998 lines
28 KiB
C
998 lines
28 KiB
C
/* Target description support for GDB.
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Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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Contributed by CodeSourcery.
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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 2 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, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "arch-utils.h"
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#include "gdbcmd.h"
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#include "gdbtypes.h"
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#include "reggroups.h"
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#include "target.h"
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#include "target-descriptions.h"
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#include "vec.h"
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#include "xml-support.h"
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#include "xml-tdesc.h"
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#include "gdb_assert.h"
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#include "gdb_obstack.h"
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#include "hashtab.h"
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/* Types. */
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typedef struct property
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{
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char *key;
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char *value;
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} property_s;
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DEF_VEC_O(property_s);
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/* An individual register from a target description. */
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typedef struct tdesc_reg
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{
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/* The name of this register. In standard features, it may be
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recognized by the architecture support code, or it may be purely
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for the user. */
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char *name;
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/* The register number used by this target to refer to this
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register. This is used for remote p/P packets and to determine
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the ordering of registers in the remote g/G packets. */
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long target_regnum;
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/* If this flag is set, GDB should save and restore this register
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around calls to an inferior function. */
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int save_restore;
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/* The name of the register group containing this register, or NULL
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if the group should be automatically determined from the
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register's type. If this is "general", "float", or "vector", the
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corresponding "info" command should display this register's
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value. It can be an arbitrary string, but should be limited to
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alphanumeric characters and internal hyphens. Currently other
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strings are ignored (treated as NULL). */
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char *group;
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/* The size of the register, in bits. */
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int bitsize;
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/* The type of the register. This string corresponds to either
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a named type from the target description or a predefined
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type from GDB. */
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char *type;
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/* The target-described type corresponding to TYPE, if found. */
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struct type *gdb_type;
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} *tdesc_reg_p;
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DEF_VEC_P(tdesc_reg_p);
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/* A named type from a target description. */
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typedef struct type *type_p;
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DEF_VEC_P(type_p);
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/* A feature from a target description. Each feature is a collection
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of other elements, e.g. registers and types. */
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typedef struct tdesc_feature
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{
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/* The name of this feature. It may be recognized by the architecture
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support code. */
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char *name;
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/* The registers associated with this feature. */
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VEC(tdesc_reg_p) *registers;
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/* The types associated with this feature. */
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VEC(type_p) *types;
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} *tdesc_feature_p;
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DEF_VEC_P(tdesc_feature_p);
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/* A target description. */
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struct target_desc
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{
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/* The architecture reported by the target, if any. */
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const struct bfd_arch_info *arch;
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/* Any architecture-specific properties specified by the target. */
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VEC(property_s) *properties;
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/* The features associated with this target. */
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VEC(tdesc_feature_p) *features;
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};
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/* Per-architecture data associated with a target description. The
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target description may be shared by multiple architectures, but
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this data is private to one gdbarch. */
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struct tdesc_arch_data
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{
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/* A list of registers, indexed by GDB's internal register number.
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During initialization of the gdbarch this list is used to store
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registers which the architecture assigns a fixed register number.
