svr4_util.h revision 139743 
1/*-
2 * Copyright (c) 1998 Mark Newton
3 * Copyright (c) 1994 Christos Zoulas
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: head/sys/compat/svr4/svr4_util.h 139743 2005-01-05 22:34:37Z imp $
29 */
30
31#ifndef	_SVR4_UTIL_H_
32#define	_SVR4_UTIL_H_
33
34/*#include <compat/common/compat_util.h>*/
35#include <vm/vm.h>
36#include <vm/vm_param.h>
37#include <vm/pmap.h>
38#include <machine/vmparam.h>
39#include <sys/exec.h>
40#include <sys/sysent.h>
41#include <sys/cdefs.h>
42
43#ifdef DEBUG_SVR4
44#define DPRINTF(a)	uprintf a;
45#else
46#define DPRINTF(a)
47#endif
48
49
50static __inline caddr_t stackgap_init(void);
51static __inline void *stackgap_alloc(caddr_t *, size_t);
52
53static __inline caddr_t
54stackgap_init()
55{
56#define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
57        return (caddr_t)(((caddr_t)PS_STRINGS) - szsigcode - SPARE_USRSPACE);
58}
59
60static __inline void *
61stackgap_alloc(sgp, sz)
62	caddr_t	*sgp;
63	size_t   sz;
64{
65	void	*p = (void *) *sgp;
66	sz = ALIGN(sz);
67	if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode))
68		return NULL;
69	*sgp += sz;
70	return p;
71}
72
73extern const char svr4_emul_path[];
74int svr4_emul_find(struct thread *, caddr_t *, const char *, char *,
75			char **, int);
76
77#define CHECKALT(p, sgp, path, i)					\
78	do {								\
79		int _error;						\
80									\
81		_error = svr4_emul_find(p, sgp, svr4_emul_path, path,	\
82                    &path, i);						\
83		if (_error == EFAULT)					\
84			return (_error);				\
85	} while (0)
86
87#define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0)
88#define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1)
89
90#endif /* !_SVR4_UTIL_H_ */
91