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annotate packages/cygmon/current/misc/bsp/arm/gdb-cpu.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 435cced73e2f
children d2c90368aeef
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435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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1 //==========================================================================
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2 //
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3 // gdb-cpu.c
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4 //
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5 // CPU specific support for GDB stub.
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6 //
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7 //==========================================================================
208
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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 Red Hat, 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 version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
76
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s):
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44 // Contributors: gthomas
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45 // Date: 1999-10-20
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46 // Purpose: CPU specific support for GDB stub.
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47 // Description: ARM is a Registered Trademark of Advanced RISC Machines
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48 // Limited.
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49 // Other Brands and Trademarks are the property of their
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50 // respective owners.
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //=========================================================================
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55
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56 #include <bsp/cpu.h>
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57 #include <bsp/bsp.h>
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58 #include "insn.h"
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59 #include "gdb.h"
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60
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61 /*
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62 * Return byte offset within the saved register area of the
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63 * given register.
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64 */
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65 int
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66 bsp_regbyte(int regno)
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67 {
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68 switch(regno)
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69 {
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70 case REG_R0: return (int)&(((ex_regs_t*)0)->_r0); break;
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71 case REG_R1: return (int)&(((ex_regs_t*)0)->_r1); break;
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72 case REG_R2: return (int)&(((ex_regs_t*)0)->_r2); break;
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73 case REG_R3: return (int)&(((ex_regs_t*)0)->_r3); break;
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74 case REG_R4: return (int)&(((ex_regs_t*)0)->_r4); break;
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75 case REG_R5: return (int)&(((ex_regs_t*)0)->_r5); break;
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76 case REG_R6: return (int)&(((ex_regs_t*)0)->_r6); break;
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77 case REG_R7: return (int)&(((ex_regs_t*)0)->_r7); break;
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78 case REG_R8: return (int)&(((ex_regs_t*)0)->_r8); break;
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79 case REG_R9: return (int)&(((ex_regs_t*)0)->_r9); break;
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80 case REG_R10: return (int)&(((ex_regs_t*)0)->_r10); break;
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81 case REG_R11: return (int)&(((ex_regs_t*)0)->_r11); break;
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82 case REG_R12: return (int)&(((ex_regs_t*)0)->_r12); break;
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83 case REG_SP: return (int)&(((ex_regs_t*)0)->_sp); break;
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84 case REG_LR: return (int)&(((ex_regs_t*)0)->_lr); break;
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85 case REG_PC: return (int)&(((ex_regs_t*)0)->_pc); break;
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86
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87 #ifndef __ECOS__
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88 case REG_F0: return (int)&(((ex_regs_t*)0)->_f0); break;
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89 case REG_F1: return (int)&(((ex_regs_t*)0)->_f1); break;
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90 case REG_F2: return (int)&(((ex_regs_t*)0)->_f2); break;
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91 case REG_F3: return (int)&(((ex_regs_t*)0)->_f3); break;
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92 case REG_F4: return (int)&(((ex_regs_t*)0)->_f4); break;
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93 case REG_F5: return (int)&(((ex_regs_t*)0)->_f5); break;
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94 case REG_F6: return (int)&(((ex_regs_t*)0)->_f6); break;
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95 case REG_F7: return (int)&(((ex_regs_t*)0)->_f7); break;
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96 case REG_FPS: return (int)&(((ex_regs_t*)0)->_fps); break;
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97 #endif
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98
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99 case REG_CPSR: return (int)&(((ex_regs_t*)0)->_cpsr); break;
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100 case REG_SPSVC: return (int)&(((ex_regs_t*)0)->_spsvc); break;
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101 }
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102
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103 return 0;
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104 }
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105
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106
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107 /*
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108 * Return size in bytes of given register.
