Mercurial > repos > blastem
annotate gdb_remote.c @ 801:092524bb2e8f
Fix GDB remote debugging support
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 26 Jul 2015 16:32:34 -0700 |
parents | 724bbec47f86 |
children | 236a184bf6f0 |
rev | line source |
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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6 #include "gdb_remote.h" |
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7 #include "68kinst.h" |
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8 #include "debug.h" |
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9 #include "util.h" |
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10 #include <unistd.h> |
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11 #include <fcntl.h> |
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12 #include <stddef.h> |
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13 #include <stdlib.h> |
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14 #include <stdio.h> |
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15 #include <string.h> |
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16 |
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17 #define INITIAL_BUFFER_SIZE (16*1024) |
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18 |
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19 #ifdef DO_DEBUG_PRINT |
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20 #define dfprintf fprintf |
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21 #else |
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22 #define dfprintf |
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23 #endif |
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24 |
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25 char * buf = NULL; |
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26 char * curbuf = NULL; |
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27 char * end = NULL; |
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28 size_t bufsize; |
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29 int cont = 0; |
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30 int expect_break_response=0; |
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31 uint32_t resume_pc; |
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32 |
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33 |
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34 static uint16_t branch_t; |
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35 static uint16_t branch_f; |
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36 |
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37 static bp_def * breakpoints = NULL; |
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38 static uint32_t bp_index = 0; |
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39 |
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40 |
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41 void hex_32(uint32_t num, char * out) |
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42 { |
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43 for (int32_t shift = 28; shift >= 0; shift -= 4) |
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44 { |
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45 uint8_t nibble = num >> shift & 0xF; |
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46 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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47 } |
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48 } |
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49 |
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50 void hex_16(uint16_t num, char * out) |
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51 { |
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52 for (int16_t shift = 14; shift >= 0; shift -= 4) |
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53 { |
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54 uint8_t nibble = num >> shift & 0xF; |
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55 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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56 } |
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57 } |
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58 |
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59 void hex_8(uint8_t num, char * out) |
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60 { |
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61 uint8_t nibble = num >> 4; |
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62 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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63 nibble = num & 0xF; |
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64 *out = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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65 } |
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66 |
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67 void gdb_calc_checksum(char * command, char *out) |
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68 { |
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69 uint8_t checksum = 0; |
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70 while (*command) |
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71 { |
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72 checksum += *(command++); |
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73 } |
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74 hex_8(checksum, out); |
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75 } |
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76 |
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77 void write_or_die(int fd, const void *buf, size_t count) |
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78 { |
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79 if (write(fd, buf, count) < count) { |
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80 fatal_error("Error writing to stdout\n"); |
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81 } |
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82 } |
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83 |
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84 void gdb_send_command(char * command) |
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85 { |
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86 char end[3]; |
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87 write_or_die(STDOUT_FILENO, "$", 1); |
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88 write_or_die(STDOUT_FILENO, command, strlen(command)); |
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89 end[0] = '#'; |
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90 gdb_calc_checksum(command, end+1); |
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91 write_or_die(STDOUT_FILENO, end, 3); |
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92 dfprintf(stderr, "Sent $%s#%c%c\n", command, end[1], end[2]); |
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93 } |
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94 |
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95 uint32_t calc_status(m68k_context * context) |
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96 { |
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97 uint32_t status = context->status << 3; |
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98 for (int i = 0; i < 5; i++) |
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99 { |
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100 status <<= 1; |
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101 status |= context->flags[i]; |
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102 } |
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103 return status; |
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104 } |
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105 |
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106 void update_status(m68k_context * context, uint16_t value) |
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107 { |
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108 context->status = value >> 8; |
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109 for (int i = 4; i >= 0; i--) |
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110 { |
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111 context->flags[i] = value & 1; |
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112 value >>= 1; |
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113 } |
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114 } |
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115 |
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116 uint8_t read_byte(m68k_context * context, uint32_t address) |
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117 { |
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118 |
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119 genesis_context *gen = context->system; |
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120 //TODO: Use generated read/write functions to support access to hardware that is not ROM or RAM |
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121 uint16_t * word = get_native_pointer(address & 0xFFFFFFFE, (void **)context->mem_pointers, &context->options->gen); |
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122 if (word) { |
