599 lines
15 KiB
C
599 lines
15 KiB
C
/* Simulator memory option handling.
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Copyright (C) 1996-1999, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "cconfig.h"
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#include "sim-main.h"
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#include "sim-assert.h"
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#include "sim-options.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* Memory fill byte. */
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static unsigned8 fill_byte_value;
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static int fill_byte_flag = 0;
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/* Memory mapping; see OPTION_MEMORY_MAPFILE. */
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static int mmap_next_fd = -1;
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/* Memory command line options. */
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enum {
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OPTION_MEMORY_DELETE = OPTION_START,
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OPTION_MEMORY_REGION,
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OPTION_MEMORY_SIZE,
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OPTION_MEMORY_INFO,
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OPTION_MEMORY_ALIAS,
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OPTION_MEMORY_CLEAR,
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OPTION_MEMORY_FILL,
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OPTION_MEMORY_MAPFILE
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};
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static DECLARE_OPTION_HANDLER (memory_option_handler);
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static const OPTION memory_options[] =
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{
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{ {"memory-delete", required_argument, NULL, OPTION_MEMORY_DELETE },
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'\0', "ADDRESS|all", "Delete memory at ADDRESS (all addresses)",
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memory_option_handler },
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{ {"delete-memory", required_argument, NULL, OPTION_MEMORY_DELETE },
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'\0', "ADDRESS", NULL,
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memory_option_handler },
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{ {"memory-region", required_argument, NULL, OPTION_MEMORY_REGION },
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'\0', "ADDRESS,SIZE[,MODULO]", "Add a memory region",
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memory_option_handler },
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{ {"memory-alias", required_argument, NULL, OPTION_MEMORY_ALIAS },
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'\0', "ADDRESS,SIZE{,ADDRESS}", "Add memory shadow",
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memory_option_handler },
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{ {"memory-size", required_argument, NULL, OPTION_MEMORY_SIZE },
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'\0', "<size>[in bytes, Kb (k suffix), Mb (m suffix) or Gb (g suffix)]",
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"Add memory at address zero", memory_option_handler },
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{ {"memory-fill", required_argument, NULL, OPTION_MEMORY_FILL },
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'\0', "VALUE", "Fill subsequently added memory regions",
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memory_option_handler },
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{ {"memory-clear", no_argument, NULL, OPTION_MEMORY_CLEAR },
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'\0', NULL, "Clear subsequently added memory regions",
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memory_option_handler },
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#if defined(HAVE_MMAP) && defined(HAVE_MUNMAP)
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{ {"memory-mapfile", required_argument, NULL, OPTION_MEMORY_MAPFILE },
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'\0', "FILE", "Memory-map next memory region from file",
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memory_option_handler },
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#endif
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{ {"memory-info", no_argument, NULL, OPTION_MEMORY_INFO },
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'\0', NULL, "List configurable memory regions",
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memory_option_handler },
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{ {"info-memory", no_argument, NULL, OPTION_MEMORY_INFO },
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'\0', NULL, NULL,
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memory_option_handler },
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{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
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};
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static sim_memopt *
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do_memopt_add (SIM_DESC sd,
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int level,
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int space,
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address_word addr,
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address_word nr_bytes,
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unsigned modulo,
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sim_memopt **entry,
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void *buffer)
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{
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void *fill_buffer;
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unsigned fill_length;
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void *free_buffer;
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unsigned long free_length;
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if (buffer != NULL)
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{
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/* Buffer already given. sim_memory_uninstall will free it. */
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sim_core_attach (sd, NULL,
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level, access_read_write_exec, space,
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addr, nr_bytes, modulo, NULL, buffer);
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free_buffer = buffer;
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free_length = 0;
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fill_buffer = buffer;
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fill_length = (modulo == 0) ? nr_bytes : modulo;
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}
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else
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{
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/* Allocate new well-aligned buffer, just as sim_core_attach(). */
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void *aligned_buffer;
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int padding = (addr % sizeof (unsigned64));
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unsigned long bytes = (modulo == 0 ? nr_bytes : modulo) + padding;
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free_buffer = NULL;
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free_length = bytes;
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#ifdef HAVE_MMAP
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/* Memory map or malloc(). */
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if (mmap_next_fd >= 0)
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{
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/* Check that given file is big enough. */
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struct stat s;
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int rc;
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/* Some kernels will SIGBUS the application if mmap'd file
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is not large enough. */
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rc = fstat (mmap_next_fd, &s);
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if (rc < 0 || s.st_size < bytes)
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{
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sim_io_error (sd,
