[binutils.git] / gdb / gdbserver / server.c

/* 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[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 ...]");

  /* 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 ();
	}
    }
}
Commit	Line	Data
c906108c SS	1	/* Main code for remote server for GDB.
	2	Copyright (C) 1989, 1993 Free Software Foundation, Inc.
	3
c5aa993b	4	This file is part of GDB.
c906108c	5
c5aa993b JM	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.
c906108c	10
c5aa993b JM	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.
c906108c	15
c5aa993b JM	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,
	19	Boston, MA 02111-1307, USA. */
c906108c SS	20
	21	#include "server.h"
	22
	23	int cont_thread;
	24	int general_thread;
	25	int thread_from_wait;
	26	int old_thread_from_wait;
	27	int extended_protocol;
	28	jmp_buf toplevel;
	29	int inferior_pid;
	30
	31	static unsigned char
	32	start_inferior (argv, statusptr)
	33	char *argv[];
	34	char *statusptr;
	35	{
	36	inferior_pid = create_inferior (argv[0], argv);
	37	fprintf (stderr, "Process %s created; pid = %d\n", argv[0], inferior_pid);
	38
	39	/* Wait till we are at 1st instruction in program, return signal number. */
	40	return mywait (statusptr);
	41	}
	42
	43	extern int remote_debug;
	44
	45	int
	46	main (argc, argv)
	47	int argc;
	48	char *argv[];
	49	{
5c44784c	50	char ch, status, own_buf[PBUFSIZ], mem_buf[2000];
c906108c SS	51	int i = 0;
	52	unsigned char signal;
	53	unsigned int len;
	54	CORE_ADDR mem_addr;
	55
c5aa993b	56	if (setjmp (toplevel))
c906108c	57	{
c5aa993b JM	58	fprintf (stderr, "Exiting\n");
c5aa993b JM	59	exit (1);
c906108c SS	60	}
	61
	62	if (argc < 3)
c5aa993b	63	error ("Usage: gdbserver tty prog [args ...]");
c906108c SS	64
	65	/* Wait till we are at first instruction in program. */
	66	signal = start_inferior (&argv[2], &status);
	67
	68	/* We are now stopped at the first instruction of the target process */
	69
	70	while (1)
	71	{
	72	remote_open (argv[1]);
	73
c5aa993b JM	74	restart:
c5aa993b JM	75	setjmp (toplevel);
c906108c SS	76	while (getpkt (own_buf) > 0)
	77	{
	78	unsigned char sig;
	79	i = 0;
	80	ch = own_buf[i++];
	81	switch (ch)
	82	{
	83	case 'd':
	84	remote_debug = !remote_debug;
	85	break;
	86	case '!':
	87	extended_protocol = 1;
	88	prepare_resume_reply (own_buf, status, signal);
	89	break;
	90	case '?':
	91	prepare_resume_reply (own_buf, status, signal);
	92	break;
	93	case 'H':
	94	switch (own_buf[1])
	95	{
	96	case 'g':
	97	general_thread = strtol (&own_buf[2], NULL, 16);
	98	write_ok (own_buf);
	99	fetch_inferior_registers (0);
	100	break;
	101	case 'c':
	102	cont_thread = strtol (&own_buf[2], NULL, 16);
	103	write_ok (own_buf);
	104	break;
	105	default:
	106	/* Silently ignore it so that gdb can extend the protocol
	107	without compatibility headaches. */
	108	own_buf[0] = '\0';
	109	break;
	110	}
	111	break;
	112	case 'g':
	113	convert_int_to_ascii (registers, own_buf, REGISTER_BYTES);
	114	break;
	115	case 'G':
	116	convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES);
	117	store_inferior_registers (-1);
	118	write_ok (own_buf);
	119	break;
	120	case 'm':
	121	decode_m_packet (&own_buf[1], &mem_addr, &len);
	122	read_inferior_memory (mem_addr, mem_buf, len);
	123	convert_int_to_ascii (mem_buf, own_buf, len);
	124	break;
	125	case 'M':
	126	decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf);
	127	if (write_inferior_memory (mem_addr, mem_buf, len) == 0)
