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- /* Cache and manage the values of registers
- Copyright (C) 2014-2022 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 COMMON_COMMON_REGCACHE_H
- #define COMMON_COMMON_REGCACHE_H
- /* This header is a stopgap until we have an independent regcache. */
- enum register_status : signed char
- {
- /* The register value is not in the cache, and we don't know yet
- whether it's available in the target (or traceframe). */
- REG_UNKNOWN = 0,
- /* The register value is valid and cached. */
- REG_VALID = 1,
- /* The register value is unavailable. E.g., we're inspecting a
- traceframe, and this register wasn't collected. Note that this
- is different a different "unavailable" from saying the register
- does not exist in the target's architecture --- in that case,
- the target should have given us a target description that does
- not include the register in the first place. */
- REG_UNAVAILABLE = -1
- };
- /* Return a pointer to the register cache associated with the
- thread specified by PTID. This function must be provided by
- the client. */
- extern struct regcache *get_thread_regcache_for_ptid (ptid_t ptid);
- /* Return the size of register numbered N in REGCACHE. This function
- must be provided by the client. */
- extern int regcache_register_size (const struct regcache *regcache, int n);
- /* Read the PC register. This function must be provided by the
- client. */
- extern CORE_ADDR regcache_read_pc (struct regcache *regcache);
- /* Read the PC register. If PC cannot be read, return 0.
- This is a wrapper around 'regcache_read_pc'. */
- extern CORE_ADDR regcache_read_pc_protected (regcache *regcache);
- /* Read a raw register into a unsigned integer. */
- extern enum register_status regcache_raw_read_unsigned
- (struct regcache *regcache, int regnum, ULONGEST *val);
- ULONGEST regcache_raw_get_unsigned (struct regcache *regcache, int regnum);
- struct reg_buffer_common
- {
- virtual ~reg_buffer_common () = default;
- /* Get the availability status of the value of register REGNUM in this
- buffer. */
- virtual register_status get_register_status (int regnum) const = 0;
- /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
- virtual void raw_supply (int regnum, const void *buf) = 0;
- /* Collect register REGNUM from REGCACHE and store its contents in BUF. */
- virtual void raw_collect (int regnum, void *buf) const = 0;
- /* Compare the contents of the register stored in the regcache (ignoring the
- first OFFSET bytes) to the contents of BUF (without any offset). Returns
- true if the same. */
- virtual bool raw_compare (int regnum, const void *buf, int offset) const = 0;
- };
- #endif /* COMMON_COMMON_REGCACHE_H */
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