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annotate packages/hal/common/current/src/dbg-threads-syscall.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents ea3f0bd33a73
children d2c90368aeef
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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 //========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): Red Hat, nickg
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44 // Contributors: Red Hat, nickg
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45 // Date: 1998-08-25
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46 // Purpose:
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47 // Description: Pseudo system calls to bind system specific multithread
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48 // debug support with a ROM monitor, cygmon. We call it
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49 // Cygmon, but the feature lives in libstub.
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50 // Usage:
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //========================================================================
6
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55
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56 #include <pkgconf/system.h>
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57 #include <pkgconf/hal.h>
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58
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59 #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT)
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60
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61 /* Only include this code if we do not have a kernel. Otherwise the kernel
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62 * supplies these functions for the app we are linked with.
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63 */
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64
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65 #include <cyg/hal/dbg-threads-api.h>
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66 #include <cyg/hal/dbg-thread-syscall.h>
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67
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68
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69 static dbg_syscall_func * dbg_syscall_ptr ;
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70
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71 static union dbg_thread_syscall_parms tcall ;
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72
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73 /* ----- INIT_THREADS_SYSCALL --------------------------------------- */
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74 /* Some external bing and configuration logic knows how to setup
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75 the ststem calls. In the first implementation, we have used a vector
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76 in the secondary vector table. This functions allows us to isolate that
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77 sort of system specific detail. Similarly, we do not export the
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78 specific detail of a dbg_syscall_func.
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79 */
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80
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81
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82 void init_threads_syscall(void * vector)
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83 {
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84 dbg_syscall_ptr = vector ; /* AH, the easy compatability of the
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85 void pointer*/
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86 } /* init_threads_syscall */
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87
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88 /* All forms of failure return 0 */
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89 /* Whether non support, incomplete initialization, unknown thread */
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90 static __inline__ int dbg_thread_syscall(
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91 enum dbg_syscall_ids id)
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92 {
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93 dbg_syscall_func f ; /* double indirect via */
198
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94 if (0 == dbg_syscall_ptr) return 0; /* dbg_syscall_ptr never init'd */
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95 if (0 ==(f = *dbg_syscall_ptr)) return 0 ; /* vector not initialized */
6
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96 return (*f)(id,&tcall);
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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 /* ------- INIT_THREAD_SYSCALL ------------------------------------------- */
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103 /* Received the address of the entry in the secondary interrupt vector table */
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104 /* This table is the interchange between the O.S. and Cygmon/libstub */
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105 /* This could get more complex so, I am doing it with a function
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106 rather than exposing the internals.
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107 */
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108 void init_thread_syscall(void * vector)
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109 {
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110 dbg_syscall_ptr = vector ;
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111 }
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112
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113 int dbg_thread_capabilities(struct dbg_capabilities * cbp)
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114 {
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115 #if 0
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116 tcall.cap_parms.abilities = cbp ;
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117 return dbg_thread_syscall(dbg_capabilities_func) ;
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118 #else
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119 cbp->mask1 = has_thread_current |
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120 has_thread_registers |
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121 has_thread_reg_change |
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122 has_thread_list |
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123 has_thread_info ;
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124 return 1 ;
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125 #endif
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126 }
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127
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128 int dbg_currthread(threadref * varparm)
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129 {
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130 tcall.currthread_parms.ref = varparm ;
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131 return dbg_thread_syscall(dbg_currthread_func) ;
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132 }
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133
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134
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135 int dbg_threadlist(
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136 int startflag,
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137 threadref * lastthreadid,
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138 threadref * next_thread
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139 )
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140 {
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141 tcall.threadlist_parms.startflag = startflag ;
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142 tcall.threadlist_parms.lastid = lastthreadid ;
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143 tcall.threadlist_parms.nextthreadid = next_thread ;
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144 return dbg_thread_syscall(dbg_threadlist_func) ;
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145 }
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146
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147 int dbg_threadinfo(
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148 threadref * threadid,
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149 struct cygmon_thread_debug_info * info)
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150 {
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151 tcall.info_parms.ref = threadid ;
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152 tcall.info_parms.info = info ;
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153 return dbg_thread_syscall(dbg_threadinfo_func) ;
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154 }
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155
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156 int dbg_getthreadreg(
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157 threadref * osthreadid,
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158 int regcount, /* count of registers in the array */
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159 void * regval) /* fillin this array */
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160 {
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161 tcall.reg_parms.thread = osthreadid ;
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162 tcall.reg_parms.regcount = regcount ;
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163 tcall.reg_parms.registers = regval ;
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164 return dbg_thread_syscall(dbg_getthreadreg_func) ;
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165 }
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166
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167 int dbg_setthreadreg(
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168 threadref * osthreadid,
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169 int regcount , /* number of registers */
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170 void * regval)
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171 {
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172 tcall.reg_parms.thread = osthreadid ;
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173 tcall.reg_parms.regcount = regcount ;
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174 tcall.reg_parms.registers = regval ;
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175 return dbg_thread_syscall(dbg_setthreadreg_func) ;
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176 } /* dbg_setthreadreg */
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177
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178 int dbg_scheduler(threadref *thread_id, int lock, int mode)
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179 {
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180 tcall.scheduler_parms.thread = thread_id;
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181 tcall.scheduler_parms.lock = lock ;
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182 tcall.scheduler_parms.mode = mode ;
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183
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184 return dbg_thread_syscall(dbg_scheduler_func) ;
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185 }
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186
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187
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188
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189 #if (CYG_BYTEORDER == CYG_LSBFIRST)
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190
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191 unsigned long swap32(unsigned long x)
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192 {
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193 unsigned long r = 0;
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194
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195 r |= (x>>24)&0xFF;
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196 r |= ((x>>16)&0xFF)<<8;
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197 r |= ((x>>8)&0xFF)<<16;
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198 r |= ((x)&0xFF)<<24;
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199
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200 return r;
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201 }
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202
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203 #else
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204
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205 #define swap32(x) ((unsigned long)(x))
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206
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207 #endif
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208
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209 int dbg_currthread_id(void)
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210 {
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211 threadref ref;
36
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212 if( dbg_currthread( &ref ) )
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213 return (cyg_uint16)swap32(((unsigned long *)ref)[1]);
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214 else return 0;
6
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215 }
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216
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217 #endif