+\f
+
+/* Direct accessors for target descriptions. */
+
+/* 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 *target_desc, const char *key)
+{
+ struct property *prop;
+ int ix;
+
+ for (ix = 0; VEC_iterate (property_s, target_desc->properties, ix, prop);
+ ix++)
+ if (strcmp (prop->key, key) == 0)
+ return prop->value;
+
+ return NULL;
+}
+
+/* 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 *target_desc)
+{
+ return target_desc->arch;
+}
+\f
+
+/* Return 1 if this target description includes any registers. */
+
+int
+tdesc_has_registers (const struct target_desc *target_desc)
+{
+ int ix;
+ struct tdesc_feature *feature;
+
+ if (target_desc == NULL)
+ return 0;
+
+ for (ix = 0;
+ VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature);
+ ix++)
+ if (! VEC_empty (tdesc_reg_p, feature->registers))
+ return 1;
+
+ return 0;
+}
+
+/* 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 *target_desc,
+ const char *name)
+{
+ int ix;
+ struct tdesc_feature *feature;
+
+ for (ix = 0;
+ VEC_iterate (tdesc_feature_p, target_desc->features, ix, feature);
+ ix++)
+ if (strcmp (feature->name, name) == 0)
+ return feature;
+
+ return NULL;
+}
+
+/* Return the name of FEATURE. */
+
+const char *
+tdesc_feature_name (const struct tdesc_feature *feature)
+{
+ return feature->name;
+}
+
+/* Predefined types. Note that none of these types depend on the
+ current architecture; some of the builtin_type_foo variables are
+ swapped based on the architecture. */
+static struct
+{
+ const char *name;
+ struct type **type;
+} tdesc_predefined_types[] =
+ {
+ { "int8", &builtin_type_int8 },
+ { "int16", &builtin_type_int16 },
+ { "int32", &builtin_type_int32 },
+ { "int64", &builtin_type_int64 },
+ { "int128", &builtin_type_int128 },
+ { "uint8", &builtin_type_uint8 },
+ { "uint16", &builtin_type_uint16 },
+ { "uint32", &builtin_type_uint32 },
+ { "uint64", &builtin_type_uint64 },
+ { "uint128", &builtin_type_uint128 },
+ { "ieee_single", &builtin_type_ieee_single },
+ { "ieee_double", &builtin_type_ieee_double },
+ { "arm_fpa_ext", &builtin_type_arm_ext }
+ };
+
+/* Return the type associated with ID in the context of FEATURE, or
+ NULL if none. */
+
+struct type *
+tdesc_named_type (const struct tdesc_feature *feature, const char *id)
+{
+ int ix;
+ struct type *gdb_type;
+
+ /* First try target-defined types. */
+ for (ix = 0; VEC_iterate (type_p, feature->types, ix, gdb_type); ix++)
+ if (strcmp (TYPE_NAME (gdb_type), id) == 0)
+ return gdb_type;
+
+ /* Next try the predefined types. */
+ for (ix = 0; ix < ARRAY_SIZE (tdesc_predefined_types); ix++)
+ if (strcmp (tdesc_predefined_types[ix].name, id) == 0)
+ return *tdesc_predefined_types[ix].type;
+
+ return NULL;
+}
+\f
+
+/* Support for registers from target descriptions. */
+
+/* Construct the per-gdbarch data. */
+
+static void *
+tdesc_data_init (struct obstack *obstack)
+{
+ struct tdesc_arch_data *data;
+
+ data = OBSTACK_ZALLOC (obstack, struct tdesc_arch_data);
+ return data;
+}
+
+/* Similar, but for the temporary copy used during architecture
+ initialization. */
+
+struct tdesc_arch_data *
+tdesc_data_alloc (void)
+{
+ return XZALLOC (struct tdesc_arch_data);
+}
+
+/* Free something allocated by tdesc_data_alloc, if it is not going
+ to be used (for instance if it was unsuitable for the
+ architecture). */
+
+void
+tdesc_data_cleanup (void *data_untyped)
+{
+ struct tdesc_arch_data *data = data_untyped;
+
+ VEC_free (tdesc_reg_p, data->registers);
+ xfree (data);
+}
+
+/* Search FEATURE for a register named NAME. */
+
+static struct tdesc_reg *
+tdesc_find_register_early (const struct tdesc_feature *feature,
+ const char *name)
+{
+ int ixr;
+ struct tdesc_reg *reg;
+
+ for (ixr = 0;
+ VEC_iterate (tdesc_reg_p, feature->registers, ixr, reg);
+ ixr++)
+ if (strcasecmp (reg->name, name) == 0)
+ return reg;
+
+ return NULL;
+}
+
+/* Search FEATURE for a register named NAME. Assign REGNO to it. */
+
+int
+tdesc_numbered_register (const struct tdesc_feature *feature,
+ struct tdesc_arch_data *data,
+ int regno, const char *name)
+{
+ struct tdesc_reg *reg = tdesc_find_register_early (feature, name);
+
+ if (reg == NULL)