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Registers which are NULL in this array, or off the end, are
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treated as zero-sized and nameless (i.e. placeholders in the
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numbering). */
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VEC(tdesc_reg_p) *registers;
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/* Functions which report the register name, type, and reggroups for
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pseudo-registers. */
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gdbarch_register_name_ftype *pseudo_register_name;
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gdbarch_register_type_ftype *pseudo_register_type;
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gdbarch_register_reggroup_p_ftype *pseudo_register_reggroup_p;
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};
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/* Global state. These variables are associated with the current
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target; if GDB adds support for multiple simultaneous targets, then
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these variables should become target-specific data. */
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/* A flag indicating that a description has already been fetched from
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the current target, so it should not be queried again. */
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static int target_desc_fetched;
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/* The description fetched from the current target, or NULL if the
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current target did not supply any description. Only valid when
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target_desc_fetched is set. Only the description initialization
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code should access this; normally, the description should be
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accessed through the gdbarch object. */
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static const struct target_desc *current_target_desc;
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/* Other global variables. */
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/* The filename to read a target description from. */
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static char *target_description_filename;
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/* A handle for architecture-specific data associated with the
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target description (see struct tdesc_arch_data). */
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static struct gdbarch_data *tdesc_data;
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/* Fetch the current target's description, and switch the current
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architecture to one which incorporates that description. */
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void
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target_find_description (void)
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{
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/* If we've already fetched a description from the target, don't do
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it again. This allows a target to fetch the description early,
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during its to_open or to_create_inferior, if it needs extra
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information about the target to initialize. */
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if (target_desc_fetched)
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return;
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/* The current architecture should not have any target description
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specified. It should have been cleared, e.g. when we
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disconnected from the previous target. */
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gdb_assert (gdbarch_target_desc (current_gdbarch) == NULL);
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/* First try to fetch an XML description from the user-specified
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file. */
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current_target_desc = NULL;
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if (target_description_filename != NULL
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&& *target_description_filename != '\0')
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current_target_desc
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= file_read_description_xml (target_description_filename);
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/* Next try to read the description from the current target using
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target objects. */
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if (current_target_desc == NULL)
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current_target_desc = target_read_description_xml (¤t_target);
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/* If that failed try a target-specific hook. */
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if (current_target_desc == NULL)
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current_target_desc = target_read_description (¤t_target);
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/* If a non-NULL description was returned, then update the current
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architecture. */
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if (current_target_desc)
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{
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struct gdbarch_info info;
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gdbarch_info_init (&info);
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info.target_desc = current_target_desc;
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if (!gdbarch_update_p (info))
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warning (_("Architecture rejected target-supplied description"));
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else
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{
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struct tdesc_arch_data *data;
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data = gdbarch_data (current_gdbarch, tdesc_data);
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if (tdesc_has_registers (current_target_desc)
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&& data->registers == NULL)
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warning (_("Target-supplied registers are not supported "
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"by the current architecture"));
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}
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}
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/* Now that we know this description is usable, record that we
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fetched it. */
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target_desc_fetched = 1;
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}
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/* Discard any description fetched from the current target, and switch
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the current architecture to one with no target description. */
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void
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target_clear_description (void)
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{
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struct gdbarch_info info;
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if (!target_desc_fetched)
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return;
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target_desc_fetched = 0;
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current_target_desc = NULL;
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gdbarch_info_init (&info);
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if (!gdbarch_update_p (info))
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internal_error (__FILE__, __LINE__,
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_("Could not remove target-supplied description"));
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}
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/* Return the global current target description. This should only be
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used by gdbarch initialization code; most access should be through
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an existing gdbarch. */
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const struct target_desc *
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target_current_description (void)
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{
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if (target_desc_fetched)
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return current_target_desc;
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return NULL;
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}
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/* Direct accessors for target descriptions. */
