X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fframe-unwind.h;h=9543dddd62632ab9c36181379590f53f6e8e11e8;hb=7abb8d81115a2a748443f041e37cc13a70b34faa;hp=f82d76366bb26c8ad088728bdf305b6ded60723a;hpb=0b30217134add051e159a192066a1e568ebd837f;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
index f82d76366b..9543dddd62 100644
--- a/gdb/frame-unwind.h
+++ b/gdb/frame-unwind.h
@@ -1,6 +1,6 @@
 /* Definitions for a frame unwinder, for GDB, the GNU debugger.
 
-   Copyright (C) 2003-2004, 2007-2012 Free Software Foundation, Inc.
+   Copyright (C) 2003-2019 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -44,7 +44,10 @@ struct value;
 
 /* Given THIS frame, take a whiff of its registers (namely
    the PC and attributes) and if SELF is the applicable unwinder,
-   return non-zero.  Possibly also initialize THIS_PROLOGUE_CACHE.  */
+   return non-zero.  Possibly also initialize THIS_PROLOGUE_CACHE; but
+   only if returning 1.  Initializing THIS_PROLOGUE_CACHE in other
+   cases (0 return) is invalid.  In case of exception, the caller has
+   to set *THIS_PROLOGUE_CACHE to NULL.  */
 
 typedef int (frame_sniffer_ftype) (const struct frame_unwind *self,
 				   struct frame_info *this_frame,
@@ -67,6 +70,18 @@ enum unwind_stop_reason
   default_frame_unwind_stop_reason (struct frame_info *this_frame,
 				    void **this_cache);
 
+/* A default unwind_pc callback that simply unwinds the register identified
+   by GDBARCH_PC_REGNUM.  */
+
+extern CORE_ADDR default_unwind_pc (struct gdbarch *gdbarch,
+				    struct frame_info *next_frame);
+
+/* A default unwind_sp callback that simply unwinds the register identified
+   by GDBARCH_SP_REGNUM.  */
+
+extern CORE_ADDR default_unwind_sp (struct gdbarch *gdbarch,
+				    struct frame_info *next_frame);
+
 /* Assuming the frame chain: (outer) prev <-> this <-> next (inner);
    use THIS frame, and through it the NEXT frame's register unwind
    method, to determine the frame ID of THIS frame.