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ec25d19b SC |
1 | /* Remote debugging interface for generalized simulator |
2 | Copyright 1992 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Steve Chamberlain | |
4 | (sac@cygnus.com). | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "wait.h" | |
25 | #include "value.h" | |
26 | #include <string.h> | |
27 | #include <ctype.h> | |
28 | #include <fcntl.h> | |
29 | #include <signal.h> | |
30 | #include <setjmp.h> | |
31 | #include <errno.h> | |
32 | #include "terminal.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
35 | ||
36 | /* Forward data declarations */ | |
37 | extern struct target_ops sim_ops; /* Forward declaration */ | |
38 | ||
39 | int | |
40 | sim_write_inferior_memory (memaddr, myaddr, len) | |
41 | CORE_ADDR memaddr; | |
42 | unsigned char *myaddr; | |
43 | int len; | |
44 | { | |
45 | return sim_write(memaddr, myaddr, len); | |
46 | } | |
47 | ||
48 | static int | |
49 | store_register(regno) | |
50 | int regno; | |
51 | { | |
52 | if (regno == -1) | |
53 | { | |
54 | for (regno = 0; regno < NUM_REGS; regno++) | |
55 | store_register(regno); | |
56 | } | |
57 | else | |
58 | { | |
59 | sim_store_register(regno, read_register(regno)); | |
60 | } | |
61 | return 0; | |
62 | } | |
63 | ||
64 | ||
65 | /* | |
66 | * Download a file specified in 'args', to the sim. | |
67 | */ | |
68 | static void | |
69 | sim_load(args,fromtty) | |
70 | char *args; | |
71 | int fromtty; | |
72 | { | |
73 | bfd *abfd; | |
74 | asection *s; | |
75 | ||
76 | inferior_pid = 0; | |
77 | abfd = bfd_openr(args, (char*)0); | |
78 | ||
79 | if (!abfd) | |
80 | { | |
81 | printf_filtered("Unable to open file %s\n", args); | |
82 | return; | |
83 | } | |
84 | ||
85 | if (bfd_check_format(abfd, bfd_object) ==0) | |
86 | { | |
87 | printf_filtered("File is not an object file\n"); | |
88 | return ; | |
89 | } | |
90 | ||
91 | s = abfd->sections; | |
92 | while (s != (asection *)NULL) | |
93 | { | |
94 | if (s->flags & SEC_LOAD) | |
95 | { | |
96 | int i; | |
97 | int delta = 4096; | |
98 | char *buffer = xmalloc(delta); | |
99 | printf_filtered("%s\t: 0x%4x .. 0x%4x ", | |
100 | s->name, s->vma, s->vma + s->_raw_size); | |
101 | for (i = 0; i < s->_raw_size; i+= delta) | |
102 | { | |
103 | int sub_delta = delta; | |
104 | if (sub_delta > s->_raw_size - i) | |
105 | sub_delta = s->_raw_size - i ; | |
106 | ||
107 | bfd_get_section_contents(abfd, s, buffer, i, sub_delta); | |
108 | sim_write_inferior_memory(s->vma + i, buffer, sub_delta); | |
109 | printf_filtered("*"); | |
110 | fflush(stdout); | |
111 | } | |
112 | printf_filtered( "\n"); | |
113 | free(buffer); | |
114 | } | |
115 | s = s->next; | |
116 | } | |
117 | ||
118 | sim_store_register(PC_REGNUM, abfd->start_address); | |
119 | } | |
120 | ||
121 | /* This is called not only when we first attach, but also when the | |
122 | user types "run" after having attached. */ | |
123 | void | |
124 | sim_create_inferior (execfile, args, env) | |
125 | char *execfile; | |
126 | char *args; | |
127 | char **env; | |
128 | { | |
129 | int entry_pt; | |
130 | ||
131 | if (args && *args) | |
132 | error ("Can't pass arguments to remote sim process."); | |
133 | ||
134 | if (execfile == 0 || exec_bfd == 0) | |
135 | error ("No exec file specified"); | |
136 | ||
137 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
138 | init_wait_for_inferior (); | |
139 | insert_breakpoints (); | |
140 | proceed(entry_pt, -1, 0); | |
141 | } | |
142 | ||
143 | ||
144 | ||
145 | static int | |
146 | sim_open (name, from_tty) | |
147 | char *name; | |
148 | int from_tty; | |
149 | { | |
150 | if(name == 0) | |
151 | { | |
152 | name = ""; | |
153 | } | |
154 | ||
155 | push_target (&sim_ops); | |
