xref: /netbsd-src/sys/compat/linux/common/linux_oldmmap.c (revision aaf4ece63a859a04e37cf3a7229b5fab0157cc06)
1 /*	$NetBSD: linux_oldmmap.c,v 1.64 2005/12/11 12:20:19 christos 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 1.64 2005/12/11 12:20:19 christos Exp $");
41 
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/mount.h>
45 
46 #include <sys/sa.h>
47 #include <sys/syscallargs.h>
48 
49 #include <uvm/uvm_param.h>
50 
51 #include <compat/linux/common/linux_types.h>
52 #include <compat/linux/common/linux_mmap.h>
53 #include <compat/linux/common/linux_oldmmap.h>
54 #include <compat/linux/common/linux_signal.h>
55 
56 #include <compat/linux/linux_syscallargs.h>
57 
58 /* Used on: arm, i386, m68k */
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  */
73 int
74 linux_sys_old_mmap(l, v, retval)
75 	struct lwp *l;
76 	void *v;
77 	register_t *retval;
78 {
79 	struct linux_sys_old_mmap_args /* {
80 		syscallarg(struct linux_oldmmap *) lmp;
81 	} */ *uap = v;
82 	struct linux_oldmmap lmap;
83 	struct linux_sys_mmap_args nlmap;
84 	int error;
85 
86 	if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
87 		return error;
88 
89 	if (lmap.lm_offset & PAGE_MASK)
90 		return EINVAL;
91 
92 	SCARG(&nlmap,addr) = lmap.lm_addr;
93 	SCARG(&nlmap,len) = lmap.lm_len;
94 	SCARG(&nlmap,prot) = lmap.lm_prot;
95 	SCARG(&nlmap,flags) = lmap.lm_flags;
96 	SCARG(&nlmap,fd) = lmap.lm_fd;
97 	SCARG(&nlmap,offset) = lmap.lm_offset;
98 	DPRINTF(("old_mmap(%#x, %u, %u, %u, %d, %u)\n",
99 	    lmap.lm_addr, lmap.lm_len, lmap.lm_prot, lmap.lm_flags,
100 	    lmap.lm_fd, lmap.lm_offset));
101 	return linux_sys_mmap(l, &nlmap, retval);
102 }
103 
104