677 lines
20 KiB
C
677 lines
20 KiB
C
/* $NetBSD: ibcs2_exec_coff.c,v 1.1 2000/12/01 19:17:41 jdolecek 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/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/exec_coff.h>
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#include <sys/resourcevar.h>
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#include <sys/mman.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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int exec_ibcs2_coff_prep_omagic __P((struct proc *, struct exec_package *,
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struct coff_filehdr *,
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struct coff_aouthdr *));
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int exec_ibcs2_coff_prep_nmagic __P((struct proc *, struct exec_package *,
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struct coff_filehdr *,
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struct coff_aouthdr *));
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int exec_ibcs2_coff_prep_zmagic __P((struct proc *, struct exec_package *,
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struct coff_filehdr *,
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struct coff_aouthdr *));
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int exec_ibcs2_coff_setup_stack __P((struct proc *, struct exec_package *));
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void cpu_exec_ibcs2_coff_setup __P((int, struct proc *, struct exec_package *,
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void *));
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static int coff_load_shlib __P((struct proc *, const char *,
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struct exec_package *));
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static int coff_find_section __P((struct proc *, struct vnode *,
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struct coff_filehdr *, struct coff_scnhdr *,
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int));
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/*
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* exec_ibcs2_coff_makecmds(): Check if it's an coff-format executable.
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*
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* Given a proc pointer and an exec package pointer, see if the referent
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* of the epp is in coff format. Check 'standard' magic numbers for
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* this architecture. If that fails, return failure.
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*
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* This function is responsible for creating a set of vmcmds which can be
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* used to build the process's vm space and inserting them into the exec
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* package.
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*/
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int
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exec_ibcs2_coff_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 coff_filehdr *fp = epp->ep_hdr;
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struct coff_aouthdr *ap;
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if (epp->ep_hdrvalid < COFF_HDR_SIZE) {
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DPRINTF(("ibcs2: bad coff hdr size\n"));
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return ENOEXEC;
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}
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if (COFF_BADMAG(fp)) {
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DPRINTF(("ibcs2: bad coff magic\n"));
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return ENOEXEC;
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}
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ap = (void *)((char *)epp->ep_hdr + sizeof(struct coff_filehdr));
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switch (ap->a_magic) {
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case COFF_OMAGIC:
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error = exec_ibcs2_coff_prep_omagic(p, epp, fp, ap);
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break;
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case COFF_NMAGIC:
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error = exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap);
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break;
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case COFF_ZMAGIC:
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error = exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap);
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break;
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default:
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return ENOEXEC;
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}
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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_coff_setup_stack(): Set up the stack segment for a coff
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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_coff_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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/* DPRINTF(("enter exec_ibcs2_coff_setup_stack\n")); */
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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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/* DPRINTF(("VMCMD: addr %x size %d\n", epp->ep_maxsaddr,
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(epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr)); */
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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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/* DPRINTF(("VMCMD: addr %x size %d\n",
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epp->ep_minsaddr - epp->ep_ssize,
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epp->ep_ssize)); */
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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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/*
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* exec_ibcs2_coff_prep_omagic(): Prepare a COFF OMAGIC binary's exec package
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*/
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int
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exec_ibcs2_coff_prep_omagic(p, epp, fp, ap)
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struct proc *p;
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struct exec_package *epp;
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struct coff_filehdr *fp;
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struct coff_aouthdr *ap;
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{
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epp->ep_taddr = COFF_SEGMENT_ALIGN(fp, ap, ap->a_tstart);
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epp->ep_tsize = ap->a_tsize;
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epp->ep_daddr = COFF_SEGMENT_ALIGN(fp, ap, ap->a_dstart);
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epp->ep_dsize = ap->a_dsize;
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epp->ep_entry = ap->a_entry;
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DPRINTF(("ibcs2_omagic: text=%#lx/%#lx, data=%#lx/%#lx, bss=%#lx/%#lx, 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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ap->a_dstart + ap->a_dsize, ap->a_bsize,
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epp->ep_entry));
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/* set up command for text and data segments */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
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ap->a_tsize + ap->a_dsize, epp->ep_taddr, epp->ep_vp,
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COFF_TXTOFF(fp, ap),
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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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if (ap->a_bsize > 0) {
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
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COFF_SEGMENT_ALIGN(fp, ap, ap->a_dstart + ap->a_dsize),
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NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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epp->ep_dsize += ap->a_bsize;
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}
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/* The following is to make obreak(2) happy. It expects daddr
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* to on a page boundary and will round up dsize to a page
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* address.
