Mercurial > repos > blastem
annotate gdb_remote.c @ 1645:84ef1eb2c96a
Added code for actually saving new controller bindings to an appropriate key in the config file
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 30 Nov 2018 00:35:05 -0800 |
parents | 85a90964b557 |
children | ded16f3d7eb4 d6d4c006a7b3 |
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 #ifdef _WIN32 |
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7 #define WINVER 0x501 |
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8 #include <winsock2.h> |
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9 #include <ws2tcpip.h> |
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10 |
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11 int gdb_sock; |
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12 #define GDB_IN_FD gdb_sock |
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13 #define GDB_OUT_FD gdb_sock |
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14 #define GDB_READ(fd, buf, bufsize) recv(fd, buf, bufsize, 0) |
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15 #define GDB_WRITE(fd, buf, bufsize) send(fd, buf, bufsize, 0) |
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16 #else |
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17 #define GDB_IN_FD STDIN_FILENO |
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18 #define GDB_OUT_FD STDOUT_FILENO |
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19 #define GDB_READ read |
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20 #define GDB_WRITE write |
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21 #endif |
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22 |
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23 #include "gdb_remote.h" |
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24 #include "68kinst.h" |
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25 #include "debug.h" |
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26 #include "util.h" |
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27 #include <unistd.h> |
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28 #include <fcntl.h> |
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29 #include <stddef.h> |
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30 #include <stdlib.h> |
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31 #include <stdio.h> |
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32 #include <string.h> |
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33 |
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34 |
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35 |
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36 #define INITIAL_BUFFER_SIZE (16*1024) |
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37 |
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38 #ifdef DO_DEBUG_PRINT |
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39 #define dfprintf fprintf |
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40 #else |
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41 #define dfprintf |
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42 #endif |
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43 |
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44 char * buf = NULL; |
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45 char * curbuf = NULL; |
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46 char * end = NULL; |
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47 size_t bufsize; |
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48 int cont = 0; |
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49 int expect_break_response=0; |
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50 uint32_t resume_pc; |
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51 |
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52 |
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53 static uint16_t branch_t; |
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54 static uint16_t branch_f; |
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55 |
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56 static bp_def * breakpoints = NULL; |
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57 static uint32_t bp_index = 0; |
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58 |
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59 |
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60 void hex_32(uint32_t num, char * out) |
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61 { |
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62 for (int32_t shift = 28; shift >= 0; shift -= 4) |
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63 { |
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64 uint8_t nibble = num >> shift & 0xF; |
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65 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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66 } |
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67 } |
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68 |
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69 void hex_16(uint16_t num, char * out) |
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70 { |
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71 for (int16_t shift = 14; shift >= 0; shift -= 4) |
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72 { |
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73 uint8_t nibble = num >> shift & 0xF; |
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74 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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75 } |
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76 } |
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77 |
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78 void hex_8(uint8_t num, char * out) |
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79 { |
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80 uint8_t nibble = num >> 4; |
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81 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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82 nibble = num & 0xF; |
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83 *out = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0'; |
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84 } |
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85 |
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86 void gdb_calc_checksum(char * command, char *out) |
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87 { |
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88 uint8_t checksum = 0; |
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89 while (*command) |
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90 { |
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91 checksum += *(command++); |
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92 } |
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93 hex_8(checksum, out); |
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94 } |
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95 |
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96 void write_or_die(int fd, const void *buf, size_t count) |
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97 { |
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98 if (GDB_WRITE(fd, buf, count) < count) { |
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99 fatal_error("Error writing to stdout\n"); |
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100 } |
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101 } |
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102 |
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103 void gdb_send_command(char * command) |
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104 { |
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105 char end[3]; |
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106 write_or_die(GDB_OUT_FD, "$", 1); |
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107 write_or_die(GDB_OUT_FD, command, strlen(command)); |
