1 /* Simulator memory option handling.
2 Copyright (C) 1996-1999, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Support.
6 This file is part of GDB, the GNU debugger.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "sim-assert.h"
25 #include "sim-options.h"
43 #ifdef HAVE_SYS_MMAN_H
46 #ifdef HAVE_SYS_STAT_H
53 /* Memory fill byte. */
54 static unsigned8 fill_byte_value;
55 static int fill_byte_flag = 0;
57 /* Memory mapping; see OPTION_MEMORY_MAPFILE. */
58 static int mmap_next_fd = -1;
60 /* Memory command line options. */
63 OPTION_MEMORY_DELETE = OPTION_START,
70 OPTION_MEMORY_MAPFILE,
74 static DECLARE_OPTION_HANDLER (memory_option_handler);
76 static const OPTION memory_options[] =
78 { {"memory-delete", required_argument, NULL, OPTION_MEMORY_DELETE },
79 '\0', "ADDRESS|all", "Delete memory at ADDRESS (all addresses)",
80 memory_option_handler },
81 { {"delete-memory", required_argument, NULL, OPTION_MEMORY_DELETE },
82 '\0', "ADDRESS", NULL,
83 memory_option_handler },
85 { {"memory-region", required_argument, NULL, OPTION_MEMORY_REGION },
86 '\0', "ADDRESS,SIZE[,MODULO]", "Add a memory region",
87 memory_option_handler },
89 { {"memory-alias", required_argument, NULL, OPTION_MEMORY_ALIAS },
90 '\0', "ADDRESS,SIZE{,ADDRESS}", "Add memory shadow",
91 memory_option_handler },
93 { {"memory-size", required_argument, NULL, OPTION_MEMORY_SIZE },
94 '\0', "<size>[in bytes, Kb (k suffix), Mb (m suffix) or Gb (g suffix)]",
95 "Add memory at address zero", memory_option_handler },
97 { {"memory-fill", required_argument, NULL, OPTION_MEMORY_FILL },
98 '\0', "VALUE", "Fill subsequently added memory regions",
99 memory_option_handler },
101 { {"memory-clear", no_argument, NULL, OPTION_MEMORY_CLEAR },
102 '\0', NULL, "Clear subsequently added memory regions",
103 memory_option_handler },
105 #if defined(HAVE_MMAP) && defined(HAVE_MUNMAP)
106 { {"memory-mapfile", required_argument, NULL, OPTION_MEMORY_MAPFILE },
107 '\0', "FILE", "Memory-map next memory region from file",
108 memory_option_handler },
111 { {"memory-info", no_argument, NULL, OPTION_MEMORY_INFO },
112 '\0', NULL, "List configurable memory regions",
113 memory_option_handler },
114 { {"info-memory", no_argument, NULL, OPTION_MEMORY_INFO },
116 memory_option_handler },
117 { {"map-info", no_argument, NULL, OPTION_MAP_INFO },
118 '\0', NULL, "List mapped regions",
119 memory_option_handler },
121 { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
126 do_memopt_add (SIM_DESC sd,
130 address_word nr_bytes,
136 unsigned fill_length;
138 unsigned long free_length;
142 /* Buffer already given. sim_memory_uninstall will free it. */
143 sim_core_attach (sd, NULL,
144 level, access_read_write_exec, space,
145 addr, nr_bytes, modulo, NULL, buffer);
147 free_buffer = buffer;
149 fill_buffer = buffer;
150 fill_length = (modulo == 0) ? nr_bytes : modulo;
154 /* Allocate new well-aligned buffer, just as sim_core_attach(). */
155 void *aligned_buffer;
156 int padding = (addr % sizeof (unsigned64));
157 unsigned long bytes = (modulo == 0 ? nr_bytes : modulo) + padding;
163 /* Memory map or malloc(). */
164 if (mmap_next_fd >= 0)
166 /* Check that given file is big enough. */
170 /* Some kernels will SIGBUS the application if mmap'd file
171 is not large enough. */
172 rc = fstat (mmap_next_fd, &s);
173 if (rc < 0 || s.st_size < bytes)
176 "Error, cannot confirm that mmap file is large enough "
177 "(>= %ld bytes)\n", bytes);
180 free_buffer = mmap (0, bytes, PROT_READ|PROT_WRITE, MAP_SHARED, mmap_next_fd, 0);
181 if (free_buffer == 0 || free_buffer == (char*)-1) /* MAP_FAILED */
183 sim_io_error (sd, "Error, cannot mmap file (%s).\n",
189 /* Need heap allocation? */
190 if (free_buffer == NULL)
192 /* If filling with non-zero value, do not use clearing allocator. */
193 if (fill_byte_flag && fill_byte_value != 0)
194 free_buffer = xmalloc (bytes); /* don't clear */
196 free_buffer = zalloc (bytes); /* clear */
