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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) 1998,1999 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, jlarmour |
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34 // Date: 1999-02-16 |
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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/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL |
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40 |
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41 #include <cyg/kernel/kapi.h> |
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42 |
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43 #include <cyg/infra/testcase.h> |
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44 |
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45 #ifdef CYGPKG_KERNEL_EXCEPTIONS |
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46 |
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47 #ifdef CYGFUN_KERNEL_API_C |
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48 |
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49 #include <cyg/hal/hal_intr.h> // exception ranges |
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50 |
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51 #include "testaux.h" |
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52 |
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53 #define NTHREADS 1 |
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54 #define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL |
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55 |
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56 static cyg_handle_t thread[NTHREADS]; |
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57 |
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58 static cyg_thread thread_obj[NTHREADS]; |
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59 static char stack[NTHREADS][STACKSIZE]; |
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60 |
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61 |
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62 static cyg_exception_handler_t handler0; |
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63 static int d0; |
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64 |
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65 static void handler0(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info) |
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66 { |
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67 CYG_TEST_INFO("handler 0 called"); |
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68 |
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69 CYG_TEST_CHECK((cyg_addrword_t)123 == data, "handler given wrong data"); |
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70 |
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71 // ignore machine specific stuff |
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72 CYG_UNUSED_PARAM(cyg_code_t, number); |
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73 CYG_UNUSED_PARAM(cyg_addrword_t, info); |
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74 |
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75 CYG_TEST_PASS_FINISH("Except 1 OK"); |
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76 } |
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77 |
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78 static void handler1(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info) |
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79 { |
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80 CYG_TEST_INFO("handler 1 called"); |
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81 |
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82 CYG_TEST_CHECK((cyg_addrword_t)&d0 == data, "handler given wrong data"); |
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83 |
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84 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE |
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85 CYG_TEST_CHECK(number == CYGNUM_HAL_EXCEPTION_MAX, "handler given wrong number"); |
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86 #else |
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87 CYG_UNUSED_PARAM(cyg_code_t, number); |
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88 #endif |
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89 |
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90 CYG_TEST_CHECK((cyg_addrword_t)99 == info, "handler given wrong info"); |
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91 } |
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92 |
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93 |
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94 // The following function attempts to cause an exception in various |
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95 // hacky ways. It is machine dependent what exception is generated. |
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96 // It does reads rather than writes hoping not to corrupt anything |
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97 // important. |
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98 void cause_exception(void) |
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99 { |
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100 int x; |
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101 unsigned int p=0; |
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102 |
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103 do { |
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104 x=*(volatile int *)(p-1)/p; |
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105 p+=0x100000; |
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106 } while(p != 0); |
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107 } |
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108 |
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109 static void entry0( CYG_ADDRWORD data ) |
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110 { |
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111 cyg_code_t n; |
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112 cyg_exception_handler_t *old_handler, *old_handler1; |
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113 cyg_addrword_t old_data, old_data1; |
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114 |
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115 CYG_UNUSED_PARAM(CYG_ADDRESS, data); |
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116 |
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117 cyg_exception_set_handler( |
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118 CYGNUM_HAL_EXCEPTION_MAX, |
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119 &handler1, |
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120 (cyg_addrword_t)&d0, |
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121 &old_handler, |
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122 &old_data); |
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123 |
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124 cyg_exception_set_handler( |
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125 CYGNUM_HAL_EXCEPTION_MAX, |
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126 &handler1, |
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127 (cyg_addrword_t)&d0, |
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128 &old_handler1, |
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129 &old_data1); |
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130 |
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131 CYG_TEST_CHECK(old_handler1 == &handler1, |
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132 "register exception: old_handler not the one previously registered"); |
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133 CYG_TEST_CHECK(old_data1 == (cyg_addrword_t)&d0, |
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134 "register exception: old_data not those previously registered"); |
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135 |
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136 cyg_exception_call_handler( |
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137 cyg_thread_self(), |
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138 CYGNUM_HAL_EXCEPTION_MAX, |
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139 (cyg_addrword_t)99); |
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140 |
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141 CYG_TEST_INFO("handler 1 returned"); |
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142 |
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143 cyg_exception_clear_handler(CYGNUM_HAL_EXCEPTION_MAX); |
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144 cyg_exception_clear_handler(CYGNUM_HAL_EXCEPTION_MAX); |
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145 |
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146 #ifdef CYGPKG_HAL_I386_LINUX |
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147 // We can't catch segmentation violation exceptions on Linux. |
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148 CYG_TEST_PASS_FINISH("Except 1 OK"); |
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149 #endif |
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150 |
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151 for(n = CYGNUM_HAL_EXCEPTION_MIN; n <= CYGNUM_HAL_EXCEPTION_MAX; n++) { |
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152 cyg_exception_set_handler( |
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153 n, |
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154 handler0, |
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155 (cyg_addrword_t)123, |
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156 &old_handler1, |
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157 &old_data1); |
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158 } |
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159 |
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160 CYG_TEST_PASS("Attempting to provoke exception"); |
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161 |
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162 cause_exception(); |
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163 |
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164 CYG_TEST_FAIL_FINISH("Couldn't cause exception"); |
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165 } |
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166 |
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167 #ifdef CYG_HAL_TX39_JMR3904 |
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168 |
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169 extern void __default_exception_vsr(void); |
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170 |
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171 #endif |
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172 |
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173 void except0_main( void ) |
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174 { |
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175 // Use CYG_TEST_GDBCMD _before_ CYG_TEST_INIT() |
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176 CYG_TEST_GDBCMD("handle SIGBUS nostop"); |
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177 CYG_TEST_GDBCMD("handle SIGSEGV nostop"); |
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178 |
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179 CYG_TEST_INIT(); |
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180 |
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181 #ifdef HAL_VSR_SET_TO_ECOS_HANDLER |
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182 // Reclaim the VSR off CygMon possibly |
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183 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS |
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184 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_ACCESS, NULL ); |
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185 #endif |
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186 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS |
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187 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, NULL ); |
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188 #endif |
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189 #ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION |
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190 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, NULL ); |
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191 #endif |
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192 #endif |
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193 |
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194 cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kexcept1", |
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195 (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]); |
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196 cyg_thread_resume(thread[0]); |
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197 |
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198 cyg_scheduler_start(); |
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199 |
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200 CYG_TEST_FAIL_FINISH("Not reached"); |
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201 } |
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202 |
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203 externC void |
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204 cyg_start( void ) |
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205 { |
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206 except0_main(); |
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207 } |
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208 |
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209 #else // def CYGFUN_KERNEL_API_C |
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210 #define N_A_MSG "Kernel C API layer disabled" |
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211 #endif // def CYGFUN_KERNEL_API_C |
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212 #else // def CYGPKG_KERNEL_EXCEPTIONS |
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213 #define N_A_MSG "Exceptions disabled" |
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214 #endif // def CYGPKG_KERNEL_EXCEPTIONS |
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215 |
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216 #ifdef N_A_MSG |
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217 externC void |
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218 cyg_start( void ) |
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219 { |
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220 CYG_TEST_INIT(); |
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221 CYG_TEST_NA( N_A_MSG); |
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222 } |
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223 #endif // N_A_MSG |
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224 |
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225 /* EOF kexcept1.c */ |
