/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000,
- 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001,
+ 2002, 2007, 2008 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef REGCACHE_H
#define REGCACHE_H
struct regcache;
struct gdbarch;
-extern struct regcache *current_regcache;
+extern struct regcache *get_current_regcache (void);
+extern struct regcache *get_thread_regcache (ptid_t ptid);
void regcache_xfree (struct regcache *regcache);
struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache);
struct regcache *regcache_xmalloc (struct gdbarch *gdbarch);
+/* Return REGCACHE's architecture. */
+
+extern struct gdbarch *get_regcache_arch (const struct regcache *regcache);
+
/* Transfer a raw register [0..NUM_REGS) between core-gdb and the
regcache. */
-void regcache_raw_read (struct regcache *regcache, int rawnum, void *buf);
+void regcache_raw_read (struct regcache *regcache, int rawnum, gdb_byte *buf);
void regcache_raw_write (struct regcache *regcache, int rawnum,
- const void *buf);
+ const gdb_byte *buf);
extern void regcache_raw_read_signed (struct regcache *regcache,
int regnum, LONGEST *val);
extern void regcache_raw_read_unsigned (struct regcache *regcache,
write style operations. */
void regcache_raw_read_part (struct regcache *regcache, int regnum,
- int offset, int len, void *buf);
+ int offset, int len, gdb_byte *buf);
void regcache_raw_write_part (struct regcache *regcache, int regnum,
- int offset, int len, const void *buf);
+ int offset, int len, const gdb_byte *buf);
+
+int regcache_valid_p (const struct regcache *regcache, int regnum);
-int regcache_valid_p (struct regcache *regcache, int regnum);
+void regcache_invalidate (struct regcache *regcache, int regnum);
/* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
-void regcache_cooked_read (struct regcache *regcache, int rawnum, void *buf);
+void regcache_cooked_read (struct regcache *regcache, int rawnum,
+ gdb_byte *buf);
void regcache_cooked_write (struct regcache *regcache, int rawnum,
- const void *buf);
+ const gdb_byte *buf);
/* NOTE: cagney/2002-08-13: At present GDB has no reliable mechanism
for indicating when a ``cooked'' register was constructed from
int regnum, LONGEST *val);
extern void regcache_cooked_read_unsigned (struct regcache *regcache,
int regnum, ULONGEST *val);
+extern void regcache_cooked_write_signed (struct regcache *regcache,
+ int regnum, LONGEST val);
+extern void regcache_cooked_write_unsigned (struct regcache *regcache,
+ int regnum, ULONGEST val);
/* Partial transfer of a cooked register. These perform read, modify,
write style operations. */
void regcache_cooked_read_part (struct regcache *regcache, int regnum,
- int offset, int len, void *buf);
+ int offset, int len, gdb_byte *buf);
void regcache_cooked_write_part (struct regcache *regcache, int regnum,
- int offset, int len, const void *buf);
+ int offset, int len, const gdb_byte *buf);
/* Transfer a raw register [0..NUM_REGS) between the regcache and the
target. These functions are called by the target in response to a
target_fetch_registers() or target_store_registers(). */
-extern void supply_register (int regnum, const void *val);
-extern void regcache_collect (int regnum, void *buf);
+extern void regcache_raw_supply (struct regcache *regcache,
+ int regnum, const void *buf);
+extern void regcache_raw_collect (const struct regcache *regcache,
+ int regnum, void *buf);
/* The register's ``offset''.
- NOTE: cagney/2002-08-17: The ``struct value'' and expression
- evaluator treat the register cache as a large liner buffer.
- Instead of reading/writing a register using its register number,
- the code read/writes registers by specifying their offset into the
- buffer and a number of bytes. The code also assumes that these
- byte read/writes can cross register boundaries, adjacent registers
- treated as a contiguous set of bytes.
-
- The below map that model onto the real register cache. New code
- should go out of their way to avoid using these interfaces.
-
- FIXME: cagney/2002-08-17: The ``struct value'' and expression
- evaluator should be fixed. Instead of using the { offset, length }
- pair to describe a value within one or more registers, the code
- should use a chain of { regnum, offset, len } tripples. */
+ FIXME: cagney/2002-11-07: The frame_register() function, when
+ specifying the real location of a register, does so using that
+ registers offset in the register cache. That offset is then used
+ by valops.c to determine the location of the register. The code
+ should instead use the register's number and a location expression
+ to describe a value spread across multiple registers or memory. */
extern int register_offset_hack (struct gdbarch *gdbarch, int regnum);
-extern void regcache_cooked_read_using_offset_hack (struct regcache *regcache,
- int offset, int len,
- void *buf);
-extern void regcache_cooked_write_using_offset_hack (struct regcache *regcache,
- int offset, int len,
- const void *buf);
/* The type of a register. This function is slightly more efficient
then its gdbarch vector counterpart since it returns a precomputed
- value stored in a table.
