ibcs2_util.h revision 92761 
1
2/*
3 * Copyright (c) 1994 Christos Zoulas
4 * Copyright (c) 1995 Frank van der Linden
5 * Copyright (c) 1995 Scott Bartram
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
31 * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
32 *
33 * $FreeBSD: head/sys/i386/ibcs2/ibcs2_util.h 92761 2002-03-20 05:48:58Z alfred $
34 */
35
36/*
37 * This file is pretty much the same as Christos' svr4_util.h
38 * (for now).
39 */
40
41#ifndef	_IBCS2_UTIL_H_
42#define	_IBCS2_UTIL_H_
43
44/*
45 * XXX the inlines have obnoxious prerequisites, only some of which are
46 * included here.
47 */
48#include <vm/vm.h>
49#include <vm/pmap.h>
50#include <machine/vmparam.h>
51#include <sys/exec.h>
52#include <sys/sysent.h>
53#include <sys/proc.h>
54
55#ifndef SCARG
56#define SCARG(p, x)  (p)->x
57#endif
58
59static __inline caddr_t stackgap_init(void);
60static __inline void *stackgap_alloc(caddr_t *, size_t);
61
62static __inline caddr_t
63stackgap_init()
64{
65#define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
66        return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE);
67}
68
69static __inline void *
70stackgap_alloc(sgp, sz)
71	caddr_t	*sgp;
72	size_t   sz;
73{
74	void	*p = (void *) *sgp;
75	*sgp += ALIGN(sz);
76	return p;
77}
78
79#ifdef DEBUG_IBCS2
80#define DPRINTF(a)      printf a;
81#else
82#define DPRINTF(a)
83#endif
84
85extern const char ibcs2_emul_path[];
86
87int ibcs2_emul_find(struct thread *, caddr_t *, const char *, char *,
88			char **, int);
89
90#define CHECKALTEXIST(p, sgp, path) \
91    ibcs2_emul_find(td, sgp, ibcs2_emul_path, path, &(path), 0)
92
93#define CHECKALTCREAT(p, sgp, path) \
94    ibcs2_emul_find(td, sgp, ibcs2_emul_path, path, &(path), 1)
95
96#ifdef SPX_HACK
97int spx_open(struct thread *td, void *uap);
98#endif
99
100#endif /* !_IBCS2_UTIL_H_ */
101