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c906108c SS |
1 | /* run front end support for arm |
2 | Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of ARM SIM. | |
5 | ||
6 | GNU CC 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, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC 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, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | /* This file provides the interface between the simulator and run.c and gdb | |
21 | (when the simulator is linked with gdb). | |
22 | All simulator interaction should go through this file. */ | |
23 | ||
24 | #include <stdio.h> | |
25 | #include <stdarg.h> | |
26 | #include <bfd.h> | |
27 | #include <signal.h> | |
28 | #include "callback.h" | |
29 | #include "remote-sim.h" | |
30 | #include "armdefs.h" | |
31 | #include "armemu.h" | |
32 | #include "dbg_rdi.h" | |
33 | ||
34 | host_callback *sim_callback; | |
35 | ||
36 | static struct ARMul_State *state; | |
37 | ||
38 | /* Who is using the simulator. */ | |
39 | static SIM_OPEN_KIND sim_kind; | |
40 | ||
41 | /* argv[0] */ | |
42 | static char *myname; | |
43 | ||
44 | /* Memory size in bytes. */ | |
45 | static int mem_size = (1 << 21); | |
46 | ||
47 | /* Non-zero to display start up banner, and maybe other things. */ | |
48 | static int verbosity; | |
49 | ||
50 | /* Non-zero to set big endian mode. */ | |
51 | static int big_endian; | |
52 | ||
7a292a7a SS |
53 | int stop_simulator; |
54 | ||
c906108c SS |
55 | static void |
56 | init () | |
57 | { | |
58 | static int done; | |
59 | ||
60 | if (!done) | |
61 | { | |
62 | ARMul_EmulateInit(); | |
63 | state = ARMul_NewState (); | |
64 | state->bigendSig = (big_endian ? HIGH : LOW); | |
65 | ARMul_MemoryInit(state, mem_size); | |
66 | ARMul_OSInit(state); | |
67 | ARMul_CoProInit(state); | |
68 | state->verbose = verbosity; | |
69 | done = 1; | |
70 | } | |
71 | } | |
72 | ||
73 | /* Set verbosity level of simulator. | |
74 | This is not intended to produce detailed tracing or debugging information. | |
75 | Just summaries. */ | |
76 | /* FIXME: common/run.c doesn't do this yet. */ | |
77 | ||
78 | void | |
79 | sim_set_verbose (v) | |
80 | int v; | |
81 | { | |
82 | verbosity = v; | |
83 | } | |
84 | ||
85 | /* Set the memory size to SIZE bytes. | |
86 | Must be called before initializing simulator. */ | |
87 | /* FIXME: Rename to sim_set_mem_size. */ | |
88 | ||
89 | void | |
90 | sim_size (size) | |
91 | int size; | |
92 | { | |
93 | mem_size = size; | |
94 | } | |
95 | ||
96 | void | |
97 | ARMul_ConsolePrint (ARMul_State * state, const char *format,...) | |
98 | { | |
99 | va_list ap; | |
100 | ||
101 | if (state->verbose) | |
102 | { | |
103 | va_start (ap, format); | |
104 | vprintf (format, ap); | |
105 | va_end (ap); | |
106 | } | |
107 | } | |
108 | ||
109 | ARMword | |
110 | ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr) | |
111 | { | |
112 | ||
113 | } | |
114 | ||
115 | int | |
116 | sim_write (sd, addr, buffer, size) | |
117 | SIM_DESC sd; | |
118 | SIM_ADDR addr; | |
119 | unsigned char *buffer; | |
120 | int size; | |
