/* Memory attributes support, for GDB.
- Copyright 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "command.h"
#include "gdbcmd.h"
#include "memattr.h"
#include "target.h"
+#include "target-dcache.h"
#include "value.h"
#include "language.h"
-#include "gdb_string.h"
+#include "vec.h"
+#include "breakpoint.h"
+#include "cli/cli-utils.h"
const struct mem_attrib default_mem_attrib =
{
MEM_WIDTH_UNSPECIFIED,
0, /* hwbreak */
0, /* cache */
- 0 /* verify */
+ 0, /* verify */
+ -1 /* Flash blocksize not specified. */
};
-static struct mem_region *mem_region_chain = NULL;
+const struct mem_attrib unknown_mem_attrib =
+{
+ MEM_NONE, /* mode */
+ MEM_WIDTH_UNSPECIFIED,
+ 0, /* hwbreak */
+ 0, /* cache */
+ 0, /* verify */
+ -1 /* Flash blocksize not specified. */
+};
+
+
+VEC(mem_region_s) *mem_region_list, *target_mem_region_list;
static int mem_number = 0;
-static struct mem_region *
+/* If this flag is set, the memory region list should be automatically
+ updated from the target. If it is clear, the list is user-controlled
+ and should be left alone. */
+static int mem_use_target = 1;
+
+/* If this flag is set, we have tried to fetch the target memory regions
+ since the last time it was invalidated. If that list is still
+ empty, then the target can't supply memory regions. */
+static int target_mem_regions_valid;
+
+/* If this flag is set, gdb will assume that memory ranges not
+ specified by the memory map have type MEM_NONE, and will
+ emit errors on all accesses to that memory. */
+static int inaccessible_by_default = 1;
+
+static void
+show_inaccessible_by_default (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ if (inaccessible_by_default)
+ fprintf_filtered (file, _("Unknown memory addresses will "
+ "be treated as inaccessible.\n"));
+ else
+ fprintf_filtered (file, _("Unknown memory addresses "
+ "will be treated as RAM.\n"));
+}
+
+
+/* Predicate function which returns true if LHS should sort before RHS
+ in a list of memory regions, useful for VEC_lower_bound. */
+
+static int
+mem_region_lessthan (const struct mem_region *lhs,
+ const struct mem_region *rhs)
+{
+ return lhs->lo < rhs->lo;
+}
+
+/* A helper function suitable for qsort, used to sort a
+ VEC(mem_region_s) by starting address. */
+
+int
+mem_region_cmp (const void *untyped_lhs, const void *untyped_rhs)
+{
+ const struct mem_region *lhs = untyped_lhs;
+ const struct mem_region *rhs = untyped_rhs;
+
+ if (lhs->lo < rhs->lo)
+ return -1;
+ else if (lhs->lo == rhs->lo)
+ return 0;
+ else
+ return 1;
+}
+
+/* Allocate a new memory region, with default settings. */
+
+void
+mem_region_init (struct mem_region *new)
+{
+ memset (new, 0, sizeof (struct mem_region));
+ new->enabled_p = 1;
+ new->attrib = default_mem_attrib;
+}
+
+/* This function should be called before any command which would
+ modify the memory region list. It will handle switching from
+ a target-provided list to a local list, if necessary. */
+
+static void
+require_user_regions (int from_tty)
+{
+ struct mem_region *m;
+ int ix, length;
+
+ /* If we're already using a user-provided list, nothing to do. */
+ if (!mem_use_target)
+ return;
+
+ /* Switch to a user-provided list (possibly a copy of the current
+ one). */
+ mem_use_target = 0;
+
+ /* If we don't have a target-provided region list yet, then
+ no need to warn. */
+ if (mem_region_list == NULL)
+ return;
+
+ /* Otherwise, let the user know how to get back. */
+ if (from_tty)