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*/
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if (trunc_page(epp->ep_daddr) != epp->ep_daddr) {
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epp->ep_dsize += epp->ep_daddr - trunc_page(epp->ep_daddr);
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epp->ep_daddr = trunc_page(epp->ep_daddr);
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if (epp->ep_taddr + epp->ep_tsize > epp->ep_daddr)
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epp->ep_tsize = epp->ep_daddr - epp->ep_taddr;
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}
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return exec_ibcs2_coff_setup_stack(p, epp);
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}
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/*
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* exec_ibcs2_coff_prep_nmagic(): Prepare a 'native' NMAGIC COFF binary's exec
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* package.
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*/
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int
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exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap)
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struct proc *p;
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struct exec_package *epp;
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struct coff_filehdr *fp;
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struct coff_aouthdr *ap;
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{
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long toverlap, doverlap;
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u_long tsize, tend;
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epp->ep_taddr = ap->a_tstart;
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epp->ep_tsize = ap->a_tsize;
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epp->ep_daddr = ap->a_dstart;
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epp->ep_dsize = ap->a_dsize;
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epp->ep_entry = ap->a_entry;
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DPRINTF(("ibcs2_nmagic: text=%#lx/%#lx, data=%#lx/%#lx, bss=%#lx/%#lx, 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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ap->a_dstart + ap->a_dsize, ap->a_bsize,
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epp->ep_entry));
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/* Do the text and data pages overlap?
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*/
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tend = epp->ep_taddr + epp->ep_tsize - 1;
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if (trunc_page(tend) == trunc_page(epp->ep_daddr)) {
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/* If the first page of text is the first page of data,
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* then we consider it all data.
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*/
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if (trunc_page(epp->ep_taddr) == trunc_page(epp->ep_daddr)) {
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tsize = 0;
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} else {
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tsize = trunc_page(tend) - epp->ep_taddr;
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}
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/* If the text and data file and VA offsets are the
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* same, simply bring the data segment to start on
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* the start of the page.
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*/
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if (epp->ep_daddr - epp->ep_taddr ==
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COFF_DATOFF(fp, ap) - COFF_TXTOFF(fp, ap)) {
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u_long diff = epp->ep_daddr - trunc_page(epp->ep_daddr);
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toverlap = 0;
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doverlap = -diff;
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} else {
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/* otherwise copy the individual pieces */
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toverlap = epp->ep_tsize - tsize;
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doverlap = round_page(epp->ep_daddr) - epp->ep_daddr;
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if (doverlap > epp->ep_dsize)
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doverlap = epp->ep_dsize;
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}
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} else {
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tsize = epp->ep_tsize;
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toverlap = 0;
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doverlap = 0;
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}
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DPRINTF(("nmagic_vmcmds:"));
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if (tsize > 0) {
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/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, tsize,
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epp->ep_taddr, epp->ep_vp, COFF_TXTOFF(fp, ap),
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VM_PROT_READ|VM_PROT_EXECUTE);
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DPRINTF((" map_readvn(%#lx/%#lx@%#lx)",
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epp->ep_taddr, tsize, (u_long) COFF_TXTOFF(fp, ap)));
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}
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if (toverlap > 0) {
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, toverlap,
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epp->ep_taddr + tsize, epp->ep_vp,
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COFF_TXTOFF(fp, ap) + tsize,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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DPRINTF((" map_readvn(%#lx/%#lx@%#lx)",
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epp->ep_taddr + tsize, toverlap,
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COFF_TXTOFF(fp, ap) + tsize));
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_readvn, doverlap,
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epp->ep_daddr, epp->ep_vp,
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COFF_DATOFF(fp, ap),
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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DPRINTF((" readvn(%#lx/%#lx@%#lx)", epp->ep_daddr, doverlap,
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COFF_DATOFF(fp, ap)));
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}
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if (epp->ep_dsize > doverlap || doverlap < 0) {
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/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
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epp->ep_dsize - doverlap, epp->ep_daddr + doverlap,
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epp->ep_vp, COFF_DATOFF(fp, ap) + doverlap,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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DPRINTF((" map_readvn(%#lx/%#lx@%#lx)",
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epp->ep_daddr + doverlap, epp->ep_dsize - doverlap,
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COFF_DATOFF(fp, ap) + doverlap));
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}
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/* Handle page remainders for pagedvn.
