1 /* dwarf2dbg.h - DWARF2 debug support
2 Copyright (C) 1999-2019 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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 3, or (at your option)
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.
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
21 #ifndef AS_DWARF2DBG_H
22 #define AS_DWARF2DBG_H
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)
31 struct dwarf2_line_info
38 unsigned int discriminator;
42 /* Implements the .file FILENO "FILENAME" directive. FILENO can be 0
43 to indicate that no file number has been assigned. All real file
44 number must be >0. The second form returns the filename extracted
45 from the input stream. */
46 extern void dwarf2_directive_file (int);
47 extern char * dwarf2_directive_filename (void);
49 /* Implements the .loc FILENO LINENO [COLUMN] directive. FILENO is
50 the file number, LINENO the line number and the (optional) COLUMN
51 the column of the source code that the following instruction
52 corresponds to. FILENO can be 0 to indicate that the filename
53 specified by the textually most recent .file directive should be
55 extern void dwarf2_directive_loc (int);
57 /* Implements the .loc_mark_labels {0,1} directive. */
58 extern void dwarf2_directive_loc_mark_labels (int);
60 /* Returns the current source information. If .file directives have
61 been encountered, the info for the corresponding source file is
62 returned. Otherwise, the info for the assembly source file is
64 extern void dwarf2_where (struct dwarf2_line_info *);
66 /* A hook to allow the target backend to inform the line number state
67 machine of isa changes when assembler debug info is enabled. */
68 extern void dwarf2_set_isa (unsigned int);
70 /* This function generates .debug_line info based on the address and
71 source information passed in the arguments. ADDR should be the
72 frag-relative offset of the instruction the information is for and
73 L is the source information that should be associated with that
75 extern void dwarf2_gen_line_info (addressT, struct dwarf2_line_info *);
77 /* Must be called for each generated instruction. */
78 extern void dwarf2_emit_insn (int);
80 void dwarf2_move_insn (int);
82 /* Reset the state of the line number information to reflect that
84 extern void dwarf2_consume_line_info (void);
86 /* Should be called for each code label. */
87 extern void dwarf2_emit_label (symbolS *);
89 /* True when we've seen a .loc directive recently. Used to avoid
90 doing work when there's nothing to do. */
91 extern bfd_boolean dwarf2_loc_directive_seen;
93 /* True when we're supposed to set the basic block mark whenever a label
94 is seen. Unless the target is doing Something Weird, just call
96 extern bfd_boolean dwarf2_loc_mark_labels;
98 extern void dwarf2_init (void);
100 extern void dwarf2_finish (void);
102 extern int dwarf2dbg_estimate_size_before_relax (fragS *);
103 extern int dwarf2dbg_relax_frag (fragS *);
104 extern void dwarf2dbg_convert_frag (fragS *);
106 extern void dwarf2dbg_final_check (void);
108 /* An enumeration which describes the sizes of offsets (to DWARF sections)
109 and the mechanism by which the size is indicated. */
112 /* 32-bit format: the initial length field is 4 bytes long. */
114 /* DWARF3 64-bit format: the representation of the initial length
115 (of a DWARF section) is 0xffffffff (4 bytes) followed by eight
116 bytes indicating the actual length. */
118 /* SGI extension to DWARF2: The initial length is eight bytes. */
119 dwarf2_format_64bit_irix
122 #endif /* AS_DWARF2DBG_H */