Convert frame unwinders to use the current frame and

	"struct value".

	* frame.c (frame_debug): Make global.
	(get_frame_id): Pass this frame to unwinder routines.
	(frame_pc_unwind): Remove unused unwind->prev_pc support.
	(do_frame_register_read): Do not discard the return value of
	frame_register_read.
	(frame_register_unwind): Remove debug messages.  Use
	frame_unwind_register_value.
	(frame_unwind_register_value, get_frame_register_value): New
	functions.
	(create_new_frame, get_frame_base_address, get_frame_locals_address)
	(get_frame_args_address, get_frame_type): Pass this frame to
	unwinder routines.
	(frame_cleanup_after_sniffer, frame_prepare_for_sniffer): New
	functions.
	* frame.h: Update comments.
	(frame_debug, frame_unwind_register_value, get_frame_register_value)
	(frame_prepare_for_sniffer): Declare.
	* frame-unwind.h: Update comments and parameter names.
	(default_frame_sniffer): Declare.
	(frame_prev_register_ftype): Return a struct value *.
	(struct frame_unwind): Remove prev_pc member.
	(frame_unwind_sniffer_ftype, frame_unwind_append_sniffer): Delete.
	(frame_unwind_append_unwinder, frame_unwind_got_optimized)
	(frame_unwind_got_register, frame_unwind_got_memory)
	(frame_unwind_got_constant, frame_unwind_got_address): Declare.
	* frame-base.h: Update comments and parameter names.
	* valops.c (value_fetch_lazy): Use get_frame_register_value.  Iterate
	if necessary.  Add debugging output.
	* sentinel-frame.c (sentinel_frame_prev_register)
	(sentinel_frame_this_id): Update for new signature.
	(sentinel_frame_prev_pc): Delete.
	(sentinel_frame_unwinder): Remove prev_pc.
	* ia64-tdep.c (ia64_libunwind_frame_unwind): Do not initialize
	prev_pc.
	* libunwind-frame.c (libunwind_frame_unwind): Likewise.
	* frame-unwind.c (struct frame_unwind_table_entry): Remove sniffer.
	(frame_unwind_append_sniffer): Delete.
	(frame_unwind_append_unwinder): New function.
	(frame_unwind_find_by_frame): Take this frame.  Only use sniffers
	from unwinders.  Use frame_prepare_for_sniffer.
	(default_frame_sniffer, frame_unwind_got_optimized)
	(frame_unwind_got_register, frame_unwind_got_memory)
	(frame_unwind_got_constant, frame_unwind_got_address): New functions.
	* dummy-frame.c (dummy_frame_sniffer): Use gdbarch_dummy_id.
	(dummy_frame_prev_register, dummy_frame_this_id): Update for new
	signature.
	* gdbarch.sh: Replace unwind_dummy_id with dummy_id.
	* gdbarch.c, gdbarch.c: Regenerated.
	* frame-base.c (default_frame_base_address)
	(default_frame_locals_address, default_frame_args_address): Update
	for new signature.
	(frame_base_find_by_frame): Pass this frame to unwinder routines.
	* infcall.c (call_function_by_hand): Update comments.
	* Makefile.in (frame-unwind.o): Update dependencies.

	* gdbint.texinfo (Stack Frames): New chapter.
	(Algorithms): Move Frames text to the new chapter.
	(Target Conditionals): Delete SAVE_DUMMY_FRAME_TOS.  Document
	gdbarch_dummy_id instead of gdbarch_unwind_dummy_id.

1 files changed, 3 insertions, 3 deletions

diff --git a/gdb/infcall.c b/gdb/infcall.c
index ca4785e..c065b59 100644
--- a/gdb/infcall.c
+++ b/gdb/infcall.c
@@ -462,7 +462,7 @@ call_function_by_hand (struct value *function, int nargs, struct value **args)
 	 pushed) GDB won't be able to correctly perform back traces.
 	 If a target is having trouble with backtraces, first thing to
 	 do is add FRAME_ALIGN() to the architecture vector. If that
-	 fails, try unwind_dummy_id().
+	 fails, try dummy_id().
 
          If the ABI specifies a "Red Zone" (see the doco) the code
          below will quietly trash it.  */
@@ -656,7 +656,7 @@ call_function_by_hand (struct value *function, int nargs, struct value **args)
      ID so that the breakpoint code can correctly re-identify the
      dummy breakpoint.  */
   /* Sanity.  The exact same SP value is returned by PUSH_DUMMY_CALL,
-     saved as the dummy-frame TOS, and used by unwind_dummy_id to form
+     saved as the dummy-frame TOS, and used by dummy_id to form
      the frame ID's stack address.  */
   dummy_id = frame_id_build (sp, bp_addr);
 
@@ -671,7 +671,7 @@ call_function_by_hand (struct value *function, int nargs, struct value **args)
     sal.section = find_pc_overlay (sal.pc);
     /* Sanity.  The exact same SP value is returned by
        PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
-       unwind_dummy_id to form the frame ID's stack address.  */
+       dummy_id to form the frame ID's stack address.  */
     bpt = set_momentary_breakpoint (sal, dummy_id, bp_call_dummy);
     bpt->disposition = disp_del;
   }