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/* Return the string value of a property named KEY, or NULL if the
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property was not specified. */
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const char *
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tdesc_property (const struct target_desc *target_desc, const char *key)
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{
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struct property *prop;
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int ix;
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for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop);
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ix++)
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if (strcmp (prop->key, key) == 0)
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return prop->value;
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return NULL;
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}
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/* Return the BFD architecture associated with this target
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description, or NULL if no architecture was specified. */
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const struct bfd_arch_info *
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tdesc_architecture (const struct target_desc *target_desc)
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{
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return target_desc->arch;
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}
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/* Return 1 if this target description includes any registers. */
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int
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tdesc_has_registers (const struct target_desc *target_desc)
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{
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int ix;
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struct tdesc_feature *feature;
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if (target_desc == NULL)
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return 0;
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for (ix = 0;
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VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature);
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ix++)
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if (! VEC_empty (tdesc_reg_p, feature->registers))
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return 1;
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return 0;
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}
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/* Return the feature with the given name, if present, or NULL if
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the named feature is not found. */
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const struct tdesc_feature *
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tdesc_find_feature (const struct target_desc *target_desc,
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const char *name)
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{
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int ix;
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struct tdesc_feature *feature;
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for (ix = 0;
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VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature);
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ix++)
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if (strcmp (feature->name, name) == 0)
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return feature;
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return NULL;
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}
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/* Return the name of FEATURE. */
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const char *
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tdesc_feature_name (const struct tdesc_feature *feature)
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{
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return feature->name;
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}
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/* Return the type associated with ID in the context of FEATURE, or
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NULL if none. */
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struct type *
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tdesc_named_type (const struct tdesc_feature *feature, const char *id)
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{
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int ix;
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struct type *gdb_type;
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/* First try target-defined types. */
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for (ix = 0; VEC_iterate (type_p, feature->types, ix, gdb_type); ix++)
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if (strcmp (TYPE_NAME (gdb_type), id) == 0)
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return gdb_type;
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/* Next try some predefined types. Note that none of these types
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depend on the current architecture; some of the builtin_type_foo
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variables are swapped based on the architecture. */
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if (strcmp (id, "int8") == 0)
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return builtin_type_int8;
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if (strcmp (id, "int16") == 0)
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return builtin_type_int16;
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if (strcmp (id, "int32") == 0)
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return builtin_type_int32;
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if (strcmp (id, "int64") == 0)
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return builtin_type_int64;
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if (strcmp (id, "uint8") == 0)
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return builtin_type_uint8;
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if (strcmp (id, "uint16") == 0)
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return builtin_type_uint16;
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if (strcmp (id, "uint32") == 0)
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return builtin_type_uint32;
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if (strcmp (id, "uint64") == 0)
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return builtin_type_uint64;
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if (strcmp (id, "ieee_single") == 0)
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return builtin_type_ieee_single;
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if (strcmp (id, "ieee_double") == 0)
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return builtin_type_ieee_double;
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if (strcmp (id, "arm_fpa_ext") == 0)
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return builtin_type_arm_ext;
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return NULL;
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}
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/* Support for registers from target descriptions. */
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/* Construct the per-gdbarch data. */
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static void *
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tdesc_data_init (struct obstack *obstack)
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{
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struct tdesc_arch_data *data;
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data = OBSTACK_ZALLOC (obstack, struct tdesc_arch_data);
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return data;
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}
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/* Similar, but for the temporary copy used during architecture
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initialization. */
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struct tdesc_arch_data *
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tdesc_data_alloc (void)
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{
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return XZALLOC (struct tdesc_arch_data);
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}
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/* Free something allocated by tdesc_data_alloc, if it is not going
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to be used (for instance if it was unsuitable for the
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architecture). */
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void
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tdesc_data_cleanup (void *data_untyped)
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{
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struct tdesc_arch_data *data = data_untyped;
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VEC_free (tdesc_reg_p, data->registers);
