240 lines
7.3 KiB
C
240 lines
7.3 KiB
C
/* $NetBSD: ibcs2_exec_xout.c,v 1.3 2003/01/18 07:40:44 thorpej Exp $ */
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/*
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* Copyright (c) 1994, 1995, 1998 Scott Bartram
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* Copyright (c) 1994 Adam Glass
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* Copyright (c) 1993, 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* originally from kern/exec_ecoff.c
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Scott Bartram.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ibcs2_exec_xout.c,v 1.3 2003/01/18 07:40:44 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/resourcevar.h>
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#include <sys/mman.h>
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#include <sys/sa.h>
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#include <sys/syscallargs.h>
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#include <machine/cpu.h>
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#include <machine/reg.h>
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#include <machine/ibcs2_machdep.h>
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#include <compat/ibcs2/ibcs2_types.h>
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#include <compat/ibcs2/ibcs2_exec.h>
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#include <compat/ibcs2/ibcs2_errno.h>
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#include <compat/ibcs2/ibcs2_util.h>
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#include <compat/ibcs2/ibcs2_syscall.h>
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int exec_ibcs2_xout_prep_nmagic __P((struct proc *, struct exec_package *,
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struct xexec *, struct xext *));
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int exec_ibcs2_xout_prep_zmagic __P((struct proc *, struct exec_package *,
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struct xexec *, struct xext *));
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int exec_ibcs2_xout_setup_stack __P((struct proc *, struct exec_package *));
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int
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exec_ibcs2_xout_makecmds(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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int error;
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struct xexec *xp = epp->ep_hdr;
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struct xext *xep;
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if (epp->ep_hdrvalid < XOUT_HDR_SIZE)
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return ENOEXEC;
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if ((xp->x_magic != XOUT_MAGIC) || (xp->x_cpu != XC_386))
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return ENOEXEC;
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if ((xp->x_renv & (XE_ABS | XE_VMOD)) || !(xp->x_renv & XE_EXEC))
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return ENOEXEC;
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xep = (void *)((char *)epp->ep_hdr + sizeof(struct xexec));
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#ifdef notyet
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if (xp->x_renv & XE_PURE)
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error = exec_ibcs2_xout_prep_zmagic(p, epp, xp, xep);
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else
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#endif
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error = exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep);
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if (error)
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kill_vmcmds(&epp->ep_vmcmds);
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return error;
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}
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/*
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* exec_ibcs2_xout_prep_nmagic(): Prepare a pure x.out binary's exec package
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*
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*/
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int
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exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep)
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struct proc *p;
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struct exec_package *epp;
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struct xexec *xp;
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struct xext *xep;
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{
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int error, nseg, i;
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long baddr, bsize;
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struct xseg *xs;
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size_t resid;
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/* read in segment table */
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xs = (struct xseg *)malloc(xep->xe_segsize, M_TEMP, M_WAITOK);
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error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t)xs,
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xep->xe_segsize, xep->xe_segpos,
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UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
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&resid, p);
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if (error) {
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DPRINTF(("segment table read error %d\n", error));
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free(xs, M_TEMP);
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return ENOEXEC;
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}
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for (nseg = xep->xe_segsize / sizeof(*xs), i = 0; i < nseg; i++) {
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switch (xs[i].xs_type) {
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case XS_TTEXT: /* text segment */
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DPRINTF(("text addr %lx psize %ld vsize %ld off %ld\n",
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xs[i].xs_rbase, xs[i].xs_psize,
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xs[i].xs_vsize, xs[i].xs_filpos));
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epp->ep_taddr = xs[i].xs_rbase; /* XXX - align ??? */
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epp->ep_tsize = xs[i].xs_vsize;
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DPRINTF(("VMCMD: addr %lx size %ld offset %ld\n",
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epp->ep_taddr, epp->ep_tsize,
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xs[i].xs_filpos));
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
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epp->ep_tsize, epp->ep_taddr,
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epp->ep_vp, xs[i].xs_filpos,
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VM_PROT_READ|VM_PROT_EXECUTE);
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break;
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case XS_TDATA: /* data segment */
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DPRINTF(("data addr %lx psize %ld vsize %ld off %ld\n",
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xs[i].xs_rbase, xs[i].xs_psize,
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xs[i].xs_vsize, xs[i].xs_filpos));
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epp->ep_daddr = xs[i].xs_rbase; /* XXX - align ??? */
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epp->ep_dsize = xs[i].xs_vsize;
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DPRINTF(("VMCMD: addr %lx size %ld offset %ld\n",
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epp->ep_daddr, xs[i].xs_psize,
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xs[i].xs_filpos));
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
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xs[i].xs_psize, epp->ep_daddr,
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epp->ep_vp, xs[i].xs_filpos,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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baddr = round_page(epp->ep_daddr + xs[i].xs_psize);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0) {
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DPRINTF(("VMCMD: bss addr %lx size %ld off %d\n",
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baddr, bsize, 0));
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
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bsize, baddr, NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|
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VM_PROT_EXECUTE);
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}
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break;
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default:
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break;
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}
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}
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/* set up entry point */
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epp->ep_entry = xp->x_entry;
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DPRINTF(("text addr: %lx size: %ld data addr: %lx size: %ld entry: %lx\n",
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epp->ep_taddr, epp->ep_tsize,
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epp->ep_daddr, epp->ep_dsize,
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epp->ep_entry));
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free(xs, M_TEMP);
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return exec_ibcs2_xout_setup_stack(p, epp);
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}
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/*
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* exec_ibcs2_xout_setup_stack(): Set up the stack segment for a x.out
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* executable.
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*
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* Note that the ep_ssize parameter must be set to be the current stack
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* limit; this is adjusted in the body of execve() to yield the
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* appropriate stack segment usage once the argument length is
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* calculated.
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*
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* This function returns an int for uniformity with other (future) formats'
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* stack setup functions. They might have errors to return.
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*/
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int
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exec_ibcs2_xout_setup_stack(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
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epp->ep_minsaddr = USRSTACK;
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epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
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/*
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* set up commands for stack. note that this takes *two*, one to
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* map the part of the stack which we can access, and one to map
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* the part which we can't.
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*
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* arguably, it could be made into one, but that would require the
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* addition of another mapping proc, which is unnecessary
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*
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* note that in memory, things assumed to be: 0 ....... ep_maxsaddr
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* <stack> ep_minsaddr
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*/
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
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((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
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epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
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(epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return 0;
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}
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