1 /* $NetBSD: mmap.c,v 1.12 2003/08/07 16:44:02 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)mmap.c 8.1 (Berkeley) 6/17/93"; 36 #else 37 __RCSID("$NetBSD: mmap.c,v 1.12 2003/08/07 16:44:02 agc Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <sys/types.h> 43 #include <sys/mman.h> 44 #include <sys/syscall.h> 45 #include <unistd.h> 46 47 #ifdef __weak_alias 48 __weak_alias(mmap,_mmap) 49 #endif 50 51 /* 52 * This function provides 64-bit offset padding that 53 * is not supplied by GCC 1.X but is supplied by GCC 2.X. 54 */ 55 void * 56 mmap(addr, len, prot, flags, fd, offset) 57 void *addr; 58 size_t len; 59 int prot; 60 int flags; 61 int fd; 62 off_t offset; 63 { 64 quad_t q; 65 caddr_t rv; 66 67 q = __syscall((quad_t)SYS_mmap, addr, len, prot, flags, fd, 0, offset); 68 if (/* LINTED constant */ sizeof (quad_t) == sizeof (register_t) || 69 /* LINTED constant */ BYTE_ORDER == LITTLE_ENDIAN) 70 rv = (caddr_t)(long)q; 71 else 72 rv = (caddr_t)(long)((u_quad_t)q >> 32); 73 return rv; 74 } 75