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c906108c SS |
1 | /* This file is part of the program psim. |
2 | ||
3 | Copyright (C) 1994-1996,1998, Andrew Cagney <cagney@highland.com.au> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | */ | |
20 | ||
21 | ||
22 | #include <signal.h> /* FIXME - should be machine dependant version */ | |
23 | #include <stdarg.h> | |
24 | #include <ctype.h> | |
25 | ||
26 | #include "psim.h" | |
27 | #include "options.h" | |
28 | ||
29 | #undef printf_filtered /* blow away the mapping */ | |
30 | ||
31 | #ifdef HAVE_STDLIB_H | |
32 | #include <stdlib.h> | |
33 | #endif | |
34 | ||
35 | #ifdef HAVE_STRING_H | |
36 | #include <string.h> | |
37 | #else | |
38 | #ifdef HAVE_STRINGS_H | |
39 | #include <strings.h> | |
40 | #endif | |
41 | #endif | |
42 | ||
43 | #include "defs.h" | |
44 | #include "bfd.h" | |
3c25f8c7 AC |
45 | #include "gdb/callback.h" |
46 | #include "gdb/remote-sim.h" | |
c906108c | 47 | |
7a292a7a SS |
48 | /* Define the rate at which the simulator should poll the host |
49 | for a quit. */ | |
50 | #ifndef POLL_QUIT_INTERVAL | |
51 | #define POLL_QUIT_INTERVAL 0x20 | |
52 | #endif | |
53 | ||
54 | static int poll_quit_count = POLL_QUIT_INTERVAL; | |
c906108c SS |
55 | |
56 | /* Structures used by the simulator, for gdb just have static structures */ | |
57 | ||
58 | static psim *simulator; | |
59 | static device *root_device; | |
60 | static host_callback *callbacks; | |
61 | ||
7c721b2a MC |
62 | /* We use GDB's gdbarch_register_name function to map GDB register |
63 | numbers onto names, which we can then look up in the register | |
64 | table. Since the `set architecture' command can select a new | |
65 | processor variant at run-time, the meanings of the register numbers | |
66 | can change, so we need to make sure the sim uses the same | |
67 | name/number mapping that GDB uses. | |
68 | ||
69 | (We don't use the REGISTER_NAME macro, which is a wrapper for | |
70 | gdbarch_register_name. We #include GDB's "defs.h", which tries to | |
71 | #include GDB's "config.h", but gets ours instead, and REGISTER_NAME | |
72 | ends up not getting defined. Simpler to just use | |
73 | gdbarch_register_name directly.) | |
74 | ||
75 | We used to just use the REGISTER_NAMES macro from GDB's | |
76 | target-dependent header files, which expanded into an initializer | |
77 | for an array of strings. That was kind of nice, because it meant | |
78 | that libsim.a had only a compile-time dependency on GDB; using | |
79 | gdbarch_register_name directly means that there are now link-time | |
80 | and run-time dependencies too. | |
81 | ||
82 | Perhaps the host_callback structure could provide a function for | |
83 | retrieving register names; that would be cleaner. */ | |
c906108c SS |
84 | |
85 | SIM_DESC | |
86 | sim_open (SIM_OPEN_KIND kind, | |
87 | host_callback *callback, | |
6b4a8935 | 88 | struct bfd *abfd, |
c906108c SS |
89 | char **argv) |
90 | { | |
91 | callbacks = callback; | |
92 | ||
93 | /* Note: The simulation is not created by sim_open() because | |
94 | complete information is not yet available */ | |
95 | /* trace the call */ | |
96 | TRACE(trace_gdb, ("sim_open called\n")); | |
97 | ||
98 | if (root_device != NULL) | |
99 | sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n"); | |
100 | root_device = psim_tree(); | |
101 | simulator = NULL; | |
102 | ||
103 | psim_options(root_device, argv + 1); | |
104 | ||
105 | if (ppc_trace[trace_opts]) | |
106 | print_options (); | |
107 | ||
108 | /* fudge our descriptor for now */ | |
109 | return (SIM_DESC) 1; | |
110 | } | |
111 | ||
112 | ||
113 | void | |
114 | sim_close (SIM_DESC sd, int quitting) | |