+ warning (_("Switching to manual control of memory regions; use "
+ "\"mem auto\" to fetch regions from the target again."));
+
+ /* And create a new list for the user to modify. */
+ length = VEC_length (mem_region_s, target_mem_region_list);
+ mem_region_list = VEC_alloc (mem_region_s, length);
+ for (ix = 0; VEC_iterate (mem_region_s, target_mem_region_list, ix, m); ix++)
+ VEC_quick_push (mem_region_s, mem_region_list, m);
+}
+
+/* This function should be called before any command which would
+ read the memory region list, other than those which call
+ require_user_regions. It will handle fetching the
+ target-provided list, if necessary. */
+
+static void
+require_target_regions (void)
+{
+ if (mem_use_target && !target_mem_regions_valid)
+ {
+ target_mem_regions_valid = 1;
+ target_mem_region_list = target_memory_map ();
+ mem_region_list = target_mem_region_list;
+ }
+}
+
+static void
create_mem_region (CORE_ADDR lo, CORE_ADDR hi,
const struct mem_attrib *attrib)
{
- struct mem_region *n, *new;
+ struct mem_region new;
+ int i, ix;
- /* lo == hi is a useless empty region */
+ /* lo == hi is a useless empty region. */
if (lo >= hi && hi != 0)
{
- printf_unfiltered ("invalid memory region: low >= high\n");
- return NULL;
+ printf_unfiltered (_("invalid memory region: low >= high\n"));
+ return;
}
- n = mem_region_chain;
- while (n)
+ mem_region_init (&new);
+ new.lo = lo;
+ new.hi = hi;
+
+ ix = VEC_lower_bound (mem_region_s, mem_region_list, &new,
+ mem_region_lessthan);
+
+ /* Check for an overlapping memory region. We only need to check
+ in the vicinity - at most one before and one after the
+ insertion point. */
+ for (i = ix - 1; i < ix + 1; i++)
{
- /* overlapping node */
+ struct mem_region *n;
+
+ if (i < 0)
+ continue;
+ if (i >= VEC_length (mem_region_s, mem_region_list))
+ continue;
+
+ n = VEC_index (mem_region_s, mem_region_list, i);
+
if ((lo >= n->lo && (lo < n->hi || n->hi == 0))
|| (hi > n->lo && (hi <= n->hi || n->hi == 0))
- || (lo <= n->lo && (hi >= n->hi || hi == 0)))
+ || (lo <= n->lo && ((hi >= n->hi && n->hi != 0) || hi == 0)))
{
- printf_unfiltered ("overlapping memory region\n");
- return NULL;
+ printf_unfiltered (_("overlapping memory region\n"));
+ return;
}
- n = n->next;
}
- new = xmalloc (sizeof (struct mem_region));
- new->lo = lo;
- new->hi = hi;
- new->number = ++mem_number;
- new->enabled_p = 1;
- new->attrib = *attrib;
-
- /* link in new node */
- new->next = mem_region_chain;
- mem_region_chain = new;
-
- return new;
-}
-
-static void
-delete_mem_region (struct mem_region *m)
-{
- xfree (m);
+ new.number = ++mem_number;
+ new.attrib = *attrib;
+ VEC_safe_insert (mem_region_s, mem_region_list, ix, &new);
}
/*
struct mem_region *m;
CORE_ADDR lo;
CORE_ADDR hi;
+ int ix;
+
+ require_target_regions ();
/* First we initialize LO and HI so that they describe the entire
memory space. As we process the memory region chain, they are
redefined to describe the minimal region containing ADDR. LO
and HI are used in the case where no memory region is defined
that contains ADDR. If a memory region is disabled, it is
- treated as if it does not exist. */
-
- lo = (CORE_ADDR) 0;
- hi = (CORE_ADDR) ~ 0;
-
- for (m = mem_region_chain; m; m = m->next)
+ treated as if it does not exist. The initial values for LO
+ and HI represent the bottom and top of memory. */
+
+ lo = 0;
+ hi = 0;
+
+ /* Either find memory range containing ADDRESS, or set LO and HI
+ to the nearest boundaries of an existing memory range.
