1 /* run front end support for arm
2 Copyright (C) 1995, 1996, 1997 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;
204 ARMul_SetPC (state, bfd_get_start_address (abfd));
206 ARMul_SetPC (state, 0); /* ??? */
208 /* We explicitly select a processor capable of supporting the ARM
210 ARMul_SelectProcessor (state, ARM600);
211 /* And then we force the simulated CPU into the 32bit User mode. */
212 ARMul_SetCPSR (state, USER32MODE);
217 ** Set up the command line (by laboriously stringing together the
218 ** environment carefully picked apart by our caller...)
220 /* Free any old stuff */
221 if (state->CommandLine != NULL)
223 free (state->CommandLine);
224 state->CommandLine = NULL;
227 /* See how much we need */
228 for (arg = argv; *arg != NULL; arg++)
229 argvlen += strlen (*arg) + 1;
232 state->CommandLine = malloc (argvlen + 1);
233 if (state->CommandLine != NULL)
236 state->CommandLine[0] = '\0';
237 for (arg = argv; *arg != NULL; arg++)
239 strcat (state->CommandLine, *arg);
240 strcat (state->CommandLine, " ");
247 /* Now see if there's a MEMSIZE spec in the environment */
250 if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0)
254 /* Set up memory limit */
256 strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0);
266 sim_info (sd, verbose)
267 SIM_DESC sd ATTRIBUTE_UNUSED;
268 int verbose ATTRIBUTE_UNUSED;
274 frommem (state, memory)
275 struct ARMul_State *state;
276 unsigned char *memory;
278 if (state->bigendSig == HIGH)
280 return (memory[0] << 24)
281 | (memory[1] << 16) | (memory[2] << 8) | (memory[3] << 0);
285 return (memory[3] << 24)
286 | (memory[2] << 16) | (memory[1] << 8) | (memory[0] << 0);
292 tomem (state, memory, val)
293 struct ARMul_State *state;
294 unsigned char *memory;
297 if (state->bigendSig == HIGH)
299 memory[0] = val >> 24;
300 memory[1] = val >> 16;
301 memory[2] = val >> 8;
302 memory[3] = val >> 0;
306 memory[3] = val >> 24;
307 memory[2] = val >> 16;
308 memory[1] = val >> 8;
309 memory[0] = val >> 0;
314 sim_store_register (sd, rn, memory, length)
315 SIM_DESC sd ATTRIBUTE_UNUSED;
317 unsigned char *memory;
318 int length ATTRIBUTE_UNUSED;
323 state->Cpsr = frommem (state, memory);
324 ARMul_CPSRAltered (state);
327 ARMul_SetReg (state, state->Mode, rn, frommem (state, memory));
332 sim_fetch_register (sd, rn, memory, length)
333 SIM_DESC sd ATTRIBUTE_UNUSED;
335 unsigned char *memory;
336 int length ATTRIBUTE_UNUSED;
342 regval = ARMul_GetReg (state, state->Mode, rn);
343 else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */
344 regval = ARMul_GetCPSR (state);
346 regval = 0; /* FIXME: should report an error */
347 tomem (state, memory, regval);
352 sim_open (kind, ptr, abfd, argv)
359 if (myname) free (myname);
360 myname = (char *) xstrdup (argv[0]);
363 /* Decide upon the endian-ness of the processor.
364 If we can, get the information from the bfd itself.
365 Otherwise look to see if we have been given a command
366 line switch that tells us. Otherwise default to little endian. */
368 big_endian = bfd_big_endian (abfd);
369 else if (argv[1] != NULL)
373 /* Scan for endian-ness switch. */
374 for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
375 if (argv[i][0] == '-' && argv[i][1] == 'E')
379 if ((c = argv[i][2]) == 0)
388 sim_callback->printf_filtered
389 (sim_callback, "No argument to -E option provided\n");
403 sim_callback->printf_filtered
404 (sim_callback, "Unrecognised argument to -E option\n");
414 sim_close (sd, quitting)
415 SIM_DESC sd ATTRIBUTE_UNUSED;
416 int quitting ATTRIBUTE_UNUSED;
418 if (myname) free (myname);
423 sim_load (sd, prog, abfd, from_tty)
427 int from_tty ATTRIBUTE_UNUSED;
429 extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
432 prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd,
433 sim_kind == SIM_OPEN_DEBUG, 0, sim_write);
434 if (prog_bfd == NULL)
436 ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
438 bfd_close (prog_bfd);
443 sim_stop_reason (sd, reason, sigrc)
444 SIM_DESC sd ATTRIBUTE_UNUSED;
445 enum sim_stop *reason;
450 *reason = sim_stopped;
453 else if (state->EndCondition == 0)
455 *reason = sim_exited;
456 *sigrc = state->Reg[0] & 255;
460 *reason = sim_stopped;
461 if (state->EndCondition == RDIError_BreakpointReached)
469 sim_do_command (sd, cmd)
470 SIM_DESC sd ATTRIBUTE_UNUSED;
471 char *cmd ATTRIBUTE_UNUSED;
473 (*sim_callback->printf_filtered) (sim_callback,
474 "This simulator does not accept any commands.\n");
479 sim_set_callbacks (ptr)