diff options
Diffstat (limited to 'gdb/gdbserver/server.c')
| -rw-r--r-- | gdb/gdbserver/server.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c new file mode 100644 index 00000000000..cdec0f8a931 --- /dev/null +++ b/gdb/gdbserver/server.c @@ -0,0 +1,258 @@ +/* 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 (argv, statusptr) + 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 (argc, argv) + int argc; + char *argv[]; +{ + char ch, status, own_buf[2000], 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 ...]"); + + /* 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 (); + } + } +} |