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108 end[0] = '#'; |
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109 gdb_calc_checksum(command, end+1); |
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110 write_or_die(GDB_OUT_FD, end, 3); |
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111 dfprintf(stderr, "Sent $%s#%c%c\n", command, end[1], end[2]); |
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112 } |
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113 |
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114 uint32_t calc_status(m68k_context * context) |
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115 { |
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116 uint32_t status = context->status << 3; |
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117 for (int i = 0; i < 5; i++) |
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118 { |
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119 status <<= 1; |
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120 status |= context->flags[i]; |
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121 } |
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122 return status; |
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123 } |
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124 |
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125 void update_status(m68k_context * context, uint16_t value) |
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126 { |
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127 context->status = value >> 8; |
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128 for (int i = 4; i >= 0; i--) |
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129 { |
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130 context->flags[i] = value & 1; |
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131 value >>= 1; |
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132 } |
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133 } |
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134 |
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135 uint8_t read_byte(m68k_context * context, uint32_t address) |
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136 { |
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137 |
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138 genesis_context *gen = context->system; |
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139 //TODO: Use generated read/write functions to support access to hardware that is not ROM or RAM |
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140 uint16_t * word = get_native_pointer(address & 0xFFFFFFFE, (void **)context->mem_pointers, &context->options->gen); |
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141 if (word) { |
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142 if (address & 1) { |
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143 return *word; |
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144 } |
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145 return *word >> 8; |
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146 } |
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147 if (address >= 0xA00000 && address < 0xA04000) { |
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148 return gen->zram[address & 0x1FFF]; |
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149 } |
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150 return 0; |
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151 } |
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152 |
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153 void write_byte(m68k_context * context, uint32_t address, uint8_t value) |
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154 { |
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155 genesis_context *gen = context->system; |
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156 //TODO: Use generated read/write functions so that memory map is properly respected |
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157 uint16_t * word = get_native_pointer(address & 0xFFFFFFFE, (void **)context->mem_pointers, &context->options->gen); |
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158 if (word) { |
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159 if (address & 1) { |
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160 *word = (*word & 0xFF00) | value; |
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161 } else { |
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162 *word = (*word & 0xFF) | value << 8; |
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163 } |
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164 //TODO: Deal with this more generally once m68k_handle_code_write can handle it |
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165 if (address >= 0xE00000) { |
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166 m68k_handle_code_write(address, context); |
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167 } |
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168 return; |
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169 } |
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170 if (address >= 0xA00000 && address < 0xA04000) { |
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171 gen->zram[address & 0x1FFF] = value; |
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172 genesis_context * gen = context->system; |
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173 #ifndef NO_Z80 |
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174 z80_handle_code_write(address & 0x1FFF, gen->z80); |
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175 #endif |
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176 return; |
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177 } else { |
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178 return; |
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179 } |
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180 } |
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181 |
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182 void gdb_run_command(m68k_context * context, uint32_t pc, char * command) |
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183 { |
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184 char send_buf[512]; |
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185 dfprintf(stderr, "Received command %s\n", command); |
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186 switch(*command) |
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187 { |
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188 |
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189 case 'c': |
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190 if (*(command+1) != 0) { |
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191 //TODO: implement resuming at an arbitrary address |
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192 goto not_impl; |
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193 } |
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194 cont = 1; |
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195 expect_break_response = 1; |
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196 break; |
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197 case 's': { |
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198 if (*(command+1) != 0) { |
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199 //TODO: implement resuming at an arbitrary address |
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200 goto not_impl; |
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201 } |
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202 m68kinst inst; |
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203 genesis_context *gen = context->system; |
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204 uint16_t * pc_ptr = get_native_pointer(pc, (void **)context->mem_pointers, &context->options->gen); |
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205 if (!pc_ptr) { |
