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 * The following structure is found at the top of the user stack of each 43 * user process. The ps program uses it to locate argv and environment 44 * strings. Programs that wish ps to display other information may modify 45 * it; normally ps_argvstr points to the argv vector, and ps_nargvstr 46 * is the same as the program's argc. The fields ps_envstr and ps_nenvstr 47 * are the equivalent for the environment. 48 */ 49 struct ps_strings { 50 char **ps_argvstr; /* first of 0 or more argument strings */ 51 unsigned int ps_nargvstr; /* the number of argument strings */ 52 char **ps_envstr; /* first of 0 or more environment strings */ 53 unsigned int ps_nenvstr; /* the number of environment strings */ 54 }; 55 56 /* 57 * Address of ps_strings structure (in user space). 58 */ 59 #define PS_STRINGS (USRSTACK - sizeof(struct ps_strings)) 60 #define SPARE_USRSPACE 4096 61 62 struct image_params; 63 64 struct execsw { 65 int (*ex_imgact)(struct image_params *); 66 const char *ex_name; 67 }; 68 69 #include <machine/exec.h> 70 71 #ifdef _KERNEL 72 #include <sys/cdefs.h> 73 74 int exec_map_first_page(struct image_params *); 75 void exec_unmap_first_page(struct image_params *); 76 77 int exec_register(const struct execsw *); 78 int exec_unregister(const struct execsw *); 79 80 /* 81 * note: name##_mod cannot be const storage because the 82 * linker_file_sysinit() function modifies _file in the 83 * moduledata_t. 84 */ 85 86 #include <sys/module.h> 87 88 #define EXEC_SET(name, execsw_arg) \ 89 static int __CONCAT(name,_modevent)(module_t mod, int type, \ 90 void *data) \ 91 { \ 92 struct execsw *exec = (struct execsw *)data; \ 93 int error = 0; \ 94 switch (type) { \ 95 case MOD_LOAD: \ 96 /* printf(#name " module loaded\n"); */ \ 97 error = exec_register(exec); \ 98 if (error) \ 99 printf(__XSTRING(name) "register failed\n"); \ 100 break; \ 101 case MOD_UNLOAD: \ 102 /* printf(#name " module unloaded\n"); */ \ 103 error = exec_unregister(exec); \ 104 if (error) \ 105 printf(__XSTRING(name) " unregister failed\n");\ 106 break; \ 107 default: \ 108 error = EOPNOTSUPP; \ 109 break; \ 110 } \ 111 return error; \ 112 } \ 113 static moduledata_t __CONCAT(name,_mod) = { \ 114 __XSTRING(name), \ 115 __CONCAT(name,_modevent), \ 116 (void *)& execsw_arg \ 117 }; \ 118 DECLARE_MODULE(name, __CONCAT(name,_mod), SI_SUB_EXEC, SI_ORDER_ANY) 119 #endif 120 121 #endif 122