1 | /* |
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2 | * COPYRIGHT (c) 2012, 2018 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.org/license/LICENSE. |
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7 | */ |
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8 | /** |
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9 | * @file |
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10 | * |
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11 | * @ingroup rtems_rtl |
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12 | * |
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13 | * @brief RTEMS Run-Time Linker Allocator |
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14 | */ |
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15 | |
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16 | #include <stdio.h> |
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17 | #include <string.h> |
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18 | |
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19 | #include <rtems/rtl/rtl.h> |
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20 | #include "rtl-alloc-heap.h" |
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21 | #include <rtems/rtl/rtl-trace.h> |
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22 | |
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23 | /** |
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24 | * Tags as symbols for tracing. |
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25 | */ |
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26 | #if RTEMS_RTL_TRACE |
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27 | static const char* tag_labels[6] = |
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28 | { |
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29 | "OBJECT", |
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30 | "SYMBOL", |
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31 | "EXTERNAL", |
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32 | "READ", |
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33 | "READ_WRITE", |
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34 | "READ_EXEC", |
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35 | }; |
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36 | #define rtems_rtl_trace_tag_label(_l) tag_labels[_l] |
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37 | #else |
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38 | #define rtems_rtl_trace_tag_label(_l) "" |
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39 | #endif |
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40 | |
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41 | void |
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42 | rtems_rtl_alloc_initialise (rtems_rtl_alloc_data* data) |
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43 | { |
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44 | int c; |
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45 | data->allocator = rtems_rtl_alloc_heap; |
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46 | for (c = 0; c < RTEMS_RTL_ALLOC_TAGS; ++c) |
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47 | rtems_chain_initialize_empty (&data->indirects[c]); |
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48 | } |
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49 | |
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50 | void* |
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51 | rtems_rtl_alloc_new (rtems_rtl_alloc_tag tag, size_t size, bool zero) |
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52 | { |
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53 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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54 | void* address = NULL; |
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55 | |
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56 | /* |
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57 | * Obtain memory from the allocator. The address field is set by the |
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58 | * allocator. |
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59 | */ |
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60 | if (rtl != NULL) |
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61 | rtl->allocator.allocator (RTEMS_RTL_ALLOC_NEW, tag, &address, size); |
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62 | |
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63 | rtems_rtl_unlock (); |
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64 | |
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65 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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66 | printf ("rtl: alloc: new: %s addr=%p size=%zu\n", |
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67 | rtems_rtl_trace_tag_label (tag), address, size); |
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68 | |
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69 | /* |
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70 | * Only zero the memory if asked to and the allocation was successful. |
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71 | */ |
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72 | if (address != NULL && zero) |
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73 | memset (address, 0, size); |
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74 | |
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75 | return address; |
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76 | } |
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77 | |
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78 | void |
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79 | rtems_rtl_alloc_del (rtems_rtl_alloc_tag tag, void* address) |
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80 | { |
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81 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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82 | |
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83 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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84 | printf ("rtl: alloc: del: %s addr=%p\n", |
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85 | rtems_rtl_trace_tag_label (tag), address); |
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86 | |
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87 | if (rtl != NULL && address != NULL) |
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88 | rtl->allocator.allocator (RTEMS_RTL_ALLOC_DEL, tag, &address, 0); |
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89 | |
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90 | rtems_rtl_unlock (); |
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91 | } |
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92 | |
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93 | void |
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94 | rtems_rtl_alloc_wr_enable (rtems_rtl_alloc_tag tag, void* address) |
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95 | { |
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96 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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97 | |
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98 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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99 | printf ("rtl: alloc: wr-enable: addr=%p\n", address); |
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100 | |
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101 | if (rtl != NULL && address != NULL) |
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102 | rtl->allocator.allocator (RTEMS_RTL_ALLOC_WR_ENABLE, |
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103 | tag, |
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104 | address, |
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105 | 0); |
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106 | |
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107 | rtems_rtl_unlock (); |
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108 | } |
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109 | |
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110 | void |
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111 | rtems_rtl_alloc_lock (void) |
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112 | { |
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113 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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114 | |
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115 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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116 | printf ("rtl: alloc: lock\n"); |
