Mercurial > repos > blastem
annotate gdb_remote.c @ 2055:c4d066d798c4 segacd
Fix prog RAM banking and Genesis to SCD cycle conversion. Arkagis Escape demo now works
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 18 Jan 2022 23:54:02 -0800 |
parents | 3a46ff899fa6 |
children | a7b753e260a2 f80c6111e1ae |
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 #include <unistd.h> |
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22 #endif |
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23 |
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24 #include "gdb_remote.h" |
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25 #include "68kinst.h" |
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26 #include "debug.h" |
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27 #include "util.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 |
1965
3a46ff899fa6
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135 static uint8_t m68k_read_byte(m68k_context *context, uint32_t address) |
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136 { |
1965
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137 //TODO: share this implementation with builtin debugger |
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138 return read_byte(address, (void **)context->mem_pointers, &context->options->gen, context); |
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139 } |
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140 |
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141 void m68k_write_byte(m68k_context * context, uint32_t address, uint8_t value) |
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142 { |
801
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143 genesis_context *gen = context->system; |
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144 //TODO: Use generated read/write functions so that memory map is properly respected |
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145 uint16_t * word = get_native_pointer(address & 0xFFFFFFFE, (void **)context->mem_pointers, &context->options->gen); |
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146 if (word) { |
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147 if (address & 1) { |
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148 *word = (*word & 0xFF00) | value; |
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149 } else { |
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150 *word = (*word & 0xFF) | value << 8; |
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151 } |
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152 //TODO: Deal with this more generally once m68k_handle_code_write can handle it |
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153 if (address >= 0xE00000) { |
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154 m68k_handle_code_write(address, context); |
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155 } |
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156 return; |
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157 } |
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158 if (address >= 0xA00000 && address < 0xA04000) { |
1103
22e87b739ad6
WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
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159 gen->zram[address & 0x1FFF] = value; |
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160 genesis_context * gen = context->system; |
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161 #if !defined(NO_Z80) && !defined(NEW_CORE) |
804
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162 z80_handle_code_write(address & 0x1FFF, gen->z80); |
548
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163 #endif |
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164 return; |
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165 } else { |
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166 return; |
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167 } |
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168 } |
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169 |
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170 void gdb_run_command(m68k_context * context, uint32_t pc, char * command) |
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171 { |
515
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172 char send_buf[512]; |
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173 dfprintf(stderr, "Received command %s\n", command); |
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174 switch(*command) |
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175 { |
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176 |
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177 case 'c': |
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178 if (*(command+1) != 0) { |
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179 //TODO: implement resuming at an arbitrary address |
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180 goto not_impl; |
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181 } |
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182 cont = 1; |
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183 expect_break_response = 1; |
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184 break; |
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185 case 's': { |
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186 if (*(command+1) != 0) { |
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187 //TODO: implement resuming at an arbitrary address |
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188 goto not_impl; |
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189 } |
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190 m68kinst inst; |
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191 genesis_context *gen = context->system; |
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192 uint16_t * pc_ptr = get_native_pointer(pc, (void **)context->mem_pointers, &context->options->gen); |
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193 if (!pc_ptr) { |
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).
