1 | /* |
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2 | ************************************************************************** |
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3 | * |
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4 | * Component = |
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5 | * |
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6 | * Synopsis = rdbg/powerpc/excep_f.c |
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7 | * |
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8 | * $Id$ |
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9 | * |
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10 | ************************************************************************** |
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11 | */ |
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12 | |
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13 | #include <rtems.h> |
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14 | #include <rtems/error.h> |
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15 | #include <assert.h> |
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16 | #include <errno.h> |
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17 | #include <rdbg/rdbg.h> |
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18 | #include <rdbg/servrpc.h> |
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19 | |
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20 | int |
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21 | ExcepToSig (Exception_context *ctx) |
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22 | { |
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23 | int excep = getExcNum (ctx); |
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24 | |
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25 | switch (excep) { |
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26 | case ASM_FLOAT_VECTOR : return SIGFPE; |
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27 | |
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28 | case ASM_TRACE_VECTOR : |
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29 | case ASM_PROG_VECTOR : |
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30 | case ASM_SYS_VECTOR : return SIGTRAP; |
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31 | |
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32 | case ASM_ISI_VECTOR : return SIGSEGV; |
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33 | |
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34 | case ASM_RESET_VECTOR : |
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35 | case ASM_MACH_VECTOR : |
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36 | case ASM_EXT_VECTOR : |
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37 | case ASM_ALIGN_VECTOR : return SIGILL; |
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38 | |
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39 | default: |
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40 | break; |
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41 | } |
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42 | return SIGKILL; |
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43 | } |
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44 | |
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45 | |
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46 | /*----- Breakpoint Exception management -----*/ |
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47 | |
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48 | /* |
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49 | * Handler for Breakpoint Exceptions : |
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50 | * software breakpoints. |
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51 | */ |
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52 | |
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53 | void |
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54 | BreakPointExcHdl(CPU_Exception_frame *ctx) |
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55 | { |
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56 | rtems_status_code status; |
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57 | rtems_id continueSemId; |
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58 | |
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59 | /* T. Straumann, 1/16/2002: we must re-enable the floating point engine |
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60 | * if the interrupted thread is FP. Otherwise, |
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61 | * the semaphore primitives may crash when they |
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62 | * try to save FP context while switching this |
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63 | * thread... |
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64 | */ |
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65 | if (ctx->EXC_SRR1 & 0x2000) { |
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66 | register unsigned long msr; |
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67 | __asm__ __volatile__("mfmsr %0":"=r"(msr)); |
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68 | __asm__ __volatile__("mtmsr %0"::"r"(msr|MSR_FP)); |
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69 | } |
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70 | |
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71 | if ( (justSaveContext) && (ctx->_EXC_number == ASM_SYS_VECTOR) ) { |
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72 | PushSavedExceptCtx (_Thread_Executing->Object.id, ctx); |
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73 | justSaveContext = 0; |
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74 | } |
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75 | else { |
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76 | if (ctx->_EXC_number != ASM_TRACE_VECTOR){ |
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77 | NbSerializedCtx++; |
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78 | rtems_semaphore_obtain(serializeSemId, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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79 | NbSerializedCtx--; |
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80 | } |
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81 | |
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82 | currentTargetThread = _Thread_Executing->Object.id; |
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83 | |
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84 | #ifdef DDEBUG |
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85 | printk("----------------------------------------------------------\n"); |
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86 | printk("Exception %d caught at PC %x by thread %d\n", |
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87 | ctx->_EXC_number, |
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88 | ctx->EXC_SRR0, |
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89 | _Thread_Executing->Object.id); |
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90 | printk("----------------------------------------------------------\n"); |
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91 | printk("Processor execution context at time of the fault was :\n"); |
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92 | printk("----------------------------------------------------------\n"); |
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93 | printk("\t R0 = %x\n", ctx->GPR0); |
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94 | printk("\t R1 = %x\n", ctx->GPR1); |
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95 | printk("\t R2 = %x\n", ctx->GPR2); |
