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annotate packages/language/c/libc/signals/current/tests/signal2.c @ 124:0ec04793409a ecos-sw-2000-09-11

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Merge from eCos master repository on 2000-09-11-03:00:13-BST
author jlarmour
date Mon, 11 Sep 2000 02:42:46 +0000
parents 6ed91473a1cd
children 518f42066aba
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1 //========================================================================
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2 //
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3 // signal2.c
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4 //
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5 // ISO C signal handling test
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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 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): jlarmour
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35 // Contributors:
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36 // Date: 2000-04-18
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37 // Purpose: Test hardware signal functionality
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38 // Description: This file contains a number of tests for ISO C signal
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39 // handling when used with hardware exceptions
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40 // Usage:
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //========================================================================
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45
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46 // CONFIGURATION
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47
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48 #include <pkgconf/system.h>
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49 #include <pkgconf/libc_signals.h> // C library signals configuration
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50
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51 // INCLUDES
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52
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53 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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54 #include <cyg/infra/testcase.h> // Test infrastructure
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55
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56 #ifdef CYGSEM_LIBC_SIGNALS_HWEXCEPTIONS
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57
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58 #include <cyg/hal/hal_intr.h> // exception ranges &
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59 // HAL_VSR_SET_TO_ECOS_HANDLER
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60
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61 #include <signal.h> // Signal functions
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62 #include <setjmp.h> // setjmp(), longjmp()
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63
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64 // STATICS
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65
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66 static int state;
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67 static jmp_buf jbuf;
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68 #endif
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69
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70 // FUNCTIONS
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71
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72 #ifdef CYGSEM_LIBC_SIGNALS_HWEXCEPTIONS
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73
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74 static void
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75 myhandler(int sig)
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76 {
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77 __sighandler_t handler1;
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78
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79 CYG_TEST_INFO("myhandler() called");
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80 ++state;
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81
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82 handler1 = signal(sig, &myhandler);
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83
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84 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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85 "handler reset itself to default");
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86
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87 longjmp(jbuf, 1);
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88 } // myhandler()
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89
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90 static void
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91 cause_memerror(void)
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92 {
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93 volatile int x;
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94 volatile CYG_ADDRESS p=(CYG_ADDRESS) &state;
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95
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96 do {
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97 // do a read which prevents us accidentally writing over something
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98 // important. Make it misaligned to increase the chances of an
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99 // exception happening
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100 x = *(volatile int *)(p+1);
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101 p += (CYG_ADDRESS)0x100000;
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102 } while(p != 0);
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103 } // cause_memerror()
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104
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105 // num must always be 0 - do it this way in case the optimizer tries to
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106 // get smart
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107 static int
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108 cause_fpe(int num)
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109 {
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110 double a;
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111
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112 a = 1.0/num; // Depending on FPU emulation and/or
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113 // the FPU architecture, this may
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114 // cause an exception.
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115 // (float division by zero)
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116
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117 return ((int)a)/num; // This may cause an exception if
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118 // the architecture supports it.
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119 // (integer division by zero).
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120 } // cause_fpe()
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121
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122 #endif
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123
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124 int
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125 main( int argc, char *argv[] )
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126 {
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127 #ifdef CYGSEM_LIBC_SIGNALS_HWEXCEPTIONS
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128 __sighandler_t handler1;
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129
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130 // special callout to request GDB to alter its handling of signals
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131 CYG_TEST_GDBCMD("handle SIGBUS nostop");
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132 CYG_TEST_GDBCMD("handle SIGSEGV nostop");
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133 CYG_TEST_GDBCMD("handle SIGILL nostop");
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134 CYG_TEST_GDBCMD("handle SIGFPE nostop");
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135 CYG_TEST_GDBCMD("handle SIGSYS nostop");
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136
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137 // Not sure about this - Jifl. Do any of our targets generate SIGTRAP anyway?
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138 #if 0
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139 #ifndef CYGPKG_HAL_I386_LINUX
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140 CYG_TEST_GDBCMD("handle SIGTRAP nostop pass");
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141 #endif
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142 #endif
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143 #endif // ifdef CYGSEM_LIBC_SIGNALS_HWEXCEPTIONS
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144
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145 CYG_TEST_INIT();
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146
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147 #ifdef CYGSEM_LIBC_SIGNALS_HWEXCEPTIONS
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148 // Avoid compiler warnings if tests are not applicable.
