FreeBSD/Linux Kernel Cross Reference
sys/compat/freebsd/freebsd_exec_aout.c

     /*      $NetBSD: freebsd_exec_aout.c,v 1.8 2007/12/08 18:35:58 dsl Exp $        */
     
     /*
      * Copyright (c) 1993, 1994 Christopher G. Demetriou
      * 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 Christopher G. Demetriou.
     * 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>
    __KERNEL_RCSID(0, "$NetBSD: freebsd_exec_aout.c,v 1.8 2007/12/08 18:35:58 dsl Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/proc.h>
    #include <sys/exec.h>
    
    #ifndef EXEC_AOUT
    #define EXEC_AOUT       /* to get a.out specific stuff */
    #endif
    
    #include <compat/freebsd/freebsd_exec.h>
    
    /*
    * exec_aout_makecmds(): Check if it's an a.out-format executable.
    *
    * Given a lwp pointer and an exec package pointer, see if the referent
    * of the epp is in a.out format.  First check 'standard' magic numbers for
    * this architecture.  If that fails, try a CPU-dependent hook.
     *
     * This function, in the former case, or the hook, in the latter, is
     * responsible for creating a set of vmcmds which can be used to build
     * the process's vm space and inserting them into the exec package.
     */
    
    int
    exec_freebsd_aout_makecmds(struct lwp *l, struct exec_package *epp)
    {
            u_long midmag;
            int error = ENOEXEC;
            struct exec *execp = epp->ep_hdr;
    
            if (epp->ep_hdrvalid < sizeof(struct exec))
                    return ENOEXEC;
    
            midmag = FREEBSD_N_GETMID(*execp) << 16 | FREEBSD_N_GETMAGIC(*execp);
    
            /* assume FreeBSD's MID_MACHINE and [ZQNO]MAGIC is same as NetBSD's */
            switch (midmag) {
            case (MID_MACHINE << 16) | ZMAGIC:
                    error = exec_aout_prep_oldzmagic(l, epp);
                    break;
            case (MID_MACHINE << 16) | QMAGIC:
                    error = exec_aout_prep_zmagic(l, epp);
                    break;
            case (MID_MACHINE << 16) | NMAGIC:
                    error = exec_aout_prep_nmagic(l, epp);
                    break;
            case (MID_MACHINE << 16) | OMAGIC:
                    error = exec_aout_prep_omagic(l, epp);
                    break;
            }
            if (error)
                    kill_vmcmds(&epp->ep_vmcmds);
    
            return error;
    }

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