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
24struct 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
35struct 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 long size;
42
43  /* The objfile containing the symbol whose location we're computing.  */
44  struct objfile *objfile;
45};
46
47struct 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 long 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
67extern const struct symbol_ops dwarf2_locexpr_funcs;
68extern const struct symbol_ops dwarf2_loclist_funcs;
69
70#endif
71