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206 fatal_error("Entered gdb remote debugger stub at address %X\n", pc); |
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207 } |
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208 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF); |
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209 uint32_t after = pc + (after_pc-pc_ptr)*2; |
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210 |
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211 if (inst.op == M68K_RTS) { |
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212 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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213 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) { |
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214 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1); |
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215 } else if(m68k_is_branch(&inst)) { |
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216 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) { |
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217 branch_f = after; |
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218 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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219 insert_breakpoint(context, branch_t, gdb_debug_enter); |
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220 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) { |
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221 branch_t = after; |
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222 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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223 insert_breakpoint(context, branch_f, gdb_debug_enter); |
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224 } else { |
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225 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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226 } |
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227 } |
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228 insert_breakpoint(context, after, gdb_debug_enter); |
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229 |
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230 cont = 1; |
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231 expect_break_response = 1; |
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232 break; |
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233 } |
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234 case 'H': |
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235 if (command[1] == 'g' || command[1] == 'c') {; |
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236 //no thread suport, just acknowledge |
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237 gdb_send_command("OK"); |
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238 } else { |
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239 goto not_impl; |
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240 } |
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241 break; |
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242 case 'Z': { |
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243 uint8_t type = command[1]; |
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244 if (type < '2') { |
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245 uint32_t address = strtoul(command+3, NULL, 16); |
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246 insert_breakpoint(context, address, gdb_debug_enter); |
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247 bp_def *new_bp = malloc(sizeof(bp_def)); |
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248 new_bp->next = breakpoints; |
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249 new_bp->address = address; |
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250 new_bp->index = bp_index++; |
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251 breakpoints = new_bp; |
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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 'z': { |
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260 uint8_t type = command[1]; |
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261 if (type < '2') { |
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262 uint32_t address = strtoul(command+3, NULL, 16); |
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263 remove_breakpoint(context, address); |
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264 bp_def **found = find_breakpoint(&breakpoints, address); |
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265 if (*found) |
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266 { |
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267 bp_def * to_remove = *found; |
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268 *found = to_remove->next; |
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269 free(to_remove); |
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270 } |
515
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271 gdb_send_command("OK"); |
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272 } else { |
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273 //watchpoints are not currently supported |
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274 gdb_send_command(""); |
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275 } |
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276 break; |
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277 } |
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278 case 'g': { |
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279 char * cur = send_buf; |
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280 for (int i = 0; i < 8; i++) |
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281 { |
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282 hex_32(context->dregs[i], cur); |
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283 cur += 8; |
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284 } |
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285 for (int i = 0; i < 8; i++) |
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286 { |
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287 hex_32(context->aregs[i], cur); |
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288 cur += 8; |
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289 } |
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290 hex_32(calc_status(context), cur); |
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291 cur += 8; |
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292 hex_32(pc, cur); |
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293 cur += 8; |
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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, NULL, 16); |
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302 if (size > (sizeof(send_buf)-1)/2) { |
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303 size = (sizeof(send_buf)-1)/2; |
515
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304 } |
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305 char *cur = send_buf; |
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306 while (size) |
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307 { |
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308 hex_8(read_byte(context, address), cur); |
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309 cur += 2; |
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310 address++; |
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311 size--; |
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312 } |
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313 *cur = 0; |
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314 gdb_send_command(send_buf); |
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315 break; |
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316 } |
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317 case 'M': { |
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318 char * rest; |
