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f4382c45 TT |
1 | /* Low-level DWARF 2 reading code |
2 | ||
3 | Copyright (C) 1994-2020 Free Software Foundation, Inc. | |
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_LEB_H | |
28 | #define GDB_DWARF2_LEB_H | |
29 | ||
30 | /* Read dwarf information from a buffer. */ | |
31 | ||
32 | static inline unsigned int | |
33 | read_1_byte (bfd *abfd, const gdb_byte *buf) | |
34 | { | |
35 | return bfd_get_8 (abfd, buf); | |
36 | } | |
37 | ||
38 | static inline int | |
39 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) | |
40 | { | |
41 | return bfd_get_signed_8 (abfd, buf); | |
42 | } | |
43 | ||
44 | static inline unsigned int | |
45 | read_2_bytes (bfd *abfd, const gdb_byte *buf) | |
46 | { | |
47 | return bfd_get_16 (abfd, buf); | |
48 | } | |
49 | ||
50 | static inline int | |
51 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) | |
52 | { | |
53 | return bfd_get_signed_16 (abfd, buf); | |
54 | } | |
55 | ||
56 | /* Read the next three bytes (little-endian order) as an unsigned integer. */ | |
57 | static inline unsigned int | |
58 | read_3_bytes (bfd *abfd, const gdb_byte *buf) | |
59 | { | |
60 | unsigned int result = 0; | |
61 | for (int i = 0; i < 3; ++i) | |
62 | { | |
63 | unsigned char byte = bfd_get_8 (abfd, buf); | |
64 | buf++; | |
65 | result |= ((unsigned int) byte << (i * 8)); | |
66 | } | |
67 | return result; | |
68 | } | |
69 | ||
70 | static inline unsigned int | |
71 | read_4_bytes (bfd *abfd, const gdb_byte *buf) | |
72 | { | |
73 | return bfd_get_32 (abfd, buf); | |
74 | } | |
75 | ||
76 | static inline int | |
77 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) | |
78 | { | |
79 | return bfd_get_signed_32 (abfd, buf); | |
80 | } | |
81 | ||
82 | static inline ULONGEST | |
83 | read_8_bytes (bfd *abfd, const gdb_byte *buf) | |
84 | { | |
85 | return bfd_get_64 (abfd, buf); | |
86 | } | |
87 | ||
88 | extern LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); | |
89 | ||
90 | extern ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); | |
91 | ||
92 | #endif /* GDB_DWARF2_LEB_H */ |