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