1 | /* |
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2 | * File: symbols.c |
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3 | * |
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4 | * Description: |
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5 | * Symbol table manager for the RTEMS monitor. |
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6 | * These routines may be used by other system resources also. |
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7 | * |
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8 | * |
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9 | * TODO: |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | /* for strcasecmp in linux and solaris */ |
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15 | #if defined(__linux__) |
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16 | #include <features.h> |
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17 | #define __USE_BSD |
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18 | #endif |
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19 | #include <string.h> |
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20 | |
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21 | #define __RTEMS_VIOLATE_KERNEL_VISIBILITY__ |
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22 | #include <rtems.h> |
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23 | #include <stdio.h> |
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24 | #include <stdlib.h> |
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25 | |
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26 | #include <rtems/monitor.h> |
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27 | #include <rtems/symbols.h> |
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28 | |
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29 | |
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30 | rtems_symbol_table_t * |
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31 | rtems_symbol_table_create() |
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32 | { |
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33 | rtems_symbol_table_t *table; |
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34 | |
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35 | table = (rtems_symbol_table_t *) malloc(sizeof(rtems_symbol_table_t)); |
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36 | memset((void *) table, 0, sizeof(*table)); |
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37 | |
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38 | table->growth_factor = 30; /* 30 percent */ |
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39 | |
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40 | return table; |
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41 | } |
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42 | |
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43 | void |
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44 | rtems_symbol_table_destroy(rtems_symbol_table_t *table) |
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45 | { |
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46 | rtems_symbol_string_block_t *p, *pnext; |
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47 | |
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48 | if (table) |
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49 | { |
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50 | if (table->addresses) |
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51 | (void) free(table->addresses); |
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52 | table->addresses = 0; |
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53 | p = table->string_buffer_head; |
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54 | while (p) |
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55 | { |
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56 | pnext = p->next; |
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57 | free(p); |
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58 | p = pnext; |
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59 | } |
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60 | table->string_buffer_head = 0; |
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61 | table->string_buffer_current = 0; |
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62 | |
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63 | free(table); |
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64 | } |
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65 | } |
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66 | |
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67 | rtems_symbol_t * |
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68 | rtems_symbol_create( |
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69 | rtems_symbol_table_t *table, |
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70 | char *name, |
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71 | rtems_unsigned32 value |
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72 | ) |
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73 | { |
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74 | int symbol_length; |
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75 | size_t newsize; |
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76 | rtems_symbol_t *sp; |
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77 | |
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78 | symbol_length = strlen(name) + 1; /* include '\000' in length */ |
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79 | |
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80 | /* need to grow the table? */ |
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81 | if (table->next >= table->size) |
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82 | { |
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83 | if (table->size == 0) |
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84 | newsize = 100; |
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85 | else |
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86 | newsize = table->size + (table->size / (100 / table->growth_factor)); |
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87 | |
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88 | table->addresses = (rtems_symbol_t *) realloc((void *) table->addresses, newsize * sizeof(rtems_symbol_t)); |
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89 | if (table->addresses == 0) /* blew it; lost orig */ |
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90 | goto failed; |
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91 | table->size = newsize; |
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92 | } |
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93 | |
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94 | sp = &table->addresses[table->next]; |
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95 | sp->value = value; |
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96 | |
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97 | /* Have to add it to string pool */ |
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98 | /* need to grow pool? */ |
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99 | |
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100 | if ((table->string_buffer_head == 0) || |
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101 | (table->strings_next + symbol_length) >= SYMBOL_STRING_BLOCK_SIZE) |
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102 | { |
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103 | rtems_symbol_string_block_t *p; |
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104 | |
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105 | p = (rtems_symbol_string_block_t *) malloc(sizeof(rtems_symbol_string_block_t)); |
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106 | if (p == 0) |
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107 | goto failed; |
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108 | p->next = 0; |
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109 | if (table->string_buffer_head == 0) |
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110 | table->string_buffer_head = p; |
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111 | else |
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112 | table->string_buffer_current->next = p; |
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113 | table->string_buffer_current = p; |
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114 | |
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115 | table->strings_next = 0; |
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116 | } |
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117 | |
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118 | sp->name = table->string_buffer_current->buffer + table->strings_next; |
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119 | (void) strcpy(sp->name, name); |
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120 | |
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121 | table->strings_next += symbol_length; |
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122 | table->sorted = 0; |
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123 | table->next++; |
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124 | |
