/*      $NetBSD: netbsd32_exec_elf32.c,v 1.45 2019/06/07 23:35:53 christos Exp $        */
/*      from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */

/*
* Copyright (c) 1998, 2001 Matthew R. Green.
* 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.
*
* 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.
*/

/*
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by Christopher G. Demetriou.
* 4. 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: netbsd32_exec_elf32.c,v 1.45 2019/06/07 23:35:53 christos Exp $");

#define ELFSIZE         32

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/resourcevar.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/kauth.h>
#include <sys/namei.h>
#include <sys/compat_stub.h>

#include <compat/common/compat_util.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_exec.h>

#include <machine/netbsd32_machdep.h>

int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp,
                                     void *eh, char *itp, vaddr_t *pos);
extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *,
                                     Elf_Ehdr *);

int
ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp,
                        void *eh, char *itp, vaddr_t *pos)
{
       int error;

       if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0)
               return error;

#ifdef ELF_MD_PROBE_FUNC
       if ((error = ELF_MD_PROBE_FUNC(l, epp, eh, itp, pos)) != 0)
               return error;
#elif defined(ELF_INTERP_NON_RELOCATABLE)
       *pos = ELF_LINK_ADDR;
#endif

       return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos);
}

int
ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp,
                                 void *eh, char *itp, vaddr_t *pos)
{
       const char *m;

       if (itp && epp->ep_interp == NULL) {
               MODULE_HOOK_CALL(netbsd32_machine32_hook, (), machine, m);
               (void)compat_elf_check_interp(epp, itp, m);
       }
#ifdef _LP64
       epp->ep_flags |= EXEC_32 | EXEC_FORCEAUX;
#endif
       epp->ep_vm_minaddr = exec_vm_minaddr(VM_MIN_ADDRESS);
       epp->ep_vm_maxaddr = USRSTACK32;
#ifdef ELF_INTERP_NON_RELOCATABLE
       *pos = ELF_LINK_ADDR;
#endif
       return 0;
}

/*
* Copy arguments onto the stack in the normal way, but add some
* extra information in case of dynamic binding.
*/
int
netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack,
   struct ps_strings *arginfo, char **stackp, void *argp)
{
       int error;

       if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
               return error;

       return elf32_populate_auxv(l, pack, stackp);
}