[e70e45] | 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: omReturn.h,v 1.3 2000-08-14 12:26:49 obachman Exp $ |
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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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