195 lines
6.0 KiB
C
195 lines
6.0 KiB
C
/* $NetBSD: vax1k_exec.c,v 1.9 2003/08/08 18:57:08 christos 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/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: vax1k_exec.c,v 1.9 2003/08/08 18:57:08 christos Exp $");
|
|
|
|
#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>
|
|
|
|
#if defined(_KERNEL_OPT)
|
|
#include "opt_compat_43.h"
|
|
#else
|
|
#define COMPAT_43 /* enable 4.3BSD binaries for lkm */
|
|
#endif
|
|
|
|
int exec_vax1k_prep_anymagic __P((struct proc *p, struct exec_package *epp,
|
|
int, 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, 0);
|
|
goto done;
|
|
|
|
case (MID_VAX1K << 16) | NMAGIC:
|
|
error = exec_vax1k_prep_anymagic(p, epp,
|
|
sizeof(struct exec), 1);
|
|
goto done;
|
|
|
|
case (MID_VAX1K << 16) | OMAGIC:
|
|
error = exec_vax1k_prep_anymagic(p, epp,
|
|
sizeof(struct exec), 0);
|
|
goto done;
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* 4.3BSD pre-dates cpu midmag (e.g. MID_VAX1K). instead, we
|
|
* expect a magic number in native byte order.
|
|
*/
|
|
switch (execp->a_midmag) {
|
|
case ZMAGIC:
|
|
error = exec_vax1k_prep_anymagic(p, epp, VAX1K_LDPGSZ, 0);
|
|
goto done;
|
|
|
|
case NMAGIC:
|
|
error = exec_vax1k_prep_anymagic(p, epp,
|
|
sizeof(struct exec), 1);
|
|
goto done;
|
|
|
|
case OMAGIC:
|
|
error = exec_vax1k_prep_anymagic(p, epp,
|
|
sizeof(struct exec), 0);
|
|
goto done;
|
|
}
|
|
#endif
|
|
|
|
/* failed... */
|
|
error = ENOEXEC;
|
|
|
|
done:
|
|
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, text_foffset, textpad)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
int text_foffset, textpad;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
|
|
epp->ep_taddr = execp->a_entry & ~(VAX1K_USRTEXT - 1);
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = epp->ep_taddr + epp->ep_tsize;
|
|
if (textpad) /* pad for NMAGIC? */
|
|
epp->ep_daddr = (epp->ep_daddr + (VAX1K_LDPGSZ - 1)) &
|
|
~(VAX1K_LDPGSZ - 1);
|
|
epp->ep_dsize = execp->a_data;
|
|
epp->ep_entry = execp->a_entry;
|
|
|
|
/* first allocate memory for text+data+bss */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
|
|
round_page(epp->ep_daddr + epp->ep_dsize + execp->a_bss) -
|
|
trunc_page(epp->ep_taddr), /* size */
|
|
trunc_page(epp->ep_taddr), NULLVP, /* addr, vnode */
|
|
0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* then read the text in the area we just allocated */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_readvn,
|
|
epp->ep_tsize, epp->ep_taddr, epp->ep_vp, text_foffset,
|
|
VM_PROT_WRITE|VM_PROT_READ|VM_PROT_EXECUTE);
|
|
|
|
/* next read the data */
|
|
if (epp->ep_dsize) {
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_readvn,
|
|
epp->ep_dsize, epp->ep_daddr, epp->ep_vp,
|
|
text_foffset + epp->ep_tsize,
|
|
VM_PROT_WRITE|VM_PROT_READ|VM_PROT_EXECUTE);
|
|
}
|
|
|
|
/* now bump up the dsize to include the bss so that sbrk works */
|
|
epp->ep_dsize += execp->a_bss;
|
|
|
|
/* finally, setup the stack ... */
|
|
return (*epp->ep_esch->es_setup_stack)(p, epp);
|
|
}
|