Commit | Line | Data |
---|---|---|
c906108c | 1 | /* run front end support for arm |
917bca4f | 2 | Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc. |
c906108c SS |
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> | |
6d358e86 | 26 | #include <string.h> |
c906108c SS |
27 | #include <bfd.h> |
28 | #include <signal.h> | |
29 | #include "callback.h" | |
30 | #include "remote-sim.h" | |
31 | #include "armdefs.h" | |
32 | #include "armemu.h" | |
33 | #include "dbg_rdi.h" | |
6d358e86 | 34 | #include "ansidecl.h" |
c906108c SS |
35 | |
36 | host_callback *sim_callback; | |
37 | ||
38 | static struct ARMul_State *state; | |
39 | ||
40 | /* Who is using the simulator. */ | |
41 | static SIM_OPEN_KIND sim_kind; | |
42 | ||
43 | /* argv[0] */ | |
44 | static char *myname; | |
45 | ||
46 | /* Memory size in bytes. */ | |
47 | static int mem_size = (1 << 21); | |
48 | ||
49 | /* Non-zero to display start up banner, and maybe other things. */ | |
50 | static int verbosity; | |
51 | ||
52 | /* Non-zero to set big endian mode. */ | |
53 | static int big_endian; | |
54 | ||
7a292a7a SS |
55 | int stop_simulator; |
56 | ||
dfcd3bfb | 57 | static void |
c906108c SS |
58 | init () |
59 | { | |
60 | static int done; | |
61 | ||
62 | if (!done) | |
63 | { | |
dfcd3bfb | 64 | ARMul_EmulateInit (); |
c906108c SS |
65 | state = ARMul_NewState (); |
66 | state->bigendSig = (big_endian ? HIGH : LOW); | |
dfcd3bfb JM |
67 | ARMul_MemoryInit (state, mem_size); |
68 | ARMul_OSInit (state); | |
69 | ARMul_CoProInit (state); | |
c906108c SS |
70 | state->verbose = verbosity; |
71 | done = 1; | |
72 | } | |
73 | } | |
74 | ||
75 | /* Set verbosity level of simulator. | |
76 | This is not intended to produce detailed tracing or debugging information. | |
77 | Just summaries. */ | |
78 | /* FIXME: common/run.c doesn't do this yet. */ | |
79 | ||
80 | void | |
81 | sim_set_verbose (v) | |
82 | int v; | |
83 | { | |
84 | verbosity = v; | |
85 | } | |
86 | ||
87 | /* Set the memory size to SIZE bytes. | |
dfcd3bfb | 88 | Must be called before initializing simulator. */ |
c906108c SS |
89 | /* FIXME: Rename to sim_set_mem_size. */ |
90 | ||
dfcd3bfb | 91 | void |
c906108c SS |
92 | sim_size (size) |
93 | int size; | |
94 | { | |
95 | mem_size = size; | |
96 | } | |
97 | ||
dfcd3bfb JM |
98 | void |
99 | ARMul_ConsolePrint (ARMul_State * state, const char *format, ...) | |
c906108c SS |
100 | { |
101 | va_list ap; | |
102 | ||
103 | if (state->verbose) | |
104 | { | |
105 | va_start (ap, format); | |
106 | vprintf (format, ap); | |
107 | va_end (ap); | |
108 | } | |
109 | } | |
110 | ||
6d358e86 NC |
111 | ARMword |
112 | ARMul_Debug (ARMul_State * state ATTRIBUTE_UNUSED, ARMword pc ATTRIBUTE_UNUSED, ARMword instr ATTRIBUTE_UNUSED) | |
c906108c | 113 | { |
6d358e86 | 114 | return 0; |
c906108c SS |
115 | } |
116 | ||
117 | int | |
118 | sim_write (sd, addr, buffer, size) | |
6d358e86 | 119 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
120 | SIM_ADDR addr; |
121 | unsigned char *buffer; | |
122 | int size; | |
123 | { | |
124 | int i; | |
3943c96b | 125 | |
c906108c | 126 | init (); |
3943c96b | 127 | |
