83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
/* $NetBSD: freebsd_exec_elf32.c,v 1.21 2017/08/08 08:04:06 maxv Exp $ */
|
|
|
|
/*
|
|
* 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: freebsd_exec_elf32.c,v 1.21 2017/08/08 08:04:06 maxv Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/exec.h>
|
|
#ifndef ELFSIZE
|
|
# define ELFSIZE 32
|
|
#endif /* !ELFSIZE */
|
|
#include <sys/exec_elf.h>
|
|
|
|
#include <compat/freebsd/freebsd_exec.h>
|
|
#include <compat/common/compat_util.h>
|
|
|
|
#include <compat/freebsd/freebsd_machdep.h>
|
|
|
|
int
|
|
ELFNAME2(freebsd,probe)(struct lwp *l, struct exec_package *epp, void *veh,
|
|
char *itp, vaddr_t *pos)
|
|
{
|
|
int error;
|
|
Elf_Ehdr *eh = (Elf_Ehdr *) veh;
|
|
static const char wantBrand[] = FREEBSD_ELF_BRAND_STRING;
|
|
static const char wantInterp[] = FREEBSD_ELF_INTERP_PREFIX_STRING;
|
|
|
|
/*
|
|
* Insist that the executable have a brand, and that it be "FreeBSD".
|
|
* Newer FreeBSD binaries have OSABI set to ELFOSABI_FREEBSD. This
|
|
* is arguably broken, but they seem to think they need it, for
|
|
* whatever reason.
|
|
*/
|
|
#ifndef EI_BRAND
|
|
#define EI_BRAND 8
|
|
#endif
|
|
if ((eh->e_ident[EI_BRAND] == '\0' ||
|
|
strcmp(&eh->e_ident[EI_BRAND], wantBrand) != 0) &&
|
|
eh->e_ident[EI_OSABI] != ELFOSABI_FREEBSD)
|
|
return ENOEXEC;
|
|
|
|
if (itp) {
|
|
if (strncmp(itp, wantInterp, sizeof(wantInterp) - 1))
|
|
return ENOEXEC;
|
|
if ((error = emul_find_interp(l, epp, itp)))
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|