gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / frame-unwind.h

diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
index 0dc9edc72b6d46f91e5363d3724de5a21fbf272f..c80ddc84f291e5d27f4244baa9d00307980984a8 100644 (file)
--- 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) 2003-2016 Free Software Foundation, Inc.
+   Copyright (C) 2003-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -46,7 +46,8 @@ struct value;
    the PC and attributes) and if SELF is the applicable unwinder,
    return non-zero.  Possibly also initialize THIS_PROLOGUE_CACHE; but
    only if returning 1.  Initializing THIS_PROLOGUE_CACHE in other
-   cases (0 return, or exception) is invalid.  */
+   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,
@@ -69,6 +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.