c906108c | 128 | for (i = 0; i < size; i++) |
917bca4f | 129 | ARMul_SafeWriteByte (state, addr + i, buffer[i]); |
3943c96b | 130 | |
c906108c SS |
131 | return size; |
132 | } | |
133 | ||
134 | int | |
135 | sim_read (sd, addr, buffer, size) | |
6d358e86 | 136 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
137 | SIM_ADDR addr; |
138 | unsigned char *buffer; | |
139 | int size; | |
140 | { | |
141 | int i; | |
917bca4f | 142 | |
c906108c SS |
143 | init (); |
144 | for (i = 0; i < size; i++) | |
917bca4f NC |
145 | buffer[i] = ARMul_SafeReadByte (state, addr + i); |
146 | ||
c906108c SS |
147 | return size; |
148 | } | |
149 | ||
150 | int | |
151 | sim_trace (sd) | |
6d358e86 | 152 | SIM_DESC sd ATTRIBUTE_UNUSED; |
dfcd3bfb JM |
153 | { |
154 | (*sim_callback->printf_filtered) (sim_callback, | |
155 | "This simulator does not support tracing\n"); | |
c906108c SS |
156 | return 1; |
157 | } | |
158 | ||
159 | int | |
160 | sim_stop (sd) | |
6d358e86 | 161 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c | 162 | { |
7a292a7a SS |
163 | state->Emulate = STOP; |
164 | stop_simulator = 1; | |
165 | return 1; | |
c906108c SS |
166 | } |
167 | ||
168 | void | |
169 | sim_resume (sd, step, siggnal) | |
6d358e86 NC |
170 | SIM_DESC sd ATTRIBUTE_UNUSED; |
171 | int step; | |
172 | int siggnal ATTRIBUTE_UNUSED; | |
c906108c SS |
173 | { |
174 | state->EndCondition = 0; | |
7a292a7a | 175 | stop_simulator = 0; |
c906108c SS |
176 | |
177 | if (step) | |
178 | { | |
179 | state->Reg[15] = ARMul_DoInstr (state); | |
180 | if (state->EndCondition == 0) | |
181 | state->EndCondition = RDIError_BreakpointReached; | |
182 | } | |
183 | else | |
184 | { | |
dfcd3bfb JM |
185 | #if 1 /* JGS */ |
186 | state->NextInstr = RESUME; /* treat as PC change */ | |
c906108c SS |
187 | #endif |
188 | state->Reg[15] = ARMul_DoProg (state); | |
189 | } | |
190 | ||
191 | FLUSHPIPE; | |
192 | } | |
193 | ||
194 | SIM_RC | |
195 | sim_create_inferior (sd, abfd, argv, env) | |
6d358e86 | 196 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
197 | struct _bfd *abfd; |
198 | char **argv; | |
199 | char **env; | |
200 | { | |
dfcd3bfb | 201 | int argvlen = 0; |
1e6b544a | 202 | int mach; |
c906108c SS |
203 | char **arg; |
204 | ||
205 | if (abfd != NULL) | |
206 | ARMul_SetPC (state, bfd_get_start_address (abfd)); | |
207 | else | |
dfcd3bfb | 208 | ARMul_SetPC (state, 0); /* ??? */ |
c906108c | 209 | |
1e6b544a AO |
210 | mach = bfd_get_mach (abfd); |
211 | ||
3943c96b NC |
212 | switch (mach) |
213 | { | |
214 | default: | |
215 | (*sim_callback->printf_filtered) (sim_callback, | |
216 | "Unknown machine type; please update sim_create_inferior.\n"); | |
217 | /* fall through */ | |
218 | ||
f1129fb8 | 219 | case 0: |
3943c96b | 220 | /* We wouldn't set the machine type with earlier toolchains, so we |
f1129fb8 NC |
221 | explicitly select a processor capable of supporting all ARMs in |
222 | 32bit mode. */ | |
223 | case bfd_mach_arm_5: | |
224 | case bfd_mach_arm_5T: | |
225 | ARMul_SelectProcessor (state, ARM_v5_Prop); | |
226 | break; | |
3943c96b | 227 | |
f1129fb8 NC |
228 | case bfd_mach_arm_5TE: |
