sys/compat/ibcs2/ibcs2_exec_xout.c

   1 /*      $NetBSD: ibcs2_exec_xout.c,v 1.17 2007/12/04 18:40:10 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994, 1995, 1998 Scott Bartram
   5  * Copyright (c) 1994 Adam Glass
   6  * Copyright (c) 1993, 1994 Christopher G. Demetriou
   7  * All rights reserved.
   8  *
   9  * originally from kern/exec_ecoff.c
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by Scott Bartram.
  22  * 4. The name of the author may not be used to endorse or promote products
  23  *    derived from this software without specific prior written permission
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: ibcs2_exec_xout.c,v 1.17 2007/12/04 18:40:10 dsl Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/proc.h>
  44 #include <sys/malloc.h>
  45 #include <sys/namei.h>
  46 #include <sys/vnode.h>
  47 #include <sys/mount.h>
  48 #include <sys/exec.h>
  49 #include <sys/resourcevar.h>
  50
  51 #include <sys/mman.h>
  52 #include <sys/syscallargs.h>
  53
  54 #include <sys/cpu.h>
  55 #include <machine/reg.h>
  56 #include <machine/ibcs2_machdep.h>
  57
  58 #include <compat/ibcs2/ibcs2_types.h>
  59 #include <compat/ibcs2/ibcs2_exec.h>
  60 #include <compat/ibcs2/ibcs2_errno.h>
  61 #include <compat/ibcs2/ibcs2_util.h>
  62 #include <compat/ibcs2/ibcs2_syscall.h>
  63
  64 int exec_ibcs2_xout_prep_nmagic(struct lwp *, struct exec_package *,
  65                                      struct xexec *, struct xext *);
  66 int exec_ibcs2_xout_prep_zmagic(struct lwp *, struct exec_package *,
  67                                      struct xexec *, struct xext *);
  68
  69 int
  70 exec_ibcs2_xout_makecmds(struct lwp *l, struct exec_package *epp)
  71 {
  72         int error;
  73         struct xexec *xp = epp->ep_hdr;
  74         struct xext *xep;
  75
  76         if (epp->ep_hdrvalid < XOUT_HDR_SIZE)
  77                 return ENOEXEC;
  78
  79         if ((xp->x_magic != XOUT_MAGIC) || (xp->x_cpu != XC_386))
  80                 return ENOEXEC;
  81         if ((xp->x_renv & (XE_ABS | XE_VMOD)) || !(xp->x_renv & XE_EXEC))
  82                 return ENOEXEC;
  83
  84         xep = (void *)((char *)epp->ep_hdr + sizeof(struct xexec));
  85 #ifdef notyet
  86         if (xp->x_renv & XE_PURE)
  87                 error = exec_ibcs2_xout_prep_zmagic(l, epp, xp, xep);
  88         else
  89 #endif
  90                 error = exec_ibcs2_xout_prep_nmagic(l, epp, xp, xep);
  91
  92         if (error)
  93                 kill_vmcmds(&epp->ep_vmcmds);
  94
  95         return error;
  96 }
  97
  98 /*
  99  * exec_ibcs2_xout_prep_nmagic(): Prepare a pure x.out binary's exec package
 100  *
 101  */
 102
 103 int
 104 exec_ibcs2_xout_prep_nmagic(struct lwp *l, struct exec_package *epp, struct xexec *xp, struct xext *xep)
 105 {
 106         int error;
 107         size_t nseg, i;
 108         long baddr, bsize;
 109         struct xseg *xs;
 110         size_t resid;
 111         size_t segsize = (size_t)xep->xe_segsize;
 112
 113         if (segsize > 16 * sizeof(*xs))
 114                 return ENOEXEC;
 115
 116         /* read in segment table */
 117         xs = (struct xseg *)malloc(segsize, M_TEMP, M_WAITOK);
 118         error = vn_rdwr(UIO_READ, epp->ep_vp, (void *)xs,
 119                         segsize, xep->xe_segpos,
 120                         UIO_SYSSPACE, IO_NODELOCKED, l->l_cred,
 121                         &resid, NULL);
 122         if (error) {
 123                 DPRINTF(("segment table read error %d\n", error));
 124                 free(xs, M_TEMP);
 125                 return ENOEXEC;
 126         }
 127
 128         for (nseg = segsize / sizeof(*xs), i = 0; i < nseg; i++) {
 129                 switch (xs[i].xs_type) {
 130                 case XS_TTEXT:  /* text segment */
 131
 132                         DPRINTF(("text addr %lx psize %ld vsize %ld off %ld\n",
 133                                  xs[i].xs_rbase, xs[i].xs_psize,
 134                                  xs[i].xs_vsize, xs[i].xs_filpos));
 135
 136                         epp->ep_taddr = xs[i].xs_rbase; /* XXX - align ??? */
 137                         epp->ep_tsize = xs[i].xs_vsize;
 138
 139                         DPRINTF(("VMCMD: addr %lx size %ld offset %ld\n",
 140                                  epp->ep_taddr, epp->ep_tsize,
 141                                  xs[i].xs_filpos));
 142                         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
 143                                   epp->ep_tsize, epp->ep_taddr,
 144                                   epp->ep_vp, xs[i].xs_filpos,
 145                                   VM_PROT_READ|VM_PROT_EXECUTE);
 146                         break;
 147
 148                 case XS_TDATA:  /* data segment */
 149
 150                         DPRINTF(("data addr %lx psize %ld vsize %ld off %ld\n",
 151                                  xs[i].xs_rbase, xs[i].xs_psize,
 152                                  xs[i].xs_vsize, xs[i].xs_filpos));
 153
 154                         epp->ep_daddr = xs[i].xs_rbase; /* XXX - align ??? */
 155                         epp->ep_dsize = xs[i].xs_vsize;
 156
 157                         DPRINTF(("VMCMD: addr %lx size %ld offset %ld\n",
 158                                  epp->ep_daddr, xs[i].xs_psize,
 159                                  xs[i].xs_filpos));
 160                         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
 161                                   xs[i].xs_psize, epp->ep_daddr,
 162                                   epp->ep_vp, xs[i].xs_filpos,
 163                                   VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 164
 165                         /* set up command for bss segment */
 166                         baddr = round_page(epp->ep_daddr + xs[i].xs_psize);
 167                         bsize = epp->ep_daddr + epp->ep_dsize - baddr;
 168                         if (bsize > 0) {
 169                                 DPRINTF(("VMCMD: bss addr %lx size %ld off %d\n",
 170                                          baddr, bsize, 0));
 171                                 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
 172                                           bsize, baddr, NULLVP, 0,
 173                                           VM_PROT_READ|VM_PROT_WRITE|
 174                                           VM_PROT_EXECUTE);
 175                         }
 176                         break;
 177
 178                 default:
 179                         break;
 180                 }
 181         }
 182
 183         /* set up entry point */
 184         epp->ep_entry = xp->x_entry;
 185
 186         DPRINTF(("text addr: %lx size: %ld data addr: %lx size: %ld entry: %lx\n",
 187                  epp->ep_taddr, epp->ep_tsize,
 188                  epp->ep_daddr, epp->ep_dsize,
 189                  epp->ep_entry));
 190
 191         free(xs, M_TEMP);
 192         return (*epp->ep_esch->es_setup_stack)(l, epp);
 193 }