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96 | printk("\t R3 = %x\n", ctx->GPR3); |
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97 | printk("\t R4 = %x\n", ctx->GPR4); |
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98 | printk("\t R5 = %x\n", ctx->GPR5); |
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99 | printk("\t R6 = %x\n", ctx->GPR6); |
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100 | printk("\t R7 = %x\n", ctx->GPR7); |
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101 | printk("\t R8 = %x\n", ctx->GPR8); |
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102 | printk("\t R9 = %x\n", ctx->GPR9); |
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103 | printk("\t R10 = %x\n", ctx->GPR10); |
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104 | printk("\t R11 = %x\n", ctx->GPR11); |
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105 | printk("\t R12 = %x\n", ctx->GPR12); |
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106 | printk("\t R13 = %x\n", ctx->GPR13); |
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107 | printk("\t R14 = %x\n", ctx->GPR14); |
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108 | printk("\t R15 = %x\n", ctx->GPR15); |
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109 | printk("\t R16 = %x\n", ctx->GPR16); |
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110 | printk("\t R17 = %x\n", ctx->GPR17); |
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111 | printk("\t R18 = %x\n", ctx->GPR18); |
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112 | printk("\t R19 = %x\n", ctx->GPR19); |
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113 | printk("\t R20 = %x\n", ctx->GPR20); |
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114 | printk("\t R21 = %x\n", ctx->GPR21); |
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115 | printk("\t R22 = %x\n", ctx->GPR22); |
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116 | printk("\t R23 = %x\n", ctx->GPR23); |
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117 | printk("\t R24 = %x\n", ctx->GPR24); |
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118 | printk("\t R25 = %x\n", ctx->GPR25); |
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119 | printk("\t R26 = %x\n", ctx->GPR26); |
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120 | printk("\t R27 = %x\n", ctx->GPR27); |
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121 | printk("\t R28 = %x\n", ctx->GPR28); |
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122 | printk("\t R29 = %x\n", ctx->GPR29); |
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123 | printk("\t R30 = %x\n", ctx->GPR30); |
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124 | printk("\t R31 = %x\n", ctx->GPR31); |
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125 | printk("\t CR = %x\n", ctx->EXC_CR); |
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126 | printk("\t CTR = %x\n", ctx->EXC_CTR); |
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127 | printk("\t XER = %x\n", ctx->EXC_XER); |
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128 | printk("\t LR = %x\n", ctx->EXC_LR); |
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129 | printk("\t MSR = %x\n", ctx->EXC_SRR1); |
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130 | #endif |
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131 | |
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132 | status = rtems_semaphore_create (rtems_build_name('D', 'B', 'G', 'c'), |
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133 | 0, |
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134 | RTEMS_FIFO | |
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135 | RTEMS_COUNTING_SEMAPHORE | |
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136 | RTEMS_NO_INHERIT_PRIORITY | |
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137 | RTEMS_NO_PRIORITY_CEILING | |
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138 | RTEMS_LOCAL, |
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139 | 0, |
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140 | &continueSemId); |
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141 | if (status != RTEMS_SUCCESSFUL) |
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142 | rtems_panic ("Can't create continue semaphore: `%s'\n",rtems_status_text(status)); |
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143 | |
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144 | PushExceptCtx (_Thread_Executing->Object.id, continueSemId, ctx); |
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145 | |
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146 | switch (ctx->_EXC_number){ |
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147 | case ASM_TRACE_VECTOR : |
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148 | DPRINTF((" TRACE EXCEPTION !!!\n")); |
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149 | ctx->EXC_SRR1 &= ~MSR_SE; |
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150 | ExitForSingleStep-- ; |
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151 | rtems_semaphore_release( wakeupEventSemId ); |
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152 | break; |
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153 | |
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154 | case ASM_PROG_VECTOR : |
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155 | DPRINTF((" BREAKPOINT EXCEPTION !!!\n")); |
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156 | rtems_semaphore_release( wakeupEventSemId ); |
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157 | break; |
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158 | |
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159 | case ASM_SYS_VECTOR : |
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160 | DPRINTF((" ENTER RDBG !!!\n")); |
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161 | rtems_semaphore_release( wakeupEventSemId ); |
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162 | break; |
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163 | |
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164 | default: |
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165 | DPRINTF((" OTHER EXCEPTION !!!\n")); |
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166 | #ifdef DDEBUG |
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167 | { extern void BSP_printStackTrace(); |
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168 | BSP_printStackTrace(ctx); |
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169 | } |
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170 | #endif |
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171 | rtems_semaphore_release( wakeupEventSemId ); |
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172 | break; |
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173 | } |
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174 | |
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175 | rtems_semaphore_obtain(continueSemId, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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176 | |
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177 | PopExceptCtx (_Thread_Executing->Object.id); |
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178 | rtems_semaphore_delete(continueSemId); |
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179 | } |
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180 | |
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181 | } |
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182 | |
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183 | |
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184 | |
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