linux_oldmmap.c revision 1.68 
1/*	$NetBSD: linux_oldmmap.c,v 1.68 2007/12/20 23:02:55 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_oldmmap.c,v 1.68 2007/12/20 23:02:55 dsl Exp $");
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/mount.h>
45
46#include <sys/syscallargs.h>
47
48#include <uvm/uvm_param.h>
49
50#ifdef __amd64__
51#include <compat/netbsd32/netbsd32.h>
52
53#include <compat/linux32/common/linux32_types.h>
54#include <compat/linux32/common/linux32_machdep.h>
55#endif
56
57#include <compat/linux/common/linux_types.h>
58#include <compat/linux/common/linux_mmap.h>
59#include <compat/linux/common/linux_oldmmap.h>
60#include <compat/linux/common/linux_signal.h>
61
62#include <compat/linux/linux_syscallargs.h>
63
64/* Used on: arm, i386, m68k */
65/* Used for linux32 on: amd64 */
66/* Not used on: alpha, mips, pcc, sparc, sparc64 */
67
68#undef DPRINTF
69#ifdef DEBUG_LINUX
70#define DPRINTF(a)	uprintf a
71#else
72#define DPRINTF(a)
73#endif
74
75/*
76 * Linux wants to pass everything to a syscall in registers.
77 * However mmap() has 6 of them. Oops: out of register error.
78 * They just pass everything in a structure.
79 */
80int
81linux_sys_old_mmap(struct lwp *l, const struct linux_sys_old_mmap_args *uap, register_t *retval)
82{
83	/* {
84		syscallarg(struct linux_oldmmap *) lmp;
85	} */
86	struct linux_oldmmap lmap;
87	struct linux_sys_mmap_args nlmap;
88	int error;
89
90	if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
91		return error;
92
93	if (lmap.lm_offset & PAGE_MASK)
94		return EINVAL;
95
96	SCARG(&nlmap,addr) = lmap.lm_addr;
97	SCARG(&nlmap,len) = lmap.lm_len;
98	SCARG(&nlmap,prot) = lmap.lm_prot;
99	SCARG(&nlmap,flags) = lmap.lm_flags;
100	SCARG(&nlmap,fd) = lmap.lm_fd;
101	SCARG(&nlmap,offset) = lmap.lm_offset;
102	DPRINTF(("old_mmap(%#x, %u, %u, %u, %d, %u)\n",
103	    lmap.lm_addr, lmap.lm_len, lmap.lm_prot, lmap.lm_flags,
104	    lmap.lm_fd, lmap.lm_offset));
105	return linux_sys_mmap(l, &nlmap, retval);
106}
107
108