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109 */
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110 int
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111 bsp_regsize(int regno)
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112 {
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113 switch(regno)
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114 {
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115 case REG_R0: return (sizeof (((ex_regs_t*)0)->_r0)); break;
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116 case REG_R1: return (sizeof (((ex_regs_t*)0)->_r1)); break;
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117 case REG_R2: return (sizeof (((ex_regs_t*)0)->_r2)); break;
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118 case REG_R3: return (sizeof (((ex_regs_t*)0)->_r3)); break;
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119 case REG_R4: return (sizeof (((ex_regs_t*)0)->_r4)); break;
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120 case REG_R5: return (sizeof (((ex_regs_t*)0)->_r5)); break;
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121 case REG_R6: return (sizeof (((ex_regs_t*)0)->_r6)); break;
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122 case REG_R7: return (sizeof (((ex_regs_t*)0)->_r7)); break;
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123 case REG_R8: return (sizeof (((ex_regs_t*)0)->_r8)); break;
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124 case REG_R9: return (sizeof (((ex_regs_t*)0)->_r9)); break;
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125 case REG_R10: return (sizeof (((ex_regs_t*)0)->_r10)); break;
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126 case REG_R11: return (sizeof (((ex_regs_t*)0)->_r11)); break;
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127 case REG_R12: return (sizeof (((ex_regs_t*)0)->_r12)); break;
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128 case REG_SP: return (sizeof (((ex_regs_t*)0)->_sp)); break;
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129 case REG_LR: return (sizeof (((ex_regs_t*)0)->_lr)); break;
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130 case REG_PC: return (sizeof (((ex_regs_t*)0)->_pc)); break;
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131
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132 #ifndef __ECOS__
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133 case REG_F0: return (sizeof (((ex_regs_t*)0)->_f0)); break;
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134 case REG_F1: return (sizeof (((ex_regs_t*)0)->_f1)); break;
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135 case REG_F2: return (sizeof (((ex_regs_t*)0)->_f2)); break;
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136 case REG_F3: return (sizeof (((ex_regs_t*)0)->_f3)); break;
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137 case REG_F4: return (sizeof (((ex_regs_t*)0)->_f4)); break;
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138 case REG_F5: return (sizeof (((ex_regs_t*)0)->_f5)); break;
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139 case REG_F6: return (sizeof (((ex_regs_t*)0)->_f6)); break;
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140 case REG_F7: return (sizeof (((ex_regs_t*)0)->_f7)); break;
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141 case REG_FPS: return (sizeof (((ex_regs_t*)0)->_fps)); break;
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142 #endif
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143
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144 case REG_CPSR: return (sizeof (((ex_regs_t*)0)->_cpsr)); break;
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145 case REG_SPSVC: return (sizeof (((ex_regs_t*)0)->_spsvc)); break;
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146 }
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147
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148 return 0;
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149 }
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150
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151
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152 /*
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153 * Given an exception number and a pointer to saved registers,
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154 * return a GDB signal value.
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155 */
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156 int
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157 bsp_get_signal(int exc_nr, void *saved_regs)
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158 {
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159 int sig = TARGET_SIGNAL_TRAP;
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160 ex_regs_t *regs = (ex_regs_t *)saved_regs;
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161
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162 switch (exc_nr) {
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163 case BSP_CORE_EXC_UNDEFINED_INSTRUCTION:
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164 {
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165 union arm_insn inst;
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166 if (bsp_memory_read((void *)regs->_pc, 0, ARM_INST_SIZE * 8, 1, &(inst.word)) != 0)
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167 {
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168 /*
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169 * We were able to read this address. It must be a valid address.
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170 */
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171 if (inst.word == BREAKPOINT_INSN)
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172 sig = TARGET_SIGNAL_TRAP;
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173 }
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174 else
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175 sig = TARGET_SIGNAL_ILL;
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176 }
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177 break;
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178 case BSP_CORE_EXC_SOFTWARE_INTERRUPT: sig = TARGET_SIGNAL_TRAP; break;
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179 case BSP_CORE_EXC_PREFETCH_ABORT: sig = TARGET_SIGNAL_BUS; break;
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180 case BSP_CORE_EXC_DATA_ABORT: sig = TARGET_SIGNAL_BUS; break;
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181 case BSP_CORE_EXC_ADDRESS_ERROR_26_BIT: sig = TARGET_SIGNAL_BUS; break;
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182 case BSP_CORE_EXC_IRQ: sig = TARGET_SIGNAL_INT; break;
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183 case BSP_CORE_EXC_FIQ: sig = TARGET_SIGNAL_INT; break;
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184 default: sig = TARGET_SIGNAL_TRAP; break;
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185 }
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186
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187 return sig;
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188 }
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189
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190
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191 /*
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192 * Set the PC value in the saved registers.
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193 */
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194 void
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195 bsp_set_pc(unsigned long pc, void *saved_regs)
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196 {
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197 ((ex_regs_t *)saved_regs)->_pc = pc;
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198 }
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199
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200
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201 /*
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202 * Get the PC value from the saved registers.
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203 */
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204 unsigned long
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205 bsp_get_pc(void *saved_regs)
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206 {
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207 return ((ex_regs_t *)saved_regs)->_pc;
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208 }