linux_util.h revision 14456 
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 * $Id: linux_util.h,v 1.1 1996/03/02 19:38:02 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
54static __inline caddr_t stackgap_init(void);
55static __inline void *stackgap_alloc(caddr_t *, size_t);
56
57static __inline caddr_t
58stackgap_init()
59{
60#define szsigcode (*(curproc->p_sysent->sv_szsigcode), sizeof(char *))
61	return (caddr_t)(((caddr_t)PS_STRINGS) - szsigcode - SPARE_USRSPACE);
62}
63
64
65static __inline void *
66stackgap_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
81int 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_ */
91