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xfree (data);
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}
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/* Search FEATURE for a register named NAME. */
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int
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tdesc_numbered_register (const struct tdesc_feature *feature,
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struct tdesc_arch_data *data,
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int regno, const char *name)
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{
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int ixr;
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struct tdesc_reg *reg;
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for (ixr = 0;
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VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg);
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ixr++)
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if (strcasecmp (reg->name, name) == 0)
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{
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/* Make sure the vector includes a REGNO'th element. */
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while (regno >= VEC_length (tdesc_reg_p, data->registers))
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VEC_safe_push (tdesc_reg_p, data->registers, NULL);
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VEC_replace (tdesc_reg_p, data->registers, regno, reg);
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return 1;
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}
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return 0;
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}
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/* Search FEATURE for a register whose name is in NAMES. */
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int
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tdesc_numbered_register_choices (const struct tdesc_feature *feature,
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struct tdesc_arch_data *data,
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int regno, const char *const names[])
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{
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int i;
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for (i = 0; names[i] != NULL; i++)
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if (tdesc_numbered_register (feature, data, regno, names[i]))
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return 1;
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return 0;
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}
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/* Look up a register by its GDB internal register number. */
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static struct tdesc_reg *
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tdesc_find_register (struct gdbarch *gdbarch, int regno)
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{
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struct tdesc_reg *reg;
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struct tdesc_arch_data *data;
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data = gdbarch_data (gdbarch, tdesc_data);
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if (regno < VEC_length (tdesc_reg_p, data->registers))
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return VEC_index (tdesc_reg_p, data->registers, regno);
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else
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return NULL;
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}
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/* Return the name of register REGNO, from the target description or
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from an architecture-provided pseudo_register_name method. */
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const char *
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tdesc_register_name (int regno)
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{
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struct tdesc_reg *reg = tdesc_find_register (current_gdbarch, regno);
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int num_regs = gdbarch_num_regs (current_gdbarch);
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int num_pseudo_regs = gdbarch_num_pseudo_regs (current_gdbarch);
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if (reg != NULL)
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return reg->name;
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if (regno >= num_regs && regno < num_regs + num_pseudo_regs)
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{
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struct tdesc_arch_data *data = gdbarch_data (current_gdbarch,
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tdesc_data);
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gdb_assert (data->pseudo_register_name != NULL);
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return data->pseudo_register_name (regno);
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}
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return "";
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}
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static struct type *
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tdesc_register_type (struct gdbarch *gdbarch, int regno)
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{
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struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno);
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int num_regs = gdbarch_num_regs (gdbarch);
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int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch);
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if (reg == NULL && regno >= num_regs && regno < num_regs + num_pseudo_regs)
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{
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struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data);
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gdb_assert (data->pseudo_register_type != NULL);
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return data->pseudo_register_type (gdbarch, regno);
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}
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if (reg == NULL)
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/* Return "int0_t", since "void" has a misleading size of one. */
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return builtin_type_int0;
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/* First check for a predefined or target defined type. */
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if (reg->gdb_type)
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return reg->gdb_type;
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/* Next try size-sensitive type shortcuts. */
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if (strcmp (reg->type, "float") == 0)
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{
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if (reg->bitsize == gdbarch_float_bit (gdbarch))
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return builtin_type_float;
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else if (reg->bitsize == gdbarch_double_bit (gdbarch))
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return builtin_type_double;
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else if (reg->bitsize == gdbarch_long_double_bit (gdbarch))
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return builtin_type_long_double;
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}
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else if (strcmp (reg->type, "int") == 0)
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{
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if (reg->bitsize == gdbarch_long_bit (gdbarch))
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return builtin_type_long;
|
||
else if (reg->bitsize == TARGET_CHAR_BIT)
|
||
return builtin_type_char;
|
||
else if (reg->bitsize == gdbarch_short_bit (gdbarch))
|
||
return builtin_type_short;
|
||
else if (reg->bitsize == gdbarch_int_bit (gdbarch))
|
||
return builtin_type_int;
|
||
else if (reg->bitsize == gdbarch_long_long_bit (gdbarch))
|
||
return builtin_type_long_long;
|
||
else if (reg->bitsize == gdbarch_ptr_bit (gdbarch))
|
||
/* A bit desperate by this point... */
|
||
return builtin_type_void_data_ptr;
|
||
}
|
||
else if (strcmp (reg->type, "code_ptr") == 0)
|
||
return builtin_type_void_func_ptr;
|
||
else if (strcmp (reg->type, "data_ptr") == 0)
|
||
return builtin_type_void_data_ptr;
|
||
else
|
||
internal_error (__FILE__, __LINE__,
|
||
"Register \"%s\" has an unknown type \"%s\"",
|
||
reg->name, reg->type);
|
||
|
||
warning (_("Register \"%s\" has an unsupported size (%d bits)"),
|
||
reg->name, reg->bitsize);
|
||
return builtin_type_long;
|
||
}
|
||
|
||
static int
|
||
tdesc_remote_register_number (struct gdbarch *gdbarch, int regno)
|
||
{
|
||
struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno);
|
||
|
||
if (reg != NULL)
|
||
return reg->target_regnum;
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
/* Check whether REGNUM is a member of REGGROUP. Registers from the
|
||
target description may be classified as general, float, or vector.
