| 1 | /* Main code for remote server for GDB. |
| 2 | Copyright (C) 1989, 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "server.h" |
| 21 | |
| 22 | int cont_thread; |
| 23 | int general_thread; |
| 24 | int thread_from_wait; |
| 25 | int old_thread_from_wait; |
| 26 | int extended_protocol; |
| 27 | jmp_buf toplevel; |
| 28 | int inferior_pid; |
| 29 | |
| 30 | static unsigned char |
| 31 | start_inferior (argv, statusptr) |
| 32 | char *argv[]; |
| 33 | char *statusptr; |
| 34 | { |
| 35 | inferior_pid = create_inferior (argv[0], argv); |
| 36 | fprintf (stderr, "Process %s created; pid = %d\n", argv[0], inferior_pid); |
| 37 | |
| 38 | /* Wait till we are at 1st instruction in program, return signal number. */ |
| 39 | return mywait (statusptr); |
| 40 | } |
| 41 | |
| 42 | extern int remote_debug; |
| 43 | |
| 44 | int |
| 45 | main (argc, argv) |
| 46 | int argc; |
| 47 | char *argv[]; |
| 48 | { |
| 49 | char ch, status, own_buf[2000], mem_buf[2000]; |
| 50 | int i = 0; |
| 51 | unsigned char signal; |
| 52 | unsigned int len; |
| 53 | CORE_ADDR mem_addr; |
| 54 | |
| 55 | if (setjmp(toplevel)) |
| 56 | { |
| 57 | fprintf(stderr, "Exiting\n"); |
| 58 | exit(1); |
| 59 | } |
| 60 | |
| 61 | if (argc < 3) |
| 62 | error("Usage: gdbserver tty prog [args ...]"); |
| 63 | |
| 64 | /* Wait till we are at first instruction in program. */ |
| 65 | signal = start_inferior (&argv[2], &status); |
| 66 | |
| 67 | /* We are now stopped at the first instruction of the target process */ |
| 68 | |
| 69 | while (1) |
| 70 | { |
| 71 | remote_open (argv[1]); |
| 72 | |
| 73 | restart: |
| 74 | setjmp(toplevel); |
| 75 | while (getpkt (own_buf) > 0) |
| 76 | { |
| 77 | unsigned char sig; |
| 78 | i = 0; |
| 79 | ch = own_buf[i++]; |
| 80 | switch (ch) |
| 81 | { |
| 82 | case 'd': |
| 83 | remote_debug = !remote_debug; |
| 84 | break; |
| 85 | case '!': |
| 86 | extended_protocol = 1; |
| 87 | prepare_resume_reply (own_buf, status, signal); |
| 88 | break; |
| 89 | case '?': |
| 90 | prepare_resume_reply (own_buf, status, signal); |
| 91 | break; |
| 92 | case 'H': |
| 93 | switch (own_buf[1]) |
| 94 | { |
| 95 | case 'g': |
| 96 | general_thread = strtol (&own_buf[2], NULL, 16); |
| 97 | write_ok (own_buf); |
| 98 | fetch_inferior_registers (0); |
| 99 | break; |
| 100 | case 'c': |
| 101 | cont_thread = strtol (&own_buf[2], NULL, 16); |
| 102 | write_ok (own_buf); |
| 103 | break; |
| 104 | default: |
| 105 | /* Silently ignore it so that gdb can extend the protocol |
| 106 | without compatibility headaches. */ |
| 107 | own_buf[0] = '\0'; |
| 108 | break; |
| 109 | } |
| 110 | break; |
| 111 | case 'g': |
| 112 | convert_int_to_ascii (registers, own_buf, REGISTER_BYTES); |
| 113 | break; |
| 114 | case 'G': |
| 115 | convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES); |
| 116 | store_inferior_registers (-1); |
| 117 | write_ok (own_buf); |
| 118 | break; |
| 119 | case 'm': |
| 120 | decode_m_packet (&own_buf[1], &mem_addr, &len); |
| 121 | read_inferior_memory (mem_addr, mem_buf, len); |
| 122 | convert_int_to_ascii (mem_buf, own_buf, len); |
| 123 | break; |
| 124 | case 'M': |
| 125 | decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); |
| 126 | if (write_inferior_memory (mem_addr, mem_buf, len) == 0) |
| 127 | write_ok (own_buf); |
| 128 | else |
| 129 | write_enn (own_buf); |
| 130 | break; |
| 131 | case 'C': |
| 132 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 133 | myresume (0, sig); |
| 134 | signal = mywait (&status); |
| 135 | prepare_resume_reply (own_buf, status, signal); |
| 136 | break; |
| 137 | case 'S': |
| 138 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 139 | myresume (1, sig); |
