gdb/

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

diff --git a/gdb/dwarf2loc.h b/gdb/dwarf2loc.h
index fde132922ac4a5fb94fd63fb0c229ed955c28389..5b6ebe20b821f5c6c7d07c6fbd0cf6da37a41e14 100644 (file)
--- a/gdb/dwarf2loc.h
+++ b/gdb/dwarf2loc.h
@@ -1,5 +1,6 @@
-/* Dwarf2 location expression support for GDB.
-   Copyright 2003 Free Software Foundation, Inc.
+/* DWARF 2 location expression support for GDB.
+
+   Copyright (C) 2003, 2005 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -15,25 +16,56 @@
 
    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.  */
+   Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #if !defined (DWARF2LOC_H)
 #define DWARF2LOC_H
 
+struct symbol_ops;
+
 /* 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).  */
+/* 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;
+  /* Pointer to the start of the location expression.  */
+  gdb_byte *data;
+
+  /* Length of the location expression.  */
+  unsigned short size;
+
+  /* The objfile containing the symbol whose location we're computing.  */
+  struct objfile *objfile;
+};
+
+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.  */
+  gdb_byte *data;
+
+  /* Length of the location list.  */
   unsigned short size;
+
+  /* The objfile containing the symbol whose location we're computing.  */
+  /* Used (only???) by thread local variables.  The objfile in which
+     this symbol is defined.  To find a thread-local variable (e.g., a
+     variable declared with the `__thread' storage class), we may need
+     to know which object file it's in.  */
   struct objfile *objfile;
 };
 
-extern struct location_funcs dwarf2_locexpr_funcs;
+extern const struct symbol_ops dwarf2_locexpr_funcs;
+extern const struct symbol_ops dwarf2_loclist_funcs;
 
-#endif
+#endif /* dwarf2loc.h */