2011-01-05 Michael Snyder <msnyder@vmware.com>

[deliverable/binutils-gdb.git] / gdb / dwarf2loc.h

diff --git a/gdb/dwarf2loc.h b/gdb/dwarf2loc.h
index fde132922ac4a5fb94fd63fb0c229ed955c28389..ee5250616080304f0a33616d8d519bc786315e15 100644 (file)
--- a/gdb/dwarf2loc.h
+++ b/gdb/dwarf2loc.h
@@ -1,11 +1,13 @@
-/* Dwarf2 location expression support for GDB.
-   Copyright 2003 Free Software Foundation, Inc.
+/* DWARF 2 location expression support for GDB.
+
+   Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011
+   Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -14,26 +16,94 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #if !defined (DWARF2LOC_H)
 #define DWARF2LOC_H
 
+struct symbol_computed_ops;
+struct objfile;
+struct dwarf2_per_cu_data;
+struct dwarf2_loclist_baton;
+
 /* This header is private to the DWARF-2 reader.  It is shared between
    dwarf2read.c and dwarf2loc.c.  */
 
-/* The symbol location baton type used by the DWARF-2 reader (i.e.
-   SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol).  */
+/* Return the OBJFILE associated with the compilation unit CU.  If CU
+   came from a separate debuginfo file, then the master objfile is
+   returned.  */
+struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu);
+
+/* Return the address size given in the compilation unit header for CU.  */
+CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu);
+
+/* Return the offset size given in the compilation unit header for CU.  */
+int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu);
+
+/* Return the text offset of the CU.  The returned offset comes from
+   this CU's objfile.  If this objfile came from a separate debuginfo
+   file, then the offset may be different from the corresponding
+   offset in the parent objfile.  */
+CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu);
+
+/* Find a particular location expression from a location list.  */
+const gdb_byte *dwarf2_find_location_expression
+  (struct dwarf2_loclist_baton *baton,
+   size_t *locexpr_length,
+   CORE_ADDR pc);
+
+struct dwarf2_locexpr_baton dwarf2_fetch_die_location_block
+  (unsigned int offset, struct dwarf2_per_cu_data *per_cu,
+   CORE_ADDR (*get_frame_pc) (void *baton),
+   void *baton);
+
+/* Evaluate a location description, starting at DATA and with length
+   SIZE, to find the current location of variable of TYPE in the context
+   of FRAME.  */
+
+struct value *dwarf2_evaluate_loc_desc (struct type *type,
+                                       struct frame_info *frame,
+                                       const gdb_byte *data,
+                                       unsigned short size,
+                                       struct dwarf2_per_cu_data *per_cu);
+
+/* The symbol location baton types used by the DWARF-2 reader (i.e.
+   SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol).  "struct
+   dwarf2_locexpr_baton" is for a symbol with a single location
+   expression; "struct dwarf2_loclist_baton" is for a symbol with a
+   location list.  */
 
 struct dwarf2_locexpr_baton
 {
-  unsigned char *data;
-  unsigned short size;
-  struct objfile *objfile;
+  /* Pointer to the start of the location expression.  */
+  const gdb_byte *data;
+
+  /* Length of the location expression.  */
+  unsigned long size;
+
+  /* The compilation unit containing the symbol whose location
+     we're computing.  */
+  struct dwarf2_per_cu_data *per_cu;
+};
+
+struct dwarf2_loclist_baton
+{
+  /* The initial base address for the location list, based on the compilation
+     unit.  */
+  CORE_ADDR base_address;
+
+  /* Pointer to the start of the location list.  */
+  const gdb_byte *data;
+
+  /* Length of the location list.  */
+  unsigned long size;
+
+  /* The compilation unit containing the symbol whose location
+     we're computing.  */
+  struct dwarf2_per_cu_data *per_cu;
 };
 
-extern struct location_funcs dwarf2_locexpr_funcs;
+extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
+extern const struct symbol_computed_ops dwarf2_loclist_funcs;
 
-#endif
+#endif /* dwarf2loc.h */