1 /* Cache and manage the values of registers for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001,
4 2002, 2007 Free Software Foundation, Inc.
6 This file is part of GDB.
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
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
29 extern struct regcache *current_regcache;
31 void regcache_xfree (struct regcache *regcache);
32 struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache);
33 struct regcache *regcache_xmalloc (struct gdbarch *gdbarch);
35 /* Return REGCACHE's architecture. */
37 extern struct gdbarch *get_regcache_arch (const struct regcache *regcache);
39 /* Transfer a raw register [0..NUM_REGS) between core-gdb and the
42 void regcache_raw_read (struct regcache *regcache, int rawnum, gdb_byte *buf);
43 void regcache_raw_write (struct regcache *regcache, int rawnum,
45 extern void regcache_raw_read_signed (struct regcache *regcache,
46 int regnum, LONGEST *val);
47 extern void regcache_raw_read_unsigned (struct regcache *regcache,
48 int regnum, ULONGEST *val);
49 extern void regcache_raw_write_signed (struct regcache *regcache,
50 int regnum, LONGEST val);
51 extern void regcache_raw_write_unsigned (struct regcache *regcache,
52 int regnum, ULONGEST val);
54 /* Partial transfer of a raw registers. These perform read, modify,
55 write style operations. */
57 void regcache_raw_read_part (struct regcache *regcache, int regnum,
58 int offset, int len, gdb_byte *buf);
59 void regcache_raw_write_part (struct regcache *regcache, int regnum,
60 int offset, int len, const gdb_byte *buf);
62 int regcache_valid_p (struct regcache *regcache, int regnum);
64 /* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
65 void regcache_cooked_read (struct regcache *regcache, int rawnum,
67 void regcache_cooked_write (struct regcache *regcache, int rawnum,
70 /* NOTE: cagney/2002-08-13: At present GDB has no reliable mechanism
71 for indicating when a ``cooked'' register was constructed from
72 invalid or unavailable ``raw'' registers. One fairly easy way of
73 adding such a mechanism would be for the cooked functions to return
74 a register valid indication. Given the possibility of such a
75 change, the extract functions below use a reference parameter,
76 rather than a function result. */
78 /* Read a register as a signed/unsigned quantity. */
79 extern void regcache_cooked_read_signed (struct regcache *regcache,
80 int regnum, LONGEST *val);
81 extern void regcache_cooked_read_unsigned (struct regcache *regcache,
82 int regnum, ULONGEST *val);
83 extern void regcache_cooked_write_signed (struct regcache *regcache,
84 int regnum, LONGEST val);
85 extern void regcache_cooked_write_unsigned (struct regcache *regcache,
86 int regnum, ULONGEST val);
88 /* Partial transfer of a cooked register. These perform read, modify,
89 write style operations. */
91 void regcache_cooked_read_part (struct regcache *regcache, int regnum,
92 int offset, int len, gdb_byte *buf);
93 void regcache_cooked_write_part (struct regcache *regcache, int regnum,
94 int offset, int len, const gdb_byte *buf);
96 /* Transfer a raw register [0..NUM_REGS) between the regcache and the
97 target. These functions are called by the target in response to a
98 target_fetch_registers() or target_store_registers(). */
100 extern void regcache_raw_supply (struct regcache *regcache,
101 int regnum, const void *buf);
102 extern void regcache_raw_collect (const struct regcache *regcache,
103 int regnum, void *buf);
106 /* The register's ``offset''.
108 FIXME: cagney/2002-11-07: The frame_register() function, when
109 specifying the real location of a register, does so using that
110 registers offset in the register cache. That offset is then used
111 by valops.c to determine the location of the register. The code
112 should instead use the register's number and a location expression
113 to describe a value spread across multiple registers or memory. */
115 extern int register_offset_hack (struct gdbarch *gdbarch, int regnum);
118 /* The type of a register. This function is slightly more efficient
119 then its gdbarch vector counterpart since it returns a precomputed
120 value stored in a table. */
122 extern struct type *register_type (struct gdbarch *gdbarch, int regnum);
125 /* Return the size of register REGNUM. All registers should have only
128 extern int register_size (struct gdbarch *gdbarch, int regnum);
131 /* Save/restore a register cache. The set of registers saved /
132 restored into the DST regcache determined by the save_reggroup /
133 restore_reggroup respectively. COOKED_READ returns zero iff the
134 register's value can't be returned. */
136 typedef int (regcache_cooked_read_ftype) (void *src, int regnum,
139 extern void regcache_save (struct regcache *dst,
140 regcache_cooked_read_ftype *cooked_read,
141 void *cooked_read_context);
142 extern void regcache_restore (struct regcache *dst,
143 regcache_cooked_read_ftype *cooked_read,
144 void *cooked_read_context);
146 /* Copy/duplicate the contents of a register cache. By default, the
147 operation is pass-through. Writes to DST and reads from SRC will
148 go through to the target.
150 The ``cpy'' functions can not have overlapping SRC and DST buffers.
152 ``no passthrough'' versions do not go through to the target. They
153 only transfer values already in the cache. */
155 extern struct regcache *regcache_dup (struct regcache *regcache);
156 extern struct regcache *regcache_dup_no_passthrough (struct regcache *regcache);
157 extern void regcache_cpy (struct regcache *dest, struct regcache *src);
158 extern void regcache_cpy_no_passthrough (struct regcache *dest, struct regcache *src);
160 /* NOTE: cagney/2002-11-02: The below have been superseded by the
161 regcache_cooked_*() functions found above, and the frame_*()
162 functions found in "frame.h". Take care though, often more than a
163 simple substitution is required when updating the code. The
164 change, as far as practical, should avoid adding references to
165 global variables (e.g., current_regcache, current_frame,
166 current_gdbarch or the selected frame) and instead refer to
167 the FRAME or REGCACHE that has been passed into the containing
168 function as parameters. Consequently, the change typically
169 involves modifying the containing function so that it takes a FRAME
170 or REGCACHE parameter. In the case of an architecture vector
171 method, there should already be a non-deprecated variant that is
172 parameterized with FRAME or REGCACHE. */
174 extern void deprecated_read_register_gen (int regnum, gdb_byte *myaddr);
175 extern void deprecated_write_register_gen (int regnum, gdb_byte *myaddr);
177 /* NOTE: cagney/2002-11-05: This function has been superseeded by
178 regcache_raw_supply(). */
179 extern void deprecated_registers_fetched (void);
181 extern int register_cached (int regnum);
183 extern void set_register_cached (int regnum, int state);
185 extern void registers_changed (void);
188 /* Rename to read_unsigned_register()? */
189 extern ULONGEST read_register (int regnum);
191 /* Rename to read_unsigned_register_pid()? */
192 extern ULONGEST read_register_pid (int regnum, ptid_t ptid);
194 extern void write_register (int regnum, LONGEST val);
196 extern void write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid);
198 #endif /* REGCACHE_H */