| 1 | /* Target description support for GDB. |
| 2 | |
| 3 | Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by CodeSourcery. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 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. |
| 14 | |
| 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. |
| 19 | |
| 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/>. */ |
| 22 | |
| 23 | #ifndef TARGET_DESCRIPTIONS_H |
| 24 | #define TARGET_DESCRIPTIONS_H 1 |
| 25 | |
| 26 | struct tdesc_feature; |
| 27 | struct tdesc_arch_data; |
| 28 | struct tdesc_type; |
| 29 | struct tdesc_reg; |
| 30 | struct target_desc; |
| 31 | struct target_ops; |
| 32 | |
| 33 | /* Fetch the current target's description, and switch the current |
| 34 | architecture to one which incorporates that description. */ |
| 35 | |
| 36 | void target_find_description (void); |
| 37 | |
| 38 | /* Discard any description fetched from the current target, and switch |
| 39 | the current architecture to one with no target description. */ |
| 40 | |
| 41 | void target_clear_description (void); |
| 42 | |
| 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. */ |
| 46 | |
| 47 | const struct target_desc *target_current_description (void); |
| 48 | |
| 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. */ |
| 54 | |
| 55 | void set_tdesc_pseudo_register_name |
| 56 | (struct gdbarch *gdbarch, gdbarch_register_name_ftype *pseudo_name); |
| 57 | |
| 58 | void set_tdesc_pseudo_register_type |
| 59 | (struct gdbarch *gdbarch, gdbarch_register_type_ftype *pseudo_type); |
| 60 | |
| 61 | void set_tdesc_pseudo_register_reggroup_p |
| 62 | (struct gdbarch *gdbarch, |
| 63 | gdbarch_register_reggroup_p_ftype *pseudo_reggroup_p); |
| 64 | |
| 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. |
| 69 | |
| 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. */ |
| 77 | |
| 78 | void tdesc_use_registers (struct gdbarch *gdbarch, |
| 79 | const struct target_desc *target_desc, |
| 80 | struct tdesc_arch_data *early_data); |
| 81 | |
| 82 | /* Allocate initial data for validation of a target description during |
| 83 | gdbarch initialization. */ |
| 84 | |
| 85 | struct tdesc_arch_data *tdesc_data_alloc (void); |
| 86 | |
| 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. */ |
| 90 | |
| 91 | void tdesc_data_cleanup (void *data_untyped); |
| 92 | |
| 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, |
| 96 | 0 if it was not. */ |
| 97 | |
| 98 | int tdesc_numbered_register (const struct tdesc_feature *feature, |
| 99 | struct tdesc_arch_data *data, |
| 100 | int regno, const char *name); |
| 101 | |
| 102 | /* Search FEATURE for a register named NAME, but do not assign a fixed |
| 103 | register number to it. */ |
| 104 | |
| 105 | int tdesc_unnumbered_register (const struct tdesc_feature *feature, |
| 106 | const char *name); |
| 107 | |
| 108 | /* Search FEATURE for a register named NAME, and return its size in |
| 109 | bits. The register must exist. */ |
| 110 | |
| 111 | int tdesc_register_size (const struct tdesc_feature *feature, |
| 112 | const char *name); |
| 113 | |
| 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 |
| 118 | not. */ |
| 119 | |
| 120 | int tdesc_numbered_register_choices (const struct tdesc_feature *feature, |
| 121 | struct tdesc_arch_data *data, |
| 122 | int regno, const char *const names[]); |
| 123 | |
| 124 | |
| 125 | /* Accessors for target descriptions. */ |
| 126 | |
| 127 | /* Return the BFD architecture associated with this target |
| 128 | description, or NULL if no architecture was specified. */ |
| 129 | |
| 130 | const struct bfd_arch_info *tdesc_architecture |
| 131 | (const struct target_desc *); |
| 132 | |
| 133 | /* Return the OSABI associated with this target description, or |
| 134 | GDB_OSABI_UNKNOWN if no osabi was specified. */ |
| 135 | |
| 136 | enum gdb_osabi tdesc_osabi (const struct target_desc *); |
| 137 | |
| 138 | /* Return non-zero if this target description is compatible |
| 139 | with the given BFD architecture. */ |
| 140 | |
| 141 | int tdesc_compatible_p (const struct target_desc *, |
| 142 | const struct bfd_arch_info *); |
| 143 | |
| 144 | /* Return the string value of a property named KEY, or NULL if the |
| 145 | property was not specified. */ |
| 146 | |
| 147 | const char *tdesc_property (const struct target_desc *, |
| 148 | const char *key); |
| 149 | |
| 150 | /* Return 1 if this target description describes any registers. */ |
| 151 | |
| 152 | int tdesc_has_registers (const struct target_desc *); |
| 153 | |
| 154 | /* Return the feature with the given name, if present, or NULL if |
| 155 | the named feature is not found. */ |
| 156 | |
| 157 | const struct tdesc_feature *tdesc_find_feature (const struct target_desc *, |
| 158 | const char *name); |
| 159 | |
| 160 | /* Return the name of FEATURE. */ |
| 161 | |
| 162 | const char *tdesc_feature_name (const struct tdesc_feature *feature); |
| 163 | |
| 164 | /* Return the type associated with ID in the context of FEATURE, or |
| 165 | NULL if none. */ |
| 166 | |
| 167 | struct tdesc_type *tdesc_named_type (const struct tdesc_feature *feature, |
| 168 | const char *id); |
| 169 | |
| 170 | /* Return the name of register REGNO, from the target description or |
| 171 | from an architecture-provided pseudo_register_name method. */ |
| 172 | |
| 173 | const char *tdesc_register_name (struct gdbarch *gdbarch, int regno); |
| 174 | |
| 175 | /* Return the type of register REGNO, from the target description or |
| 176 | from an architecture-provided pseudo_register_type method. */ |
| 177 | |
| 178 | struct type *tdesc_register_type (struct gdbarch *gdbarch, int regno); |
| 179 | |
| 180 | /* Return the type associated with ID, from the target description. */ |
| 181 | |
| 182 | struct type *tdesc_find_type (struct gdbarch *gdbarch, const char *id); |
| 183 | |
| 184 | /* Check whether REGNUM is a member of REGGROUP using the target |
| 185 | description. Return -1 if the target description does not |
| 186 | specify a group. */ |
| 187 | |
| 188 | int tdesc_register_in_reggroup_p (struct gdbarch *gdbarch, int regno, |
| 189 | struct reggroup *reggroup); |
| 190 | |
| 191 | /* Methods for constructing a target description. */ |
| 192 | |
| 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 *); |
| 202 | |
| 203 | struct tdesc_feature *tdesc_create_feature (struct target_desc *tdesc, |
| 204 | const char *name); |
| 205 | struct tdesc_type *tdesc_create_vector (struct tdesc_feature *feature, |
| 206 | const char *name, |
| 207 | struct tdesc_type *field_type, |
| 208 | int count); |
| 209 | struct tdesc_type *tdesc_create_struct (struct tdesc_feature *feature, |
| 210 | const char *name); |
| 211 | void tdesc_set_struct_size (struct tdesc_type *type, LONGEST size); |
| 212 | struct tdesc_type *tdesc_create_union (struct tdesc_feature *feature, |
| 213 | const char *name); |
| 214 | struct tdesc_type *tdesc_create_flags (struct tdesc_feature *feature, |
| 215 | const char *name, |
| 216 | LONGEST size); |
| 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, |
| 220 | int start, int end); |
| 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); |
| 226 | |
| 227 | #endif /* TARGET_DESCRIPTIONS_H */ |