1 /* Target description support for GDB.
3 Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 Contributed by CodeSourcery.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #ifndef TARGET_DESCRIPTIONS_H
24 #define TARGET_DESCRIPTIONS_H 1
27 struct tdesc_arch_data;
33 /* Fetch the current target's description, and switch the current
34 architecture to one which incorporates that description. */
36 void target_find_description (void);
38 /* Discard any description fetched from the current target, and switch
39 the current architecture to one with no target description. */
41 void target_clear_description (void);
43 /* Return the global current target description. This should only be
44 used by gdbarch initialization code; most access should be through
45 an existing gdbarch. */
47 const struct target_desc *target_current_description (void);
49 /* Record architecture-specific functions to call for pseudo-register
50 support. If tdesc_use_registers is called and gdbarch_num_pseudo_regs
51 is greater than zero, then these should be called as well.
52 They are equivalent to the gdbarch methods with similar names,
53 except that they will only be called for pseudo registers. */
55 void set_tdesc_pseudo_register_name
56 (struct gdbarch *gdbarch, gdbarch_register_name_ftype *pseudo_name);
58 void set_tdesc_pseudo_register_type
59 (struct gdbarch *gdbarch, gdbarch_register_type_ftype *pseudo_type);
61 void set_tdesc_pseudo_register_reggroup_p
62 (struct gdbarch *gdbarch,
63 gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p);
65 /* Update GDBARCH to use the TARGET_DESC for registers. TARGET_DESC
66 may be GDBARCH's target description or (if GDBARCH does not have
67 one which describes registers) another target description
68 constructed by the gdbarch initialization routine.
70 Fixed register assignments are taken from EARLY_DATA, which is freed.
71 All registers which have not been assigned fixed numbers are given
72 numbers above the current value of gdbarch_num_regs.
73 gdbarch_num_regs and various register-related predicates are updated to
74 refer to the target description. This function should only be called from
75 the architecture's gdbarch initialization routine, and only after
76 successfully validating the required registers. */
78 void tdesc_use_registers (struct gdbarch *gdbarch,
79 const struct target_desc *target_desc,
80 struct tdesc_arch_data *early_data);
82 /* Allocate initial data for validation of a target description during
83 gdbarch initialization. */
85 struct tdesc_arch_data *tdesc_data_alloc (void);
87 /* Clean up data allocated by tdesc_data_alloc. This should only
88 be called to discard the data; tdesc_use_registers takes ownership
89 of its EARLY_DATA argument. */
91 void tdesc_data_cleanup (void *data_untyped);
93 /* Search FEATURE for a register named NAME. Record REGNO and the
94 register in DATA; when tdesc_use_registers is called, REGNO will be
95 assigned to the register. 1 is returned if the register was found,
98 int tdesc_numbered_register (const struct tdesc_feature *feature,
99 struct tdesc_arch_data *data,
100 int regno, const char *name);
102 /* Search FEATURE for a register named NAME, but do not assign a fixed
103 register number to it. */
105 int tdesc_unnumbered_register (const struct tdesc_feature *feature,
108 /* Search FEATURE for a register named NAME, and return its size in
109 bits. The register must exist. */
111 int tdesc_register_size (const struct tdesc_feature *feature,
114 /* Search FEATURE for a register with any of the names from NAMES
115 (NULL-terminated). Record REGNO and the register in DATA; when
116 tdesc_use_registers is called, REGNO will be assigned to the
117 register. 1 is returned if the register was found, 0 if it was
120 int tdesc_numbered_register_choices (const struct tdesc_feature *feature,
121 struct tdesc_arch_data *data,
122 int regno, const char *const names[]);
125 /* Accessors for target descriptions. */
127 /* Return the BFD architecture associated with this target
128 description, or NULL if no architecture was specified. */
130 const struct bfd_arch_info *tdesc_architecture
131 (const struct target_desc *);
133 /* Return the OSABI associated with this target description, or
134 GDB_OSABI_UNKNOWN if no osabi was specified. */
136 enum gdb_osabi tdesc_osabi (const struct target_desc *);
138 /* Return non-zero if this target description is compatible
139 with the given BFD architecture. */
141 int tdesc_compatible_p (const struct target_desc *,
142 const struct bfd_arch_info *);
144 /* Return the string value of a property named KEY, or NULL if the
145 property was not specified. */
147 const char *tdesc_property (const struct target_desc *,
150 /* Return 1 if this target description describes any registers. */
152 int tdesc_has_registers (const struct target_desc *);
154 /* Return the feature with the given name, if present, or NULL if
155 the named feature is not found. */
157 const struct tdesc_feature *tdesc_find_feature (const struct target_desc *,
160 /* Return the name of FEATURE. */
162 const char *tdesc_feature_name (const struct tdesc_feature *feature);
164 /* Return the type associated with ID in the context of FEATURE, or
167 struct tdesc_type *tdesc_named_type (const struct tdesc_feature *feature,
170 /* Return the name of register REGNO, from the target description or
171 from an architecture-provided pseudo_register_name method. */
173 const char *tdesc_register_name (struct gdbarch *gdbarch, int regno);
175 /* Return the type of register REGNO, from the target description or
176 from an architecture-provided pseudo_register_type method. */
178 struct type *tdesc_register_type (struct gdbarch *gdbarch, int regno);
180 /* Return the type associated with ID, from the target description. */
182 struct type *tdesc_find_type (struct gdbarch *gdbarch, const char *id);
184 /* Check whether REGNUM is a member of REGGROUP using the target
185 description. Return -1 if the target description does not
188 int tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno,
189 struct reggroup *reggroup);
191 /* Methods for constructing a target description. */
193 struct target_desc *allocate_target_description (void);
194 struct cleanup *make_cleanup_free_target_description (struct target_desc *);
195 void set_tdesc_architecture (struct target_desc *,
196 const struct bfd_arch_info *);
197 void set_tdesc_osabi (struct target_desc *, enum gdb_osabi osabi);
198 void set_tdesc_property (struct target_desc *,
199 const char *key, const char *value);
200 void tdesc_add_compatible (struct target_desc *,
201 const struct bfd_arch_info *);
203 struct tdesc_feature *tdesc_create_feature (struct target_desc *tdesc,
205 struct tdesc_type *tdesc_create_vector (struct tdesc_feature *feature,
207 struct tdesc_type *field_type,
209 struct tdesc_type *tdesc_create_struct (struct tdesc_feature *feature,
211 void tdesc_set_struct_size (struct tdesc_type *type, LONGEST size);
212 struct tdesc_type *tdesc_create_union (struct tdesc_feature *feature,
214 struct tdesc_type *tdesc_create_flags (struct tdesc_feature *feature,
217 void tdesc_add_field (struct tdesc_type *type, const char *field_name,
218 struct tdesc_type *field_type);
219 void tdesc_add_bitfield (struct tdesc_type *type, const char *field_name,
221 void tdesc_add_flag (struct tdesc_type *type, int start,
222 const char *flag_name);
223 void tdesc_create_reg (struct tdesc_feature *feature, const char *name,
224 int regnum, int save_restore, const char *group,
225 int bitsize, const char *type);
227 #endif /* TARGET_DESCRIPTIONS_H */