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[/] [or1k/] [trunk/] [gdb-5.0/] [gdb/] [gdbserver/] [server.c] - Blame information for rev 1774

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1 106 markom 
/* 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,
19 
   Boston, MA 02111-1307, USA.  */
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);
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  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;
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     char *argv[];
49 
{
50 
  char ch, status, own_buf[PBUFSIZ], mem_buf[2000];
51 
  int i = 0;
52 
  unsigned char signal;
53 
  unsigned int len;
54 
  CORE_ADDR mem_addr;
55 
 
56 
  if (setjmp (toplevel))
57 
    {
58 
      fprintf (stderr, "Exiting\n");
59 
      exit (1);
60 
    }
61 
 
62 
  if (argc < 3)
63 
    error ("Usage: gdbserver tty prog [args ...]");
64 
 
65 
  initialize_low ();
66 
 
67 
  /* Wait till we are at first instruction in program.  */
68 
  signal = start_inferior (&argv[2], &status);
69 
 
70 
  /* We are now stopped at the first instruction of the target process */
71 
 
72 
  while (1)
73 
    {
74 
      remote_open (argv[1]);
75 
 
76 
    restart:
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      setjmp (toplevel);
78 
      while (getpkt (own_buf) > 0)
79 
        {
80 
          unsigned char sig;
81 
          i = 0;
82 
          ch = own_buf[i++];
83 
          switch (ch)
84 
            {
85 
            case 'd':
86 
              remote_debug = !remote_debug;
87 
              break;
88 
            case '!':
89 
              extended_protocol = 1;
90 
              prepare_resume_reply (own_buf, status, signal);
91 
              break;
92 
            case '?':
93 
              prepare_resume_reply (own_buf, status, signal);
94 
              break;
95 
            case 'H':
96 
              switch (own_buf[1])
97 
                {
98 
                case 'g':
99 
                  general_thread = strtol (&own_buf[2], NULL, 16);
100 
                  write_ok (own_buf);
101 
                  fetch_inferior_registers (0);
102 
                  break;
103 
                case 'c':
104 
                  cont_thread = strtol (&own_buf[2], NULL, 16);
105 
                  write_ok (own_buf);
106 
                  break;
107 
                default:
108 
                  /* Silently ignore it so that gdb can extend the protocol
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                     without compatibility headaches.  */
110 
                  own_buf[0] = '\0';
111 
                  break;
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                }
113 
              break;
114 
            case 'g':
115 
              convert_int_to_ascii (registers, own_buf, REGISTER_BYTES);
116 
              break;
117 
            case 'G':
118 
              convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES);
119 
              store_inferior_registers (-1);
120 
              write_ok (own_buf);
121 
              break;
122 
            case 'm':
123 
              decode_m_packet (&own_buf[1], &mem_addr, &len);
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              read_inferior_memory (mem_addr, mem_buf, len);
125 
              convert_int_to_ascii (mem_buf, own_buf, len);
126 
              break;
127 
            case 'M':
128 
              decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf);
129 
              if (write_inferior_memory (mem_addr, mem_buf, len) == 0)
130 
                write_ok (own_buf);
131 
              else
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                write_enn (own_buf);
133 
              break;
134 
            case 'C':
135 
              convert_ascii_to_int (own_buf + 1, &sig, 1);
136 
              myresume (0, sig);
137 
              signal = mywait (&status);
138 
              prepare_resume_reply (own_buf, status, signal);
139 
              break;
140 
            case 'S':
141 
              convert_ascii_to_int (own_buf + 1, &sig, 1);
142 
              myresume (1, sig);
143 
              signal = mywait (&status);
144 
              prepare_resume_reply (own_buf, status, signal);
145 
              break;
146 
            case 'c':
147 
              myresume (0, 0);
148 
              signal = mywait (&status);
149 
              prepare_resume_reply (own_buf, status, signal);
150 
              break;
151 
            case 's':
152 
              myresume (1, 0);
153 
              signal = mywait (&status);
154 
              prepare_resume_reply (own_buf, status, signal);
155 
              break;
156 
            case 'k':
157 
              fprintf (stderr, "Killing inferior\n");
158 
              kill_inferior ();
159 
              /* When using the extended protocol, we start up a new
160 
                 debugging session.   The traditional protocol will
161 
                 exit instead.  */
162 
              if (extended_protocol)
163 
                {
164 
                  write_ok (own_buf);
165 
                  fprintf (stderr, "GDBserver restarting\n");
166 
 
167 
                  /* Wait till we are at 1st instruction in prog.  */
168 
                  signal = start_inferior (&argv[2], &status);
169 
                  goto restart;
170 
                  break;
171 
                }
172 
              else
173 
                {
174 
                  exit (0);
175 
                  break;
176 
                }
177 
            case 'T':
178 
              if (mythread_alive (strtol (&own_buf[1], NULL, 16)))
179 
                write_ok (own_buf);
180 
              else
181 
                write_enn (own_buf);
182 
              break;
183 
            case 'R':
184 
              /* Restarting the inferior is only supported in the
185 
                 extended protocol.  */
186 
              if (extended_protocol)
187 
                {
188 
                  kill_inferior ();
189 
                  write_ok (own_buf);
190 
                  fprintf (stderr, "GDBserver restarting\n");
191 
 
192 
                  /* Wait till we are at 1st instruction in prog.  */
193 
                  signal = start_inferior (&argv[2], &status);
194 
                  goto restart;
195 
                  break;
196 
                }
197 
              else
198 
                {
199 
                  /* It is a request we don't understand.  Respond with an
200 
                     empty packet so that gdb knows that we don't support this
201 
                     request.  */
202 
                  own_buf[0] = '\0';
203 
                  break;
204 
                }
205 
            default:
206 
              /* It is a request we don't understand.  Respond with an
207 
                 empty packet so that gdb knows that we don't support this
208 
                 request.  */
209 
              own_buf[0] = '\0';
210 
              break;
211 
            }
212 
 
213 
          putpkt (own_buf);
214 
 
215 
          if (status == 'W')
216 
            fprintf (stderr,
217 
                     "\nChild exited with status %d\n", sig);
218 
          if (status == 'X')
219 
            fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig);
220 
          if (status == 'W' || status == 'X')
221 
            {
222 
              if (extended_protocol)
223 
                {
224 
                  fprintf (stderr, "Killing inferior\n");
225 
                  kill_inferior ();
226 
                  write_ok (own_buf);
227 
                  fprintf (stderr, "GDBserver restarting\n");
228 
 
229 
                  /* Wait till we are at 1st instruction in prog.  */
230 
                  signal = start_inferior (&argv[2], &status);
231 
                  goto restart;
232 
                  break;
233 
                }
234 
              else
235 
                {
236 
                  fprintf (stderr, "GDBserver exiting\n");
237 
                  exit (0);
238 
                }
239 
            }
240 
        }
241 
 
242 
      /* We come here when getpkt fails.
243 
 
244 
         For the extended remote protocol we exit (and this is the only
245 
         way we gracefully exit!).
246 
 
247 
         For the traditional remote protocol close the connection,
248 
         and re-open it at the top of the loop.  */
249 
      if (extended_protocol)
250 
        {
251 
          remote_close ();
252 
          exit (0);
253 
        }
254 
      else
255 
        {
256 
          fprintf (stderr, "Remote side has terminated connection.  GDBserver will reopen the connection.\n");
257 
 
258 
          remote_close ();
259 
        }
260 
    }
261 
}

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