| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1997, 1998, 1999, 2002, 2003 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Daniel Jacobowitz <dan@debian.org>, 1999. |
| 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, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | /* Massivly hacked up for uClibc by Erik Andersen */ |
| 21 | |
| 22 | /* Extracted from ../common/mmap64.c by Alexandre Oliva <aoliva@redhat.com> |
| 23 | |
| 24 | We don't want to use the old mmap interface. */ |
| 25 | |
| 26 | #include <features.h> |
| 27 | #include <errno.h> |
| 28 | #include <unistd.h> |
| 29 | #include <sys/syscall.h> |
| 30 | #include <sys/mman.h> |
| 31 | |
| 32 | |
| 33 | #define __NR___syscall_mmap2 __NR_mmap2 |
| 34 | static __inline__ _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, |
| 35 | size_t, len, int, prot, int, flags, int, fd, off_t, offset) |
| 36 | |
| 37 | /* This is always 12, even on architectures where PAGE_SHIFT != 12. */ |
| 38 | # ifndef MMAP2_PAGE_SHIFT |
| 39 | # define MMAP2_PAGE_SHIFT 12 |
| 40 | # endif |
| 41 | |
| 42 | __ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offset) |
| 43 | { |
| 44 | if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) { |
| 45 | __set_errno (EINVAL); |
| 46 | return MAP_FAILED; |
| 47 | } |
| 48 | return(__syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT))); |
| 49 | } |
| 50 | libc_hidden_def(mmap) |