diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/mmap64.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/mmap64.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/mmap64.c b/sysdeps/unix/sysv/linux/powerpc/mmap64.c new file mode 100644 index 0000000000..135ed99a36 --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/mmap64.c @@ -0,0 +1,76 @@ +/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>, 1999. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <unistd.h> + +#include <sysdep.h> +#include <sys/syscall.h> + +#include <sys/mman.h> + +#include <asm/page.h> + +#include "kernel-features.h" + +#ifdef __NR_mmap2 +extern int __syscall_mmap2(__ptr_t, size_t, int, int, int, off_t); +#ifndef __ASSUME_MMAP2_SYSCALL +static int have_no_mmap2; +#endif +#endif + +__ptr_t +__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset) +{ +#ifdef __NR_mmap2 + if ( +#ifndef __ASSUME_MMAP2_SYSCALL + ! have_no_mmap2 && +#endif + ! (offset & PAGE_MASK)) + { +#ifndef __ASSUME_MMAP2_SYSCALL + int saved_errno = errno; +#endif + /* This will be always 12, no matter what page size is. */ + int result = INLINE_SYSCALL (mmap2, 6, addr, len, prot, flags, + fd, (off_t) (offset >> PAGE_SHIFT)); + +#ifndef __ASSUME_MMAP2_SYSCALL + if (result != -1 || errno != ENOSYS) +#endif + return result; + +#ifndef __ASSUME_MMAP2_SYSCALL + __set_errno (saved_errno); + have_no_mmap2 = 1; +#endif + } +#endif + if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len)) + { + __set_errno (EINVAL); + return MAP_FAILED; + } + + return __mmap (addr, len, prot, flags, fd, (off_t) offset); +} + +weak_alias (__mmap64, mmap64) |