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194 fatal_error("Entered gdb remote debugger stub at address %X\n", pc); |
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195 } |
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196 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF); |
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197 uint32_t after = pc + (after_pc-pc_ptr)*2; |
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198 |
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199 if (inst.op == M68K_RTS) { |
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200 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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201 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) { |
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202 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1); |
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203 } else if(m68k_is_branch(&inst)) { |
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204 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) { |
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205 branch_f = after; |
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206 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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2eb54e24914e
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207 insert_breakpoint(context, branch_t, gdb_debug_enter); |
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208 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) { |
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209 branch_t = after; |
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210 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
1111
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211 insert_breakpoint(context, branch_f, gdb_debug_enter); |
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212 } else { |
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213 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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214 } |
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215 } |
1111
2eb54e24914e
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|
216 insert_breakpoint(context, after, gdb_debug_enter); |
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217 |
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218 cont = 1; |
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219 expect_break_response = 1; |
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220 break; |
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221 } |
515
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222 case 'H': |
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223 if (command[1] == 'g' || command[1] == 'c') {; |
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224 //no thread suport, just acknowledge |
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225 gdb_send_command("OK"); |
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226 } else { |
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227 goto not_impl; |
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228 } |
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229 break; |
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230 case 'Z': { |
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231 uint8_t type = command[1]; |
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232 if (type < '2') { |
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233 uint32_t address = strtoul(command+3, NULL, 16); |
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234 insert_breakpoint(context, address, gdb_debug_enter); |
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235 bp_def *new_bp = malloc(sizeof(bp_def)); |
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236 new_bp->next = breakpoints; |
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237 new_bp->address = address; |
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238 new_bp->index = bp_index++; |
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239 breakpoints = new_bp; |
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240 gdb_send_command("OK"); |
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241 } else { |
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242 //watchpoints are not currently supported |
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243 gdb_send_command(""); |
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244 } |
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245 break; |
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246 } |
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247 case 'z': { |
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248 uint8_t type = command[1]; |
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249 if (type < '2') { |
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250 uint32_t address = strtoul(command+3, NULL, 16); |
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251 remove_breakpoint(context, address); |
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252 bp_def **found = find_breakpoint(&breakpoints, address); |
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253 if (*found) |
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254 { |
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255 bp_def * to_remove = *found; |
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256 *found = to_remove->next; |
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257 free(to_remove); |
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258 } |
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259 gdb_send_command("OK"); |
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260 } else { |
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261 //watchpoints are not currently supported |
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262 gdb_send_command(""); |
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263 } |
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264 break; |
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265 } |
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266 case 'g': { |
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267 char * cur = send_buf; |
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268 for (int i = 0; i < 8; i++) |
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269 { |
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270 hex_32(context->dregs[i], cur); |
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271 cur += 8; |
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272 } |
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273 for (int i = 0; i < 8; i++) |
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274 { |
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275 hex_32(context->aregs[i], cur); |
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276 cur += 8; |
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277 } |
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278 hex_32(calc_status(context), cur); |
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279 cur += 8; |
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280 hex_32(pc, cur); |
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281 cur += 8; |
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282 *cur = 0; |
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283 gdb_send_command(send_buf); |
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284 break; |
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285 } |
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286 case 'm': { |
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287 char * rest; |
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288 uint32_t address = strtoul(command+1, &rest, 16); |
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289 uint32_t size = strtoul(rest+1, NULL, 16); |
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290 if (size > (sizeof(send_buf)-1)/2) { |
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291 size = (sizeof(send_buf)-1)/2; |
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292 } |
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293 char *cur = send_buf; |
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294 while (size) |
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295 { |
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296 hex_8(m68k_read_byte(context, address), cur); |
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297 cur += 2; |
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298 address++; |
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299 size--; |
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300 } |
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301 *cur = 0; |
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302 gdb_send_command(send_buf); |
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303 break; |
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304 } |
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305 case 'M': { |
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306 char * rest; |
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307 uint32_t address = strtoul(command+1, &rest, 16); |
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308 uint32_t size = strtoul(rest+1, &rest, 16); |
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309 |
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310 char *cur = rest+1; |
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311 while (size) |
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312 { |
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313 char tmp[3]; |
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314 tmp[0] = *(cur++); |
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315 tmp[1] = *(cur++); |
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316 tmp[2] = 0; |
