dwarf2dbg.h revision 130561 
1/* dwarf2dbg.h - DWARF2 debug support
2   Copyright 1999, 2000 Free Software Foundation, Inc.
3
4   This file is part of GAS, the GNU Assembler.
5
6   GAS 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, or (at your option)
9   any later version.
10
11   GAS 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 GAS; see the file COPYING.  If not, write to the Free
18   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
19   02111-1307, USA.  */
20
21#ifndef AS_DWARF2DBG_H
22#define AS_DWARF2DBG_H
23
24#include "as.h"
25
26#define DWARF2_FLAG_BEGIN_STMT	(1 << 0)	/* beginning of statement */
27#define DWARF2_FLAG_BEGIN_BLOCK	(1 << 1)	/* beginning of basic block */
28
29struct dwarf2_line_info {
30  unsigned int filenum;
31  unsigned int line;
32  unsigned int column;
33  unsigned int flags;
34};
35
36/* Implements the .file FILENO "FILENAME" directive.  FILENO can be 0
37   to indicate that no file number has been assigned.  All real file
38   number must be >0.  */
39extern char *dwarf2_directive_file (int dummy);
40
41/* Implements the .loc FILENO LINENO [COLUMN] directive.  FILENO is
42   the file number, LINENO the line number and the (optional) COLUMN
43   the column of the source code that the following instruction
44   corresponds to.  FILENO can be 0 to indicate that the filename
45   specified by the textually most recent .file directive should be
46   used.  */
47extern void dwarf2_directive_loc (int dummy);
48
49/* Returns the current source information.  If .file directives have
50   been encountered, the info for the corresponding source file is
51   returned.  Otherwise, the info for the assembly source file is
52   returned.  */
53extern void dwarf2_where (struct dwarf2_line_info *l);
54
55/* This function generates .debug_line info based on the address and
56   source information passed in the arguments.  ADDR should be the
57   frag-relative offset of the instruction the information is for and
58   L is the source information that should be associated with that
59   address.  */
60extern void dwarf2_gen_line_info (addressT addr, struct dwarf2_line_info *l);
61
62/* Must be called for each generated instruction.  */
63extern void dwarf2_emit_insn (int);
64
65extern void dwarf2_finish (void);
66
67extern int dwarf2dbg_estimate_size_before_relax (fragS *);
68extern int dwarf2dbg_relax_frag (fragS *);
69extern void dwarf2dbg_convert_frag (fragS *);
70
71/* An enumeration which describes the sizes of offsets (to DWARF sections)
72   and the mechanism by which the size is indicated.  */
73enum dwarf2_format {
74  /* 32-bit format: the initial length field is 4 bytes long.  */
75  dwarf2_format_32bit,
76  /* DWARF3 64-bit format: the representation of the initial length
77     (of a DWARF section) is 0xffffffff (4 bytes) followed by eight
78     bytes indicating the actual length.  */
79  dwarf2_format_64bit,
80  /* SGI extension to DWARF2: The initial length is eight bytes.  */
81  dwarf2_format_64bit_irix
82};
83
84#endif /* AS_DWARF2DBG_H */
85