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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 //================================================================= |
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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 Cygnus eCos Public License |
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12 // Version 1.0 (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://sourceware.cygnus.com/ecos |
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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 Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //================================================================= |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): dsm |
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33 // Contributors: dsm |
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34 // Date: 1998-06-15 |
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35 // Description: Test basic exception functionality |
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36 //####DESCRIPTIONEND#### |
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37 */ |
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38 |
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39 #include <cyg/kernel/kapi.h> |
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40 |
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41 #include <cyg/infra/testcase.h> |
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42 |
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43 #ifdef CYGPKG_KERNEL_EXCEPTIONS |
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44 |
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45 #ifdef CYGFUN_KERNEL_API_C |
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46 |
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47 #include <cyg/hal/hal_intr.h> // exception ranges |
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48 |
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49 #include "testaux.h" |
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50 |
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51 #define NTHREADS 1 |
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52 #define STACKSIZE 4096 |
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53 |
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54 static cyg_handle_t thread[NTHREADS]; |
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55 |
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56 static cyg_thread thread_obj[NTHREADS]; |
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57 static char stack[NTHREADS][STACKSIZE]; |
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58 |
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59 |
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60 static cyg_exception_handler_t handler0; |
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61 static int d0; |
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62 |
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63 static void handler0(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info) |
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64 { |
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65 CYG_TEST_INFO("handler 0 called"); |
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66 |
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67 CYG_TEST_CHECK((cyg_addrword_t)123 == data, "handler given wrong data"); |
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68 |
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69 // ignore machine specific stuff |
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70 CYG_UNUSED_PARAM(cyg_code_t, number); |
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71 CYG_UNUSED_PARAM(cyg_addrword_t, info); |
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72 |
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73 CYG_TEST_PASS_FINISH("Except 1 OK"); |
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74 } |
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75 |
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76 static void handler1(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t 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_t)&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 == CYG_EXCEPTION_MAX, "handler given wrong number"); |
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84 #else |
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85 CYG_UNUSED_PARAM(cyg_code_t, number); |
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86 #endif |
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87 |
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88 CYG_TEST_CHECK((cyg_addrword_t)99 == info, "handler given wrong info"); |
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89 } |
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90 |
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91 |
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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 void cause_exception(void) |
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97 { |
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98 int x; |
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99 unsigned int p=0; |
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100 |
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101 do { |
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102 x=*(volatile int *)(p-1)/p; |
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103 p+=0x100000; |
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104 } while(p != 0); |
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105 } |
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106 |
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107 static void entry0( CYG_ADDRWORD data ) |
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108 { |
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109 cyg_code_t n; |
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110 cyg_exception_handler_t *old_handler, *old_handler1; |
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111 cyg_addrword_t old_data, old_data1; |
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112 |
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113 CYG_UNUSED_PARAM(CYG_ADDRESS, data); |
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114 |
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115 cyg_exception_set_handler( |
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116 CYG_EXCEPTION_MAX, |
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117 &handler1, |
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118 (cyg_addrword_t)&d0, |
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119 &old_handler, |
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120 &old_data); |
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121 |
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122 cyg_exception_set_handler( |
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123 CYG_EXCEPTION_MAX, |
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124 &handler1, |
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125 (cyg_addrword_t)&d0, |
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126 &old_handler1, |
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127 &old_data1); |
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128 |
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129 CYG_TEST_CHECK(old_handler1 == &handler1, |
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130 "register exception: old_handler not the one previously registered"); |
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131 CYG_TEST_CHECK(old_data1 == (cyg_addrword_t)&d0, |
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132 "register exception: old_data not those previously registered"); |
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133 |
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134 cyg_exception_call_handler( |
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135 cyg_thread_self(), |
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136 CYG_EXCEPTION_MAX, |
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137 (cyg_addrword_t)99); |
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138 |
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139 CYG_TEST_INFO("handler 1 returned"); |
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140 |
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141 cyg_exception_clear_handler(CYG_EXCEPTION_MAX); |
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142 cyg_exception_clear_handler(CYG_EXCEPTION_MAX); |
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143 |
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144 for(n = CYG_EXCEPTION_MIN; n <= CYG_EXCEPTION_MAX; n++) { |
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145 cyg_exception_set_handler( |
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146 n, |
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147 handler0, |
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148 (cyg_addrword_t)123, |
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149 &old_handler1, |
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150 &old_data1); |
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151 } |
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152 |
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153 CYG_TEST_INFO("Attempting to provoke exception"); |
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154 |
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155 cause_exception(); |
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156 |
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157 CYG_TEST_FAIL_FINISH("Couldn't cause exception"); |
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158 } |
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159 |
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160 #ifdef CYG_HAL_TX39_JMR3904 |
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161 |
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162 extern void __default_exception_vsr(void); |
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163 |
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164 #endif |
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165 |
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166 void except0_main( void ) |
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167 { |
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168 CYG_TEST_INIT(); |
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169 |
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170 #ifdef CYG_HAL_TX39_JMR3904 |
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171 |
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172 cyg_interrupt_set_vsr( CYG_VECTOR_LOAD_ADDRESS, __default_exception_vsr ); |
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173 |
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174 #endif |
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175 |
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176 cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kexcept1", |
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177 (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]); |
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178 cyg_thread_resume(thread[0]); |
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179 |
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180 cyg_scheduler_start(); |
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181 |
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182 CYG_TEST_FAIL_FINISH("Not reached"); |
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183 } |
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184 |
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185 externC void |
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186 cyg_start( void ) |
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187 { |
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188 except0_main(); |
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189 } |
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190 |
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191 #else // def CYGFUN_KERNEL_API_C |
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192 #define N_A_MSG "Kernel C API layer disabled" |
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193 #endif // def CYGFUN_KERNEL_API_C |
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194 #else // def CYGPKG_KERNEL_EXCEPTIONS |
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195 #define N_A_MSG "Exceptions disabled" |
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196 #endif // def CYGPKG_KERNEL_EXCEPTIONS |
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197 |
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198 #ifdef N_A_MSG |
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199 externC void |
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200 cyg_start( void ) |
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201 { |
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202 CYG_TEST_INIT(); |
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203 CYG_TEST_PASS_FINISH( "N/A: " N_A_MSG); |
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204 } |
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205 #endif // N_A_MSG |
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206 |
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207 /* EOF kexcept1.c */ |