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123 if (address & 1) { |
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124 return *word; |
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125 } |
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126 return *word >> 8; |
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127 } |
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128 if (address >= 0xA00000 && address < 0xA04000) { |
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129 return gen->zram[address & 0x1FFF]; |
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130 } |
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131 return 0; |
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132 } |
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133 |
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134 void write_byte(m68k_context * context, uint32_t address, uint8_t value) |
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135 { |
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136 genesis_context *gen = context->system; |
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137 //TODO: Use generated read/write functions so that memory map is properly respected |
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138 uint16_t * word = get_native_pointer(address & 0xFFFFFFFE, (void **)context->mem_pointers, &context->options->gen); |
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139 if (word) { |
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140 if (address & 1) { |
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141 *word = (*word & 0xFF00) | value; |
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142 } else { |
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143 *word = (*word & 0xFF) | value << 8; |
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144 } |
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145 //TODO: Deal with this more generally once m68k_handle_code_write can handle it |
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146 if (address >= 0xE00000) { |
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147 m68k_handle_code_write(address, context); |
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148 } |
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149 return; |
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150 } |
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151 if (address >= 0xA00000 && address < 0xA04000) { |
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152 z80_ram[address & 0x1FFF] = value; |
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153 genesis_context * gen = context->system; |
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154 #ifndef NO_Z80 |
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155 z80_handle_code_write(address & 0x1FFF, gen->z80); |
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156 #endif |
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157 return; |
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158 } else { |
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159 return; |
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160 } |
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161 } |
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162 |
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163 void gdb_run_command(m68k_context * context, uint32_t pc, char * command) |
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164 { |
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165 char send_buf[512]; |
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166 dfprintf(stderr, "Received command %s\n", command); |
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167 switch(*command) |
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168 { |
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169 |
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170 case 'c': |
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171 if (*(command+1) != 0) { |
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172 //TODO: implement resuming at an arbitrary address |
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173 goto not_impl; |
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174 } |
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175 cont = 1; |
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176 expect_break_response = 1; |
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177 break; |
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178 case 's': { |
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179 if (*(command+1) != 0) { |
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180 //TODO: implement resuming at an arbitrary address |
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181 goto not_impl; |
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182 } |
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183 m68kinst inst; |
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184 genesis_context *gen = context->system; |
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185 uint16_t * pc_ptr = get_native_pointer(pc, (void **)context->mem_pointers, &context->options->gen); |
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186 if (!pc_ptr) { |
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187 fatal_error("Entered gdb remote debugger stub at address %X\n", pc); |
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188 } |
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189 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF); |
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190 uint32_t after = pc + (after_pc-pc_ptr)*2; |
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191 |
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192 if (inst.op == M68K_RTS) { |
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193 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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194 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) { |
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195 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1); |
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196 } else if(m68k_is_branch(&inst)) { |
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197 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) { |
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198 branch_f = after; |
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199 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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200 insert_breakpoint(context, branch_t, (uint8_t *)gdb_debug_enter); |
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201 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) { |
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202 branch_t = after; |
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203 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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204 insert_breakpoint(context, branch_f, (uint8_t *)gdb_debug_enter); |
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205 } else { |
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206 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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207 } |
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208 } |
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209 insert_breakpoint(context, after, (uint8_t *)gdb_debug_enter); |
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210 |
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211 cont = 1; |
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212 expect_break_response = 1; |
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213 break; |
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214 } |
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215 case 'H': |
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216 if (command[1] == 'g' || command[1] == 'c') {; |
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217 //no thread suport, just acknowledge |
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218 gdb_send_command("OK"); |
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219 } else { |
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220 goto not_impl; |
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221 } |
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222 break; |
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223 case 'Z': { |
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224 uint8_t type = command[1]; |
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225 if (type < '2') { |
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226 uint32_t address = strtoul(command+3, NULL, 16); |
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227 insert_breakpoint(context, address, (uint8_t *)gdb_debug_enter); |
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228 bp_def *new_bp = malloc(sizeof(bp_def)); |
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229 new_bp->next = breakpoints; |
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230 new_bp->address = address; |
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231 new_bp->index = bp_index++; |
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232 breakpoints = new_bp; |
