203 lines
5.9 KiB
C
203 lines
5.9 KiB
C
/* $NetBSD: linux_exec.c,v 1.62 2003/03/01 04:36:39 thorpej Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1994, 1995, 1998, 2000 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christos Zoulas, Frank van der Linden, Eric Haszlakiewicz and
|
|
* Thor Lancelot Simon.
|
|
*
|
|
* 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 the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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: linux_exec.c,v 1.62 2003/03/01 04:36:39 thorpej Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/exec_elf.h>
|
|
|
|
#include <sys/mman.h>
|
|
#include <sys/sa.h>
|
|
#include <sys/syscallargs.h>
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/reg.h>
|
|
|
|
#include <compat/linux/common/linux_types.h>
|
|
#include <compat/linux/common/linux_signal.h>
|
|
#include <compat/linux/common/linux_util.h>
|
|
#include <compat/linux/common/linux_exec.h>
|
|
#include <compat/linux/common/linux_machdep.h>
|
|
|
|
#include <compat/linux/linux_syscallargs.h>
|
|
#include <compat/linux/linux_syscall.h>
|
|
#include <compat/linux/common/linux_misc.h>
|
|
#include <compat/linux/common/linux_errno.h>
|
|
#include <compat/linux/common/linux_emuldata.h>
|
|
|
|
extern struct sysent linux_sysent[];
|
|
extern const char * const linux_syscallnames[];
|
|
extern char linux_sigcode[], linux_esigcode[];
|
|
|
|
static void linux_e_proc_exec __P((struct proc *, struct exec_package *));
|
|
static void linux_e_proc_fork __P((struct proc *, struct proc *));
|
|
static void linux_e_proc_exit __P((struct proc *));
|
|
static void linux_e_proc_init __P((struct proc *, struct vmspace *));
|
|
|
|
/*
|
|
* Execve(2). Just check the alternate emulation path, and pass it on
|
|
* to the NetBSD execve().
|
|
*/
|
|
int
|
|
linux_sys_execve(l, v, retval)
|
|
struct lwp *l;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_execve_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(char **) argv;
|
|
syscallarg(char **) envp;
|
|
} */ *uap = v;
|
|
struct proc *p = l->l_proc;
|
|
struct sys_execve_args ap;
|
|
caddr_t sg;
|
|
|
|
sg = stackgap_init(p, 0);
|
|
CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
|
|
|
|
SCARG(&ap, path) = SCARG(uap, path);
|
|
SCARG(&ap, argp) = SCARG(uap, argp);
|
|
SCARG(&ap, envp) = SCARG(uap, envp);
|
|
|
|
return sys_execve(l, &ap, retval);
|
|
}
|
|
|
|
/*
|
|
* Emulation switch.
|
|
*/
|
|
const struct emul emul_linux = {
|
|
"linux",
|
|
"/emul/linux",
|
|
#ifndef __HAVE_MINIMAL_EMUL
|
|
0,
|
|
(int*)native_to_linux_errno,
|
|
LINUX_SYS_syscall,
|
|
LINUX_SYS_NSYSENT,
|
|
#endif
|
|
linux_sysent,
|
|
linux_syscallnames,
|
|
linux_sendsig,
|
|
linux_trapsignal,
|
|
linux_sigcode,
|
|
linux_esigcode,
|
|
linux_setregs,
|
|
linux_e_proc_exec,
|
|
linux_e_proc_fork,
|
|
linux_e_proc_exit,
|
|
#ifdef __HAVE_SYSCALL_INTERN
|
|
linux_syscall_intern,
|
|
#else
|
|
#error Implement __HAVE_SYSCALL_INTERN for this platform
|
|
#endif
|
|
linux_sysctl,
|
|
NULL,
|
|
};
|
|
|
|
static void
|
|
linux_e_proc_init(p, vmspace)
|
|
struct proc *p;
|
|
struct vmspace *vmspace;
|
|
{
|
|
if (!p->p_emuldata) {
|
|
/* allocate new Linux emuldata */
|
|
MALLOC(p->p_emuldata, void *, sizeof(struct linux_emuldata),
|
|
M_EMULDATA, M_WAITOK);
|
|
}
|
|
|
|
memset(p->p_emuldata, '\0', sizeof(struct linux_emuldata));
|
|
|
|
/* Set the process idea of the break to the real value */
|
|
((struct linux_emuldata*)(p->p_emuldata))->p_break =
|
|
vmspace->vm_daddr + ctob(vmspace->vm_dsize);
|
|
}
|
|
|
|
/*
|
|
* Allocate per-process structures. Called when executing Linux
|
|
* process. We can reuse the old emuldata - if it's not null,
|
|
* the executed process is of same emulation as original forked one.
|
|
*/
|
|
static void
|
|
linux_e_proc_exec(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
/* exec, use our vmspace */
|
|
linux_e_proc_init(p, p->p_vmspace);
|
|
}
|
|
|
|
/*
|
|
* Emulation per-process exit hook.
|
|
*/
|
|
static void
|
|
linux_e_proc_exit(p)
|
|
struct proc *p;
|
|
{
|
|
/* free Linux emuldata and set the pointer to null */
|
|
FREE(p->p_emuldata, M_EMULDATA);
|
|
p->p_emuldata = NULL;
|
|
}
|
|
|
|
/*
|
|
* Emulation fork hook.
|
|
*/
|
|
static void
|
|
linux_e_proc_fork(p, parent)
|
|
struct proc *p, *parent;
|
|
{
|
|
/*
|
|
* It could be desirable to copy some stuff from parent's
|
|
* emuldata. We don't need anything like that for now.
|
|
* So just allocate new emuldata for the new process.
|
|
*/
|
|
p->p_emuldata = NULL;
|
|
|
|
/* fork, use parent's vmspace (our vmspace may not be setup yet) */
|
|
linux_e_proc_init(p, parent->p_vmspace);
|
|
}
|