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319 uint32_t address = strtoul(command+1, &rest, 16); |
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320 uint32_t size = strtoul(rest+1, &rest, 16); |
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321 |
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322 char *cur = rest+1; |
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323 while (size) |
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324 { |
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325 char tmp[3]; |
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326 tmp[0] = *(cur++); |
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327 tmp[1] = *(cur++); |
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328 tmp[2] = 0; |
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329 write_byte(context, address, strtoul(tmp, NULL, 16)); |
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330 address++; |
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331 size--; |
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332 } |
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333 gdb_send_command("OK"); |
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334 break; |
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335 } |
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336 case 'X': |
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337 //binary transfers aren't supported currently as I don't feel like dealing with the escaping |
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338 gdb_send_command(""); |
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339 break; |
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340 case 'p': { |
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341 unsigned long reg = strtoul(command+1, NULL, 16); |
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342 |
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343 if (reg < 8) { |
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344 hex_32(context->dregs[reg], send_buf); |
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345 } else if (reg < 16) { |
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346 hex_32(context->aregs[reg-8], send_buf); |
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347 } else if (reg == 16) { |
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348 hex_32(calc_status(context), send_buf); |
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349 } else if (reg == 17) { |
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350 hex_32(pc, send_buf); |
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351 } else { |
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352 send_buf[0] = 0; |
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353 } |
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354 send_buf[8] = 0; |
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355 gdb_send_command(send_buf); |
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356 break; |
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357 } |
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358 case 'P': { |
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359 char *after = NULL; |
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360 unsigned long reg = strtoul(command+1, &after, 16); |
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361 uint32_t value = strtoul(after+1, NULL, 16); |
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362 |
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363 if (reg < 8) { |
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364 context->dregs[reg] = value; |
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365 } else if (reg < 16) { |
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366 context->aregs[reg-8] = value; |
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367 } else if (reg == 16) { |
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368 update_status(context, value); |
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369 } else { |
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370 //supporting updates to PC is going to be a pain |
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371 gdb_send_command("E01"); |
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372 break; |
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373 } |
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374 gdb_send_command("OK"); |
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375 break; |
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376 } |
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377 case 'q': |
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378 if (!memcmp("Supported", command+1, strlen("Supported"))) { |
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379 sprintf(send_buf, "PacketSize=%X", (int)bufsize); |
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380 gdb_send_command(send_buf); |
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381 } else if (!memcmp("Attached", command+1, strlen("Attached"))) { |
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382 //not really meaningful for us, but saying we spawned a new process |
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383 //is probably closest to the truth |
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384 gdb_send_command("0"); |
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385 } else if (!memcmp("Offsets", command+1, strlen("Offsets"))) { |
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386 //no relocations, so offsets are all 0 |
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387 gdb_send_command("Text=0;Data=0;Bss=0"); |
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388 } else if (!memcmp("Symbol", command+1, strlen("Symbol"))) { |
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389 gdb_send_command(""); |
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390 } else if (!memcmp("TStatus", command+1, strlen("TStatus"))) { |
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391 //TODO: actual tracepoint support |
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392 gdb_send_command("T0;tnotrun:0"); |
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393 } else if (!memcmp("TfV", command+1, strlen("TfV")) || !memcmp("TfP", command+1, strlen("TfP"))) { |
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394 //TODO: actual tracepoint support |
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395 gdb_send_command(""); |
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396 } else if (command[1] == 'C') { |
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397 //we only support a single thread currently, so send 1 |
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398 gdb_send_command("QC1"); |
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399 } else if (!strcmp("fThreadInfo", command + 1)) { |
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400 //we only support a single thread currently, so send 1 |
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401 gdb_send_command("m1"); |
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402 } else if (!strcmp("sThreadInfo", command + 1)) { |
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403 gdb_send_command("l"); |
515
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404 } else { |
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405 goto not_impl; |
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406 } |
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407 break; |
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408 case 'v': |
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409 if (!memcmp("Cont?", command+1, strlen("Cont?"))) { |
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410 gdb_send_command("vCont;c;C;s;S"); |
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411 } else if (!strcmp("MustReplyEmpty", command + 1)) { |
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412 gdb_send_command(""); |
515
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413 } else if (!memcmp("Cont;", command+1, strlen("Cont;"))) { |
