First incarnation of our Linux emulator or rather compatibility code.

This first shot only incorporaties so much functionality that DOOM
can run (the X version), signal handling is VERY weak, so is many
other things. But it meets my milestone number one (you guessed it
- running DOOM).

Uses /compat/linux as prefix for loading shared libs, so it won't
conflict with our own libs.

Kernel must be compiled with "options COMPAT_LINUX" for this to work.

26 files changed, 8243 insertions, 2 deletions

diff --git a/sys/alpha/linux/linux.h b/sys/alpha/linux/linux.h
new file mode 100644
index 0000000..9d13bd1
--- /dev/null
+++ b/sys/alpha/linux/linux.h
@@ -0,0 +1,406 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *	$Id: linux.h,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#ifndef LINUX_H
+#define LINUX_H
+
+typedef unsigned short linux_uid_t;
+typedef unsigned short linux_gid_t;
+typedef unsigned short linux_dev_t;
+typedef unsigned long linux_ino_t;
+typedef unsigned short linux_mode_t;
+typedef unsigned short linux_nlink_t;
+typedef long linux_time_t;
+typedef long linux_clock_t;
+typedef char * linux_caddr_t;
+typedef long linux_off_t;
+typedef struct {
+	long val[2];
+} linux_fsid_t;
+typedef int linux_pid_t;
+typedef unsigned long linux_sigset_t;
+typedef void (*linux_handler_t)(int);
+typedef struct {
+	void (*sa_handler)(int);
+	linux_sigset_t sa_mask;
+	unsigned long sa_flags;
+	void (*sa_restorer)(void);
+} linux_sigaction_t;
+typedef int linux_key_t;
+
+extern int bsd_to_linux_signal[];
+extern int linux_to_bsd_signal[];
+
+/* misc defines */
+#define LINUX_NAME_MAX		255
+
+/* signal numbers */
+#define LINUX_SIGHUP		 1
+#define LINUX_SIGINT		 2
+#define LINUX_SIGQUIT		 3
+#define LINUX_SIGILL		 4
+#define LINUX_SIGTRAP		 5
+#define LINUX_SIGABRT		 6
+#define LINUX_SIGIOT		 6
+#define LINUX_SIGUNUSED	 	 7
+#define LINUX_SIGFPE		 8
+#define LINUX_SIGKILL		 9
+#define LINUX_SIGUSR1		10
+#define LINUX_SIGSEGV		11
+#define LINUX_SIGUSR2		12
+#define LINUX_SIGPIPE		13
+#define LINUX_SIGALRM		14
+#define LINUX_SIGTERM		15
+#define LINUX_SIGSTKFLT		16
+#define LINUX_SIGCHLD		17
+#define LINUX_SIGCONT		18
+#define LINUX_SIGSTOP		19
+#define LINUX_SIGTSTP		20
+#define LINUX_SIGTTIN		21
+#define LINUX_SIGTTOU		22
+#define LINUX_SIGIO		23
+#define LINUX_SIGPOLL		LINUX_SIGIO
+#define LINUX_SIGURG		LINUX_SIGIO
+#define LINUX_SIGXCPU		24
+#define LINUX_SIGXFSZ		25
+#define LINUX_SIGVTALRM		26
+#define LINUX_SIGPROF		27
+#define LINUX_SIGWINCH		28
+#define LINUX_SIGLOST		29
+#define LINUX_SIGPWR		30
+#define LINUX_SIGBUS		LINUX_SIGUNUSED
+#define LINUX_NSIG		32
+
+/* sigaction flags */
+#define LINUX_SA_NOCLDSTOP	0x00000001
+#define LINUX_SA_ONSTACK	0x08000000
+#define LINUX_SA_RESTART	0x10000000
+#define LINUX_SA_INTERRUPT	0x20000000
+#define LINUX_SA_NOMASK		0x40000000
+#define LINUX_SA_ONESHOT	0x80000000
+
+/* sigprocmask actions */
+#define LINUX_SIG_BLOCK		0
+#define LINUX_SIG_UNBLOCK	1
+#define LINUX_SIG_SETMASK	2
+
+/* termio commands */
+#define LINUX_TCGETS		0x5401
+#define LINUX_TCSETS		0x5402
+#define LINUX_TCSETSW		0x5403
+#define LINUX_TCSETSF		0x5404
+#define LINUX_TCGETA		0x5405
+#define LINUX_TCSETA		0x5406
+#define LINUX_TCSETAW		0x5407
+#define LINUX_TCSETAF		0x5408
+#define LINUX_TCSBRK		0x5409
+#define LINUX_TCXONC		0x540A
+#define LINUX_TCFLSH		0x540B
+#define LINUX_TIOCEXCL		0x540C
+#define LINUX_TIOCNXCL		0x540D
+#define LINUX_TIOCSCTTY		0x540E
+#define LINUX_TIOCGPGRP		0x540F
+#define LINUX_TIOCSPGRP		0x5410
+#define LINUX_TIOCOUTQ		0x5411
+#define LINUX_TIOCSTI		0x5412
+#define LINUX_TIOCGWINSZ	0x5413
+#define LINUX_TIOCSWINSZ	0x5414
+#define LINUX_TIOCMGET		0x5415
+#define LINUX_TIOCMBIS		0x5416
+#define LINUX_TIOCMBIC		0x5417
+#define LINUX_TIOCMSET		0x5418
+#define LINUX_TIOCGSOFTCAR	0x5419
+#define LINUX_TIOCSSOFTCAR	0x541A
+#define LINUX_FIONREAD		0x541B
+#define LINUX_TIOCINQ		FIONREAD
+#define LINUX_TIOCLINUX		0x541C
+#define LINUX_TIOCCONS		0x541D
+#define LINUX_TIOCGSERIAL	0x541E
+#define LINUX_TIOCSSERIAL	0x541F
+#define LINUX_TIOCPKT		0x5420
+#define LINUX_FIONBIO		0x5421
+#define LINUX_TIOCNOTTY		0x5422
+#define LINUX_TIOCSETD		0x5423
+#define LINUX_TIOCGETD		0x5424
+#define LINUX_TCSBRKP		0x5425
+#define LINUX_TIOCTTYGSTRUCT	0x5426
+#define LINUX_FIONCLEX		0x5450
+#define LINUX_FIOCLEX		0x5451
+#define LINUX_FIOASYNC		0x5452
+#define LINUX_TIOCSERCONFIG	0x5453
+#define LINUX_TIOCSERGWILD	0x5454
