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123dc83914
(xml-tdesc.o): Update. * xml-support.c: Add a comment. (gdb_xml_enums_boolean): New variable. (gdb_xml_parse_attr_enum): Use strcasecmp. * xml-support.h (gdb_xml_enums_boolean): Declare. * xml-tdesc.c (struct tdesc_parsing_data): Record current_feature, next_regnum, and current_union. (tdesc_start_feature, tdesc_start_reg, tdesc_start_union) (tdesc_end_union, tdesc_start_field, tdesc_start_vector) (field_attributes, union_children, reg_attributes, union_attributes) (vector_attributes, feature_attributes, feature_children): New. (target_children): Make static. Add <feature>. (tdesc_elements): Make static. * target-descriptions.c (struct tdesc_reg, tdesc_reg_p, type_p) (struct tdesc_feature, tdesc_feature_p): New types. (struct target_desc): Add features member. (struct tdesc_arch_data, tdesc_data): New. (target_find_description): Clarify error message. Warn about ignored register descriptions. (tdesc_has_registers, tdesc_find_feature, tdesc_feature_name) (tdesc_named_type, tdesc_data_init, tdesc_data_alloc) (tdesc_data_cleanup, tdesc_numbered_register) (tdesc_numbered_register_choices, tdesc_find_register) (tdesc_register_name, tdesc_register_type) (tdesc_remote_register_number, tdesc_register_reggroup_p) (set_tdesc_pseudo_register_name, set_tdesc_pseudo_register_type) (set_tdesc_pseudo_register_reggroup_p, tdesc_use_registers) (tdesc_free_reg, tdesc_create_reg, tdesc_free_feature) (tdesc_create_feature, tdesc_record_type): New. (free_target_description): Free features. (_initialize_target_descriptions): Initialize tdesc_data. * arch-utils.c (default_remote_register_number): New. * arch-utils.h (default_remote_register_number): New prototype. * target-descriptions.h (set_tdesc_pseudo_register_name) (set_tdesc_pseudo_register_type, set_tdesc_pseudo_register_reggroup_p) (tdesc_use_registers, tdesc_data_alloc, tdesc_data_cleanup) (tdesc_numbered_register, tdesc_numbered_register_choices) (tdesc_has_registers, tdesc_find_feature, tdesc_feature_name) (tdesc_named_type, tdesc_create_feature, tdesc_record_type) (tdesc_create_reg): Declare. * gdbarch.sh (remote_register_number): New entry. * gdbarch.c, gdbarch.h: Regenerate. * remote.c (init_remote_state): Use gdbarch_remote_register_number. * features/gdb-target.dtd: Add feature, reg, vector, union, and field. * arm-tdep.c (arm_register_aliases): New. (arm_register_name_strings): Rename to... (arm_register_names): ...this. Make const. Delete the old version. (current_option, arm_register_byte): Delete. (set_disassembly_style): Simplify. Do not adjust arm_register_names. (value_of_arm_user_reg): New. (arm_gdbarch_init): Verify any described registers. Call tdesc_use_registers. Don't use arm_register_byte. Create aliases for standard register names. (_initialize_arm_tdep): Do not adjust arm_register_names. * user-regs.c (struct user_reg): Add baton member. (append_user_reg, user_reg_add_builtin, user_regs_init) (user_reg_add, value_of_user_reg): Use a baton for user register functions. * std-regs.c: Update. * user-regs.h (user_reg_read_ftype, user_reg_add_builtin) (user_reg_add): Add baton argument. * NEWS: Mention target description register support. * features/arm-core.xml, features/arm-fpa.xml: New. * eval.c (evaluate_subexp_standard): Allow ptype $register when the program is not running. * gdb.texinfo (-target-disconnect): Use @smallexample. (Requirements): Add anchor for Expat. Update description. (Target Descriptions): Mention Expat. (Target Description Format): Document new elements. Use @smallexample. (Predefined Target Types, Standard Target Features): New sections. * doc/gdbint.texinfo (Target Descriptions): New section. * gdb.xml/single-reg.xml, gdb.xml/tdesc-regs.exp, gdb.xml/core-only.xml, gdb.xml/extra-regs.xml: New files.
216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
/* User visible, per-frame registers, for GDB, the GNU debugger.
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Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
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Contributed by Red Hat.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "user-regs.h"
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#include "gdbtypes.h"
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#include "gdb_string.h"
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#include "gdb_assert.h"
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#include "frame.h"
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/* A table of user registers.
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User registers have regnum's that live above of the range [0
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.. NUM_REGS + NUM_PSEUDO_REGS) (which is controlled by the target).
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The target should never see a user register's regnum value.
