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 * $FreeBSD$ 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 134