diff options
Diffstat (limited to 'libc/sysdeps/linux/frv/_mmap.c')
-rw-r--r-- | libc/sysdeps/linux/frv/_mmap.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/frv/_mmap.c b/libc/sysdeps/linux/frv/_mmap.c new file mode 100644 index 000000000..b3fd7c3d8 --- /dev/null +++ b/libc/sysdeps/linux/frv/_mmap.c @@ -0,0 +1,48 @@ +/* Copyright (C) 1997, 1998, 1999, 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Daniel Jacobowitz <dan@debian.org>, 1999. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* Massivly hacked up for uClibc by Erik Andersen */ + +/* Extracted from ../common/mmap64.c by Alexandre Oliva <aoliva@redhat.com> + + We don't want to use the old mmap interface. */ + +#include <features.h> +#include <errno.h> +#include <unistd.h> +#include <sys/syscall.h> +#include <sys/mman.h> + +#define __NR___syscall_mmap2 __NR_mmap2 +static inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, + size_t, len, int, prot, int, flags, int, fd, off_t, offset); + +/* This is always 12, even on architectures where PAGE_SHIFT != 12. */ +# ifndef MMAP2_PAGE_SHIFT +# define MMAP2_PAGE_SHIFT 12 +# endif + +__ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offset) +{ + if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) { + __set_errno (EINVAL); + return MAP_FAILED; + } + return(__syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT))); +} |