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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // except.cxx
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4 //
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5 // POSIX exception translation
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6 //
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7 //==========================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
208
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): nickg
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43 // Contributors: nickg
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44 // Date: 2000-03-27
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45 // Purpose: POSIX exception translation
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46 // Description: This file contains code to translate eCos hardware
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47 // exceptions into POSIX signals.
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48 //
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49 //
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #include <pkgconf/hal.h>
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56 #include <pkgconf/kernel.h>
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57 #include <pkgconf/posix.h>
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58
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59 #include <cyg/kernel/ktypes.h> // base kernel types
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60 #include <cyg/infra/cyg_trac.h> // tracing macros
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61 #include <cyg/infra/cyg_ass.h> // assertion macros
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62
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63 #include <cyg/infra/diag.h>
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64
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65 #include "pprivate.h" // POSIX private header
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66
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67 #include <signal.h> // our header
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68
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69 #include <cyg/kernel/thread.inl>
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70
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71 //==========================================================================
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72 // Translation table from eCos exceptions to POSIX signals.
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73
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74 static const struct
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75 {
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76 cyg_code exception;
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77 int signal;
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78 } exception_signal_mapping[] =
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79 {
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80 #ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
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81 {CYGNUM_HAL_EXCEPTION_DATA_ACCESS, SIGBUS},
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82 #endif
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83 #ifdef CYGNUM_HAL_EXCEPTION_DATA_WRITE
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84 {CYGNUM_HAL_EXCEPTION_DATA_WRITE, SIGBUS},
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85 #endif
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86 #ifdef CYGNUM_HAL_EXCEPTION_CODE_ACCESS
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87 {CYGNUM_HAL_EXCEPTION_CODE_ACCESS, SIGBUS},
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88 #endif
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89 #ifdef CYGNUM_HAL_EXCEPTION_CODE_WRITE
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90 {CYGNUM_HAL_EXCEPTION_CODE_WRITE, SIGBUS},
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91 #endif
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92 #ifdef CYGNUM_HAL_EXCEPTION_CODE_EXECUTE
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93 {CYGNUM_HAL_EXCEPTION_CODE_EXECUTE, SIGBUS},
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94 #endif
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95 #ifdef CYGNUM_HAL_EXCEPTION_IO_ACCESS
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96 {CYGNUM_HAL_EXCEPTION_IO_ACCESS, SIGBUS},
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97 #endif
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98 #ifdef CYGNUM_HAL_EXCEPTION_IO_WRITE
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99 {CYGNUM_HAL_EXCEPTION_IO_ACCESS, SIGBUS},
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100 #endif
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101 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS
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102 {CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS, SIGSEGV},
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103 #endif
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104 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_WRITE
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105 {CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_WRITE, SIGSEGV},
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106 #endif
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107 #ifdef CYGNUM_HAL_EXCEPTION_CODE_TLBMISS_ACCESS
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108 {CYGNUM_HAL_EXCEPTION_CODE_TLBMISS_ACCESS, SIGSEGV},
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109 #endif
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110 #ifdef CYGNUM_HAL_EXCEPTION_CODE_TLBMISS_WRITE
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111 {CYGNUM_HAL_EXCEPTION_CODE_TLBMISS_WRITE, SIGSEGV},
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112 #endif
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113 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBERROR_ACCESS
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114 {CYGNUM_HAL_EXCEPTION_DATA_TLBERROR_ACCESS, SIGSEGV},
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115 #endif
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116 #ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBERROR_WRITE
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117 {CYGNUM_HAL_EXCEPTION_DATA_TLBERROR_WRITE, SIGSEGV},
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118 #endif
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119 #ifdef CYGNUM_HAL_EXCEPTION_CODE_TLBERROR_ACCESS
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120 {CYGNUM_HAL_EXCEPTION_CODE_TLBERROR_ACCESS, SIGSEGV},
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121 #endif
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122 #ifdef CYGNUM_HAL_EXCEPTION_CODE_TLBERROR_WRITE
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123 {CYGNUM_HAL_EXCEPTION_CODE_TLBERROR_WRITE, SIGSEGV},
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124 #endif
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125 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS
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126 {CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, SIGBUS},
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127 #endif
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128 #ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_WRITE
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129 {CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_WRITE, SIGBUS},
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130 #endif
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131 #ifdef CYGNUM_HAL_EXCEPTION_IO_UNALIGNED_ACCESS
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132 {CYGNUM_HAL_EXCEPTION_IO_UNALIGNED_ACCESS, SIGBUS},
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133 #endif
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134 #ifdef CYGNUM_HAL_EXCEPTION_IO_UNALIGNED_WRITE
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135 {CYGNUM_HAL_EXCEPTION_IO_UNALIGNED_WRITE, SIGBUS},
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136 #endif
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137 #ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION
