1 /* run front end support for arm
2 Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
4 This file is part of ARM SIM.
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)
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.
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. */
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. */
30 #include "remote-sim.h"
36 host_callback *sim_callback;
38 static struct ARMul_State *state;
40 /* Who is using the simulator. */
41 static SIM_OPEN_KIND sim_kind;
46 /* Memory size in bytes. */
47 static int mem_size = (1 << 21);
49 /* Non-zero to display start up banner, and maybe other things. */
52 /* Non-zero to set big endian mode. */
53 static int big_endian;
65 state = ARMul_NewState ();
66 state->bigendSig = (big_endian ? HIGH : LOW);
67 ARMul_MemoryInit (state, mem_size);
69 ARMul_CoProInit (state);
70 state->verbose = verbosity;
75 /* Set verbosity level of simulator.
76 This is not intended to produce detailed tracing or debugging information.
78 /* FIXME: common/run.c doesn't do this yet. */
87 /* Set the memory size to SIZE bytes.
88 Must be called before initializing simulator. */
89 /* FIXME: Rename to sim_set_mem_size. */
99 ARMul_ConsolePrint (ARMul_State * state, const char *format, ...)
105 va_start (ap, format);
106 vprintf (format, ap);
112 ARMul_Debug (ARMul_State * state ATTRIBUTE_UNUSED, ARMword pc ATTRIBUTE_UNUSED, ARMword instr ATTRIBUTE_UNUSED)
118 sim_write (sd, addr, buffer, size)
119 SIM_DESC sd ATTRIBUTE_UNUSED;
121 unsigned char *buffer;
126 for (i = 0; i < size; i++)
128 ARMul_WriteByte (state, addr + i, buffer[i]);
134 sim_read (sd, addr, buffer, size)
135 SIM_DESC sd ATTRIBUTE_UNUSED;
137 unsigned char *buffer;
142 for (i = 0; i < size; i++)
144 buffer[i] = ARMul_ReadByte (state, addr + i);
151 SIM_DESC sd ATTRIBUTE_UNUSED;
153 (*sim_callback->printf_filtered) (sim_callback,
154 "This simulator does not support tracing\n");
160 SIM_DESC sd ATTRIBUTE_UNUSED;
162 state->Emulate = STOP;
168 sim_resume (sd, step, siggnal)
169 SIM_DESC sd ATTRIBUTE_UNUSED;
171 int siggnal ATTRIBUTE_UNUSED;
173 state->EndCondition = 0;
178 state->Reg[15] = ARMul_DoInstr (state);
179 if (state->EndCondition == 0)
180 state->EndCondition = RDIError_BreakpointReached;
185 state->NextInstr = RESUME; /* treat as PC change */
187 state->Reg[15] = ARMul_DoProg (state);
194 sim_create_inferior (sd, abfd, argv, env)
195 SIM_DESC sd ATTRIBUTE_UNUSED;
205 ARMul_SetPC (state, bfd_get_start_address (abfd));
207 ARMul_SetPC (state, 0); /* ??? */
209 mach = bfd_get_mach (abfd);
213 (*sim_callback->printf_filtered) (sim_callback,
214 "Unknown machine type; please update sim_create_inferior.\n");
218 /* We wouldn't set the machine type with earlier toolchains, so we
219 explicitly select a processor capable of supporting all ARM
227 ARMul_SelectProcessor (state, STRONGARM);
228 /* Reset mode to ARM. A gdb user may rerun a program that had entered
229 THUMB mode from the start and cause the ARM-mode startup code to be
230 executed in THUMB mode. */
231 ARMul_SetCPSR (state, USER32MODE);
236 ARMul_SelectProcessor (state, ARM600);
241 ARMul_SelectProcessor (state, ARM2);
248 ** Set up the command line (by laboriously stringing together the
249 ** environment carefully picked apart by our caller...)