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"Error, cannot confirm that mmap file is large enough "
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"(>= %ld bytes)\n", bytes);
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}
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free_buffer = mmap (0, bytes, PROT_READ|PROT_WRITE, MAP_SHARED, mmap_next_fd, 0);
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if (free_buffer == 0 || free_buffer == (char*)-1) /* MAP_FAILED */
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{
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sim_io_error (sd, "Error, cannot mmap file (%s).\n",
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strerror(errno));
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}
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}
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#endif
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/* Need heap allocation? */
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if (free_buffer == NULL)
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{
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/* If filling with non-zero value, do not use clearing allocator. */
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if (fill_byte_flag && fill_byte_value != 0)
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free_buffer = xmalloc (bytes); /* don't clear */
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else
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free_buffer = zalloc (bytes); /* clear */
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}
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aligned_buffer = (char*) free_buffer + padding;
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sim_core_attach (sd, NULL,
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level, access_read_write_exec, space,
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addr, nr_bytes, modulo, NULL, aligned_buffer);
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fill_buffer = aligned_buffer;
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fill_length = (modulo == 0) ? nr_bytes : modulo;
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/* If we just used a clearing allocator, and are about to fill with
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zero, truncate the redundant fill operation. */
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if (fill_byte_flag && fill_byte_value == 0)
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fill_length = 1; /* avoid boundary length=0 case */
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}
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if (fill_byte_flag)
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{
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ASSERT (fill_buffer != 0);
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memset ((char*) fill_buffer, fill_byte_value, fill_length);
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}
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while ((*entry) != NULL)
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entry = &(*entry)->next;
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(*entry) = ZALLOC (sim_memopt);
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(*entry)->level = level;
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(*entry)->space = space;
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(*entry)->addr = addr;
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(*entry)->nr_bytes = nr_bytes;
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(*entry)->modulo = modulo;
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(*entry)->buffer = free_buffer;
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/* Record memory unmapping info. */
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if (mmap_next_fd >= 0)
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{
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(*entry)->munmap_length = free_length;
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close (mmap_next_fd);
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mmap_next_fd = -1;
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}
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else
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(*entry)->munmap_length = 0;
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return (*entry);
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}
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static SIM_RC
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do_memopt_delete (SIM_DESC sd,
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int level,
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int space,
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address_word addr)
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{
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sim_memopt **entry = &STATE_MEMOPT (sd);
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sim_memopt *alias;
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while ((*entry) != NULL
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&& ((*entry)->level != level
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|| (*entry)->space != space
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|| (*entry)->addr != addr))
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entry = &(*entry)->next;
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if ((*entry) == NULL)
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{
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sim_io_eprintf (sd, "Memory at 0x%lx not found, not deleted\n",
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(long) addr);
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return SIM_RC_FAIL;
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}
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/* delete any buffer */
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if ((*entry)->buffer != NULL)
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{
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#ifdef HAVE_MUNMAP
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if ((*entry)->munmap_length > 0)
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munmap ((*entry)->buffer, (*entry)->munmap_length);
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else
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#endif
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zfree ((*entry)->buffer);
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}
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/* delete it and its aliases */
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alias = *entry;
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*entry = (*entry)->next;
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while (alias != NULL)
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{
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sim_memopt *dead = alias;
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alias = alias->alias;
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sim_core_detach (sd, NULL, dead->level, dead->space, dead->addr);
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zfree (dead);
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}
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return SIM_RC_OK;
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}
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static char *
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parse_size (char *chp,
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address_word *nr_bytes,
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unsigned *modulo)
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{
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/* <nr_bytes>[K|M|G] [ "%" <modulo> ] */
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*nr_bytes = strtoul (chp, &chp, 0);
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switch (*chp)
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{
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case '%':
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*modulo = strtoul (chp + 1, &chp, 0);
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break;
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case 'g': case 'G': /* Gigabyte suffix. */
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*nr_bytes <<= 10;
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/* Fall through. */
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case 'm': case 'M': /* Megabyte suffix. */
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*nr_bytes <<= 10;
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/* Fall through. */
