1 /* Interfaces for libdwelf. DWARF ELF Low-level Functions.
2 Copyright (C) 2014, 2015 Red Hat, Inc.
3 This file is part of elfutils.
5 This file is free software; you can redistribute it and/or modify
6 it under the terms of either
8 * the GNU Lesser General Public License as published by the Free
9 Software Foundation; either version 3 of the License, or (at
10 your option) any later version
14 * the GNU General Public License as published by the Free
15 Software Foundation; either version 2 of the License, or (at
16 your option) any later version
18 or both in parallel, as here.
20 elfutils is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 General Public License for more details.
25 You should have received copies of the GNU General Public License and
26 the GNU Lesser General Public License along with this program. If
27 not, see <http://www.gnu.org/licenses/>. */
38 /* DWARF ELF Low-level Functions (dwelf).
39 Functions starting with dwelf_elf will take a (libelf) Elf object as
40 first argument and might set elf_errno on error. Functions starting
41 with dwelf_dwarf will take a (libdw) Dwarf object as first argument
42 and might set dwarf_errno on error. */
44 /* Returns the name and the CRC32 of the separate debug file from the
45 .gnu_debuglink section if found in the ELF. Return NULL if the ELF
46 file didn't have a .gnu_debuglink section, had malformed data in the
47 section or some other error occured. */
48 extern const char *dwelf_elf_gnu_debuglink (Elf *elf, GElf_Word *crc);
50 /* Returns the name and build ID from the .gnu_debugaltlink section if
51 found in the ELF. On success, pointers to the name and build ID
52 are written to *NAMEP and *BUILDID_P, and the positive length of
53 the build ID is returned. Returns 0 if the ELF lacks a
54 .gnu_debugaltlink section. Returns -1 in case of malformed data or
56 extern ssize_t dwelf_dwarf_gnu_debugaltlink (Dwarf *dwarf,
58 const void **build_idp);
60 /* Returns the build ID as found in a NT_GNU_BUILD_ID note from either
61 a SHT_NOTE section or from a PT_NOTE segment if the ELF file
62 doesn't contain any section headers. On success a pointer to the
63 build ID is written to *BUILDID_P, and the positive length of the
64 build ID is returned. Returns 0 if the ELF lacks a NT_GNU_BUILD_ID
65 note. Returns -1 in case of malformed data or other errors. */
66 extern ssize_t dwelf_elf_gnu_build_id (Elf *elf, const void **build_idp);
68 /* Returns the size of the uncompressed data of a GNU compressed
69 section. The section name should start with .zdebug (but this
70 isn't checked by this function). If the section isn't compressed
71 (the section data doesn't start with ZLIB) -1 is returned. If an
72 error occured -1 is returned and elf_errno is set. */
73 extern ssize_t dwelf_scn_gnu_compressed_size (Elf_Scn *scn);
79 #endif /* libdwelf.h */