1 /* $NetBSD: linux_llseek.c,v 1.33 2008/06/18 12:24:17 tsutsui 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 1.33 2008/06/18 12:24:17 tsutsui 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/malloc.h> 40 #include <sys/conf.h> 41 42 #include <sys/sched.h> 43 #include <sys/syscallargs.h> 44 45 #include <compat/linux/common/linux_types.h> 46 #include <compat/linux/common/linux_signal.h> 47 #include <compat/linux/common/linux_fcntl.h> 48 #include <compat/linux/common/linux_util.h> 49 50 #include <compat/linux/linux_syscallargs.h> 51 52 /* Used on: arm, i386, m68k, mips, ppc, sparc */ 53 /* Not used on: alpha, sparc64 */ 54 55 /* 56 * This appears to be part of a Linux attempt to switch to 64 bits file sizes. 57 */ 58 int 59 linux_sys_llseek(struct lwp *l, const struct linux_sys_llseek_args *uap, register_t *retval) 60 { 61 /* { 62 syscallarg(int) fd; 63 syscallarg(uint32_t) ohigh; 64 syscallarg(uint32_t) olow; 65 syscallarg(void *) res; 66 syscallarg(int) whence; 67 } */ 68 struct sys_lseek_args bla; 69 int error; 70 off_t off; 71 72 off = SCARG(uap, olow) | (((off_t) SCARG(uap, ohigh)) << 32); 73 74 SCARG(&bla, fd) = SCARG(uap, fd); 75 SCARG(&bla, offset) = off; 76 SCARG(&bla, whence) = SCARG(uap, whence); 77 78 if ((error = sys_lseek(l, &bla, retval))) 79 return error; 80 81 if ((error = copyout(retval, SCARG(uap, res), sizeof (off_t)))) 82 return error; 83 84 retval[0] = 0; 85 return 0; 86 } 87