| 140 | signal = mywait (&status); |
| 141 | prepare_resume_reply (own_buf, status, signal); |
| 142 | break; |
| 143 | case 'c': |
| 144 | myresume (0, 0); |
| 145 | signal = mywait (&status); |
| 146 | prepare_resume_reply (own_buf, status, signal); |
| 147 | break; |
| 148 | case 's': |
| 149 | myresume (1, 0); |
| 150 | signal = mywait (&status); |
| 151 | prepare_resume_reply (own_buf, status, signal); |
| 152 | break; |
| 153 | case 'k': |
| 154 | fprintf (stderr, "Killing inferior\n"); |
| 155 | kill_inferior (); |
| 156 | /* When using the extended protocol, we start up a new |
| 157 | debugging session. The traditional protocol will |
| 158 | exit instead. */ |
| 159 | if (extended_protocol) |
| 160 | { |
| 161 | write_ok (own_buf); |
| 162 | fprintf (stderr, "GDBserver restarting\n"); |
| 163 | |
| 164 | /* Wait till we are at 1st instruction in prog. */ |
| 165 | signal = start_inferior (&argv[2], &status); |
| 166 | goto restart; |
| 167 | break; |
| 168 | } |
| 169 | else |
| 170 | { |
| 171 | exit (0); |
| 172 | break; |
| 173 | } |
| 174 | case 'T': |
| 175 | if (mythread_alive (strtol (&own_buf[1], NULL, 16))) |
| 176 | write_ok (own_buf); |
| 177 | else |
| 178 | write_enn (own_buf); |
| 179 | break; |
| 180 | case 'R': |
| 181 | /* Restarting the inferior is only supported in the |
| 182 | extended protocol. */ |
| 183 | if (extended_protocol) |
| 184 | { |
| 185 | kill_inferior (); |
| 186 | write_ok (own_buf); |
| 187 | fprintf (stderr, "GDBserver restarting\n"); |
| 188 | |
| 189 | /* Wait till we are at 1st instruction in prog. */ |
| 190 | signal = start_inferior (&argv[2], &status); |
| 191 | goto restart; |
| 192 | break; |
| 193 | } |
| 194 | else |
| 195 | { |
| 196 | /* It is a request we don't understand. Respond with an |
| 197 | empty packet so that gdb knows that we don't support this |
| 198 | request. */ |
| 199 | own_buf[0] = '\0'; |
| 200 | break; |
| 201 | } |
| 202 | default: |
| 203 | /* It is a request we don't understand. Respond with an |
| 204 | empty packet so that gdb knows that we don't support this |
| 205 | request. */ |
| 206 | own_buf[0] = '\0'; |
| 207 | break; |
| 208 | } |
| 209 | |
| 210 | putpkt (own_buf); |
| 211 | |
| 212 | if (status == 'W') |
| 213 | fprintf (stderr, |
| 214 | "\nChild exited with status %d\n", sig); |
| 215 | if (status == 'X') |
| 216 | fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig); |
| 217 | if (status == 'W' || status == 'X') |
| 218 | { |
| 219 | if (extended_protocol) |
| 220 | { |
| 221 | fprintf (stderr, "Killing inferior\n"); |
| 222 | kill_inferior (); |
| 223 | write_ok (own_buf); |
| 224 | fprintf (stderr, "GDBserver restarting\n"); |
| 225 | |
| 226 | /* Wait till we are at 1st instruction in prog. */ |
| 227 | signal = start_inferior (&argv[2], &status); |
| 228 | goto restart; |
| 229 | break; |
| 230 | } |
| 231 | else |
| 232 | { |
| 233 | fprintf (stderr, "GDBserver exiting\n"); |
| 234 | exit (0); |
| 235 | } |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /* We come here when getpkt fails. |
| 240 | |
| 241 | For the extended remote protocol we exit (and this is the only |
| 242 | way we gracefully exit!). |
| 243 | |
| 244 | For the traditional remote protocol close the connection, |
| 245 | and re-open it at the top of the loop. */ |
| 246 | if (extended_protocol) |
| 247 | { |
| 248 | remote_close (); |
| 249 | exit (0); |
| 250 | } |
| 251 | else |
| 252 | { |
| 253 | fprintf (stderr, "Remote side has terminated connection. GDBserver will reopen the connection.\n"); |
| 254 | |
| 255 | remote_close (); |
| 256 | } |
| 257 | } |
| 258 | } |