ibcs2_util.h revision 141488 
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 *
32 * $FreeBSD: head/sys/i386/ibcs2/ibcs2_util.h 141488 2005-02-07 22:02:18Z jhb $
33 */
34
35/*
36 * This file is pretty much the same as Christos' svr4_util.h
37 * (for now).
38 */
39
40#ifndef	_IBCS2_UTIL_H_
41#define	_IBCS2_UTIL_H_
42
43/*
44 * XXX the inlines have obnoxious prerequisites, only some of which are
45 * included here.
46 */
47#include <vm/vm.h>
48#include <vm/pmap.h>
49#include <machine/vmparam.h>
50#include <sys/exec.h>
51#include <sys/sysent.h>
52#include <sys/proc.h>
53#include <sys/uio.h>
54
55static __inline caddr_t stackgap_init(void);
56static __inline void *stackgap_alloc(caddr_t *, size_t);
57
58static __inline caddr_t
59stackgap_init()
60{
61#define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
62        return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE);
63}
64
65static __inline void *
66stackgap_alloc(sgp, sz)
67	caddr_t	*sgp;
68	size_t   sz;
69{
70	void	*p = (void *) *sgp;
71	sz = ALIGN(sz);
72	if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode))
73		return NULL;
74	*sgp += sz;
75	return p;
76}
77
78#ifdef DEBUG_IBCS2
79#define DPRINTF(a)      printf a;
80#else
81#define DPRINTF(a)
82#endif
83
84extern const char ibcs2_emul_path[];
85
86int	ibcs2_emul_find(struct thread *, char *, enum uio_seg, char **, int);
87
88#define	CHECKALT(td, upath, pathp, i)					\
89	do {								\
90		int _error;						\
91									\
92		_error = ibcs2_emul_find(td, upath, UIO_USERSPACE, pathp, i); \
93		if (*(pathp) == NULL)					\
94			return (_error);				\
95	} while (0)
96
97#define CHECKALTEXIST(td, upath, pathp) CHECKALT(td, upath, pathp, 0)
98#define CHECKALTCREAT(td, upath, pathp) CHECKALT(td, upath, pathp, 1)
99
100#ifdef SPX_HACK
101int	spx_open(struct thread *td);
102#endif
103
104#endif /* !_IBCS2_UTIL_H_ */
105