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138 {CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, SIGILL},
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139 #endif
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140 #ifdef CYGNUM_HAL_EXCEPTION_INTERRUPT
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141 {CYGNUM_HAL_EXCEPTION_INTERRUPT, SIGINT},
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142 #endif
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143 #ifdef CYGNUM_HAL_EXCEPTION_TRAP
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144 {CYGNUM_HAL_EXCEPTION_TRAP, SIGTRAP},
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145 #endif
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146 #ifdef CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO
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147 {CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO, SIGFPE},
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148 #endif
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149 #ifdef CYGNUM_HAL_EXCEPTION_OVERFLOW
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150 {CYGNUM_HAL_EXCEPTION_OVERFLOW, SIGFPE},
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151 #endif
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152 #ifdef CYGNUM_HAL_EXCEPTION_BOUNDS
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153 {CYGNUM_HAL_EXCEPTION_BOUNDS, SIGSEGV},
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154 #endif
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155 #ifdef CYGNUM_HAL_EXCEPTION_SINGLE_STEP
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156 {CYGNUM_HAL_EXCEPTION_SINGLE_STEP, SIGTRAP},
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157 #endif
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158 #ifdef CYGNUM_HAL_EXCEPTION_INSTRUCTION_BP
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159 {CYGNUM_HAL_EXCEPTION_INSTRUCTION_BP, SIGTRAP},
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160 #endif
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161 #ifdef CYGNUM_HAL_EXCEPTION_PERIPHERAL_BP
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162 {CYGNUM_HAL_EXCEPTION_PERIPHERAL_BP, SIGTRAP},
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163 #endif
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164 #ifdef CYGNUM_HAL_EXCEPTION_DATA_BP
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165 {CYGNUM_HAL_EXCEPTION_DATA_BP, SIGTRAP},
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166 #endif
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167 #ifdef CYGNUM_HAL_EXCEPTION_DEVELOPMENT_BP
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168 {CYGNUM_HAL_EXCEPTION_DEVELOPMENT_BP, SIGTRAP},
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169 #endif
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170 #ifdef CYGNUM_HAL_EXCEPTION_STACK_OVERFLOW
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171 {CYGNUM_HAL_EXCEPTION_STACK_OVERFLOW, SIGSEGV},
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172 #endif
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173 #ifdef CYGNUM_HAL_EXCEPTION_STACK_FAULT
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174 {CYGNUM_HAL_EXCEPTION_STACK_FAULT, SIGSEGV},
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175 #endif
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176 #ifdef CYGNUM_HAL_EXCEPTION_PARITY
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177 {CYGNUM_HAL_EXCEPTION_PARITY, SIGBUS},
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178 #endif
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179 #ifdef CYGNUM_HAL_EXCEPTION_FPU
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180 {CYGNUM_HAL_EXCEPTION_FPU, SIGFPE},
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181 #endif
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182 #ifdef CYGNUM_HAL_EXCEPTION_FPU_NOT_AVAIL
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183 {CYGNUM_HAL_EXCEPTION_FPU_NOT_AVAIL, SIGFPE},
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184 #endif
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185 #ifdef CYGNUM_HAL_EXCEPTION_FPU_OVERFLOW
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186 {CYGNUM_HAL_EXCEPTION_FPU_OVERFLOW, SIGFPE},
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187 #endif
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188 #ifdef CYGNUM_HAL_EXCEPTION_FPU_UNDERFLOW
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189 {CYGNUM_HAL_EXCEPTION_FPU_UNDERFLOW, SIGFPE},
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190 #endif
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191 #ifdef CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO
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192 {CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO, SIGFPE},
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193 #endif
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194 #ifdef CYGNUM_HAL_EXCEPTION_SYSTEM_CALL
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195 {CYGNUM_HAL_EXCEPTION_SYSTEM_CALL, SIGSYS},
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196 #endif
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197 {0, 0} // dummy value to ensure compiler is happy
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198 };
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199
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200 //==========================================================================
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201 // POSIX exception handler
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202
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203 static void cyg_posix_exception_handler(
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204 CYG_ADDRWORD data, // user supplied data == signal number
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205 cyg_code exception_number, // exception being raised
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206 CYG_ADDRWORD exception_info // any exception specific info
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207 )
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208 {
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209 int signo = 0;
161
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210
115
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211 pthread_info *self = pthread_self_info();
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212
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213 if( self == NULL )
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214 {
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215 // Not a POSIX thread, just return
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216 return;
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217 }
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218
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219 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
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220
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221 signo = data;
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222
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223 #else
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224
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225 for( int i = 0; exception_signal_mapping[i].signal != 0; i++ )
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226 {
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227 if( exception_signal_mapping[i].exception == exception_number )
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228 {
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229 signo = exception_signal_mapping[i].signal;
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230 break;
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231 }
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232 }
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233
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234 #endif
161
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235
115
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236 if( sigismember( &self->sigmask, signo ) )
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237 {
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238 // The signal is masked in the current thread. POSIX says that
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239 // the behaviour is undefined here. We choose to ignore it.