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125 | return sp; |
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126 | |
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127 | /* XXX Not sure what to do here. We've possibly destroyed the initial |
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128 | symbol table due to realloc failure */ |
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129 | failed: |
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130 | return 0; |
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131 | } |
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132 | |
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133 | /* |
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134 | * Qsort entry point for compare by address |
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135 | */ |
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136 | |
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137 | static int |
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138 | rtems_symbol_compare(const void *e1, |
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139 | const void *e2) |
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140 | { |
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141 | rtems_symbol_t *s1, *s2; |
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142 | s1 = (rtems_symbol_t *) e1; |
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143 | s2 = (rtems_symbol_t *) e2; |
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144 | |
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145 | if (s1->value < s2->value) |
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146 | return -1; |
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147 | if (s1->value > s2->value) |
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148 | return 1; |
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149 | return 0; |
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150 | } |
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151 | |
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152 | |
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153 | /* |
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154 | * Sort the symbol table using qsort |
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155 | */ |
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156 | |
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157 | static void |
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158 | rtems_symbol_sort(rtems_symbol_table_t *table) |
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159 | { |
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160 | qsort((void *) table->addresses, (size_t) table->next, |
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161 | sizeof(rtems_symbol_t), rtems_symbol_compare); |
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162 | table->sorted = 1; |
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163 | } |
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164 | |
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165 | |
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166 | /* |
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167 | * Search the symbol table by address |
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168 | * This code based on CYGNUS newlib bsearch, but changed |
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169 | * to allow for finding closest symbol <= key |
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170 | */ |
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171 | |
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172 | rtems_symbol_t * |
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173 | rtems_symbol_value_lookup( |
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174 | rtems_symbol_table_t *table, |
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175 | rtems_unsigned32 value |
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176 | ) |
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177 | { |
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178 | rtems_symbol_t *sp; |
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179 | rtems_symbol_t *base; |
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180 | rtems_symbol_t *best = 0; |
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181 | rtems_unsigned32 distance; |
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182 | rtems_unsigned32 best_distance = ~0; |
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183 | rtems_unsigned32 elements; |
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184 | |
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185 | if (table == 0) |
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186 | table = rtems_monitor_symbols; |
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187 | |
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188 | if ((table == 0) || (table->size == 0)) |
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189 | return 0; |
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190 | |
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191 | if (table->sorted == 0) |
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192 | rtems_symbol_sort(table); |
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193 | |
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194 | base = table->addresses; |
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195 | elements = table->next; |
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196 | |
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197 | while (elements) |
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198 | { |
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199 | sp = base + (elements / 2); |
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200 | if (value < sp->value) |
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201 | elements /= 2; |
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202 | else if (value > sp->value) |
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203 | { |
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204 | distance = value - sp->value; |
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205 | if (distance < best_distance) |
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206 | { |
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207 | best_distance = distance; |
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208 | best = sp; |
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209 | } |
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210 | base = sp + 1; |
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211 | elements = (elements / 2) - (elements % 2 ? 0 : 1); |
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212 | } |
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213 | else |
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214 | return sp; |
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215 | } |
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216 | |
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217 | if (value == base->value) |
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218 | return base; |
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219 | |
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220 | return best; |
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221 | } |
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222 | |
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223 | /* |
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224 | * Search the symbol table for the exact matching address. |
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225 | * If the symbol table has already been sorted, then |
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226 | * call the regular symbol value lookup, however, it it |
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227 | * has not yet been sorted, search it sequentially. |
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228 | * This routine is primarily used for low level symbol |
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229 | * lookups (eg. from exception handler and interrupt routines) |
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230 | * where the penality of sorted is not wanted and where |
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231 | * an exact match is needed such that symbol table order |
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232 | * is not important. |
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233 | */ |
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234 | const rtems_symbol_t * |
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235 | rtems_symbol_value_lookup_exact( |
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236 | rtems_symbol_table_t *table, |
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237 | rtems_unsigned32 value |
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238 | ) |
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239 | { |
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240 | rtems_unsigned32 s; |
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241 | rtems_symbol_t *sp; |
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242 | |
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243 | if (table == 0) |
