gdb/dwarf2loc.h

   1 /* DWARF 2 location expression support for GDB.
   2
   3    Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #if !defined (DWARF2LOC_H)
  22 #define DWARF2LOC_H
  23
  24 struct symbol_computed_ops;
  25 struct objfile;
  26 struct dwarf2_per_cu_data;
  27
  28 /* This header is private to the DWARF-2 reader.  It is shared between
  29    dwarf2read.c and dwarf2loc.c.  */
  30
  31 /* Return the OBJFILE associated with the compilation unit CU.  */
  32 struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu);
  33
  34 /* Return the address size given in the compilation unit header for CU.  */
  35 CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu);
  36
  37 /* The symbol location baton types used by the DWARF-2 reader (i.e.
  38    SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol).  "struct
  39    dwarf2_locexpr_baton" is for a symbol with a single location
  40    expression; "struct dwarf2_loclist_baton" is for a symbol with a
  41    location list.  */
  42
  43 struct dwarf2_locexpr_baton
  44 {
  45   /* Pointer to the start of the location expression.  */
  46   const gdb_byte *data;
  47
  48   /* Length of the location expression.  */
  49   unsigned long size;
  50
  51   /* The compilation unit containing the symbol whose location
  52      we're computing.  */
  53   struct dwarf2_per_cu_data *per_cu;
  54 };
  55
  56 struct dwarf2_loclist_baton
  57 {
  58   /* The initial base address for the location list, based on the compilation
  59      unit.  */
  60   CORE_ADDR base_address;
  61
  62   /* Pointer to the start of the location list.  */
  63   const gdb_byte *data;
  64
  65   /* Length of the location list.  */
  66   unsigned long size;
  67
  68   /* The compilation unit containing the symbol whose location
  69      we're computing.  */
  70   struct dwarf2_per_cu_data *per_cu;
  71 };
  72
  73 extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
  74 extern const struct symbol_computed_ops dwarf2_loclist_funcs;
  75
  76 #endif /* dwarf2loc.h */