1 | /* slightly changed for use by omalloc.h */ |
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2 | /* |
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3 | * defines to get the return-address for non-dmalloc_lp malloc calls. |
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4 | * |
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5 | * Copyright 2000 by Gray Watson |
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6 | * |
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7 | * This file is part of the dmalloc package. |
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8 | * |
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9 | * Permission to use, copy, modify, and distribute this software for |
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10 | * any purpose and without fee is hereby granted, provided that the |
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11 | * above copyright notice and this permission notice appear in all |
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12 | * copies, and that the name of Gray Watson not be used in advertising |
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13 | * or publicity pertaining to distribution of the document or software |
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14 | * without specific, written prior permission. |
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15 | * |
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16 | * Gray Watson makes no representations about the suitability of the |
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17 | * software described herein for any purpose. It is provided "as is" |
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18 | * without express or implied warranty. |
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19 | * |
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20 | * The author may be contacted via http://dmalloc.com/ |
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21 | * |
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22 | * $Id$ |
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23 | */ |
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24 | |
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25 | /* |
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26 | * This file contains the definition of the SET_RET_ADDR macro which |
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27 | * is designed to contain the archecture/compiler specific hacks to |
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28 | * determine the return-address from inside the malloc library. With |
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29 | * this information, the library can display caller information from |
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30 | * calls that do not use the malloc_lp functions. |
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31 | * |
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32 | * Most of the archectures here have been contributed by other |
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33 | * individuals and may need to be toggled a bit to remove local |
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34 | * configuration differences. |
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35 | * |
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36 | * PLEASE send all submissions, comments, problems to the author. |
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37 | * |
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38 | * NOTE: examining the assembly code for x = |
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39 | * __builtin_return_address(0); with gcc version 2+ should give you a |
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40 | * good start on building a hack for your box. |
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41 | */ |
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42 | |
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43 | #ifndef __OM_RETURN_H__ |
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44 | #define __OM_RETURN_H__ |
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45 | |
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46 | /*************************************/ |
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47 | |
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48 | /* for Sun SparcStations with GCC */ |
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49 | #if __sparc && __GNUC__ > 1 |
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50 | |
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51 | /* |
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52 | * NOTE: %i7 seems to be more reliable than the [%fp+4] used by |
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53 | * __builtin_return_address. [%fp+4] is on the stack however, meaning |
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54 | * it may be better -- less prone to be erased. However, it produces |
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55 | * some bogus data -- it seems to return the last return-address or |
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56 | * something like that. |
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57 | * |
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58 | * Alexandre Oliva <oliva@dcc.unicamp.br> recently advised to change |
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59 | * the "=g" to a "=m". If you are having problems, you may want to |
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60 | * return to the =g to see if it works. |
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61 | */ |
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62 | #define GET_RET_ADDR(file) asm("st %%i7,%0" : \ |
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63 | "=m" (file) : \ |
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64 | /* no inputs */ ) |
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65 | |
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66 | #if 0 |
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67 | |
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68 | /* this was the default however =g was recommended to be changed to =m */ |
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69 | #define GET_RET_ADDR(file) asm("st %%i7,%0" : \ |
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70 | "=g" (file) : \ |
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71 | /* no inputs */ ) |
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72 | |
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73 | /* |
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74 | * This was what the gcc __builtin_return_address returned. The above |
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75 | * versions worked better. It is here for reference purposes only. |
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76 | */ |
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77 | #define GET_RET_ADDR(file) asm("ld [%%fp+4],%%o0; st %%o0,%0" : \ |
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78 | "=g" (file) : \ |
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79 | /* no inputs */ : \ |
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80 | "o0") |
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81 | #endif |
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82 | |
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83 | #endif /* __sparc */ |
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84 | |
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85 | /*************************************/ |
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86 | |
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87 | /* for i[34]86 machines with GCC */ |
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88 | #if __i386 && __GNUC__ > 1 |