+#define LINUX_TIOCSERSWILD	0x5455
+#define LINUX_TIOCGLCKTRMIOS	0x5456
+#define LINUX_TIOCSLCKTRMIOS	0x5457
+
+/* line disciplines */
+#define LINUX_N_TTY		0
+#define LINUX_N_SLIP		1
+#define LINUX_N_MOUSE		2
+#define LINUX_N_PPP		3
+
+/* Linux termio c_cc values */
+#define LINUX_VINTR		0
+#define LINUX_VQUIT		1
+#define LINUX_VERASE		2
+#define LINUX_VKILL		3
+#define LINUX_VEOF		4
+#define LINUX_VTIME		5
+#define LINUX_VMIN		6
+#define LINUX_VSWTC		7
+#define LINUX_NCC		8
+
+/* Linux termios c_cc values */
+#define LINUX_VSTART		8
+#define LINUX_VSTOP		9
+#define LINUX_VSUSP 		10
+#define LINUX_VEOL		11
+#define LINUX_VREPRINT		12
+#define LINUX_VDISCARD		13
+#define LINUX_VWERASE		14
+#define LINUX_VLNEXT		15
+#define LINUX_VEOL2		16
+#define LINUX_NCCS		17
+
+/* Linux c_iflag masks */
+#define LINUX_IGNBRK		0x0000001
+#define LINUX_BRKINT		0x0000002
+#define LINUX_IGNPAR		0x0000004
+#define LINUX_PARMRK		0x0000008
+#define LINUX_INPCK		0x0000010
+#define LINUX_ISTRIP		0x0000020
+#define LINUX_INLCR		0x0000040
+#define LINUX_IGNCR		0x0000080
+#define LINUX_ICRNL		0x0000100
+#define LINUX_IUCLC		0x0000200
+#define LINUX_IXON		0x0000400
+#define LINUX_IXANY		0x0000800
+#define LINUX_IXOFF		0x0001000
+#define LINUX_IMAXBEL		0x0002000
+
+/* Linux c_oflag masks */
+#define LINUX_OPOST		0x0000001
+#define LINUX_OLCUC		0x0000002
+#define LINUX_ONLCR		0x0000004
+#define LINUX_OCRNL		0x0000008
+#define LINUX_ONOCR		0x0000010
+#define LINUX_ONLRET		0x0000020
+#define LINUX_OFILL		0x0000040
+#define LINUX_OFDEL		0x0000080
+#define LINUX_NLDLY		0x0000100
+
+#define LINUX_NL0		0x0000000
+#define LINUX_NL1		0x0000100
+#define LINUX_CRDLY		0x0000600
+#define LINUX_CR0		0x0000000
+#define LINUX_CR1		0x0000200
+#define LINUX_CR2		0x0000400
+#define LINUX_CR3		0x0000600
+#define LINUX_TABDLY		0x0001800
+#define LINUX_TAB0		0x0000000
+#define LINUX_TAB1		0x0000800
+#define LINUX_TAB2		0x0001000
+#define LINUX_TAB3		0x0001800
+#define LINUX_XTABS		0x0001800
+#define LINUX_BSDLY		0x0002000
+#define LINUX_BS0		0x0000000
+#define LINUX_BS1		0x0002000
+#define LINUX_VTDLY		0x0004000
+#define LINUX_VT0		0x0000000
+#define LINUX_VT1		0x0004000
+#define LINUX_FFDLY		0x0008000
+#define LINUX_FF0		0x0000000
+#define LINUX_FF1		0x0008000
+
+#define LINUX_CBAUD		0x0000100f
+#define LINUX_B0		0x00000000
+#define LINUX_B50		0x00000001
+#define LINUX_B75		0x00000002
+#define LINUX_B110		0x00000003
+#define LINUX_B134		0x00000004
+#define LINUX_B150		0x00000005
+#define LINUX_B200		0x00000006
+#define LINUX_B300		0x00000007
+#define LINUX_B600		0x00000008
+#define LINUX_B1200		0x00000009
+#define LINUX_B1800		0x0000000a
+#define LINUX_B2400		0x0000000b
+#define LINUX_B4800		0x0000000c
+#define LINUX_B9600		0x0000000d
+#define LINUX_B19200		0x0000000e
+#define LINUX_B38400		0x0000000f
+#define LINUX_EXTA		LINUX_B19200
+#define LINUX_EXTB		LINUX_B38400
+#define LINUX_CBAUDEX		0x00001000
+#define LINUX_B57600		0x00001001
+#define LINUX_B115200		0x00001002
+
+#define LINUX_CSIZE		0x00000030
+#define LINUX_CS5		0x00000000
+#define LINUX_CS6		0x00000010
+#define LINUX_CS7		0x00000020
+#define LINUX_CS8		0x00000030
+#define LINUX_CSTOPB		0x00000040
+#define LINUX_CREAD		0x00000080
+#define LINUX_PARENB		0x00000100
+#define LINUX_PARODD		0x00000200
+#define LINUX_HUPCL		0x00000400
+#define LINUX_CLOCAL		0x00000800
+#define LINUX_CRTSCTS		0x80000000
+
+/* Linux c_lflag masks */
+#define LINUX_ISIG		0x00000001
+#define LINUX_ICANON		0x00000002
+#define LINUX_XCASE		0x00000004
+#define LINUX_ECHO		0x00000008
+#define LINUX_ECHOE		0x00000010
+#define LINUX_ECHOK		0x00000020
+#define LINUX_ECHONL		0x00000040
+#define LINUX_NOFLSH		0x00000080
+#define LINUX_TOSTOP		0x00000100
+#define LINUX_ECHOCTL		0x00000200
+#define LINUX_ECHOPRT		0x00000400
+#define LINUX_ECHOKE		0x00000800
+#define LINUX_FLUSHO		0x00001000
+#define LINUX_PENDIN		0x00002000
+#define LINUX_IEXTEN		0x00008000
+
+/* open/fcntl flags */
+#define LINUX_O_RDONLY		00
+#define LINUX_O_WRONLY		01
+#define LINUX_O_RDWR		02
+#define LINUX_O_CREAT		0100
+#define LINUX_O_EXCL		0200
+#define LINUX_O_NOCTTY		0400
+#define LINUX_O_TRUNC		01000
+#define LINUX_O_APPEND		02000
+#define LINUX_O_NONBLOCK	04000
+#define LINUX_O_NDELAY		LINUX_O_NONBLOCK
+#define LINUX_O_SYNC		010000
+#define LINUX_FASYNC		020000
+
+/* fcntl flags */
+#define LINUX_F_DUPFD		0
+#define LINUX_F_GETFD		1
+#define LINUX_F_SETFD		2
+#define LINUX_F_GETFL		3
+#define LINUX_F_SETFL		4
