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 * $FreeBSD$
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
43 #ifdef DEBUG_SVR4
44 #define DPRINTF(a) uprintf a;
45 #else
46 #define DPRINTF(a)
47 #endif
48
49
50 static __inline caddr_t stackgap_init(void);
51 static __inline void *stackgap_alloc(caddr_t *, size_t);
52
53 static __inline caddr_t
54 stackgap_init()
55 {
56 #define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
57 return (caddr_t)(((caddr_t)PS_STRINGS) - szsigcode - SPARE_USRSPACE);
58 }
59
60 static __inline void *
61 stackgap_alloc(sgp, sz)
62 caddr_t *sgp;
63 size_t sz;
64 {
65 void *p = (void *) *sgp;
66 sz = ALIGN(sz);
67 if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode))
68 return NULL;
69 *sgp += sz;
70 return p;
71 }
72
73 extern const char svr4_emul_path[];
74 int svr4_emul_find(struct thread *, caddr_t *, const char *, char *,
75 char **, int);
76
77 #define CHECKALT(p, sgp, path, i) \
78 do { \
79 int _error; \
80 \
81 _error = svr4_emul_find(p, sgp, svr4_emul_path, path, \
82 &path, i); \
83 if (_error == EFAULT) \
84 return (_error); \
85 } while (0)
86
87 #define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0)
88 #define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1)
89
90 #endif /* !_SVR4_UTIL_H_ */
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