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