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Always append, never delete. By doing this, the relative regnum
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(offset from NUM_REGS + NUM_PSEUDO_REGS) assigned to each user
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register never changes. */
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struct user_reg
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{
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const char *name;
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struct value *(*read) (struct frame_info * frame, const void *baton);
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const void *baton;
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struct user_reg *next;
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};
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/* This structure is named gdb_user_regs instead of user_regs to avoid
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conflicts with any "struct user_regs" in system headers. For instance,
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on ARM GNU/Linux native builds, nm-linux.h includes <signal.h> includes
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<sys/ucontext.h> includes <sys/procfs.h> includes <sys/user.h>, which
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declares "struct user_regs". */
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struct gdb_user_regs
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{
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struct user_reg *first;
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struct user_reg **last;
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};
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static void
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append_user_reg (struct gdb_user_regs *regs, const char *name,
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user_reg_read_ftype *read, const void *baton,
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struct user_reg *reg)
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{
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/* The caller is responsible for allocating memory needed to store
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the register. By doing this, the function can operate on a
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register list stored in the common heap or a specific obstack. */
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gdb_assert (reg != NULL);
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reg->name = name;
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reg->read = read;
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reg->baton = baton;
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reg->next = NULL;
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(*regs->last) = reg;
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regs->last = &(*regs->last)->next;
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}
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/* An array of the builtin user registers. */
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static struct gdb_user_regs builtin_user_regs = { NULL, &builtin_user_regs.first };
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void
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user_reg_add_builtin (const char *name, user_reg_read_ftype *read,
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const void *baton)
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{
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append_user_reg (&builtin_user_regs, name, read, baton,
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XMALLOC (struct user_reg));
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}
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/* Per-architecture user registers. Start with the builtin user
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registers and then, again, append. */
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static struct gdbarch_data *user_regs_data;
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static void *
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user_regs_init (struct gdbarch *gdbarch)
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{
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struct user_reg *reg;
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struct gdb_user_regs *regs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct gdb_user_regs);
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regs->last = ®s->first;
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for (reg = builtin_user_regs.first; reg != NULL; reg = reg->next)
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append_user_reg (regs, reg->name, reg->read, reg->baton,
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GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg));
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return regs;
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}
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void
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user_reg_add (struct gdbarch *gdbarch, const char *name,
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user_reg_read_ftype *read, const void *baton)
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{
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struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
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if (regs == NULL)
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{
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/* ULGH, called during architecture initialization. Patch
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things up. */
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regs = user_regs_init (gdbarch);
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deprecated_set_gdbarch_data (gdbarch, user_regs_data, regs);
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}
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append_user_reg (regs, name, read, baton,
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GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg));
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}
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int
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user_reg_map_name_to_regnum (struct gdbarch *gdbarch, const char *name,
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int len)
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{
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/* Make life easy, set the len to something reasonable. */
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if (len < 0)
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len = strlen (name);
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/* Search register name space first - always let an architecture
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specific register override the user registers. */
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{
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int i;
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int maxregs = (gdbarch_num_regs (gdbarch)
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+ gdbarch_num_pseudo_regs (gdbarch));
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for (i = 0; i < maxregs; i++)
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{
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const char *regname = gdbarch_register_name (gdbarch, i);
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if (regname != NULL && len == strlen (regname)
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&& strncmp (regname, name, len) == 0)
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{
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return i;
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}
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}
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}
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/* Search the user name space. */
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{
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struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
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struct user_reg *reg;
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int nr;
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for (nr = 0, reg = regs->first; reg != NULL; reg = reg->next, nr++)
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{
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if ((len < 0 && strcmp (reg->name, name))
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|| (len == strlen (reg->name)
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&& strncmp (reg->name, name, len) == 0))
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return NUM_REGS + NUM_PSEUDO_REGS + nr;
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}
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}
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return -1;
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}
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static struct user_reg *
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usernum_to_user_reg (struct gdbarch *gdbarch, int usernum)
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{
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struct gdb_user_regs *regs = gdbarch_data (gdbarch, user_regs_data);
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struct user_reg *reg;
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for (reg = regs->first; reg != NULL; reg = reg->next)
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{
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if (usernum == 0)
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return reg;
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usernum--;
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}
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return NULL;
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}
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const char *
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user_reg_map_regnum_to_name (struct gdbarch *gdbarch, int regnum)
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{
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int maxregs = (gdbarch_num_regs (gdbarch)
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+ gdbarch_num_pseudo_regs (gdbarch));
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if (regnum < 0)
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return NULL;
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else if (regnum < maxregs)
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return gdbarch_register_name (gdbarch, regnum);
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else
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{
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struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs);
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if (reg == NULL)
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return NULL;
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else
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return reg->name;
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}
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}
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struct value *
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value_of_user_reg (int regnum, struct frame_info *frame)
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{
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struct gdbarch *gdbarch = get_frame_arch (frame);
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int maxregs = (gdbarch_num_regs (gdbarch)
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+ gdbarch_num_pseudo_regs (gdbarch));
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struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs);
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gdb_assert (reg != NULL);
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return reg->read (frame, reg->baton);
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}
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extern initialize_file_ftype _initialize_user_regs; /* -Wmissing-prototypes */
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void
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_initialize_user_regs (void)
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{
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user_regs_data = gdbarch_data_register_post_init (user_regs_init);
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}
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