1 /* Target description support for GDB.
3 Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 Contributed by CodeSourcery.
7 This file is part of GDB.
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
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #ifndef TARGET_DESCRIPTIONS_H
23 #define TARGET_DESCRIPTIONS_H 1
26 struct tdesc_arch_data;
32 /* Fetch the current target's description, and switch the current
33 architecture to one which incorporates that description. */
35 void target_find_description (void);
37 /* Discard any description fetched from the current target, and switch
38 the current architecture to one with no target description. */
40 void target_clear_description (void);
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. */
46 const struct target_desc *target_current_description (void);
48 /* Record architecture-specific functions to call for pseudo-register
49 support. If tdesc_use_registers is called and gdbarch_num_pseudo_regs
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. */
54 void set_tdesc_pseudo_register_name
55 (struct gdbarch *gdbarch, gdbarch_register_name_ftype *pseudo_name);
57 void set_tdesc_pseudo_register_type
58 (struct gdbarch *gdbarch, gdbarch_register_type_ftype *pseudo_type);
60 void set_tdesc_pseudo_register_reggroup_p
61 (struct gdbarch *gdbarch,
62 gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p);
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.
69 Fixed register assignments are taken from EARLY_DATA, which is freed.
70 All registers which have not been assigned fixed numbers are given
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
75 successfully validating the required registers. */
77 void tdesc_use_registers (struct gdbarch *gdbarch,
78 const struct target_desc *target_desc,
79 struct tdesc_arch_data *early_data);
81 /* Allocate initial data for validation of a target description during
82 gdbarch initialization. */
84 struct tdesc_arch_data *tdesc_data_alloc (void);
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. */
90 void tdesc_data_cleanup (void *data_untyped);
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,
97 int tdesc_numbered_register (const struct tdesc_feature *feature,
98 struct tdesc_arch_data *data,
99 int regno, const char *name);
101 /* Search FEATURE for a register named NAME, but do not assign a fixed
102 register number to it. */
104 int tdesc_unnumbered_register (const struct tdesc_feature *feature,
107 /* Search FEATURE for a register named NAME, and return its size in
108 bits. The register must exist. */
110 int tdesc_register_size (const struct tdesc_feature *feature,
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
119 int tdesc_numbered_register_choices (const struct tdesc_feature *feature,
120 struct tdesc_arch_data *data,
121 int regno, const char *const names[]);
124 /* Accessors for target descriptions. */
126 /* Return the BFD architecture associated with this target
127 description, or NULL if no architecture was specified. */
129 const struct bfd_arch_info *tdesc_architecture
130 (const struct target_desc *);
132 /* Return the OSABI associated with this target description, or
133 GDB_OSABI_UNKNOWN if no osabi was specified. */
135 enum gdb_osabi tdesc_osabi (const struct target_desc *);
137 /* Return non-zero if this target description is compatible
138 with the given BFD architecture. */
140 int tdesc_compatible_p (const struct target_desc *,
141 const struct bfd_arch_info *);
143 /* Return the string value of a property named KEY, or NULL if the
144 property was not specified. */
146 const char *tdesc_property (const struct target_desc *,
149 /* Return 1 if this target description describes any registers. */
151 int tdesc_has_registers (const struct target_desc *);
153 /* Return the feature with the given name, if present, or NULL if
154 the named feature is not found. */
156 const struct tdesc_feature *tdesc_find_feature (const struct target_desc *,
159 /* Return the name of FEATURE. */
161 const char *tdesc_feature_name (const struct tdesc_feature *feature);
163 /* Return the type associated with ID in the context of FEATURE, or
166 struct tdesc_type *tdesc_named_type (const struct tdesc_feature *feature,
169 /* Return the name of register REGNO, from the target description or
170 from an architecture-provided pseudo_register_name method. */
172 const char *tdesc_register_name (struct gdbarch *gdbarch, int regno);
174 /* Return the type of register REGNO, from the target description or
175 from an architecture-provided pseudo_register_type method. */
177 struct type *tdesc_register_type (struct gdbarch *gdbarch, int regno);
179 /* Check whether REGNUM is a member of REGGROUP using the target
180 description. Return -1 if the target description does not
183 int tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno,
184 struct reggroup *reggroup);
186 /* Methods for constructing a target description. */
188 struct target_desc *allocate_target_description (void);
189 struct cleanup *make_cleanup_free_target_description (struct target_desc *);
190 void set_tdesc_architecture (struct target_desc *,
191 const struct bfd_arch_info *);
192 void set_tdesc_osabi (struct target_desc *, enum gdb_osabi osabi);
193 void set_tdesc_property (struct target_desc *,
194 const char *key, const char *value);
195 void tdesc_add_compatible (struct target_desc *,
196 const struct bfd_arch_info *);
198 struct tdesc_feature *tdesc_create_feature (struct target_desc *tdesc,
200 struct tdesc_type *tdesc_create_vector (struct tdesc_feature *feature,
202 struct tdesc_type *field_type,
204 struct tdesc_type *tdesc_create_union (struct tdesc_feature *feature,
206 void tdesc_add_field (struct tdesc_type *type, const char *field_name,
207 struct tdesc_type *field_type);
208 void tdesc_create_reg (struct tdesc_feature *feature, const char *name,
209 int regnum, int save_restore, const char *group,
210 int bitsize, const char *type);
212 #endif /* TARGET_DESCRIPTIONS_H */