115 | { | |
116 | TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting)); | |
117 | if (ppc_trace[trace_print_info] && simulator != NULL) | |
118 | psim_print_info (simulator, ppc_trace[trace_print_info]); | |
119 | } | |
120 | ||
121 | ||
122 | SIM_RC | |
123 | sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty) | |
124 | { | |
125 | TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n", | |
126 | prog, from_tty)); | |
127 | ASSERT(prog != NULL); | |
128 | ||
129 | /* create the simulator */ | |
130 | TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n")); | |
131 | simulator = psim_create(prog, root_device); | |
132 | ||
133 | /* bring in all the data section */ | |
134 | psim_init(simulator); | |
135 | ||
136 | /* get the start address */ | |
137 | if (abfd == NULL) | |
138 | { | |
139 | abfd = bfd_openr (prog, 0); | |
140 | if (abfd == NULL) | |
141 | error ("psim: can't open \"%s\": %s\n", | |
142 | prog, bfd_errmsg (bfd_get_error ())); | |
143 | if (!bfd_check_format (abfd, bfd_object)) | |
144 | { | |
145 | const char *errmsg = bfd_errmsg (bfd_get_error ()); | |
146 | bfd_close (abfd); | |
147 | error ("psim: \"%s\" is not an object file: %s\n", | |
148 | prog, errmsg); | |
149 | } | |
150 | bfd_close (abfd); | |
151 | } | |
152 | ||
153 | return SIM_RC_OK; | |
154 | } | |
155 | ||
156 | ||
157 | int | |
158 | sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
159 | { | |
160 | int result = psim_read_memory(simulator, MAX_NR_PROCESSORS, | |
161 | buf, mem, length); | |
162 | TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n", | |
163 | (long)mem, (long)buf, length, result)); | |
164 | return result; | |
165 | } | |
166 | ||
167 | ||
168 | int | |
169 | sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
170 | { | |
171 | int result = psim_write_memory(simulator, MAX_NR_PROCESSORS, | |
172 | buf, mem, length, | |
173 | 1/*violate_ro*/); | |
174 | TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n", | |
175 | (long)mem, (long)buf, length, result)); | |
176 | return result; | |
177 | } | |
178 | ||
179 | ||
180 | int | |
181 | sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
182 | { | |
183 | char *regname; | |
184 | ||
185 | if (simulator == NULL) { | |
186 | return 0; | |
187 | } | |
188 | ||
189 | /* GDB will sometimes ask for the contents of a register named ""; | |
7c721b2a MC |
190 | we ignore such requests, and leave garbage in *BUF. In GDB |
191 | terms, the empty string means "the register with this number is | |
192 | not present in the currently selected architecture variant." | |
193 | That's following the kludge we're using for the MIPS processors. | |
194 | But there are loops that just walk through the entire list of | |
195 | names and try to get everything. */ | |
196 | regname = gdbarch_register_name (current_gdbarch, regno); | |
d395ade3 EZ |
197 | /* FIXME: ezannoni 2002/04/15 Remove the 'vr' and 'vscr' check |
198 | once AltiVec support is committed. */ | |
199 | if (! regname || regname[0] == '\0' | |
200 | || (regname[0] == 'v' && regname[1] == 'r') | |
201 | || (strcmp (regname, "vscr") == 0)) | |
c906108c SS |
202 | return -1; |
203 | ||
204 | TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n", | |
205 | regno, regname, (long)buf)); | |
206 | psim_read_register(simulator, MAX_NR_PROCESSORS, | |
207 | buf, regname, raw_transfer); | |
208 | return -1; | |
209 | } | |
210 | ||
211 | ||
212 | int | |
213 | sim_store_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
214 | { | |
215 | char *regname; | |
216 | ||
217 | if (simulator == NULL) | |
218 | return 0; | |
219 | ||
220 | /* See comments in sim_fetch_register, above. */ | |