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89 | |
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90 | #define GET_RET_ADDR(file) asm("movl 4(%%ebp),%%eax ; movl %%eax,%0" : \ |
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91 | "=g" (file) : \ |
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92 | /* no inputs */ : \ |
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93 | "eax") |
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94 | |
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95 | #endif /* __i386 */ |
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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 | * For DEC Mips machines running Ultrix |
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101 | */ |
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102 | #if __mips |
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103 | |
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104 | /* |
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105 | * I have no idea how to get inline assembly with the default cc. |
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106 | * Anyone know how? |
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107 | */ |
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108 | |
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109 | #if 0 |
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110 | |
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111 | /* |
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112 | * NOTE: we assume here that file is global. |
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113 | * |
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114 | * $31 is the frame pointer. $2 looks to be the return address but maybe |
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115 | * not consistently. |
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116 | */ |
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117 | #define GET_RET_ADDR(file) asm("sw $2, file") |
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118 | |
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119 | #endif |
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120 | |
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121 | #endif /* __mips */ |
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122 | |
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123 | /******************************* contributions *******************************/ |
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124 | |
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125 | /* |
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126 | * For DEC Alphas running OSF. from Dave Hill <ddhill@zk3.dec.com> |
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127 | * and Alexandre Oliva <oliva@dcc.unicamp.br>. Thanks guys. |
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128 | */ |
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129 | #if __alpha |
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130 | |
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131 | #ifdef __GNUC__ |
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132 | |
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133 | #define GET_RET_ADDR(file) asm("bis $26, $26, %0" : "=r" (file)) |
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134 | |
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135 | #else /* __GNUC__ */ |
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136 | |
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137 | #include <c_asm.h> |
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138 | |
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139 | #define GET_RET_ADDR(file) file = (char *)asm("bis %ra,%ra,%v0") |
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140 | |
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141 | #endif /* __GNUC__ */ |
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142 | |
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143 | #endif /* __alpha */ |
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144 | |
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145 | /*************************************/ |
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146 | |
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147 | /* |
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148 | * For Data General workstations running DG/UX 5.4R3.00 from Joerg |
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149 | * Wunsch <joerg_wunsch@julia.tcd-dresden.de>. |
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150 | */ |
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151 | #ifdef __m88k__ |
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152 | |
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153 | /* |
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154 | * I have no ideas about the syntax of Motorola SVR[34] assemblers. |
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155 | * Also, there may be occasions where gcc does not set up a stack |
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156 | * frame for some function, so the returned value should be taken with |
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157 | * a grain of salt. For the ``average'' function calls it proved to be |
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158 | * correct anyway -- jw |
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159 | */ |
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160 | #if !__DGUX__ || _DGUXCOFF_TARGET |
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161 | # define M88K_RET_ADDR "ld %0,r30,4" |
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162 | #else /* __DGUX__ && !_DGUXCOFF_TARGET: DG/UX ELF with version 3 assembler */ |
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163 | # define M88K_RET_ADDR "ld %0,#r30,4" |
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164 | #endif |
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165 | |
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166 | #define GET_RET_ADDR(file) asm(M88K_RET_ADDR : \ |
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167 | "=r" (file) : \ |
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168 | /* no inputs */) |
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169 | |
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170 | #endif /* m88k */ |
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171 | |
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172 | /*************************************/ |
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173 | |
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174 | /* |
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175 | * SGI compilers implement a C level method of accessing the return |
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176 | * address by simply referencing the __return_address symbol. -- James |
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177 | * Bonfield <jkb@mrc-lmb.cam.ac.uk> |
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178 | */ |
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179 | #if defined(__sgi) |
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180 | |
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181 | #define GET_RET_ADDR(file) file = (void *)__return_address |
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182 | |
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183 | #endif /* __sgi */ |
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184 | |
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185 | /*************************************/ |
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186 | |
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187 | /* |
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188 | * Stratus FTX system (UNIX_System_V 4.0 FTX release 2.3.1.1 XA/R |
