Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Validate an address and the relocatability of an offset from it. |
| 2 | Copyright (C) 2005 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 | int |
| 32 | dwfl_validate_address (Dwfl *dwfl, Dwarf_Addr address, Dwarf_Sword offset) |
| 33 | { |
| 34 | Dwfl_Module *mod = INTUSE(dwfl_addrmodule) (dwfl, address); |
| 35 | if (mod == NULL) |
| 36 | return -1; |
| 37 | |
| 38 | Dwarf_Addr relative = address; |
| 39 | int idx = INTUSE(dwfl_module_relocate_address) (mod, &relative); |
| 40 | if (idx < 0) |
| 41 | return -1; |
| 42 | |
| 43 | if (offset != 0) |
| 44 | { |
| 45 | int offset_idx = -1; |
| 46 | relative = address + offset; |
| 47 | if (relative >= mod->low_addr && relative <= mod->high_addr) |
| 48 | { |
| 49 | offset_idx = INTUSE(dwfl_module_relocate_address) (mod, &relative); |
| 50 | if (offset_idx < 0) |
| 51 | return -1; |
| 52 | } |
| 53 | if (offset_idx != idx) |
| 54 | { |
| 55 | __libdwfl_seterrno (DWFL_E_ADDR_OUTOFRANGE); |
| 56 | return -1; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | return 0; |
| 61 | } |