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317 m68k_write_byte(context, address, strtoul(tmp, NULL, 16)); |
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318 address++; |
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319 size--; |
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320 } |
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321 gdb_send_command("OK"); |
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322 break; |
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323 } |
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324 case 'X': |
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325 //binary transfers aren't supported currently as I don't feel like dealing with the escaping |
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326 gdb_send_command(""); |
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327 break; |
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328 case 'p': { |
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329 unsigned long reg = strtoul(command+1, NULL, 16); |
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330 |
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331 if (reg < 8) { |
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332 hex_32(context->dregs[reg], send_buf); |
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333 } else if (reg < 16) { |
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334 hex_32(context->aregs[reg-8], send_buf); |
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335 } else if (reg == 16) { |
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336 hex_32(calc_status(context), send_buf); |
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337 } else if (reg == 17) { |
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338 hex_32(pc, send_buf); |
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339 } else { |
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340 send_buf[0] = 0; |
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341 } |
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342 send_buf[8] = 0; |
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343 gdb_send_command(send_buf); |
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344 break; |
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345 } |
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346 case 'P': { |
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347 char *after = NULL; |
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348 unsigned long reg = strtoul(command+1, &after, 16); |
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349 uint32_t value = strtoul(after+1, NULL, 16); |
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350 |
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351 if (reg < 8) { |
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352 context->dregs[reg] = value; |
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353 } else if (reg < 16) { |
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354 context->aregs[reg-8] = value; |
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355 } else if (reg == 16) { |
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356 update_status(context, value); |
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357 } else { |
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358 //supporting updates to PC is going to be a pain |
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359 gdb_send_command("E01"); |
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360 break; |
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361 } |
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362 gdb_send_command("OK"); |
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363 break; |
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364 } |
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365 case 'q': |
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366 if (!memcmp("Supported", command+1, strlen("Supported"))) { |
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367 sprintf(send_buf, "PacketSize=%X", (int)bufsize); |
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368 gdb_send_command(send_buf); |
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369 } else if (!memcmp("Attached", command+1, strlen("Attached"))) { |
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370 //not really meaningful for us, but saying we spawned a new process |
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371 //is probably closest to the truth |
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372 gdb_send_command("0"); |
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373 } else if (!memcmp("Offsets", command+1, strlen("Offsets"))) { |
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374 //no relocations, so offsets are all 0 |
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375 gdb_send_command("Text=0;Data=0;Bss=0"); |
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376 } else if (!memcmp("Symbol", command+1, strlen("Symbol"))) { |
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377 gdb_send_command(""); |
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378 } else if (!memcmp("TStatus", command+1, strlen("TStatus"))) { |
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379 //TODO: actual tracepoint support |
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380 gdb_send_command("T0;tnotrun:0"); |
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381 } else if (!memcmp("TfV", command+1, strlen("TfV")) || !memcmp("TfP", command+1, strlen("TfP"))) { |
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382 //TODO: actual tracepoint support |
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383 gdb_send_command(""); |
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384 } else if (command[1] == 'C') { |
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385 //we only support a single thread currently, so send 1 |
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386 gdb_send_command("QC1"); |
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387 } else if (!strcmp("fThreadInfo", command + 1)) { |
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388 //we only support a single thread currently, so send 1 |
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389 gdb_send_command("m1"); |
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390 } else if (!strcmp("sThreadInfo", command + 1)) { |
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391 gdb_send_command("l"); |
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392 } else if (!memcmp("ThreadExtraInfo", command+1, strlen("ThreadExtraInfo"))) { |
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393 gdb_send_command(""); |
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394 } else if (command[1] == 'P') { |
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395 gdb_send_command(""); |
515
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396 } else { |
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397 goto not_impl; |
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398 } |
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399 break; |
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400 case 'v': |
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401 if (!memcmp("Cont?", command+1, strlen("Cont?"))) { |
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402 gdb_send_command("vCont;c;C;s;S"); |
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403 } else if (!strcmp("MustReplyEmpty", command + 1)) { |
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404 gdb_send_command(""); |
515
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405 } else if (!memcmp("Cont;", command+1, strlen("Cont;"))) { |
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406 switch (*(command + 1 + strlen("Cont;"))) |
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407 { |
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408 case 'c': |
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409 case 'C': |
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410 //might be interesting to have continue with signal fire a |
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411 //trap exception or something, but for no we'll treat it as |
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412 //a normal continue |
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413 cont = 1; |
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414 expect_break_response = 1; |
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415 break; |
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416 case 's': |
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417 case 'S': { |
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418 m68kinst inst; |
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419 genesis_context *gen = context->system; |
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420 uint16_t * pc_ptr = get_native_pointer(pc, (void **)context->mem_pointers, &context->options->gen); |
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421 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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422 fatal_error("Entered gdb remote debugger stub at address %X\n", pc); |
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423 } |
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424 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF); |
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425 uint32_t after = pc + (after_pc-pc_ptr)*2; |
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426 |
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427 if (inst.op == M68K_RTS) { |
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428 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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429 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) { |
