/* Main code for remote server for GDB. Copyright (C) 1989, 1993 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "server.h" int cont_thread; int general_thread; int thread_from_wait; int old_thread_from_wait; int extended_protocol; jmp_buf toplevel; int inferior_pid; static unsigned char start_inferior (char *argv[], char *statusptr) { inferior_pid = create_inferior (argv[0], argv); fprintf (stderr, "Process %s created; pid = %d\n", argv[0], inferior_pid); /* Wait till we are at 1st instruction in program, return signal number. */ return mywait (statusptr); } extern int remote_debug; int main (int argc, char *argv[]) { char ch, status, own_buf[PBUFSIZ], mem_buf[2000]; int i = 0; unsigned char signal; unsigned int len; CORE_ADDR mem_addr; if (setjmp (toplevel)) { fprintf (stderr, "Exiting\n"); exit (1); } if (argc < 3) error ("Usage: gdbserver tty prog [args ...]"); initialize_low (); /* Wait till we are at first instruction in program. */ signal = start_inferior (&argv[2], &status); /* We are now stopped at the first instruction of the target process */ while (1) { remote_open (argv[1]); restart: setjmp (toplevel); while (getpkt (own_buf) > 0) { unsigned char sig; i = 0; ch = own_buf[i++]; switch (ch) { case 'd': remote_debug = !remote_debug; break; case '!': extended_protocol = 1; prepare_resume_reply (own_buf, status, signal); break; case '?': prepare_resume_reply (own_buf, status, signal); break; case 'H': switch (own_buf[1]) { case 'g': general_thread = strtol (&own_buf[2], NULL, 16); write_ok (own_buf); fetch_inferior_registers (0); break; case 'c': cont_thread = strtol (&own_buf[2], NULL, 16); write_ok (own_buf); break; default: /* Silently ignore it so that gdb can extend the protocol without compatibility headaches. */ own_buf[0] = '\0'; break; } break; case 'g': convert_int_to_ascii (registers, own_buf, REGISTER_BYTES); break; case 'G': convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES); store_inferior_registers (-1); write_ok (own_buf); break; case 'm': decode_m_packet (&own_buf[1], &mem_addr, &len); read_inferior_memory (mem_addr, mem_buf, len); convert_int_to_ascii (mem_buf, own_buf, len); break; case 'M': decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); if (write_inferior_memory (mem_addr, mem_buf, len) == 0) write_ok (own_buf); else write_enn (own_buf); break; case 'C': convert_ascii_to_int (own_buf + 1, &sig, 1); myresume (0, sig); signal = mywait (&status); prepare_resume_reply (own_buf, status, signal); break; case 'S': convert_ascii_to_int (own_buf + 1, &sig, 1); myresume (1, sig); signal = mywait (&status); prepare_resume_reply (own_buf, status, signal); break; case 'c': myresume (0, 0); signal = mywait (&status); prepare_resume_reply (own_buf, status, signal); break; case 's': myresume (1, 0); signal = mywait (&status); prepare_resume_reply (own_buf, status, signal); break; case 'k': fprintf (stderr, "Killing inferior\n"); kill_inferior (); /* When using the extended protocol, we start up a new debugging session. The traditional protocol will exit instead. */ if (extended_protocol) { write_ok (own_buf); fprintf (stderr, "GDBserver restarting\n"); /* Wait till we are at 1st instruction in prog. */ signal = start_inferior (&argv[2], &status); goto restart; break; } else { exit (0); break; } case 'T': if (mythread_alive (strtol (&own_buf[1], NULL, 16))) write_ok (own_buf); else write_enn (own_buf); break; case 'R': /* Restarting the inferior is only supported in the extended protocol. */ if (extended_protocol) { kill_inferior (); write_ok (own_buf); fprintf (stderr, "GDBserver restarting\n"); /* Wait till we are at 1st instruction in prog. */ signal = start_inferior (&argv[2], &status); goto restart; break; } else { /* It is a request we don't understand. Respond with an empty packet so that gdb knows that we don't support this request. */ own_buf[0] = '\0'; break; } default: /* It is a request we don't understand. Respond with an empty packet so that gdb knows that we don't support this request. */ own_buf[0] = '\0'; break; } putpkt (own_buf); if (status == 'W') fprintf (stderr, "\nChild exited with status %d\n", sig); if (status == 'X') fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig); if (status == 'W' || status == 'X') { if (extended_protocol) { fprintf (stderr, "Killing inferior\n"); kill_inferior (); write_ok (own_buf); fprintf (stderr, "GDBserver restarting\n"); /* Wait till we are at 1st instruction in prog. */ signal = start_inferior (&argv[2], &status); goto restart; break; } else { fprintf (stderr, "GDBserver exiting\n"); exit (0); } } } /* We come here when getpkt fails. For the extended remote protocol we exit (and this is the only way we gracefully exit!). For the traditional remote protocol close the connection, and re-open it at the top of the loop. */ if (extended_protocol) { remote_close (); exit (0); } else { fprintf (stderr, "Remote side has terminated connection. GDBserver will reopen the connection.\n"); remote_close (); } } }