gdb/

	* dwarf2loc.c (read_pieced_value): Handle get_frame_register_bytes
	returning that the register piece is unavailable/optimized out.
	(write_pieced_value): Handle get_frame_register_bytes returning
	that the register piece is unavailable/optimized out when doing a
	read-modify write of a bitfield.
	* findvar.c (value_from_register): Handle get_frame_register_bytes
	returning that the register piece is unavailable/optimized out.
	* frame.c (get_frame_register_bytes): New parameters `optimizedp'
	and `unavailablep'.  Throw error on bad debug info.  Use
	frame_register instead of frame_register_read, to fill in the new
	arguments.
	* frame.h (get_frame_register_bytes): New parameters `optimizedp'
	and `unavailablep'.
	* valops.c: (value_assign): Adjust, and handle
	get_frame_register_bytes failing.
	* spu-tdep.c: Include exceptions.h.
	(spu_software_single_step): Adjust, and handle
	get_frame_register_bytes failing.
	(spu_get_longjmp_target): Ditto.
	* gdbarch.sh (register_to_value): Change to return int.  New
	parameters `optimizedp' and `unavailablep'.
	* gdbarch.h, gdbarch.c: Regenerate.
	* i386-tdep.c (i386_register_to_value): Adjust to new
	gdbarch_register_to_value interface.
	* i387-tdep.c (i387_register_to_value): Ditto.
	* i387-tdep.h (i387_register_to_value): Ditto.
	* alpha-tdep.c (alpha_register_to_value): Ditto.
	* ia64-tdep.c (ia64_register_to_value): Ditto.
	* m68k-tdep.c (m68k_register_to_value): Ditto.
	* mips-tdep.c (mips_register_to_value): Ditto.
	* rs6000-tdep.c (rs6000_register_to_value): Ditto.

1 files changed, 16 insertions, 9 deletions

diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c
index cc49a07..2f309a7 100644
--- a/gdb/alpha-tdep.c
+++ b/gdb/alpha-tdep.c
@@ -239,21 +239,28 @@ alpha_convert_register_p (struct gdbarch *gdbarch, int regno,
 	  && TYPE_LENGTH (type) != 8);
 }
 
-static void
+static int
 alpha_register_to_value (struct frame_info *frame, int regnum,
-			 struct type *valtype, gdb_byte *out)
+			 struct type *valtype, gdb_byte *out,
+			int *optimizedp, int *unavailablep)
 {
+  struct gdbarch *gdbarch = get_frame_arch (frame);
   gdb_byte in[MAX_REGISTER_SIZE];
 
-  frame_register_read (frame, regnum, in);
-  switch (TYPE_LENGTH (valtype))
+  /* Convert to TYPE.  */
+  if (!get_frame_register_bytes (frame, regnum, 0,
+				 register_size (gdbarch, regnum),
+				 in, optimizedp, unavailablep))
+    return 0;
+
+  if (TYPE_LENGTH (valtype) == 4)
     {
-    case 4:
-      alpha_sts (get_frame_arch (frame), out, in);
-      break;
-    default:
-      error (_("Cannot retrieve value from floating point register"));
+      alpha_sts (gdbarch, out, in);
+      *optimizedp = *unavailablep = 0;
+      return 1;
     }
+
+  error (_("Cannot retrieve value from floating point register"));
 }
 
 static void