diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mmap64.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mmap64.c | 68 |
1 files changed, 17 insertions, 51 deletions
diff --git a/sysdeps/unix/sysv/linux/mmap64.c b/sysdeps/unix/sysv/linux/mmap64.c index 495d77768e..bca15f9c5d 100644 --- a/sysdeps/unix/sysv/linux/mmap64.c +++ b/sysdeps/unix/sysv/linux/mmap64.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999,2000,2001,2002,2006,2010 Free Software Foundation, Inc. +/* Copyright (C) 1999-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 1999. @@ -26,76 +26,42 @@ #include <kernel-features.h> -#ifdef __NR_mmap2 - /* This is always 12, even on architectures where PAGE_SHIFT != 12. */ -# if MMAP2_PAGE_SHIFT == -1 +#if MMAP2_PAGE_SHIFT == -1 static int page_shift; -# else -# ifndef MMAP2_PAGE_SHIFT -# define MMAP2_PAGE_SHIFT 12 -# endif -# define page_shift MMAP2_PAGE_SHIFT -# endif - -# ifndef __ASSUME_MMAP2_SYSCALL -static int have_no_mmap2; +#else +# ifndef MMAP2_PAGE_SHIFT +# define MMAP2_PAGE_SHIFT 12 # endif +#define page_shift MMAP2_PAGE_SHIFT #endif void * __mmap64 (void *addr, size_t len, int prot, int flags, int fd, off64_t offset) { -#ifdef __NR_mmap2 -# if MMAP2_PAGE_SHIFT == -1 +#if MMAP2_PAGE_SHIFT == -1 if (page_shift == 0) { int page_size = getpagesize (); while ((1 << ++page_shift) != page_size) ; } -# endif - if (offset & ((1 << page_shift) - 1)) - { - __set_errno (EINVAL); - return MAP_FAILED; - } -# ifndef __ASSUME_MMAP2_SYSCALL - if (! have_no_mmap2) -# endif - { -# ifndef __ASSUME_MMAP2_SYSCALL - int saved_errno = errno; -# endif - void *result; - __ptrvalue (result) = (void *__unbounded) - INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), - len, prot, flags, fd, - (off_t) (offset >> MMAP2_PAGE_SHIFT)); -# if __BOUNDED_POINTERS__ - __ptrlow (result) = __ptrvalue (result); - __ptrhigh (result) = __ptrvalue (result) + len; -# endif -# ifndef __ASSUME_MMAP2_SYSCALL - if (result != MAP_FAILED || errno != ENOSYS) -# endif - return result; - -# ifndef __ASSUME_MMAP2_SYSCALL - __set_errno (saved_errno); - have_no_mmap2 = 1; -# endif - } #endif -#ifndef __ASSUME_MMAP2_SYSCALL - if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len)) + if (offset & ((1 << page_shift) - 1)) { __set_errno (EINVAL); return MAP_FAILED; } - - return __mmap (addr, len, prot, flags, fd, (off_t) offset); + void *result; + __ptrvalue (result) = (void *__unbounded) + INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), + len, prot, flags, fd, + (off_t) (offset >> MMAP2_PAGE_SHIFT)); +#if __BOUNDED_POINTERS__ + __ptrlow (result) = __ptrvalue (result); + __ptrhigh (result) = __ptrvalue (result) + len; #endif + return result; } weak_alias (__mmap64, mmap64) |