+ return 0;
+
+ /* Make sure the vector includes a REGNO'th element. */
+ while (regno >= VEC_length (tdesc_reg_p, data->registers))
+ VEC_safe_push (tdesc_reg_p, data->registers, NULL);
+ VEC_replace (tdesc_reg_p, data->registers, regno, reg);
+ return 1;
+}
+
+/* Search FEATURE for a register whose name is in NAMES and assign
+ REGNO to it. */
+
+int
+tdesc_numbered_register_choices (const struct tdesc_feature *feature,
+ struct tdesc_arch_data *data,
+ int regno, const char *const names[])
+{
+ int i;
+
+ for (i = 0; names[i] != NULL; i++)
+ if (tdesc_numbered_register (feature, data, regno, names[i]))
+ return 1;
+
+ return 0;
+}
+
+/* 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)
+{
+ struct tdesc_reg *reg = tdesc_find_register_early (feature, name);
+
+ gdb_assert (reg != NULL);
+ return reg->bitsize;
+}
+
+/* Look up a register by its GDB internal register number. */
+
+static struct tdesc_reg *
+tdesc_find_register (struct gdbarch *gdbarch, int regno)
+{
+ struct tdesc_reg *reg;
+ struct tdesc_arch_data *data;
+
+ data = gdbarch_data (gdbarch, tdesc_data);
+ if (regno < VEC_length (tdesc_reg_p, data->registers))
+ return VEC_index (tdesc_reg_p, data->registers, regno);
+ else
+ return NULL;
+}
+
+/* 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)
+{
+ struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno);
+ int num_regs = gdbarch_num_regs (gdbarch);
+ int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch);
+
+ if (reg != NULL)
+ return reg->name;
+
+ 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_name != NULL);
+ return data->pseudo_register_name (gdbarch, regno);
+ }
+
+ return "";
+}
+
+static struct type *
+tdesc_register_type (struct gdbarch *gdbarch, int regno)
+{
+ struct tdesc_reg *reg = tdesc_find_register (gdbarch, regno);
+ int num_regs = gdbarch_num_regs (gdbarch);
+ int num_pseudo_regs = gdbarch_num_pseudo_regs (gdbarch);
+
+ if (reg == NULL && regno >= num_regs && regno < num_regs + num_pseudo_regs)
+ {
+ struct tdesc_arch_data *data = gdbarch_data (gdbarch, tdesc_data);
+ gdb_assert (data->pseudo_register_type != NULL);
+ return data->pseudo_register_type (gdbarch, regno);
+ }
+
+ if (reg == NULL)
+ /* Return "int0_t", since "void" has a misleading size of one. */
+ return builtin_type_int0;
+
+ /* First check for a predefined or target defined type. */
+ if (reg->gdb_type)
+ return reg->gdb_type;
+
+ /* Next try size-sensitive type shortcuts. */
+ if (strcmp (reg->type, "float") == 0)
+ {
+ if (reg->bitsize == gdbarch_float_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_float;
+ else if (reg->bitsize == gdbarch_double_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_double;
+ else if (reg->bitsize == gdbarch_long_double_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_long_double;
+ }
+ else if (strcmp (reg->type, "int") == 0)
+ {
+ if (reg->bitsize == gdbarch_long_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_long;
+ else if (reg->bitsize == TARGET_CHAR_BIT)
+ return builtin_type (gdbarch)->builtin_char;
+ else if (reg->bitsize == gdbarch_short_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_short;
+ else if (reg->bitsize == gdbarch_int_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_int;
+ else if (reg->bitsize == gdbarch_long_long_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_long_long;
+ else if (reg->bitsize == gdbarch_ptr_bit (gdbarch))
+ /* A bit desperate by this point... */
+ return builtin_type (gdbarch)->builtin_data_ptr;
+ }
+ else if (strcmp (reg->type, "code_ptr") == 0)
+ return builtin_type (gdbarch)->builtin_func_ptr;
+ else if (strcmp (reg->type, "data_ptr") == 0)
+ return builtin_type (gdbarch)->builtin_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 (gdbarch)->builtin_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,
+ const struct target_desc *target_desc,
+ struct tdesc_arch_data *early_data)
+{
+ int num_regs = gdbarch_num_regs (gdbarch);
+ int i, ixf, ixr;
+ struct tdesc_feature *feature;
+ struct tdesc_reg *reg;
+ struct tdesc_arch_data *data;
+ htab_t reg_hash;
+
+ /* 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);
+}
+\f