gdb/

	Code cleanup.
	* dwarf2-frame.c (dwarf2_frame_ctx_funcs): New.
	(execute_stack_op): Use dwarf2_frame_ctx_funcs
	* dwarf2expr.c (dwarf_get_base_type): Access get_base_type via funcs.
	(execute_stack_op): Access read_reg, get_frame_base, read_mem,
	get_frame_cfa, get_tls_address and dwarf_call via funcs.
	* dwarf2expr.h (struct dwarf_expr_context): New forward declaration.
	(struct dwarf_expr_context_funcs): New, move here methods from ...
	(struct dwarf_expr_context): ... here.  New fields funcs.
	* dwarf2loc.c (dwarf_expr_dwarf_call): Access get_frame_pc via funcs.
	(dwarf_expr_ctx_funcs): New.
	(dwarf2_evaluate_loc_desc_full): Use dwarf_expr_ctx_funcs.
	(needs_frame_dwarf_call): Access get_frame_pc via funcs.
	(needs_frame_ctx_funcs): New.
	(dwarf2_loc_desc_needs_frame): Use needs_frame_ctx_funcs.

1 files changed, 49 insertions, 39 deletions

diff --git a/gdb/dwarf2expr.h b/gdb/dwarf2expr.h
index 676b54bfff2..987f295600c 100644
--- a/gdb/dwarf2expr.h
+++ b/gdb/dwarf2expr.h
@@ -23,6 +23,53 @@
 #if !defined (DWARF2EXPR_H)
 #define DWARF2EXPR_H
 
+struct dwarf_expr_context;
+
+/* Virtual method table for struct dwarf_expr_context below.  */
+
+struct dwarf_expr_context_funcs
+{
+  /* Return the value of register number REGNUM.  */
+  CORE_ADDR (*read_reg) (void *baton, int regnum);
+
+  /* Read LENGTH bytes at ADDR into BUF.  */
+  void (*read_mem) (void *baton, gdb_byte *buf, CORE_ADDR addr, size_t length);
+
+  /* Return the location expression for the frame base attribute, in
+     START and LENGTH.  The result must be live until the current
+     expression evaluation is complete.  */
+  void (*get_frame_base) (void *baton, const gdb_byte **start, size_t *length);
+
+  /* Return the CFA for the frame.  */
+  CORE_ADDR (*get_frame_cfa) (void *baton);
+
+  /* Return the PC for the frame.  */
+  CORE_ADDR (*get_frame_pc) (void *baton);
+
+  /* Return the thread-local storage address for
+     DW_OP_GNU_push_tls_address.  */
+  CORE_ADDR (*get_tls_address) (void *baton, CORE_ADDR offset);
+
+  /* Execute DW_AT_location expression for the DWARF expression subroutine in
+     the DIE at DIE_OFFSET in the CU from CTX.  Do not touch STACK while it
+     being passed to and returned from the called DWARF subroutine.  */
+  void (*dwarf_call) (struct dwarf_expr_context *ctx, size_t die_offset);
+
+  /* Return the base type given by the indicated DIE.  This can throw
+     an exception if the DIE is invalid or does not represent a base
+     type.  If can also be NULL in the special case where the
+     callbacks are not performing evaluation, and thus it is
+     meaningful to substitute a stub type of the correct size.  */
+  struct type *(*get_base_type) (struct dwarf_expr_context *ctx, size_t die);
+
+#if 0
+  /* Not yet implemented.  */
+
+  /* Return the `object address' for DW_OP_push_object_address.  */
+  CORE_ADDR (*get_object_address) (void *baton);
+#endif
+};
+
 /* The location of a value.  */
 enum dwarf_value_location
 {
@@ -85,45 +132,8 @@ struct dwarf_expr_context
      to all of the callback functions.  */
   void *baton;
 
-  /* Return the value of register number REGNUM.  */
-  CORE_ADDR (*read_reg) (void *baton, int regnum);
-
-  /* Read LENGTH bytes at ADDR into BUF.  */
-  void (*read_mem) (void *baton, gdb_byte *buf, CORE_ADDR addr, size_t length);
-
-  /* Return the location expression for the frame base attribute, in
-     START and LENGTH.  The result must be live until the current
-     expression evaluation is complete.  */
-  void (*get_frame_base) (void *baton, const gdb_byte **start, size_t *length);
-
-  /* Return the CFA for the frame.  */
-  CORE_ADDR (*get_frame_cfa) (void *baton);
-
-  /* Return the PC for the frame.  */
-  CORE_ADDR (*get_frame_pc) (void *baton);
-
-  /* Return the thread-local storage address for
-     DW_OP_GNU_push_tls_address.  */
-  CORE_ADDR (*get_tls_address) (void *baton, CORE_ADDR offset);
-
-  /* Execute DW_AT_location expression for the DWARF expression subroutine in
-     the DIE at DIE_OFFSET in the CU from CTX.  Do not touch STACK while it
-     being passed to and returned from the called DWARF subroutine.  */
-  void (*dwarf_call) (struct dwarf_expr_context *ctx, size_t die_offset);
-
-  /* Return the base type given by the indicated DIE.  This can throw
-     an exception if the DIE is invalid or does not represent a base
-     type.  If can also be NULL in the special case where the
-     callbacks are not performing evaluation, and thus it is
-     meaningful to substitute a stub type of the correct size.  */
-  struct type *(*get_base_type) (struct dwarf_expr_context *ctx, size_t die);
-
-#if 0
-  /* Not yet implemented.  */
-
-  /* Return the `object address' for DW_OP_push_object_address.  */
-  CORE_ADDR (*get_object_address) (void *baton);
-#endif
+  /* Callback functions.  */
+  const struct dwarf_expr_context_funcs *funcs;
 
   /* The current depth of dwarf expression recursion, via DW_OP_call*,
      DW_OP_fbreg, DW_OP_push_object_address, etc., and the maximum