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, 13 insertions, 10 deletions

diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 6330ceb..62df614 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -2746,21 +2746,17 @@ i386_convert_register_p (struct gdbarch *gdbarch,
 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
    return its contents in TO.  */
 
-static void
+static int
 i386_register_to_value (struct frame_info *frame, int regnum,
-			struct type *type, gdb_byte *to)
+			struct type *type, gdb_byte *to,
+			int *optimizedp, int *unavailablep)
 {
   struct gdbarch *gdbarch = get_frame_arch (frame);
   int len = TYPE_LENGTH (type);
 
-  /* FIXME: kettenis/20030609: What should we do if REGNUM isn't
-     available in FRAME (i.e. if it wasn't saved)?  */
-
   if (i386_fp_regnum_p (gdbarch, regnum))
-    {
-      i387_register_to_value (frame, regnum, type, to);
-      return;
-    }
+    return i387_register_to_value (frame, regnum, type, to,
+				   optimizedp, unavailablep);
 
   /* Read a value spread across multiple registers.  */
 
@@ -2771,11 +2767,18 @@ i386_register_to_value (struct frame_info *frame, int regnum,
       gdb_assert (regnum != -1);
       gdb_assert (register_size (gdbarch, regnum) == 4);
 
-      get_frame_register (frame, regnum, to);
+      if (!get_frame_register_bytes (frame, regnum, 0,
+				     register_size (gdbarch, regnum),
+				     to, optimizedp, unavailablep))
+	return 0;
+
       regnum = i386_next_regnum (regnum);
       len -= 4;
       to += 4;
     }
+
+  *optimizedp = *unavailablep = 0;
+  return 1;
 }
 
 /* Write the contents FROM of a value of type TYPE into register