2003-03-17 Andrew Cagney <cagney@redhat.com>

	Fix frame off-by-one bug.
	* frame-unwind.h (frame_this_id_ftype): Replace
	frame_unwind_id_ftype.
	(frame_prev_register_ftype): Replace frame_unwind_reg_ftype.
	(struct frame_unwind): Replace "id" with "this_id".  Replace "reg"
	with "prev_register".
	* frame-unwind.c (frame_unwind_find_by_pc): Return
	legacy_saved_regs_unwind instead of trad_frame_unwind.  Update
	comment.
	* dummy-frame.c (cached_find_dummy_frame): Delete function.
	(dummy_frame_this_id): Replace dummy_frame_id_unwind.
	(dummy_frame_prev_register): Replace dummy_frame_register_unwind.
	(dummy_frame_unwind): Update.
	* sentinel-frame.c (sentinel_frame_prev_register): Replace
	sentinel_frame_register_unwind.
	(sentinel_frame_this_id): Replace sentinel_frame_id_unwind.
	(sentinel_frame_unwinder): Update.
	* frame.h (legacy_saved_regs_unwind): Replace trad_frame_unwind.
	(struct frame_info): Rename "unwind_cache" to "prologue_cache".
	* frame.c (create_sentinel_frame): Update. Initialize
	"prologue_cache" instead of "unwind_cache".
	(frame_register_unwind): Call this frame's prev_register with the
	next frame and this frame's prologue cache.
	(get_prev_frame): Simplify.  Always call prev frame's this_id with
	this frame and prev frame's prologue cache.  Document that this
	call is shifted one to the left when compared to the
	frame_register_unwind call.
	(legacy_saved_regs_prev_register): Replace
	frame_saved_regs_register_unwind.
	(legacy_saved_regs_this_id): Replace frame_saved_regs_id_unwind.
	(legacy_saved_regs_unwinder): Replace trad_frame_unwinder.
	(legacy_saved_regs_unwind): Replace trad_frame_unwind.
	* d10v-tdep.c (d10v_frame_this_id): Replace d10v_frame_id_unwind.
	(d10v_frame_unwind): Update.
	(d10v_frame_prev_register): Replace d10v_frame_register_unwind.
	(d10v_frame_unwind_cache): Replace this "fi" with "next_frame".
	(saved_regs_unwinder): Replace this "frame" with "next_frame", and
	"saved_regs" with "this_saved_regs".

1 files changed, 6 insertions, 5 deletions

diff --git a/gdb/frame.h b/gdb/frame.h
index c4905dd..ee0fc7e 100644
--- a/gdb/frame.h
+++ b/gdb/frame.h
@@ -27,8 +27,9 @@ struct symtab_and_line;
 struct frame_unwind;
 struct block;
 
-/* The traditional frame unwinder.  */
-extern const struct frame_unwind *trad_frame_unwind;
+/* A legacy unwinder to prop up architectures using the old style
+   saved regs array.  */
+extern const struct frame_unwind *legacy_saved_regs_unwind;
 
 /* The frame object.  */
 
@@ -397,9 +398,9 @@ struct frame_info
        related unwind data.  */
     struct context *context;
 
-    /* Unwind cache shared between the unwind functions - they had
-       better all agree as to the contents.  */
-    void *unwind_cache;
+    /* Prologue cache shared between the unwind functions.  See
+       "frame-unwind.h" for more information.  */
+    void *prologue_cache;
 
     /* The frame's unwinder.  */
     const struct frame_unwind *unwind;