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/* Register support routines for the remote server for GDB.
Copyright (C) 2001-2014 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef REGCACHE_H
#define REGCACHE_H
struct thread_info;
struct target_desc;
/* The register exists, it has a value, but we don't know what it is.
Used when inspecting traceframes. */
#define REG_UNAVAILABLE 0
/* We know the register's value (and we have it cached). */
#define REG_VALID 1
/* The data for the register cache. Note that we have one per
inferior; this is primarily for simplicity, as the performance
benefit is minimal. */
struct regcache
{
/* The regcache's target description. */
const struct target_desc *tdesc;
/* Whether the REGISTERS buffer's contents are valid. If false, we
haven't fetched the registers from the target yet. Not that this
register cache is _not_ pass-through, unlike GDB's. Note that
"valid" here is unrelated to whether the registers are available
in a traceframe. For that, check REGISTER_STATUS below. */
int registers_valid;
int registers_owned;
unsigned char *registers;
#ifndef IN_PROCESS_AGENT
/* One of REG_UNAVAILBLE or REG_VALID. */
unsigned char *register_status;
#endif
};
struct regcache *init_register_cache (struct regcache *regcache,
const struct target_desc *tdesc,
unsigned char *regbuf);
void regcache_cpy (struct regcache *dst, struct regcache *src);
/* Create a new register cache for INFERIOR. */
struct regcache *new_register_cache (const struct target_desc *tdesc);
struct regcache *get_thread_regcache (struct thread_info *thread, int fetch);
/* Release all memory associated with the register cache for INFERIOR. */
void free_register_cache (struct regcache *regcache);
/* Invalidate cached registers for one thread. */
void regcache_invalidate_thread (struct thread_info *);
/* Invalidate cached registers for all threads of the current
process. */
void regcache_invalidate (void);
/* Invalidate and release the register cache of all threads of the
current process. */
void regcache_release (void);
/* Convert all registers to a string in the currently specified remote
format. */
void registers_to_string (struct regcache *regcache, char *buf);
/* Convert a string to register values and fill our register cache. */
void registers_from_string (struct regcache *regcache, char *buf);
CORE_ADDR regcache_read_pc (struct regcache *regcache);
void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc);
/* Return a pointer to the description of register ``n''. */
struct reg *find_register_by_number (const struct target_desc *tdesc, int n);
int register_cache_size (const struct target_desc *tdesc);
int register_size (const struct target_desc *tdesc, int n);
int find_regno (const struct target_desc *tdesc, const char *name);
void supply_register (struct regcache *regcache, int n, const void *buf);
void supply_register_zeroed (struct regcache *regcache, int n);
void supply_register_by_name (struct regcache *regcache,
const char *name, const void *buf);
void supply_regblock (struct regcache *regcache, const void *buf);
void collect_register (struct regcache *regcache, int n, void *buf);
void collect_register_as_string (struct regcache *regcache, int n, char *buf);
void collect_register_by_name (struct regcache *regcache,
const char *name, void *buf);
#endif /* REGCACHE_H */
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