1 /* Cache and manage the values of registers for GDB, the GNU debugger.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 extern struct regcache *get_current_regcache (void);
28 extern struct regcache *get_thread_regcache (ptid_t ptid);
29 extern struct regcache *get_thread_arch_regcache (ptid_t, struct gdbarch *);
30 extern struct regcache *get_thread_arch_aspace_regcache (ptid_t,
32 struct address_space *);
34 void regcache_xfree (struct regcache *regcache);
35 struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache);
36 struct regcache *regcache_xmalloc (struct gdbarch *gdbarch,
37 struct address_space *aspace);
39 /* Return REGCACHE's architecture. */
41 extern struct gdbarch *get_regcache_arch (const struct regcache *regcache);
43 /* Return REGCACHE's address space. */
45 extern struct address_space *get_regcache_aspace (const struct regcache *);
49 /* The register value is not in the cache, and we don't know yet
50 whether it's available in the target (or traceframe). */
53 /* The register value is valid and cached. */
56 /* The register value is unavailable. E.g., we're inspecting a
57 traceframe, and this register wasn't collected. Note that this
58 is different a different "unavailable" from saying the register
59 does not exist in the target's architecture --- in that case,
60 the target should have given us a target description that does
61 not include the register in the first place. */
65 enum register_status regcache_register_status (const struct regcache *regcache,
68 /* Transfer a raw register [0..NUM_REGS) between core-gdb and the
69 regcache. The read variants return the status of the register. */
71 enum register_status regcache_raw_read (struct regcache *regcache,
72 int rawnum, gdb_byte *buf);
73 void regcache_raw_write (struct regcache *regcache, int rawnum,
75 extern enum register_status
76 regcache_raw_read_signed (struct regcache *regcache,
77 int regnum, LONGEST *val);
78 extern enum register_status
79 regcache_raw_read_unsigned (struct regcache *regcache,
80 int regnum, ULONGEST *val);
81 extern void regcache_raw_write_signed (struct regcache *regcache,
82 int regnum, LONGEST val);
83 extern void regcache_raw_write_unsigned (struct regcache *regcache,
84 int regnum, ULONGEST val);
86 /* Partial transfer of raw registers. These perform read, modify,
87 write style operations. The read variant returns the status of the
90 extern enum register_status
91 regcache_raw_read_part (struct regcache *regcache, int regnum,
92 int offset, int len, gdb_byte *buf);
93 void regcache_raw_write_part (struct regcache *regcache, int regnum,
94 int offset, int len, const gdb_byte *buf);
96 void regcache_invalidate (struct regcache *regcache, int regnum);
98 /* Transfer of pseudo-registers. The read variants return a register
99 status, as an indication of when a ``cooked'' register was
100 constructed from valid, invalid or unavailable ``raw''
103 /* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
104 enum register_status regcache_cooked_read (struct regcache *regcache,
105 int rawnum, gdb_byte *buf);
106 void regcache_cooked_write (struct regcache *regcache, int rawnum,
107 const gdb_byte *buf);
109 /* Read register REGNUM from REGCACHE and return a new value. This
110 will call mark_value_bytes_unavailable as appropriate. */
112 struct value *regcache_cooked_read_value (struct regcache *regcache,
115 /* Read a register as a signed/unsigned quantity. */
116 extern enum register_status
117 regcache_cooked_read_signed (struct regcache *regcache,
118 int regnum, LONGEST *val);
119 extern enum register_status
120 regcache_cooked_read_unsigned (struct regcache *regcache,
121 int regnum, ULONGEST *val);
122 extern void regcache_cooked_write_signed (struct regcache *regcache,
123 int regnum, LONGEST val);
124 extern void regcache_cooked_write_unsigned (struct regcache *regcache,
125 int regnum, ULONGEST val);
127 /* Partial transfer of a cooked register. These perform read, modify,
128 write style operations. */
130 enum register_status regcache_cooked_read_part (struct regcache *regcache,
131 int regnum, int offset,
132 int len, gdb_byte *buf);
133 void regcache_cooked_write_part (struct regcache *regcache, int regnum,
134 int offset, int len, const gdb_byte *buf);
136 /* Special routines to read/write the PC. */
138 extern CORE_ADDR regcache_read_pc (struct regcache *regcache);
139 extern void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc);
141 /* Transfer a raw register [0..NUM_REGS) between the regcache and the
142 target. These functions are called by the target in response to a
143 target_fetch_registers() or target_store_registers(). */
145 extern void regcache_raw_supply (struct regcache *regcache,
146 int regnum, const void *buf);
147 extern void regcache_raw_collect (const struct regcache *regcache,
148 int regnum, void *buf);
151 /* The type of a register. This function is slightly more efficient
152 then its gdbarch vector counterpart since it returns a precomputed
153 value stored in a table. */
155 extern struct type *register_type (struct gdbarch *gdbarch, int regnum);
158 /* Return the size of register REGNUM. All registers should have only
161 extern int register_size (struct gdbarch *gdbarch, int regnum);
164 /* Save/restore a register cache. The set of registers saved /
165 restored into the DST regcache determined by the save_reggroup /
166 restore_reggroup respectively. COOKED_READ returns zero iff the
167 register's value can't be returned. */
169 typedef enum register_status (regcache_cooked_read_ftype) (void *src,
173 extern void regcache_save (struct regcache *dst,
174 regcache_cooked_read_ftype *cooked_read,
175 void *cooked_read_context);
177 /* Copy/duplicate the contents of a register cache. By default, the
178 operation is pass-through. Writes to DST and reads from SRC will
179 go through to the target.
181 The ``cpy'' functions can not have overlapping SRC and DST buffers.
183 ``no passthrough'' versions do not go through to the target. They
184 only transfer values already in the cache. */
186 extern struct regcache *regcache_dup (struct regcache *regcache);
187 extern void regcache_cpy (struct regcache *dest, struct regcache *src);
188 extern void regcache_cpy_no_passthrough (struct regcache *dest,
189 struct regcache *src);
191 extern void registers_changed (void);
192 extern void registers_changed_ptid (ptid_t);
194 #endif /* REGCACHE_H */