229 | ARMul_SelectProcessor (state, ARM_v5_Prop | ARM_v5e_Prop); | |
230 | break; | |
231 | ||
232 | case bfd_mach_arm_XScale: | |
233 | ARMul_SelectProcessor (state, ARM_v5_Prop | ARM_v5e_Prop | ARM_XScale_Prop); | |
3943c96b NC |
234 | break; |
235 | ||
f1129fb8 NC |
236 | case bfd_mach_arm_4: |
237 | case bfd_mach_arm_4T: | |
238 | ARMul_SelectProcessor (state, ARM_v4_Prop); | |
239 | break; | |
240 | ||
241 | case bfd_mach_arm_3: | |
242 | case bfd_mach_arm_3M: | |
3943c96b NC |
243 | ARMul_SelectProcessor (state, ARM_Lock_Prop); |
244 | break; | |
245 | ||
f1129fb8 NC |
246 | case bfd_mach_arm_2: |
247 | case bfd_mach_arm_2a: | |
3943c96b NC |
248 | ARMul_SelectProcessor (state, ARM_Fix26_Prop); |
249 | break; | |
250 | } | |
251 | ||
5f7d0a33 NC |
252 | if ( mach != bfd_mach_arm_3 |
253 | && mach != bfd_mach_arm_3M | |
254 | && mach != bfd_mach_arm_2 | |
255 | && mach != bfd_mach_arm_2a) | |
f1129fb8 NC |
256 | { |
257 | /* Reset mode to ARM. A gdb user may rerun a program that had entered | |
258 | THUMB mode from the start and cause the ARM-mode startup code to be | |
5f7d0a33 NC |
259 | executed in THUMB mode. */ |
260 | ARMul_SetCPSR (state, SVC32MODE); | |
f1129fb8 NC |
261 | } |
262 | ||
c906108c SS |
263 | if (argv != NULL) |
264 | { | |
5f7d0a33 NC |
265 | /* Set up the command line by laboriously stringing together |
266 | the environment carefully picked apart by our caller. */ | |
267 | ||
268 | /* Free any old stuff. */ | |
c906108c SS |
269 | if (state->CommandLine != NULL) |
270 | { | |
dfcd3bfb | 271 | free (state->CommandLine); |
c906108c SS |
272 | state->CommandLine = NULL; |
273 | } | |
dfcd3bfb | 274 | |
5f7d0a33 | 275 | /* See how much we need. */ |
c906108c | 276 | for (arg = argv; *arg != NULL; arg++) |
dfcd3bfb JM |
277 | argvlen += strlen (*arg) + 1; |
278 | ||
5f7d0a33 | 279 | /* Allocate it. */ |
dfcd3bfb | 280 | state->CommandLine = malloc (argvlen + 1); |
c906108c SS |
281 | if (state->CommandLine != NULL) |
282 | { | |
283 | arg = argv; | |
dfcd3bfb | 284 | state->CommandLine[0] = '\0'; |
5f7d0a33 | 285 | |
c906108c SS |
286 | for (arg = argv; *arg != NULL; arg++) |
287 | { | |
dfcd3bfb JM |
288 | strcat (state->CommandLine, *arg); |
289 | strcat (state->CommandLine, " "); | |
c906108c SS |
290 | } |
291 | } | |
292 | } | |
293 | ||
294 | if (env != NULL) | |
295 | { | |
5f7d0a33 | 296 | /* Now see if there's a MEMSIZE spec in the environment. */ |
c906108c SS |
297 | while (*env) |
298 | { | |
dfcd3bfb | 299 | if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0) |
c906108c | 300 | { |
c906108c | 301 | char *end_of_num; |
dfcd3bfb | 302 | |
5f7d0a33 | 303 | /* Set up memory limit. */ |
dfcd3bfb JM |
304 | state->MemSize = |
305 | strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0); | |
c906108c SS |
306 | } |
307 | env++; | |
308 | } | |
309 | } | |
310 | ||
311 | return SIM_RC_OK; | |
312 | } | |
313 | ||
314 | void | |
315 | sim_info (sd, verbose) | |
6d358e86 NC |
316 | SIM_DESC sd ATTRIBUTE_UNUSED; |
317 | int verbose ATTRIBUTE_UNUSED; | |
c906108c SS |
318 | { |
319 | } | |
320 | ||
321 | ||
dfcd3bfb | 322 | static int |
c906108c SS |