-
- NOTE: cagney/2002-08-17: The original macro was called
- REGISTER_VIRTUAL_TYPE. This was because the register could have
- different raw and cooked (nee virtual) representations. The
- CONVERTABLE methods being used to convert between the two
- representations. Current code does not do this. Instead, the
- first [0..NUM_REGS) registers are 1:1 raw:cooked, and the type
- exactly describes the register's representation. Consequently, the
- ``virtual'' has been dropped.
-
- FIXME: cagney/2002-08-17: A number of architectures, including the
- MIPS, are currently broken in this regard. */
+ value stored in a table. */
extern struct type *register_type (struct gdbarch *gdbarch, int regnum);
-/* Return the size of the largest register. Used when allocating
- space for an aribtrary register value. */
+/* Return the size of register REGNUM. All registers should have only
+ one size. */
+
+extern int register_size (struct gdbarch *gdbarch, int regnum);
-extern int max_register_size (struct gdbarch *gdbarch);
+/* Save/restore a register cache. The set of registers saved /
+ restored into the DST regcache determined by the save_reggroup /
+ restore_reggroup respectively. COOKED_READ returns zero iff the
+ register's value can't be returned. */
-/* DEPRECATED: Character array containing an image of the inferior
- programs' registers for the most recently referenced thread. */
+typedef int (regcache_cooked_read_ftype) (void *src, int regnum,
+ gdb_byte *buf);
-extern char *registers;
+extern void regcache_save (struct regcache *dst,
+ regcache_cooked_read_ftype *cooked_read,
+ void *cooked_read_context);
+extern void regcache_restore (struct regcache *dst,
+ regcache_cooked_read_ftype *cooked_read,
+ void *cooked_read_context);
/* Copy/duplicate the contents of a register cache. By default, the
operation is pass-through. Writes to DST and reads from SRC will
extern void regcache_cpy (struct regcache *dest, struct regcache *src);
extern void regcache_cpy_no_passthrough (struct regcache *dest, struct regcache *src);
-/* NOTE: cagney/2002-11-02: The below have been superseded by the
- regcache_cooked_*() functions found above, and the frame_*()
- functions found in "frame.h". Take care though, often more than a
- simple substitution is required when updating the code. The
- change, as far as practical, should avoid adding references to
- global variables (e.g., current_regcache, current_frame,
- current_gdbarch or selected_frame) and instead refer to the FRAME
- or REGCACHE that has been passed into the containing function as
- parameters. Consequently, the change typically involves modifying
- the containing function so that it takes a FRAME or REGCACHE
- parameter. In the case of an architecture vector method, there
- should already be a non-deprecated variant that is parameterized
- with FRAME or REGCACHE. */
-
-extern char *deprecated_grub_regcache_for_registers (struct regcache *);
-extern char *deprecated_grub_regcache_for_register_valid (struct regcache *);
-extern void deprecated_read_register_gen (int regnum, char *myaddr);
-extern void deprecated_write_register_gen (int regnum, char *myaddr);
-
-/* Character array containing the current state of each register
- (unavailable<0, invalid=0, valid>0) for the most recently
- referenced thread. This global is often found in close proximity
- to code that is directly manipulating the deprecated_registers[]
- array. In such cases, it should be possible to replace the lot
- with a call to supply_register(). If you find yourself in dire
- straits, still needing access to the cache status bit, the
- regcache_valid_p() and set_register_cached() functions are
- available. */
-extern signed char *deprecated_register_valid;
-
-/* NOTE: cagney/2002-11-05: This function, and its co-conspirator
- deprecated_registers[], have been superseeded by supply_register(). */
-extern void deprecated_registers_fetched (void);
-
-extern int register_cached (int regnum);
-
-extern void set_register_cached (int regnum, int state);
-
-extern void register_changed (int regnum);
-
extern void registers_changed (void);
-
-extern void read_register_bytes (int regbyte, char *myaddr, int len);
-
-extern void write_register_bytes (int regbyte, char *myaddr, int len);
-
-/* Rename to read_unsigned_register()? */
-extern ULONGEST read_register (int regnum);
-
-/* Rename to read_unsigned_register_pid()? */
-extern ULONGEST read_register_pid (int regnum, ptid_t ptid);
-
-extern LONGEST read_signed_register (int regnum);
-
-extern LONGEST read_signed_register_pid (int regnum, ptid_t ptid);
-
-extern void write_register (int regnum, LONGEST val);
-
-extern void write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid);
-
#endif /* REGCACHE_H */
projects / deliverable / binutils-gdb.git / blobdiff