FreeBSD/Linux Kernel Cross Reference
sys/sys/exec.h
1 /*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)exec.h 8.3 (Berkeley) 1/21/94
39 * $FreeBSD: releng/5.0/sys/sys/exec.h 92719 2002-03-19 20:18:42Z alfred $
40 */
41
42 #ifndef _SYS_EXEC_H_
43 #define _SYS_EXEC_H_
44
45 /*
46 * The following structure is found at the top of the user stack of each
47 * user process. The ps program uses it to locate argv and environment
48 * strings. Programs that wish ps to display other information may modify
49 * it; normally ps_argvstr points to the argv vector, and ps_nargvstr
50 * is the same as the program's argc. The fields ps_envstr and ps_nenvstr
51 * are the equivalent for the environment.
52 */
53 struct ps_strings {
54 char **ps_argvstr; /* first of 0 or more argument strings */
55 int ps_nargvstr; /* the number of argument strings */
56 char **ps_envstr; /* first of 0 or more environment strings */
57 int ps_nenvstr; /* the number of environment strings */
58 };
59
60 /*
61 * Address of ps_strings structure (in user space).
62 */
63 #define PS_STRINGS (USRSTACK - sizeof(struct ps_strings))
64 #define SPARE_USRSPACE 256
65
66 struct image_params;
67
68 struct execsw {
69 int (*ex_imgact)(struct image_params *);
70 const char *ex_name;
71 };
72
73 #include <machine/exec.h>
74
75 #ifdef _KERNEL
76 #include <sys/cdefs.h>
77
78 int exec_map_first_page(struct image_params *);
79 void exec_unmap_first_page(struct image_params *);
80
81 int exec_register(const struct execsw *);
82 int exec_unregister(const struct execsw *);
83
84 /*
85 * note: name##_mod cannot be const storage because the
86 * linker_file_sysinit() function modifies _file in the
87 * moduledata_t.
88 */
89
90 #include <sys/module.h>
91
92 #define EXEC_SET(name, execsw_arg) \
93 static int name ## _modevent(module_t mod, int type, void *data) \
94 { \
95 struct execsw *exec = (struct execsw *)data; \
96 int error = 0; \
97 switch (type) { \
98 case MOD_LOAD: \
99 /* printf(#name " module loaded\n"); */ \
100 error = exec_register(exec); \
101 if (error) \
102 printf(#name "register failed\n"); \
103 break; \
104 case MOD_UNLOAD: \
105 /* printf(#name " module unloaded\n"); */ \
106 error = exec_unregister(exec); \
107 if (error) \
108 printf(#name " unregister failed\n"); \
109 break; \
110 default: \
111 break; \
112 } \
113 return error; \
114 } \
115 static moduledata_t name ## _mod = { \
116 #name, \
117 name ## _modevent, \
118 (void *)& execsw_arg \
119 }; \
120 DECLARE_MODULE(name, name ## _mod, SI_SUB_EXEC, SI_ORDER_ANY)
121 #endif
122
123 #endif
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