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430 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1); |
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431 } else if(m68k_is_branch(&inst)) { |
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432 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) { |
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433 branch_f = after; |
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434 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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435 insert_breakpoint(context, branch_t, gdb_debug_enter); |
525
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436 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) { |
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437 branch_t = after; |
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438 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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439 insert_breakpoint(context, branch_f, gdb_debug_enter); |
525
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diff
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|
440 } else { |
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diff
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441 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF; |
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515
diff
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|
442 } |
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Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
443 } |
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
|
444 insert_breakpoint(context, after, gdb_debug_enter); |
525
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diff
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|
445 |
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diff
changeset
|
446 cont = 1; |
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parents:
515
diff
changeset
|
447 expect_break_response = 1; |
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parents:
515
diff
changeset
|
448 break; |
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Support single stepping in gdb remote debugger
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parents:
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diff
changeset
|
449 } |
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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diff
changeset
|
450 default: |
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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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diff
changeset
|
451 goto not_impl; |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents:
505
diff
changeset
|
452 } |
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
|
453 } else { |
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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
|
454 goto not_impl; |
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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:
505
diff
changeset
|
455 } |
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:
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diff
changeset
|
456 break; |
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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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diff
changeset
|
457 case '?': |
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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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diff
changeset
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458 gdb_send_command("S05"); |
1495179d6737
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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changeset
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459 break; |
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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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diff
changeset
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460 default: |
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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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diff
changeset
|
461 goto not_impl; |
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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:
505
diff
changeset
|
462 |
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.
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parents:
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diff
changeset
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464 return; |
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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 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:
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diff
changeset
|
466 fatal_error("Command %s is not implemented, exiting...\n", command); |
515
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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 } |
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 |
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
|
469 void gdb_debug_enter(m68k_context * context, uint32_t 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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parents:
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diff
changeset
|
470 { |
525
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parents:
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diff
changeset
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471 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.
Mike Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
472 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:
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diff
changeset
|
473 gdb_send_command("S05"); |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents:
505
diff
changeset
|
474 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
|
475 } |
525
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Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
476 if ((pc & 0xFFFFFF) == branch_t) { |
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parents:
515
diff
changeset
|
477 bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f); |
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Support single stepping in gdb remote debugger
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parents:
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diff
changeset
|
478 if (!*f_bp) { |
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parents:
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diff
changeset
|
479 remove_breakpoint(context, branch_f); |
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Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
480 } |
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Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
481 branch_t = branch_f = 0; |
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parents:
515
diff
changeset
|
482 } else if((pc & 0xFFFFFF) == branch_f) { |
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Support single stepping in gdb remote debugger
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parents:
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diff
changeset
|
483 bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t); |
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Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
484 if (!*t_bp) { |
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Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
485 remove_breakpoint(context, branch_t); |
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Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
486 } |
62860044337d
Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents:
515
diff
changeset
|
487 branch_t = branch_f = 0; |
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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 //Check if this is a user set breakpoint, or just a temporary one |
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Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
490 bp_def ** this_bp = find_breakpoint(&breakpoints, pc & 0xFFFFFF); |
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Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
491 if (!*this_bp) { |
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Support single stepping in gdb remote debugger
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parents:
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diff
changeset
|
492 remove_breakpoint(context, pc & 0xFFFFFF); |
62860044337d
Support single stepping in gdb remote debugger
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parents:
515
diff
changeset
|
493 } |
456
249d24973682
Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
494 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
|
495 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
|
496 uint8_t partial = 0; |
456
249d24973682
Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
497 while(!cont) |
249d24973682
Initial work on GDB remote debugging support
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parents:
diff
changeset
|
498 { |
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
|
499 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
|
500 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
|
501 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
|
502 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
|
503 } |
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
565
diff
changeset
|
504 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
|
505 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
|
506 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
|
507 } 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
|
508 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
|
509 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.