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233 gdb_send_command("OK"); |
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234 } else { |
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235 //watchpoints are not currently supported |
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236 gdb_send_command(""); |
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237 } |
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238 break; |
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239 } |
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240 case 'z': { |
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241 uint8_t type = command[1]; |
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242 if (type < '2') { |
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243 uint32_t address = strtoul(command+3, NULL, 16); |
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244 remove_breakpoint(context, address); |
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245 bp_def **found = find_breakpoint(&breakpoints, address); |
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246 if (*found) |
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247 { |
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248 bp_def * to_remove = *found; |
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249 *found = to_remove->next; |
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250 free(to_remove); |
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251 } |
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252 gdb_send_command("OK"); |
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253 } else { |
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254 //watchpoints are not currently supported |
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255 gdb_send_command(""); |
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256 } |
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257 break; |
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258 } |
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259 case 'g': { |
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260 char * cur = send_buf; |
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261 for (int i = 0; i < 8; i++) |
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262 { |
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263 hex_32(context->dregs[i], cur); |
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264 cur += 8; |
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265 } |
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266 for (int i = 0; i < 8; i++) |
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267 { |
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268 hex_32(context->aregs[i], cur); |
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269 cur += 8; |
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270 } |
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271 hex_32(calc_status(context), cur); |
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272 cur += 8; |
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273 hex_32(pc, cur); |
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274 cur += 8; |
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275 *cur = 0; |
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276 gdb_send_command(send_buf); |
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277 break; |
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278 } |
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279 case 'm': { |
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280 char * rest; |
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281 uint32_t address = strtoul(command+1, &rest, 16); |
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282 uint32_t size = strtoul(rest+1, NULL, 16); |
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283 if (size > (sizeof(send_buf)-1)/2) { |
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284 size = (sizeof(send_buf)-1)/2; |
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285 } |
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286 char *cur = send_buf; |
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287 while (size) |
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288 { |
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289 hex_8(read_byte(context, address), cur); |
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290 cur += 2; |
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291 address++; |
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292 size--; |
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293 } |
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294 *cur = 0; |
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295 gdb_send_command(send_buf); |
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296 break; |
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297 } |
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298 case 'M': { |
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299 char * rest; |
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300 uint32_t address = strtoul(command+1, &rest, 16); |
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301 uint32_t size = strtoul(rest+1, &rest, 16); |
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302 |
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303 char *cur = rest+1; |
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304 while (size) |
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305 { |
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306 char tmp[3]; |
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307 tmp[0] = *(cur++); |
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308 tmp[1] = *(cur++); |
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309 tmp[2] = 0; |
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310 write_byte(context, address, strtoul(tmp, NULL, 16)); |
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311 address++; |
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312 size--; |
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313 } |
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314 gdb_send_command("OK"); |
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315 break; |
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316 } |
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317 case 'X': |
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318 //binary transfers aren't supported currently as I don't feel like dealing with the escaping |
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319 gdb_send_command(""); |
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320 break; |
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321 case 'p': { |
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322 unsigned long reg = strtoul(command+1, NULL, 16); |
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323 |
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324 if (reg < 8) { |
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325 hex_32(context->dregs[reg], send_buf); |
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326 } else if (reg < 16) { |
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327 hex_32(context->aregs[reg-8], send_buf); |
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328 } else if (reg == 16) { |
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329 hex_32(calc_status(context), send_buf); |
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330 } else if (reg == 17) { |
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331 hex_32(pc, send_buf); |
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332 } else { |
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333 send_buf[0] = 0; |
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334 } |
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335 send_buf[8] = 0; |
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336 gdb_send_command(send_buf); |
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337 break; |
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338 } |
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339 case 'P': { |
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340 char *after = NULL; |
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341 unsigned long reg = strtoul(command+1, &after, 16); |
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342 uint32_t value = strtoul(after+1, NULL, 16); |
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343 |
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344 if (reg < 8) { |
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345 context->dregs[reg] = value; |
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346 } else if (reg < 16) { |
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347 context->aregs[reg-8] = value; |
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348 } else if (reg == 16) { |
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349 update_status(context, value); |
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350 } else { |
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351 //supporting updates to PC is going to be a pain |
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352 gdb_send_command("E01"); |
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353 break; |
