Commit | Line | Data |
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4e052eda | 1 | /* Cache and manage the values of registers for GDB, the GNU debugger. |
3fadccb3 | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001, |
7b6bb8da | 4 | 2002, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
4e052eda AC |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
4e052eda AC |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
4e052eda AC |
20 | |
21 | #ifndef REGCACHE_H | |
22 | #define REGCACHE_H | |
23 | ||
3fadccb3 AC |
24 | struct regcache; |
25 | struct gdbarch; | |
6c95b8df | 26 | struct address_space; |
3fadccb3 | 27 | |
594f7785 UW |
28 | extern struct regcache *get_current_regcache (void); |
29 | extern struct regcache *get_thread_regcache (ptid_t ptid); | |
c2250ad1 | 30 | extern struct regcache *get_thread_arch_regcache (ptid_t, struct gdbarch *); |
3fadccb3 AC |
31 | |
32 | void regcache_xfree (struct regcache *regcache); | |
36160dc4 | 33 | struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache); |
d37346f0 DJ |
34 | struct regcache *regcache_xmalloc (struct gdbarch *gdbarch, |
35 | struct address_space *aspace); | |
3fadccb3 | 36 | |
41d35cb0 MK |
37 | /* Return REGCACHE's architecture. */ |
38 | ||
39 | extern struct gdbarch *get_regcache_arch (const struct regcache *regcache); | |
40 | ||
6c95b8df PA |
41 | /* Return REGCACHE's address space. */ |
42 | ||
3e43a32a | 43 | extern struct address_space *get_regcache_aspace (const struct regcache *); |
6c95b8df | 44 | |
ee99023e PA |
45 | enum register_status |
46 | { | |
47 | /* The register value is not in the cache, and we don't know yet | |
48 | whether it's available in the target (or traceframe). */ | |
49 | REG_UNKNOWN = 0, | |
50 | ||
51 | /* The register value is valid and cached. */ | |
52 | REG_VALID = 1, | |
53 | ||
54 | /* The register value is unavailable. E.g., we're inspecting a | |
55 | traceframe, and this register wasn't collected. Note that this | |
56 | is different a different "unavailable" from saying the register | |
57 | does not exist in the target's architecture --- in that case, | |
58 | the target should have given us a target description that does | |
59 | not include the register in the first place. */ | |
60 | REG_UNAVAILABLE = -1 | |
61 | }; | |
62 | ||
63 | enum register_status regcache_register_status (const struct regcache *regcache, | |
64 | int regnum); | |
65 | ||
61a0eb5b | 66 | /* Transfer a raw register [0..NUM_REGS) between core-gdb and the |
0df8b418 | 67 | regcache. */ |
61a0eb5b | 68 | |
2d522557 | 69 | void regcache_raw_read (struct regcache *regcache, int rawnum, gdb_byte *buf); |
1aaa5f99 | 70 | void regcache_raw_write (struct regcache *regcache, int rawnum, |
2d522557 | 71 | const gdb_byte *buf); |
28fc6740 AC |
72 | extern void regcache_raw_read_signed (struct regcache *regcache, |
73 | int regnum, LONGEST *val); | |
74 | extern void regcache_raw_read_unsigned (struct regcache *regcache, | |
75 | int regnum, ULONGEST *val); | |
c00dcbe9 MK |
76 | extern void regcache_raw_write_signed (struct regcache *regcache, |
77 | int regnum, LONGEST val); | |
78 | extern void regcache_raw_write_unsigned (struct regcache *regcache, | |
79 | int regnum, ULONGEST val); | |
06c0b04e AC |
80 | |
81 | /* Partial transfer of a raw registers. These perform read, modify, | |
82 | write style operations. */ | |
83 | ||
84 | void regcache_raw_read_part (struct regcache *regcache, int regnum, | |
2d522557 | 85 | int offset, int len, gdb_byte *buf); |
06c0b04e | 86 | void regcache_raw_write_part (struct regcache *regcache, int regnum, |
2d522557 | 87 | int offset, int len, const gdb_byte *buf); |
06c0b04e | 88 | |
9c5ea4d9 UW |
89 | void regcache_invalidate (struct regcache *regcache, int regnum); |
90 | ||
68365089 | 91 | /* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */ |
2d522557 AC |
92 | void regcache_cooked_read (struct regcache *regcache, int rawnum, |
93 | gdb_byte *buf); | |
68365089 | 94 | void regcache_cooked_write (struct regcache *regcache, int rawnum, |
2d522557 | 95 | const gdb_byte *buf); |
68365089 | 96 | |
a378f419 AC |
97 | /* NOTE: cagney/2002-08-13: At present GDB has no reliable mechanism |
98 | for indicating when a ``cooked'' register was constructed from | |
99 | invalid or unavailable ``raw'' registers. One fairly easy way of | |
