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, 22 insertions, 6 deletions

diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index 04ce30a..e5aed94 100644
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -737,9 +737,10 @@ mips_convert_register_p (struct gdbarch *gdbarch,
       || mips_convert_register_gpreg_case_p (gdbarch, regnum, type);
 }
 
-static void
+static int
 mips_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);
 
@@ -747,14 +748,29 @@ mips_register_to_value (struct frame_info *frame, int regnum,
     {
       get_frame_register (frame, regnum + 0, to + 4);
       get_frame_register (frame, regnum + 1, to + 0);
+
+      if (!get_frame_register_bytes (frame, regnum + 0, 0, 4, to + 4,
+				     optimizedp, unavailablep))
+	return 0;
+
+      if (!get_frame_register_bytes (frame, regnum + 1, 0, 4, to + 0,
+				     optimizedp, unavailablep))
+	return 0;
+      *optimizedp = *unavailablep = 0;
+      return 1;
     }
   else if (mips_convert_register_gpreg_case_p (gdbarch, regnum, type))
     {
       int len = TYPE_LENGTH (type);
-      if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
-	get_frame_register_bytes (frame, regnum, 8 - len, len, to);
-      else
-	get_frame_register_bytes (frame, regnum, 0, len, to);
+      CORE_ADDR offset;
+
+      offset = gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG ? 8 - len : 0;
+      if (!get_frame_register_bytes (frame, regnum, offset, len, to,
+				     optimizedp, unavailablep))
+	return 0;
+
+      *optimizedp = *unavailablep = 0;
+      return 1;
     }
   else
     {