svr4_util.h revision 141486 
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 141486 2005-02-07 21:53:42Z jhb $
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#include <sys/uio.h>
43
44#ifdef DEBUG_SVR4
45#define DPRINTF(a)	uprintf a;
46#else
47#define DPRINTF(a)
48#endif
49
50
51static __inline caddr_t stackgap_init(void);
52static __inline void *stackgap_alloc(caddr_t *, size_t);
53
54static __inline caddr_t
55stackgap_init()
56{
57#define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
58        return (caddr_t)(((caddr_t)PS_STRINGS) - szsigcode - SPARE_USRSPACE);
59}
60
61static __inline void *
62stackgap_alloc(sgp, sz)
63	caddr_t	*sgp;
64	size_t   sz;
65{
66	void	*p = (void *) *sgp;
67	sz = ALIGN(sz);
68	if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode))
69		return NULL;
70	*sgp += sz;
71	return p;
72}
73
74int	svr4_emul_find(struct thread *, char *, enum uio_seg, char **, int);
75
76#define CHECKALT(td, upath, pathp, i)					\
77	do {								\
78		int _error;						\
79									\
80		_error = svr4_emul_find(td, upath, UIO_USERSPACE, pathp, i); \
81		if (*(pathp) == NULL)					\
82			return (_error);				\
83	} while (0)
84
85#define CHECKALTEXIST(td, upath, pathp) CHECKALT(td, upath, pathp, 0)
86#define CHECKALTCREAT(td, upath, pathp) CHECKALT(td, upath, pathp, 1)
87
88#endif /* !_SVR4_UTIL_H_ */
89