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Commit | Line | Data |
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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> | |
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; | |
125 | init (); | |
126 | for (i = 0; i < size; i++) | |
127 | { | |
dfcd3bfb | 128 | ARMul_WriteByte (state, addr + i, buffer[i]); |
c906108c SS |
129 | } |
130 | return size; | |
131 | } | |
132 | ||
133 | int | |
134 | sim_read (sd, addr, buffer, size) | |
6d358e86 | 135 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
136 | SIM_ADDR addr; |
137 | unsigned char *buffer; | |
138 | int size; | |
139 | { | |
140 | int i; | |
141 | init (); | |
142 | for (i = 0; i < size; i++) | |
143 | { | |
144 | buffer[i] = ARMul_ReadByte (state, addr + i); | |
145 | } | |
146 | return size; | |
147 | } | |
148 | ||
149 | int | |
150 | sim_trace (sd) | |
6d358e86 | 151 | SIM_DESC sd ATTRIBUTE_UNUSED; |
dfcd3bfb JM |
152 | { |
153 | (*sim_callback->printf_filtered) (sim_callback, | |
154 | "This simulator does not support tracing\n"); | |
c906108c SS |
155 | return 1; |
156 | } | |
157 | ||
158 | int | |
159 | sim_stop (sd) | |
6d358e86 | 160 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c | 161 | { |
7a292a7a SS |
162 | state->Emulate = STOP; |
163 | stop_simulator = 1; | |
164 | return 1; | |
c906108c SS |
165 | } |
166 | ||
167 | void | |
168 | sim_resume (sd, step, siggnal) | |
6d358e86 NC |
169 | SIM_DESC sd ATTRIBUTE_UNUSED; |
170 | int step; | |
171 | int siggnal ATTRIBUTE_UNUSED; | |
c906108c SS |
172 | { |
173 | state->EndCondition = 0; | |
7a292a7a | 174 | stop_simulator = 0; |
c906108c SS |
175 | |
176 | if (step) | |
177 | { | |
178 | state->Reg[15] = ARMul_DoInstr (state); | |
179 | if (state->EndCondition == 0) | |
180 | state->EndCondition = RDIError_BreakpointReached; | |
181 | } | |
182 | else | |
183 | { | |
dfcd3bfb JM |
184 | #if 1 /* JGS */ |
185 | state->NextInstr = RESUME; /* treat as PC change */ | |
c906108c SS |
186 | #endif |
187 | state->Reg[15] = ARMul_DoProg (state); | |
188 | } | |
189 | ||
190 | FLUSHPIPE; | |
191 | } | |
192 | ||
193 | SIM_RC | |
194 | sim_create_inferior (sd, abfd, argv, env) | |
6d358e86 | 195 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
196 | struct _bfd *abfd; |
197 | char **argv; | |
198 | char **env; | |
199 | { | |
dfcd3bfb | 200 | int argvlen = 0; |
c906108c SS |
201 | char **arg; |
202 | ||
203 | if (abfd != NULL) | |
204 | ARMul_SetPC (state, bfd_get_start_address (abfd)); | |
205 | else | |
dfcd3bfb | 206 | ARMul_SetPC (state, 0); /* ??? */ |
c906108c | 207 | |
dfcd3bfb | 208 | #if 1 /* JGS */ |
c906108c SS |
209 | /* We explicitly select a processor capable of supporting the ARM |
210 | 32bit mode, and then we force the simulated CPU into the 32bit | |
211 | User mode: */ | |
dfcd3bfb JM |
212 | ARMul_SelectProcessor (state, ARM600); |
213 | ARMul_SetCPSR (state, USER32MODE); | |
c906108c SS |
214 | #endif |
215 | ||
216 | if (argv != NULL) | |
217 | { | |
218 | /* | |
dfcd3bfb JM |
219 | ** Set up the command line (by laboriously stringing together the |
220 | ** environment carefully picked apart by our caller...) | |
221 | */ | |
c906108c SS |
222 | /* Free any old stuff */ |
223 | if (state->CommandLine != NULL) | |
224 | { | |
dfcd3bfb | 225 | free (state->CommandLine); |
c906108c SS |
226 | state->CommandLine = NULL; |
227 | } | |
dfcd3bfb | 228 | |
c906108c SS |
229 | /* See how much we need */ |
230 | for (arg = argv; *arg != NULL; arg++) | |
dfcd3bfb JM |