+
+ If we ever want to support a huge list of memory regions, this
+ check should be replaced with a binary search (probably using
+ VEC_lower_bound). */
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
{
if (m->enabled_p == 1)
{
+ /* If the address is in the memory region, return that
+ memory range. */
if (addr >= m->lo && (addr < m->hi || m->hi == 0))
return m;
+ /* This (correctly) won't match if m->hi == 0, representing
+ the top of the address space, because CORE_ADDR is unsigned;
+ no value of LO is less than zero. */
if (addr >= m->hi && lo < m->hi)
lo = m->hi;
- if (addr <= m->lo && hi > m->lo)
+ /* This will never set HI to zero; if we're here and ADDR
+ is at or below M, and the region starts at zero, then ADDR
+ would have been in the region. */
+ if (addr <= m->lo && (hi == 0 || hi > m->lo))
hi = m->lo;
}
}
was learned above. */
region.lo = lo;
region.hi = hi;
- region.attrib = default_mem_attrib;
+
+ /* When no memory map is defined at all, we always return
+ 'default_mem_attrib', so that we do not make all memory
+ inaccessible for targets that don't provide a memory map. */
+ if (inaccessible_by_default && !VEC_empty (mem_region_s, mem_region_list))
+ region.attrib = unknown_mem_attrib;
+ else
+ region.attrib = default_mem_attrib;
+
return ®ion;
}
+
+/* Invalidate any memory regions fetched from the target. */
+
+void
+invalidate_target_mem_regions (void)
+{
+ if (!target_mem_regions_valid)
+ return;
+
+ target_mem_regions_valid = 0;
+ VEC_free (mem_region_s, target_mem_region_list);
+ if (mem_use_target)
+ mem_region_list = NULL;
+}
+
+/* Clear memory region list. */
+
+static void
+mem_clear (void)
+{
+ VEC_free (mem_region_s, mem_region_list);
+}
\f
static void
if (!args)
error_no_arg (_("No mem"));
+ /* For "mem auto", switch back to using a target provided list. */
+ if (strcmp (args, "auto") == 0)
+ {
+ if (mem_use_target)
+ return;
+
+ if (mem_region_list != target_mem_region_list)
+ {
+ mem_clear ();
+ mem_region_list = target_mem_region_list;
+ }
+
+ mem_use_target = 1;
+ return;
+ }
+
+ require_user_regions (from_tty);
+
tok = strtok (args, " \t");
if (!tok)
error (_("no lo address"));
{
struct mem_region *m;
struct mem_attrib *attrib;
+ int ix;
- if (!mem_region_chain)
+ if (mem_use_target)
+ printf_filtered (_("Using memory regions provided by the target.\n"));
+ else
+ printf_filtered (_("Using user-defined memory regions.\n"));
+
+ require_target_regions ();
+
+ if (!mem_region_list)
{
- printf_unfiltered ("There are no memory regions defined.\n");
+ printf_unfiltered (_("There are no memory regions defined.\n"));
return;
}
printf_filtered ("Num ");
printf_filtered ("Enb ");
printf_filtered ("Low Addr ");
- if (TARGET_ADDR_BIT > 32)
+ if (gdbarch_addr_bit (target_gdbarch ()) > 32)
printf_filtered (" ");
printf_filtered ("High Addr ");
- if (TARGET_ADDR_BIT > 32)
+ if (gdbarch_addr_bit (target_gdbarch ()) > 32)
printf_filtered (" ");
printf_filtered ("Attrs ");
printf_filtered ("\n");
- for (m = mem_region_chain; m; m = m->next)
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
{
char *tmp;
+
printf_filtered ("%-3d %-3c\t",
m->number,
m->enabled_p ? 'y' : 'n');
- if (TARGET_ADDR_BIT <= 32)
- tmp = hex_string_custom ((unsigned long) m->lo, 8);
+ if (gdbarch_addr_bit (target_gdbarch ()) <= 32)
+ tmp = hex_string_custom (m->lo, 8);
else
- tmp = hex_string_custom ((unsigned long) m->lo, 16);
+ tmp = hex_string_custom (m->lo, 16);
printf_filtered ("%s ", tmp);
- if (TARGET_ADDR_BIT <= 32)
+ if (gdbarch_addr_bit (target_gdbarch ()) <= 32)
{
- if (m->hi == 0)
- tmp = "0x100000000";
- else
- tmp = hex_string_custom ((unsigned long) m->hi, 8);
+ if (m->hi == 0)
+ tmp = "0x100000000";
+ else
+ tmp = hex_string_custom (m->hi, 8);
}
else
{
- if (m->hi == 0)
- tmp = "0x10000000000000000";
- else
- tmp = hex_string_custom ((unsigned long) m->hi, 16);
+ if (m->hi == 0)
+ tmp = "0x10000000000000000";
+ else
+ tmp = hex_string_custom (m->hi, 16);
}
printf_filtered ("%s ", tmp);
