linux_oldmmap.c revision 1.69 
1/*	$NetBSD: linux_oldmmap.c,v 1.69 2008/04/28 20:23:43 martin 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_oldmmap.c,v 1.69 2008/04/28 20:23:43 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/mount.h>
38
39#include <sys/syscallargs.h>
40
41#include <uvm/uvm_param.h>
42
43#ifdef __amd64__
44#include <compat/netbsd32/netbsd32.h>
45
46#include <compat/linux32/common/linux32_types.h>
47#include <compat/linux32/common/linux32_machdep.h>
48#endif
49
50#include <compat/linux/common/linux_types.h>
51#include <compat/linux/common/linux_mmap.h>
52#include <compat/linux/common/linux_oldmmap.h>
53#include <compat/linux/common/linux_signal.h>
54
55#include <compat/linux/linux_syscallargs.h>
56
57/* Used on: arm, i386, m68k */
58/* Used for linux32 on: amd64 */
59/* Not used on: alpha, mips, pcc, sparc, sparc64 */
60
61#undef DPRINTF
62#ifdef DEBUG_LINUX
63#define DPRINTF(a)	uprintf a
64#else
65#define DPRINTF(a)
66#endif
67
68/*
69 * Linux wants to pass everything to a syscall in registers.
70 * However mmap() has 6 of them. Oops: out of register error.
71 * They just pass everything in a structure.
72 */
73int
74linux_sys_old_mmap(struct lwp *l, const struct linux_sys_old_mmap_args *uap, register_t *retval)
75{
76	/* {
77		syscallarg(struct linux_oldmmap *) lmp;
78	} */
79	struct linux_oldmmap lmap;
80	struct linux_sys_mmap_args nlmap;
81	int error;
82
83	if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
84		return error;
85
86	if (lmap.lm_offset & PAGE_MASK)
87		return EINVAL;
88
89	SCARG(&nlmap,addr) = lmap.lm_addr;
90	SCARG(&nlmap,len) = lmap.lm_len;
91	SCARG(&nlmap,prot) = lmap.lm_prot;
92	SCARG(&nlmap,flags) = lmap.lm_flags;
93	SCARG(&nlmap,fd) = lmap.lm_fd;
94	SCARG(&nlmap,offset) = lmap.lm_offset;
95	DPRINTF(("old_mmap(%#x, %u, %u, %u, %d, %u)\n",
96	    lmap.lm_addr, lmap.lm_len, lmap.lm_prot, lmap.lm_flags,
97	    lmap.lm_fd, lmap.lm_offset));
98	return linux_sys_mmap(l, &nlmap, retval);
99}
100
101