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annotate packages/kernel/current/tests/except1.cxx @ 161:ac086aa3217e

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Merge from eCos master repository on 2001-06-08-21:11:51-BST
author jlarmour
date Sun, 10 Jun 2001 19:35:23 +0000
parents eb9fd8c04db3
children 353a011b23b8
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1 //=================================================================
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2 //
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3 // except1.cxx
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4 //
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5 // Exception test 1
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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, 2001 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): dsm
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35 // Contributors: dsm, jlarmour
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36 // Date: 1999-02-16
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37 // Description: Test basic exception functionality
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38 //####DESCRIPTIONEND####
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39
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40 #include <pkgconf/kernel.h>
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41
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42 #include <cyg/infra/testcase.h>
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43
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44 #ifdef CYGPKG_KERNEL_EXCEPTIONS
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45
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46 #include <cyg/kernel/sched.hxx> // Cyg_Scheduler::start()
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47 #include <cyg/kernel/thread.hxx> // Cyg_Thread
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48 #include <cyg/kernel/intr.hxx> // cyg_VSR
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49
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50 #include <cyg/hal/hal_intr.h> // exception ranges
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51
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52 #include <cyg/kernel/sched.inl>
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53 #include <cyg/kernel/thread.inl>
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54
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55 #define NTHREADS 1
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56 #include "testaux.hxx"
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57
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58 static int d0;
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59 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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60 static cyg_exception_handler handler0;
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61
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62 static void handler0(CYG_ADDRWORD data, cyg_code number, CYG_ADDRWORD info)
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63 {
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64 CYG_TEST_INFO("handler 0 called");
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65
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66 CYG_TEST_CHECK((CYG_ADDRWORD)123 == data, "handler given wrong data");
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67
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68 // ignore machine specific stuff
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69 CYG_UNUSED_PARAM(cyg_code, number);
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70 CYG_UNUSED_PARAM(CYG_ADDRWORD, info);
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71
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72 CYG_TEST_PASS_FINISH("Except 1 OK");
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73 }
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74 #endif
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75
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76 static void handler1(CYG_ADDRWORD data, cyg_code number, CYG_ADDRWORD info)
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77 {
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78 CYG_TEST_INFO("handler 1 called");
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79
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80 CYG_TEST_CHECK((CYG_ADDRWORD)&d0 == data, "handler given wrong data");
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81
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82 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
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83 CYG_TEST_CHECK(number == CYGNUM_HAL_EXCEPTION_MAX, "handler given wrong number");
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84 #else
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85 CYG_UNUSED_PARAM(cyg_code, number);
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86 #endif
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87
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88 CYG_TEST_CHECK((CYG_ADDRWORD)99 == info, "handler given wrong info");
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89 }
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90
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91 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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92 // The following function attempts to cause an exception in various
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93 // hacky ways. It is machine dependent what exception is generated.
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94 // It does reads rather than writes hoping not to corrupt anything
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95 // important.
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96 static int
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97 cause_fpe(int num)
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98 {
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99 double a;
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100
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101 a = 1.0/num; // Depending on FPU emulation and/or
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102 // the FPU architecture, this may
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103 // cause an exception.
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104 // (float division by zero)
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105
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106 return ((int)a)/num; // This may cause an exception if
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107 // the architecture supports it.
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108 // (integer division by zero).
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109 } // cause_fpe()
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110
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111 void cause_exception(void)
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112 {
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113 int x;
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114 unsigned int p=0;
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115
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116 // First try for an address exception (unaligned access exception
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117 // or SEGV/BUS exceptions)
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118 do {
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119 x=*(volatile int *)(p-1);
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120 p+=0x100000;
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121 } while(p != 0);
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122
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123 // Next try an integer or floating point divide-by-zero exception.
