NetBSD/sys/compat/ibcs2/ibcs2_exec_xout.c

239 lines
7.3 KiB
C

/* $NetBSD: ibcs2_exec_xout.c,v 1.2 2001/11/13 02:08:24 lukem Exp $ */
/*
* Copyright (c) 1994, 1995, 1998 Scott Bartram
* Copyright (c) 1994 Adam Glass
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* All rights reserved.
*
* originally from kern/exec_ecoff.c
*
* 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 Scott Bartram.
* 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: ibcs2_exec_xout.c,v 1.2 2001/11/13 02:08:24 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/exec.h>
#include <sys/resourcevar.h>
#include <sys/mman.h>
#include <sys/syscallargs.h>
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/ibcs2_machdep.h>
#include <compat/ibcs2/ibcs2_types.h>
#include <compat/ibcs2/ibcs2_exec.h>
#include <compat/ibcs2/ibcs2_errno.h>
#include <compat/ibcs2/ibcs2_util.h>
#include <compat/ibcs2/ibcs2_syscall.h>
int exec_ibcs2_xout_prep_nmagic __P((struct proc *, struct exec_package *,
struct xexec *, struct xext *));
int exec_ibcs2_xout_prep_zmagic __P((struct proc *, struct exec_package *,
struct xexec *, struct xext *));
int exec_ibcs2_xout_setup_stack __P((struct proc *, struct exec_package *));
int
exec_ibcs2_xout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
int error;
struct xexec *xp = epp->ep_hdr;
struct xext *xep;
if (epp->ep_hdrvalid < XOUT_HDR_SIZE)
return ENOEXEC;
if ((xp->x_magic != XOUT_MAGIC) || (xp->x_cpu != XC_386))
return ENOEXEC;
if ((xp->x_renv & (XE_ABS | XE_VMOD)) || !(xp->x_renv & XE_EXEC))
return ENOEXEC;
xep = (void *)((char *)epp->ep_hdr + sizeof(struct xexec));
#ifdef notyet
if (xp->x_renv & XE_PURE)
error = exec_ibcs2_xout_prep_zmagic(p, epp, xp, xep);
else
#endif
error = exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep);
if (error)
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* exec_ibcs2_xout_prep_nmagic(): Prepare a pure x.out binary's exec package
*
*/
int
exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep)
struct proc *p;
struct exec_package *epp;
struct xexec *xp;
struct xext *xep;
{
int error, nseg, i;
long baddr, bsize;
struct xseg *xs;
size_t resid;
/* read in segment table */
xs = (struct xseg *)malloc(xep->xe_segsize, M_TEMP, M_WAITOK);
error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t)xs,
xep->xe_segsize, xep->xe_segpos,
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
&resid, p);
if (error) {
DPRINTF(("segment table read error %d\n", error));
free(xs, M_TEMP);
return ENOEXEC;
}
for (nseg = xep->xe_segsize / sizeof(*xs), i = 0; i < nseg; i++) {
switch (xs[i].xs_type) {
case XS_TTEXT: /* text segment */
DPRINTF(("text addr %lx psize %ld vsize %ld off %ld\n",
xs[i].xs_rbase, xs[i].xs_psize,
xs[i].xs_vsize, xs[i].xs_filpos));
epp->ep_taddr = xs[i].xs_rbase; /* XXX - align ??? */
epp->ep_tsize = xs[i].xs_vsize;
DPRINTF(("VMCMD: addr %lx size %ld offset %ld\n",
epp->ep_taddr, epp->ep_tsize,
xs[i].xs_filpos));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
epp->ep_tsize, epp->ep_taddr,
epp->ep_vp, xs[i].xs_filpos,
VM_PROT_READ|VM_PROT_EXECUTE);
break;
case XS_TDATA: /* data segment */
DPRINTF(("data addr %lx psize %ld vsize %ld off %ld\n",
xs[i].xs_rbase, xs[i].xs_psize,
xs[i].xs_vsize, xs[i].xs_filpos));
epp->ep_daddr = xs[i].xs_rbase; /* XXX - align ??? */
epp->ep_dsize = xs[i].xs_vsize;
DPRINTF(("VMCMD: addr %lx size %ld offset %ld\n",
epp->ep_daddr, xs[i].xs_psize,
xs[i].xs_filpos));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
xs[i].xs_psize, epp->ep_daddr,
epp->ep_vp, xs[i].xs_filpos,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
baddr = round_page(epp->ep_daddr + xs[i].xs_psize);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
if (bsize > 0) {
DPRINTF(("VMCMD: bss addr %lx size %ld off %d\n",
baddr, bsize, 0));
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
bsize, baddr, NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|
VM_PROT_EXECUTE);
}
break;
default:
break;
}
}
/* set up entry point */
epp->ep_entry = xp->x_entry;
DPRINTF(("text addr: %lx size: %ld data addr: %lx size: %ld entry: %lx\n",
epp->ep_taddr, epp->ep_tsize,
epp->ep_daddr, epp->ep_dsize,
epp->ep_entry));
free(xs, M_TEMP);
return exec_ibcs2_xout_setup_stack(p, epp);
}
/*
* exec_ibcs2_xout_setup_stack(): Set up the stack segment for a x.out
* executable.
*
* Note that the ep_ssize parameter must be set to be the current stack
* limit; this is adjusted in the body of execve() to yield the
* appropriate stack segment usage once the argument length is
* calculated.
*
* This function returns an int for uniformity with other (future) formats'
* stack setup functions. They might have errors to return.
*/
int
exec_ibcs2_xout_setup_stack(p, epp)
struct proc *p;
struct exec_package *epp;
{
epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
epp->ep_minsaddr = USRSTACK;
epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
/*
* set up commands for stack. note that this takes *two*, one to
* map the part of the stack which we can access, and one to map
* the part which we can't.
*
* arguably, it could be made into one, but that would require the
* addition of another mapping proc, which is unnecessary
*
* note that in memory, things assumed to be: 0 ....... ep_maxsaddr
* <stack> ep_minsaddr
*/
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
(epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return 0;
}