251 /* Free any old stuff */
252 if (state->CommandLine != NULL)
254 free (state->CommandLine);
255 state->CommandLine = NULL;
258 /* See how much we need */
259 for (arg = argv; *arg != NULL; arg++)
260 argvlen += strlen (*arg) + 1;
263 state->CommandLine = malloc (argvlen + 1);
264 if (state->CommandLine != NULL)
267 state->CommandLine[0] = '\0';
268 for (arg = argv; *arg != NULL; arg++)
270 strcat (state->CommandLine, *arg);
271 strcat (state->CommandLine, " ");
278 /* Now see if there's a MEMSIZE spec in the environment */
281 if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0)
285 /* Set up memory limit */
287 strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0);
297 sim_info (sd, verbose)
298 SIM_DESC sd ATTRIBUTE_UNUSED;
299 int verbose ATTRIBUTE_UNUSED;
305 frommem (state, memory)
306 struct ARMul_State *state;
307 unsigned char *memory;
309 if (state->bigendSig == HIGH)
311 return (memory[0] << 24)
312 | (memory[1] << 16) | (memory[2] << 8) | (memory[3] << 0);
316 return (memory[3] << 24)
317 | (memory[2] << 16) | (memory[1] << 8) | (memory[0] << 0);
323 tomem (state, memory, val)
324 struct ARMul_State *state;
325 unsigned char *memory;
328 if (state->bigendSig == HIGH)
330 memory[0] = val >> 24;
331 memory[1] = val >> 16;
332 memory[2] = val >> 8;
333 memory[3] = val >> 0;
337 memory[3] = val >> 24;
338 memory[2] = val >> 16;
339 memory[1] = val >> 8;
340 memory[0] = val >> 0;
345 sim_store_register (sd, rn, memory, length)
346 SIM_DESC sd ATTRIBUTE_UNUSED;
348 unsigned char *memory;
349 int length ATTRIBUTE_UNUSED;
354 state->Cpsr = frommem (state, memory);
355 ARMul_CPSRAltered (state);
358 ARMul_SetReg (state, state->Mode, rn, frommem (state, memory));
363 sim_fetch_register (sd, rn, memory, length)
364 SIM_DESC sd ATTRIBUTE_UNUSED;
366 unsigned char *memory;
367 int length ATTRIBUTE_UNUSED;
373 regval = ARMul_GetReg (state, state->Mode, rn);
374 else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */
375 regval = ARMul_GetCPSR (state);
377 regval = 0; /* FIXME: should report an error */
378 tomem (state, memory, regval);
383 sim_open (kind, ptr, abfd, argv)
390 if (myname) free (myname);
391 myname = (char *) xstrdup (argv[0]);
394 /* Decide upon the endian-ness of the processor.
395 If we can, get the information from the bfd itself.
396 Otherwise look to see if we have been given a command
397 line switch that tells us. Otherwise default to little endian. */
399 big_endian = bfd_big_endian (abfd);
400 else if (argv[1] != NULL)
404 /* Scan for endian-ness switch. */
405 for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
406 if (argv[i][0] == '-' && argv[i][1] == 'E')
410 if ((c = argv[i][2]) == 0)
419 sim_callback->printf_filtered
420 (sim_callback, "No argument to -E option provided\n");
434 sim_callback->printf_filtered
435 (sim_callback, "Unrecognised argument to -E option\n");
445 sim_close (sd, quitting)
446 SIM_DESC sd ATTRIBUTE_UNUSED;
447 int quitting ATTRIBUTE_UNUSED;
449 if (myname) free (myname);
454 sim_load (sd, prog, abfd, from_tty)
458 int from_tty ATTRIBUTE_UNUSED;
460 extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
463 prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd,
464 sim_kind == SIM_OPEN_DEBUG, 0, sim_write);
465 if (prog_bfd == NULL)
467 ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
469 bfd_close (prog_bfd);
474 sim_stop_reason (sd, reason, sigrc)
475 SIM_DESC sd ATTRIBUTE_UNUSED;
476 enum sim_stop *reason;
481 *reason = sim_stopped;
484 else if (state->EndCondition == 0)
486 *reason = sim_exited;
487 *sigrc = state->Reg[0] & 255;
491 *reason = sim_stopped;
492 if (state->EndCondition == RDIError_BreakpointReached)
500 sim_do_command (sd, cmd)
501 SIM_DESC sd ATTRIBUTE_UNUSED;
502 char *cmd ATTRIBUTE_UNUSED;
504 (*sim_callback->printf_filtered) (sim_callback,
505 "This simulator does not accept any commands.\n");
510 sim_set_callbacks (ptr)