1/* dwarf2dbg.h - DWARF2 debug support
2   Copyright 1999, 2000, 2002, 2003 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, 51 Franklin Street - Fifth Floor, Boston, MA
19   02110-1301, USA.  */
20
21#ifndef AS_DWARF2DBG_H
22#define AS_DWARF2DBG_H
23
24#include "as.h"
25
26#define DWARF2_FLAG_IS_STMT		(1 << 0)
27#define DWARF2_FLAG_BASIC_BLOCK		(1 << 1)
28#define DWARF2_FLAG_PROLOGUE_END	(1 << 2)
29#define DWARF2_FLAG_EPILOGUE_BEGIN	(1 << 3)
30
31struct dwarf2_line_info {
32  unsigned int filenum;
33  unsigned int line;
34  unsigned int column;
35  unsigned int isa;
36  unsigned int flags;
37};
38
39/* Implements the .file FILENO "FILENAME" directive.  FILENO can be 0
40   to indicate that no file number has been assigned.  All real file
41   number must be >0.  */
42extern char *dwarf2_directive_file (int dummy);
43
44/* Implements the .loc FILENO LINENO [COLUMN] directive.  FILENO is
45   the file number, LINENO the line number and the (optional) COLUMN
46   the column of the source code that the following instruction
47   corresponds to.  FILENO can be 0 to indicate that the filename
48   specified by the textually most recent .file directive should be
49   used.  */
50extern void dwarf2_directive_loc (int dummy);
51
52/* Implements the .loc_mark_labels {0,1} directive.  */
53extern void dwarf2_directive_loc_mark_labels (int dummy);
54
55/* Returns the current source information.  If .file directives have
56   been encountered, the info for the corresponding source file is
57   returned.  Otherwise, the info for the assembly source file is
58   returned.  */
59extern void dwarf2_where (struct dwarf2_line_info *l);
60
61/* A hook to allow the target backend to inform the line number state
62   machine of isa changes when assembler debug info is enabled.  */
63extern void dwarf2_set_isa (unsigned int isa);
64
65/* This function generates .debug_line info based on the address and
66   source information passed in the arguments.  ADDR should be the
67   frag-relative offset of the instruction the information is for and
68   L is the source information that should be associated with that
69   address.  */
70extern void dwarf2_gen_line_info (addressT addr, struct dwarf2_line_info *l);
71
72/* Must be called for each generated instruction.  */
73extern void dwarf2_emit_insn (int);
74
75/* Should be called for each code label.  */
76extern void dwarf2_emit_label (symbolS *);
77
78/* True when we're supposed to set the basic block mark whenever a label
79   is seen.  Unless the target is doing Something Weird, just call
80   dwarf2_emit_label.  */
81extern bfd_boolean dwarf2_loc_mark_labels;
82
83extern void dwarf2_finish (void);
84
85extern int dwarf2dbg_estimate_size_before_relax (fragS *);
86extern int dwarf2dbg_relax_frag (fragS *);
87extern void dwarf2dbg_convert_frag (fragS *);
88
89/* An enumeration which describes the sizes of offsets (to DWARF sections)
90   and the mechanism by which the size is indicated.  */
91enum dwarf2_format {
92  /* 32-bit format: the initial length field is 4 bytes long.  */
93  dwarf2_format_32bit,
94  /* DWARF3 64-bit format: the representation of the initial length
95     (of a DWARF section) is 0xffffffff (4 bytes) followed by eight
96     bytes indicating the actual length.  */
97  dwarf2_format_64bit,
98  /* SGI extension to DWARF2: The initial length is eight bytes.  */
99  dwarf2_format_64bit_irix
100};
101
102#endif /* AS_DWARF2DBG_H */
103