121 | { | |
122 | int i; | |
123 | init (); | |
124 | for (i = 0; i < size; i++) | |
125 | { | |
126 | ARMul_WriteByte (state, addr+i, buffer[i]); | |
127 | } | |
128 | return size; | |
129 | } | |
130 | ||
131 | int | |
132 | sim_read (sd, addr, buffer, size) | |
133 | SIM_DESC sd; | |
134 | SIM_ADDR addr; | |
135 | unsigned char *buffer; | |
136 | int size; | |
137 | { | |
138 | int i; | |
139 | init (); | |
140 | for (i = 0; i < size; i++) | |
141 | { | |
142 | buffer[i] = ARMul_ReadByte (state, addr + i); | |
143 | } | |
144 | return size; | |
145 | } | |
146 | ||
147 | int | |
148 | sim_trace (sd) | |
149 | SIM_DESC sd; | |
150 | { | |
151 | (*sim_callback->printf_filtered) (sim_callback, "This simulator does not support tracing\n"); | |
152 | return 1; | |
153 | } | |
154 | ||
155 | int | |
156 | sim_stop (sd) | |
157 | SIM_DESC sd; | |
158 | { | |
7a292a7a SS |
159 | state->Emulate = STOP; |
160 | stop_simulator = 1; | |
161 | return 1; | |
c906108c SS |
162 | } |
163 | ||
164 | void | |
165 | sim_resume (sd, step, siggnal) | |
166 | SIM_DESC sd; | |
167 | int step, siggnal; | |
168 | { | |
169 | state->EndCondition = 0; | |
7a292a7a | 170 | stop_simulator = 0; |
c906108c SS |
171 | |
172 | if (step) | |
173 | { | |
174 | state->Reg[15] = ARMul_DoInstr (state); | |
175 | if (state->EndCondition == 0) | |
176 | state->EndCondition = RDIError_BreakpointReached; | |
177 | } | |
178 | else | |
179 | { | |
180 | #if 1 /* JGS */ | |
181 | state->NextInstr = RESUME; /* treat as PC change */ | |
182 | #endif | |
183 | state->Reg[15] = ARMul_DoProg (state); | |
184 | } | |
185 | ||
186 | FLUSHPIPE; | |
187 | } | |
188 | ||
189 | SIM_RC | |
190 | sim_create_inferior (sd, abfd, argv, env) | |
191 | SIM_DESC sd; | |
192 | struct _bfd *abfd; | |
193 | char **argv; | |
194 | char **env; | |
195 | { | |
196 | int argvlen=0; | |
197 | char **arg; | |
198 | ||
199 | if (abfd != NULL) | |
200 | ARMul_SetPC (state, bfd_get_start_address (abfd)); | |
201 | else | |
202 | ARMul_SetPC (state, 0); /* ??? */ | |
203 | ||
204 | #if 1 /* JGS */ | |
205 | /* We explicitly select a processor capable of supporting the ARM | |
206 | 32bit mode, and then we force the simulated CPU into the 32bit | |
207 | User mode: */ | |
208 | ARMul_SelectProcessor(state, ARM600); | |
209 | ARMul_SetCPSR(state, USER32MODE); | |
210 | #endif | |
211 | ||
212 | if (argv != NULL) | |
213 | { | |
214 | /* | |
215 | ** Set up the command line (by laboriously stringing together the | |
216 | ** environment carefully picked apart by our caller...) | |
217 | */ | |
218 | /* Free any old stuff */ | |
219 | if (state->CommandLine != NULL) | |
220 | { | |
221 | free(state->CommandLine); | |
222 | state->CommandLine = NULL; | |
223 | } | |
224 | ||
225 | /* See how much we need */ | |
226 | for (arg = argv; *arg != NULL; arg++) | |
227 | argvlen += strlen(*arg)+1; | |
228 | ||
229 | /* allocate it... */ | |
230 | state->CommandLine = malloc(argvlen+1); | |
231 | if (state->CommandLine != NULL) | |
232 | { | |
233 | arg = argv; | |
234 | state->CommandLine[0]='\0'; | |
235 | for (arg = argv; *arg != NULL; arg++) | |