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case 'k': case 'K': /* Kilobyte suffix. */
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*nr_bytes <<= 10;
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/* Check for a modulo specifier after the suffix. */
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++ chp;
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if (* chp == 'b' || * chp == 'B')
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++ chp;
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if (* chp == '%')
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*modulo = strtoul (chp + 1, &chp, 0);
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break;
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}
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return chp;
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}
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static char *
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parse_ulong_value (char *chp,
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unsigned long *value)
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{
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*value = strtoul (chp, &chp, 0);
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return chp;
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}
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static char *
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parse_addr (char *chp,
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int *level,
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int *space,
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address_word *addr)
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{
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/* [ <space> ": " ] <addr> [ "@" <level> ] */
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*addr = (unsigned long) strtoul (chp, &chp, 0);
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if (*chp == ':')
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{
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*space = *addr;
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*addr = (unsigned long) strtoul (chp + 1, &chp, 0);
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}
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if (*chp == '@')
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{
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*level = strtoul (chp + 1, &chp, 0);
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}
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return chp;
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}
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static SIM_RC
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memory_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
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char *arg, int is_command)
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{
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switch (opt)
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{
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case OPTION_MEMORY_DELETE:
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if (strcasecmp (arg, "all") == 0)
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{
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while (STATE_MEMOPT (sd) != NULL)
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do_memopt_delete (sd,
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STATE_MEMOPT (sd)->level,
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STATE_MEMOPT (sd)->space,
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STATE_MEMOPT (sd)->addr);
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return SIM_RC_OK;
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}
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else
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{
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int level = 0;
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int space = 0;
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address_word addr = 0;
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parse_addr (arg, &level, &space, &addr);
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return do_memopt_delete (sd, level, space, addr);
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}
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case OPTION_MEMORY_REGION:
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{
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char *chp = arg;
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int level = 0;
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int space = 0;
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address_word addr = 0;
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address_word nr_bytes = 0;
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unsigned modulo = 0;
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/* parse the arguments */
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chp = parse_addr (chp, &level, &space, &addr);
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if (*chp != ',')
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{
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sim_io_eprintf (sd, "Missing size for memory-region\n");
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return SIM_RC_FAIL;
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}
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chp = parse_size (chp + 1, &nr_bytes, &modulo);
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/* old style */
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if (*chp == ',')
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modulo = strtoul (chp + 1, &chp, 0);
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/* try to attach/insert it */
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do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
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&STATE_MEMOPT (sd), NULL);
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return SIM_RC_OK;
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}
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case OPTION_MEMORY_ALIAS:
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{
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char *chp = arg;
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int level = 0;
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int space = 0;
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address_word addr = 0;
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address_word nr_bytes = 0;
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unsigned modulo = 0;
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sim_memopt *entry;
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/* parse the arguments */
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chp = parse_addr (chp, &level, &space, &addr);
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if (*chp != ',')
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{
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sim_io_eprintf (sd, "Missing size for memory-region\n");
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return SIM_RC_FAIL;
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}
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chp = parse_size (chp + 1, &nr_bytes, &modulo);
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/* try to attach/insert the main record */
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entry = do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
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&STATE_MEMOPT (sd),
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NULL);
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/* now attach all the aliases */
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while (*chp == ',')
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{
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int a_level = level;
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int a_space = space;
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address_word a_addr = addr;
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chp = parse_addr (chp + 1, &a_level, &a_space, &a_addr);
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do_memopt_add (sd, a_level, a_space, a_addr, nr_bytes, modulo,
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&entry->alias, entry->buffer);
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}
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return SIM_RC_OK;
