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annotate packages/kernel/current/tests/kexcept1.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 74dbf4c3f2e1
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1 /*=================================================================
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2 //
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3 // kexcept1.cxx
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4 //
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5 // Kernel C API Exception test 1
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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/
208
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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): dsm
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44 // Contributors: dsm, jlarmour
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45 // Date: 1999-02-16
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46 // Description: Test basic exception functionality
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47 //####DESCRIPTIONEND####
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48 */
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49
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50 #include <cyg/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL
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51
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52 #include <cyg/kernel/kapi.h>
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53
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54 #include <cyg/infra/testcase.h>
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55
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56 #ifdef CYGPKG_KERNEL_EXCEPTIONS
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57
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58 #ifdef CYGFUN_KERNEL_API_C
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59
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60 #include <cyg/hal/hal_intr.h> // exception ranges
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61
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62 #include "testaux.h"
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63
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64 #ifndef CYGPKG_HAL_ARM_PID
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65 #define EXCEPTION_DATA_ACCESS
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66 #endif
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67
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68 #define NTHREADS 1
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69 #define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
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70
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71 static cyg_handle_t thread[NTHREADS];
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72
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73 static cyg_thread thread_obj[NTHREADS];
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74 static char stack[NTHREADS][STACKSIZE];
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75
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76
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77
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78 #ifdef EXCEPTION_DATA_ACCESS
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79 static cyg_exception_handler_t handler0;
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80
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81 static void handler0(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info)
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82 {
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83 CYG_TEST_INFO("handler 0 called");
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84
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85 CYG_TEST_CHECK((cyg_addrword_t)123 == data, "handler given wrong data");
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86
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87 // ignore machine specific stuff
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88 CYG_UNUSED_PARAM(cyg_code_t, number);
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89 CYG_UNUSED_PARAM(cyg_addrword_t, info);
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90
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91 CYG_TEST_PASS_FINISH("Except 1 OK");
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92 }
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93 #endif
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94
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95 static int d0;
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96
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97 static void handler1(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info)
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98 {
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99 CYG_TEST_INFO("handler 1 called");
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100
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101 CYG_TEST_CHECK((cyg_addrword_t)&d0 == data, "handler given wrong data");
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102
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103 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
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104 CYG_TEST_CHECK(number == CYGNUM_HAL_EXCEPTION_MAX, "handler given wrong number");
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105 #else
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106 CYG_UNUSED_PARAM(cyg_code_t, number);
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107 #endif
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108
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109 CYG_TEST_CHECK((cyg_addrword_t)99 == info, "handler given wrong info");
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110 }
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111
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112
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113 #ifdef EXCEPTION_DATA_ACCESS
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114 // The following function attempts to cause an exception in various
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115 // hacky ways. It is machine dependent what exception is generated.
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116 // It does reads rather than writes hoping not to corrupt anything
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117 // important.
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118 static int
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119 cause_fpe(int num)
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120 {
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121 double a;
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122
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123 a = 1.0/num; // Depending on FPU emulation and/or
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124 // the FPU architecture, this may
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125 // cause an exception.
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126 // (float division by zero)
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127
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128 return ((int)a)/num; // This may cause an exception if
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129 // the architecture supports it.
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130 // (integer division by zero).
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131 } // cause_fpe()
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132
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133 void cause_exception(void)
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134 {
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135 int x;
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136 unsigned int p=0;
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137
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138 // First try for an address exception (unaligned access exception
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139 // or SEGV/BUS exceptions)
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140 do {
126
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141 x=*(volatile int *)(p-1);
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142 p+=0x100000;
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143 } while(p != 0);
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144
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145 // Next try an integer or floating point divide-by-zero exception.
