FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_sysvec.c

     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (c) 1995 Steven Wallace
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Steven Wallace.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/12.0/sys/i386/ibcs2/ibcs2_sysvec.c 326260 2017-11-27 15:08:52Z pfg $");
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/exec.h>
    #include <sys/imgact.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/sysent.h>
    #include <sys/signalvar.h>
    #include <sys/proc.h>
    #include <sys/sx.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    #include <vm/vm_param.h>
    
    #include <i386/ibcs2/ibcs2_syscall.h>
    #include <i386/ibcs2/ibcs2_signal.h>
    
    MODULE_VERSION(ibcs2, 1);
    
    extern int bsd_to_ibcs2_errno[];
    extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
    static int ibcs2_fixup(register_t **, struct image_params *);
    
    struct sysentvec ibcs2_svr3_sysvec = {
            .sv_size        = nitems(ibcs2_sysent),
            .sv_table       = ibcs2_sysent,
            .sv_mask        = 0xff,
            .sv_sigsize     = IBCS2_SIGTBLSZ,
            .sv_sigtbl      = bsd_to_ibcs2_sig,
            .sv_errsize     = ELAST + 1,
            .sv_errtbl      = bsd_to_ibcs2_errno,
            .sv_transtrap   = NULL,
            .sv_fixup       = ibcs2_fixup,
            .sv_sendsig     = sendsig,
            .sv_sigcode     = sigcode,      /* use generic trampoline */
            .sv_szsigcode   = &szsigcode,
            .sv_prepsyscall = NULL,
            .sv_name        = "IBCS2 COFF",
            .sv_coredump    = NULL, /* we don't have a COFF coredump function */
            .sv_imgact_try  = NULL,
            .sv_minsigstksz = IBCS2_MINSIGSTKSZ,
            .sv_pagesize    = PAGE_SIZE,
            .sv_minuser     = VM_MIN_ADDRESS,
            .sv_maxuser     = VM_MAXUSER_ADDRESS,
            .sv_usrstack    = USRSTACK,
            .sv_psstrings   = PS_STRINGS,
            .sv_stackprot   = VM_PROT_ALL,
            .sv_copyout_strings = exec_copyout_strings,
            .sv_setregs     = exec_setregs,
            .sv_fixlimit    = NULL,
            .sv_maxssiz     = NULL,
            .sv_flags       = SV_ABI_UNDEF | SV_IA32 | SV_ILP32,
            .sv_set_syscall_retval = cpu_set_syscall_retval,
            .sv_fetch_syscall_args = cpu_fetch_syscall_args,
            .sv_syscallnames = NULL,
            .sv_schedtail   = NULL,
            .sv_thread_detach = NULL,
            .sv_trap        = NULL,
    };
    
    static int
    ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
   {
   
           return (suword(--(*stack_base), imgp->args->argc));
   }
   
   /*
    * Create an "ibcs2" module that does nothing but allow checking for
    * the presence of the subsystem.
    */
   static int
   ibcs2_modevent(module_t mod, int type, void *unused)
   {
           struct proc *p = NULL;
           int rval = 0;
   
           switch(type) {
           case MOD_LOAD:
                   break;
           case MOD_UNLOAD:
                   /* if this was an ELF module we'd use elf_brand_inuse()... */
                   sx_slock(&allproc_lock);
                   FOREACH_PROC_IN_SYSTEM(p) {
                           if (p->p_sysent == &ibcs2_svr3_sysvec) {
                                   rval = EBUSY;
                                   break;
                           }
                   }
                   sx_sunlock(&allproc_lock);
                   break;
           default:
                   rval = EOPNOTSUPP;
                   break;
           }
           return (rval);
   }
   static moduledata_t ibcs2_mod = {
           "ibcs2",
           ibcs2_modevent,
           0
   };
   DECLARE_MODULE_TIED(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);

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