1 /* run front end support for arm
2 Copyright (C) 1995, 1996, 1997, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of ARM SIM.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 2, or (at your
10 option) any later version.
12 GCC is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public
18 License along with this program; if not, write to the Free
19 Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This file provides the interface between the simulator and
23 run.c and gdb (when the simulator is linked with gdb).
24 All simulator interaction should go through this file. */
32 #include "remote-sim.h"
37 #include "sim-utils.h"
39 host_callback *sim_callback;
41 static struct ARMul_State *state;
43 /* Who is using the simulator. */
44 static SIM_OPEN_KIND sim_kind;
49 /* Memory size in bytes. */
50 static int mem_size = (1 << 21);
52 /* Non-zero to display start up banner, and maybe other things. */
55 /* Non-zero to set big endian mode. */
56 static int big_endian;
68 state = ARMul_NewState ();
69 state->bigendSig = (big_endian ? HIGH : LOW);
70 ARMul_MemoryInit (state, mem_size);
72 ARMul_CoProInit (state);
73 state->verbose = verbosity;
78 /* Set verbosity level of simulator.
79 This is not intended to produce detailed tracing or debugging information.
81 /* FIXME: common/run.c doesn't do this yet. */
90 /* Set the memory size to SIZE bytes.
91 Must be called before initializing simulator. */
92 /* FIXME: Rename to sim_set_mem_size. */
102 ARMul_ConsolePrint VPARAMS ((ARMul_State * state,
110 va_start (ap, format);
111 vprintf (format, ap);
117 ARMul_Debug (state, pc, instr)
118 ARMul_State * state ATTRIBUTE_UNUSED;
119 ARMword pc ATTRIBUTE_UNUSED;
120 ARMword instr ATTRIBUTE_UNUSED;
126 sim_write (sd, addr, buffer, size)
127 SIM_DESC sd ATTRIBUTE_UNUSED;
129 unsigned char * buffer;
136 for (i = 0; i < size; i++)
137 ARMul_SafeWriteByte (state, addr + i, buffer[i]);
143 sim_read (sd, addr, buffer, size)
144 SIM_DESC sd ATTRIBUTE_UNUSED;
146 unsigned char * buffer;
153 for (i = 0; i < size; i++)
154 buffer[i] = ARMul_SafeReadByte (state, addr + i);
161 SIM_DESC sd ATTRIBUTE_UNUSED;
163 (*sim_callback->printf_filtered)
165 "This simulator does not support tracing\n");
171 SIM_DESC sd ATTRIBUTE_UNUSED;
173 state->Emulate = STOP;
179 sim_resume (sd, step, siggnal)
180 SIM_DESC sd ATTRIBUTE_UNUSED;
182 int siggnal ATTRIBUTE_UNUSED;
184 state->EndCondition = 0;
189 state->Reg[15] = ARMul_DoInstr (state);
190 if (state->EndCondition == 0)
191 state->EndCondition = RDIError_BreakpointReached;
195 state->NextInstr = RESUME; /* treat as PC change */
196 state->Reg[15] = ARMul_DoProg (state);
203 sim_create_inferior (sd, abfd, argv, env)
204 SIM_DESC sd ATTRIBUTE_UNUSED;
214 ARMul_SetPC (state, bfd_get_start_address (abfd));
216 ARMul_SetPC (state, 0); /* ??? */
218 mach = bfd_get_mach (abfd);
223 (*sim_callback->printf_filtered)
225 "Unknown machine type; please update sim_create_inferior.\n");
229 /* We wouldn't set the machine type with earlier toolchains, so we
230 explicitly select a processor capable of supporting all ARMs in
232 case bfd_mach_arm_XScale:
233 ARMul_SelectProcessor (state, ARM_v5_Prop | ARM_v5e_Prop | ARM_XScale_Prop);
237 case bfd_mach_arm_5T:
238 ARMul_SelectProcessor (state, ARM_v5_Prop);
241 case bfd_mach_arm_5TE:
242 ARMul_SelectProcessor (state, ARM_v5_Prop | ARM_v5e_Prop);
246 case bfd_mach_arm_4T:
247 ARMul_SelectProcessor (state, ARM_v4_Prop);
251 case bfd_mach_arm_3M:
252 ARMul_SelectProcessor (state, ARM_Lock_Prop);
256 case bfd_mach_arm_2a:
257 ARMul_SelectProcessor (state, ARM_Fix26_Prop);
261 if ( mach != bfd_mach_arm_3
262 && mach != bfd_mach_arm_3M
263 && mach != bfd_mach_arm_2
264 && mach != bfd_mach_arm_2a)
266 /* Reset mode to ARM. A gdb user may rerun a program that had entered
267 THUMB mode from the start and cause the ARM-mode startup code to be
268 executed in THUMB mode. */
269 ARMul_SetCPSR (state, SVC32MODE);
