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. 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: src/sys/sys/exec.h,v 1.26 1999/12/29 04:24:40 peter Exp $ 36 * $DragonFly: src/sys/sys/exec.h,v 1.5 2006/12/23 00:27:03 swildner Exp $ 37 */ 38 39 #ifndef _SYS_EXEC_H_ 40 #define _SYS_EXEC_H_ 41 42 /* 43 * The following structure is found at the top of the user stack of each 44 * user process. The ps program uses it to locate argv and environment 45 * strings. Programs that wish ps to display other information may modify 46 * it; normally ps_argvstr points to the argv vector, and ps_nargvstr 47 * is the same as the program's argc. The fields ps_envstr and ps_nenvstr 48 * are the equivalent for the environment. 49 */ 50 struct ps_strings { 51 char **ps_argvstr; /* first of 0 or more argument strings */ 52 int ps_nargvstr; /* the number of argument strings */ 53 char **ps_envstr; /* first of 0 or more environment strings */ 54 int ps_nenvstr; /* the number of environment strings */ 55 }; 56 57 /* 58 * Address of ps_strings structure (in user space). 59 */ 60 #define PS_STRINGS (USRSTACK - sizeof(struct ps_strings)) 61 #define SPARE_USRSPACE 256 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 struct lwbuf; 76 int exec_map_page(struct image_params *, vm_pindex_t, struct lwbuf **, 77 const char **); 78 void exec_unmap_page(struct lwbuf *); 79 int exec_map_first_page (struct image_params *); 80 void exec_unmap_first_page (struct image_params *); 81 82 int exec_register (const struct execsw *); 83 int exec_unregister (const struct execsw *); 84 85 /* 86 * note: name##_mod cannot be const storage because the 87 * linker_file_sysinit() function modifies _file in the 88 * moduledata_t. 89 */ 90 91 #include <sys/module.h> 92 93 #define DEFINE_EXEC_MODULE(name, execsw_arg) \ 94 static int name ## _modevent(module_t mod, int type, void *data) \ 95 { \ 96 struct execsw *exec = (struct execsw *)data; \ 97 int error = 0; \ 98 switch (type) { \ 99 case MOD_LOAD: \ 100 /* kprintf(#name " module loaded\n"); */ \ 101 error = exec_register(exec); \ 102 if (error) \ 103 kprintf(#name "register failed\n"); \ 104 break; \ 105 case MOD_UNLOAD: \ 106 /* kprintf(#name " module unloaded\n"); */ \ 107 error = exec_unregister(exec); \ 108 if (error) \ 109 kprintf(#name " unregister failed\n"); \ 110 break; \ 111 default: \ 112 break; \ 113 } \ 114 return error; \ 115 } \ 116 static moduledata_t name ## _mod = { \ 117 #name, \ 118 name ## _modevent, \ 119 (void *)& execsw_arg \ 120 }; 121 122 #define EXEC_SET_ORDERED(name, execsw_arg, order) \ 123 DEFINE_EXEC_MODULE(name, execsw_arg) \ 124 DECLARE_MODULE(name, name ## _mod, SI_SUB_EXEC, order) 125 126 #define EXEC_SET(name, execsw_arg) \ 127 EXEC_SET_ORDERED(name, execsw_arg, SI_ORDER_ANY) 128 129 #endif 130 131 #endif 132