199 aligned_buffer = (char*) free_buffer + padding;
201 sim_core_attach (sd, NULL,
202 level, access_read_write_exec, space,
203 addr, nr_bytes, modulo, NULL, aligned_buffer);
205 fill_buffer = aligned_buffer;
206 fill_length = (modulo == 0) ? nr_bytes : modulo;
208 /* If we just used a clearing allocator, and are about to fill with
209 zero, truncate the redundant fill operation. */
211 if (fill_byte_flag && fill_byte_value == 0)
212 fill_length = 1; /* avoid boundary length=0 case */
217 ASSERT (fill_buffer != 0);
218 memset ((char*) fill_buffer, fill_byte_value, fill_length);
221 while ((*entry) != NULL)
222 entry = &(*entry)->next;
223 (*entry) = ZALLOC (sim_memopt);
224 (*entry)->level = level;
225 (*entry)->space = space;
226 (*entry)->addr = addr;
227 (*entry)->nr_bytes = nr_bytes;
228 (*entry)->modulo = modulo;
229 (*entry)->buffer = free_buffer;
231 /* Record memory unmapping info. */
232 if (mmap_next_fd >= 0)
234 (*entry)->munmap_length = free_length;
235 close (mmap_next_fd);
239 (*entry)->munmap_length = 0;
245 do_memopt_delete (SIM_DESC sd,
250 sim_memopt **entry = &STATE_MEMOPT (sd);
252 while ((*entry) != NULL
253 && ((*entry)->level != level
254 || (*entry)->space != space
255 || (*entry)->addr != addr))
256 entry = &(*entry)->next;
257 if ((*entry) == NULL)
259 sim_io_eprintf (sd, "Memory at 0x%lx not found, not deleted\n",
263 /* delete any buffer */
264 if ((*entry)->buffer != NULL)
267 if ((*entry)->munmap_length > 0)
268 munmap ((*entry)->buffer, (*entry)->munmap_length);
271 zfree ((*entry)->buffer);
274 /* delete it and its aliases */
276 *entry = (*entry)->next;
277 while (alias != NULL)
279 sim_memopt *dead = alias;
280 alias = alias->alias;
281 sim_core_detach (sd, NULL, dead->level, dead->space, dead->addr);
289 parse_size (char *chp,
290 address_word *nr_bytes,
293 /* <nr_bytes>[K|M|G] [ "%" <modulo> ] */
294 *nr_bytes = strtoul (chp, &chp, 0);
298 *modulo = strtoul (chp + 1, &chp, 0);
300 case 'g': case 'G': /* Gigabyte suffix. */
303 case 'm': case 'M': /* Megabyte suffix. */
306 case 'k': case 'K': /* Kilobyte suffix. */
308 /* Check for a modulo specifier after the suffix. */
310 if (* chp == 'b' || * chp == 'B')
313 *modulo = strtoul (chp + 1, &chp, 0);
320 parse_ulong_value (char *chp,
321 unsigned long *value)
323 *value = strtoul (chp, &chp, 0);
328 parse_addr (char *chp,
333 /* [ <space> ": " ] <addr> [ "@" <level> ] */
334 *addr = (unsigned long) strtoul (chp, &chp, 0);
338 *addr = (unsigned long) strtoul (chp + 1, &chp, 0);
342 *level = strtoul (chp + 1, &chp, 0);
349 memory_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
350 char *arg, int is_command)
355 case OPTION_MEMORY_DELETE:
356 if (strcasecmp (arg, "all") == 0)
358 while (STATE_MEMOPT (sd) != NULL)
359 do_memopt_delete (sd,
360 STATE_MEMOPT (sd)->level,
361 STATE_MEMOPT (sd)->space,
362 STATE_MEMOPT (sd)->addr);
369 address_word addr = 0;
370 parse_addr (arg, &level, &space, &addr);
371 return do_memopt_delete (sd, level, space, addr);
374 case OPTION_MEMORY_REGION:
379 address_word addr = 0;
380 address_word nr_bytes = 0;
382 /* parse the arguments */
383 chp = parse_addr (chp, &level, &space, &addr);
386 sim_io_eprintf (sd, "Missing size for memory-region\n");
389 chp = parse_size (chp + 1, &nr_bytes, &modulo);
392 modulo = strtoul (chp + 1, &chp, 0);
393 /* try to attach/insert it */
394 do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
395 &STATE_MEMOPT (sd), NULL);
399 case OPTION_MEMORY_ALIAS:
404 address_word addr = 0;
405 address_word nr_bytes = 0;
408 /* parse the arguments */
409 chp = parse_addr (chp, &level, &space, &addr);
412 sim_io_eprintf (sd, "Missing size for memory-region\n");
415 chp = parse_size (chp + 1, &nr_bytes, &modulo);
416 /* try to attach/insert the main record */
417 entry = do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
420 /* now attach all the aliases */
425 address_word a_addr = addr;
