FreeBSD/Linux Kernel Cross Reference
sys/compat/sunos/sunos_exec_aout.c

     /*      $NetBSD: sunos_exec_aout.c,v 1.19 2015/10/18 16:59:19 maxv Exp $        */
     
     /*
      * Copyright (c) 1993 Theo de Raadt
      * All rights reserved.
      *
      * 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. 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: sunos_exec_aout.c,v 1.19 2015/10/18 16:59:19 maxv Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/filedesc.h>
    #include <sys/kernel.h>
    #include <sys/proc.h>
    #include <sys/mount.h>
    #include <sys/malloc.h>
    #include <sys/namei.h>
    #include <sys/signalvar.h>
    #include <sys/vnode.h>
    #include <sys/file.h>
    #include <sys/exec.h>
    #include <sys/exec_aout.h>
    #include <sys/resourcevar.h>
    #include <sys/wait.h>
    
    #include <sys/mman.h>
    
    #include <sys/cpu.h>
    #include <machine/reg.h>
    
    #include <compat/sunos/sunos.h>
    #include <compat/sunos/sunos_exec.h>
    #include <compat/sunos/sunos_syscall.h>
    
    #ifdef __sparc__
    #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic
    #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic
    #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic
    #endif
    
    int sunos_exec_aout_prep_zmagic(struct lwp *, struct exec_package *);
    int sunos_exec_aout_prep_nmagic(struct lwp *, struct exec_package *);
    int sunos_exec_aout_prep_omagic(struct lwp *, struct exec_package *);
    
    int
    exec_sunos_aout_makecmds(struct lwp *l, struct exec_package *epp)
    {
            struct sunos_exec *sunmag = epp->ep_hdr;
            int error = ENOEXEC;
    
            if (epp->ep_hdrvalid < sizeof(struct sunos_exec))
                    return ENOEXEC;
            if (!SUNOS_M_NATIVE(sunmag->a_machtype))
                    return (ENOEXEC);
    
            switch (sunmag->a_magic) {
            case ZMAGIC:
                    error = sunos_exec_aout_prep_zmagic(l, epp);
                    break;
            case NMAGIC:
                    error = sunos_exec_aout_prep_nmagic(l, epp);
                    break;
            case OMAGIC:
                    error = sunos_exec_aout_prep_omagic(l, epp);
                    break;
            }
            return error;
    }
    
    /*
     * the code below is only needed for sun2/sun3 emulation.
     */
    #ifndef __sparc__
    
    /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
    #define SEGSIZ          0x20000
   #define SUNOS_N_TXTADDR(x,m)    0x2000
   #define SUNOS_N_DATADDR(x,m)    (((m)==OMAGIC) ? \
           (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \
           (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
   #define SUNOS_N_BSSADDR(x,m)    (SUNOS_N_DATADDR(x,m)+(x).a_data)
   
   #define SUNOS_N_TXTOFF(x,m)     ((m)==ZMAGIC ? 0 : sizeof (struct exec))
   #define SUNOS_N_DATOFF(x,m)     (SUNOS_N_TXTOFF(x,m) + (x).a_text)
   
   /*
    * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package
    *
    * First, set of the various offsets/lengths in the exec package.
    *
    * Then, mark the text image busy (so it can be demand paged) or error
    * out if this is not possible.  Finally, set up vmcmds for the
    * text, data, bss, and stack segments.
    */
   int
   sunos_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp)
   {
           struct exec *execp = epp->ep_hdr;
           int error;
   
           epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC);
           epp->ep_tsize = execp->a_text;
           epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC);
           epp->ep_dsize = execp->a_data + execp->a_bss;
           epp->ep_entry = execp->a_entry;
   
           error = vn_marktext(epp->ep_vp);
           if (error)
                   return (error);
   
           /* set up command for text segment */
           NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
               epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC),
               VM_PROT_READ|VM_PROT_EXECUTE);
   
           /* set up command for data segment */
           NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
               epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC),
               VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
   
           /* set up command for bss segment */
           if (execp->a_bss)
                   NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
                       epp->ep_daddr + execp->a_data, NULLVP, 0,
                       VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
   
           return (*epp->ep_esch->es_setup_stack)(l, epp);
   }
   
   /*
    * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
    */
   int
   sunos_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp)
   {
           struct exec *execp = epp->ep_hdr;
           long bsize, baddr;
   
           epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC);
           epp->ep_tsize = execp->a_text;
           epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC);
           epp->ep_dsize = execp->a_data + execp->a_bss;
           epp->ep_entry = execp->a_entry;
   
           /* set up command for text segment */
           NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
               epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC),
               VM_PROT_READ|VM_PROT_EXECUTE);
   
           /* set up command for data segment */
           NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
               epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC),
               VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
   
           /* set up command for bss segment */
           baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
           bsize = epp->ep_daddr + epp->ep_dsize - baddr;
           if (bsize > 0)
                   NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
                       NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
   
           return (*epp->ep_esch->es_setup_stack)(l, epp);
   }
   
   /*
    * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
    */
   int
   sunos_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp)
   {
           struct exec *execp = epp->ep_hdr;
           long bsize, baddr;
   
           epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC);
           epp->ep_tsize = execp->a_text;
           epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC);
           epp->ep_dsize = execp->a_data + execp->a_bss;
           epp->ep_entry = execp->a_entry;
   
           /* set up command for text and data segments */
           NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
               execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
               SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
   
           /* set up command for bss segment */
           baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
           bsize = epp->ep_daddr + epp->ep_dsize - baddr;
           if (bsize > 0)
                   NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
                       NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
   
           return (*epp->ep_esch->es_setup_stack)(l, epp);
   }
   #endif /* !sparc */

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