|
||
Unlike a gdbarch register_reggroup_p method, this function will
|
||
return -1 if it does not know; the caller should handle registers
|
||
with no specified group.
|
||
|
||
Arbitrary strings (other than "general", "float", and "vector")
|
||
from the description are not used; they cause the register to be
|
||
displayed in "info all-registers" but excluded from "info
|
||
registers" et al. The names of containing features are also not
|
||
used. This might be extended to display registers in some more
|
||
useful groupings.
|
||
|
||
The save-restore flag is also implemented here. */
|
||
|
||
int
|
||
tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno,
|
||
struct reggroup *reggroup)
|
||
{
|
||
struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno);
|
||
|
||
if (reg != NULL && reg->group != NULL)
|
||
{
|
||
int general_p = 0, float_p = 0, vector_p = 0;
|
||
|
||
if (strcmp (reg->group, "general") == 0)
|
||
general_p = 1;
|
||
else if (strcmp (reg->group, "float") == 0)
|
||
float_p = 1;
|
||
else if (strcmp (reg->group, "vector") == 0)
|
||
vector_p = 1;
|
||
|
||
if (reggroup == float_reggroup)
|
||
return float_p;
|
||
|
||
if (reggroup == vector_reggroup)
|
||
return vector_p;
|
||
|
||
if (reggroup == general_reggroup)
|
||
return general_p;
|
||
}
|
||
|
||
if (reg != NULL
|
||
&& (reggroup == save_reggroup || reggroup == restore_reggroup))
|
||
return reg->save_restore;
|
||
|
||
return -1;
|
||
}
|
||
|
||
/* Check whether REGNUM is a member of REGGROUP. Registers with no
|
||
group specified go to the default reggroup function and are handled
|
||
by type. */
|
||
|
||
static int
|
||
tdesc_register_reggroup_p (struct gdbarch *gdbarch, int regno,
|
||
struct reggroup *reggroup)
|
||
{
|
||
int num_regs = gdbarch_num_regs (gdbarch);
|
||
int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch);
|
||
int ret;
|
||
|
||
if (regno >= num_regs && regno < num_regs + num_pseudo_regs)
|
||
{
|
||
struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data);
|
||
gdb_assert (data->pseudo_register_reggroup_p != NULL);
|
||
return data->pseudo_register_reggroup_p (gdbarch, regno, reggroup);
|
||
}
|
||
|
||
ret = tdesc_register_in_reggroup_p (gdbarch, regno, reggroup);
|
||
if (ret != -1)
|
||
return ret;
|
||
|
||
return default_register_reggroup_p (gdbarch, regno, reggroup);
|
||
}
|
||
|
||
/* Record architecture-specific functions to call for pseudo-register
|
||
support. */
|
||
|
||
void
|
||
set_tdesc_pseudo_register_name (struct gdbarch *gdbarch,
|
||
gdbarch_register_name_ftype *pseudo_name)
|
||
{
|
||
struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data);
|
||
|
||
data->pseudo_register_name = pseudo_name;
|
||
}
|
||
|
||
void
|
||
set_tdesc_pseudo_register_type (struct gdbarch *gdbarch,
|
||
gdbarch_register_type_ftype *pseudo_type)
|
||
{
|
||
struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data);
|
||
|
||
data->pseudo_register_type = pseudo_type;
|
||
}
|
||
|
||
void
|
||
set_tdesc_pseudo_register_reggroup_p
|
||
(struct gdbarch *gdbarch,
|
||
gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p)
|
||
{
|
||
struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data);
|
||
|
||
data->pseudo_register_reggroup_p = pseudo_reggroup_p;
|
||
}