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414 switch (*(command + 1 + strlen("Cont;"))) |
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415 { |
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416 case 'c': |
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417 case 'C': |
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418 //might be interesting to have continue with signal fire a |
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419 //trap exception or something, but for no we'll treat it as |
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420 //a normal continue |
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421 cont = 1; |
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422 expect_break_response = 1; |
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423 break; |
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424 case 's': |
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425 case 'S': { |
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426 m68kinst inst; |
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427 genesis_context *gen = context->system; |
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428 uint16_t * pc_ptr = get_native_pointer(pc, (void **)context->mem_pointers, &context->options->gen); |
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429 if (!pc_ptr) { |
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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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430 fatal_error("Entered gdb remote debugger stub at address %X\n", pc); |
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431 } |
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432 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF); |
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433 uint32_t after = pc + (after_pc-pc_ptr)*2; |
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434 |
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435 if (inst.op == M68K_RTS) { |
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436 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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437 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) { |
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438 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1); |
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439 } else if(m68k_is_branch(&inst)) { |
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440 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) { |
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441 branch_f = after; |
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442 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
1111
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443 insert_breakpoint(context, branch_t, gdb_debug_enter); |
525
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444 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
445 branch_t = after; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
446 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
1111
2eb54e24914e
Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents:
1103
diff
changeset
|
447 insert_breakpoint(context, branch_f, gdb_debug_enter); |
525
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
448 } else { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
449 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
450 } |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
451 } |
1111
2eb54e24914e
Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents:
1103
diff
changeset
|
452 insert_breakpoint(context, after, gdb_debug_enter); |
525
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
453 |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
454 cont = 1; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
455 expect_break_response = 1; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
456 break; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
457 } |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
458 default: |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
459 goto not_impl; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
460 } |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
461 } else { |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
462 goto not_impl; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
463 } |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
464 break; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
465 case '?': |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
466 gdb_send_command("S05"); |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
467 break; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
468 default: |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
469 goto not_impl; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
470 |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
471 } |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
472 return; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
473 not_impl: |
792
724bbec47f86
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).
Michael Pavone <pavone@retrodev.com>
parents:
757
diff
changeset
|
474 fatal_error("Command %s is not implemented, exiting...\n", command); |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
475 } |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
476 |
1329
85a90964b557
Fix interaction between 68K debugger and instruction retranslation due to self modifying code or bank switching
Michael Pavone <pavone@retrodev.com>
parents:
1245
diff
changeset
|
477 void gdb_debug_enter(m68k_context * context, uint32_t pc) |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
478 { |
525
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Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
479 dfprintf(stderr, "Entered debugger at address %X\n", pc); |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
480 if (expect_break_response) { |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
481 gdb_send_command("S05"); |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
482 expect_break_response = 0; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
483 } |
525
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
484 if ((pc & 0xFFFFFF) == branch_t) { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
485 bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f); |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
486 if (!*f_bp) { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
487 remove_breakpoint(context, branch_f); |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
488 } |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
489 branch_t = branch_f = 0; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
490 } else if((pc & 0xFFFFFF) == branch_f) { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
491 bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t); |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
492 if (!*t_bp) { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
493 remove_breakpoint(context, branch_t); |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
494 } |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
495 branch_t = branch_f = 0; |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
496 } |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
497 //Check if this is a user set breakpoint, or just a temporary one |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
498 bp_def ** this_bp = find_breakpoint(&breakpoints, pc & 0xFFFFFF); |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
499 if (!*this_bp) { |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
500 remove_breakpoint(context, pc & 0xFFFFFF); |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
501 } |
456
249d24973682
Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
502 resume_pc = pc; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
503 cont = 0; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
504 uint8_t partial = 0; |
456
249d24973682
Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 while(!cont) |