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354 } |
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355 gdb_send_command("OK"); |
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356 break; |
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357 } |
515
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358 case 'q': |
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359 if (!memcmp("Supported", command+1, strlen("Supported"))) { |
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360 sprintf(send_buf, "PacketSize=%X", (int)bufsize); |
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361 gdb_send_command(send_buf); |
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362 } else if (!memcmp("Attached", command+1, strlen("Supported"))) { |
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363 //not really meaningful for us, but saying we spawned a new process |
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364 //is probably closest to the truth |
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365 gdb_send_command("0"); |
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366 } else if (!memcmp("Offsets", command+1, strlen("Offsets"))) { |
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367 //no relocations, so offsets are all 0 |
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368 gdb_send_command("Text=0;Data=0;Bss=0"); |
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369 } else if (!memcmp("Symbol", command+1, strlen("Symbol"))) { |
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370 gdb_send_command(""); |
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371 } else if (!memcmp("TStatus", command+1, strlen("TStatus"))) { |
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372 //TODO: actual tracepoint support |
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373 gdb_send_command("T0;tnotrun:0"); |
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374 } else if (!memcmp("TfV", command+1, strlen("TfV")) || !memcmp("TfP", command+1, strlen("TfP"))) { |
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375 //TODO: actual tracepoint support |
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376 gdb_send_command(""); |
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377 } else if (command[1] == 'C') { |
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378 //we only support a single thread currently, so send 1 |
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379 gdb_send_command("1"); |
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380 } else { |
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381 goto not_impl; |
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382 } |
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383 break; |
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384 case 'v': |
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385 if (!memcmp("Cont?", command+1, strlen("Cont?"))) { |
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386 gdb_send_command("vCont;c;C;s;S"); |
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387 } else if (!memcmp("Cont;", command+1, strlen("Cont;"))) { |
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388 switch (*(command + 1 + strlen("Cont;"))) |
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389 { |
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390 case 'c': |
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391 case 'C': |
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392 //might be interesting to have continue with signal fire a |
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393 //trap exception or something, but for no we'll treat it as |
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394 //a normal continue |
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395 cont = 1; |
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396 expect_break_response = 1; |
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397 break; |
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398 case 's': |
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399 case 'S': { |
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400 m68kinst inst; |
801
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401 genesis_context *gen = context->system; |
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402 uint16_t * pc_ptr = get_native_pointer(pc, (void **)context->mem_pointers, &context->options->gen); |
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403 if (!pc_ptr) { |
792
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404 fatal_error("Entered gdb remote debugger stub at address %X\n", pc); |
525
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405 } |
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406 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF); |
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407 uint32_t after = pc + (after_pc-pc_ptr)*2; |
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408 |
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409 if (inst.op == M68K_RTS) { |
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410 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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411 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) { |
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412 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1); |
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413 } else if(m68k_is_branch(&inst)) { |
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414 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) { |
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415 branch_f = after; |
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416 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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417 insert_breakpoint(context, branch_t, (uint8_t *)gdb_debug_enter); |
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418 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) { |
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419 branch_t = after; |
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420 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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421 insert_breakpoint(context, branch_f, (uint8_t *)gdb_debug_enter); |
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422 } else { |
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423 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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424 } |
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425 } |
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426 insert_breakpoint(context, after, (uint8_t *)gdb_debug_enter); |
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427 |
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428 cont = 1; |
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429 expect_break_response = 1; |
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430 break; |
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431 } |
515
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432 default: |
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433 goto not_impl; |
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434 } |
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435 } else { |
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436 goto not_impl; |
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437 } |
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438 break; |
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439 case '?': |
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440 gdb_send_command("S05"); |
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441 break; |
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442 default: |
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443 goto not_impl; |
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444 |
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445 } |
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446 return; |
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447 not_impl: |
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448 fatal_error("Command %s is not implemented, exiting...\n", command); |
515
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449 } |
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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450 |
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451 m68k_context * gdb_debug_enter(m68k_context * context, uint32_t pc) |
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452 { |
525
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453 dfprintf(stderr, "Entered debugger at address %X\n", pc); |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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454 if (expect_break_response) { |
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455 gdb_send_command("S05"); |
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456 expect_break_response = 0; |
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457 } |
525
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458 if ((pc & 0xFFFFFF) == branch_t) { |
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459 bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f); |
