/* 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 get_saved_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
extern int max_register_size (struct gdbarch *gdbarch);
-/* DEPRECATED: Character array containing an image of the inferior
- programs' registers for the most recently referenced thread. */
+/* Save/restore a register cache. The registers saved/restored is
+ determined by the save_reggroup and restore_reggroup (although you
+ can't restore a register that wasn't saved as well :-). You can
+ only save to a read-only cache (default from regcache_xmalloc())
+ from a live cache and you can only restore from a read-only cache
+ to a live cache. */
-extern char *registers;
-
-/* DEPRECATED: Character array containing the current state of each
- register (unavailable<0, invalid=0, valid>0) for the most recently
- referenced thread. */
-
-extern signed char *register_valid;
+extern void regcache_save (struct regcache *dst, struct regcache *src);
+extern void regcache_restore (struct regcache *dst, struct regcache *src);
/* 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 deprecated_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);
+extern void deprecated_read_register_bytes (int regbyte, char *myaddr,
+ int len);
+extern void deprecated_write_register_bytes (int regbyte, char *myaddr,
+ int len);
+
+/* 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;
+
+/* Character array containing an image of the inferior programs'
+ registers for the most recently referenced thread.
+
+ NOTE: cagney/2002-11-14: Target side code should be using
+ supply_register() and/or regcache_collect() while architecture side
+ code should use the more generic regcache methods. */
+
+extern char *deprecated_registers;
+
+/* 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 registers_fetched (void);
-
-extern void read_register_bytes (int regbyte, char *myaddr, int len);
-
-extern void deprecated_read_register_gen (int regnum, char *myaddr);
-
-extern void deprecated_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);