/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek , 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 #include #include #include #include #include #include #include "kernel-features.h" #ifdef __NR_mmap2 extern void *__unbounded __syscall_mmap2(void *__unbounded, 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. */ __ptr_t result; __ptrvalue (result) = INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), len, prot, flags, fd, (off_t) (offset >> PAGE_SHIFT)); #if __BOUNDED_POINTERS__ __ptrlow (result) = __ptrvalue (result); __ptrhigh (result) = __ptrvalue (result) + len; #endif #ifndef __ASSUME_MMAP2_SYSCALL if (result != (__ptr_t) -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)