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146 cause_fpe(0);
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147 }
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148 #endif
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149
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150 static void entry0( CYG_ADDRWORD data )
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151 {
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152 #ifdef EXCEPTION_DATA_ACCESS
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153 cyg_code_t n;
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154 #endif
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155 cyg_exception_handler_t *old_handler, *old_handler1;
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156 cyg_addrword_t old_data, old_data1;
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157
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158 CYG_UNUSED_PARAM(CYG_ADDRESS, data);
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159
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160 cyg_exception_set_handler(
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161 CYGNUM_HAL_EXCEPTION_MAX,
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162 &handler1,
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163 (cyg_addrword_t)&d0,
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164 &old_handler,
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165 &old_data);
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166
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167 cyg_exception_set_handler(
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168 CYGNUM_HAL_EXCEPTION_MAX,
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169 &handler1,
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170 (cyg_addrword_t)&d0,
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171 &old_handler1,
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172 &old_data1);
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173
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174 CYG_TEST_CHECK(old_handler1 == &handler1,
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175 "register exception: old_handler not the one previously registered");
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176 CYG_TEST_CHECK(old_data1 == (cyg_addrword_t)&d0,
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177 "register exception: old_data not those previously registered");
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178
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179 cyg_exception_call_handler(
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180 cyg_thread_self(),
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181 CYGNUM_HAL_EXCEPTION_MAX,
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182 (cyg_addrword_t)99);
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183
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184 CYG_TEST_INFO("handler 1 returned");
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185
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186 cyg_exception_clear_handler(CYGNUM_HAL_EXCEPTION_MAX);
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187 cyg_exception_clear_handler(CYGNUM_HAL_EXCEPTION_MAX);
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188
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189 #ifdef EXCEPTION_DATA_ACCESS
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190
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191 #if 0
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192 #elif defined(CYGPKG_HAL_POWERPC_SIM)
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193 // The exception generated by the SIM is not recognized by GDB.
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194 // PR 19945 workaround.
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195 CYG_TEST_NA("Not applicable to PowerPC SIM");
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196 #endif
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197
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198 for(n = CYGNUM_HAL_EXCEPTION_MIN; n <= CYGNUM_HAL_EXCEPTION_MAX; n++) {
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199 cyg_exception_set_handler(
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200 n,
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201 handler0,
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202 (cyg_addrword_t)123,
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203 &old_handler1,
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204 &old_data1);
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205 }
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206
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207 CYG_TEST_PASS("Attempting to provoke exception");
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208
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209 cause_exception();
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210
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211 CYG_TEST_FAIL_FINISH("Couldn't cause exception");
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212 #else // EXCEPTION_DATA_ACCESS
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213 CYG_TEST_NA("Platform does not support data exceptions");
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214 #endif
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215 }
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216
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217 #ifdef CYG_HAL_MIPS_TX39_JMR3904
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218
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219 extern void __default_exception_vsr(void);
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220
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221 #endif
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222
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223 void except0_main( void )
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224 {
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225 // Use CYG_TEST_GDBCMD _before_ CYG_TEST_INIT()
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226 CYG_TEST_GDBCMD("handle SIGBUS nostop");
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227 CYG_TEST_GDBCMD("handle SIGSEGV nostop");
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228 CYG_TEST_GDBCMD("handle SIGFPE nostop");
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229
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230 CYG_TEST_INIT();
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231
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232 #ifdef HAL_VSR_SET_TO_ECOS_HANDLER
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233 // Reclaim the VSR off CygMon possibly
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234 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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235 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_ACCESS, NULL );
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236 #endif
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237 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS
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238 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS, NULL );
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239 #endif
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240 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS
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241 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, NULL );
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242 #endif
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243 #ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION
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244 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, NULL );
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245 #endif
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246 #ifdef CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO
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247 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO, NULL );
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248 #endif
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249 #ifdef CYGNUM_HAL_EXCEPTION_FPU
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250 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU, NULL );
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251 #endif
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252 #ifdef CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO
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253 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO, NULL );
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254 #endif
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255 #endif
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256
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257 cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kexcept1",
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258 (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]);
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259 cyg_thread_resume(thread[0]);
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260
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261 cyg_scheduler_start();
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262
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263 CYG_TEST_FAIL_FINISH("Not reached");
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264 }
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265
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266 externC void
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267 cyg_start( void )
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268 {
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269 except0_main();
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270 }
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271
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272 #else // def CYGFUN_KERNEL_API_C
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273 #define N_A_MSG "Kernel C API layer disabled"
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274 #endif // def CYGFUN_KERNEL_API_C
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275 #else // def CYGPKG_KERNEL_EXCEPTIONS
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276 #define N_A_MSG "Exceptions disabled"
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277 #endif // def CYGPKG_KERNEL_EXCEPTIONS
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278
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279 #ifdef N_A_MSG
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280 externC void
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281 cyg_start( void )
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282 {
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283 CYG_TEST_INIT();
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284 CYG_TEST_NA( N_A_MSG);
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285 }
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286 #endif // N_A_MSG
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287
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288 /* EOF kexcept1.c */