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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"); |
59 | exit (1); | |
c906108c SS |
60 | } |
61 | ||
62 | if (argc < 3) | |
c5aa993b | 63 | error ("Usage: gdbserver tty prog [args ...]"); |
c906108c | 64 | |
4ce44c66 JM |
65 | initialize_low (); |
66 | ||
c906108c SS |
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 | ||
c5aa993b JM |
76 | restart: |
77 | setjmp (toplevel); | |
c906108c SS |
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 | |
109 | without compatibility headaches. */ | |
110 | own_buf[0] = '\0'; | |
111 | break; | |
112 | } | |
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); | |
124 | 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 | |
132 | 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 | |
c5aa993b | 160 | debugging session. The traditional protocol will |
c906108c SS |
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 | |
c5aa993b | 185 | extended protocol. */ |
c906108c SS |
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 | |
c5aa993b JM |
207 | empty packet so that gdb knows that we don't support this |
208 | request. */ | |
c906108c SS |
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 | ||
c5aa993b JM |
244 | For the extended remote protocol we exit (and this is the only |
245 | way we gracefully exit!). | |
c906108c | 246 | |
c5aa993b JM |
247 | For the traditional remote protocol close the connection, |
248 | and re-open it at the top of the loop. */ | |
c906108c SS |
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 | } |