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240
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241 return;
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242 }
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243
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244 // The kernel exception handler may have disabled interrupts, so
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245 // we (re-)enable them here. From this point on we are running in
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246 // a context that is effectively just pushed onto the stack of the
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247 // current thread. If we return we will unwind and resume
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248 // execution from the excepting code. We can also, in theory,
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249 // longjump out of the signal handler, and although that is
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250 // deprecated, we make sure in cyg_deliver_signals() that it is
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251 // possible to do it.
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252
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253 HAL_ENABLE_INTERRUPTS();
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254
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255 struct sigevent sev;
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256
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257 sev.sigev_notify = SIGEV_SIGNAL;
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258 sev.sigev_signo = signo;
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259 sev.sigev_value.sival_ptr = (void *)exception_info;
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260
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261 // Generate the signal
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262 cyg_sigqueue( &sev, SI_EXCEPT );
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263
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264 // And try to deliver it
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265 cyg_deliver_signals();
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266 }
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267
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268 //==========================================================================
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269 // Install all the exception handlers
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270
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271 static void install_handlers( Cyg_Thread *thread)
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272 {
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273 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
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274
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275 // With decoded exceptions, we must install a separate exception
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276 // handler for each supported exception.
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277
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278 for( int i = 0; exception_signal_mapping[i].signal != 0; i++ )
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279 {
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280 thread->register_exception( exception_signal_mapping[i].exception,
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281 cyg_posix_exception_handler,
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6f68e28560d3 * src/except.cxx (install_handlers): Fixed typo. Bug #1000373
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282 exception_signal_mapping[i].signal,
115
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283 NULL,
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284 NULL);
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285 }
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286
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287 #else
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288
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289 // Otherwise there is just one exception handler for all exceptions.
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290
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291 thread->register_exception( CYGNUM_HAL_EXCEPTION_MIN,
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292 cyg_posix_exception_handler,
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293 0,
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294 NULL,
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295 NULL);
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296
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297 #endif
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298
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299 }
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300
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301 //==========================================================================
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302 // Initialization
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303
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304 externC void cyg_posix_exception_start()
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305 {
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306 #ifdef CYGSEM_KERNEL_EXCEPTIONS_GLOBAL
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307
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308 // With global exceptions, we only need to install a single static
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309 // set of exception handlers. Note that by this point in system
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310 // initialization the idle thread should be installed as the
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311 // current thread, so we pass a pointer to that to
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312 // install_handlers(). The identity of the thread passed is
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313 // actually irrelevant in this case and is just used as a handle
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314 // into the thread class.
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315
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316 install_handlers( Cyg_Thread::self() );
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317
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318 #endif
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319 }
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320
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321 //==========================================================================
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322 // Per thread exception initialization and destruction
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323
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324 externC void cyg_pthread_exception_init(pthread_info *thread)
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325 {
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326 #ifndef CYGSEM_KERNEL_EXCEPTIONS_GLOBAL
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327
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328 // With non-global exceptions we must install a new set of handlers
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329 // for each thread.
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330
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331 install_handlers( thread->thread );
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332
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333 #endif
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334 }
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335
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336 externC void cyg_pthread_exception_destroy(pthread_info *thread)
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337 {
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338 // Nothing to do at present.
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339 }
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340
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341 // -------------------------------------------------------------------------
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342 // EOF except.cxx