[deliverable/binutils-gdb.git] / gdb / target-descriptions.h

/* Target description support for GDB.

   Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Contributed by CodeSourcery.

   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 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   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, see <http://www.gnu.org/licenses/>.  */

#ifndef TARGET_DESCRIPTIONS_H
#define TARGET_DESCRIPTIONS_H 1

struct tdesc_feature;
struct tdesc_arch_data;
struct tdesc_type;
struct tdesc_reg;
struct target_desc;
struct target_ops;

/* Fetch the current target's description, and switch the current
   architecture to one which incorporates that description.  */

void target_find_description (void);

/* Discard any description fetched from the current target, and switch
   the current architecture to one with no target description.  */

void target_clear_description (void);

/* Return the global current target description.  This should only be
   used by gdbarch initialization code; most access should be through
   an existing gdbarch.  */

const struct target_desc *target_current_description (void);

/* Record architecture-specific functions to call for pseudo-register
   support.  If tdesc_use_registers is called and gdbarch_num_pseudo_regs
   is greater than zero, then these should be called as well.
   They are equivalent to the gdbarch methods with similar names,
   except that they will only be called for pseudo registers.  */

void set_tdesc_pseudo_register_name
  (struct gdbarch *gdbarch, gdbarch_register_name_ftype *pseudo_name);

void set_tdesc_pseudo_register_type
  (struct gdbarch *gdbarch, gdbarch_register_type_ftype *pseudo_type);

void set_tdesc_pseudo_register_reggroup_p
  (struct gdbarch *gdbarch,
   gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p);

/* Update GDBARCH to use the TARGET_DESC for registers.  TARGET_DESC
   may be GDBARCH's target description or (if GDBARCH does not have
   one which describes registers) another target description
   constructed by the gdbarch initialization routine.

   Fixed register assignments are taken from EARLY_DATA, which is freed.
   All registers which have not been assigned fixed numbers are given
   numbers above the current value of gdbarch_num_regs.
   gdbarch_num_regs and various  register-related predicates are updated to
   refer to the target description.  This function should only be called from
   the architecture's gdbarch initialization routine, and only after
   successfully validating the required registers.  */

void tdesc_use_registers (struct gdbarch *gdbarch,
			  const struct target_desc *target_desc,
			  struct tdesc_arch_data *early_data);

/* Allocate initial data for validation of a target description during
   gdbarch initialization.  */

struct tdesc_arch_data *tdesc_data_alloc (void);

/* Clean up data allocated by tdesc_data_alloc.  This should only
   be called to discard the data; tdesc_use_registers takes ownership
   of its EARLY_DATA argument.  */

void tdesc_data_cleanup (void *data_untyped);

/* Search FEATURE for a register named NAME.  Record REGNO and the
   register in DATA; when tdesc_use_registers is called, REGNO will be
   assigned to the register.  1 is returned if the register was found,
   0 if it was not.  */

int tdesc_numbered_register (const struct tdesc_feature *feature,
			     struct tdesc_arch_data *data,
			     int regno, const char *name);

/* Search FEATURE for a register named NAME, but do not assign a fixed
   register number to it.  */

int tdesc_unnumbered_register (const struct tdesc_feature *feature,
			       const char *name);

/* Search FEATURE for a register named NAME, and return its size in
   bits.  The register must exist.  */

int tdesc_register_size (const struct tdesc_feature *feature,
			 const char *name);

/* Search FEATURE for a register with any of the names from NAMES
   (NULL-terminated).  Record REGNO and the register in DATA; when
   tdesc_use_registers is called, REGNO will be assigned to the
   register.  1 is returned if the register was found, 0 if it was
   not.  */

int tdesc_numbered_register_choices (const struct tdesc_feature *feature,
				     struct tdesc_arch_data *data,
				     int regno, const char *const names[]);


/* Accessors for target descriptions.  */

/* Return the BFD architecture associated with this target
   description, or NULL if no architecture was specified.  */

const struct bfd_arch_info *tdesc_architecture
  (const struct target_desc *);

/* Return the OSABI associated with this target description, or
   GDB_OSABI_UNKNOWN if no osabi was specified.  */

enum gdb_osabi tdesc_osabi (const struct target_desc *);

/* Return non-zero if this target description is compatible
   with the given BFD architecture.  */

int tdesc_compatible_p (const struct target_desc *,
			const struct bfd_arch_info *);

