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: releng/6.4/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
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 *, 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
101 int spx_open(struct thread *td);
102 #endif
103
104 #endif /* !_IBCS2_UTIL_H_ */
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