| /* Main code for remote server for GDB. |
| Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000 |
| 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 (); |
| } |
| } |
| } |