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348 | * |
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349 | * |
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350 | * Side Effects: |
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351 | * Creates and fills in 'rtems_monitor_symbols' table |
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352 | * |
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353 | * Notes: |
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354 | * |
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355 | * |
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356 | * Deficiencies/ToDo: |
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357 | * Someday this should know BFD |
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358 | * Maybe we could get objcopy to just copy the symbol areas |
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359 | * and copy that down. |
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360 | * |
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361 | */ |
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362 | |
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363 | void |
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364 | rtems_monitor_symbols_loadup(void) |
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365 | { |
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366 | FILE *fp; |
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367 | char buffer[128]; |
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368 | |
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369 | if (rtems_monitor_symbols) |
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370 | rtems_symbol_table_destroy(rtems_monitor_symbols); |
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371 | |
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372 | rtems_monitor_symbols = rtems_symbol_table_create(10); |
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373 | if (rtems_monitor_symbols == 0) |
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374 | return; |
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375 | |
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376 | #ifdef simhppa |
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377 | fp = fdopen(8, "r"); /* don't ask; don't tell */ |
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378 | #else |
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379 | fp = fopen("symbols", "r"); |
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380 | #endif |
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381 | |
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382 | if (fp == 0) |
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383 | return; |
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384 | |
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385 | while (fgets(buffer, sizeof(buffer) - 1, fp)) |
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386 | { |
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387 | char *symbol; |
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388 | char *value; |
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389 | char *ignored_type; |
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390 | |
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391 | value = strtok(buffer, " \t\n"); |
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392 | ignored_type = strtok(0, " \t\n"); |
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393 | symbol = strtok(0, " \t\n"); |
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394 | |
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395 | if (symbol && ignored_type && value) |
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396 | { |
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397 | rtems_symbol_t *sp; |
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398 | sp = rtems_symbol_create(rtems_monitor_symbols, |
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399 | symbol, |
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400 | (rtems_unsigned32) strtoul(value, 0, 16)); |
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401 | if (sp == 0) |
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402 | { |
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403 | printf("could not define symbol '%s'\n", symbol); |
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404 | goto done; |
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405 | } |
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406 | } |
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407 | else |
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408 | { |
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409 | printf("parsing error on '%s'\n", buffer); |
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410 | goto done; |
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411 | } |
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412 | } |
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413 | |
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414 | done: |
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415 | } |
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416 | |
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417 | |
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418 | /* |
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419 | * Main monitor command loop |
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420 | */ |
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421 | |
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422 | void |
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423 | rtems_monitor_task( |
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424 | rtems_task_argument monitor_flags |
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425 | ) |
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426 | { |
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427 | rtems_tcb *debugee = 0; |
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428 | rtems_context *rp; |
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429 | rtems_context_fp *fp; |
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430 | char command_buffer[513]; |
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431 | int argc; |
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432 | char *argv[64]; |
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433 | boolean verbose = FALSE; |
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434 | |
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435 | if (monitor_flags & RTEMS_MONITOR_SUSPEND) |
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436 | (void) rtems_monitor_suspend(RTEMS_NO_TIMEOUT); |
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437 | |
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438 | for (;;) |
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439 | { |
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440 | extern rtems_tcb * _Thread_Executing; |
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441 | rtems_monitor_command_entry_t *command; |
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442 | |
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443 | debugee = _Thread_Executing; |
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444 | rp = &debugee->Registers; |
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445 | fp = (rtems_context_fp *) debugee->fp_context; /* possibly 0 */ |
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446 | |
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447 | if (0 == rtems_monitor_command_read(command_buffer, &argc, argv)) |
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448 | continue; |
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449 | if ((command = rtems_monitor_command_lookup(rtems_monitor_commands, |
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450 | argc, |
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451 | argv)) == 0) |
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452 | continue; |
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453 | |
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454 | command->command_function(argc, argv, command->command_arg, verbose); |
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455 | |
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456 | fflush(stdout); |
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457 | } |
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458 | } |
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459 | |
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460 | |
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461 | void |
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462 | rtems_monitor_kill(void) |
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463 | { |
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464 | if (rtems_monitor_task_id) |
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465 | rtems_task_delete(rtems_monitor_task_id); |
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466 | rtems_monitor_task_id = 0; |
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467 | |
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468 | rtems_monitor_server_kill(); |
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469 | } |
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470 | |
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471 | void |
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472 | rtems_monitor_init( |
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473 | unsigned32 monitor_flags |
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474 | ) |
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475 | { |
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476 | rtems_status_code status; |
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477 | |
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478 | rtems_monitor_kill(); |
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479 | |
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480 | status = rtems_task_create(RTEMS_MONITOR_NAME, |
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481 | 1, |
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482 | 0 /* default stack */, |
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483 | RTEMS_INTERRUPT_LEVEL(0), |
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484 | RTEMS_DEFAULT_ATTRIBUTES, |
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485 | &rtems_monitor_task_id); |
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486 | if (status != RTEMS_SUCCESSFUL) |
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487 | { |
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488 | rtems_error(status, "could not create monitor task"); |
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489 | goto done; |
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490 | } |
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491 | |
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492 | rtems_monitor_node = rtems_get_node(rtems_monitor_task_id); |
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493 | rtems_monitor_default_node = rtems_monitor_node; |
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494 | |
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495 | rtems_monitor_symbols_loadup(); |
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496 | |
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497 | if (monitor_flags & RTEMS_MONITOR_GLOBAL) |
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498 | rtems_monitor_server_init(monitor_flags); |
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499 | |
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500 | /* |
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501 | * Start the monitor task itself |
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502 | */ |
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503 | |
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504 | status = rtems_task_start(rtems_monitor_task_id, |
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505 | rtems_monitor_task, |
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506 | monitor_flags); |
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507 | if (status != RTEMS_SUCCESSFUL) |
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508 | { |
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509 | rtems_error(status, "could not start monitor"); |
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510 | goto done; |
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511 | } |
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512 | |
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513 | done: |
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514 | } |
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