/* 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 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#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. */
-
-extern int max_register_size (struct gdbarch *gdbarch);
-
+/* Return the size of register REGNUM. All registers should have only
+ one size. */
+
+extern int register_size (struct gdbarch *gdbarch, int regnum);
-/* DEPRECATED: Character array containing an image of the inferior
- programs' registers for the most recently referenced thread. */
-extern char *registers;
+/* 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 the current state of each
- register (unavailable<0, invalid=0, valid>0) for the most recently
- referenced thread. */
+typedef int (regcache_cooked_read_ftype) (void *src, int regnum,
+ gdb_byte *buf);
-extern signed char *register_valid;
+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);
-extern char *deprecated_grub_regcache_for_registers (struct regcache *);
-extern char *deprecated_grub_regcache_for_register_valid (struct regcache *);
-
-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 registers_fetched (void);
-
-extern void read_register_bytes (int regbyte, char *myaddr, int len);
-
-extern void read_register_gen (int regnum, char *myaddr);
-
-extern void write_register_gen (int regnum, char *myaddr);
-
-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 */