236 | { | |
237 | strcat(state->CommandLine, *arg); | |
238 | strcat(state->CommandLine, " "); | |
239 | } | |
240 | } | |
241 | } | |
242 | ||
243 | if (env != NULL) | |
244 | { | |
245 | /* Now see if there's a MEMSIZE spec in the environment */ | |
246 | while (*env) | |
247 | { | |
248 | if (strncmp(*env, "MEMSIZE=", sizeof("MEMSIZE=")-1)==0) | |
249 | { | |
250 | unsigned long top_of_memory; | |
251 | char *end_of_num; | |
252 | ||
253 | /* Set up memory limit */ | |
254 | state->MemSize = strtoul(*env + sizeof("MEMSIZE=")-1, &end_of_num, 0); | |
255 | } | |
256 | env++; | |
257 | } | |
258 | } | |
259 | ||
260 | return SIM_RC_OK; | |
261 | } | |
262 | ||
263 | void | |
264 | sim_info (sd, verbose) | |
265 | SIM_DESC sd; | |
266 | int verbose; | |
267 | { | |
268 | } | |
269 | ||
270 | ||
271 | static int | |
272 | frommem (state, memory) | |
273 | struct ARMul_State *state; | |
274 | unsigned char *memory; | |
275 | { | |
276 | if (state->bigendSig == HIGH) | |
277 | { | |
278 | return (memory[0] << 24) | |
279 | | (memory[1] << 16) | |
280 | | (memory[2] << 8) | |
281 | | (memory[3] << 0); | |
282 | } | |
283 | else | |
284 | { | |
285 | return (memory[3] << 24) | |
286 | | (memory[2] << 16) | |
287 | | (memory[1] << 8) | |
288 | | (memory[0] << 0); | |
289 | } | |
290 | } | |
291 | ||
292 | ||
293 | static void | |
294 | tomem (state, memory, val) | |
295 | struct ARMul_State *state; | |
296 | unsigned char *memory; | |
297 | int val; | |
298 | { | |
299 | if (state->bigendSig == HIGH) | |
300 | { | |
301 | memory[0] = val >> 24; | |
302 | memory[1] = val >> 16; | |
303 | memory[2] = val >> 8; | |
304 | memory[3] = val >> 0; | |
305 | } | |
306 | else | |
307 | { | |
308 | memory[3] = val >> 24; | |
309 | memory[2] = val >> 16; | |
310 | memory[1] = val >> 8; | |
311 | memory[0] = val >> 0; | |
312 | } | |
313 | } | |
314 | ||
315 | int | |
316 | sim_store_register (sd, rn, memory, length) | |
317 | SIM_DESC sd; | |
318 | int rn; | |
319 | unsigned char *memory; | |
320 | int length; | |
321 | { | |
322 | init (); | |
323 | ARMul_SetReg(state, state->Mode, rn, frommem (state, memory)); | |
324 | return -1; | |
325 | } | |
326 | ||
327 | int | |
328 | sim_fetch_register (sd, rn, memory, length) | |
329 | SIM_DESC sd; | |
330 | int rn; | |
331 | unsigned char *memory; | |
332 | int length; | |
333 | { | |
334 | ARMword regval; | |
335 | ||
336 | init (); | |
337 | if (rn < 16) | |
338 | regval = ARMul_GetReg(state, state->Mode, rn); | |
339 | else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */ | |
340 | regval = ARMul_GetCPSR(state); | |
341 | else | |
342 | regval = 0; /* FIXME: should report an error */ | |
343 | tomem (state, memory, regval); | |
344 | return -1; | |
345 | } | |
346 | ||
347 | SIM_DESC | |
348 | sim_open (kind, ptr, abfd, argv) | |
349 | SIM_OPEN_KIND kind; | |
350 | host_callback *ptr; | |
351 | struct _bfd *abfd; | |
352 | char **argv; | |
353 | { | |
354 | sim_kind = kind; | |
355 | myname = argv[0]; | |
356 | sim_callback = ptr; | |
357 | ||
358 | /* Decide upon the endian-ness of the processor. | |