|
||
|
||
/* Update GDBARCH to use the target description for registers. */
|
||
|
||
void
|
||
tdesc_use_registers (struct gdbarch *gdbarch,
|
||
struct tdesc_arch_data *early_data)
|
||
{
|
||
int num_regs = gdbarch_num_regs (gdbarch);
|
||
int i, ixf, ixr;
|
||
const struct target_desc *target_desc;
|
||
struct tdesc_feature *feature;
|
||
struct tdesc_reg *reg;
|
||
struct tdesc_arch_data *data;
|
||
htab_t reg_hash;
|
||
|
||
target_desc = gdbarch_target_desc (gdbarch);
|
||
|
||
/* We can't use the description for registers if it doesn't describe
|
||
any. This function should only be called after validating
|
||
registers, so the caller should know that registers are
|
||
included. */
|
||
gdb_assert (tdesc_has_registers (target_desc));
|
||
|
||
data = gdbarch_data (gdbarch, tdesc_data);
|
||
data->registers = early_data->registers;
|
||
xfree (early_data);
|
||
|
||
/* Build up a set of all registers, so that we can assign register
|
||
numbers where needed. The hash table expands as necessary, so
|
||
the initial size is arbitrary. */
|
||
reg_hash = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL);
|
||
for (ixf = 0;
|
||
VEC_iterate (tdesc_feature_p, target_desc->features, ixf, feature);
|
||
ixf++)
|
||
for (ixr = 0;
|
||
VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg);
|
||
ixr++)
|
||
{
|
||
void **slot = htab_find_slot (reg_hash, reg, INSERT);
|
||
|
||
*slot = reg;
|
||
}
|
||
|
||
/* Remove any registers which were assigned numbers by the
|
||
architecture. */
|
||
for (ixr = 0; VEC_iterate (tdesc_reg_p, data->registers, ixr, reg); ixr++)
|
||
if (reg)
|
||
htab_remove_elt (reg_hash, reg);
|
||
|
||
/* Assign numbers to the remaining registers and add them to the
|
||
list of registers. The new numbers are always above gdbarch_num_regs.
|
||
Iterate over the features, not the hash table, so that the order
|
||
matches that in the target description. */
|
||
|
||
gdb_assert (VEC_length (tdesc_reg_p, data->registers) <= num_regs);
|
||
while (VEC_length (tdesc_reg_p, data->registers) < num_regs)
|
||
VEC_safe_push (tdesc_reg_p, data->registers, NULL);
|
||
for (ixf = 0;
|
||
VEC_iterate (tdesc_feature_p, target_desc->features, ixf, feature);
|
||
ixf++)
|
||
for (ixr = 0;
|
||
VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg);
|
||
ixr++)
|
||
if (htab_find (reg_hash, reg) != NULL)
|
||
{
|
||
VEC_safe_push (tdesc_reg_p, data->registers, reg);
|
||
num_regs++;
|
||
}
|
||
|
||
htab_delete (reg_hash);
|
||
|
||
/* Update the architecture. */
|
||
set_gdbarch_num_regs (gdbarch, num_regs);
|
||
set_gdbarch_register_name (gdbarch, tdesc_register_name);
|
||
set_gdbarch_register_type (gdbarch, tdesc_register_type);
|
||
set_gdbarch_remote_register_number (gdbarch,
|
||
tdesc_remote_register_number);
|
||
set_gdbarch_register_reggroup_p (gdbarch, tdesc_register_reggroup_p);
|
||
}
|
||
|
||
|
||
/* Methods for constructing a target description. */
|
||
|
||
static void
|
||
tdesc_free_reg (struct tdesc_reg *reg)
|
||
{
|
||
xfree (reg->name);
|
||
xfree (reg->type);
|
||
xfree (reg->group);
|
||
xfree (reg);
|
||
}
|
||
|
||
void
|
||
tdesc_create_reg (struct tdesc_feature *feature, const char *name,
|
||
int regnum, int save_restore, const char *group,
|
||