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}
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case OPTION_MEMORY_SIZE:
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{
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int level = 0;
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int space = 0;
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address_word addr = 0;
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address_word nr_bytes = 0;
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unsigned modulo = 0;
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/* parse the arguments */
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parse_size (arg, &nr_bytes, &modulo);
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/* try to attach/insert it */
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do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
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&STATE_MEMOPT (sd), NULL);
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return SIM_RC_OK;
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}
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case OPTION_MEMORY_CLEAR:
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{
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fill_byte_value = (unsigned8) 0;
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fill_byte_flag = 1;
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return SIM_RC_OK;
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break;
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}
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case OPTION_MEMORY_FILL:
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{
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unsigned long fill_value;
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parse_ulong_value (arg, &fill_value);
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if (fill_value > 255)
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{
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sim_io_eprintf (sd, "Missing fill value between 0 and 255\n");
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return SIM_RC_FAIL;
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}
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fill_byte_value = (unsigned8) fill_value;
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fill_byte_flag = 1;
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return SIM_RC_OK;
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break;
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}
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case OPTION_MEMORY_MAPFILE:
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{
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if (mmap_next_fd >= 0)
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{
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sim_io_eprintf (sd, "Duplicate memory-mapfile option\n");
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return SIM_RC_FAIL;
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}
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mmap_next_fd = open (arg, O_RDWR);
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if (mmap_next_fd < 0)
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{
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sim_io_eprintf (sd, "Cannot open file `%s': %s\n",
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arg, strerror(errno));
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return SIM_RC_FAIL;
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}
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return SIM_RC_OK;
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}
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case OPTION_MEMORY_INFO:
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{
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sim_memopt *entry;
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sim_io_printf (sd, "Memory maps:\n");
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for (entry = STATE_MEMOPT (sd); entry != NULL; entry = entry->next)
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{
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sim_memopt *alias;
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sim_io_printf (sd, " memory");
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if (entry->alias == NULL)
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sim_io_printf (sd, " region ");
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else
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sim_io_printf (sd, " alias ");
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if (entry->space != 0)
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sim_io_printf (sd, "0x%lx:", (long) entry->space);
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sim_io_printf (sd, "0x%08lx", (long) entry->addr);
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if (entry->level != 0)
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sim_io_printf (sd, "@0x%lx", (long) entry->level);
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sim_io_printf (sd, ",0x%lx",
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(long) entry->nr_bytes);
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if (entry->modulo != 0)
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sim_io_printf (sd, "%%0x%lx", (long) entry->modulo);
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for (alias = entry->alias;
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alias != NULL;
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alias = alias->next)
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{
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if (alias->space != 0)
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sim_io_printf (sd, "0x%lx:", (long) alias->space);
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sim_io_printf (sd, ",0x%08lx", (long) alias->addr);
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if (alias->level != 0)
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sim_io_printf (sd, "@0x%lx", (long) alias->level);
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}
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sim_io_printf (sd, "\n");
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}
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return SIM_RC_OK;
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break;
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}
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default:
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sim_io_eprintf (sd, "Unknown memory option %d\n", opt);
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return SIM_RC_FAIL;
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}
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return SIM_RC_FAIL;
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}
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/* "memory" module install handler.
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This is called via sim_module_install to install the "memory" subsystem
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into the simulator. */
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static MODULE_INIT_FN sim_memory_init;
|
|
static MODULE_UNINSTALL_FN sim_memory_uninstall;
|
|
|
|
SIM_RC
|
|
sim_memopt_install (SIM_DESC sd)
|
|
{
|
|
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
|
|
sim_add_option_table (sd, NULL, memory_options);
|
|
sim_module_add_uninstall_fn (sd, sim_memory_uninstall);
|
|
sim_module_add_init_fn (sd, sim_memory_init);
|
|
return SIM_RC_OK;
|
|
}
|
|
|
|
|
|
/* Uninstall the "memory" subsystem from the simulator. */
|
|
|
|
static void
|
|
sim_memory_uninstall (SIM_DESC sd)
|
|
{
|
|
sim_memopt **entry = &STATE_MEMOPT (sd);
|
|
sim_memopt *alias;
|
|
|
|
while ((*entry) != NULL)
|
|
{
|
|
/* delete any buffer */
|
|
if ((*entry)->buffer != NULL)
|
|
{
|
|
#ifdef HAVE_MUNMAP
|
|
if ((*entry)->munmap_length > 0)
|
|
munmap ((*entry)->buffer, (*entry)->munmap_length);
|
|
else
|
|
#endif
|
|
zfree ((*entry)->buffer);
|
|
}
|
|
|
|
/* delete it and its aliases */
|
|
alias = *entry;
|
|
|
|
/* next victim */
|
|
*entry = (*entry)->next;
|
|
|
|
while (alias != NULL)
|
|
{
|
|
sim_memopt *dead = alias;
|
|
alias = alias->alias;
|
|
sim_core_detach (sd, NULL, dead->level, dead->space, dead->addr);
|
|
zfree (dead);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static SIM_RC
|
|
sim_memory_init (SIM_DESC sd)
|
|
{
|
|
/* Reinitialize option modifier flags, in case they were left
|
|
over from a previous sim startup event. */
|
|
fill_byte_flag = 0;
|
|
mmap_next_fd = -1;
|
|
|
|
return SIM_RC_OK;
|
|
}
|