Commit | Line | Data |
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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 | |
da85418c | 32 | start_inferior (char *argv[], char *statusptr) |
c906108c SS |
33 | { |
34 | inferior_pid = create_inferior (argv[0], argv); | |
35 | fprintf (stderr, "Process %s created; pid = %d\n", argv[0], inferior_pid); | |
36 | ||
37 | /* Wait till we are at 1st instruction in program, return signal number. */ | |
38 | return mywait (statusptr); | |
39 | } | |
40 | ||
41 | extern int remote_debug; | |
42 | ||
43 | int | |
da85418c | 44 | main (int argc, char *argv[]) |
c906108c | 45 | { |
5c44784c | 46 | char ch, status, own_buf[PBUFSIZ], mem_buf[2000]; |
c906108c SS |
47 | int i = 0; |
48 | unsigned char signal; | |
49 | unsigned int len; | |
50 | CORE_ADDR mem_addr; | |
51 | ||
c5aa993b | 52 | if (setjmp (toplevel)) |
c906108c | 53 | { |
c5aa993b JM |
54 | fprintf (stderr, "Exiting\n"); |
55 | exit (1); | |
c906108c SS |
56 | } |
57 | ||
58 | if (argc < 3) | |
c5aa993b | 59 | error ("Usage: gdbserver tty prog [args ...]"); |
c906108c | 60 | |
4ce44c66 JM |
61 | initialize_low (); |
62 | ||
c906108c SS |
63 | /* Wait till we are at first instruction in program. */ |
64 | signal = start_inferior (&argv[2], &status); | |
65 | ||
66 | /* We are now stopped at the first instruction of the target process */ | |
67 | ||
68 | while (1) | |
69 | { | |
70 | remote_open (argv[1]); | |
71 | ||
c5aa993b JM |
72 | restart: |
73 | setjmp (toplevel); | |
c906108c SS |
74 | while (getpkt (own_buf) > 0) |
75 | { | |
76 | unsigned char sig; | |
77 | i = 0; | |
78 | ch = own_buf[i++]; | |
79 | switch (ch) | |
80 | { | |
81 | case 'd': | |
82 | remote_debug = !remote_debug; | |
83 | break; | |
84 | case '!': | |
85 | extended_protocol = 1; | |
86 | prepare_resume_reply (own_buf, status, signal); | |
87 | break; | |
88 | case '?': | |
89 | prepare_resume_reply (own_buf, status, signal); | |
90 | break; | |
91 | case 'H': | |
92 | switch (own_buf[1]) | |
93 | { | |
94 | case 'g': | |
95 | general_thread = strtol (&own_buf[2], NULL, 16); | |
96 | write_ok (own_buf); | |
97 | fetch_inferior_registers (0); | |
98 | break; | |
99 | case 'c': | |
100 | cont_thread = strtol (&own_buf[2], NULL, 16); | |
101 | write_ok (own_buf); | |
102 | break; | |
103 | default: | |
104 | /* Silently ignore it so that gdb can extend the protocol | |
105 | without compatibility headaches. */ | |
106 | own_buf[0] = '\0'; | |
107 | break; | |
108 | } | |
109 | break; | |
110 | case 'g': | |
111 | convert_int_to_ascii (registers, own_buf, REGISTER_BYTES); | |
112 | break; | |
113 | case 'G': | |
114 | convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES); | |
115 | store_inferior_registers (-1); | |
116 | write_ok (own_buf); | |
117 | break; | |
118 | case 'm': | |
119 | decode_m_packet (&own_buf[1], &mem_addr, &len); | |
120 | read_inferior_memory (mem_addr, mem_buf, len); | |
121 | convert_int_to_ascii (mem_buf, own_buf, len); | |
122 | break; | |
123 | case 'M': | |
124 | decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); | |
125 | if (write_inferior_memory (mem_addr, mem_buf, len) == 0) | |
126 | write_ok (own_buf); | |
127 | else | |
128 | write_enn (own_buf); | |
129 | break; | |
130 | case 'C': | |
131 | convert_ascii_to_int (own_buf + 1, &sig, 1); | |
132 | myresume (0, sig); | |
133 | signal = mywait (&status); | |
134 | prepare_resume_reply (own_buf, status, signal); | |
135 | break; | |
136 | case 'S': | |
137 | convert_ascii_to_int (own_buf + 1, &sig, 1); | |
138 | myresume (1, sig); | |
139 | signal = mywait (&status); | |
140 | prepare_resume_reply (own_buf, status, signal); | |
