| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Map addresses from a file or anonymous memory. NaCl version. |
| 2 | Copyright (C) 2015-2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <sys/mman.h> |
| 21 | #include <nacl-interfaces.h> |
| 22 | |
| 23 | |
| 24 | /* Map addresses starting near ADDR and extending for LEN bytes. From |
| 25 | OFFSET into the file FD describes according to PROT and FLAGS. If ADDR |
| 26 | is nonzero, it is the desired mapping address. If the MAP_FIXED bit is |
| 27 | set in FLAGS, the mapping will be at ADDR exactly (which must be |
| 28 | page-aligned); otherwise the system chooses a convenient nearby address. |
| 29 | The return value is the actual mapping address chosen or MAP_FAILED |
| 30 | for errors (in which case `errno' is set). A successful `mmap' call |
| 31 | deallocates any previous mapping for the affected region. */ |
| 32 | |
| 33 | __ptr_t |
| 34 | __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset) |
| 35 | { |
| 36 | int error = __nacl_irt_memory.mmap (&addr, len, prot, flags, fd, offset); |
| 37 | if (error) |
| 38 | { |
| 39 | errno = error; |
| 40 | return MAP_FAILED; |
| 41 | } |
| 42 | return addr; |
| 43 | } |
| 44 | weak_alias (__mmap, mmap) |
| 45 | |
| 46 | |
| 47 | /* Since off64_t is the same as off_t, mmap64 is just an alias. */ |
| 48 | strong_alias (__mmap, __mmap64) |
| 49 | weak_alias (__mmap, mmap64) |