1 /*
2 * Copyright (c) 1994 Christos Zoulas
3 * Copyright (c) 1995 Frank van der Linden
4 * Copyright (c) 1995 Scott Bartram
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
30 * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
31 * $FreeBSD: src/sys/i386/linux/linux_util.h,v 1.3.4.1 1999/09/05 08:14:21 peter Exp $
32 */
33
34 /*
35 * This file is pretty much the same as Christos' svr4_util.h
36 * (for now).
37 */
38
39 #ifndef _LINUX_UTIL_H_
40 #define _LINUX_UTIL_H_
41
42 #include <vm/vm.h>
43 #include <vm/vm_param.h>
44 #include <vm/pmap.h>
45 #include <machine/vmparam.h>
46 #include <sys/exec.h>
47 #include <sys/sysent.h>
48 #include <sys/cdefs.h>
49
50 #ifndef SCARG
51 #define SCARG(p, x) (p)->x
52 #endif
53
54 static __inline caddr_t stackgap_init(void);
55 static __inline void *stackgap_alloc(caddr_t *, size_t);
56
57 static __inline caddr_t
58 stackgap_init()
59 {
60 #define szsigcode (*(curproc->p_sysent->sv_szsigcode))
61 return (caddr_t)(((caddr_t)PS_STRINGS) - szsigcode - SPARE_USRSPACE);
62 }
63
64
65 static __inline void *
66 stackgap_alloc(sgp, sz)
67 caddr_t *sgp;
68 size_t sz;
69 {
70 void *p = (void *) *sgp;
71 *sgp += ALIGN(sz);
72 return p;
73 }
74
75 #ifdef DEBUG_LINUX
76 #define DPRINTF(a) printf a;
77 #else
78 #define DPRINTF(a)
79 #endif
80
81 int linux_emul_find __P((struct proc *, caddr_t *, const char *, char *,
82 char **, int));
83
84 #define CHECKALTEXIST(p, sgp, path) \
85 linux_emul_find(p, sgp, linux_emul_path, path, &(path), 0)
86
87 #define CHECKALTCREAT(p, sgp, path) \
88 linux_emul_find(p, sgp, linux_emul_path, path, &(path), 1)
89
90 #endif /* !_LINUX_UTIL_H_ */
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