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/* $OpenBSD: bsdos_exec.c,v 1.3 2000/06/08 22:25:24 niklas 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/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/exec.h>
#include <sys/resourcevar.h>
#include <vm/vm.h>
#if 0
#include <machine/bsdos_machdep.h>
#endif
#include <compat/bsdos/bsdos_exec.h>
#include <compat/bsdos/bsdos_syscall.h>
extern struct sysent bsdos_sysent[];
#ifdef SYSCALL_DEBUG
extern char *bsdos_syscallnames[];
#endif
extern char sigcode[], esigcode[];
struct emul emul_bsdos = {
"bsdos",
NULL,
sendsig,
BSDOS_SYS_syscall,
BSDOS_SYS_MAXSYSCALL,
bsdos_sysent,
#ifdef SYSCALL_DEBUG
bsdos_syscallnames,
#else
NULL,
#endif
0,
copyargs,
setregs,
NULL,
sigcode,
esigcode,
};
/*
* exec_aout_makecmds(): Check if it's an a.out-format executable.
*
* Given a proc 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_bsdos_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
u_long midmag, magic;
u_short mid;
int error = ENOEXEC;
struct exec *execp = epp->ep_hdr;
if (epp->ep_hdrvalid < sizeof(struct exec))
return ENOEXEC;
midmag = ntohl(execp->a_midmag);
mid = (midmag >> 16) & 0xffff;
magic = midmag & 0xffff;
if (magic == 0) {
magic = (execp->a_midmag & 0xffff);
mid = MID_BSDOS;
}
midmag = mid << 16 | magic;
switch (midmag) {
case (MID_BSDOS << 16) | ZMAGIC:
/*
* 386BSD's ZMAGIC format:
*/
error = exec_aout_prep_oldzmagic(p, epp);
break;
case (MID_BSDOS << 16) | QMAGIC:
/*
* BSDI's QMAGIC format:
* same as new ZMAGIC format, but with different magic number.
*/
error = exec_aout_prep_zmagic(p, epp);
break;
case (MID_BSDOS << 16) | NMAGIC:
/*
* BSDI's NMAGIC format:
* same as NMAGIC format, but with different magic number
* and with text starting at 0.
*/
error = exec_aout_prep_oldnmagic(p, epp);
break;
case (MID_BSDOS << 16) | OMAGIC:
/*
* BSDI's OMAGIC format:
* same as OMAGIC format, but with different magic number
* and with text starting at 0.
*/
error = exec_aout_prep_oldomagic(p, epp);
break;
}
if (error == 0)
epp->ep_emul = &emul_bsdos;
else
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
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