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345 lines
8.6 KiB
C
345 lines
8.6 KiB
C
/* Register groupings for GDB, the GNU debugger.
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Copyright (C) 2002-2020 Free Software Foundation, Inc.
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Contributed by Red Hat.
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This file is part of GDB.
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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 "defs.h"
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#include "arch-utils.h"
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#include "reggroups.h"
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#include "gdbtypes.h"
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#include "regcache.h"
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#include "command.h"
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#include "gdbcmd.h" /* For maintenanceprintlist. */
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#include "gdb_obstack.h"
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/* Individual register groups. */
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struct reggroup
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{
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const char *name;
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enum reggroup_type type;
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};
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struct reggroup *
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reggroup_new (const char *name, enum reggroup_type type)
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{
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struct reggroup *group = XNEW (struct reggroup);
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group->name = name;
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group->type = type;
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return group;
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}
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/* See reggroups.h. */
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struct reggroup *
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reggroup_gdbarch_new (struct gdbarch *gdbarch, const char *name,
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enum reggroup_type type)
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{
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struct reggroup *group = GDBARCH_OBSTACK_ZALLOC (gdbarch,
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struct reggroup);
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group->name = gdbarch_obstack_strdup (gdbarch, name);
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group->type = type;
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return group;
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}
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/* Register group attributes. */
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const char *
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reggroup_name (struct reggroup *group)
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{
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return group->name;
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}
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enum reggroup_type
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reggroup_type (struct reggroup *group)
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{
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return group->type;
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}
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/* A linked list of groups for the given architecture. */
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struct reggroup_el
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{
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struct reggroup *group;
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struct reggroup_el *next;
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};
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struct reggroups
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{
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struct reggroup_el *first;
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struct reggroup_el **last;
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};
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static struct gdbarch_data *reggroups_data;
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static void *
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reggroups_init (struct obstack *obstack)
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{
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struct reggroups *groups = OBSTACK_ZALLOC (obstack, struct reggroups);
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groups->last = &groups->first;
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return groups;
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}
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/* Add a register group (with attribute values) to the pre-defined
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list. */
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static void
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add_group (struct reggroups *groups, struct reggroup *group,
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struct reggroup_el *el)
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{
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gdb_assert (group != NULL);
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el->group = group;
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el->next = NULL;
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(*groups->last) = el;
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groups->last = &el->next;
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}
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void
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reggroup_add (struct gdbarch *gdbarch, struct reggroup *group)
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{
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struct reggroups *groups
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= (struct reggroups *) gdbarch_data (gdbarch, reggroups_data);
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add_group (groups, group,
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GDBARCH_OBSTACK_ZALLOC (gdbarch, struct reggroup_el));
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}
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/* The default register groups for an architecture. */
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static struct reggroups default_groups = { NULL, &default_groups.first };
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/* A register group iterator. */
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struct reggroup *
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reggroup_next (struct gdbarch *gdbarch, struct reggroup *last)
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{
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struct reggroups *groups;
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struct reggroup_el *el;
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/* Don't allow this function to be called during architecture
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creation. If there are no groups, use the default groups list. */
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groups = (struct reggroups *) gdbarch_data (gdbarch, reggroups_data);
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gdb_assert (groups != NULL);
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if (groups->first == NULL)
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groups = &default_groups;
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/* Return the first/next reggroup. */
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if (last == NULL)
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return groups->first->group;
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for (el = groups->first; el != NULL; el = el->next)
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{
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if (el->group == last)
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{
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if (el->next != NULL)
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return el->next->group;
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else
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return NULL;
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}
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}
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return NULL;
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}
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/* See reggroups.h. */
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struct reggroup *
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reggroup_prev (struct gdbarch *gdbarch, struct reggroup *curr)
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{
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struct reggroups *groups;
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struct reggroup_el *el;
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struct reggroup *prev;
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/* Don't allow this function to be called during architecture
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creation. If there are no groups, use the default groups list. */
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groups = (struct reggroups *) gdbarch_data (gdbarch, reggroups_data);
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gdb_assert (groups != NULL);
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if (groups->first == NULL)
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groups = &default_groups;
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prev = NULL;
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for (el = groups->first; el != NULL; el = el->next)
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{
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gdb_assert (el->group != NULL);
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if (el->group == curr)
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return prev;
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prev = el->group;
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}
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if (curr == NULL)
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return prev;
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return NULL;