100 | adding such a mechanism would be for the cooked functions to return | |
101 | a register valid indication. Given the possibility of such a | |
102 | change, the extract functions below use a reference parameter, | |
103 | rather than a function result. */ | |
104 | ||
105 | /* Read a register as a signed/unsigned quantity. */ | |
106 | extern void regcache_cooked_read_signed (struct regcache *regcache, | |
107 | int regnum, LONGEST *val); | |
108 | extern void regcache_cooked_read_unsigned (struct regcache *regcache, | |
109 | int regnum, ULONGEST *val); | |
a66a9c23 AC |
110 | extern void regcache_cooked_write_signed (struct regcache *regcache, |
111 | int regnum, LONGEST val); | |
112 | extern void regcache_cooked_write_unsigned (struct regcache *regcache, | |
113 | int regnum, ULONGEST val); | |
a378f419 | 114 | |
06c0b04e AC |
115 | /* Partial transfer of a cooked register. These perform read, modify, |
116 | write style operations. */ | |
117 | ||
118 | void regcache_cooked_read_part (struct regcache *regcache, int regnum, | |
2d522557 | 119 | int offset, int len, gdb_byte *buf); |
06c0b04e | 120 | void regcache_cooked_write_part (struct regcache *regcache, int regnum, |
2d522557 | 121 | int offset, int len, const gdb_byte *buf); |
06c0b04e | 122 | |
515630c5 UW |
123 | /* Special routines to read/write the PC. */ |
124 | ||
125 | extern CORE_ADDR regcache_read_pc (struct regcache *regcache); | |
126 | extern void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc); | |
127 | ||
193cb69f AC |
128 | /* Transfer a raw register [0..NUM_REGS) between the regcache and the |
129 | target. These functions are called by the target in response to a | |
130 | target_fetch_registers() or target_store_registers(). */ | |
131 | ||
9a661b68 | 132 | extern void regcache_raw_supply (struct regcache *regcache, |
6618125d | 133 | int regnum, const void *buf); |
9a661b68 | 134 | extern void regcache_raw_collect (const struct regcache *regcache, |
6618125d | 135 | int regnum, void *buf); |
193cb69f AC |
136 | |
137 | ||
bb425013 AC |
138 | /* The type of a register. This function is slightly more efficient |
139 | then its gdbarch vector counterpart since it returns a precomputed | |
01e1877c | 140 | value stored in a table. */ |
bb425013 AC |
141 | |
142 | extern struct type *register_type (struct gdbarch *gdbarch, int regnum); | |
143 | ||
144 | ||
08a617da | 145 | /* Return the size of register REGNUM. All registers should have only |
01e1877c | 146 | one size. */ |
08a617da AC |
147 | |
148 | extern int register_size (struct gdbarch *gdbarch, int regnum); | |
149 | ||
150 | ||
5602984a AC |
151 | /* Save/restore a register cache. The set of registers saved / |
152 | restored into the DST regcache determined by the save_reggroup / | |
153 | restore_reggroup respectively. COOKED_READ returns zero iff the | |
154 | register's value can't be returned. */ | |
155 | ||
2d522557 AC |
156 | typedef int (regcache_cooked_read_ftype) (void *src, int regnum, |
157 | gdb_byte *buf); | |
5602984a AC |
158 | |
159 | extern void regcache_save (struct regcache *dst, | |
160 | regcache_cooked_read_ftype *cooked_read, | |
2d522557 | 161 | void *cooked_read_context); |
5602984a AC |
162 | extern void regcache_restore (struct regcache *dst, |
163 | regcache_cooked_read_ftype *cooked_read, | |
2d522557 | 164 | void *cooked_read_context); |
2d28509a | 165 | |
37e71372 AC |
166 | /* Copy/duplicate the contents of a register cache. By default, the |
167 | operation is pass-through. Writes to DST and reads from SRC will | |
168 | go through to the target. | |
169 | ||
170 | The ``cpy'' functions can not have overlapping SRC and DST buffers. | |
3fadccb3 AC |
171 | |
172 | ``no passthrough'' versions do not go through to the target. They | |
37e71372 | 173 | only transfer values already in the cache. */ |
3fadccb3 | 174 | |
3fadccb3 | 175 | extern struct regcache *regcache_dup (struct regcache *regcache); |
3fadccb3 | 176 | extern void regcache_cpy (struct regcache *dest, struct regcache *src); |
3e43a32a MS |
177 | extern void regcache_cpy_no_passthrough (struct regcache *dest, |
178 | struct regcache *src); | |
3fadccb3 | 179 | |
4e052eda | 180 | extern void registers_changed (void); |
e66408ed | 181 | extern void registers_changed_ptid (ptid_t); |
4e052eda | 182 | |
4e052eda | 183 | #endif /* REGCACHE_H */ |