+#define LINUX_F_GETLK		5
+#define LINUX_F_SETLK		6
+#define LINUX_F_SETLKW		7
+#define LINUX_F_SETOWN		8
+#define LINUX_F_GETOWN		9
+
+#define LINUX_F_RDLCK		0
+#define LINUX_F_WRLCK		1
+#define LINUX_F_UNLCK		2
+
+/* mmap options */
+#define LINUX_MAP_SHARED	0x0001
+#define LINUX_MAP_PRIVATE	0x0002
+#define LINUX_MAP_FIXED		0x0010
+#define LINUX_MAP_ANON		0x0020
+
+/* SystemV ipc defines */
+#define LINUX_SEMOP		1
+#define LINUX_SEMGET		2
+#define LINUX_SEMCTL		3
+#define LINUX_MSGSND		11
+#define LINUX_MSGRCV		12
+#define LINUX_MSGGET		13
+#define LINUX_MSGCTL		14
+#define LINUX_SHMAT		21
+#define LINUX_SHMDT		22
+#define LINUX_SHMGET		23
+#define LINUX_SHMCTL		24
+
+#define LINUX_IPC_RMID		0
+#define LINUX_IPC_SET		1
+#define LINUX_IPC_STAT		2
+#define LINUX_IPC_INFO		3
+
+#define LINUX_SHM_LOCK		11
+#define LINUX_SHM_UNLOCK	12
+#define LINUX_SHM_STAT		13
+#define LINUX_SHM_INFO		14
+
+#define LINUX_SHM_RDONLY	0x1000
+#define LINUX_SHM_RND		0x2000
+#define LINUX_SHM_REMAP		0x4000
+
+/* Socket defines */
+#define LINUX_SOCKET 		1
+#define LINUX_BIND		2
+#define LINUX_CONNECT 		3
+#define LINUX_LISTEN 		4
+#define LINUX_ACCEPT 		5
+#define LINUX_GETSOCKNAME	6
+#define LINUX_GETPEERNAME	7
+#define LINUX_SOCKETPAIR	8
+#define LINUX_SEND		9
+#define LINUX_RECV		10
+#define LINUX_SENDTO 		11
+#define LINUX_RECVFROM 		12
+#define LINUX_SHUTDOWN 		13
+#define LINUX_SETSOCKOPT	14
+#define LINUX_GETSOCKOPT	15
+
+#define LINUX_AF_UNSPEC		0
+#define LINUX_AF_UNIX		1
+#define LINUX_AF_INET		2
+#define LINUX_AF_AX25		3
+#define LINUX_AF_IPX		4
+#define LINUX_AF_APPLETALK	5
+
+#define LINUX_SOL_SOCKET	1
+#define LINUX_SOL_IP		0
+#define LINUX_SOL_IPX		256
+#define LINUX_SOL_AX25		257
+#define LINUX_SOL_TCP		6
+#define LINUX_SOL_UDP		17
+
+#define LINUX_SO_DEBUG		1
+#define LINUX_SO_REUSEADDR	2
+#define LINUX_SO_TYPE		3
+#define LINUX_SO_ERROR		4
+#define LINUX_SO_DONTROUTE	5
+#define LINUX_SO_BROADCAST	6
+#define LINUX_SO_SNDBUF		7
+#define LINUX_SO_RCVBUF		8
+#define LINUX_SO_KEEPALIVE	9
+#define LINUX_SO_OOBINLINE	10
+#define LINUX_SO_NO_CHECK	11
+#define LINUX_SO_PRIORITY	12
+#define LINUX_SO_LINGER		13
+
+#define LINUX_IP_TOS		1
+#define LINUX_IP_TTL		2
+
+#endif /* LINUX_H */
diff --git a/sys/alpha/linux/linux_dummy.c b/sys/alpha/linux/linux_dummy.c
new file mode 100644
index 0000000..13288ac
--- /dev/null
+++ b/sys/alpha/linux/linux_dummy.c
@@ -0,0 +1,316 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_dummy.c,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/resourcevar.h>
+#include <sys/errno.h>
+#include <vm/vm.h>
+
+int
+linux_setup(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): setup() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_break(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): break() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_stat(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): stat() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_fstat(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): fstat() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_mount(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): mount() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_umount(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): umount() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_stime(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): stime() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ptrace(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ptrace() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_pause(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): pause() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_stty(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): stty() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_gtty(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): gtty() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_nice(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): nice() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ftime(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ftime() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_prof(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): prof() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_signal(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): signal() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_phys(