case MEM_WO:
printf_filtered ("wo ");
break;
+ case MEM_FLASH:
+ printf_filtered ("flash blocksize 0x%x ", attrib->blocksize);
+ break;
}
switch (attrib->width)
}
\f
-/* Enable the memory region number NUM. */
+/* Enable the memory region number NUM. */
static void
mem_enable (int num)
{
struct mem_region *m;
+ int ix;
- for (m = mem_region_chain; m; m = m->next)
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
if (m->number == num)
{
m->enabled_p = 1;
return;
}
- printf_unfiltered ("No memory region number %d.\n", num);
+ printf_unfiltered (_("No memory region number %d.\n"), num);
}
static void
mem_enable_command (char *args, int from_tty)
{
- char *p = args;
- char *p1;
int num;
struct mem_region *m;
+ int ix;
- dcache_invalidate (target_dcache);
+ require_user_regions (from_tty);
- if (p == 0)
- {
- for (m = mem_region_chain; m; m = m->next)
+ target_dcache_invalidate ();
+
+ if (args == NULL || *args == '\0')
+ { /* Enable all mem regions. */
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
m->enabled_p = 1;
}
else
- while (*p)
- {
- p1 = p;
- while (*p1 >= '0' && *p1 <= '9')
- p1++;
- if (*p1 && *p1 != ' ' && *p1 != '\t')
- error (_("Arguments must be memory region numbers."));
-
- num = atoi (p);
- mem_enable (num);
-
- p = p1;
- while (*p == ' ' || *p == '\t')
- p++;
- }
+ {
+ struct get_number_or_range_state state;
+
+ init_number_or_range (&state, args);
+ while (!state.finished)
+ {
+ num = get_number_or_range (&state);
+ mem_enable (num);
+ }
+ }
}
\f
-/* Disable the memory region number NUM. */
+/* Disable the memory region number NUM. */
static void
mem_disable (int num)
{
struct mem_region *m;
+ int ix;
- for (m = mem_region_chain; m; m = m->next)
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
if (m->number == num)
{
m->enabled_p = 0;
return;
}
- printf_unfiltered ("No memory region number %d.\n", num);
+ printf_unfiltered (_("No memory region number %d.\n"), num);
}
static void
mem_disable_command (char *args, int from_tty)
{
- char *p = args;
- char *p1;
int num;
struct mem_region *m;
+ int ix;
- dcache_invalidate (target_dcache);
+ require_user_regions (from_tty);
- if (p == 0)
+ target_dcache_invalidate ();
+
+ if (args == NULL || *args == '\0')
{
- for (m = mem_region_chain; m; m = m->next)
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
m->enabled_p = 0;
}
else
- while (*p)
- {
- p1 = p;
- while (*p1 >= '0' && *p1 <= '9')
- p1++;
- if (*p1 && *p1 != ' ' && *p1 != '\t')
- error (_("Arguments must be memory region numbers."));
-
- num = atoi (p);
- mem_disable (num);
-
- p = p1;
- while (*p == ' ' || *p == '\t')
- p++;
- }
-}
-
-/* Clear memory region list */
-
-static void
-mem_clear (void)
-{
- struct mem_region *m;
-
- while ((m = mem_region_chain) != 0)
{
- mem_region_chain = m->next;
- delete_mem_region (m);
+ struct get_number_or_range_state state;
+
+ init_number_or_range (&state, args);
+ while (!state.finished)
+ {
+ num = get_number_or_range (&state);
+ mem_disable (num);
+ }
}
}
-/* Delete the memory region number NUM. */
+/* Delete the memory region number NUM. */
static void
mem_delete (int num)
{
- struct mem_region *m1, *m;
+ struct mem_region *m;
+ int ix;
- if (!mem_region_chain)
+ if (!mem_region_list)
{
- printf_unfiltered ("No memory region number %d.\n", num);
+ printf_unfiltered (_("No memory region number %d.\n"), num);
return;
}
- if (mem_region_chain->number == num)
+ for (ix = 0; VEC_iterate (mem_region_s, mem_region_list, ix, m); ix++)
+ if (m->number == num)
+ break;
+
+ if (m == NULL)
{
- m1 = mem_region_chain;
- mem_region_chain = m1->next;
- delete_mem_region (m1);
+ printf_unfiltered (_("No memory region number %d.\n"), num);
+ return;
}
- else
- for (m = mem_region_chain; m->next; m = m->next)
- {
- if (m->next->number == num)
- {
- m1 = m->next;
- m->next = m1->next;
- delete_mem_region (m1);
- break;
- }
- }
+
+ VEC_ordered_remove (mem_region_s, mem_region_list, ix);
}
static void
mem_delete_command (char *args, int from_tty)