	128	write_ok (own_buf);
	129	else
	130	write_enn (own_buf);
	131	break;
	132	case 'C':
	133	convert_ascii_to_int (own_buf + 1, &sig, 1);
	134	myresume (0, sig);
	135	signal = mywait (&status);
	136	prepare_resume_reply (own_buf, status, signal);
	137	break;
	138	case 'S':
	139	convert_ascii_to_int (own_buf + 1, &sig, 1);
140	myresume (1, sig);
141	signal = mywait (&status);
142	prepare_resume_reply (own_buf, status, signal);
143	break;
144	case 'c':
145	myresume (0, 0);
146	signal = mywait (&status);
147	prepare_resume_reply (own_buf, status, signal);
148	break;
149	case 's':
150	myresume (1, 0);
151	signal = mywait (&status);
152	prepare_resume_reply (own_buf, status, signal);
153	break;
154	case 'k':
155	fprintf (stderr, "Killing inferior\n");
156	kill_inferior ();
157	/* When using the extended protocol, we start up a new
c5aa993b	158	debugging session. The traditional protocol will
c906108c SS	159	exit instead. */
	160	if (extended_protocol)
	161	{
	162	write_ok (own_buf);
	163	fprintf (stderr, "GDBserver restarting\n");
	164
	165	/* Wait till we are at 1st instruction in prog. */
	166	signal = start_inferior (&argv[2], &status);
	167	goto restart;
	168	break;
	169	}
	170	else
	171	{
	172	exit (0);
	173	break;
	174	}
	175	case 'T':
	176	if (mythread_alive (strtol (&own_buf[1], NULL, 16)))
	177	write_ok (own_buf);
	178	else
	179	write_enn (own_buf);
	180	break;
	181	case 'R':
	182	/* Restarting the inferior is only supported in the
c5aa993b	183	extended protocol. */
c906108c SS	184	if (extended_protocol)
	185	{
	186	kill_inferior ();
	187	write_ok (own_buf);
	188	fprintf (stderr, "GDBserver restarting\n");
	189
	190	/* Wait till we are at 1st instruction in prog. */
	191	signal = start_inferior (&argv[2], &status);
	192	goto restart;
	193	break;
	194	}
	195	else
	196	{
	197	/* It is a request we don't understand. Respond with an
	198	empty packet so that gdb knows that we don't support this
	199	request. */
	200	own_buf[0] = '\0';
	201	break;
	202	}
	203	default:
	204	/* It is a request we don't understand. Respond with an
c5aa993b JM	205	empty packet so that gdb knows that we don't support this
c5aa993b JM	206	request. */
c906108c SS	207	own_buf[0] = '\0';
	208	break;
	209	}
	210
	211	putpkt (own_buf);
	212
	213	if (status == 'W')
	214	fprintf (stderr,
	215	"\nChild exited with status %d\n", sig);
	216	if (status == 'X')
	217	fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig);
	218	if (status == 'W' \|\| status == 'X')
	219	{
	220	if (extended_protocol)
	221	{
	222	fprintf (stderr, "Killing inferior\n");
	223	kill_inferior ();
	224	write_ok (own_buf);
	225	fprintf (stderr, "GDBserver restarting\n");
	226
	227	/* Wait till we are at 1st instruction in prog. */
	228	signal = start_inferior (&argv[2], &status);
	229	goto restart;
	230	break;
	231	}
	232	else
	233	{
	234	fprintf (stderr, "GDBserver exiting\n");
	235	exit (0);
	236	}
	237	}
	238	}
	239
	240	/* We come here when getpkt fails.
	241
c5aa993b JM	242	For the extended remote protocol we exit (and this is the only
c5aa993b JM	243	way we gracefully exit!).
c906108c	244
c5aa993b JM	245	For the traditional remote protocol close the connection,
c5aa993b JM	246	and re-open it at the top of the loop. */
c906108c SS	247	if (extended_protocol)
	248	{
	249	remote_close ();
	250	exit (0);
	251	}
	252	else
	253	{
	254	fprintf (stderr, "Remote side has terminated connection. GDBserver will reopen the connection.\n");
	255
	256	remote_close ();
	257	}
	258	}
	259	}