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annotate packages/hal/common/current/src/dbg-threads-syscall.c @ 66:bf00f99aec69 ecos-sw-2000-02-02

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Merge from eCos master repository on 2000-02-02-19:16:44-GMT
author jlarmour
date Wed, 02 Feb 2000 19:57:02 +0000
parents c38311975d4f
children ea3f0bd33a73
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1 //========================================================================
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2 //
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3 // dbg-threads-syscall.c
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4 //
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5 // Pseudo system calls for multi-threaded debug support
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6 //
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7 //========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): Red Hat, nickg
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35 // Contributors: Red Hat, nickg
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36 // Date: 1998-08-25
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37 // Purpose:
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38 // Description: Pseudo system calls to bind system specific multithread
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39 // debug support with a ROM monitor, cygmon. We call it
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40 // Cygmon, but the feature lives in libstub.
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41 // Usage:
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42 //
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43 //####DESCRIPTIONEND####
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44 //
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45 //========================================================================
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46
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47 #include <pkgconf/system.h>
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48 #include <pkgconf/hal.h>
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49
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50 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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51
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52 /* Only include this code if we do not have a kernel. Otherwise the kernel
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53 * supplies these functions for the app we are linked with.
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54 */
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55
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56 #include <cyg/hal/dbg-threads-api.h>
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57 #include <cyg/hal/dbg-thread-syscall.h>
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58
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59
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60 static dbg_syscall_func * dbg_syscall_ptr ;
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61
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62 static union dbg_thread_syscall_parms tcall ;
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63
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64 /* ----- INIT_THREADS_SYSCALL --------------------------------------- */
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65 /* Some external bing and configuration logic knows how to setup
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66 the ststem calls. In the first implementation, we have used a vector
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67 in the secondary vector table. This functions allows us to isolate that
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68 sort of system specific detail. Similarly, we do not export the
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69 specific detail of a dbg_syscall_func.
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70 */
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71
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72
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73 void init_threads_syscall(void * vector)
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74 {
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75 dbg_syscall_ptr = vector ; /* AH, the easy compatability of the
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76 void pointer*/
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77 } /* init_threads_syscall */
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78
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79 /* All forms of failure return 0 */
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80 /* Whether non support, incomplete initialization, unknown thread */
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81 static __inline__ int dbg_thread_syscall(
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82 enum dbg_syscall_ids id)
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83 {
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84 dbg_syscall_func f ; /* double indirect via */
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85 if (0 ==(f = *dbg_syscall_ptr)) return 0 ; /* no pointer to vector */
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86 if (0 == *f) return 0 ; /* vector not initialized */
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87 return (*f)(id,&tcall);
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88 }
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89
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90
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91
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92
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93 /* ------- INIT_THREAD_SYSCALL ------------------------------------------- */
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94 /* Received the address of the entry in the secondary interrupt vector table */
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95 /* This table is the interchange between the O.S. and Cygmon/libstub */
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96 /* This could get more complex so, I am doing it with a function
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97 rather than exposing the internals.
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98 */
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99 void init_thread_syscall(void * vector)
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100 {
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101 dbg_syscall_ptr = vector ;
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102 }
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103
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104 int dbg_thread_capabilities(struct dbg_capabilities * cbp)
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105 {
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106 #if 0
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107 tcall.cap_parms.abilities = cbp ;
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108 return dbg_thread_syscall(dbg_capabilities_func) ;
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109 #else
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110 cbp->mask1 = has_thread_current |
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111 has_thread_registers |
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112 has_thread_reg_change |
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113 has_thread_list |
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114 has_thread_info ;
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115 return 1 ;
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116 #endif
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117 }
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118
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119 int dbg_currthread(threadref * varparm)
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120 {
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121 tcall.currthread_parms.ref = varparm ;
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122 return dbg_thread_syscall(dbg_currthread_func) ;
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123 }
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124
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125
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126 int dbg_threadlist(
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127 int startflag,
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128 threadref * lastthreadid,
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129 threadref * next_thread
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130 )
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131 {
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132 tcall.threadlist_parms.startflag = startflag ;
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133 tcall.threadlist_parms.lastid = lastthreadid ;
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134 tcall.threadlist_parms.nextthreadid = next_thread ;
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135 return dbg_thread_syscall(dbg_threadlist_func) ;
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136 }
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137
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138 int dbg_threadinfo(
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139 threadref * threadid,
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140 struct cygmon_thread_debug_info * info)
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141 {
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142 tcall.info_parms.ref = threadid ;
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143 tcall.info_parms.info = info ;
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144 return dbg_thread_syscall(dbg_threadinfo_func) ;
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145 }
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146
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147 int dbg_getthreadreg(
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148 threadref * osthreadid,
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149 int regcount, /* count of registers in the array */
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150 void * regval) /* fillin this array */
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151 {
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152 tcall.reg_parms.thread = osthreadid ;
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153 tcall.reg_parms.regcount = regcount ;
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154 tcall.reg_parms.registers = regval ;
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155 return dbg_thread_syscall(dbg_getthreadreg_func) ;
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156 }
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157
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158 int dbg_setthreadreg(
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159 threadref * osthreadid,
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160 int regcount , /* number of registers */
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161 void * regval)
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162 {
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163 tcall.reg_parms.thread = osthreadid ;
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164 tcall.reg_parms.regcount = regcount ;
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165 tcall.reg_parms.registers = regval ;
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166 return dbg_thread_syscall(dbg_setthreadreg_func) ;
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167 } /* dbg_setthreadreg */
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168
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169 int dbg_scheduler(threadref *thread_id, int lock, int mode)
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170 {
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171 tcall.scheduler_parms.thread = thread_id;
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172 tcall.scheduler_parms.lock = lock ;
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173 tcall.scheduler_parms.mode = mode ;
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174
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175 return dbg_thread_syscall(dbg_scheduler_func) ;
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176 }
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177
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178
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179
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180 #if (CYG_BYTEORDER == CYG_LSBFIRST)
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181
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182 unsigned long swap32(unsigned long x)
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183 {
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184 unsigned long r = 0;
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185
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186 r |= (x>>24)&0xFF;
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187 r |= ((x>>16)&0xFF)<<8;
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188 r |= ((x>>8)&0xFF)<<16;
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189 r |= ((x)&0xFF)<<24;
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190
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191 return r;
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192 }
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193
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194 #else
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195
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196 #define swap32(x) ((unsigned long)(x))
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197
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198 #endif
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199
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200 int dbg_currthread_id(void)
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201 {
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202 threadref ref;
36
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203 if( dbg_currthread( &ref ) )
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204 return (cyg_uint16)swap32(((unsigned long *)ref)[1]);
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205 else return 0;
6
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206 }
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207
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208 #endif