int bitsize, const char *type)
|
||
{
|
||
struct tdesc_reg *reg = XZALLOC (struct tdesc_reg);
|
||
|
||
reg->name = xstrdup (name);
|
||
reg->target_regnum = regnum;
|
||
reg->save_restore = save_restore;
|
||
reg->group = group ? xstrdup (group) : NULL;
|
||
reg->bitsize = bitsize;
|
||
reg->type = type ? xstrdup (type) : xstrdup ("<unknown>");
|
||
|
||
/* If the register's type is target-defined, look it up now. We may not
|
||
have easy access to the containing feature when we want it later. */
|
||
reg->gdb_type = tdesc_named_type (feature, reg->type);
|
||
|
||
VEC_safe_push (tdesc_reg_p, feature->registers, reg);
|
||
}
|
||
|
||
static void
|
||
tdesc_free_feature (struct tdesc_feature *feature)
|
||
{
|
||
struct tdesc_reg *reg;
|
||
int ix;
|
||
|
||
for (ix = 0; VEC_iterate (tdesc_reg_p, feature->registers, ix, reg); ix++)
|
||
tdesc_free_reg (reg);
|
||
VEC_free (tdesc_reg_p, feature->registers);
|
||
|
||
/* There is no easy way to free xmalloc-allocated types, nor is
|
||
there a way to allocate types on an obstack not associated with
|
||
an objfile. Therefore we never free types. Since we only ever
|
||
parse an identical XML document once, this memory leak is mostly
|
||
contained. */
|
||
VEC_free (type_p, feature->types);
|
||
|
||
xfree (feature->name);
|
||
xfree (feature);
|
||
}
|
||
|
||
struct tdesc_feature *
|
||
tdesc_create_feature (struct target_desc *tdesc, const char *name)
|
||
{
|
||
struct tdesc_feature *new_feature = XZALLOC (struct tdesc_feature);
|
||
|
||
new_feature->name = xstrdup (name);
|
||
|
||
VEC_safe_push (tdesc_feature_p, tdesc->features, new_feature);
|
||
return new_feature;
|
||
}
|
||
|
||
void
|
||
tdesc_record_type (struct tdesc_feature *feature, struct type *type)
|
||
{
|
||
/* The type's ID should be used as its TYPE_NAME. */
|
||
gdb_assert (TYPE_NAME (type) != NULL);
|
||
|
||
VEC_safe_push (type_p, feature->types, type);
|
||
}
|
||
|
||
struct target_desc *
|
||
allocate_target_description (void)
|
||
{
|
||
return XZALLOC (struct target_desc);
|
||
}
|
||
|
||
static void
|
||
free_target_description (void *arg)
|
||
{
|
||
struct target_desc *target_desc = arg;
|
||
struct tdesc_feature *feature;
|
||
struct property *prop;
|
||
int ix;
|
||
|
||
for (ix = 0;
|
||
VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature);
|
||
ix++)
|
||
tdesc_free_feature (feature);
|
||
VEC_free (tdesc_feature_p, target_desc->features);
|
||
|
||
for (ix = 0;
|
||
VEC_iterate (property_s, target_desc->properties, ix, prop);
|
||
ix++)
|
||
{
|
||
xfree (prop->key);
|
||
xfree (prop->value);
|
||
}
|
||
VEC_free (property_s, target_desc->properties);
|
||
|
||
xfree (target_desc);
|
||
}
|
||
|
||
struct cleanup *
|
||
make_cleanup_free_target_description (struct target_desc *target_desc)
|
||
{
|
||
return make_cleanup (free_target_description, target_desc);
|
||
}
|
||
|
||
void
|
||
set_tdesc_property (struct target_desc *target_desc,
|
||
const char *key, const char *value)
|
||
{
|
||
struct property *prop, new_prop;
|
||
int ix;
|
||
|
||
gdb_assert (key != NULL && value != NULL);
|
||
|
||
for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop);
|
||
ix++)
|
||
if (strcmp (prop->key, key) == 0)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Attempted to add duplicate property \"%s\""), key);