7c721b2a | 221 | regname = gdbarch_register_name (current_gdbarch, regno); |
d395ade3 EZ |
222 | /* FIXME: ezannoni 2002/04/15 Remove the 'vr' and 'vscr' check |
223 | once AltiVec support is committed. */ | |
224 | if (! regname || regname[0] == '\0' | |
225 | || (regname[0] == 'v' && regname[1] == 'r') | |
226 | || (strcmp (regname, "vscr") == 0)) | |
c906108c SS |
227 | return -1; |
228 | ||
229 | TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n", | |
230 | regno, regname, (long)buf)); | |
231 | psim_write_register(simulator, MAX_NR_PROCESSORS, | |
232 | buf, regname, raw_transfer); | |
233 | return -1; | |
234 | } | |
235 | ||
236 | ||
237 | void | |
238 | sim_info (SIM_DESC sd, int verbose) | |
239 | { | |
240 | TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose)); | |
241 | psim_print_info (simulator, verbose); | |
242 | } | |
243 | ||
244 | ||
245 | SIM_RC | |
246 | sim_create_inferior (SIM_DESC sd, | |
6b4a8935 | 247 | struct bfd *abfd, |
c906108c SS |
248 | char **argv, |
249 | char **envp) | |
250 | { | |
251 | unsigned_word entry_point; | |
252 | TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n", | |
253 | entry_point)); | |
254 | ||
255 | if (simulator == NULL) | |
256 | error ("No program loaded"); | |
257 | ||
258 | if (abfd != NULL) | |
259 | entry_point = bfd_get_start_address (abfd); | |
260 | else | |
261 | entry_point = 0xfff00000; /* ??? */ | |
262 | ||
263 | psim_init(simulator); | |
264 | psim_stack(simulator, argv, envp); | |
265 | ||
266 | psim_write_register(simulator, -1 /* all start at same PC */, | |
267 | &entry_point, "pc", cooked_transfer); | |
268 | return SIM_RC_OK; | |
269 | } | |
270 | ||
271 | ||
272 | void | |
273 | sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc) | |
274 | { | |
275 | psim_status status = psim_get_status(simulator); | |
276 | ||
277 | switch (status.reason) { | |
278 | case was_continuing: | |
279 | *reason = sim_stopped; | |
280 | if (status.signal == 0) | |
281 | *sigrc = SIGTRAP; | |
282 | else | |
283 | *sigrc = status.signal; | |
284 | break; | |
285 | case was_trap: | |
286 | *reason = sim_stopped; | |
287 | *sigrc = SIGTRAP; | |
288 | break; | |
289 | case was_exited: | |
290 | *reason = sim_exited; | |
291 | *sigrc = status.signal; | |
292 | break; | |
293 | case was_signalled: | |
294 | *reason = sim_signalled; | |
295 | *sigrc = status.signal; | |
296 | break; | |
297 | } | |
298 | ||
299 | TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n", | |
300 | (long)reason, (long)*reason, (long)sigrc, (long)*sigrc)); | |
301 | } | |
302 | ||
303 | ||
304 | ||
305 | /* Run (or resume) the program. */ | |
306 | ||
307 | int | |
308 | sim_stop (SIM_DESC sd) | |
309 | { | |
310 | psim_stop (simulator); | |
311 | return 1; | |
312 | } | |
313 | ||
314 | void | |
315 | sim_resume (SIM_DESC sd, int step, int siggnal) | |
316 | { | |
317 | TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n", | |
318 | step, siggnal)); | |
319 | ||
320 | if (step) | |
321 | { | |
322 | psim_step (simulator); | |
323 | } | |
324 | else | |
325 | { | |
326 | psim_run (simulator); | |
327 | } | |
328 | } | |
329 | ||
330 | void | |
331 | sim_do_command (SIM_DESC sd, char *cmd) | |
332 | { | |
333 | TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", | |
334 | cmd ? cmd : "(null)")); | |
335 | if (cmd != NULL) { | |
336 | char **argv = buildargv(cmd); | |
337 | psim_command(root_device, argv); | |
338 | freeargv(argv); | |
339 | } | |
340 | } | |
341 | ||
342 | ||
343 | /* Polling, if required */ | |
344 | ||
345 | void | |
346 | sim_io_poll_quit (void) | |
347 | { | |
7a292a7a | 348 | if (callbacks->poll_quit != NULL && poll_quit_count-- < 0) |