{
- char *p = args;
- char *p1;
int num;
+ struct get_number_or_range_state state;
- dcache_invalidate (target_dcache);
+ require_user_regions (from_tty);
- if (p == 0)
+ target_dcache_invalidate ();
+
+ if (args == NULL || *args == '\0')
{
- if (query ("Delete all memory regions? "))
+ if (query (_("Delete all memory regions? ")))
mem_clear ();
dont_repeat ();
return;
}
- while (*p)
+ init_number_or_range (&state, args);
+ while (!state.finished)
{
- p1 = p;
- while (*p1 >= '0' && *p1 <= '9')
- p1++;
- if (*p1 && *p1 != ' ' && *p1 != '\t')
- error (_("Arguments must be memory region numbers."));
-
- num = atoi (p);
+ num = get_number_or_range (&state);
mem_delete (num);
-
- p = p1;
- while (*p == ' ' || *p == '\t')
- p++;
}
dont_repeat ();
}
+
+static void
+dummy_cmd (char *args, int from_tty)
+{
+}
\f
extern initialize_file_ftype _initialize_mem; /* -Wmissing-prototype */
+static struct cmd_list_element *mem_set_cmdlist;
+static struct cmd_list_element *mem_show_cmdlist;
+
void
_initialize_mem (void)
{
- add_com ("mem", class_vars, mem_command,
- "Define attributes for memory region.\n\
-Usage: mem <lo addr> <hi addr> [<mode> <width> <cache>], \n\
-where <mode> may be rw (read/write), ro (read-only) or wo (write-only), \n\
- <width> may be 8, 16, 32, or 64, and \n\
- <cache> may be cache or nocache");
-
- add_cmd ("mem", class_vars, mem_enable_command,
- "Enable memory region.\n\
+ add_com ("mem", class_vars, mem_command, _("\
+Define attributes for memory region or reset memory region handling to\n\
+target-based.\n\
+Usage: mem auto\n\
+ mem <lo addr> <hi addr> [<mode> <width> <cache>],\n\
+where <mode> may be rw (read/write), ro (read-only) or wo (write-only),\n\
+ <width> may be 8, 16, 32, or 64, and\n\
+ <cache> may be cache or nocache"));
+
+ add_cmd ("mem", class_vars, mem_enable_command, _("\
+Enable memory region.\n\
Arguments are the code numbers of the memory regions to enable.\n\
-Usage: enable mem <code number>\n\
-Do \"info mem\" to see current list of code numbers.", &enablelist);
+Usage: enable mem <code number>...\n\
+Do \"info mem\" to see current list of code numbers."), &enablelist);
- add_cmd ("mem", class_vars, mem_disable_command,
- "Disable memory region.\n\
+ add_cmd ("mem", class_vars, mem_disable_command, _("\
+Disable memory region.\n\
Arguments are the code numbers of the memory regions to disable.\n\
-Usage: disable mem <code number>\n\
-Do \"info mem\" to see current list of code numbers.", &disablelist);
+Usage: disable mem <code number>...\n\
+Do \"info mem\" to see current list of code numbers."), &disablelist);
- add_cmd ("mem", class_vars, mem_delete_command,
- "Delete memory region.\n\
+ add_cmd ("mem", class_vars, mem_delete_command, _("\
+Delete memory region.\n\
Arguments are the code numbers of the memory regions to delete.\n\
-Usage: delete mem <code number>\n\
-Do \"info mem\" to see current list of code numbers.", &deletelist);
+Usage: delete mem <code number>...\n\
+Do \"info mem\" to see current list of code numbers."), &deletelist);
add_info ("mem", mem_info_command,
- "Memory region attributes");
+ _("Memory region attributes"));
+
+ add_prefix_cmd ("mem", class_vars, dummy_cmd, _("\
+Memory regions settings"),
+ &mem_set_cmdlist, "set mem ",
+ 0/* allow-unknown */, &setlist);
+ add_prefix_cmd ("mem", class_vars, dummy_cmd, _("\
+Memory regions settings"),
+ &mem_show_cmdlist, "show mem ",
+ 0/* allow-unknown */, &showlist);
+
+ add_setshow_boolean_cmd ("inaccessible-by-default", no_class,
+ &inaccessible_by_default, _("\
+Set handling of unknown memory regions."), _("\
+Show handling of unknown memory regions."), _("\
+If on, and some memory map is defined, debugger will emit errors on\n\
+accesses to memory not defined in the memory map. If off, accesses to all\n\
+memory addresses will be allowed."),
+ NULL,
+ show_inaccessible_by_default,
+ &mem_set_cmdlist,
+ &mem_show_cmdlist);
}
projects / thirdparty / binutils-gdb.git / blobdiff