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: src/sys/sys/exec.h,v 1.26 1999/12/29 04:24:40 peter Exp $ 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) __P((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 __P((struct image_params *)); 79 void exec_unmap_first_page __P((struct image_params *)); 80 81 int exec_register __P((const struct execsw *)); 82 int exec_unregister __P((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 124