gdb: Move get_frame_language from stack.c to frame.c.

The get_frame_language feels like it would be more at home in frame.c
rather than in stack.c, while the declaration, that is currently in
language.h can be moved into frame.h to match.

A couple of new includes are added, but otherwise no substantial change
here.

gdb/ChangeLog:

	* stack.c (get_frame_language): Moved ...
	* frame.c (get_frame_language): ... to here.
	* language.h (get_frame_language): Declaration moved to frame.h.
	* frame.h: Add language.h include, for language enum.
	(get_frame_language): Declaration moved from language.h.
	* language.c: Add frame.h include.
	* top.c: Add frame.h include.
	* symtab.h (struct obj_section): Declare.
	(struct cmd_list_element): Declare.

gdb/ChangeLog

@@ -1,3 +1,15 @@
+2015-08-07  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* stack.c (get_frame_language): Moved ...
+	* frame.c (get_frame_language): ... to here.
+	* language.h (get_frame_language): Declaration moved to frame.h.
+	* frame.h: Add language.h include, for language enum.
+	(get_frame_language): Declaration moved from language.h.
+	* language.c: Add frame.h include.
+	* top.c: Add frame.h include.
+	* symtab.h (struct obj_section): Declare.
+	(struct cmd_list_element): Declare.
+
 2015-08-07  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* language.c (show_language_command): Find selected frame before

gdb/frame.c

@@ -2571,6 +2571,48 @@ frame_unwind_caller_arch (struct frame_info *next_frame)
   return frame_unwind_arch (skip_artificial_frames (next_frame));
 }
 
+/* Gets the language of FRAME.  */
+
+enum language
+get_frame_language (struct frame_info *frame)
+{
+  CORE_ADDR pc = 0;
+  int pc_p = 0;
+
+  gdb_assert (frame!= NULL);
+
+    /* We determine the current frame language by looking up its
+       associated symtab.  To retrieve this symtab, we use the frame
+       PC.  However we cannot use the frame PC as is, because it
+       usually points to the instruction following the "call", which
+       is sometimes the first instruction of another function.  So
+       we rely on get_frame_address_in_block(), it provides us with
+       a PC that is guaranteed to be inside the frame's code
+       block.  */
+
+  TRY
+    {
+      pc = get_frame_address_in_block (frame);
+      pc_p = 1;
+    }
+  CATCH (ex, RETURN_MASK_ERROR)
+    {
+      if (ex.error != NOT_AVAILABLE_ERROR)
+	throw_exception (ex);
+    }
+  END_CATCH
+
+  if (pc_p)
+    {
+      struct compunit_symtab *cust = find_pc_compunit_symtab (pc);
+
+      if (cust != NULL)
+	return compunit_language (cust);
+    }
+
+  return language_unknown;
+}
+
 /* Stack pointer methods.  */
 
 CORE_ADDR

gdb/frame.h

@@ -69,6 +69,8 @@
 
    */
 
+#include "language.h"
+
 struct symtab_and_line;
 struct frame_unwind;
 struct frame_base;
@@ -814,4 +816,9 @@ extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
 extern int frame_unwinder_is (struct frame_info *fi,
 			      const struct frame_unwind *unwinder);
 
+/* Return the language of FRAME.  */
+
+extern enum language get_frame_language (struct frame_info *frame);
+
+
 #endif /* !defined (FRAME_H)  */

gdb/language.c

@@ -43,6 +43,7 @@
 #include "demangle.h"
 #include "symfile.h"
 #include "cp-support.h"
+#include "frame.h"
 
 extern void _initialize_language (void);
 

gdb/language.h

@@ -544,8 +544,6 @@ extern const char *language_str (enum language);
 
 extern void add_language (const struct language_defn *);
 
-extern enum language get_frame_language (struct frame_info *frame);	/* In stack.c */
-
 /* Check for a language-specific trampoline.  */
 
 extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);

gdb/stack.c

@@ -2559,48 +2559,6 @@ func_command (char *arg, int from_tty)
   else if (frame != get_selected_frame (NULL))
     select_and_print_frame (frame);
 }
-
-/* Gets the language of FRAME.  */
-
-enum language
-get_frame_language (struct frame_info *frame)
-{
-  CORE_ADDR pc = 0;
-  int pc_p = 0;
-
-  gdb_assert (frame!= NULL);
-
-    /* We determine the current frame language by looking up its
-       associated symtab.  To retrieve this symtab, we use the frame
-       PC.  However we cannot use the frame PC as is, because it
-       usually points to the instruction following the "call", which
-       is sometimes the first instruction of another function.  So
-       we rely on get_frame_address_in_block(), it provides us with
-       a PC that is guaranteed to be inside the frame's code
-       block.  */
-
-  TRY
-    {
-      pc = get_frame_address_in_block (frame);
-      pc_p = 1;
-    }
-  CATCH (ex, RETURN_MASK_ERROR)
-    {
-      if (ex.error != NOT_AVAILABLE_ERROR)
-	throw_exception (ex);
-    }
-  END_CATCH
-
-  if (pc_p)
-    {
-      struct compunit_symtab *cust = find_pc_compunit_symtab (pc);
-
-      if (cust != NULL)
-	return compunit_language (cust);
-    }
-
-  return language_unknown;
-}
 
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */

gdb/symtab.h

@@ -38,6 +38,8 @@ struct program_space;
 struct language_defn;
 struct probe;
 struct common_block;
+struct obj_section;
+struct cmd_list_element;
 
 /* Some of the structures in this file are space critical.
    The space-critical structures are:

gdb/top.c

@@ -49,6 +49,7 @@
 #include "observer.h"
 #include "maint.h"
 #include "filenames.h"
+#include "frame.h"
 
 /* readline include files.  */
 #include "readline/readline.h"