274 /* Set up the command line by laboriously stringing together
275 the environment carefully picked apart by our caller. */
277 /* Free any old stuff. */
278 if (state->CommandLine != NULL)
280 free (state->CommandLine);
281 state->CommandLine = NULL;
284 /* See how much we need. */
285 for (arg = argv; *arg != NULL; arg++)
286 argvlen += strlen (*arg) + 1;
289 state->CommandLine = malloc (argvlen + 1);
290 if (state->CommandLine != NULL)
293 state->CommandLine[0] = '\0';
295 for (arg = argv; *arg != NULL; arg++)
297 strcat (state->CommandLine, *arg);
298 strcat (state->CommandLine, " ");
305 /* Now see if there's a MEMSIZE spec in the environment. */
308 if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0)
312 /* Set up memory limit. */
314 strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0);
324 sim_info (sd, verbose)
325 SIM_DESC sd ATTRIBUTE_UNUSED;
326 int verbose ATTRIBUTE_UNUSED;
331 frommem (state, memory)
332 struct ARMul_State *state;
333 unsigned char *memory;
335 if (state->bigendSig == HIGH)
336 return (memory[0] << 24) | (memory[1] << 16)
337 | (memory[2] << 8) | (memory[3] << 0);
339 return (memory[3] << 24) | (memory[2] << 16)
340 | (memory[1] << 8) | (memory[0] << 0);
344 tomem (state, memory, val)
345 struct ARMul_State *state;
346 unsigned char *memory;
349 if (state->bigendSig == HIGH)
351 memory[0] = val >> 24;
352 memory[1] = val >> 16;
353 memory[2] = val >> 8;
354 memory[3] = val >> 0;
358 memory[3] = val >> 24;
359 memory[2] = val >> 16;
360 memory[1] = val >> 8;
361 memory[0] = val >> 0;
366 sim_store_register (sd, rn, memory, length)
367 SIM_DESC sd ATTRIBUTE_UNUSED;
369 unsigned char *memory;
370 int length ATTRIBUTE_UNUSED;
376 state->Cpsr = frommem (state, memory);
377 ARMul_CPSRAltered (state);
380 ARMul_SetReg (state, state->Mode, rn, frommem (state, memory));
385 sim_fetch_register (sd, rn, memory, length)
386 SIM_DESC sd ATTRIBUTE_UNUSED;
388 unsigned char *memory;
389 int length ATTRIBUTE_UNUSED;
396 regval = ARMul_GetReg (state, state->Mode, rn);
398 /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h. */
399 regval = ARMul_GetCPSR (state);
401 /* FIXME: should report an error. */
406 tomem (state, memory, regval);
417 sim_open (kind, ptr, abfd, argv)
424 if (myname) free (myname);
425 myname = (char *) xstrdup (argv[0]);
428 /* Decide upon the endian-ness of the processor.
429 If we can, get the information from the bfd itself.
430 Otherwise look to see if we have been given a command
431 line switch that tells us. Otherwise default to little endian. */
433 big_endian = bfd_big_endian (abfd);
434 else if (argv[1] != NULL)
438 /* Scan for endian-ness switch. */
439 for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
440 if (argv[i][0] == '-' && argv[i][1] == 'E')
444 if ((c = argv[i][2]) == 0)
453 sim_callback->printf_filtered
454 (sim_callback, "No argument to -E option provided\n");
468 sim_callback->printf_filtered
469 (sim_callback, "Unrecognised argument to -E option\n");
479 sim_close (sd, quitting)
480 SIM_DESC sd ATTRIBUTE_UNUSED;
481 int quitting ATTRIBUTE_UNUSED;
489 sim_load (sd, prog, abfd, from_tty)
493 int from_tty ATTRIBUTE_UNUSED;
497 prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd,
498 sim_kind == SIM_OPEN_DEBUG, 0, sim_write);
499 if (prog_bfd == NULL)
501 ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
503 bfd_close (prog_bfd);
508 sim_stop_reason (sd, reason, sigrc)
509 SIM_DESC sd ATTRIBUTE_UNUSED;
510 enum sim_stop *reason;
515 *reason = sim_stopped;
518 else if (state->EndCondition == 0)
520 *reason = sim_exited;
521 *sigrc = state->Reg[0] & 255;
525 *reason = sim_stopped;
526 if (state->EndCondition == RDIError_BreakpointReached)
534 sim_do_command (sd, cmd)
535 SIM_DESC sd ATTRIBUTE_UNUSED;
536 char *cmd ATTRIBUTE_UNUSED;
538 (*sim_callback->printf_filtered)
540 "This simulator does not accept any commands.\n");
544 sim_set_callbacks (ptr)