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): phys() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_lock(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): lock() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_mpx(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): mpx() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ulimit(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ulimit() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_olduname(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): olduname() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ustat(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ustat() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ioperm(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ioperm() not supported\n", p->p_pid);
+    return 0; /* EINVAL SOS XXX */
+}
+
+int
+linux_syslog(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): syslog() not supported (BSD sigreturn)\n",p->p_pid);
+    return sigreturn(p, args, retval);
+}
+
+int
+linux_iopl(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): iopl() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_vhangup(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): vhangup() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_idle(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): idle() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_vm86(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): vm86() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_swapoff(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): swapoff() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_sysinfo(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): sysinfo() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_sigreturn(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): sigreturn() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_clone(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): clone() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_uname(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): uname() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_modify_ldt(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): modify_ldt() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_adjtimex(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): adjtimex() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_create_module(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): create_module() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_init_module(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): init_module() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_delete_module(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): delete_module() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_get_kernel_syms(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): get_kernel_syms() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_quotactl(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): quotactl() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_bdflush(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): bdflush() not supported\n", p->p_pid);
+    return ENOSYS;
+}
diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
new file mode 100644
index 0000000..b846068
--- /dev/null
+++ b/sys/compat/linux/linux_file.c
@@ -0,0 +1,436 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_file.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/exec.h>
+#include <sys/dirent.h>
+#include <vm/vm.h>
+#include <ufs/ufs/dir.h>
+
+
+struct linux_creat_args {
+    char    *path;
+    int mode;
+};
+
+int
+linux_creat(struct proc *p, struct linux_creat_args *args, int *retval)
+{
+    struct {
+	char *path;
+	int flags;
+	int mode;
+    } bsd_open_args;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): creat(%s, %d)\n", 
+	   p->p_pid, args->path, args->mode);
+#endif
+    bsd_open_args.path = args->path;
+    bsd_open_args.mode = args->mode;
+    bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
+    return open(p, &bsd_open_args, retval);
+}
+
+struct linux_open_args {
+    char *path;
+    int flags;
+    int mode;
+};
+
+int
+linux_open(struct proc *p, struct linux_open_args *args, int *retval)
+{
+    struct {
+	char *path;
+	int flags;
+	int mode;
+    } bsd_open_args;
+    int error;
+    
+#ifdef DEBUG
+    printf("Linux-emul(%d): open(%s, 0x%x, 0x%x)\n", 
