1/* $NetBSD: linux_llseek.c,v 1.35 2021/09/23 06:56:27 ryo 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: linux_llseek.c,v 1.35 2021/09/23 06:56:27 ryo Exp $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/mount.h> 39#include <sys/conf.h> 40 41#include <sys/sched.h> 42#include <sys/syscallargs.h> 43 44#include <compat/linux/common/linux_types.h> 45#include <compat/linux/common/linux_signal.h> 46#include <compat/linux/common/linux_fcntl.h> 47#include <compat/linux/common/linux_util.h> 48 49#include <compat/linux/linux_syscallargs.h> 50 51/* Used on: arm, i386, m68k, mips, ppc, sparc */ 52/* Not used on: aarch64, alpha, sparc64 */ 53 54/* 55 * This appears to be part of a Linux attempt to switch to 64 bits file sizes. 56 */ 57int 58linux_sys_llseek(struct lwp *l, const struct linux_sys_llseek_args *uap, register_t *retval) 59{ 60 /* { 61 syscallarg(int) fd; 62 syscallarg(uint32_t) ohigh; 63 syscallarg(uint32_t) olow; 64 syscallarg(void *) res; 65 syscallarg(int) whence; 66 } */ 67 struct sys_lseek_args bla; 68 int error; 69 off_t off; 70 71 off = SCARG(uap, olow) | (((off_t) SCARG(uap, ohigh)) << 32); 72 73 SCARG(&bla, fd) = SCARG(uap, fd); 74 SCARG(&bla, offset) = off; 75 SCARG(&bla, whence) = SCARG(uap, whence); 76 77 if ((error = sys_lseek(l, &bla, retval))) 78 return error; 79 80 if ((error = copyout(retval, SCARG(uap, res), sizeof (off_t)))) 81 return error; 82 83 retval[0] = 0; 84 return 0; 85} 86