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/* $OpenBSD: vax1k_exec.c,v 1.2 2002/03/14 01:26:51 millert Exp $ */
/* $NetBSD: vax1k_exec.c,v 1.1 1998/08/21 13:25:47 ragge 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.
*/
/*
* Exec glue to provide compatibility with older NetBSD vax1k exectuables.
*
* Because NetBSD/vax now uses 4k page size, older binaries (that started
* on an 1k boundary) cannot be mmap'ed. Therefore they are read in
* (via vn_rdwr) as OMAGIC binaries and executed. This will use a little
* bit more memory, but otherwise won't affect the execution speed.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/exec.h>
#include <sys/resourcevar.h>
#include <compat/vax1k/vax1k_exec.h>
int exec_vax1k_prep_anymagic(struct proc *, struct exec_package *, int);
/*
* exec_vax1k_makecmds(): Check if it's an a.out-format executable
* with an vax1k magic number.
*
* Given a proc pointer and an exec package pointer, see if the referent
* of the epp is in a.out format. Just check 'standard' magic numbers for
* this architecture.
*
* 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_vax1k_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
u_long midmag, magic;
u_short mid;
int error;
struct exec *execp = epp->ep_hdr;
if (epp->ep_hdrvalid < sizeof(struct exec))
return ENOEXEC;
midmag = ntohl(execp->a_midmag);
mid = (midmag >> 16) & 0x3ff;
magic = midmag & 0xffff;
midmag = mid << 16 | magic;
switch (midmag) {
case (MID_VAX1K << 16) | ZMAGIC:
error = exec_vax1k_prep_anymagic(p, epp, 0);
break;
case (MID_VAX1K << 16) | NMAGIC:
case (MID_VAX1K << 16) | OMAGIC:
error = exec_vax1k_prep_anymagic(p, epp, sizeof(struct exec));
break;
default:
error = ENOEXEC;
}
if (error)
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* exec_vax1k_prep_anymagic(): Prepare an vax1k ?MAGIC binary's exec package
*
* First, set of the various offsets/lengths in the exec package.
* Note that all code is mapped RW; no protection, but because it is
* only used for compatibility it won't hurt.
*
*/
int
exec_vax1k_prep_anymagic(p, epp, off)
struct proc *p;
struct exec_package *epp;
int off;
{
long etmp, tmp;
struct exec *execp = epp->ep_hdr;
epp->ep_taddr = execp->a_entry & ~(VAX1K_USRTEXT - 1);
epp->ep_tsize = execp->a_text + execp->a_data;
epp->ep_daddr = epp->ep_tsize + epp->ep_taddr;
epp->ep_dsize = execp->a_bss;
epp->ep_entry = execp->a_entry;
/* set up command for text segment */
NEW_VMCMD(&epp->ep_vmcmds, vax1k_map_readvn,
epp->ep_tsize, epp->ep_taddr, epp->ep_vp, off,
VM_PROT_WRITE|VM_PROT_READ|VM_PROT_EXECUTE);
tmp = round_page(epp->ep_daddr);
etmp = execp->a_bss - (tmp - epp->ep_daddr);
/* set up command for bss segment */
if (etmp > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, etmp, tmp, NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return exec_setup_stack(p, epp);
}
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