Commit | Line | Data |
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3054dd54 TT |
1 | /* DWARF abbrev table |
2 | ||
88b9d363 | 3 | Copyright (C) 1994-2022 Free Software Foundation, Inc. |
3054dd54 TT |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
10 | support. | |
11 | ||
12 | This file is part of GDB. | |
13 | ||
14 | This program is free software; you can redistribute it and/or modify | |
15 | it under the terms of the GNU General Public License as published by | |
16 | the Free Software Foundation; either version 3 of the License, or | |
17 | (at your option) any later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
26 | ||
27 | #ifndef GDB_DWARF2_ABBREV_H | |
28 | #define GDB_DWARF2_ABBREV_H | |
29 | ||
af0b2a3e TT |
30 | #include "hashtab.h" |
31 | ||
3054dd54 | 32 | struct attr_abbrev |
4444f407 TT |
33 | { |
34 | ENUM_BITFIELD(dwarf_attribute) name : 16; | |
35 | ENUM_BITFIELD(dwarf_form) form : 16; | |
3054dd54 | 36 | |
4444f407 TT |
37 | /* It is valid only if FORM is DW_FORM_implicit_const. */ |
38 | LONGEST implicit_const; | |
39 | }; | |
40 | ||
41 | /* This data structure holds the information of an abbrev. */ | |
42 | struct abbrev_info | |
43 | { | |
44 | /* Number identifying abbrev. */ | |
45 | unsigned int number; | |
46 | /* DWARF tag. */ | |
47 | enum dwarf_tag tag; | |
48 | /* True if the DIE has children. */ | |
49 | unsigned short has_children; | |
50 | /* Number of attributes. */ | |
51 | unsigned short num_attrs; | |
52 | /* An array of attribute descriptions, allocated using the struct | |
53 | hack. */ | |
54 | struct attr_abbrev attrs[1]; | |
55 | }; | |
3054dd54 | 56 | |
86de1d91 TT |
57 | struct abbrev_table; |
58 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; | |
59 | ||
3054dd54 TT |
60 | /* Top level data structure to contain an abbreviation table. */ |
61 | ||
62 | struct abbrev_table | |
63 | { | |
606decb2 TT |
64 | /* Read an abbrev table from the indicated section, at the given |
65 | offset. The caller is responsible for ensuring that the section | |
66 | has already been read. */ | |
67 | ||
68 | static abbrev_table_up read (struct dwarf2_section_info *section, | |
86de1d91 TT |
69 | sect_offset sect_off); |
70 | ||
71 | /* Look up an abbrev in the table. | |
72 | Returns NULL if the abbrev is not found. */ | |
73 | ||
7c32eebb | 74 | const struct abbrev_info *lookup_abbrev (unsigned int abbrev_number) const |
af0b2a3e TT |
75 | { |
76 | struct abbrev_info search; | |
77 | search.number = abbrev_number; | |
86de1d91 | 78 | |
af0b2a3e TT |
79 | return (struct abbrev_info *) htab_find_with_hash (m_abbrevs.get (), |
80 | &search, | |
81 | abbrev_number); | |
82 | } | |
86de1d91 TT |
83 | |
84 | /* Where the abbrev table came from. | |
85 | This is used as a sanity check when the table is used. */ | |
86 | const sect_offset sect_off; | |
87 | ||
88 | private: | |
89 | ||
1d33d811 | 90 | explicit abbrev_table (sect_offset off); |
3054dd54 TT |
91 | |
92 | DISABLE_COPY_AND_ASSIGN (abbrev_table); | |
93 | ||
3054dd54 | 94 | /* Add an abbreviation to the table. */ |
af0b2a3e | 95 | void add_abbrev (struct abbrev_info *abbrev); |
3054dd54 | 96 | |
1d33d811 TT |
97 | /* Hash table of abbrevs. */ |
98 | htab_up m_abbrevs; | |
3054dd54 | 99 | |
86de1d91 TT |
100 | /* Storage for the abbrev table. */ |
101 | auto_obstack m_abbrev_obstack; | |
102 | }; | |
3054dd54 TT |
103 | |
104 | #endif /* GDB_DWARF2_ABBREV_H */ |