gdb/dwarf2loc.h

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