+	   p->p_pid, args->path, args->flags, args->mode);
+#endif
+    bsd_open_args.flags = 0;
+    if (args->flags & LINUX_O_RDONLY)
+	bsd_open_args.flags |= O_RDONLY;
+    if (args->flags & LINUX_O_WRONLY) 
+	bsd_open_args.flags |= O_WRONLY;
+    if (args->flags & LINUX_O_RDWR)
+	bsd_open_args.flags |= O_RDWR;
+    if (args->flags & LINUX_O_NDELAY)
+	bsd_open_args.flags |= O_NONBLOCK;
+    if (args->flags & LINUX_O_APPEND)
+	bsd_open_args.flags |= O_APPEND;
+    if (args->flags & LINUX_O_SYNC)
+	bsd_open_args.flags |= O_FSYNC;
+    if (args->flags & LINUX_O_NONBLOCK)
+	bsd_open_args.flags |= O_NONBLOCK;
+    if (args->flags & LINUX_FASYNC)
+	bsd_open_args.flags |= O_ASYNC;
+    if (args->flags & LINUX_O_CREAT)
+	bsd_open_args.flags |= O_CREAT;
+    if (args->flags & LINUX_O_TRUNC)
+	bsd_open_args.flags |= O_TRUNC;
+    if (args->flags & LINUX_O_EXCL)
+	bsd_open_args.flags |= O_EXCL;
+    if (args->flags & LINUX_O_NOCTTY)
+	bsd_open_args.flags |= O_NOCTTY;
+    bsd_open_args.path = args->path;
+    bsd_open_args.mode = args->mode;
+
+    error = open(p, &bsd_open_args, retval);
+    if (!error && !(bsd_open_args.flags & O_NOCTTY) && 
+	SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
+	struct filedesc *fdp = p->p_fd;
+	struct file *fp = fdp->fd_ofiles[*retval];
+
+	if (fp->f_type == DTYPE_VNODE)
+	    (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
+    }
+    return error;
+}
+
+struct linux_flock {
+    short l_type;
+    short l_whence;
+    linux_off_t l_start;
+    linux_off_t l_len;
+    linux_pid_t l_pid;
+};
+
+static void
+linux_to_bsd_flock(struct linux_flock *linux_flock, struct flock *bsd_flock)
+{
+    switch (linux_flock->l_type) {
+    case LINUX_F_RDLCK:
+	bsd_flock->l_type = F_RDLCK;
+	break;
+    case LINUX_F_WRLCK:
+	bsd_flock->l_type = F_WRLCK;
+	break;
+    case LINUX_F_UNLCK:
+	bsd_flock->l_type = F_UNLCK;
+	break;
+    }
+    bsd_flock->l_whence = linux_flock->l_whence;
+    bsd_flock->l_start = (off_t)linux_flock->l_start;
+    bsd_flock->l_len = (off_t)linux_flock->l_len;
+    bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
+}
+
+static void
+bsd_to_linux_flock(struct flock *bsd_flock, struct linux_flock *linux_flock)
+{
+    switch (bsd_flock->l_type) {
+    case F_RDLCK:
+	linux_flock->l_type = LINUX_F_RDLCK;
+	break;
+    case F_WRLCK:
+	linux_flock->l_type = LINUX_F_WRLCK;
+	break;
+    case F_UNLCK:
+	linux_flock->l_type = LINUX_F_UNLCK;
+	break;
+    }
+    linux_flock->l_whence = bsd_flock->l_whence;
+    linux_flock->l_start = (linux_off_t)bsd_flock->l_start;
+    linux_flock->l_len = (linux_off_t)bsd_flock->l_len;
+    linux_flock->l_pid = (linux_pid_t)bsd_flock->l_pid;
+}
+
+struct linux_fcntl_args {
+    int fd;
+    int cmd;
+    int arg;
+};
+
+int
+linux_fcntl(struct proc *p, struct linux_fcntl_args *args, int *retval)
+{
+    int error, result;
+    struct fcntl_args {
+	int fd;
+	int cmd;
+	int arg;
+    } fcntl_args; 
+    struct linux_flock linux_flock;
+    struct flock *bsd_flock = 
+	(struct flock *)ua_alloc_init(sizeof(struct flock));
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): fcntl(%d, %08x, *)\n",
+	   p->p_pid, args->fd, args->cmd);
+#endif
+    fcntl_args.fd = args->fd;
+    fcntl_args.arg = 0;
+
+    switch (args->cmd) {
+    case LINUX_F_DUPFD:
+	fcntl_args.cmd = F_DUPFD;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_GETFD:
+	fcntl_args.cmd = F_GETFD;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_SETFD:
+	fcntl_args.cmd = F_SETFD;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_GETFL:
+	fcntl_args.cmd = F_GETFL;
+	error = fcntl(p, &fcntl_args, &result);
+	*retval = 0;
+	if (result & O_RDONLY) *retval |= LINUX_O_RDONLY;
+	if (result & O_WRONLY) *retval |= LINUX_O_WRONLY;
+	if (result & O_RDWR) *retval |= LINUX_O_RDWR;
+	if (result & O_NDELAY) *retval |= LINUX_O_NONBLOCK;
+	if (result & O_APPEND) *retval |= LINUX_O_APPEND;
+	if (result & O_FSYNC) *retval |= LINUX_O_SYNC;
+	return error;
+
+    case LINUX_F_SETFL:
+	if (args->arg & LINUX_O_NDELAY) fcntl_args.arg |= O_NONBLOCK;
+	if (args->arg & LINUX_O_APPEND) fcntl_args.arg |= O_APPEND;
+	if (args->arg & LINUX_O_SYNC) fcntl_args.arg |= O_FSYNC;
+	fcntl_args.cmd = F_SETFL;
+	return fcntl(p, &fcntl_args, retval);
+    
+    case LINUX_F_GETLK:
+	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
+		   	    sizeof(struct linux_flock)))) 
+	    return error;
+	linux_to_bsd_flock(&linux_flock, bsd_flock);
