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/* $OpenBSD: freebsd_exec.c,v 1.17 2006/01/19 17:54:50 mickey Exp $ */
/* $NetBSD: freebsd_exec.c,v 1.2 1996/05/18 16:02:08 christos 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/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/exec.h>
#include <sys/resourcevar.h>
#include <uvm/uvm_extern.h>
#include <sys/exec_elf.h>
#include <sys/exec_olf.h>
#include <machine/freebsd_machdep.h>
#include <compat/freebsd/freebsd_syscall.h>
#include <compat/freebsd/freebsd_exec.h>
#include <compat/freebsd/freebsd_util.h>
extern struct sysent freebsd_sysent[];
#ifdef SYSCALL_DEBUG
extern char *freebsd_syscallnames[];
#endif
extern const char freebsd_emul_path[];
struct emul emul_freebsd_aout = {
"freebsd",
NULL,
freebsd_sendsig,
FREEBSD_SYS_syscall,
FREEBSD_SYS_MAXSYSCALL,
freebsd_sysent,
#ifdef SYSCALL_DEBUG
freebsd_syscallnames,
#else
NULL,
#endif
0,
copyargs,
setregs,
NULL,
freebsd_sigcode,
freebsd_esigcode,
};
struct emul emul_freebsd_elf = {
"freebsd",
NULL,
freebsd_sendsig,
FREEBSD_SYS_syscall,
FREEBSD_SYS_MAXSYSCALL,
freebsd_sysent,
#ifdef SYSCALL_DEBUG
freebsd_syscallnames,
#else
NULL,
#endif
FREEBSD_ELF_AUX_ARGSIZ,
elf32_copyargs,
setregs,
exec_elf32_fixup,
freebsd_sigcode,
freebsd_esigcode,
};
/*
* exec_aout_makecmds(): Check if it's an a.out-format executable.
*
* Given a proc pointer and an exec package pointer, see if the referent
* of the epp is in a.out format. First check 'standard' magic numbers for
* this architecture. If that fails, try a cpu-dependent hook.
*
* This function, in the former case, or the hook, in the latter, is
* responsible for creating a set of vmcmds which can be used to build
* the process's vm space and inserting them into the exec package.
*/
int
exec_freebsd_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
u_long midmag;
int error = ENOEXEC;
struct exec *execp = epp->ep_hdr;
if (epp->ep_hdrvalid < sizeof(struct exec))
return ENOEXEC;
midmag = FREEBSD_N_GETMID(*execp) << 16 | FREEBSD_N_GETMAGIC(*execp);
/* assume FreeBSD's MID_MACHINE and [ZQNO]MAGIC is same as NetBSD's */
switch (midmag) {
case (MID_MACHINE << 16) | ZMAGIC:
error = exec_aout_prep_oldzmagic(p, epp);
break;
case (MID_MACHINE << 16) | QMAGIC:
error = exec_aout_prep_zmagic(p, epp);
break;
case (MID_MACHINE << 16) | NMAGIC:
error = exec_aout_prep_nmagic(p, epp);
break;
case (MID_MACHINE << 16) | OMAGIC:
error = exec_aout_prep_omagic(p, epp);
break;
}
if (error == 0)
epp->ep_emul = &emul_freebsd_aout;
else
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
int
exec_freebsd_elf32_makecmds(struct proc *p, struct exec_package *epp)
{
if (!(emul_freebsd_elf.e_flags & EMUL_ENABLED))
return (ENOEXEC);
return exec_elf32_makecmds(p, epp);
}
int
freebsd_elf_probe(p, epp, itp, pos, os)
struct proc *p;
struct exec_package *epp;
char *itp;
u_long *pos;
u_int8_t *os;
{
Elf32_Ehdr *eh = epp->ep_hdr;
char *bp, *brand;
int error;
size_t len;
/*
* Older FreeBSD ELF binaries use a brand; newer ones use EI_OSABI
*/
if (eh->e_ident[EI_OSABI] != ELFOSABI_FREEBSD) {
brand = elf32_check_brand(eh);
if (brand == NULL || strcmp(brand, "FreeBSD") != 0)
return (EINVAL);
}
if (itp) {
if ((error = emul_find(p, NULL, freebsd_emul_path, itp, &bp, 0)))
return (error);
if ((error = copystr(bp, itp, MAXPATHLEN, &len)))
return (error);
free(bp, M_TEMP);
}
epp->ep_emul = &emul_freebsd_elf;
*pos = ELF32_NO_ADDR;
if (*os == OOS_NULL)
*os = OOS_FREEBSD;
return (0);
}
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