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 * $FreeBSD: releng/5.3/sys/compat/linux/linux_util.h 133745 2004-08-15 11:52:45Z tjr $
32 */
33
34 /*
35 * This file is pretty much the same as Christos' svr4_util.h
36 * (for now).
37 */
38
39 #ifndef _LINUX_UTIL_H_
40 #define _LINUX_UTIL_H_
41
42 #include <vm/vm.h>
43 #include <vm/vm_param.h>
44 #include <vm/pmap.h>
45 #include <machine/vmparam.h>
46 #include <sys/exec.h>
47 #include <sys/sysent.h>
48 #include <sys/syslog.h>
49 #include <sys/cdefs.h>
50 #include <sys/uio.h>
51
52 static __inline caddr_t stackgap_init(void);
53 static __inline void *stackgap_alloc(caddr_t *, size_t);
54
55 #define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
56 #define psstrings (curthread->td_proc->p_sysent->sv_psstrings)
57
58 static __inline caddr_t
59 stackgap_init()
60 {
61 return (caddr_t)(psstrings - szsigcode - SPARE_USRSPACE);
62 }
63
64 static __inline void *
65 stackgap_alloc(sgp, sz)
66 caddr_t *sgp;
67 size_t sz;
68 {
69 void *p = (void *) *sgp;
70
71 sz = ALIGN(sz);
72 if (*sgp + sz > (caddr_t)(psstrings - szsigcode))
73 return NULL;
74 *sgp += sz;
75 return p;
76 }
77
78 extern const char linux_emul_path[];
79
80 int linux_emul_convpath(struct thread *, char *, enum uio_seg, char **, int);
81 int linux_emul_find(struct thread *, caddr_t *, char *, char **, int);
82
83 #define CHECKALT(p, sgp, path, i) \
84 do { \
85 int _error; \
86 \
87 _error = linux_emul_find(p, sgp, path, &path, i); \
88 if (_error == EFAULT) \
89 return (_error); \
90 } while (0)
91
92 #define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0)
93 #define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1)
94
95 #define LCONVPATH(td, upath, pathp, i) \
96 do { \
97 int _error; \
98 \
99 _error = linux_emul_convpath(td, upath, UIO_USERSPACE, \
100 pathp, i); \
101 if (*(pathp) == NULL) \
102 return (_error); \
103 } while (0)
104
105 #define LCONVPATHEXIST(td, upath, pathp) LCONVPATH(td, upath, pathp, 0)
106 #define LCONVPATHCREAT(td, upath, pathp) LCONVPATH(td, upath, pathp, 1)
107 #define LFREEPATH(path) free(path, M_TEMP)
108
109 #define DUMMY(s) \
110 int \
111 linux_ ## s(struct thread *p, struct linux_ ## s ## _args *args) \
112 { \
113 return (unimplemented_syscall(p, #s)); \
114 } \
115 struct __hack
116
117 void linux_msg(const struct thread *td, const char *fmt, ...)
118 __printflike(2, 3);
119
120 static __inline int
121 unimplemented_syscall(struct thread *td, const char *syscallname)
122 {
123
124 linux_msg(td, "syscall %s not implemented", syscallname);
125 return (ENOSYS);
126 }
127
128 #endif /* !_LINUX_UTIL_H_ */
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