FreeBSD/Linux Kernel Cross Reference
sys/sys/exec.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)exec.h 8.3 (Berkeley) 1/21/94
37 * $FreeBSD: releng/12.0/sys/sys/exec.h 326023 2017-11-20 19:43:44Z pfg $
38 */
39
40 #ifndef _SYS_EXEC_H_
41 #define _SYS_EXEC_H_
42
43 /*
44 * Before ps_args existed, the following structure, found at the top of
45 * the user stack of each user process, was used by ps(1) to locate
46 * environment and argv strings. Normally ps_argvstr points to the
47 * argv vector, and ps_nargvstr is the same as the program's argc. The
48 * fields ps_envstr and ps_nenvstr are the equivalent for the environment.
49 *
50 * Programs should now use setproctitle(3) to change ps output.
51 * setproctitle() always informs the kernel with sysctl and sets the
52 * pointers in ps_strings. The kern.proc.args sysctl first tries p_args.
53 * If p_args is NULL, it then falls back to reading ps_strings and following
54 * the pointers.
55 */
56 struct ps_strings {
57 char **ps_argvstr; /* first of 0 or more argument strings */
58 unsigned int ps_nargvstr; /* the number of argument strings */
59 char **ps_envstr; /* first of 0 or more environment strings */
60 unsigned int ps_nenvstr; /* the number of environment strings */
61 };
62
63 struct image_params;
64
65 struct execsw {
66 int (*ex_imgact)(struct image_params *);
67 const char *ex_name;
68 };
69
70 #include <machine/exec.h>
71
72 #ifdef _KERNEL
73 #include <sys/cdefs.h>
74
75 /*
76 * Address of ps_strings structure (in user space).
77 * Prefer the kern.ps_strings or kern.proc.ps_strings sysctls to this constant.
78 */
79 #define PS_STRINGS (USRSTACK - sizeof(struct ps_strings))
80 #define SPARE_USRSPACE 4096
81
82 int exec_map_first_page(struct image_params *);
83 void exec_unmap_first_page(struct image_params *);
84
85 int exec_register(const struct execsw *);
86 int exec_unregister(const struct execsw *);
87
88 extern int coredump_pack_fileinfo;
89 extern int coredump_pack_vmmapinfo;
90
91 /*
92 * note: name##_mod cannot be const storage because the
93 * linker_file_sysinit() function modifies _file in the
94 * moduledata_t.
95 */
96
97 #include <sys/module.h>
98
99 #define EXEC_SET(name, execsw_arg) \
100 static int __CONCAT(name,_modevent)(module_t mod, int type, \
101 void *data) \
102 { \
103 struct execsw *exec = (struct execsw *)data; \
104 int error = 0; \
105 switch (type) { \
106 case MOD_LOAD: \
107 /* printf(#name " module loaded\n"); */ \
108 error = exec_register(exec); \
109 if (error) \
110 printf(__XSTRING(name) "register failed\n"); \
111 break; \
112 case MOD_UNLOAD: \
113 /* printf(#name " module unloaded\n"); */ \
114 error = exec_unregister(exec); \
115 if (error) \
116 printf(__XSTRING(name) " unregister failed\n");\
117 break; \
118 default: \
119 error = EOPNOTSUPP; \
120 break; \
121 } \
122 return error; \
123 } \
124 static moduledata_t __CONCAT(name,_mod) = { \
125 __XSTRING(name), \
126 __CONCAT(name,_modevent), \
127 (void *)& execsw_arg \
128 }; \
129 DECLARE_MODULE_TIED(name, __CONCAT(name,_mod), SI_SUB_EXEC, \
130 SI_ORDER_ANY)
131 #endif
132
133 #endif
Cache object: 1f2af52b77911ef6e74c5c1e905c0d65
|