/* Return the string value of a property named KEY, or NULL if the
   property was not specified.  */

const char *tdesc_property (const struct target_desc *,
			    const char *key);

/* Return 1 if this target description describes any registers.  */

int tdesc_has_registers (const struct target_desc *);

/* Return the feature with the given name, if present, or NULL if
   the named feature is not found.  */

const struct tdesc_feature *tdesc_find_feature (const struct target_desc *,
						const char *name);

/* Return the name of FEATURE.  */

const char *tdesc_feature_name (const struct tdesc_feature *feature);

/* Return the type associated with ID in the context of FEATURE, or
   NULL if none.  */

struct tdesc_type *tdesc_named_type (const struct tdesc_feature *feature,
				     const char *id);

/* Return the name of register REGNO, from the target description or
   from an architecture-provided pseudo_register_name method.  */

const char *tdesc_register_name (struct gdbarch *gdbarch, int regno);

/* Return the type of register REGNO, from the target description or
   from an architecture-provided pseudo_register_type method.  */

struct type *tdesc_register_type (struct gdbarch *gdbarch, int regno);

/* Return the type associated with ID, from the target description. */

struct type *tdesc_find_type (struct gdbarch *gdbarch, const char *id);

/* Check whether REGNUM is a member of REGGROUP using the target
   description.  Return -1 if the target description does not
   specify a group.  */

int tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno,
				  struct reggroup *reggroup);

/* Methods for constructing a target description.  */

struct target_desc *allocate_target_description (void);
struct cleanup *make_cleanup_free_target_description (struct target_desc *);
void set_tdesc_architecture (struct target_desc *,
			     const struct bfd_arch_info *);
void set_tdesc_osabi (struct target_desc *, enum gdb_osabi osabi);
void set_tdesc_property (struct target_desc *,
			 const char *key, const char *value);
void tdesc_add_compatible (struct target_desc *,
			   const struct bfd_arch_info *);

struct tdesc_feature *tdesc_create_feature (struct target_desc *tdesc,
					    const char *name);
struct tdesc_type *tdesc_create_vector (struct tdesc_feature *feature,
					const char *name,
					struct tdesc_type *field_type,
					int count);
struct tdesc_type *tdesc_create_struct (struct tdesc_feature *feature,
					const char *name);
void tdesc_set_struct_size (struct tdesc_type *type, LONGEST size);
struct tdesc_type *tdesc_create_union (struct tdesc_feature *feature,
				       const char *name);
struct tdesc_type *tdesc_create_flags (struct tdesc_feature *feature,
				       const char *name,
				       LONGEST size);
void tdesc_add_field (struct tdesc_type *type, const char *field_name,
		      struct tdesc_type *field_type);
void tdesc_add_bitfield (struct tdesc_type *type, const char *field_name,
			 int start, int end);
void tdesc_add_flag (struct tdesc_type *type, int start,
		     const char *flag_name);
void tdesc_create_reg (struct tdesc_feature *feature, const char *name,
		       int regnum, int save_restore, const char *group,
		       int bitsize, const char *type);

