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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 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 #include <pkgconf/kernel.h> |
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39 |
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40 #include <cyg/infra/testcase.h> |
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41 |
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42 #ifdef CYGPKG_KERNEL_EXCEPTIONS |
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43 |
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44 #include <cyg/kernel/sched.hxx> // Cyg_Scheduler::start() |
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45 #include <cyg/kernel/thread.hxx> // Cyg_Thread |
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46 #include <cyg/kernel/intr.hxx> // cyg_VSR |
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47 |
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48 #include <cyg/hal/hal_intr.h> // exception ranges |
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49 |
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50 #include <cyg/kernel/sched.inl> |
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51 #include <cyg/kernel/thread.inl> |
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52 |
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53 #define NTHREADS 1 |
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54 #include "testaux.hxx" |
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55 |
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56 static cyg_exception_handler handler0; |
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57 static int d0; |
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58 |
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59 static void handler0(CYG_ADDRWORD data, cyg_code number, CYG_ADDRWORD info) |
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60 { |
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61 CYG_TEST_INFO("handler 0 called"); |
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62 |
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63 CYG_TEST_CHECK((CYG_ADDRWORD)123 == data, "handler given wrong data"); |
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64 |
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65 // ignore machine specific stuff |
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66 CYG_UNUSED_PARAM(cyg_code, number); |
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67 CYG_UNUSED_PARAM(CYG_ADDRWORD, info); |
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68 |
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69 CYG_TEST_PASS_FINISH("Except 1 OK"); |
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70 } |
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71 |
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72 static void handler1(CYG_ADDRWORD data, cyg_code number, CYG_ADDRWORD info) |
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73 { |
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74 CYG_TEST_INFO("handler 1 called"); |
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75 |
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76 CYG_TEST_CHECK((CYG_ADDRWORD)&d0 == data, "handler given wrong data"); |
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77 |
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78 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE |
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79 CYG_TEST_CHECK(number == CYGNUM_HAL_EXCEPTION_MAX, "handler given wrong number"); |
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80 #else |
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81 CYG_UNUSED_PARAM(cyg_code, number); |
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82 #endif |
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83 |
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84 CYG_TEST_CHECK((CYG_ADDRWORD)99 == info, "handler given wrong info"); |
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85 } |
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86 |
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87 |
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88 // The following function attempts to cause an exception in various |
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89 // hacky ways. It is machine dependent what exception is generated. |
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90 // It does reads rather than writes hoping not to corrupt anything |
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91 // important. |
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92 void cause_exception(void) |
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93 { |
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94 int x; |
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95 unsigned int p=0; |
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96 |
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97 do { |
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98 x=*(volatile int *)(p-1)/p; |
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99 p+=0x100000; |
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100 } while(p != 0); |
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101 } |
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102 |
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103 static void entry0( CYG_ADDRWORD data ) |
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104 { |
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105 cyg_code n; |
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106 cyg_exception_handler *old_handler, *old_handler1; |
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107 CYG_ADDRWORD old_data, old_data1; |
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108 Cyg_Thread *p=Cyg_Thread::self(); |
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109 |
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110 CYG_UNUSED_PARAM(CYG_ADDRESS, data); |
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111 |
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112 p->register_exception( |
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113 CYGNUM_HAL_EXCEPTION_MAX, |
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114 &handler1, |
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115 (CYG_ADDRWORD)&d0, |
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116 &old_handler, |
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117 &old_data); |
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118 |
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119 p->register_exception( |
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120 CYGNUM_HAL_EXCEPTION_MAX, |
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121 &handler1, |
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122 (CYG_ADDRWORD)&d0, |
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123 &old_handler1, |
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124 &old_data1); |
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125 |
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126 CYG_TEST_CHECK(old_handler1 == &handler1, |
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127 "register exception: old_handler not the one previously registered"); |
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128 CYG_TEST_CHECK(old_data1 == (CYG_ADDRWORD)&d0, |
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129 "register exception: old_data not those previously registered"); |
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130 |
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131 p->deliver_exception(CYGNUM_HAL_EXCEPTION_MAX, (CYG_ADDRWORD)99); |
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132 |
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133 CYG_TEST_INFO("handler 1 returned"); |
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134 |
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135 p->deregister_exception(CYGNUM_HAL_EXCEPTION_MAX); |
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136 p->deregister_exception(CYGNUM_HAL_EXCEPTION_MAX); |
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137 |
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138 #ifdef CYGPKG_HAL_I386_LINUX |
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139 // We can't catch segmentation violation exceptions on Linux. |
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140 CYG_TEST_PASS_FINISH("Except 1 OK"); |
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141 #endif |
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142 |
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143 for(n = CYGNUM_HAL_EXCEPTION_MIN; n <= CYGNUM_HAL_EXCEPTION_MAX; n++) { |
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144 p->register_exception( |
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145 n, |
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146 handler0, |
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147 (CYG_ADDRWORD)123, |
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148 &old_handler1, |
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149 &old_data1); |
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150 } |
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151 |
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152 CYG_TEST_PASS("Attempting to provoke exception"); |
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153 |
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154 cause_exception(); |
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155 |
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156 CYG_TEST_FAIL_FINISH("Couldn't cause exception"); |
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157 } |
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158 |
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159 #ifdef CYG_HAL_TX39_JMR3904 |
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160 |
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161 externC cyg_VSR __default_exception_vsr; |
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162 cyg_VSR *old_vsr; |
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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 // Use CYG_TEST_GDBCMD _before_ CYG_TEST_INIT() |
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169 CYG_TEST_GDBCMD("handle SIGBUS nostop"); |
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170 CYG_TEST_GDBCMD("handle SIGSEGV nostop"); |
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171 |
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172 CYG_TEST_INIT(); |
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173 |
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174 #ifdef HAL_VSR_SET_TO_ECOS_HANDLER |
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175 // Reclaim the VSR off CygMon possibly |
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176 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS |
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177 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_ACCESS, NULL ); |
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178 #endif |
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179 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS |
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180 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, NULL ); |
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181 #endif |
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182 #ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION |
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183 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, NULL ); |
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184 #endif |
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185 #endif |
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186 |
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187 new_thread(entry0, 0); |
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188 |
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189 Cyg_Scheduler::start(); |
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190 |
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191 CYG_TEST_FAIL_FINISH("Not reached"); |
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192 } |
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193 externC void |
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194 cyg_start( void ) |
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195 { |
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196 except0_main(); |
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197 } |
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198 #else // def CYGPKG_KERNEL_EXCEPTIONS |
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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_NA("Exceptions disabled"); |
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204 } |
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205 #endif // def CYGPKG_KERNEL_EXCEPTIONS |
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206 |
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207 // EOF except1.cxx |