156 | target_fetch_registers(-1); | |
157 | printf_filtered("Connected to the simulator.\n"); | |
158 | } | |
159 | ||
160 | /* Close out all files and local state before this target loses control. */ | |
161 | ||
162 | static int | |
163 | sim_close (quitting) | |
164 | int quitting; | |
165 | { | |
166 | } | |
167 | ||
168 | /* Terminate the open connection to the remote debugger. | |
169 | Use this when you want to detach and do something else | |
170 | with your gdb. */ | |
171 | int | |
172 | sim_detach (args,from_tty) | |
173 | char *args; | |
174 | int from_tty; | |
175 | { | |
176 | pop_target(); /* calls sim_close to do the real work */ | |
177 | if (from_tty) | |
178 | printf_filtered ("Ending remote %s debugging\n", target_shortname); | |
179 | return 0; | |
180 | } | |
181 | ||
182 | /* Tell the remote machine to resume. */ | |
183 | ||
184 | ||
185 | /* Wait until the remote machine stops, then return, | |
186 | storing status in STATUS just as `wait' would. */ | |
187 | ||
188 | int | |
189 | sim_wait (status) | |
190 | WAITTYPE *status; | |
191 | { | |
192 | WSETSTOP(*status, sim_stop_signal()); | |
193 | return 0; | |
194 | } | |
195 | ||
196 | ||
197 | ||
198 | static void | |
199 | fetch_register(regno) | |
200 | int regno; | |
201 | { | |
202 | if (regno == -1) | |
203 | { | |
204 | for (regno = 0; regno < NUM_REGS; regno++) | |
205 | fetch_register(regno); | |
206 | } | |
207 | else | |
208 | { | |
209 | char buf[MAX_REGISTER_RAW_SIZE]; | |
210 | sim_fetch_register(regno, buf); | |
211 | supply_register(regno, buf); | |
212 | } | |
213 | } | |
214 | ||
215 | ||
216 | int | |
217 | sim_xfer_inferior_memory(memaddr, myaddr, len, write, target) | |
218 | CORE_ADDR memaddr; | |
219 | char *myaddr; | |
220 | int len; | |
221 | int write; | |
222 | struct target_ops *target; /* ignored */ | |
223 | { | |
224 | if (write) | |
225 | { | |
226 | sim_write(memaddr, myaddr, len); | |
227 | } | |
228 | else | |
229 | { | |
230 | sim_read(memaddr, myaddr, len); | |
231 | } | |
232 | return len; | |
233 | } | |
234 | ||
235 | ||
236 | /* This routine is run as a hook, just before the main command loop is | |
237 | entered. If gdb is configured for the H8, but has not had its | |
238 | target specified yet, this will loop prompting the user to do so. | |
239 | */ | |
240 | ||
241 | void | |
242 | sim_before_main_loop () | |
243 | { | |
244 | push_target (&sim_ops); | |
245 | } | |
246 | ||
247 | ||
248 | static int rem_resume(a,b) | |
249 | { | |
250 | sim_resume(a,b); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | pstore() | |
255 | { | |
256 | return 1; | |
257 | } | |
258 | /* Define the target subroutine names */ | |
259 | ||
260 | struct target_ops sim_ops = | |
261 | { | |
262 | "sim", "simulator", | |
263 | "Use the simulator", | |
264 | sim_open, sim_close, | |
265 | 0, sim_detach, rem_resume, sim_wait, /* attach */ | |
266 | fetch_register, store_register, | |
267 | pstore, | |
268 | sim_xfer_inferior_memory, | |
269 | 0, | |
270 | 0, 0, /* Breakpoints */ | |
271 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
272 | pstore, | |
273 | sim_load, | |
274 | 0, /* lookup_symbol */ | |
275 | sim_create_inferior, /* create_inferior */ | |
276 | pstore, /* mourn_inferior FIXME */ | |
277 | 0, /* can_run */ | |
278 | 0, /* notice_signals */ | |
279 | process_stratum, 0, /* next */ | |
280 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
281 | 0,0, /* Section pointers */ | |
282 | OPS_MAGIC, /* Always the last thing */ | |
283 | }; | |
284 | ||
285 | /***********************************************************************/ | |
286 | ||
287 | void | |
288 | _initialize_remote_sim () | |
289 | { | |
290 | add_target (&sim_ops); | |
291 | } | |
292 | ||
293 |