#endif /* TARGET_DESCRIPTIONS_H */
Commit	Line	Data
424163ea DJ	1	/* Target description support for GDB.
424163ea DJ	2
4c38e0a4	3	Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
424163ea DJ	4
	5	Contributed by CodeSourcery.
	6
	7	This file is part of GDB.
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
a9762ec7	11	the Free Software Foundation; either version 3 of the License, or
424163ea DJ	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
a9762ec7	20	along with this program. If not, see <http://www.gnu.org/licenses/>. */
424163ea DJ	21
	22	#ifndef TARGET_DESCRIPTIONS_H
	23	#define TARGET_DESCRIPTIONS_H 1
	24
123dc839 DJ	25	struct tdesc_feature;
123dc839 DJ	26	struct tdesc_arch_data;
ad068eab	27	struct tdesc_type;
123dc839	28	struct tdesc_reg;
424163ea	29	struct target_desc;
123dc839	30	struct target_ops;
424163ea DJ	31
	32	/* Fetch the current target's description, and switch the current
	33	architecture to one which incorporates that description. */
	34
	35	void target_find_description (void);
	36
	37	/* Discard any description fetched from the current target, and switch
	38	the current architecture to one with no target description. */
	39
	40	void target_clear_description (void);
	41
	42	/* Return the global current target description. This should only be
	43	used by gdbarch initialization code; most access should be through
	44	an existing gdbarch. */
	45
	46	const struct target_desc *target_current_description (void);
	47
123dc839	48	/* Record architecture-specific functions to call for pseudo-register
f57d151a	49	support. If tdesc_use_registers is called and gdbarch_num_pseudo_regs
123dc839 DJ	50	is greater than zero, then these should be called as well.
	51	They are equivalent to the gdbarch methods with similar names,
	52	except that they will only be called for pseudo registers. */
	53
	54	void set_tdesc_pseudo_register_name
	55	(struct gdbarch gdbarch, gdbarch_register_name_ftype pseudo_name);
	56
	57	void set_tdesc_pseudo_register_type
	58	(struct gdbarch gdbarch, gdbarch_register_type_ftype pseudo_type);
	59
	60	void set_tdesc_pseudo_register_reggroup_p
	61	(struct gdbarch *gdbarch,
	62	gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p);
	63
7cc46491 DJ	64	/* Update GDBARCH to use the TARGET_DESC for registers. TARGET_DESC
	65	may be GDBARCH's target description or (if GDBARCH does not have
	66	one which describes registers) another target description
	67	constructed by the gdbarch initialization routine.
	68
	69	Fixed register assignments are taken from EARLY_DATA, which is freed.
123dc839	70	All registers which have not been assigned fixed numbers are given
f57d151a UW	71	numbers above the current value of gdbarch_num_regs.
	72	gdbarch_num_regs and various register-related predicates are updated to
	73	refer to the target description. This function should only be called from
	74	the architecture's gdbarch initialization routine, and only after
123dc839 DJ	75	successfully validating the required registers. */
	76
	77	void tdesc_use_registers (struct gdbarch *gdbarch,
7cc46491	78	const struct target_desc *target_desc,
123dc839 DJ	79	struct tdesc_arch_data *early_data);
	80
	81	/* Allocate initial data for validation of a target description during
	82	gdbarch initialization. */
	83
	84	struct tdesc_arch_data *tdesc_data_alloc (void);
	85
	86	/* Clean up data allocated by tdesc_data_alloc. This should only
	87	be called to discard the data; tdesc_use_registers takes ownership
	88	of its EARLY_DATA argument. */
	89
	90	void tdesc_data_cleanup (void *data_untyped);
	91
	92	/* Search FEATURE for a register named NAME. Record REGNO and the
	93	register in DATA; when tdesc_use_registers is called, REGNO will be
	94	assigned to the register. 1 is returned if the register was found,
	95	0 if it was not. */
	96
	97	int tdesc_numbered_register (const struct tdesc_feature *feature,
	98	struct tdesc_arch_data *data,
	99	int regno, const char *name);
	100
58d6951d DJ	101	/* Search FEATURE for a register named NAME, but do not assign a fixed
	102	register number to it. */
	103
	104	int tdesc_unnumbered_register (const struct tdesc_feature *feature,
	105	const char *name);
	106
7cc46491 DJ	107	/* Search FEATURE for a register named NAME, and return its size in
	108	bits. The register must exist. */
	109
	110	int tdesc_register_size (const struct tdesc_feature *feature,
	111	const char *name);
	112
123dc839 DJ	113	/* Search FEATURE for a register with any of the names from NAMES
	114	(NULL-terminated). Record REGNO and the register in DATA; when
	115	tdesc_use_registers is called, REGNO will be assigned to the
	116	register. 1 is returned if the register was found, 0 if it was
	117	not. */
