1 /* $NetBSD: linux_llseek.c,v 1.30 2007/12/08 18:36:08 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: linux_llseek.c,v 1.30 2007/12/08 18:36:08 dsl Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/mount.h> 46 #include <sys/malloc.h> 47 #include <sys/conf.h> 48 49 #include <sys/syscallargs.h> 50 51 #include <compat/linux/common/linux_types.h> 52 #include <compat/linux/common/linux_signal.h> 53 #include <compat/linux/common/linux_fcntl.h> 54 #include <compat/linux/common/linux_util.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 58 /* Used on: arm, i386, m68k, mips, ppc, sparc */ 59 /* Not used on: alpha, sparc64 */ 60 61 /* 62 * This appears to be part of a Linux attempt to switch to 64 bits file sizes. 63 */ 64 int 65 linux_sys_llseek(struct lwp *l, void *v, register_t *retval) 66 { 67 struct linux_sys_llseek_args /* { 68 syscallarg(int) fd; 69 syscallarg(uint32_t) ohigh; 70 syscallarg(uint32_t) olow; 71 syscallarg(void *) res; 72 syscallarg(int) whence; 73 } */ *uap = v; 74 struct sys_lseek_args bla; 75 int error; 76 off_t off; 77 78 off = SCARG(uap, olow) | (((off_t) SCARG(uap, ohigh)) << 32); 79 80 SCARG(&bla, fd) = SCARG(uap, fd); 81 SCARG(&bla, offset) = off; 82 SCARG(&bla, whence) = SCARG(uap, whence); 83 84 if ((error = sys_lseek(l, &bla, retval))) 85 return error; 86 87 if ((error = copyout(retval, SCARG(uap, res), sizeof (off_t)))) 88 return error; 89 90 retval[0] = 0; 91 return 0; 92 } 93