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244 | { |
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245 | table = rtems_monitor_symbols; |
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246 | if (table == 0) |
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247 | return NULL; |
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248 | } |
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249 | |
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250 | if (table->sorted) |
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251 | { |
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252 | sp = rtems_symbol_value_lookup(table, value); |
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253 | if ( rtems_symbol_value(sp) == value ) |
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254 | return sp; |
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255 | else |
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256 | return NULL; /* not an exact match */ |
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257 | } |
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258 | |
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259 | for (s = 0, sp = table->addresses; s < table->next; s++, sp++) |
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260 | { |
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261 | if ( sp->value == value ) |
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262 | return sp; |
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263 | } |
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264 | |
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265 | return NULL; |
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266 | |
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267 | } |
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268 | |
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269 | |
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270 | /* |
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271 | * Search the symbol table by string name (case independent) |
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272 | */ |
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273 | |
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274 | rtems_symbol_t * |
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275 | rtems_symbol_name_lookup( |
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276 | rtems_symbol_table_t *table, |
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277 | char *name |
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278 | ) |
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279 | { |
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280 | rtems_unsigned32 s; |
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281 | rtems_symbol_t *sp; |
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282 | |
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283 | if (table == 0) |
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284 | { |
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285 | table = rtems_monitor_symbols; |
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286 | if (table == 0) |
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287 | return NULL; |
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288 | } |
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289 | |
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290 | for (s = 0, sp = table->addresses; s < table->next; s++, sp++) |
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291 | { |
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292 | if ( strcasecmp(sp->name, name) == 0 ) |
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293 | return sp; |
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294 | } |
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295 | |
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296 | return NULL; |
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297 | } |
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298 | |
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299 | void * |
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300 | rtems_monitor_symbol_next( |
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301 | void *object_info, |
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302 | rtems_monitor_symbol_t *canonical, |
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303 | rtems_id *next_id |
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304 | ) |
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305 | { |
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306 | rtems_symbol_table_t *table; |
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307 | rtems_unsigned32 n = rtems_get_index(*next_id); |
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308 | |
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309 | table = *(rtems_symbol_table_t **) object_info; |
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310 | if (table == 0) |
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311 | goto failed; |
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312 | |
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313 | if (n >= table->next) |
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314 | goto failed; |
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315 | |
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316 | /* NOTE: symbols do not have id and name fields */ |
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317 | |
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318 | if (table->sorted == 0) |
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319 | rtems_symbol_sort(table); |
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320 | |
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321 | _Thread_Disable_dispatch(); |
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322 | |
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323 | *next_id += 1; |
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324 | return (void *) (table->addresses + n); |
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325 | |
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326 | failed: |
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327 | *next_id = RTEMS_OBJECT_ID_FINAL; |
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328 | return 0; |
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329 | } |
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330 | |
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331 | void |
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332 | rtems_monitor_symbol_canonical( |
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333 | rtems_monitor_symbol_t *canonical_symbol, |
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334 | rtems_symbol_t *sp |
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335 | ) |
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336 | { |
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337 | canonical_symbol->value = sp->value; |
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338 | canonical_symbol->offset = 0; |
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339 | strncpy(canonical_symbol->name, sp->name, sizeof(canonical_symbol->name)); |
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340 | } |
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341 | |
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342 | |
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343 | void |
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344 | rtems_monitor_symbol_canonical_by_name( |
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345 | rtems_monitor_symbol_t *canonical_symbol, |
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346 | char *name |
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347 | ) |
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348 | { |
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349 | rtems_symbol_t *sp; |
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350 | |
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351 | sp = rtems_symbol_name_lookup(0, name); |
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352 | |
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353 | canonical_symbol->value = sp ? sp->value : 0; |
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354 | |
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355 | strncpy(canonical_symbol->name, name, sizeof(canonical_symbol->name)); |
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356 | canonical_symbol->offset = 0; |
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357 | } |
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358 | |
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359 | void |
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360 | rtems_monitor_symbol_canonical_by_value( |
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361 | rtems_monitor_symbol_t *canonical_symbol, |
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362 | void *value_void_p |
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363 | ) |
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364 | { |
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365 | unsigned32 value = (unsigned32) value_void_p; |
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366 | rtems_symbol_t *sp; |