323 | frommem (state, memory) |
324 | struct ARMul_State *state; | |
325 | unsigned char *memory; | |
326 | { | |
327 | if (state->bigendSig == HIGH) | |
328 | { | |
329 | return (memory[0] << 24) | |
dfcd3bfb | 330 | | (memory[1] << 16) | (memory[2] << 8) | (memory[3] << 0); |
c906108c SS |
331 | } |
332 | else | |
333 | { | |
334 | return (memory[3] << 24) | |
dfcd3bfb | 335 | | (memory[2] << 16) | (memory[1] << 8) | (memory[0] << 0); |
c906108c SS |
336 | } |
337 | } | |
338 | ||
339 | ||
340 | static void | |
dfcd3bfb | 341 | tomem (state, memory, val) |
c906108c SS |
342 | struct ARMul_State *state; |
343 | unsigned char *memory; | |
344 | int val; | |
345 | { | |
346 | if (state->bigendSig == HIGH) | |
347 | { | |
348 | memory[0] = val >> 24; | |
349 | memory[1] = val >> 16; | |
350 | memory[2] = val >> 8; | |
351 | memory[3] = val >> 0; | |
352 | } | |
353 | else | |
354 | { | |
355 | memory[3] = val >> 24; | |
356 | memory[2] = val >> 16; | |
357 | memory[1] = val >> 8; | |
358 | memory[0] = val >> 0; | |
359 | } | |
360 | } | |
361 | ||
362 | int | |
363 | sim_store_register (sd, rn, memory, length) | |
6d358e86 | 364 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
365 | int rn; |
366 | unsigned char *memory; | |
6d358e86 | 367 | int length ATTRIBUTE_UNUSED; |
c906108c SS |
368 | { |
369 | init (); | |
f1129fb8 | 370 | |
3463c3fb NC |
371 | if (rn == 25) |
372 | { | |
373 | state->Cpsr = frommem (state, memory); | |
374 | ARMul_CPSRAltered (state); | |
375 | } | |
376 | else | |
377 | ARMul_SetReg (state, state->Mode, rn, frommem (state, memory)); | |
c906108c SS |
378 | return -1; |
379 | } | |
380 | ||
381 | int | |
382 | sim_fetch_register (sd, rn, memory, length) | |
6d358e86 | 383 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
384 | int rn; |
385 | unsigned char *memory; | |
6d358e86 | 386 | int length ATTRIBUTE_UNUSED; |
c906108c SS |
387 | { |
388 | ARMword regval; | |
389 | ||
390 | init (); | |
f1129fb8 | 391 | |
c906108c | 392 | if (rn < 16) |
dfcd3bfb JM |
393 | regval = ARMul_GetReg (state, state->Mode, rn); |
394 | else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */ | |
395 | regval = ARMul_GetCPSR (state); | |
c906108c | 396 | else |
dfcd3bfb | 397 | regval = 0; /* FIXME: should report an error */ |
c906108c SS |
398 | tomem (state, memory, regval); |
399 | return -1; | |
400 | } | |
401 | ||
402 | SIM_DESC | |
403 | sim_open (kind, ptr, abfd, argv) | |
404 | SIM_OPEN_KIND kind; | |
405 | host_callback *ptr; | |
406 | struct _bfd *abfd; | |
407 | char **argv; | |
408 | { | |
409 | sim_kind = kind; | |
6c9e0292 | 410 | if (myname) free (myname); |
c1a72ffd | 411 | myname = (char *) xstrdup (argv[0]); |
c906108c | 412 | sim_callback = ptr; |
dfcd3bfb | 413 | |
c906108c SS |
414 | /* Decide upon the endian-ness of the processor. |
415 | If we can, get the information from the bfd itself. | |
416 | Otherwise look to see if we have been given a command | |
417 | line switch that tells us. Otherwise default to little endian. */ | |
418 | if (abfd != NULL) | |
419 | big_endian = bfd_big_endian (abfd); | |
420 | else if (argv[1] != NULL) | |
421 | { | |
