Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Report build ID information for a module. |
| 2 | Copyright (C) 2007, 2008 Red Hat, Inc. |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 3 | This file is part of elfutils. |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 4 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 5 | This file is free software; you can redistribute it and/or modify |
| 6 | it under the terms of either |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 7 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 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 |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 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 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 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/>. */ |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 28 | |
| 29 | #include "libdwflP.h" |
| 30 | |
| 31 | // XXX vs report changed module: punting old file |
| 32 | int |
| 33 | dwfl_module_report_build_id (Dwfl_Module *mod, |
| 34 | const unsigned char *bits, size_t len, |
| 35 | GElf_Addr vaddr) |
| 36 | { |
| 37 | if (mod == NULL) |
| 38 | return -1; |
| 39 | |
| 40 | if (mod->main.elf != NULL) |
| 41 | { |
| 42 | /* Once we know about a file, we won't take any lies about |
| 43 | its contents. The only permissible call is a no-op. */ |
| 44 | |
| 45 | if ((size_t) mod->build_id_len == len |
| 46 | && (mod->build_id_vaddr == vaddr || vaddr == 0) |
| 47 | && !memcmp (bits, mod->build_id_bits, len)) |
| 48 | return 0; |
| 49 | |
| 50 | __libdwfl_seterrno (DWFL_E_ALREADY_ELF); |
| 51 | return -1; |
| 52 | } |
| 53 | |
| 54 | if (vaddr != 0 && (vaddr < mod->low_addr || vaddr + len > mod->high_addr)) |
| 55 | { |
| 56 | __libdwfl_seterrno (DWFL_E_ADDR_OUTOFRANGE); |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | void *copy = NULL; |
| 61 | if (len > 0) |
| 62 | { |
| 63 | copy = malloc (len); |
| 64 | if (unlikely (copy == NULL)) |
| 65 | { |
| 66 | __libdwfl_seterrno (DWFL_E_NOMEM); |
| 67 | return -1; |
| 68 | } |
| 69 | memcpy (copy, bits, len); |
| 70 | } |
| 71 | |
| 72 | free (mod->build_id_bits); |
| 73 | |
| 74 | mod->build_id_bits = copy; |
| 75 | mod->build_id_len = len; |
| 76 | mod->build_id_vaddr = vaddr; |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | INTDEF (dwfl_module_report_build_id) |