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/i386/ibcs2/ibcs2_sysvec.c

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    1 /*
    2  * Copyright (c) 1995 Steven Wallace
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Steven Wallace.
   16  * 4. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD: stable/4/sys/i386/ibcs2/ibcs2_sysvec.c 72848 2001-02-22 05:15:12Z marcel $
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/sysent.h>
   37 #include <sys/signalvar.h>
   38 #include <sys/proc.h>
   39 
   40 #include <i386/ibcs2/ibcs2_syscall.h>
   41 #include <i386/ibcs2/ibcs2_signal.h>
   42 
   43 extern int bsd_to_ibcs2_errno[];
   44 extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
   45 extern int szsigcode;
   46 extern char sigcode[];
   47 
   48 struct sysentvec ibcs2_svr3_sysvec = {
   49         sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
   50         ibcs2_sysent,
   51         0xFF,
   52         IBCS2_SIGTBLSZ,
   53         bsd_to_ibcs2_sig,
   54         ELAST + 1,
   55         bsd_to_ibcs2_errno,
   56         0,              /* trap-to-signal translation function */
   57         0,              /* fixup */
   58         sendsig,
   59         sigcode,        /* use generic trampoline */
   60         &szsigcode,     /* use generic trampoline size */
   61         0,              /* prepsyscall */
   62         "IBCS2 COFF",
   63         NULL,           /* we don't have a COFF coredump function */
   64         NULL,
   65         IBCS2_MINSIGSTKSZ
   66 };
   67 
   68 /*
   69  * Create an "ibcs2" module that does nothing but allow checking for
   70  * the presence of the subsystem.
   71  */
   72 static int
   73 ibcs2_modevent(module_t mod, int type, void *unused)
   74 {
   75         struct proc *p = NULL;
   76 
   77         switch(type) {
   78         case MOD_UNLOAD:
   79                 /* if this was an ELF module we'd use elf_brand_inuse()... */
   80                 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
   81                         if (p->p_sysent == &ibcs2_svr3_sysvec)
   82                                 return EBUSY;
   83                 }
   84         default:
   85                 /* do not care */
   86         }
   87         return 0;
   88 }
   89 static moduledata_t ibcs2_mod = {
   90         "ibcs2",
   91         ibcs2_modevent,
   92         0
   93 };
   94 DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);

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