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460 if (!*f_bp) { |
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461 remove_breakpoint(context, branch_f); |
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462 } |
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463 branch_t = branch_f = 0; |
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464 } else if((pc & 0xFFFFFF) == branch_f) { |
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465 bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t); |
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466 if (!*t_bp) { |
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467 remove_breakpoint(context, branch_t); |
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468 } |
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469 branch_t = branch_f = 0; |
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470 } |
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471 //Check if this is a user set breakpoint, or just a temporary one |
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472 bp_def ** this_bp = find_breakpoint(&breakpoints, pc & 0xFFFFFF); |
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473 if (!*this_bp) { |
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474 remove_breakpoint(context, pc & 0xFFFFFF); |
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475 } |
456
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476 resume_pc = pc; |
505
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477 cont = 0; |
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478 uint8_t partial = 0; |
456
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479 while(!cont) |
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480 { |
505
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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481 if (!curbuf) { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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482 int numread = read(STDIN_FILENO, buf, bufsize); |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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483 curbuf = buf; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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484 end = buf + numread; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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485 } else if (partial) { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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486 if (curbuf != buf) { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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487 memmove(curbuf, buf, end-curbuf); |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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488 end -= curbuf - buf; |
505
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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489 } |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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490 int numread = read(STDIN_FILENO, end, bufsize - (end-buf)); |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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491 end += numread; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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492 curbuf = buf; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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493 } |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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494 for (; curbuf < end; curbuf++) |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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495 { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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496 if (*curbuf == '$') |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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497 { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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498 curbuf++; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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499 char * start = curbuf; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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500 while (curbuf < end && *curbuf != '#') { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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501 curbuf++; |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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parents:
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502 } |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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503 if (*curbuf == '#') { |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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504 //check to make sure we've received the checksum bytes |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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505 if (end-curbuf >= 2) { |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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506 //TODO: verify checksum |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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507 //Null terminate payload |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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508 *curbuf = 0; |
505
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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509 //send acknowledgement |
515
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510 if (write(STDOUT_FILENO, "+", 1) < 1) { |
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Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
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511 fatal_error("Error writing to stdout\n"); |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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512 } |
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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513 gdb_run_command(context, pc, start); |
505
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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514 curbuf += 2; |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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515 } |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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516 } else { |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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517 curbuf--; |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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518 partial = 1; |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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519 break; |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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parents:
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520 } |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents:
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521 } else { |
525
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522 dfprintf(stderr, "Ignoring character %c\n", *curbuf); |
505
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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parents:
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523 } |
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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parents:
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524 } |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents:
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525 if (curbuf == end) { |
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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526 curbuf = NULL; |
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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527 } |
456
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Initial work on GDB remote debugging support
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parents:
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528 } |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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529 return context; |
456
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530 } |
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parents:
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531 |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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532 void gdb_remote_init(void) |
456
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533 { |
515
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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534 buf = malloc(INITIAL_BUFFER_SIZE); |
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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535 curbuf = NULL; |
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Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents:
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536 bufsize = INITIAL_BUFFER_SIZE; |
456
249d24973682
Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff
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537 } |