231 | argvlen += strlen (*arg) + 1; |
232 | ||
c906108c | 233 | /* allocate it... */ |
dfcd3bfb | 234 | state->CommandLine = malloc (argvlen + 1); |
c906108c SS |
235 | if (state->CommandLine != NULL) |
236 | { | |
237 | arg = argv; | |
dfcd3bfb | 238 | state->CommandLine[0] = '\0'; |
c906108c SS |
239 | for (arg = argv; *arg != NULL; arg++) |
240 | { | |
dfcd3bfb JM |
241 | strcat (state->CommandLine, *arg); |
242 | strcat (state->CommandLine, " "); | |
c906108c SS |
243 | } |
244 | } | |
245 | } | |
246 | ||
247 | if (env != NULL) | |
248 | { | |
249 | /* Now see if there's a MEMSIZE spec in the environment */ | |
250 | while (*env) | |
251 | { | |
dfcd3bfb | 252 | if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0) |
c906108c | 253 | { |
c906108c | 254 | char *end_of_num; |
dfcd3bfb | 255 | |
c906108c | 256 | /* Set up memory limit */ |
dfcd3bfb JM |
257 | state->MemSize = |
258 | strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0); | |
c906108c SS |
259 | } |
260 | env++; | |
261 | } | |
262 | } | |
263 | ||
264 | return SIM_RC_OK; | |
265 | } | |
266 | ||
267 | void | |
268 | sim_info (sd, verbose) | |
6d358e86 NC |
269 | SIM_DESC sd ATTRIBUTE_UNUSED; |
270 | int verbose ATTRIBUTE_UNUSED; | |
c906108c SS |
271 | { |
272 | } | |
273 | ||
274 | ||
dfcd3bfb | 275 | static int |
c906108c SS |
276 | frommem (state, memory) |
277 | struct ARMul_State *state; | |
278 | unsigned char *memory; | |
279 | { | |
280 | if (state->bigendSig == HIGH) | |
281 | { | |
282 | return (memory[0] << 24) | |
dfcd3bfb | 283 | | (memory[1] << 16) | (memory[2] << 8) | (memory[3] << 0); |
c906108c SS |
284 | } |
285 | else | |
286 | { | |
287 | return (memory[3] << 24) | |
dfcd3bfb | 288 | | (memory[2] << 16) | (memory[1] << 8) | (memory[0] << 0); |
c906108c SS |
289 | } |
290 | } | |
291 | ||
292 | ||
293 | static void | |
dfcd3bfb | 294 | tomem (state, memory, val) |
c906108c SS |
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) | |
6d358e86 | 317 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
318 | int rn; |
319 | unsigned char *memory; | |
6d358e86 | 320 | int length ATTRIBUTE_UNUSED; |
c906108c SS |
321 | { |
322 | init (); | |
3463c3fb NC |
323 | if (rn == 25) |
324 | { | |
325 | state->Cpsr = frommem (state, memory); | |
326 | ARMul_CPSRAltered (state); | |
327 | } | |
328 | else | |
329 | ARMul_SetReg (state, state->Mode, rn, frommem (state, memory)); | |
c906108c SS |
330 | return -1; |
331 | } | |
332 | ||
333 | int | |
334 | sim_fetch_register (sd, rn, memory, length) | |
6d358e86 | 335 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
336 | int rn; |
337 | unsigned char *memory; | |
6d358e86 | 338 | int length ATTRIBUTE_UNUSED; |
c906108c SS |
339 | { |
340 | ARMword regval; | |
341 | ||
342 | init (); | |
343 | if (rn < 16) | |
dfcd3bfb JM |
344 | regval = ARMul_GetReg (state, state->Mode, rn); |
345 | else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */ | |
346 | regval = ARMul_GetCPSR (state); | |
c906108c | 347 | else |
dfcd3bfb | 348 | regval = 0; /* FIXME: should report an error */ |
c906108c SS |
349 | tomem (state, memory, regval); |
350 | return -1; | |
351 | } | |
352 | ||
353 | SIM_DESC | |
354 | sim_open (kind, ptr, abfd, argv) | |
355 | SIM_OPEN_KIND kind; | |
356 | host_callback *ptr; | |
357 | struct _bfd *abfd; | |
358 | char **argv; | |
359 | { | |
360 | sim_kind = kind; | |
6c9e0292 FCE |
361 | if (myname) free (myname); |
362 | myname = xstrdup (argv[0]); | |
c906108c | 363 | sim_callback = ptr; |
dfcd3bfb | 364 | |