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149 if (0) cause_memerror();
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150 if (0) cause_fpe(0);
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151 #endif
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152
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153 CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C "
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154 "library signal functions");
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155
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156 // Now reset the exception handlers various to eCos handlers so that we
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157 // have control; this is the target side equivalent of the CYG_TEST_GDBCMD
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158 // lines above:
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159 #ifdef HAL_VSR_SET_TO_ECOS_HANDLER
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160 // Reclaim the VSR off CygMon possibly
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161 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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162 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_ACCESS, NULL );
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163 #endif
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164 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS
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165 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS, NULL );
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166 #endif
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167 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS
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168 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, NULL );
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169 #endif
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170 #ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION
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171 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, NULL );
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172 #endif
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173 #ifdef CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO
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174 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO, NULL );
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175 #endif
124
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176 #ifdef CYGNUM_HAL_EXCEPTION_FPU
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177 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU, NULL );
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178 #endif
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179 #ifdef CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO
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180 HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO, NULL );
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181 #endif
115
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182 #endif
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183
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184 #ifdef CYGSEM_LIBC_SIGNALS_HWEXCEPTIONS
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185
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186
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187 // Test 1
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188
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189 CYG_TEST_INFO("Test 1");
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190
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191 handler1 = signal(SIGSEGV, &myhandler);
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192
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193 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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194 "SIGSEGV handler initialized to default");
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195
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196
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197 handler1 = signal(SIGBUS, &myhandler);
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198
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199 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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200 "SIGBUS handler initialized to default");
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201
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202
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203 handler1 = signal(SIGILL, &myhandler);
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204
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205 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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206 "SIGILL handler initialized to default");
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207
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208 handler1 = signal(SIGSYS, &myhandler);
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209
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210 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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211 "SIGSYS handler initialized to default");
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212
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213 handler1 = signal(SIGTRAP, &myhandler);
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214
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215 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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216 "SIGTRAP handler initialized to default");
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217
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218 handler1 = signal(SIGFPE, &myhandler);
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219
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220 CYG_TEST_PASS_FAIL(handler1 == SIG_DFL,
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221 "SIGFPE handler initialized to default");
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222
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223 // Test 2
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224
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225 CYG_TEST_INFO("Test 2");
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226
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227 state = 2;
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228
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229 #if defined(CYGPKG_HAL_POWERPC_SIM)
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230 // The exception generated by the SIM is not recognized by GDB.
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231 // PR 19945 workaround.
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232 CYG_TEST_PASS("Test 2 not applicable to PowerPC SIM");
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233 #else
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234 if (0==setjmp(jbuf)) {
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235 cause_memerror();
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236 CYG_TEST_FAIL("Didn't cause exception");
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237 }
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238
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239 CYG_TEST_PASS_FAIL(3==state, "handler returned correctly");
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240 #endif
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241
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242 // Test 3
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243
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244 CYG_TEST_INFO("Test 3");
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245
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246 state = 3;
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247
124
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248 #if defined(CYGPKG_HAL_SH_7708)
115
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249 CYG_TEST_PASS("Test 3 not applicable to sh 7708");
124
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250 #elif defined(CYGPKG_HAL_SH_7709A)
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251 CYG_TEST_PASS("Test 3 not applicable to sh 7709A");
115
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252 #elif defined(CYGPKG_HAL_MN10300)
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253 CYG_TEST_PASS("Test 3 not applicable to mn10300");
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254 #elif defined(CYGPKG_HAL_MIPS_TX39)
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255 CYG_TEST_PASS("Test 3 not applicable to mips-tx39");
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256 #elif defined(CYGPKG_HAL_SPARCLITE)
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257 CYG_TEST_PASS("Test 3 not applicable to sparclite");
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258 #elif defined(CYGPKG_HAL_I386_LINUX)
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259 CYG_TEST_PASS("Test 3 not applicable to i386/Linux");
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260 // See linux.S for details.
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261 #elif defined(CYGPKG_HAL_POWERPC)
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262 CYG_TEST_PASS("Test 3 not applicable to PowerPC");
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263 #elif defined(CYGPKG_HAL_ARM)
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264 CYG_TEST_PASS("Test 3 not applicable to ARM");
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265 #else
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266
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267 if (0==setjmp(jbuf)) {
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268 (void)cause_fpe(0);
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269 CYG_TEST_FAIL("Didn't cause exception");
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270 }
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271
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272 CYG_TEST_PASS_FAIL(4==state, "handler returned correctly");
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273 #endif
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274
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275 #else
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276 CYG_TEST_NA("Testing not applicable to this configuration");
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277 #endif
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278
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279 CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for C "
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280 "library signal functions");
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281
124
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282 return 0;
115
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283 } // main()
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284
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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285 // EOF signal2.c