	118
	119	int tdesc_numbered_register_choices (const struct tdesc_feature *feature,
	120	struct tdesc_arch_data *data,
	121	int regno, const char *const names[]);
	122
	123
424163ea DJ	124	/* Accessors for target descriptions. */
424163ea DJ	125
23181151 DJ	126	/* Return the BFD architecture associated with this target
	127	description, or NULL if no architecture was specified. */
	128
	129	const struct bfd_arch_info *tdesc_architecture
	130	(const struct target_desc *);
	131
08d16641 PA	132	/* Return the OSABI associated with this target description, or
	133	GDB_OSABI_UNKNOWN if no osabi was specified. */
	134
	135	enum gdb_osabi tdesc_osabi (const struct target_desc *);
	136
e35359c5 UW	137	/* Return non-zero if this target description is compatible
	138	with the given BFD architecture. */
	139
	140	int tdesc_compatible_p (const struct target_desc *,
	141	const struct bfd_arch_info *);
	142
29709017 DJ	143	/* Return the string value of a property named KEY, or NULL if the
	144	property was not specified. */
	145
	146	const char tdesc_property (const struct target_desc ,
	147	const char *key);
	148
123dc839 DJ	149	/* Return 1 if this target description describes any registers. */
	150
	151	int tdesc_has_registers (const struct target_desc *);
	152
	153	/* Return the feature with the given name, if present, or NULL if
	154	the named feature is not found. */
	155
	156	const struct tdesc_feature tdesc_find_feature (const struct target_desc ,
	157	const char *name);
	158
	159	/* Return the name of FEATURE. */
	160
	161	const char tdesc_feature_name (const struct tdesc_feature feature);
	162
	163	/* Return the type associated with ID in the context of FEATURE, or
	164	NULL if none. */
	165
ad068eab UW	166	struct tdesc_type tdesc_named_type (const struct tdesc_feature feature,
ad068eab UW	167	const char *id);
123dc839	168
f8b73d13 DJ	169	/* Return the name of register REGNO, from the target description or
	170	from an architecture-provided pseudo_register_name method. */
	171
d93859e2	172	const char tdesc_register_name (struct gdbarch gdbarch, int regno);
f8b73d13	173
58d6951d DJ	174	/* Return the type of register REGNO, from the target description or
	175	from an architecture-provided pseudo_register_type method. */
	176
	177	struct type tdesc_register_type (struct gdbarch gdbarch, int regno);
	178
9fd3625f L	179	/* Return the type associated with ID, from the target description. */
	180
	181	struct type tdesc_find_type (struct gdbarch gdbarch, const char *id);
	182
f8b73d13 DJ	183	/* Check whether REGNUM is a member of REGGROUP using the target
	184	description. Return -1 if the target description does not
	185	specify a group. */
	186
	187	int tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno,
	188	struct reggroup *reggroup);
	189
424163ea DJ	190	/* Methods for constructing a target description. */
	191
	192	struct target_desc *allocate_target_description (void);
23181151 DJ	193	struct cleanup make_cleanup_free_target_description (struct target_desc );
	194	void set_tdesc_architecture (struct target_desc *,
	195	const struct bfd_arch_info *);
08d16641	196	void set_tdesc_osabi (struct target_desc *, enum gdb_osabi osabi);
29709017 DJ	197	void set_tdesc_property (struct target_desc *,
29709017 DJ	198	const char key, const char value);
e35359c5 UW	199	void tdesc_add_compatible (struct target_desc *,
e35359c5 UW	200	const struct bfd_arch_info *);
29709017	201
123dc839 DJ	202	struct tdesc_feature tdesc_create_feature (struct target_desc tdesc,
123dc839 DJ	203	const char *name);
ad068eab UW	204	struct tdesc_type tdesc_create_vector (struct tdesc_feature feature,
	205	const char *name,
	206	struct tdesc_type *field_type,
	207	int count);
f5dff777 DJ	208	struct tdesc_type tdesc_create_struct (struct tdesc_feature feature,
	209	const char *name);
	210	void tdesc_set_struct_size (struct tdesc_type *type, LONGEST size);
ad068eab UW	211	struct tdesc_type tdesc_create_union (struct tdesc_feature feature,
ad068eab UW	212	const char *name);
f5dff777 DJ	213	struct tdesc_type tdesc_create_flags (struct tdesc_feature feature,
	214	const char *name,
	215	LONGEST size);
ad068eab UW	216	void tdesc_add_field (struct tdesc_type type, const char field_name,
ad068eab UW	217	struct tdesc_type *field_type);
f5dff777 DJ	218	void tdesc_add_bitfield (struct tdesc_type type, const char field_name,
	219	int start, int end);
	220	void tdesc_add_flag (struct tdesc_type *type, int start,
	221	const char *flag_name);
123dc839 DJ	222	void tdesc_create_reg (struct tdesc_feature feature, const char name,
	223	int regnum, int save_restore, const char *group,
	224	int bitsize, const char *type);
	225
424163ea	226	#endif /* TARGET_DESCRIPTIONS_H */