c906108c SS |
365 | /* Decide upon the endian-ness of the processor. |
366 | If we can, get the information from the bfd itself. | |
367 | Otherwise look to see if we have been given a command | |
368 | line switch that tells us. Otherwise default to little endian. */ | |
369 | if (abfd != NULL) | |
370 | big_endian = bfd_big_endian (abfd); | |
371 | else if (argv[1] != NULL) | |
372 | { | |
373 | int i; | |
dfcd3bfb | 374 | |
c906108c SS |
375 | /* Scan for endian-ness switch. */ |
376 | for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++) | |
dfcd3bfb JM |
377 | if (argv[i][0] == '-' && argv[i][1] == 'E') |
378 | { | |
379 | char c; | |
380 | ||
381 | if ((c = argv[i][2]) == 0) | |
382 | { | |
383 | ++i; | |
384 | c = argv[i][0]; | |
385 | } | |
386 | ||
387 | switch (c) | |
388 | { | |
389 | case 0: | |
390 | sim_callback->printf_filtered | |
391 | (sim_callback, "No argument to -E option provided\n"); | |
392 | break; | |
393 | ||
394 | case 'b': | |
395 | case 'B': | |
396 | big_endian = 1; | |
397 | break; | |
398 | ||
399 | case 'l': | |
400 | case 'L': | |
401 | big_endian = 0; | |
402 | break; | |
403 | ||
404 | default: | |
405 | sim_callback->printf_filtered | |
406 | (sim_callback, "Unrecognised argument to -E option\n"); | |
407 | break; | |
408 | } | |
409 | } | |
c906108c SS |
410 | } |
411 | ||
412 | return (SIM_DESC) 1; | |
413 | } | |
414 | ||
415 | void | |
416 | sim_close (sd, quitting) | |
6d358e86 NC |
417 | SIM_DESC sd ATTRIBUTE_UNUSED; |
418 | int quitting ATTRIBUTE_UNUSED; | |
c906108c | 419 | { |
6c9e0292 FCE |
420 | if (myname) free (myname); |
421 | myname = NULL; | |
c906108c SS |
422 | } |
423 | ||
424 | SIM_RC | |
425 | sim_load (sd, prog, abfd, from_tty) | |
426 | SIM_DESC sd; | |
427 | char *prog; | |
428 | bfd *abfd; | |
6d358e86 | 429 | int from_tty ATTRIBUTE_UNUSED; |
c906108c | 430 | { |
dfcd3bfb | 431 | extern bfd *sim_load_file (); /* ??? Don't know where this should live. */ |
c906108c SS |
432 | bfd *prog_bfd; |
433 | ||
434 | prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd, | |
dfcd3bfb | 435 | sim_kind == SIM_OPEN_DEBUG, 0, sim_write); |
c906108c SS |
436 | if (prog_bfd == NULL) |
437 | return SIM_RC_FAIL; | |
438 | ARMul_SetPC (state, bfd_get_start_address (prog_bfd)); | |
439 | if (abfd == NULL) | |
440 | bfd_close (prog_bfd); | |
441 | return SIM_RC_OK; | |
442 | } | |
443 | ||
444 | void | |
445 | sim_stop_reason (sd, reason, sigrc) | |
6d358e86 | 446 | SIM_DESC sd ATTRIBUTE_UNUSED; |
c906108c SS |
447 | enum sim_stop *reason; |
448 | int *sigrc; | |
449 | { | |
7a292a7a SS |
450 | if (stop_simulator) |
451 | { | |
452 | *reason = sim_stopped; | |
453 | *sigrc = SIGINT; | |
454 | } | |
455 | else if (state->EndCondition == 0) | |
c906108c SS |
456 | { |
457 | *reason = sim_exited; | |
458 | *sigrc = state->Reg[0] & 255; | |
459 | } | |
460 | else | |
461 | { | |
462 | *reason = sim_stopped; | |
463 | if (state->EndCondition == RDIError_BreakpointReached) | |
464 | *sigrc = SIGTRAP; | |
465 | else | |
466 | *sigrc = 0; | |
467 | } | |
468 | } | |
469 | ||
470 | void | |
471 | sim_do_command (sd, cmd) | |
6d358e86 NC |
472 | SIM_DESC sd ATTRIBUTE_UNUSED; |
473 | char *cmd ATTRIBUTE_UNUSED; | |
dfcd3bfb JM |
474 | { |
475 | (*sim_callback->printf_filtered) (sim_callback, | |
476 | "This simulator does not accept any commands.\n"); | |
c906108c SS |
477 | } |
478 | ||
479 | ||
480 | void | |
481 | sim_set_callbacks (ptr) | |
482 | host_callback *ptr; | |
483 | { | |
484 | sim_callback = ptr; | |
485 | } |