|
||
|
||
new_prop.key = xstrdup (key);
|
||
new_prop.value = xstrdup (value);
|
||
VEC_safe_push (property_s, target_desc->properties, &new_prop);
|
||
}
|
||
|
||
void
|
||
set_tdesc_architecture (struct target_desc *target_desc,
|
||
const struct bfd_arch_info *arch)
|
||
{
|
||
target_desc->arch = arch;
|
||
}
|
||
|
||
|
||
static struct cmd_list_element *tdesc_set_cmdlist, *tdesc_show_cmdlist;
|
||
static struct cmd_list_element *tdesc_unset_cmdlist;
|
||
|
||
/* Helper functions for the CLI commands. */
|
||
|
||
static void
|
||
set_tdesc_cmd (char *args, int from_tty)
|
||
{
|
||
help_list (tdesc_set_cmdlist, "set tdesc ", -1, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
show_tdesc_cmd (char *args, int from_tty)
|
||
{
|
||
cmd_show_list (tdesc_show_cmdlist, from_tty, "");
|
||
}
|
||
|
||
static void
|
||
unset_tdesc_cmd (char *args, int from_tty)
|
||
{
|
||
help_list (tdesc_unset_cmdlist, "unset tdesc ", -1, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
set_tdesc_filename_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
target_clear_description ();
|
||
target_find_description ();
|
||
}
|
||
|
||
static void
|
||
show_tdesc_filename_cmd (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c,
|
||
const char *value)
|
||
{
|
||
if (value != NULL && *value != '\0')
|
||
printf_filtered (_("\
|
||
The target description will be read from \"%s\".\n"),
|
||
value);
|
||
else
|
||
printf_filtered (_("\
|
||
The target description will be read from the target.\n"));
|
||
}
|
||
|
||
static void
|
||
unset_tdesc_filename_cmd (char *args, int from_tty)
|
||
{
|
||
xfree (target_description_filename);
|
||
target_description_filename = NULL;
|
||
target_clear_description ();
|
||
target_find_description ();
|
||
}
|
||
|
||
void
|
||
_initialize_target_descriptions (void)
|
||
{
|
||
tdesc_data = gdbarch_data_register_pre_init (tdesc_data_init);
|
||
|
||
add_prefix_cmd ("tdesc", class_maintenance, set_tdesc_cmd, _("\
|
||
Set target description specific variables."),
|
||
&tdesc_set_cmdlist, "set tdesc ",
|
||
0 /* allow-unknown */, &setlist);
|
||
add_prefix_cmd ("tdesc", class_maintenance, show_tdesc_cmd, _("\
|
||
Show target description specific variables."),
|
||
&tdesc_show_cmdlist, "show tdesc ",
|
||
0 /* allow-unknown */, &showlist);
|
||
add_prefix_cmd ("tdesc", class_maintenance, unset_tdesc_cmd, _("\
|
||
Unset target description specific variables."),
|
||
&tdesc_unset_cmdlist, "unset tdesc ",
|
||
0 /* allow-unknown */, &unsetlist);
|
||
|
||
add_setshow_filename_cmd ("filename", class_obscure,
|
||
&target_description_filename,
|
||
_("\
|
||
Set the file to read for an XML target description"), _("\
|
||
Show the file to read for an XML target description"), _("\
|
||
When set, GDB will read the target description from a local\n\
|
||
file instead of querying the remote target."),
|
||
set_tdesc_filename_cmd,
|
||
show_tdesc_filename_cmd,
|
||
&tdesc_set_cmdlist, &tdesc_show_cmdlist);
|
||
|
||
add_cmd ("filename", class_obscure, unset_tdesc_filename_cmd, _("\
|
||
Unset the file to read for an XML target description. When unset,\n\
|
||
GDB will read the description from the target."),
|
||
&tdesc_unset_cmdlist);
|
||
}
|