359 | If we can, get the information from the bfd itself. | |
360 | Otherwise look to see if we have been given a command | |
361 | line switch that tells us. Otherwise default to little endian. */ | |
362 | if (abfd != NULL) | |
363 | big_endian = bfd_big_endian (abfd); | |
364 | else if (argv[1] != NULL) | |
365 | { | |
366 | int i; | |
367 | ||
368 | /* Scan for endian-ness switch. */ | |
369 | for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++) | |
370 | if (argv[i][0] == '-' && argv[i][1] == 'E') | |
371 | { | |
372 | char c; | |
373 | ||
374 | if ((c = argv[i][2]) == 0) | |
375 | { | |
376 | ++i; | |
377 | c = argv[i][0]; | |
378 | } | |
379 | ||
380 | switch (c) | |
381 | { | |
382 | case 0: | |
383 | sim_callback->printf_filtered | |
384 | (sim_callback, "No argument to -E option provided\n"); | |
385 | break; | |
386 | ||
387 | case 'b': | |
388 | case 'B': | |
389 | big_endian = 1; | |
390 | break; | |
391 | ||
392 | case 'l': | |
393 | case 'L': | |
394 | big_endian = 0; | |
395 | break; | |
396 | ||
397 | default: | |
398 | sim_callback->printf_filtered | |
399 | (sim_callback, "Unrecognised argument to -E option\n"); | |
400 | break; | |
401 | } | |
402 | } | |
403 | } | |
404 | ||
405 | return (SIM_DESC) 1; | |
406 | } | |
407 | ||
408 | void | |
409 | sim_close (sd, quitting) | |
410 | SIM_DESC sd; | |
411 | int quitting; | |
412 | { | |
413 | /* nothing to do */ | |
414 | } | |
415 | ||
416 | SIM_RC | |
417 | sim_load (sd, prog, abfd, from_tty) | |
418 | SIM_DESC sd; | |
419 | char *prog; | |
420 | bfd *abfd; | |
421 | int from_tty; | |
422 | { | |
423 | extern bfd *sim_load_file (); /* ??? Don't know where this should live. */ | |
424 | bfd *prog_bfd; | |
425 | ||
426 | prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd, | |
427 | sim_kind == SIM_OPEN_DEBUG, | |
428 | 0, sim_write); | |
429 | if (prog_bfd == NULL) | |
430 | return SIM_RC_FAIL; | |
431 | ARMul_SetPC (state, bfd_get_start_address (prog_bfd)); | |
432 | if (abfd == NULL) | |
433 | bfd_close (prog_bfd); | |
434 | return SIM_RC_OK; | |
435 | } | |
436 | ||
437 | void | |
438 | sim_stop_reason (sd, reason, sigrc) | |
439 | SIM_DESC sd; | |
440 | enum sim_stop *reason; | |
441 | int *sigrc; | |
442 | { | |
7a292a7a SS |
443 | if (stop_simulator) |
444 | { | |
445 | *reason = sim_stopped; | |
446 | *sigrc = SIGINT; | |
447 | } | |
448 | else if (state->EndCondition == 0) | |
c906108c SS |
449 | { |
450 | *reason = sim_exited; | |
451 | *sigrc = state->Reg[0] & 255; | |
452 | } | |
453 | else | |
454 | { | |
455 | *reason = sim_stopped; | |
456 | if (state->EndCondition == RDIError_BreakpointReached) | |
457 | *sigrc = SIGTRAP; | |
458 | else | |
459 | *sigrc = 0; | |
460 | } | |
461 | } | |
462 | ||
463 | void | |
464 | sim_do_command (sd, cmd) | |
465 | SIM_DESC sd; | |
466 | char *cmd; | |
467 | { | |
468 | (*sim_callback->printf_filtered) (sim_callback, "This simulator does not accept any commands.\n"); | |
469 | } | |
470 | ||
471 | ||
472 | void | |
473 | sim_set_callbacks (ptr) | |
474 | host_callback *ptr; | |
475 | { | |
476 | sim_callback = ptr; | |
477 | } |