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117 | |
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118 | if (rtl != NULL) |
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119 | rtl->allocator.allocator (RTEMS_RTL_ALLOC_LOCK, |
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120 | RTEMS_RTL_ALLOC_OBJECT, /* should be ignored */ |
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121 | NULL, |
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122 | 0); |
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123 | |
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124 | rtems_rtl_unlock (); |
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125 | } |
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126 | |
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127 | |
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128 | void |
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129 | rtems_rtl_alloc_unlock (void) |
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130 | { |
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131 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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132 | |
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133 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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134 | printf ("rtl: alloc: unlock\n"); |
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135 | |
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136 | if (rtl != NULL) |
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137 | rtl->allocator.allocator (RTEMS_RTL_ALLOC_UNLOCK, |
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138 | RTEMS_RTL_ALLOC_OBJECT, /* should be ignored */ |
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139 | NULL, |
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140 | 0); |
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141 | |
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142 | rtems_rtl_unlock (); |
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143 | } |
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144 | void |
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145 | rtems_rtl_alloc_wr_disable (rtems_rtl_alloc_tag tag, void* address) |
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146 | { |
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147 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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148 | |
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149 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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150 | printf ("rtl: alloc: wr-disable: addr=%p\n", address); |
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151 | |
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152 | if (rtl != NULL && address != NULL) |
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153 | rtl->allocator.allocator (RTEMS_RTL_ALLOC_WR_DISABLE, |
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154 | tag, |
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155 | address, |
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156 | 0); |
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157 | |
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158 | rtems_rtl_unlock (); |
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159 | } |
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160 | |
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161 | rtems_rtl_allocator |
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162 | rtems_rtl_alloc_hook (rtems_rtl_allocator handler) |
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163 | { |
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164 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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165 | rtems_rtl_allocator previous = rtl->allocator.allocator; |
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166 | rtl->allocator.allocator = handler; |
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167 | rtems_rtl_unlock (); |
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168 | return previous; |
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169 | } |
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170 | |
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171 | void |
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172 | rtems_rtl_alloc_indirect_new (rtems_rtl_alloc_tag tag, |
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173 | rtems_rtl_ptr* handle, |
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174 | size_t size) |
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175 | { |
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176 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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177 | |
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178 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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179 | { |
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180 | if (!rtems_rtl_ptr_null (handle)) |
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181 | printf ("rtl: alloc: inew: %s handle=%p: not null\n", |
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182 | rtems_rtl_trace_tag_label (tag), handle); |
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183 | printf ("rtl: alloc: inew: %s handle=%p size=%zd\n", |
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184 | rtems_rtl_trace_tag_label (tag), handle, size); |
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185 | } |
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186 | |
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187 | if (rtl) |
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188 | { |
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189 | rtems_rtl_alloc_data* allocator = &rtl->allocator; |
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190 | handle->pointer = rtems_rtl_alloc_new (tag, size, false); |
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191 | if (!rtems_rtl_ptr_null (handle)) |
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192 | rtems_chain_append_unprotected (&allocator->indirects[tag], |
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193 | &handle->node); |
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194 | } |
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195 | |
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196 | rtems_rtl_unlock (); |
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197 | } |
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198 | |
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199 | void |
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200 | rtems_rtl_alloc_indirect_del (rtems_rtl_alloc_tag tag, |
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201 | rtems_rtl_ptr* handle) |
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202 | { |
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203 | rtems_rtl_data* rtl = rtems_rtl_lock (); |
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204 | |
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205 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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206 | { |
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207 | if (rtems_rtl_ptr_null (handle)) |
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208 | printf ("rtl: alloc: idel: %s handle=%p: is null\n", |
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209 | rtems_rtl_trace_tag_label (tag), handle); |
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210 | printf ("rtl: alloc: idel: %s handle=%p\n", |
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211 | rtems_rtl_trace_tag_label (tag), handle); |
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212 | } |
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213 | |
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214 | if (rtl && !rtems_rtl_ptr_null (handle)) |
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215 | { |
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216 | rtems_chain_extract_unprotected (&handle->node); |
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217 | rtems_rtl_alloc_del (tag, &handle->pointer); |
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218 | } |
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219 | } |
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220 | |
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221 | rtems_rtl_alloc_tag |
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222 | rtems_rtl_alloc_text_tag (void) |
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223 | { |
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224 | return RTEMS_RTL_ALLOC_READ_EXEC; |
