sys/compat/sunos/sunos_exec_aout.c

   1 /*      $NetBSD: sunos_exec_aout.c,v 1.17 2007/12/08 18:36:23 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1993 Theo de Raadt
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __KERNEL_RCSID(0, "$NetBSD: sunos_exec_aout.c,v 1.17 2007/12/08 18:36:23 dsl Exp $");
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/filedesc.h>
  36 #include <sys/kernel.h>
  37 #include <sys/proc.h>
  38 #include <sys/mount.h>
  39 #include <sys/malloc.h>
  40 #include <sys/namei.h>
  41 #include <sys/signalvar.h>
  42 #include <sys/vnode.h>
  43 #include <sys/file.h>
  44 #include <sys/exec.h>
  45 #include <sys/exec_aout.h>
  46 #include <sys/resourcevar.h>
  47 #include <sys/wait.h>
  48
  49 #include <sys/mman.h>
  50
  51 #include <sys/cpu.h>
  52 #include <machine/reg.h>
  53
  54 #include <compat/sunos/sunos.h>
  55 #include <compat/sunos/sunos_exec.h>
  56 #include <compat/sunos/sunos_syscall.h>
  57
  58 #ifdef __sparc__
  59 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic
  60 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic
  61 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic
  62 #endif
  63
  64 int sunos_exec_aout_prep_zmagic(struct lwp *, struct exec_package *);
  65 int sunos_exec_aout_prep_nmagic(struct lwp *, struct exec_package *);
  66 int sunos_exec_aout_prep_omagic(struct lwp *, struct exec_package *);
  67
  68 int
  69 exec_sunos_aout_makecmds(struct lwp *l, struct exec_package *epp)
  70 {
  71         struct sunos_exec *sunmag = epp->ep_hdr;
  72         int error = ENOEXEC;
  73
  74         if (!SUNOS_M_NATIVE(sunmag->a_machtype))
  75                 return (ENOEXEC);
  76
  77         switch (sunmag->a_magic) {
  78         case ZMAGIC:
  79                 error = sunos_exec_aout_prep_zmagic(l, epp);
  80                 break;
  81         case NMAGIC:
  82                 error = sunos_exec_aout_prep_nmagic(l, epp);
  83                 break;
  84         case OMAGIC:
  85                 error = sunos_exec_aout_prep_omagic(l, epp);
  86                 break;
  87         }
  88         return error;
  89 }
  90
  91 /*
  92  * the code below is only needed for sun2/sun3 emulation.
  93  */
  94 #ifndef __sparc__
  95
  96 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
  97 #define SEGSIZ          0x20000
  98 #define SUNOS_N_TXTADDR(x,m)    0x2000
  99 #define SUNOS_N_DATADDR(x,m)    (((m)==OMAGIC) ? \
 100         (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \
 101         (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
 102 #define SUNOS_N_BSSADDR(x,m)    (SUNOS_N_DATADDR(x,m)+(x).a_data)
 103
 104 #define SUNOS_N_TXTOFF(x,m)     ((m)==ZMAGIC ? 0 : sizeof (struct exec))
 105 #define SUNOS_N_DATOFF(x,m)     (SUNOS_N_TXTOFF(x,m) + (x).a_text)
 106
 107 /*
 108  * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package
 109  *
 110  * First, set of the various offsets/lengths in the exec package.
 111  *
 112  * Then, mark the text image busy (so it can be demand paged) or error
 113  * out if this is not possible.  Finally, set up vmcmds for the
 114  * text, data, bss, and stack segments.
 115  */
 116 int
 117 sunos_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp)
 118 {
 119         struct exec *execp = epp->ep_hdr;
 120         int error;
 121
 122         epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC);
 123         epp->ep_tsize = execp->a_text;
 124         epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC);
 125         epp->ep_dsize = execp->a_data + execp->a_bss;
 126         epp->ep_entry = execp->a_entry;
 127
 128         error = vn_marktext(epp->ep_vp);
 129         if (error)
 130                 return (error);
 131
 132         /* set up command for text segment */
 133         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
 134             epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC),
 135             VM_PROT_READ|VM_PROT_EXECUTE);
 136
 137         /* set up command for data segment */
 138         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
 139             epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC),
 140             VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 141
 142         /* set up command for bss segment */
 143         if (execp->a_bss)
 144                 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
 145                     epp->ep_daddr + execp->a_data, NULLVP, 0,
 146                     VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 147
 148         return (*epp->ep_esch->es_setup_stack)(l, epp);
 149 }
 150
 151 /*
 152  * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
 153  */
 154 int
 155 sunos_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp)
 156 {
 157         struct exec *execp = epp->ep_hdr;
 158         long bsize, baddr;
 159
 160         epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC);
 161         epp->ep_tsize = execp->a_text;
 162         epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC);
 163         epp->ep_dsize = execp->a_data + execp->a_bss;
 164         epp->ep_entry = execp->a_entry;
 165
 166         /* set up command for text segment */
 167         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
 168             epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC),
 169             VM_PROT_READ|VM_PROT_EXECUTE);
 170
 171         /* set up command for data segment */
 172         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
 173             epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC),
 174             VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 175
 176         /* set up command for bss segment */
 177         baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
 178         bsize = epp->ep_daddr + epp->ep_dsize - baddr;
 179         if (bsize > 0)
 180                 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
 181                     NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 182
 183         return (*epp->ep_esch->es_setup_stack)(l, epp);
 184 }
 185
 186 /*
 187  * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
 188  */
 189 int
 190 sunos_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp)
 191 {
 192         struct exec *execp = epp->ep_hdr;
 193         long bsize, baddr;
 194
 195         epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC);
 196         epp->ep_tsize = execp->a_text;
 197         epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC);
 198         epp->ep_dsize = execp->a_data + execp->a_bss;
 199         epp->ep_entry = execp->a_entry;
 200
 201         /* set up command for text and data segments */
 202         NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
 203             execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
 204             SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 205
 206         /* set up command for bss segment */
 207         baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
 208         bsize = epp->ep_daddr + epp->ep_dsize - baddr;
 209         if (bsize > 0)
 210                 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
 211                     NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
 212
 213         return (*epp->ep_esch->es_setup_stack)(l, epp);
 214 }
 215 #endif /* !sparc */