Mercurial > projects > ldc
annotate runtime/internal/memory.d @ 559:5d6ef6e6805d
Make rt_stackBottom return the right fixed value for darwin.
author | Christian Kamm <kamm incasoftware de> |
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date | Fri, 29 Aug 2008 15:01:48 +0200 |
parents | 02fb65cddc3e |
children | 68be7408a0db |
rev | line source |
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443
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1 /** |
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2 * This module exposes functionality for inspecting and manipulating memory. |
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3 * |
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4 * Copyright: Copyright (C) 2005-2006 Digital Mars, www.digitalmars.com. |
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5 * All rights reserved. |
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6 * License: |
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7 * This software is provided 'as-is', without any express or implied |
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8 * warranty. In no event will the authors be held liable for any damages |
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9 * arising from the use of this software. |
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10 * |
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11 * Permission is granted to anyone to use this software for any purpose, |
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12 * including commercial applications, and to alter it and redistribute it |
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13 * freely, in both source and binary form, subject to the following |
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14 * restrictions: |
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15 * |
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16 * o The origin of this software must not be misrepresented; you must not |
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17 * claim that you wrote the original software. If you use this software |
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18 * in a product, an acknowledgment in the product documentation would be |
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19 * appreciated but is not required. |
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20 * o Altered source versions must be plainly marked as such, and must not |
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21 * be misrepresented as being the original software. |
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22 * o This notice may not be removed or altered from any source |
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23 * distribution. |
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24 * Authors: Walter Bright, Sean Kelly |
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25 */ |
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26 module memory; |
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27 |
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28 |
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29 private |
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30 { |
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31 version( linux ) |
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32 { |
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33 //version = SimpleLibcStackEnd; |
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34 |
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35 version( SimpleLibcStackEnd ) |
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36 { |
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37 extern (C) extern void* __libc_stack_end; |
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38 } |
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39 else |
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40 { |
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41 import tango.stdc.posix.dlfcn; |
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42 } |
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43 } |
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44 version(LLVMDC) |
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45 { |
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46 pragma(intrinsic, "llvm.frameaddress") |
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47 { |
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48 void* llvm_frameaddress(uint level=0); |
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49 } |
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50 } |
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51 } |
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52 |
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53 |
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54 /** |
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55 * |
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56 */ |
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57 extern (C) void* rt_stackBottom() |
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58 { |
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59 version( Win32 ) |
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60 { |
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61 asm |
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62 { |
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63 naked; |
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64 mov EAX,FS:4; |
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65 ret; |
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66 } |
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67 } |
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68 else version( linux ) |
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69 { |
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70 version( SimpleLibcStackEnd ) |
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71 { |
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72 return __libc_stack_end; |
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73 } |
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74 else |
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75 { |
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76 // See discussion: http://autopackage.org/forums/viewtopic.php?t=22 |
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77 static void** libc_stack_end; |
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78 |
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79 if( libc_stack_end == libc_stack_end.init ) |
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80 { |
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81 void* handle = dlopen( null, RTLD_NOW ); |
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82 libc_stack_end = cast(void**) dlsym( handle, "__libc_stack_end" ); |
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83 dlclose( handle ); |
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84 } |
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85 return *libc_stack_end; |
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86 } |
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87 } |
558
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88 else version( darwin ) |
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89 { |
559
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90 // darwin has a fixed stack bottom |
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91 return cast(void*) 0xc0000000; |
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92 } |
443
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93 else |
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94 { |
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95 static assert( false, "Operating system not supported." ); |
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96 } |
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97 } |
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98 |
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99 |
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100 /** |
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101 * |
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102 */ |
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103 extern (C) void* rt_stackTop() |
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104 { |
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105 version(LLVMDC) |
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106 { |
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107 return llvm_frameaddress(); |
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108 } |
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109 else version( D_InlineAsm_X86 ) |
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110 { |
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111 asm |
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112 { |
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113 naked; |
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114 mov EAX, ESP; |
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115 ret; |
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116 } |
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117 } |
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118 else |
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119 { |
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120 static assert( false, "Architecture not supported." ); |
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121 } |
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122 } |
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123 |
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124 |
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125 private |
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126 { |
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127 version( Win32 ) |
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128 { |
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129 extern (C) |
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130 { |
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131 extern int _data_start__; |
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132 extern int _bss_end__; |
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133 |
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134 alias _data_start__ Data_Start; |
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135 alias _bss_end__ Data_End; |
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136 } |
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137 } |
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138 else version( linux ) |
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139 { |
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140 extern (C) |
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141 { |
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142 extern int _data; |
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143 extern int __data_start; |
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144 extern int _end; |
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145 extern int _data_start__; |
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146 extern int _data_end__; |
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147 extern int _bss_start__; |
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148 extern int _bss_end__; |
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149 extern int __fini_array_end; |
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150 } |
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151 |
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152 alias __data_start Data_Start; |
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153 alias _end Data_End; |
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154 } |
558
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155 else version( darwin ) |
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156 { |
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157 // TODO: How to access the darwin data segment? |
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158 } |
443
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159 |
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160 alias void delegate( void*, void* ) scanFn; |
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161 } |
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162 |
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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 extern (C) void rt_scanStaticData( scanFn scan ) |
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168 { |
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169 version( Win32 ) |
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170 { |
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171 scan( &Data_Start, &Data_End ); |
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172 } |
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173 else version( linux ) |
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174 { |
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175 //printf("scanning static data from %p to %p\n", &Data_Start, &Data_End); |
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176 scan( &Data_Start, &Data_End ); |
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177 } |
558
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178 else version( darwin ) |
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179 { |
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180 static assert( false, "darwin not supported." ); |
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181 } |
443
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182 else |
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183 { |
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184 static assert( false, "Operating system not supported." ); |
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185 } |
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186 } |