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*/
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/* set up command for bss segment */
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if (ap->a_bsize > 0) {
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u_long dend = round_page(epp->ep_daddr + epp->ep_dsize);
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u_long dspace = dend - (epp->ep_daddr + epp->ep_dsize);
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if (ap->a_bsize > dspace) {
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
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ap->a_bsize - dspace, dend, NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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DPRINTF((" map_zero(%#lx/%#lx)",
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dend, ap->a_bsize - dspace));
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}
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epp->ep_dsize += ap->a_bsize;
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}
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DPRINTF(("\n"));
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/* The following is to make obreak(2) happy. It expects daddr
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* to on a page boundary and will round up dsize to a page
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* address.
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*/
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if (trunc_page(epp->ep_daddr) != epp->ep_daddr) {
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epp->ep_dsize += epp->ep_daddr - trunc_page(epp->ep_daddr);
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epp->ep_daddr = trunc_page(epp->ep_daddr);
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if (epp->ep_taddr + epp->ep_tsize > epp->ep_daddr)
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epp->ep_tsize = epp->ep_daddr - epp->ep_taddr;
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}
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return exec_ibcs2_coff_setup_stack(p, epp);
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}
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/*
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* coff_find_section - load specified section header
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*
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* TODO - optimize by reading all section headers in at once
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*/
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static int
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coff_find_section(p, vp, fp, sh, s_type)
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struct proc *p;
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struct vnode *vp;
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struct coff_filehdr *fp;
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struct coff_scnhdr *sh;
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int s_type;
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{
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int i, pos, siz, error;
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size_t resid;
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pos = COFF_HDR_SIZE;
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for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) {
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siz = sizeof(struct coff_scnhdr);
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error = vn_rdwr(UIO_READ, vp, (caddr_t) sh,
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siz, pos, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
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&resid, p);
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if (error) {
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DPRINTF(("section hdr %d read error %d\n", i, error));
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return error;
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}
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siz -= resid;
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if (siz != sizeof(struct coff_scnhdr)) {
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DPRINTF(("incomplete read: hdr %d ask=%d, rem=%lu got %d\n",
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s_type, sizeof(struct coff_scnhdr),
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(u_long) resid, siz));
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return ENOEXEC;
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}
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/* DPRINTF(("found section: %x\n", sh->s_flags)); */
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if (sh->s_flags == s_type)
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return 0;
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}
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return ENOEXEC;
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}
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/*
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* exec_ibcs2_coff_prep_zmagic(): Prepare a COFF ZMAGIC binary's exec package
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*
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* First, set the various offsets/lengths in the exec package.
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*
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* Then, mark the text image busy (so it can be demand paged) or error
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* out if this is not possible. Finally, set up vmcmds for the
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* text, data, bss, and stack segments.