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189 | * Model 310 Intel i860XP processor) |
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190 | * |
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191 | * I ended up with compiling according to full-ANSI rules (using the |
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192 | * -Xa compiler option). This I could only do after modifying the |
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193 | * "dmalloc.h.3" in such a way that the malloc/calloc/realloc/free |
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194 | * definitions would no longer cause the compiler to bark with |
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195 | * 'identifier redeclared' (I just put an #ifdef _STDLIB_H ... #endif |
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196 | * around those functions). -- Wim_van_Duuren@stratus.com |
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197 | */ |
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198 | #if defined(_FTX) && defined(i860) |
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199 | |
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200 | /* |
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201 | * we first have the define the little assembly code function |
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202 | */ |
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203 | asm void ASM_GET_RET_ADDR(file) |
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204 | { |
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205 | % reg file; |
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206 | mov %r1, file |
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207 | % mem file; |
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208 | st.l %r31,-40(%fp) |
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209 | orh file@ha, %r0, %r31 |
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210 | st.l %r1, file@l(%r31) |
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211 | ld.l -40(%fp),%r31 |
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212 | % error |
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213 | } |
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214 | #define GET_RET_ADDR(file) ASM_GET_RET_ADDR(file) |
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215 | |
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216 | #endif /* _FTX & i860 */ |
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217 | |
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218 | /*************************************/ |
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219 | |
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220 | /* |
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221 | * For HP-UX PA-RISC with gcc/g++ from Jack Perdue |
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222 | * <j-perdue@tamu.edu>. |
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223 | */ |
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224 | #if __hpux && __hppa && __GNUC__ > 1 |
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225 | |
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226 | /* |
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227 | * This is my very first line of PA-RISC assembly ever. I have no |
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228 | * idea if is correct, but it seems to work. Register 2 (%r2) |
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229 | * contains the return address. The code generated by x = |
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230 | * __builtin_return_address() was considerably longer and without a |
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231 | * PA-RISC Instruction Set guide available (not even on the web), I |
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232 | * just put togther little tidbits of knowledge I found while looking |
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233 | * for one to take a stab with this. Like I said, it seems to work on |
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234 | * my g++ code under HPUX11 on a HP V-class system. YMMV. -- Jack |
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235 | * Perdue (j-perdue@tamu.edu) |
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236 | */ |
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237 | #define GET_RET_ADDR(file) asm("stw %%r2, %0" : "=m" (file) : ); |
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238 | |
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239 | #endif |
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240 | |
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241 | /*************************************/ |
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242 | |
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243 | /* |
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244 | * For Powerpc 603 based system running LynxOS 2.3.1 using gcc/gas. |
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245 | * From Shawn Carey <smc@questra.com>. |
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246 | */ |
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247 | #if defined(__powerpc__) && defined(__GNUC__) && !defined(__OPTIMIZE__) |
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248 | |
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249 | /* |
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250 | * This won't compile if "-O2" is used, but it seems to work fine with |
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251 | * "-O0". I'm no assembler expert; I was happy enough to come up with |
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252 | * something that works at all... :-) |
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253 | */ |
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254 | |
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255 | #define GET_RET_ADDR(file) \ |
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256 | do { \ |
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257 | asm("mflr 0"); \ |
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258 | asm("stw 0,%0" : "=g" (file)); \ |
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259 | } while(0) |
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260 | |
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261 | #endif /* __powerpc__ && __GNUC__ && !__OPTIMIZE__ */ |
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262 | |
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263 | /*************************************/ |
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264 | |
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265 | /********************************** default **********************************/ |
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266 | |
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267 | /* for all others, do nothing */ |
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268 | #ifndef GET_RET_ADDR |
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269 | |
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270 | #if __GNUC__ > 1 |
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271 | #define GET_RET_ADDR(file) (file = __builtin_return_address(0)) |
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272 | #else |
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273 | #define GET_RET_ADDR(file) (file = 0) |
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274 | #endif |
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275 | #endif /* __GNUC__ > 1 */ |
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276 | |
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277 | #endif /* ! __OM_RETURN_H__ */ |
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