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367 | |
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368 | sp = rtems_symbol_value_lookup(0, value); |
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369 | if (sp) |
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370 | { |
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371 | canonical_symbol->value = sp->value; |
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372 | canonical_symbol->offset = value - sp->value; |
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373 | strncpy(canonical_symbol->name, sp->name, sizeof(canonical_symbol->name)); |
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374 | } |
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375 | else |
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376 | { |
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377 | canonical_symbol->value = value; |
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378 | canonical_symbol->offset = 0; |
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379 | canonical_symbol->name[0] = '\0'; |
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380 | } |
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381 | } |
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382 | |
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383 | |
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384 | unsigned32 |
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385 | rtems_monitor_symbol_dump( |
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386 | rtems_monitor_symbol_t *canonical_symbol, |
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387 | boolean verbose |
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388 | ) |
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389 | { |
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390 | unsigned32 length = 0; |
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391 | |
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392 | /* |
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393 | * print the name if it exists AND if value is non-zero |
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394 | * Ie: don't print some garbage symbol for address 0 |
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395 | */ |
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396 | |
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397 | if (canonical_symbol->name[0] && (canonical_symbol->value != 0)) |
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398 | { |
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399 | if (canonical_symbol->offset == 0) |
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400 | length += printf("%.*s", |
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401 | (int) sizeof(canonical_symbol->name), |
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402 | canonical_symbol->name); |
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403 | else |
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404 | length += printf("<%.*s+0x%x>", |
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405 | (int) sizeof(canonical_symbol->name), |
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406 | canonical_symbol->name, |
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407 | canonical_symbol->offset); |
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408 | if (verbose) |
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409 | length += printf(" [0x%x]", canonical_symbol->value); |
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410 | } |
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411 | else |
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412 | length += printf("[0x%x]", canonical_symbol->value); |
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413 | |
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414 | return length; |
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415 | } |
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416 | |
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417 | |
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418 | void |
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419 | rtems_monitor_symbol_dump_all( |
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420 | rtems_symbol_table_t *table, |
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421 | boolean verbose |
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422 | ) |
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423 | { |
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424 | rtems_unsigned32 s; |
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425 | rtems_symbol_t *sp; |
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426 | |
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427 | if (table == 0) |
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428 | { |
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429 | table = rtems_monitor_symbols; |
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430 | if (table == 0) |
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431 | return; |
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432 | } |
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433 | |
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434 | if (table->sorted == 0) |
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435 | rtems_symbol_sort(table); |
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436 | |
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437 | for (s = 0, sp = table->addresses; s < table->next; s++, sp++) |
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438 | { |
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439 | rtems_monitor_symbol_t canonical_symbol; |
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440 | |
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441 | rtems_monitor_symbol_canonical(&canonical_symbol, sp); |
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442 | rtems_monitor_symbol_dump(&canonical_symbol, TRUE); |
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443 | printf("\n"); |
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444 | } |
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445 | } |
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446 | |
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447 | |
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448 | /* |
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449 | * 'symbol' command |
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450 | */ |
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451 | |
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452 | void |
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453 | rtems_monitor_symbol_cmd( |
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454 | int argc, |
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455 | char **argv, |
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456 | unsigned32 command_arg, |
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457 | boolean verbose |
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458 | ) |
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459 | { |
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460 | int arg; |
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461 | rtems_symbol_table_t *table; |
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462 | |
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463 | table = *(rtems_symbol_table_t **) command_arg; |
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464 | if (table == 0) |
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465 | { |
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466 | table = rtems_monitor_symbols; |
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467 | if (table == 0) |
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468 | return; |
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469 | } |
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470 | |
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471 | /* |
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472 | * Use object command to dump out whole symbol table |
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473 | */ |
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474 | if (argc == 1) |
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475 | rtems_monitor_symbol_dump_all(table, verbose); |
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476 | else |
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477 | { |
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478 | rtems_monitor_symbol_t canonical_symbol; |
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479 | |
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480 | for (arg=1; argv[arg]; arg++) |
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481 | { |
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482 | rtems_monitor_symbol_canonical_by_name(&canonical_symbol, argv[arg]); |
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483 | rtems_monitor_symbol_dump(&canonical_symbol, verbose); |
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484 | printf("\n"); |
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485 | } |
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486 | } |
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487 | } |
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