1 /* Register support routines for the remote server for GDB.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "common-regcache.h"
27 /* The data for the register cache. Note that we have one per
28 inferior; this is primarily for simplicity, as the performance
29 benefit is minimal. */
31 struct regcache
: public reg_buffer_common
33 /* The regcache's target description. */
34 const struct target_desc
*tdesc
= nullptr;
36 /* Whether the REGISTERS buffer's contents are valid. If false, we
37 haven't fetched the registers from the target yet. Not that this
38 register cache is _not_ pass-through, unlike GDB's. Note that
39 "valid" here is unrelated to whether the registers are available
40 in a traceframe. For that, check REGISTER_STATUS below. */
41 int registers_valid
= 0;
42 int registers_owned
= 0;
43 unsigned char *registers
= nullptr;
44 #ifndef IN_PROCESS_AGENT
45 /* One of REG_UNAVAILBLE or REG_VALID. */
46 unsigned char *register_status
= nullptr;
49 /* See common/common-regcache.h. */
50 enum register_status
get_register_status (int regnum
) const override
;
52 /* See common/common-regcache.h. */
53 void raw_supply (int regnum
, const void *buf
) override
;
55 /* See common/common-regcache.h. */
56 void raw_collect (int regnum
, void *buf
) const override
;
58 /* See common/common-regcache.h. */
59 bool raw_compare (int regnum
, const void *buf
, int offset
) const override
;
62 struct regcache
*init_register_cache (struct regcache
*regcache
,
63 const struct target_desc
*tdesc
,
64 unsigned char *regbuf
);
66 void regcache_cpy (struct regcache
*dst
, struct regcache
*src
);
68 /* Create a new register cache for INFERIOR. */
70 struct regcache
*new_register_cache (const struct target_desc
*tdesc
);
72 struct regcache
*get_thread_regcache (struct thread_info
*thread
, int fetch
);
74 /* Release all memory associated with the register cache for INFERIOR. */
76 void free_register_cache (struct regcache
*regcache
);
78 /* Invalidate cached registers for one thread. */
80 void regcache_invalidate_thread (struct thread_info
*);
82 /* Invalidate cached registers for all threads of the given process. */
84 void regcache_invalidate_pid (int pid
);
86 /* Invalidate cached registers for all threads of the current
89 void regcache_invalidate (void);
91 /* Invalidate and release the register cache of all threads of the
94 void regcache_release (void);
96 /* Convert all registers to a string in the currently specified remote
99 void registers_to_string (struct regcache
*regcache
, char *buf
);
101 /* Convert a string to register values and fill our register cache. */
103 void registers_from_string (struct regcache
*regcache
, char *buf
);
105 /* For regcache_read_pc see common/common-regcache.h. */
107 void regcache_write_pc (struct regcache
*regcache
, CORE_ADDR pc
);
109 int register_cache_size (const struct target_desc
*tdesc
);
111 int register_size (const struct target_desc
*tdesc
, int n
);
113 int find_regno (const struct target_desc
*tdesc
, const char *name
);
115 void supply_register (struct regcache
*regcache
, int n
, const void *buf
);
117 void supply_register_zeroed (struct regcache
*regcache
, int n
);
119 void supply_register_by_name (struct regcache
*regcache
,
120 const char *name
, const void *buf
);
122 void supply_register_by_name_zeroed (struct regcache
*regcache
,
125 void supply_regblock (struct regcache
*regcache
, const void *buf
);
127 void collect_register (struct regcache
*regcache
, int n
, void *buf
);
129 void collect_register_as_string (struct regcache
*regcache
, int n
, char *buf
);
131 void collect_register_by_name (struct regcache
*regcache
,
132 const char *name
, void *buf
);
134 /* Read a raw register as an unsigned integer. Convenience wrapper
135 around regcache_raw_get_unsigned that takes a register name instead
136 of a register number. */
138 ULONGEST
regcache_raw_get_unsigned_by_name (struct regcache
*regcache
,
141 #endif /* REGCACHE_H */
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