+	fcntl_args.cmd = F_GETLK;
+	fcntl_args.arg = (int)bsd_flock;
+	if (error = fcntl(p, &fcntl_args, retval))
+	    return error;
+	bsd_to_linux_flock(bsd_flock, &linux_flock);
+	return copyout((caddr_t)&linux_flock, (caddr_t)args->arg,
+		       sizeof(struct linux_flock));
+
+    case LINUX_F_SETLK:
+	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
+		   	    sizeof(struct linux_flock)))) 
+	    return error;
+	linux_to_bsd_flock(&linux_flock, bsd_flock);
+	fcntl_args.cmd = F_SETLK;
+	fcntl_args.arg = (int)bsd_flock;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_SETLKW:
+	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
+		   	    sizeof(struct linux_flock)))) 
+	    return error;
+	linux_to_bsd_flock(&linux_flock, bsd_flock);
+	fcntl_args.cmd = F_SETLKW;
+	fcntl_args.arg = (int)bsd_flock;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_SETOWN:
+	fcntl_args.cmd = F_SETOWN;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_GETOWN:
+	fcntl_args.cmd = F_GETOWN;
+	return fcntl(p, &fcntl_args, retval);
+    }
+    return EINVAL;
+}
+
+struct linux_lseek_args {
+    int fdes;
+    unsigned long off;
+    int whence;
+};
+
+int
+linux_lseek(struct proc *p, struct linux_lseek_args *args, int *retval)
+{
+
+    struct lseek_args {
+	int fdes;
+	int pad;
+	off_t off;
+	int whence;
+    } tmp_args;
+    off_t tmp_retval;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): lseek(%d, %d, %d)\n",
+	   p->p_pid, args->fdes, args->off, args->whence);
+#endif
+    tmp_args.fdes = args->fdes;
+    tmp_args.off = (off_t)args->off;
+    tmp_args.whence = args->whence;
+    error = lseek(p, &tmp_args, &tmp_retval);
+    *retval = (int)tmp_retval;
+    return error;
+}
+
+struct linux_dirent {
+    long dino;
+    linux_off_t doff;
+    unsigned short dreclen;
+    char dname[LINUX_NAME_MAX + 1];
+};
+
+#define LINUX_RECLEN(de,namlen) \
+    ALIGN((((char *)&(de)->dname - (char *)de) + (namlen) + 1))
+
+struct linux_readdir_args {
+    int fd;
+    struct linux_dirent *dent;
+    unsigned int count;
+};
+
+int
+linux_readdir(struct proc *p, struct linux_readdir_args *args, int *retval)
+{
+    register struct dirent *bdp;
+    struct vnode *vp;
+    caddr_t inp, buf;		/* BSD-format */
+    int len, reclen;		/* BSD-format */
+    caddr_t outp;		/* Linux-format */
+    int resid, linuxreclen=0;	/* Linux-format */
+    struct file *fp;
+    struct uio auio;
+    struct iovec aiov;
+    struct vattr va;
+    off_t off;
+    struct linux_dirent linux_dirent;
+    int buflen, error, eofflag, nbytes, justone;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): readdir(%d, *, %d)\n",
+	   p->p_pid, args->fd, args->count);
+#endif
+    if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0)
+	return (error);
+
+    if ((fp->f_flag & FREAD) == 0)
+	return (EBADF);
+
+    vp = (struct vnode *) fp->f_data;
+
+    if (vp->v_type != VDIR)
+	return (EINVAL);
+
+    if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)))
+	return error;
+
+    nbytes = args->count;
+    if (nbytes == 1) {
+	nbytes = sizeof (struct linux_dirent);
+	justone = 1;
+    }
+    else
+	justone = 0;
+
+    buflen = max(va.va_blocksize, nbytes);
+    buf = malloc(buflen, M_TEMP, M_WAITOK);
+    VOP_LOCK(vp);
+    off = fp->f_offset;
+again:
+    aiov.iov_base = buf;
+    aiov.iov_len = buflen;
+    auio.uio_iov = &aiov;
+    auio.uio_iovcnt = 1;
+    auio.uio_rw = UIO_READ;
+    auio.uio_segflg = UIO_SYSSPACE;
+    auio.uio_procp = p;
+    auio.uio_resid = buflen;
+    auio.uio_offset = off;
+
+    error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *) 0, 0);
+    if (error)
+	goto out;
+
+    inp = buf;
+    outp = (caddr_t) args->dent;
+    resid = nbytes;
+    if ((len = buflen - auio.uio_resid) == 0)
+	goto eof;
+
+    while (len > 0) {
+	reclen = ((struct dirent *) inp)->d_reclen;
+	if (reclen & 3)
+	    panic("linux_readdir");
+	off += reclen;
+	bdp = (struct dirent *) inp;
+	if (bdp->d_fileno == 0) {
+	    inp += reclen;
+	    continue;
+	}
+	linuxreclen = LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
+	if (reclen > len || resid < linuxreclen) {
+	    outp++;
+	    break;
+	}
+	linux_dirent.dino = (long) bdp->d_fileno;
+	linux_dirent.doff = (linux_off_t) linuxreclen;
+	linux_dirent.dreclen = (u_short) bdp->d_namlen;
+	strcpy(linux_dirent.dname, bdp->d_name);
+	if ((error = copyout((caddr_t)&linux_dirent, outp, linuxreclen)))
+	    goto out;