c906108c | 349 | { |
7a292a7a | 350 | poll_quit_count = POLL_QUIT_INTERVAL; |
c906108c SS |
351 | if (callbacks->poll_quit (callbacks)) |
352 | psim_stop (simulator); | |
353 | } | |
354 | } | |
355 | ||
356 | ||
357 | ||
358 | /* Map simulator IO operations onto the corresponding GDB I/O | |
359 | functions. | |
360 | ||
361 | NB: Only a limited subset of operations are mapped across. More | |
362 | advanced operations (such as dup or write) must either be mapped to | |
363 | one of the below calls or handled internally */ | |
364 | ||
365 | int | |
366 | sim_io_read_stdin(char *buf, | |
367 | int sizeof_buf) | |
368 | { | |
369 | switch (CURRENT_STDIO) { | |
370 | case DO_USE_STDIO: | |
371 | return callbacks->read_stdin(callbacks, buf, sizeof_buf); | |
372 | break; | |
373 | case DONT_USE_STDIO: | |
374 | return callbacks->read(callbacks, 0, buf, sizeof_buf); | |
375 | break; | |
376 | default: | |
377 | error("sim_io_read_stdin: unaccounted switch\n"); | |
378 | break; | |
379 | } | |
380 | return 0; | |
381 | } | |
382 | ||
383 | int | |
384 | sim_io_write_stdout(const char *buf, | |
385 | int sizeof_buf) | |
386 | { | |
387 | switch (CURRENT_STDIO) { | |
388 | case DO_USE_STDIO: | |
389 | return callbacks->write_stdout(callbacks, buf, sizeof_buf); | |
390 | break; | |
391 | case DONT_USE_STDIO: | |
392 | return callbacks->write(callbacks, 1, buf, sizeof_buf); | |
393 | break; | |
394 | default: | |
395 | error("sim_io_write_stdout: unaccounted switch\n"); | |
396 | break; | |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
401 | int | |
402 | sim_io_write_stderr(const char *buf, | |
403 | int sizeof_buf) | |
404 | { | |
405 | switch (CURRENT_STDIO) { | |
406 | case DO_USE_STDIO: | |
407 | /* NB: I think there should be an explicit write_stderr callback */ | |
408 | return callbacks->write(callbacks, 3, buf, sizeof_buf); | |
409 | break; | |
410 | case DONT_USE_STDIO: | |
411 | return callbacks->write(callbacks, 3, buf, sizeof_buf); | |
412 | break; | |
413 | default: | |
414 | error("sim_io_write_stderr: unaccounted switch\n"); | |
415 | break; | |
416 | } | |
417 | return 0; | |
418 | } | |
419 | ||
420 | ||
421 | void | |
422 | sim_io_printf_filtered(const char *fmt, | |
423 | ...) | |
424 | { | |
425 | char message[1024]; | |
426 | va_list ap; | |
427 | /* format the message */ | |
428 | va_start(ap, fmt); | |
429 | vsprintf(message, fmt, ap); | |
430 | va_end(ap); | |
431 | /* sanity check */ | |
432 | if (strlen(message) >= sizeof(message)) | |
433 | error("sim_io_printf_filtered: buffer overflow\n"); | |
434 | callbacks->printf_filtered(callbacks, "%s", message); | |
435 | } | |
436 | ||
437 | void | |
438 | sim_io_flush_stdoutput(void) | |
439 | { | |
440 | switch (CURRENT_STDIO) { | |
441 | case DO_USE_STDIO: | |
442 | callbacks->flush_stdout (callbacks); | |
443 | break; | |
444 | case DONT_USE_STDIO: | |
445 | break; | |
446 | default: | |
447 | error("sim_io_read_stdin: unaccounted switch\n"); | |
448 | break; | |
449 | } | |
450 | } | |
451 | ||
de46f45f MG |
452 | void |
453 | sim_io_error (SIM_DESC sd, const char *fmt, ...) | |
454 | { | |
455 | va_list ap; | |
456 | va_start(ap, fmt); | |
457 | callbacks->evprintf_filtered (callbacks, fmt, ap); | |
458 | va_end(ap); | |
459 | callbacks->error (callbacks, ""); | |
460 | } | |
461 | ||
c906108c SS |
462 | /****/ |
463 | ||
464 | void * | |
465 | zalloc(long size) | |
466 | { | |
467 | void *memory = (void*)xmalloc(size); | |
468 | if (memory == NULL) | |
469 | error("xmalloc failed\n"); | |
470 | memset(memory, 0, size); | |
471 | return memory; | |
472 | } | |
473 | ||
474 | void zfree(void *data) | |
475 | { | |
476 | free(data); | |
477 | } |