gdb/dwarf2loc.h

   1 /* DWARF 2 location expression support for GDB.
   2
   3    Copyright (C) 2003, 2005, 2007 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 2 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, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #if !defined (DWARF2LOC_H)
  23 #define DWARF2LOC_H
  24
  25 struct symbol_ops;
  26
  27 /* This header is private to the DWARF-2 reader.  It is shared between
  28    dwarf2read.c and dwarf2loc.c.  */
  29
  30 /* The symbol location baton types used by the DWARF-2 reader (i.e.
  31    SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol).  "struct
  32    dwarf2_locexpr_baton" is for a symbol with a single location
  33    expression; "struct dwarf2_loclist_baton" is for a symbol with a
  34    location list.  */
  35
  36 struct dwarf2_locexpr_baton
  37 {
  38   /* Pointer to the start of the location expression.  */
  39   gdb_byte *data;
  40
  41   /* Length of the location expression.  */
  42   unsigned short size;
  43
  44   /* The objfile containing the symbol whose location we're computing.  */
  45   struct objfile *objfile;
  46 };
  47
  48 struct dwarf2_loclist_baton
  49 {
  50   /* The initial base address for the location list, based on the compilation
  51      unit.  */
  52   CORE_ADDR base_address;
  53
  54   /* Pointer to the start of the location list.  */
  55   gdb_byte *data;
  56
  57   /* Length of the location list.  */
  58   unsigned short size;
  59
  60   /* The objfile containing the symbol whose location we're computing.  */
  61   /* Used (only???) by thread local variables.  The objfile in which
  62      this symbol is defined.  To find a thread-local variable (e.g., a
  63      variable declared with the `__thread' storage class), we may need
  64      to know which object file it's in.  */
  65   struct objfile *objfile;
  66 };
  67
  68 extern const struct symbol_ops dwarf2_locexpr_funcs;
  69 extern const struct symbol_ops dwarf2_loclist_funcs;
  70
  71 #endif /* dwarf2loc.h */