gdb/

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

diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
index 35eeebf56cc96351ee0ab113648166822497170a..f82d76366bb26c8ad088728bdf305b6ded60723a 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, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2003-2004, 2007-2012 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -32,8 +32,8 @@ struct value;
 
 /* The following unwind functions assume a chain of frames forming the
    sequence: (outer) prev <-> this <-> next (inner).  All the
-   functions are called with the next frame's `struct frame_info'
-   and this frame's prologue cache.
+   functions are called with this frame's `struct frame_info' and
+   prologue cache.
 
    THIS frame's register values can be obtained by unwinding NEXT
    frame's registers (a recursive operation).
@@ -50,6 +50,9 @@ typedef int (frame_sniffer_ftype) (const struct frame_unwind *self,
                                   struct frame_info *this_frame,
                                   void **this_prologue_cache);
 
+typedef enum unwind_stop_reason (frame_unwind_stop_reason_ftype)
+  (struct frame_info *this_frame, void **this_prologue_cache);
+
 /* A default frame sniffer which always accepts the frame.  Used by
    fallback prologue unwinders.  */
 
@@ -57,6 +60,13 @@ int default_frame_sniffer (const struct frame_unwind *self,
                           struct frame_info *this_frame,
                           void **this_prologue_cache);
 
+/* A default stop_reason callback which always claims the frame is
+   unwindable.  */
+
+enum unwind_stop_reason
+  default_frame_unwind_stop_reason (struct frame_info *this_frame,
+                                   void **this_cache);
+
 /* 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.
@@ -121,6 +131,13 @@ typedef struct value * (frame_prev_register_ftype)
 typedef void (frame_dealloc_cache_ftype) (struct frame_info *self,
                                          void *this_cache);
 
+/* Assuming the frame chain: (outer) prev <-> this <-> next (inner);
+   use THIS frame, and implicitly the NEXT frame's register unwind
+   method, return PREV frame's architecture.  */
+
+typedef struct gdbarch *(frame_prev_arch_ftype) (struct frame_info *this_frame,
+                                                void **this_prologue_cache);
+
 struct frame_unwind
 {
   /* The frame's type.  Should this instead be a collection of
@@ -128,21 +145,23 @@ struct frame_unwind
   enum frame_type type;
   /* Should an attribute indicating the frame's address-in-block go
      here?  */
+  frame_unwind_stop_reason_ftype *stop_reason;
   frame_this_id_ftype *this_id;
   frame_prev_register_ftype *prev_register;
   const struct frame_data *unwind_data;
   frame_sniffer_ftype *sniffer;
   frame_dealloc_cache_ftype *dealloc_cache;
+  frame_prev_arch_ftype *prev_arch;
 };
 
 /* Register a frame unwinder, _prepending_ it to the front of the
    search list (so it is sniffed before previously registered
    unwinders).  By using a prepend, later calls can install unwinders
    that override earlier calls.  This allows, for instance, an OSABI
-   to install a a more specific sigtramp unwinder that overrides the
+   to install a more specific sigtramp unwinder that overrides the
    traditional brute-force unwinder.  */
-extern void frame_unwind_prepend_unwinder (struct gdbarch *gdbarch,
-                                          const struct frame_unwind *unwinder);
+extern void frame_unwind_prepend_unwinder (struct gdbarch *,
+                                          const struct frame_unwind *);
 
 /* Add a frame sniffer to the list.  The predicates are polled in the
    order that they are appended.  The initial list contains the dummy
@@ -151,11 +170,12 @@ extern void frame_unwind_prepend_unwinder (struct gdbarch *gdbarch,
 extern void frame_unwind_append_unwinder (struct gdbarch *gdbarch,
                                          const struct frame_unwind *unwinder);
 
-/* Iterate through sniffers for THIS frame until one returns with an
-   unwinder implementation.  Possibly initialize THIS_CACHE.  */
+/* Iterate through sniffers for THIS_FRAME frame until one returns with an
+   unwinder implementation.  THIS_FRAME->UNWIND must be NULL, it will get set
+   by this function.  Possibly initialize THIS_CACHE.  */
 
-extern const struct frame_unwind *frame_unwind_find_by_frame (struct frame_info *this_frame,
-                                                             void **this_cache);
+extern void frame_unwind_find_by_frame (struct frame_info *this_frame,
+                                       void **this_cache);
 
 /* Helper functions for value-based register unwinding.  These return
    a (possibly lazy) value of the appropriate type.  */