* i386-tdep.c (i386_frame_chain): New function.

* config/i386/tm-i386.h (FRAME_CHAIN): Redefine in terms of
i386_frame_chain.
(i386_frame_chain): New prototype.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2001-04-16  Mark Kettenis  <kettenis@gnu.org>
+
+	* i386-tdep.c (i386_frame_chain): New function.
+	* config/i386/tm-i386.h (FRAME_CHAIN): Redefine in terms of
+	i386_frame_chain.
+	(i386_frame_chain): New prototype.
+
 2001-04-14  J.T. Conklin  <jtc@redback.com>
 	
 	* target.h (target_ops): Removed to_core_file_to_sym_file vector

gdb/config/i386/tm-i386.h

@@ -323,17 +323,12 @@ extern CORE_ADDR i386_extract_struct_value_address (char *regbuf);
    from the sigcontext structure which is pushed by the kernel on the
    user stack, along with a pointer to it.  */
 
-/* FRAME_CHAIN takes a frame's nominal address and produces the frame's
-   chain-pointer.
-   In the case of the i386, the frame's nominal address
-   is the address of a 4-byte word containing the calling frame's address.  */
-
-#define FRAME_CHAIN(thisframe)  \
-  ((thisframe)->signal_handler_caller \
-   ? (thisframe)->frame \
-   : (!inside_entry_file ((thisframe)->pc) \
-      ? read_memory_unsigned_integer ((thisframe)->frame, 4) \
-      : 0))
+/* Return the chain-pointer for FRAME.  In the case of the i386, the
+   frame's nominal address is the address of a 4-byte word containing
+   the calling frame's address.  */
+
+#define FRAME_CHAIN(frame) i386_frame_chain ((frame))
+extern CORE_ADDR i386_frame_chain (struct frame_info *frame);
 
 /* A macro that tells us whether the function invocation represented
    by FI does not have a frame on the stack associated with it.  If it

gdb/i386-tdep.c

@@ -349,6 +349,22 @@ i386_get_frame_setup (CORE_ADDR pc)
   return (-1);
 }
 
+/* Return the chain-pointer for FRAME.  In the case of the i386, the
+   frame's nominal address is the address of a 4-byte word containing
+   the calling frame's address.  */
+
+CORE_ADDR
+i386_frame_chain (struct frame_info *frame)
+{
+  if (frame->signal_handler_caller)
+    return frame->frame;
+
+  if (! inside_entry_file (frame->pc))
+    return read_memory_unsigned_integer (frame->frame, 4);
+
+  return 0;
+}
+
 /* Return number of args passed to a frame.
    Can return -1, meaning no way to tell.  */