diff options
Diffstat (limited to 'libc/sysdeps/linux/common/mmap64.c')
| -rw-r--r-- | libc/sysdeps/linux/common/mmap64.c | 87 |
1 files changed, 33 insertions, 54 deletions
diff --git a/libc/sysdeps/linux/common/mmap64.c b/libc/sysdeps/linux/common/mmap64.c index f0380b1ad..2cf200dc9 100644 --- a/libc/sysdeps/linux/common/mmap64.c +++ b/libc/sysdeps/linux/common/mmap64.c @@ -1,87 +1,66 @@ -/* Copyright (C) 1997, 1998, 1999, 2002 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. */ - +/* + * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> + * + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ /* Massivly hacked up for uClibc by Erik Andersen */ -#define mmap __mmap +#include <_lfs_64.h> + +#ifdef __UCLIBC_HAS_LFS__ -#include <features.h> #include <errno.h> #include <unistd.h> #include <sys/mman.h> +#include <sys/syscall.h> +#include <bits/uClibc_page.h> +libc_hidden_proto(mmap) -#if defined __UCLIBC_HAS_LFS__ +# if !defined __NR_mmap2 || !defined _syscall6 -#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS != 64 -#undef _FILE_OFFSET_BITS -#define _FILE_OFFSET_BITS 64 -#endif -#ifndef __USE_LARGEFILE64 -# define __USE_LARGEFILE64 1 -#endif -/* We absolutely do _NOT_ want interfaces silently - * * renamed under us or very bad things will happen... */ -#ifdef __USE_FILE_OFFSET64 -# undef __USE_FILE_OFFSET64 -#endif - - -#if ! defined __NR_mmap2 || ! defined _syscall6 - -/* +/* * This version is a stub that just chops off everything at the mmap 32 bit * mmap() address space... You will probably need to add in an arch specific * implementation to override this as there is not a generic way for me to * implement this particular syscall if your arch lacks _syscall6... * -*/ + */ __ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset) { - if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len)) { - __set_errno (EINVAL); + 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); + return mmap(addr, len, prot, flags, fd, (off_t) offset); } -#else +# else -#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); +# 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 +/* Some architectures always use 12 as page shift for mmap2() eventhough the + * real PAGE_SHIFT != 12. Other architectures use the same value as + * PAGE_SHIFT... + */ +# ifndef MMAP2_PAGE_SHIFT +# define MMAP2_PAGE_SHIFT 12 +# endif __ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset) { if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) { - __set_errno (EINVAL); + __set_errno(EINVAL); return MAP_FAILED; } - return(__syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT))); + + return __syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT)); } -#endif +# endif #endif /* __UCLIBC_HAS_LFS__ */ |