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parents:
505
diff
changeset
|
510 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
|
511 } |
1245
42fb3ee1e92c
Fix direct usage of read rather than GDB_READ in gdb_remote.c
Michael Pavone <pavone@retrodev.com>
parents:
1189
diff
changeset
|
512 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
|
513 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
|
514 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
|
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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
516 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
|
517 { |
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
|
518 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
|
519 { |
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
|
520 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
|
521 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
|
522 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
|
523 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
|
524 } |
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 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
|
526 //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
|
527 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
|
528 //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
|
529 //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
|
530 *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
|
531 //send acknowledgement |
802
6811f601008f
Old changes for GDB remote debugging on Windows I forgot to commit
Michael Pavone <pavone@retrodev.com>
parents:
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diff
changeset
|
532 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:
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diff
changeset
|
533 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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parents:
505
diff
changeset
|
534 } |
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents:
505
diff
changeset
|
535 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
536 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.
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537 } |
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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538 } 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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539 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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540 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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541 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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542 } |
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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543 } else { |
525
62860044337d
Support single stepping in gdb remote debugger
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544 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.
Michael Pavone <pavone@retrodev.com>
parents:
467
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545 } |
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
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546 } |
515
1495179d6737
Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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547 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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548 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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549 } |
456
249d24973682
Initial work on GDB remote debugging support
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550 } |
249d24973682
Initial work on GDB remote debugging support
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551 } |
249d24973682
Initial work on GDB remote debugging support
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552 |
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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553 void gdb_remote_init(void) |
456
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554 { |
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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555 buf = malloc(INITIAL_BUFFER_SIZE); |
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556 curbuf = NULL; |
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557 bufsize = INITIAL_BUFFER_SIZE; |
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558 #ifdef _WIN32 |
1949
5a76a7373823
Get WIP net play code compiling on Windows and cleanup some unistd.h includes
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559 socket_init(); |
802
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560 |
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561 struct addrinfo request, *result; |
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562 memset(&request, 0, sizeof(request)); |
1189
75ba222877f7
Force IPV4 for GDB remote debugging on Windows. Bind to localhost instead of unspecified address since listening on external ports probably isn't a good idea in the general case
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563 request.ai_family = AF_INET; |
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564 request.ai_socktype = SOCK_STREAM; |
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565 request.ai_flags = AI_PASSIVE; |
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75ba222877f7
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566 getaddrinfo("localhost", "1234", &request, &result); |
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567 |
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568 int listen_sock = socket(result->ai_family, result->ai_socktype, result->ai_protocol); |
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569 if (listen_sock < 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
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570 fatal_error("Failed to open GDB remote debugging socket"); |
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571 } |
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572 if (bind(listen_sock, result->ai_addr, result->ai_addrlen) < 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
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parents:
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573 fatal_error("Failed to bind GDB remote debugging socket"); |
802
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574 } |
1945
ba7231d2411c
Fix addrinfo leak in GDB remote debug support
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575 freeaddrinfo(result); |
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576 if (listen(listen_sock, 1) < 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
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parents:
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577 fatal_error("Failed to listen on GDB remote debugging socket"); |
802
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parents:
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diff
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578 } |
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579 gdb_sock = accept(listen_sock, NULL, NULL); |
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parents:
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580 if (gdb_sock < 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
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parents:
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diff
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581 fatal_error("accept returned an error while listening on GDB remote debugging socket"); |
802
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Old changes for GDB remote debugging on Windows I forgot to commit
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parents:
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diff
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582 } |
1949
5a76a7373823
Get WIP net play code compiling on Windows and cleanup some unistd.h includes
Michael Pavone <pavone@retrodev.com>
parents:
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583 socket_close(listen_sock); |
1792
52a47611a273
Avoid printing a bunch of junk to stdout when GDB remote debugging is enabled as this can confuse GDB
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diff
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584 #else |
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Avoid printing a bunch of junk to stdout when GDB remote debugging is enabled as this can confuse GDB
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585 disable_stdout_messages(); |
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parents:
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586 #endif |
456
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587 } |