f489acaf0f
copies arguments into the kernel space and one that operates completely in the kernel space; o use kernel-only version of execve(2) to kill another stackgap in linuxlator/i386. Obtained from: DragonFlyBSD (partially) MFC after: 2 weeks
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*-
|
|
* Copyright (c) 1995 Steven Wallace
|
|
* 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 Steven Wallace.
|
|
* 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/imgact.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/module.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sx.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_param.h>
|
|
|
|
#include <i386/ibcs2/ibcs2_syscall.h>
|
|
#include <i386/ibcs2/ibcs2_signal.h>
|
|
|
|
MODULE_VERSION(ibcs2, 1);
|
|
|
|
extern int bsd_to_ibcs2_errno[];
|
|
extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
|
|
extern int szsigcode;
|
|
extern char sigcode[];
|
|
static int ibcs2_fixup(register_t **, struct image_params *);
|
|
|
|
struct sysentvec ibcs2_svr3_sysvec = {
|
|
sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
|
|
ibcs2_sysent,
|
|
0xFF,
|
|
IBCS2_SIGTBLSZ,
|
|
bsd_to_ibcs2_sig,
|
|
ELAST + 1,
|
|
bsd_to_ibcs2_errno,
|
|
NULL, /* trap-to-signal translation function */
|
|
ibcs2_fixup, /* fixup */
|
|
sendsig,
|
|
sigcode, /* use generic trampoline */
|
|
&szsigcode, /* use generic trampoline size */
|
|
NULL, /* prepsyscall */
|
|
"IBCS2 COFF",
|
|
NULL, /* we don't have a COFF coredump function */
|
|
NULL,
|
|
IBCS2_MINSIGSTKSZ,
|
|
PAGE_SIZE,
|
|
VM_MIN_ADDRESS,
|
|
VM_MAXUSER_ADDRESS,
|
|
USRSTACK,
|
|
PS_STRINGS,
|
|
VM_PROT_ALL,
|
|
exec_copyout_strings,
|
|
exec_setregs,
|
|
NULL
|
|
};
|
|
|
|
static int
|
|
ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
|
|
{
|
|
|
|
return (suword(--(*stack_base), imgp->args->argc));
|
|
}
|
|
|
|
/*
|
|
* Create an "ibcs2" module that does nothing but allow checking for
|
|
* the presence of the subsystem.
|
|
*/
|
|
static int
|
|
ibcs2_modevent(module_t mod, int type, void *unused)
|
|
{
|
|
struct proc *p = NULL;
|
|
int rval = 0;
|
|
|
|
switch(type) {
|
|
case MOD_UNLOAD:
|
|
/* if this was an ELF module we'd use elf_brand_inuse()... */
|
|
sx_slock(&allproc_lock);
|
|
LIST_FOREACH(p, &allproc, p_list) {
|
|
if (p->p_sysent == &ibcs2_svr3_sysvec) {
|
|
rval = EBUSY;
|
|
break;
|
|
}
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
default:
|
|
return (EOPNOTSUPP);
|
|
break;
|
|
}
|
|
return (rval);
|
|
}
|
|
static moduledata_t ibcs2_mod = {
|
|
"ibcs2",
|
|
ibcs2_modevent,
|
|
0
|
|
};
|
|
DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
|