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: releng/5.2/sys/i386/ibcs2/ibcs2_util.h 121016 2003-10-12 04:25:26Z tjr $
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 static __inline caddr_t stackgap_init(void);
56 static __inline void *stackgap_alloc(caddr_t *, size_t);
57
58 static __inline caddr_t
59 stackgap_init()
60 {
61 #define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
62 return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE);
63 }
64
65 static __inline void *
66 stackgap_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
84 extern const char ibcs2_emul_path[];
85
86 int ibcs2_emul_find(struct thread *, caddr_t *, const char *, char *,
87 char **, int);
88
89 #define CHECKALTEXIST(p, sgp, path) \
90 ibcs2_emul_find(td, sgp, ibcs2_emul_path, path, &(path), 0)
91
92 #define CHECKALTCREAT(p, sgp, path) \
93 ibcs2_emul_find(td, sgp, ibcs2_emul_path, path, &(path), 1)
94
95 #ifdef SPX_HACK
96 int spx_open(struct thread *td, void *uap);
97 #endif
98
99 #endif /* !_IBCS2_UTIL_H_ */
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