extern struct regcache *current_regcache;
void regcache_xfree (struct regcache *regcache);
+struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache);
struct regcache *regcache_xmalloc (struct gdbarch *gdbarch);
/* Transfer a raw register [0..NUM_REGS) between core-gdb and the
regcache. */
-void regcache_read (struct regcache *regcache, int rawnum, char *buf);
-void regcache_write (struct regcache *regcache, int rawnum, char *buf);
+void regcache_raw_read (struct regcache *regcache, int rawnum, void *buf);
+void regcache_raw_write (struct regcache *regcache, int rawnum,
+ const void *buf);
+extern void regcache_raw_read_signed (struct regcache *regcache,
+ int regnum, LONGEST *val);
+extern void regcache_raw_read_unsigned (struct regcache *regcache,
+ int regnum, ULONGEST *val);
+extern void regcache_raw_write_signed (struct regcache *regcache,
+ int regnum, LONGEST val);
+extern void regcache_raw_write_unsigned (struct regcache *regcache,
+ int regnum, ULONGEST val);
+
+/* Partial transfer of a raw registers. These perform read, modify,
+ write style operations. */
+
+void regcache_raw_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, void *buf);
+void regcache_raw_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const void *buf);
+
int regcache_valid_p (struct regcache *regcache, int regnum);
-CORE_ADDR regcache_read_as_address (struct regcache *regcache, int rawnum);
+
+/* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
+void regcache_cooked_read (struct regcache *regcache, int rawnum, void *buf);
+void regcache_cooked_write (struct regcache *regcache, int rawnum,
+ const void *buf);
+
+/* NOTE: cagney/2002-08-13: At present GDB has no reliable mechanism
+ for indicating when a ``cooked'' register was constructed from
+ invalid or unavailable ``raw'' registers. One fairly easy way of
+ adding such a mechanism would be for the cooked functions to return
+ a register valid indication. Given the possibility of such a
+ change, the extract functions below use a reference parameter,
+ rather than a function result. */
+
+/* Read a register as a signed/unsigned quantity. */
+extern void regcache_cooked_read_signed (struct regcache *regcache,
+ int regnum, LONGEST *val);
+extern void regcache_cooked_read_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);
+void regcache_cooked_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const void *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, char *val);
+extern void supply_register (int regnum, const void *val);
extern void regcache_collect (int regnum, void *buf);
-/* DEPRECATED: Character array containing an image of the inferior
- programs' registers for the most recently referenced thread. */
+/* The register's ``offset''.
+
+ 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);
+
+
+/* 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. */
+
+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.
+
+ FIXME: cagney/2003-02-28:
-extern char *registers;
+ Unfortunatly, thanks to some legacy architectures, this doesn't
+ hold. A register's cooked (nee virtual) and raw size can differ
+ (see MIPS). Such architectures should be using different register
+ numbers for the different sized views of identical registers.
-/* DEPRECATED: Character array containing the current state of each
- register (unavailable<0, invalid=0, valid>0) for the most recently
- referenced thread. */
+ Anyway, the up-shot is that, until that mess is fixed, core code
+ can end up being very confused - should the RAW or VIRTUAL size be
+ used? As a rule of thumb, use REGISTER_VIRTUAL_SIZE in cooked
+ code, but with the comment:
-extern signed char *register_valid;
+ OK: REGISTER_VIRTUAL_SIZE
-/* Save/restore the register cache using the regbuf. The operation is
- write through - it is strictly for code that needs to restore the
- target's registers to a previous state.
+ or just
+
+ OK
+
+ appended to the end of the line. */
+
+extern int register_size (struct gdbarch *gdbarch, int regnum);
+
+
+/* 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. */
+
+typedef int (regcache_cooked_read_ftype) (void *src, int regnum, void *buf);
+
+extern void regcache_save (struct regcache *dst,
+ regcache_cooked_read_ftype *cooked_read,
+ void *src);
+extern void regcache_restore (struct regcache *dst,
+ regcache_cooked_read_ftype *cooked_read,
+ void *src);
+
+/* Copy/duplicate the contents of a register cache. By default, the
+ operation is pass-through. Writes to DST and reads from SRC will
+ go through to the target.
+
+ The ``cpy'' functions can not have overlapping SRC and DST buffers.
``no passthrough'' versions do not go through to the target. They
- only save values already in the cache. */
+ only transfer values already in the cache. */
-extern void regcache_save (struct regcache *regcache);
-extern void regcache_restore (struct regcache *regcache);
extern struct regcache *regcache_dup (struct regcache *regcache);
-extern void regcache_save_no_passthrough (struct regcache *regcache);
-extern void regcache_restore_no_passthrough (struct regcache *regcache);
extern struct regcache *regcache_dup_no_passthrough (struct regcache *regcache);
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 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);
projects / deliverable / binutils-gdb.git / blobdiff