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*/
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int
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exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap)
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struct proc *p;
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struct exec_package *epp;
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struct coff_filehdr *fp;
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struct coff_aouthdr *ap;
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{
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int error;
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u_long offset;
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long dsize, baddr, bsize;
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struct coff_scnhdr sh;
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/* DPRINTF(("enter exec_ibcs2_coff_prep_zmagic\n")); */
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/* set up command for text segment */
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error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_TEXT);
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if (error) {
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DPRINTF(("can't find text section: %d\n", error));
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return error;
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}
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/* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr,
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sh.s_size, sh.s_scnptr)); */
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epp->ep_taddr = COFF_ALIGN(sh.s_vaddr);
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offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_taddr);
|
|
epp->ep_tsize = sh.s_size + (sh.s_vaddr - epp->ep_taddr);
|
|
|
|
#ifdef notyet
|
|
/*
|
|
* check if vnode is in open for writing, because we want to
|
|
* demand-page out of it. if it is, don't do it, for various
|
|
* reasons
|
|
n */
|
|
if ((ap->a_tsize != 0 || ap->a_dsize != 0) &&
|
|
epp->ep_vp->v_writecount != 0) {
|
|
#ifdef DIAGNOSTIC
|
|
if (epp->ep_vp->v_flag & VTEXT)
|
|
panic("exec: a VTEXT vnode has writecount != 0\n");
|
|
#endif
|
|
return ETXTBSY;
|
|
}
|
|
vn_marktext(epp->ep_vp);
|
|
#endif
|
|
|
|
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_taddr,
|
|
epp->ep_tsize, offset)); */
|
|
#ifdef notyet
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, epp->ep_tsize,
|
|
epp->ep_taddr, epp->ep_vp, offset,
|
|
VM_PROT_READ|VM_PROT_EXECUTE);
|
|
#else
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
|
|
epp->ep_taddr, epp->ep_vp, offset,
|
|
VM_PROT_READ|VM_PROT_EXECUTE);
|
|
#endif
|
|
|
|
/* set up command for data segment */
|
|
error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_DATA);
|
|
if (error) {
|
|
DPRINTF(("can't find data section: %d\n", error));
|
|
return error;
|
|
}
|
|
/* DPRINTF(("COFF data addr %x size %d offset %d\n", sh.s_vaddr,
|
|
sh.s_size, sh.s_scnptr)); */
|
|
epp->ep_daddr = COFF_ALIGN(sh.s_vaddr);
|
|
offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_daddr);
|
|
dsize = sh.s_size + (sh.s_vaddr - epp->ep_daddr);
|
|
epp->ep_dsize = dsize + ap->a_bsize;
|
|
|
|
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_daddr,
|
|
dsize, offset)); */
|
|
#ifdef notyet
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, dsize,
|
|
epp->ep_daddr, epp->ep_vp, offset,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
#else
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
|
|
dsize, epp->ep_daddr, epp->ep_vp, offset,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
#endif
|
|
|
|
/* set up command for bss segment */
|
|
baddr = round_page(epp->ep_daddr + dsize);
|
|
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
|
|
if (bsize > 0) {
|
|
/* DPRINTF(("VMCMD: addr %x size %d offset %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);
|
|
}
|
|
|
|
/* load any shared libraries */
|
|
error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_SHLIB);
|
|
if (!error) {
|
|
size_t resid;
|
|
struct coff_slhdr *slhdr;
|
|
char *buf, *bufp;
|
|
int len = sh.s_size, path_index, entry_len;
|
|
|
|
#if 0
|
|
if (len > COFF_SHLIBSEC_MAXSIZE) {
|
|
return ENOEXEC;
|
|
}
|
|
#endif
|
|
buf = (char *) malloc(len, M_TEMP, M_WAITOK);
|
|
if (buf == NULL)
|
|
return ENOEXEC;
|
|
|
|
/* DPRINTF(("COFF shlib size %d offset %d\n",
|
|
sh.s_size, sh.s_scnptr)); */
|
|
|
|
error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t) buf,
|
|
len, sh.s_scnptr,
|
|
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
|
|
&resid, p);
|
|
if (error) {
|
|
DPRINTF(("shlib section read error %d\n", error));
|
|
free(buf, M_TEMP);
|
|
return ENOEXEC;
|
|
}
|
|
bufp = buf;
|
|
while (len) {
|
|
slhdr = (struct coff_slhdr *)bufp;
|
|
path_index = slhdr->path_index * sizeof(long);
|
|
entry_len = slhdr->entry_len * sizeof(long);
|
|
|
|
if (entry_len > len) {
|
|
free(buf, M_TEMP);
|
|
return ENOEXEC;
|
|
}
|
|
|
|
/* DPRINTF(("path_index: %d entry_len: %d name: %s\n",
|
|
path_index, entry_len, slhdr->sl_name)); */
|
|
|
|
error = coff_load_shlib(p, slhdr->sl_name, epp);
|
|
if (error) {
|
|
free(buf, M_TEMP);
|
|
return ENOEXEC;
|
|
}
|
|
bufp += entry_len;
|
|
len -= entry_len;
|
|
}
|
|
free(buf, M_TEMP);
|
|
}
|
|
|
|
/* set up entry point */
|
|
epp->ep_entry = ap->a_entry;
|
|
|
|
DPRINTF(("ibcs2_zmagic: text addr: %#lx size: %#lx data addr: %#lx size: %#lx entry: %#lx\n",
|
|
epp->ep_taddr, epp->ep_tsize,
|
|
epp->ep_daddr, epp->ep_dsize,
|
|
epp->ep_entry));
|
|
|
|
/* The following is to make obreak(2) happy. It expects daddr
|
|
* to on a page boundary and will round up dsize to a page
|
|
* address.
