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

diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
index 9ffafffb26fb742b239c581f04b97fb93df45a04..c4518b558e189c7b9d9b309eb7e24e654965e8f2 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 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2007, 2008, 2009 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 called with the next frame's `struct
-   frame_info' and and this frame's prologue cache.
+   functions are called with the next frame's `struct frame_info'
+   and this frame's prologue cache.
 
    THIS frame's register values can be obtained by unwinding NEXT
    frame's registers (a recursive operation).
@@ -121,6 +121,13 @@ 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
@@ -133,6 +140,7 @@ struct frame_unwind
   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
@@ -183,6 +191,13 @@ struct value *frame_unwind_got_memory (struct frame_info *frame, int regnum,
 struct value *frame_unwind_got_constant (struct frame_info *frame, int regnum,
                                         ULONGEST val);
 
+/* Return a value which indicates that FRAME's saved version of
+   REGNUM has a known constant (computed) value which is stored
+   inside BUF.  */
+
+struct value *frame_unwind_got_bytes (struct frame_info *frame, int regnum,
+                                      gdb_byte *buf);
+
 /* Return a value which indicates that FRAME's saved version of REGNUM
    has a known constant (computed) value of ADDR.  Convert the
    CORE_ADDR to a target address if necessary.  */