422 | int i; | |
dfcd3bfb | 423 | |
c906108c SS |
424 | /* Scan for endian-ness switch. */ |
425 | for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++) | |
dfcd3bfb JM |
426 | if (argv[i][0] == '-' && argv[i][1] == 'E') |
427 | { | |
428 | char c; | |
429 | ||
430 | if ((c = argv[i][2]) == 0) | |
431 | { | |
432 | ++i; | |
433 | c = argv[i][0]; | |
434 | } | |
435 | ||
436 | switch (c) | |
437 | { | |
438 | case 0: | |
439 | sim_callback->printf_filtered | |
440 | (sim_callback, "No argument to -E option provided\n"); | |
441 | break; | |
442 | ||
443 | case 'b': | |
444 | case 'B': | |
445 | big_endian = 1; | |
446 | break; | |
447 | ||
448 | case 'l': | |
449 | case 'L': | |
450 | big_endian = 0; | |
451 | break; | |
452 | ||
453 | default: | |
454 | sim_callback->printf_filtered | |
455 | (sim_callback, "Unrecognised argument to -E option\n"); | |
456 | break; | |
457 | } | |
458 | } | |
c906108c SS |
459 | } |
460 | ||
461 | return (SIM_DESC) 1; | |
462 | } | |
463 | ||
464 | void | |
465 | sim_close (sd, quitting) | |
6d358e86 NC |
466 | SIM_DESC sd ATTRIBUTE_UNUSED; |
467 | int quitting ATTRIBUTE_UNUSED; | |
c906108c | 468 | { |
6c9e0292 FCE |
469 | if (myname) free (myname); |
470 | myname = NULL; | |
c906108c SS |
471 | } |
472 | ||
473 | SIM_RC | |
474 | sim_load (sd, prog, abfd, from_tty) | |
475 | SIM_DESC sd; | |
476 | char *prog; | |
477 | bfd *abfd; | |
6d358e86 | 478 | int from_tty ATTRIBUTE_UNUSED; |
c906108c | 479 | { |
dfcd3bfb | 480 | extern bfd *sim_load_file (); /* ??? Don't know where this should live. */ |
c906108c SS |
481 | bfd *prog_bfd; |
482 | ||
483 | prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd, | |
dfcd3bfb | 484 | sim_kind == SIM_OPEN_DEBUG, 0, sim_write); |
c906108c SS |
485 | if (prog_bfd == NULL) |
486 | return SIM_RC_FAIL; | |
487 | ARMul_SetPC (state, bfd_get_start_address (prog_bfd)); | |
488 | if (abfd == NULL) | |
489 | bfd_close (prog_bfd); | |
490 | return SIM_RC_OK; | |
491 | } | |
492 | ||
493 | void | |
494 | sim_stop_reason (sd, reason, sigrc) | |
6d358e86 | 495 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
496 | enum sim_stop *reason; |
497 | int *sigrc; | |
498 | { | |
7a292a7a SS |
499 | if (stop_simulator) |
500 | { | |
501 | *reason = sim_stopped; | |
502 | *sigrc = SIGINT; | |
503 | } | |
504 | else if (state->EndCondition == 0) | |
c906108c SS |
505 | { |
506 | *reason = sim_exited; | |
507 | *sigrc = state->Reg[0] & 255; | |
508 | } | |
509 | else | |
510 | { | |
511 | *reason = sim_stopped; | |
512 | if (state->EndCondition == RDIError_BreakpointReached) | |
513 | *sigrc = SIGTRAP; | |
514 | else | |
515 | *sigrc = 0; | |
516 | } | |
517 | } | |
518 | ||
519 | void | |
520 | sim_do_command (sd, cmd) | |
6d358e86 NC |
521 | SIM_DESC sd ATTRIBUTE_UNUSED; |
522 | char *cmd ATTRIBUTE_UNUSED; | |
dfcd3bfb JM |
523 | { |
524 | (*sim_callback->printf_filtered) (sim_callback, | |
525 | "This simulator does not accept any commands.\n"); | |
c906108c SS |
526 | } |
527 | ||
528 | ||
529 | void | |
530 | sim_set_callbacks (ptr) | |
531 | host_callback *ptr; | |
532 | { | |
533 | sim_callback = ptr; | |
534 | } |