|
|
*/
|
|
if (trunc_page(epp->ep_daddr) != epp->ep_daddr) {
|
|
epp->ep_dsize += epp->ep_daddr - trunc_page(epp->ep_daddr);
|
|
epp->ep_daddr = trunc_page(epp->ep_daddr);
|
|
if (epp->ep_taddr + epp->ep_tsize > epp->ep_daddr)
|
|
epp->ep_tsize = epp->ep_daddr - epp->ep_taddr;
|
|
}
|
|
|
|
|
|
return exec_ibcs2_coff_setup_stack(p, epp);
|
|
}
|
|
|
|
static int
|
|
coff_load_shlib(p, path, epp)
|
|
struct proc *p;
|
|
const char *path;
|
|
struct exec_package *epp;
|
|
{
|
|
int error, siz;
|
|
int taddr, tsize, daddr, dsize, offset;
|
|
size_t resid;
|
|
struct nameidata nd;
|
|
struct coff_filehdr fh, *fhp = &fh;
|
|
struct coff_scnhdr sh, *shp = &sh;
|
|
|
|
/*
|
|
* 1. open shlib file
|
|
* 2. read filehdr
|
|
* 3. map text, data, and bss out of it using VM_*
|
|
*/
|
|
CHECK_ALT_EXIST(p, NULL, path); /* path is on kernel stack */
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p);
|
|
/* first get the vnode */
|
|
if ((error = namei(&nd)) != 0) {
|
|
DPRINTF(("coff_load_shlib: can't find library %s\n", path));
|
|
return error;
|
|
}
|
|
|
|
siz = sizeof(struct coff_filehdr);
|
|
error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t) fhp, siz, 0,
|
|
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p);
|
|
if (error) {
|
|
DPRINTF(("filehdr read error %d\n", error));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
siz -= resid;
|
|
if (siz != sizeof(struct coff_filehdr)) {
|
|
DPRINTF(("coff_load_shlib: incomplete read: ask=%d, rem=%lu got %d\n",
|
|
sizeof(struct coff_filehdr), (u_long) resid, siz));
|
|
vrele(nd.ni_vp);
|
|
return ENOEXEC;
|
|
}
|
|
|
|
/* load text */
|
|
error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_TEXT);
|
|
if (error) {
|
|
DPRINTF(("can't find shlib text section\n"));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
/* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr,
|
|
sh.s_size, sh.s_scnptr)); */
|
|
taddr = COFF_ALIGN(shp->s_vaddr);
|
|
offset = shp->s_scnptr - (shp->s_vaddr - taddr);
|
|
tsize = shp->s_size + (shp->s_vaddr - taddr);
|
|
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", taddr, tsize, offset)); */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, tsize, taddr,
|
|
nd.ni_vp, offset,
|
|
VM_PROT_READ|VM_PROT_EXECUTE);
|
|
|
|
/* load data */
|
|
error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_DATA);
|
|
if (error) {
|
|
DPRINTF(("can't find shlib data section\n"));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
/* DPRINTF(("COFF data addr %x size %d offset %d\n", shp->s_vaddr,
|
|
shp->s_size, shp->s_scnptr)); */
|
|
daddr = COFF_ALIGN(shp->s_vaddr);
|
|
offset = shp->s_scnptr - (shp->s_vaddr - daddr);
|
|
dsize = shp->s_size + (shp->s_vaddr - daddr);
|
|
/* epp->ep_dsize = dsize + ap->a_bsize; */
|
|
|
|
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", daddr, dsize, offset)); */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
|
|
dsize, daddr, nd.ni_vp, offset,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* load bss */
|
|
error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_BSS);
|
|
if (!error) {
|
|
int baddr = round_page(daddr + dsize);
|
|
int bsize = daddr + dsize + shp->s_size - baddr;
|
|
if (bsize > 0) {
|
|
/* DPRINTF(("VMCMD: addr %x size %d offset %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);
|
|
}
|
|
}
|
|
vrele(nd.ni_vp);
|
|
|
|
return 0;
|
|
}
|