249d24973682
Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 { |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
507 if (!curbuf) { |
802
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
565
diff
changeset
|
508 int numread = GDB_READ(GDB_IN_FD, buf, bufsize); |
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
565
diff
changeset
|
509 if (numread < 0) { |
804
59e664fa2da8
Fix a search/replace bug from the old Win32 GDB remote debugging work and replace some more print+exit combos with fatal_error
Michael Pavone <pavone@retrodev.com>
parents:
803
diff
changeset
|
510 fatal_error("Failed to read on GDB input file descriptor\n"); |
802
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
565
diff
changeset
|
511 } |
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
565
diff
changeset
|
512 dfprintf(stderr, "read %d bytes\n", numread); |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
513 curbuf = buf; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
514 end = buf + numread; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
515 } else if (partial) { |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
516 if (curbuf != buf) { |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
517 memmove(curbuf, buf, end-curbuf); |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
518 end -= curbuf - buf; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
519 } |
1245
42fb3ee1e92c
Fix direct usage of read rather than GDB_READ in gdb_remote.c
Michael Pavone <pavone@retrodev.com>
parents:
1189
diff
changeset
|
520 int numread = GDB_READ(GDB_IN_FD, end, bufsize - (end-buf)); |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
521 end += numread; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
522 curbuf = buf; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
524 for (; curbuf < end; 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
525 { |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
526 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
527 { |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
528 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
529 char * start = 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
530 while (curbuf < end && *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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
531 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
532 } |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
533 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
534 //check to make sure we've received the checksum bytes |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
535 if (end-curbuf >= 2) { |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
536 //TODO: verify checksum |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
537 //Null terminate payload |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
538 *curbuf = 0; |
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
539 //send acknowledgement |
802
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
565
diff
changeset
|
540 if (GDB_WRITE(GDB_OUT_FD, "+", 1) < 1) { |
792
724bbec47f86
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).
Michael Pavone <pavone@retrodev.com>
parents:
757
diff
changeset
|
541 fatal_error("Error writing to stdout\n"); |
515
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542 } |
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543 gdb_run_command(context, pc, start); |
505
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544 curbuf += 2; |
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545 } |
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546 } else { |
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547 curbuf--; |
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548 partial = 1; |
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549 break; |
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550 } |
515
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551 } else { |
525
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552 dfprintf(stderr, "Ignoring character %c\n", *curbuf); |
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553 } |
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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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554 } |
515
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555 if (curbuf == end) { |
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556 curbuf = NULL; |
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557 } |
456
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558 } |
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559 } |
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560 |
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561 #ifdef _WIN32 |
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562 void gdb_cleanup(void) |
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563 { |
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564 WSACleanup(); |
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565 } |
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566 WSADATA wsa_data; |
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567 #endif |
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568 |
515
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569 void gdb_remote_init(void) |
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570 { |
515
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571 buf = malloc(INITIAL_BUFFER_SIZE); |
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572 curbuf = NULL; |
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573 bufsize = INITIAL_BUFFER_SIZE; |
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574 #ifdef _WIN32 |
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575 WSAStartup(MAKEWORD(2,2), &wsa_data); |
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576 |
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577 struct addrinfo request, *result; |
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578 memset(&request, 0, sizeof(request)); |
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579 request.ai_family = AF_INET; |
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580 request.ai_socktype = SOCK_STREAM; |
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581 request.ai_flags = AI_PASSIVE; |
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582 getaddrinfo("localhost", "1234", &request, &result); |
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583 |
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584 int listen_sock = socket(result->ai_family, result->ai_socktype, result->ai_protocol); |
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585 if (listen_sock < 0) { |
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586 fatal_error("Failed to open GDB remote debugging socket"); |
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587 } |
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588 if (bind(listen_sock, result->ai_addr, result->ai_addrlen) < 0) { |
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589 fatal_error("Failed to bind GDB remote debugging socket"); |
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590 } |
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591 if (listen(listen_sock, 1) < 0) { |
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592 fatal_error("Failed to listen on GDB remote debugging socket"); |
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593 } |
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594 gdb_sock = accept(listen_sock, NULL, NULL); |
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595 if (gdb_sock < 0) { |
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596 fatal_error("accept returned an error while listening on GDB remote debugging socket"); |
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597 } |
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598 closesocket(listen_sock); |
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599 #endif |
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600 } |