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;
128 for (i = 0; i < size; i++)
129 ARMul_WriteByte (state, addr + i, buffer[i]);
135 sim_read (sd, addr, buffer, size)
136 SIM_DESC sd ATTRIBUTE_UNUSED;
138 unsigned char *buffer;
143 for (i = 0; i < size; i++)
145 buffer[i] = ARMul_ReadByte (state, addr + i);
152 SIM_DESC sd ATTRIBUTE_UNUSED;
154 (*sim_callback->printf_filtered) (sim_callback,
155 "This simulator does not support tracing\n");
161 SIM_DESC sd ATTRIBUTE_UNUSED;
163 state->Emulate = STOP;
169 sim_resume (sd, step, siggnal)
170 SIM_DESC sd ATTRIBUTE_UNUSED;
172 int siggnal ATTRIBUTE_UNUSED;
174 state->EndCondition = 0;
179 state->Reg[15] = ARMul_DoInstr (state);
180 if (state->EndCondition == 0)
181 state->EndCondition = RDIError_BreakpointReached;
186 state->NextInstr = RESUME; /* treat as PC change */
188 state->Reg[15] = ARMul_DoProg (state);
195 sim_create_inferior (sd, abfd, argv, env)
196 SIM_DESC sd ATTRIBUTE_UNUSED;
206 ARMul_SetPC (state, bfd_get_start_address (abfd));
208 ARMul_SetPC (state, 0); /* ??? */
210 mach = bfd_get_mach (abfd);
215 (*sim_callback->printf_filtered) (sim_callback,
216 "Unknown machine type; please update sim_create_inferior.\n");
220 /* We wouldn't set the machine type with earlier toolchains, so we
221 explicitly select a processor capable of supporting all ARM
229 if (mach == 7 || mach == 8)
230 ARMul_SelectProcessor (state, ARM_v5_Prop);
232 ARMul_SelectProcessor (state, ARM_v4_Prop);
233 /* Reset mode to ARM. A gdb user may rerun a program that had entered
234 THUMB mode from the start and cause the ARM-mode startup code to be
235 executed in THUMB mode. */
236 ARMul_SetCPSR (state, USER32MODE);
241 ARMul_SelectProcessor (state, ARM_Lock_Prop);
246 ARMul_SelectProcessor (state, ARM_Fix26_Prop);
253 ** Set up the command line (by laboriously stringing together the
254 ** environment carefully picked apart by our caller...)
256 /* Free any old stuff */
257 if (state->CommandLine != NULL)
259 free (state->CommandLine);
260 state->CommandLine = NULL;
263 /* See how much we need */
264 for (arg = argv; *arg != NULL; arg++)
265 argvlen += strlen (*arg) + 1;
268 state->CommandLine = malloc (argvlen + 1);
269 if (state->CommandLine != NULL)
272 state->CommandLine[0] = '\0';
273 for (arg = argv; *arg != NULL; arg++)
275 strcat (state->CommandLine, *arg);
276 strcat (state->CommandLine, " ");
283 /* Now see if there's a MEMSIZE spec in the environment */
286 if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0)
290 /* Set up memory limit */
292 strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0);
302 sim_info (sd, verbose)
303 SIM_DESC sd ATTRIBUTE_UNUSED;
304 int verbose ATTRIBUTE_UNUSED;
310 frommem (state, memory)
311 struct ARMul_State *state;
312 unsigned char *memory;
314 if (state->bigendSig == HIGH)
316 return (memory[0] << 24)
317 | (memory[1] << 16) | (memory[2] << 8) | (memory[3] << 0);
321 return (memory[3] << 24)
322 | (memory[2] << 16) | (memory[1] << 8) | (memory[0] << 0);
328 tomem (state, memory, val)
329 struct ARMul_State *state;
330 unsigned char *memory;
333 if (state->bigendSig == HIGH)
335 memory[0] = val >> 24;
336 memory[1] = val >> 16;
337 memory[2] = val >> 8;
338 memory[3] = val >> 0;
342 memory[3] = val >> 24;
343 memory[2] = val >> 16;
344 memory[1] = val >> 8;
345 memory[0] = val >> 0;
350 sim_store_register (sd, rn, memory, length)
351 SIM_DESC sd ATTRIBUTE_UNUSED;
353 unsigned char *memory;
354 int length ATTRIBUTE_UNUSED;
359 state->Cpsr = frommem (state, memory);
360 ARMul_CPSRAltered (state);
363 ARMul_SetReg (state, state->Mode, rn, frommem (state, memory));
368 sim_fetch_register (sd, rn, memory, length)
369 SIM_DESC sd ATTRIBUTE_UNUSED;
371 unsigned char *memory;
372 int length ATTRIBUTE_UNUSED;
378 regval = ARMul_GetReg (state, state->Mode, rn);
379 else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */
380 regval = ARMul_GetCPSR (state);
382 regval = 0; /* FIXME: should report an error */
383 tomem (state, memory, regval);
388 sim_open (kind, ptr, abfd, argv)
395 if (myname) free (myname);
396 myname = (char *) xstrdup (argv[0]);
399 /* Decide upon the endian-ness of the processor.
400 If we can, get the information from the bfd itself.
401 Otherwise look to see if we have been given a command
402 line switch that tells us. Otherwise default to little endian. */
404 big_endian = bfd_big_endian (abfd);
405 else if (argv[1] != NULL)
409 /* Scan for endian-ness switch. */
410 for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
411 if (argv[i][0] == '-' && argv[i][1] == 'E')
415 if ((c = argv[i][2]) == 0)
424 sim_callback->printf_filtered
425 (sim_callback, "No argument to -E option provided\n");
439 sim_callback->printf_filtered
440 (sim_callback, "Unrecognised argument to -E option\n");
450 sim_close (sd, quitting)
451 SIM_DESC sd ATTRIBUTE_UNUSED;
452 int quitting ATTRIBUTE_UNUSED;
454 if (myname) free (myname);
459 sim_load (sd, prog, abfd, from_tty)
463 int from_tty ATTRIBUTE_UNUSED;
465 extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
468 prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd,
469 sim_kind == SIM_OPEN_DEBUG, 0, sim_write);
470 if (prog_bfd == NULL)
472 ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
474 bfd_close (prog_bfd);
479 sim_stop_reason (sd, reason, sigrc)
480 SIM_DESC sd ATTRIBUTE_UNUSED;
481 enum sim_stop *reason;
486 *reason = sim_stopped;
489 else if (state->EndCondition == 0)
491 *reason = sim_exited;
492 *sigrc = state->Reg[0] & 255;
496 *reason = sim_stopped;
497 if (state->EndCondition == RDIError_BreakpointReached)
505 sim_do_command (sd, cmd)
506 SIM_DESC sd ATTRIBUTE_UNUSED;
507 char *cmd ATTRIBUTE_UNUSED;
509 (*sim_callback->printf_filtered) (sim_callback,
510 "This simulator does not accept any commands.\n");
515 sim_set_callbacks (ptr)