+	inp += reclen;
+	outp += linuxreclen;
+	resid -= linuxreclen;
+	len -= reclen;
+	if (justone)
+	    break;
+    }
+
+    if (outp == (caddr_t) args->dent)
+	goto again;
+    fp->f_offset = off;
+
+    if (justone)
+	nbytes = resid + linuxreclen;
+eof:
+    *retval = nbytes - resid;
+out:
+    VOP_UNLOCK(vp);
+    free(buf, M_TEMP);
+    return error;
+}
diff --git a/sys/compat/linux/linux_ioctl.c b/sys/compat/linux/linux_ioctl.c
new file mode 100644
index 0000000..12adff4
--- /dev/null
+++ b/sys/compat/linux/linux_ioctl.c
@@ -0,0 +1,495 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_ioctl.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl_compat.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/tty.h>
+#include <sys/termios.h>
+#include <machine/console.h>
+
+
+struct linux_termios {
+    unsigned long   c_iflag;
+    unsigned long   c_oflag;
+    unsigned long   c_cflag;
+    unsigned long   c_lflag;
+    unsigned char   c_line;
+    unsigned char   c_cc[LINUX_NCCS];
+};
+
+struct linux_winsize {
+    unsigned short ws_row, ws_col;
+    unsigned short ws_xpixel, ws_ypixel;
+};
+
+static struct speedtab sptab[] = {
+    { 0, 0 }, { 50, 1 }, { 75, 2 }, { 110, 3 },
+    { 134, 4 }, { 135, 4 }, { 150, 5 }, { 200, 6 },
+    { 300, 7 }, { 600, 8 }, { 1200, 9 }, { 1800, 10 },
+    { 2400, 11 }, { 4800, 12 }, { 9600, 13 },
+    { 19200, 14 }, { 38400, 15 }, 
+    { 57600, 4097 }, { 115200, 4098 }, {-1, -1 }
+};
+
+static int
+linux_to_bsd_speed(int code, struct speedtab *table)
+{
+    for ( ; table->sp_code != -1; table++)
+	if (table->sp_code == code)
+	    return (table->sp_speed);
+    return -1;
+}
+
+static int
+bsd_to_linux_speed(int speed, struct speedtab *table)
+{
+    for ( ; table->sp_speed != -1; table++)
+	if (table->sp_speed == speed)
+	    return (table->sp_code);
+    return -1;
+}
+
+static void
+bsd_to_linux_termios(struct termios *bsd_termios, 
+		struct linux_termios *linux_termios)
+{
+    int i, speed;
+
+#ifdef DEBUG
+    printf("LINUX: BSD termios structure (input):\n");
+    printf("i=%08x o=%08x c=%08x l=%08x ispeed=%d ospeed=%d\n",
+	   bsd_termios->c_iflag, bsd_termios->c_oflag,
+	   bsd_termios->c_cflag, bsd_termios->c_lflag,
+	   bsd_termios->c_ispeed, bsd_termios->c_ospeed);
+    printf("c_cc ");
+    for (i=0; i<NCCS; i++)
+	printf("%02x ", bsd_termios->c_cc[i]);
+    printf("\n");
+#endif
+    linux_termios->c_iflag = 0;
+    if (bsd_termios->c_iflag & IGNBRK)
+	linux_termios->c_iflag |= LINUX_IGNBRK;
+    if (bsd_termios->c_iflag & BRKINT)
+	linux_termios->c_iflag |= LINUX_BRKINT;
+    if (bsd_termios->c_iflag & IGNPAR)
+	linux_termios->c_iflag |= LINUX_IGNPAR;
+    if (bsd_termios->c_iflag & PARMRK)
+	linux_termios->c_iflag |= LINUX_PARMRK;
+    if (bsd_termios->c_iflag & INPCK)
+	linux_termios->c_iflag |= LINUX_INPCK;
+    if (bsd_termios->c_iflag & ISTRIP)
+	linux_termios->c_iflag |= LINUX_ISTRIP;
+    if (bsd_termios->c_iflag & INLCR)
+	linux_termios->c_iflag |= LINUX_INLCR;
+    if (bsd_termios->c_iflag & IGNCR)
+	linux_termios->c_iflag |= LINUX_IGNCR;
+    if (bsd_termios->c_iflag & ICRNL)
+	linux_termios->c_iflag |= LINUX_ICRNL;
+    if (bsd_termios->c_iflag & IXON)
+	linux_termios->c_iflag |= LINUX_IXANY;
+    if (bsd_termios->c_iflag & IXON)
+	linux_termios->c_iflag |= LINUX_IXON;
+    if (bsd_termios->c_iflag & IXOFF)
+	linux_termios->c_iflag |= LINUX_IXOFF;
+    if (bsd_termios->c_iflag & IMAXBEL)
+	linux_termios->c_iflag |= LINUX_IMAXBEL;
+
+    linux_termios->c_oflag = 0;
+    if (bsd_termios->c_oflag & OPOST)
+	linux_termios->c_oflag |= LINUX_OPOST;
+    if (bsd_termios->c_oflag & ONLCR)
+	linux_termios->c_oflag |= LINUX_ONLCR;
+    if (bsd_termios->c_oflag & OXTABS)
+	linux_termios->c_oflag |= LINUX_XTABS;
+
+    linux_termios->c_cflag =
+	bsd_to_linux_speed(bsd_termios->c_ispeed, sptab);
+    linux_termios->c_cflag |= (bsd_termios->c_cflag & CSIZE) >> 4;
+    if (bsd_termios->c_cflag & CSTOPB)
+	linux_termios->c_cflag |= LINUX_CSTOPB;
+    if (bsd_termios->c_cflag & CREAD)
+	linux_termios->c_cflag |= LINUX_CREAD;
+    if (bsd_termios->c_cflag & PARENB)
+	linux_termios->c_cflag |= LINUX_PARENB;
+    if (bsd_termios->c_cflag & PARODD)
+	linux_termios->c_cflag |= LINUX_PARODD;
+    if (bsd_termios->c_cflag & HUPCL)
+	linux_termios->c_cflag |= LINUX_HUPCL;
+    if (bsd_termios->c_cflag & CLOCAL)
+	linux_termios->c_cflag |= LINUX_CLOCAL;
+    if (bsd_termios->c_cflag & CRTSCTS)
+	linux_termios->c_cflag |= LINUX_CRTSCTS;