141 | break; | |
142 | case 'c': | |
143 | myresume (0, 0); | |
144 | signal = mywait (&status); | |
145 | prepare_resume_reply (own_buf, status, signal); | |
146 | break; | |
147 | case 's': | |
148 | myresume (1, 0); | |
149 | signal = mywait (&status); | |
150 | prepare_resume_reply (own_buf, status, signal); | |
151 | break; | |
152 | case 'k': | |
153 | fprintf (stderr, "Killing inferior\n"); | |
154 | kill_inferior (); | |
155 | /* When using the extended protocol, we start up a new | |
c5aa993b | 156 | debugging session. The traditional protocol will |
c906108c SS |
157 | exit instead. */ |
158 | if (extended_protocol) | |
159 | { | |
160 | write_ok (own_buf); | |
161 | fprintf (stderr, "GDBserver restarting\n"); | |
162 | ||
163 | /* Wait till we are at 1st instruction in prog. */ | |
164 | signal = start_inferior (&argv[2], &status); | |
165 | goto restart; | |
166 | break; | |
167 | } | |
168 | else | |
169 | { | |
170 | exit (0); | |
171 | break; | |
172 | } | |
173 | case 'T': | |
174 | if (mythread_alive (strtol (&own_buf[1], NULL, 16))) | |
175 | write_ok (own_buf); | |
176 | else | |
177 | write_enn (own_buf); | |
178 | break; | |
179 | case 'R': | |
180 | /* Restarting the inferior is only supported in the | |
c5aa993b | 181 | extended protocol. */ |
c906108c SS |
182 | if (extended_protocol) |
183 | { | |
184 | kill_inferior (); | |
185 | write_ok (own_buf); | |
186 | fprintf (stderr, "GDBserver restarting\n"); | |
187 | ||
188 | /* Wait till we are at 1st instruction in prog. */ | |
189 | signal = start_inferior (&argv[2], &status); | |
190 | goto restart; | |
191 | break; | |
192 | } | |
193 | else | |
194 | { | |
195 | /* It is a request we don't understand. Respond with an | |
196 | empty packet so that gdb knows that we don't support this | |
197 | request. */ | |
198 | own_buf[0] = '\0'; | |
199 | break; | |
200 | } | |
201 | default: | |
202 | /* It is a request we don't understand. Respond with an | |
c5aa993b JM |
203 | empty packet so that gdb knows that we don't support this |
204 | request. */ | |
c906108c SS |
205 | own_buf[0] = '\0'; |
206 | break; | |
207 | } | |
208 | ||
209 | putpkt (own_buf); | |
210 | ||
211 | if (status == 'W') | |
212 | fprintf (stderr, | |
213 | "\nChild exited with status %d\n", sig); | |
214 | if (status == 'X') | |
215 | fprintf (stderr, "\nChild terminated with signal = 0x%x\n", sig); | |
216 | if (status == 'W' || status == 'X') | |
217 | { | |
218 | if (extended_protocol) | |
219 | { | |
220 | fprintf (stderr, "Killing inferior\n"); | |
221 | kill_inferior (); | |
222 | write_ok (own_buf); | |
223 | fprintf (stderr, "GDBserver restarting\n"); | |
224 | ||
225 | /* Wait till we are at 1st instruction in prog. */ | |
226 | signal = start_inferior (&argv[2], &status); | |
227 | goto restart; | |
228 | break; | |
229 | } | |
230 | else | |
231 | { | |
232 | fprintf (stderr, "GDBserver exiting\n"); | |
233 | exit (0); | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | /* We come here when getpkt fails. | |
239 | ||
c5aa993b JM |
240 | For the extended remote protocol we exit (and this is the only |
241 | way we gracefully exit!). | |
c906108c | 242 | |
c5aa993b JM |
243 | For the traditional remote protocol close the connection, |
244 | and re-open it at the top of the loop. */ | |
c906108c SS |
245 | if (extended_protocol) |
246 | { | |
247 | remote_close (); | |
248 | exit (0); | |
249 | } | |
250 | else | |
251 | { | |
252 | fprintf (stderr, "Remote side has terminated connection. GDBserver will reopen the connection.\n"); | |
253 | ||
254 | remote_close (); | |
255 | } | |
256 | } | |
257 | } |