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124 cause_fpe(0);
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125 }
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126 #endif
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127
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128 static void entry0( CYG_ADDRWORD data )
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129 {
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130 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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131 cyg_code n;
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132 #endif
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133 cyg_exception_handler *old_handler, *old_handler1;
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134 CYG_ADDRWORD old_data, old_data1;
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135 Cyg_Thread *p=Cyg_Thread::self();
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136
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137 CYG_UNUSED_PARAM(CYG_ADDRESS, data);
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138
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139 p->register_exception(
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140 CYGNUM_HAL_EXCEPTION_MAX,
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141 &handler1,
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142 (CYG_ADDRWORD)&d0,
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143 &old_handler,
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144 &old_data);
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145
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146 p->register_exception(
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147 CYGNUM_HAL_EXCEPTION_MAX,
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148 &handler1,
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149 (CYG_ADDRWORD)&d0,
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150 &old_handler1,
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151 &old_data1);
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152
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153 CYG_TEST_CHECK(old_handler1 == &handler1,
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154 "register exception: old_handler not the one previously registered");
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155 CYG_TEST_CHECK(old_data1 == (CYG_ADDRWORD)&d0,
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156 "register exception: old_data not those previously registered");
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157
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158 p->deliver_exception(CYGNUM_HAL_EXCEPTION_MAX, (CYG_ADDRWORD)99);
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159
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160 CYG_TEST_INFO("handler 1 returned");
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161
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162 p->deregister_exception(CYGNUM_HAL_EXCEPTION_MAX);
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163 p->deregister_exception(CYGNUM_HAL_EXCEPTION_MAX);
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164
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165 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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166
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167 #if 0
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168 #elif defined(CYGPKG_HAL_POWERPC_SIM)
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169 // The exception generated by the SIM is not recognized by GDB.
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170 // PR 19945 workaround.
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171 CYG_TEST_NA("Not applicable to PowerPC SIM");
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172 #endif
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173
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174 for(n = CYGNUM_HAL_EXCEPTION_MIN; n <= CYGNUM_HAL_EXCEPTION_MAX; n++) {
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175 p->register_exception(
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176 n,
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177 handler0,
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178 (CYG_ADDRWORD)123,
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179 &old_handler1,
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180 &old_data1);
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181 }
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182
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183 CYG_TEST_PASS("Attempting to provoke exception");
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184
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185 cause_exception();
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186
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187 CYG_TEST_FAIL_FINISH("Couldn't cause exception");
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188 #else // CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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189 CYG_TEST_NA("Platform does not support data exceptions");
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190 #endif
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191
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192 }
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193
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194 #ifdef CYG_HAL_MIPS_TX39_JMR3904
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195
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196 externC cyg_VSR __default_exception_vsr;
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197 cyg_VSR *old_vsr;
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198
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199 #endif
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200
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201 void except0_main( void )
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202 {
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203 // Use CYG_TEST_GDBCMD _before_ CYG_TEST_INIT()
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204 CYG_TEST_GDBCMD("handle SIGBUS nostop");
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205 CYG_TEST_GDBCMD("handle SIGSEGV nostop");
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206 CYG_TEST_GDBCMD("handle SIGFPE nostop");
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207
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208 CYG_TEST_INIT();
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209
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210 #ifdef HAL_VSR_SET_TO_ECOS_HANDLER
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211 // Reclaim the VSR off CygMon possibly
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212 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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213 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_ACCESS, NULL );
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214 #endif
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215 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS
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216 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS, NULL );
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217 #endif
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218 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS
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219 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, NULL );
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220 #endif
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221 #ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION
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222 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, NULL );
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223 #endif
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224 #ifdef CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO
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225 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO, NULL );
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226 #endif
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227 #ifdef CYGNUM_HAL_EXCEPTION_FPU
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228 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU, NULL );
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229 #endif
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230 #ifdef CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO
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231 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO, NULL );
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232 #endif
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233 #endif
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234
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235 new_thread(entry0, 0);
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236
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237 Cyg_Scheduler::start();
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238
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239 CYG_TEST_FAIL_FINISH("Not reached");
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240 }
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241 externC void
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242 cyg_start( void )
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243 {
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244 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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245 cyg_hal_invoke_constructors();
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246 #endif
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247 except0_main();
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248 }
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249 #else // def CYGPKG_KERNEL_EXCEPTIONS
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250 externC void
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251 cyg_start( void )
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252 {
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253 CYG_TEST_INIT();
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254 CYG_TEST_NA("Exceptions disabled");
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255 }
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256 #endif // def CYGPKG_KERNEL_EXCEPTIONS
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257
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258 // EOF except1.cxx