svr4_util.h revision 150335 
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 150335 2005-09-19 16:51:43Z rwatson $
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) do {							\
46	mtx_lock(&Giant);						\
47	uprintf a;							\
48} while (0)
49#else
50#define DPRINTF(a)
51#endif
52
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 (*(curthread->td_proc->p_sysent->sv_szsigcode))
61        return (caddr_t)(((caddr_t)PS_STRINGS) - szsigcode - SPARE_USRSPACE);
62}
63
64static __inline void *
65stackgap_alloc(sgp, sz)
66	caddr_t	*sgp;
67	size_t   sz;
68{
69	void	*p = (void *) *sgp;
70	sz = ALIGN(sz);
71	if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode))
72		return NULL;
73	*sgp += sz;
74	return p;
75}
76
77int	svr4_emul_find(struct thread *, char *, enum uio_seg, char **, int);
78
79#define CHECKALT(td, upath, pathp, i)					\
80	do {								\
81		int _error;						\
82									\
83		_error = svr4_emul_find(td, upath, UIO_USERSPACE, pathp, i); \
84		if (*(pathp) == NULL)					\
85			return (_error);				\
86	} while (0)
87
88#define CHECKALTEXIST(td, upath, pathp) CHECKALT(td, upath, pathp, 0)
89#define CHECKALTCREAT(td, upath, pathp) CHECKALT(td, upath, pathp, 1)
90
91#endif /* !_SVR4_UTIL_H_ */
92