426 chp = parse_addr (chp + 1, &a_level, &a_space, &a_addr);
427 do_memopt_add (sd, a_level, a_space, a_addr, nr_bytes, modulo,
428 &entry->alias, entry->buffer);
433 case OPTION_MEMORY_SIZE:
437 address_word addr = 0;
438 address_word nr_bytes = 0;
440 /* parse the arguments */
441 parse_size (arg, &nr_bytes, &modulo);
442 /* try to attach/insert it */
443 do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
444 &STATE_MEMOPT (sd), NULL);
448 case OPTION_MEMORY_CLEAR:
450 fill_byte_value = (unsigned8) 0;
456 case OPTION_MEMORY_FILL:
458 unsigned long fill_value;
459 parse_ulong_value (arg, &fill_value);
460 if (fill_value > 255)
462 sim_io_eprintf (sd, "Missing fill value between 0 and 255\n");
465 fill_byte_value = (unsigned8) fill_value;
471 case OPTION_MEMORY_MAPFILE:
473 if (mmap_next_fd >= 0)
475 sim_io_eprintf (sd, "Duplicate memory-mapfile option\n");
479 mmap_next_fd = open (arg, O_RDWR);
480 if (mmap_next_fd < 0)
482 sim_io_eprintf (sd, "Cannot open file `%s': %s\n",
483 arg, strerror(errno));
490 case OPTION_MEMORY_INFO:
493 sim_io_printf (sd, "Memory maps:\n");
494 for (entry = STATE_MEMOPT (sd); entry != NULL; entry = entry->next)
497 sim_io_printf (sd, " memory");
498 if (entry->alias == NULL)
499 sim_io_printf (sd, " region ");
501 sim_io_printf (sd, " alias ");
502 if (entry->space != 0)
503 sim_io_printf (sd, "0x%lx:", (long) entry->space);
504 sim_io_printf (sd, "0x%08lx", (long) entry->addr);
505 if (entry->level != 0)
506 sim_io_printf (sd, "@0x%lx", (long) entry->level);
507 sim_io_printf (sd, ",0x%lx",
508 (long) entry->nr_bytes);
509 if (entry->modulo != 0)
510 sim_io_printf (sd, "%%0x%lx", (long) entry->modulo);
511 for (alias = entry->alias;
515 if (alias->space != 0)
516 sim_io_printf (sd, "0x%lx:", (long) alias->space);
517 sim_io_printf (sd, ",0x%08lx", (long) alias->addr);
518 if (alias->level != 0)
519 sim_io_printf (sd, "@0x%lx", (long) alias->level);
521 sim_io_printf (sd, "\n");
527 case OPTION_MAP_INFO:
529 sim_core *memory = STATE_CORE (sd);
532 for (nr_map = 0; nr_map < nr_maps; ++nr_map)
534 sim_core_map *map = &memory->common.map[nr_map];
535 sim_core_mapping *mapping = map->first;
540 sim_io_printf (sd, "%s maps:\n", map_to_str (nr_map));
545 sim_io_printf (sd, " map ");
546 if (mapping->space != 0)
547 sim_io_printf (sd, "0x%x:", mapping->space);
548 sim_io_printf (sd, "0x%08lx", (long) mapping->base);
549 if (mapping->level != 0)
550 sim_io_printf (sd, "@0x%x", mapping->level);
551 sim_io_printf (sd, ",0x%lx", (long) mapping->nr_bytes);
552 modulo = mapping->mask + 1;
554 sim_io_printf (sd, "%%0x%x", modulo);
555 sim_io_printf (sd, "\n");
557 mapping = mapping->next;
567 sim_io_eprintf (sd, "Unknown memory option %d\n", opt);
576 /* "memory" module install handler.
578 This is called via sim_module_install to install the "memory" subsystem
579 into the simulator. */
581 static MODULE_INIT_FN sim_memory_init;
582 static MODULE_UNINSTALL_FN sim_memory_uninstall;
585 sim_memopt_install (SIM_DESC sd)
587 SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
588 sim_add_option_table (sd, NULL, memory_options);
589 sim_module_add_uninstall_fn (sd, sim_memory_uninstall);
590 sim_module_add_init_fn (sd, sim_memory_init);
595 /* Uninstall the "memory" subsystem from the simulator. */
598 sim_memory_uninstall (SIM_DESC sd)
600 sim_memopt **entry = &STATE_MEMOPT (sd);
603 while ((*entry) != NULL)
605 /* delete any buffer */
606 if ((*entry)->buffer != NULL)
609 if ((*entry)->munmap_length > 0)
610 munmap ((*entry)->buffer, (*entry)->munmap_length);
613 zfree ((*entry)->buffer);
616 /* delete it and its aliases */
620 *entry = (*entry)->next;
622 while (alias != NULL)
624 sim_memopt *dead = alias;
625 alias = alias->alias;
626 sim_core_detach (sd, NULL, dead->level, dead->space, dead->addr);
634 sim_memory_init (SIM_DESC sd)
636 /* Reinitialize option modifier flags, in case they were left
637 over from a previous sim startup event. */