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}
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/* Is REGNUM a member of REGGROUP? */
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int
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default_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
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struct reggroup *group)
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{
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int vector_p;
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int float_p;
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int raw_p;
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if (gdbarch_register_name (gdbarch, regnum) == NULL
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|| *gdbarch_register_name (gdbarch, regnum) == '\0')
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return 0;
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if (group == all_reggroup)
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return 1;
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vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
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float_p = (TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT
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|| (TYPE_CODE (register_type (gdbarch, regnum))
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== TYPE_CODE_DECFLOAT));
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raw_p = regnum < gdbarch_num_regs (gdbarch);
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if (group == float_reggroup)
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return float_p;
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if (group == vector_reggroup)
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return vector_p;
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if (group == general_reggroup)
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return (!vector_p && !float_p);
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if (group == save_reggroup || group == restore_reggroup)
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return raw_p;
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return 0;
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}
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/* See reggroups.h. */
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reggroup *
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reggroup_find (struct gdbarch *gdbarch, const char *name)
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{
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struct reggroup *group;
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for (group = reggroup_next (gdbarch, NULL);
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group != NULL;
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group = reggroup_next (gdbarch, group))
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{
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if (strcmp (name, reggroup_name (group)) == 0)
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return group;
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}
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return NULL;
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}
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/* Dump out a table of register groups for the current architecture. */
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static void
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reggroups_dump (struct gdbarch *gdbarch, struct ui_file *file)
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{
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struct reggroup *group = NULL;
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do
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{
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/* Group name. */
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{
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const char *name;
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if (group == NULL)
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name = "Group";
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else
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name = reggroup_name (group);
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fprintf_unfiltered (file, " %-10s", name);
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}
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/* Group type. */
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{
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const char *type;
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if (group == NULL)
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type = "Type";
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else
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{
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switch (reggroup_type (group))
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{
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case USER_REGGROUP:
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type = "user";
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break;
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case INTERNAL_REGGROUP:
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type = "internal";
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break;
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default:
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internal_error (__FILE__, __LINE__, _("bad switch"));
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}
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}
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fprintf_unfiltered (file, " %-10s", type);
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}
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/* Note: If you change this, be sure to also update the
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documentation. */
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fprintf_unfiltered (file, "\n");
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group = reggroup_next (gdbarch, group);
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}
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while (group != NULL);
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}
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static void
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maintenance_print_reggroups (const char *args, int from_tty)
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{
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struct gdbarch *gdbarch = get_current_arch ();
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if (args == NULL)
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reggroups_dump (gdbarch, gdb_stdout);
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else
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{
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stdio_file file;
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if (!file.open (args, "w"))
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perror_with_name (_("maintenance print reggroups"));
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reggroups_dump (gdbarch, &file);
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}
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}
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/* Pre-defined register groups. */
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static struct reggroup general_group = { "general", USER_REGGROUP };
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static struct reggroup float_group = { "float", USER_REGGROUP };
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static struct reggroup system_group = { "system", USER_REGGROUP };
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static struct reggroup vector_group = { "vector", USER_REGGROUP };
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static struct reggroup all_group = { "all", USER_REGGROUP };
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static struct reggroup save_group = { "save", INTERNAL_REGGROUP };
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static struct reggroup restore_group = { "restore", INTERNAL_REGGROUP };
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struct reggroup *const general_reggroup = &general_group;
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struct reggroup *const float_reggroup = &float_group;
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struct reggroup *const system_reggroup = &system_group;
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struct reggroup *const vector_reggroup = &vector_group;
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struct reggroup *const all_reggroup = &all_group;
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struct reggroup *const save_reggroup = &save_group;
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struct reggroup *const restore_reggroup = &restore_group;
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void
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_initialize_reggroup (void)
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{
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reggroups_data = gdbarch_data_register_pre_init (reggroups_init);
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/* The pre-defined list of groups. */
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add_group (&default_groups, general_reggroup, XNEW (struct reggroup_el));
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add_group (&default_groups, float_reggroup, XNEW (struct reggroup_el));
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add_group (&default_groups, system_reggroup, XNEW (struct reggroup_el));
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add_group (&default_groups, vector_reggroup, XNEW (struct reggroup_el));
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add_group (&default_groups, all_reggroup, XNEW (struct reggroup_el));
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add_group (&default_groups, save_reggroup, XNEW (struct reggroup_el));
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add_group (&default_groups, restore_reggroup, XNEW (struct reggroup_el));
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add_cmd ("reggroups", class_maintenance,
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maintenance_print_reggroups, _("\
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Print the internal register group names.\n\
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Takes an optional file parameter."),
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&maintenanceprintlist);
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}
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