Florian Weimer | 4813dbb | 2014-04-24 14:06:43 +0200 | [diff] [blame] | 1 | /* Returns the file name and build ID stored in the .gnu_altdebuglink if found. |
| 2 | Copyright (C) 2014 Red Hat, Inc. |
| 3 | This file is part of elfutils. |
| 4 | |
| 5 | This file is free software; you can redistribute it and/or modify |
| 6 | it under the terms of either |
| 7 | |
| 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 |
| 11 | |
| 12 | or |
| 13 | |
| 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 |
| 17 | |
| 18 | or both in parallel, as here. |
| 19 | |
| 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. |
| 24 | |
| 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/>. */ |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | # include <config.h> |
| 31 | #endif |
| 32 | |
| 33 | #include "libdwelfP.h" |
| 34 | |
| 35 | ssize_t |
| 36 | dwelf_dwarf_gnu_debugaltlink (Dwarf *dwarf, |
| 37 | const char **name_p, |
| 38 | const void **build_idp) |
| 39 | { |
| 40 | Elf_Data *data = dwarf->sectiondata[IDX_gnu_debugaltlink]; |
| 41 | if (data == NULL) |
| 42 | { |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | const void *ptr = memchr (data->d_buf, '\0', data->d_size); |
| 47 | if (ptr == NULL) |
| 48 | { |
| 49 | __libdw_seterrno (DWARF_E_INVALID_ELF); |
| 50 | return -1; |
| 51 | } |
| 52 | size_t build_id_len = data->d_size - (ptr - data->d_buf + 1); |
| 53 | if (build_id_len == 0 || (size_t) (ssize_t) build_id_len != build_id_len) |
| 54 | { |
| 55 | __libdw_seterrno (DWARF_E_INVALID_ELF); |
| 56 | return -1; |
| 57 | } |
| 58 | *name_p = data->d_buf; |
| 59 | *build_idp = ptr + 1; |
| 60 | return build_id_len; |
| 61 | } |
| 62 | INTDEF(dwelf_dwarf_gnu_debugaltlink) |