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225 | } |
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226 | |
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227 | rtems_rtl_alloc_tag |
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228 | rtems_rtl_alloc_const_tag (void) |
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229 | { |
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230 | return RTEMS_RTL_ALLOC_READ; |
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231 | } |
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232 | |
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233 | rtems_rtl_alloc_tag |
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234 | rtems_rtl_alloc_eh_tag (void) |
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235 | { |
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236 | return RTEMS_RTL_ALLOC_READ; |
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237 | } |
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238 | |
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239 | rtems_rtl_alloc_tag |
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240 | rtems_rtl_alloc_data_tag (void) |
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241 | { |
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242 | return RTEMS_RTL_ALLOC_READ_WRITE; |
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243 | } |
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244 | |
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245 | rtems_rtl_alloc_tag |
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246 | rtems_rtl_alloc_bss_tag (void) |
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247 | { |
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248 | return RTEMS_RTL_ALLOC_READ_WRITE; |
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249 | } |
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250 | |
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251 | bool |
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252 | rtems_rtl_alloc_module_new (void** text_base, size_t text_size, |
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253 | void** const_base, size_t const_size, |
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254 | void** eh_base, size_t eh_size, |
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255 | void** data_base, size_t data_size, |
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256 | void** bss_base, size_t bss_size) |
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257 | { |
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258 | *text_base = *const_base = *data_base = *bss_base = NULL; |
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259 | |
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260 | if (text_size) |
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261 | { |
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262 | *text_base = rtems_rtl_alloc_new (rtems_rtl_alloc_text_tag (), |
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263 | text_size, false); |
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264 | if (!*text_base) |
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265 | { |
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266 | return false; |
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267 | } |
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268 | } |
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269 | |
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270 | if (const_size) |
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271 | { |
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272 | *const_base = rtems_rtl_alloc_new (rtems_rtl_alloc_const_tag (), |
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273 | const_size, false); |
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274 | if (!*const_base) |
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275 | { |
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276 | rtems_rtl_alloc_module_del (text_base, const_base, eh_base, |
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277 | data_base, bss_base); |
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278 | return false; |
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279 | } |
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280 | } |
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281 | |
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282 | if (eh_size) |
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283 | { |
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284 | *eh_base = rtems_rtl_alloc_new (rtems_rtl_alloc_eh_tag (), |
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285 | eh_size, false); |
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286 | if (!*eh_base) |
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287 | { |
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288 | rtems_rtl_alloc_module_del (text_base, const_base, eh_base, |
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289 | data_base, bss_base); |
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290 | return false; |
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291 | } |
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292 | } |
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293 | |
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294 | if (data_size) |
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295 | { |
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296 | *data_base = rtems_rtl_alloc_new (rtems_rtl_alloc_data_tag (), |
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297 | data_size, false); |
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298 | if (!*data_base) |
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299 | { |
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300 | rtems_rtl_alloc_module_del (text_base, const_base, eh_base, |
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301 | data_base, bss_base); |
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302 | return false; |
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303 | } |
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304 | } |
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305 | |
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306 | if (bss_size) |
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307 | { |
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308 | *bss_base = rtems_rtl_alloc_new (rtems_rtl_alloc_bss_tag (), |
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309 | bss_size, false); |
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310 | if (!*bss_base) |
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311 | { |
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312 | rtems_rtl_alloc_module_del (text_base, const_base, eh_base, |
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313 | data_base, bss_base); |
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314 | return false; |
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315 | } |
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316 | } |
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317 | |
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318 | return true; |
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319 | } |
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320 | |
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321 | void |
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322 | rtems_rtl_alloc_module_del (void** text_base, |
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323 | void** const_base, |
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324 | void** eh_base, |
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325 | void** data_base, |
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326 | void** bss_base) |
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327 | { |
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328 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_WRITE, *bss_base); |
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329 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_WRITE, *data_base); |
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330 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ, *eh_base); |
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331 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ, *const_base); |
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332 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_EXEC, *text_base); |
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333 | *text_base = *const_base = *eh_base = *data_base = *bss_base = NULL; |
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334 | } |
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