contrib/gdb-6.2.1/gdb/dwarf2loc.h

   1 /* Dwarf2 location expression support for GDB.
   2    Copyright 2003 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #if !defined (DWARF2LOC_H)
  22 #define DWARF2LOC_H
  23
  24 struct symbol_ops;
  25
  26 /* This header is private to the DWARF-2 reader.  It is shared between
  27    dwarf2read.c and dwarf2loc.c.  */
  28
  29 /* The symbol location baton types used by the DWARF-2 reader (i.e.
  30    SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol).  "struct
  31    dwarf2_locexpr_baton" is for a symbol with a single location
  32    expression; "struct dwarf2_loclist_baton" is for a symbol with a
  33    location list.  */
  34
  35 struct dwarf2_locexpr_baton
  36 {
  37   /* Pointer to the start of the location expression.  */
  38   unsigned char *data;
  39
  40   /* Length of the location expression.  */
  41   unsigned short size;
  42
  43   /* The objfile containing the symbol whose location we're computing.  */
  44   struct objfile *objfile;
  45 };
  46
  47 struct dwarf2_loclist_baton
  48 {
  49   /* The initial base address for the location list, based on the compilation
  50      unit.  */
  51   CORE_ADDR base_address;
  52
  53   /* Pointer to the start of the location list.  */
  54   unsigned char *data;
  55
  56   /* Length of the location list.  */
  57   unsigned short size;
  58
  59   /* The objfile containing the symbol whose location we're computing.  */
  60   /* Used (only???) by thread local variables.  The objfile in which
  61      this symbol is defined.  To find a thread-local variable (e.g., a
  62      variable declared with the `__thread' storage class), we may need
  63      to know which object file it's in.  */
  64   struct objfile *objfile;
  65 };
  66
  67 extern const struct symbol_ops dwarf2_locexpr_funcs;
  68 extern const struct symbol_ops dwarf2_loclist_funcs;
  69
  70 #endif