The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/exec.h

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    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: releng/5.0/sys/sys/exec.h 92719 2002-03-19 20:18:42Z alfred $
   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)(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(struct image_params *);        
   79 void exec_unmap_first_page(struct image_params *);       
   80 
   81 int exec_register(const struct execsw *);
   82 int exec_unregister(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

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