+
+    linux_termios->c_lflag = 0;
+    if (bsd_termios->c_lflag & ISIG)
+	linux_termios->c_lflag |= LINUX_ISIG;
+    if (bsd_termios->c_lflag & ICANON)
+	linux_termios->c_lflag |= LINUX_ICANON;
+    if (bsd_termios->c_lflag & ECHO)
+	linux_termios->c_lflag |= LINUX_ECHO;
+    if (bsd_termios->c_lflag & ECHOE)
+	linux_termios->c_lflag |= LINUX_ECHOE;
+    if (bsd_termios->c_lflag & ECHOK)
+	linux_termios->c_lflag |= LINUX_ECHOK;
+    if (bsd_termios->c_lflag & ECHONL)
+	linux_termios->c_lflag |= LINUX_ECHONL;
+    if (bsd_termios->c_lflag & NOFLSH)
+	linux_termios->c_lflag |= LINUX_NOFLSH;
+    if (bsd_termios->c_lflag & TOSTOP)
+	linux_termios->c_lflag |= LINUX_TOSTOP;
+    if (bsd_termios->c_lflag & ECHOCTL)
+	linux_termios->c_lflag |= LINUX_ECHOCTL;
+    if (bsd_termios->c_lflag & ECHOPRT)
+	linux_termios->c_lflag |= LINUX_ECHOPRT;
+    if (bsd_termios->c_lflag & ECHOKE)
+	linux_termios->c_lflag |= LINUX_ECHOKE;
+    if (bsd_termios->c_lflag & FLUSHO)
+	linux_termios->c_lflag |= LINUX_FLUSHO;
+    if (bsd_termios->c_lflag & PENDIN)
+	linux_termios->c_lflag |= LINUX_PENDIN;
+    if (bsd_termios->c_lflag & IEXTEN)
+	linux_termios->c_lflag |= LINUX_IEXTEN;
+
+    for (i=0; i<LINUX_NCCS; i++) 
+	linux_termios->c_cc[i] = _POSIX_VDISABLE;
+    linux_termios->c_cc[LINUX_VINTR] = bsd_termios->c_cc[VINTR];
+    linux_termios->c_cc[LINUX_VQUIT] = bsd_termios->c_cc[VQUIT];
+    linux_termios->c_cc[LINUX_VERASE] = bsd_termios->c_cc[VERASE];
+    linux_termios->c_cc[LINUX_VKILL] = bsd_termios->c_cc[VKILL];
+    linux_termios->c_cc[LINUX_VEOF] = bsd_termios->c_cc[VEOF];
+    linux_termios->c_cc[LINUX_VEOL] = bsd_termios->c_cc[VEOL];
+    linux_termios->c_cc[LINUX_VMIN] = bsd_termios->c_cc[VMIN];
+    linux_termios->c_cc[LINUX_VTIME] = bsd_termios->c_cc[VTIME];
+    linux_termios->c_cc[LINUX_VEOL2] = bsd_termios->c_cc[VEOL2];
+    linux_termios->c_cc[LINUX_VSWTC] = _POSIX_VDISABLE;
+    linux_termios->c_cc[LINUX_VSUSP] = bsd_termios->c_cc[VSUSP];
+    linux_termios->c_cc[LINUX_VSTART] = bsd_termios->c_cc[VSTART];
+    linux_termios->c_cc[LINUX_VSTOP] = bsd_termios->c_cc[VSTOP];
+    linux_termios->c_cc[LINUX_VREPRINT] = bsd_termios->c_cc[VREPRINT];
+    linux_termios->c_cc[LINUX_VDISCARD] = bsd_termios->c_cc[VDISCARD];
+    linux_termios->c_cc[LINUX_VWERASE] = bsd_termios->c_cc[VWERASE];
+    linux_termios->c_cc[LINUX_VLNEXT] = bsd_termios->c_cc[VLNEXT];
+
+    linux_termios->c_line = 0;
+#ifdef DEBUG
+    printf("LINUX: LINUX termios structure (output):\n");
+    printf("i=%08x o=%08x c=%08x l=%08x line=%d\n",
+	   linux_termios->c_iflag, linux_termios->c_oflag,
+	   linux_termios->c_cflag, linux_termios->c_lflag,
+	   linux_termios->c_line);
+    printf("c_cc ");
+    for (i=0; i<LINUX_NCCS; i++) 
+	printf("%02x ", linux_termios->c_cc[i]);
+    printf("\n");
+#endif
+}
+
+static void
+linux_to_bsd_termios(struct linux_termios *linux_termios,
+		struct termios *bsd_termios)
+{
+    int i, speed;
+#ifdef DEBUG
+    printf("LINUX: LINUX termios structure (input):\n");
+    printf("i=%08x o=%08x c=%08x l=%08x line=%d\n",
+	   linux_termios->c_iflag, linux_termios->c_oflag,
+	   linux_termios->c_cflag, linux_termios->c_lflag,
+	   linux_termios->c_line);
+    printf("c_cc ");
+    for (i=0; i<LINUX_NCCS; i++) 
+	printf("%02x ", linux_termios->c_cc[i]);
+    printf("\n");
+#endif
+    bsd_termios->c_iflag = 0;
+    if (linux_termios->c_iflag & LINUX_IGNBRK)
+	bsd_termios->c_iflag |= IGNBRK;
+    if (linux_termios->c_iflag & LINUX_BRKINT)
+	bsd_termios->c_iflag |= BRKINT;
+    if (linux_termios->c_iflag & LINUX_IGNPAR)
+	bsd_termios->c_iflag |= IGNPAR;
+    if (linux_termios->c_iflag & LINUX_PARMRK)
+	bsd_termios->c_iflag |= PARMRK;
+    if (linux_termios->c_iflag & LINUX_INPCK)
+	bsd_termios->c_iflag |= INPCK;
+    if (linux_termios->c_iflag & LINUX_ISTRIP)
+	bsd_termios->c_iflag |= ISTRIP;
+    if (linux_termios->c_iflag & LINUX_INLCR)
+	bsd_termios->c_iflag |= INLCR;
+    if (linux_termios->c_iflag & LINUX_IGNCR)
+	bsd_termios->c_iflag |= IGNCR;
+    if (linux_termios->c_iflag & LINUX_ICRNL)
+	bsd_termios->c_iflag |= ICRNL;
+    if (linux_termios->c_iflag & LINUX_IXON)
+	bsd_termios->c_iflag |= IXANY;
+    if (linux_termios->c_iflag & LINUX_IXON)
+	bsd_termios->c_iflag |= IXON;
+    if (linux_termios->c_iflag & LINUX_IXOFF)
+	bsd_termios->c_iflag |= IXOFF;
+    if (linux_termios->c_iflag & LINUX_IMAXBEL)
+	bsd_termios->c_iflag |= IMAXBEL;
+
+    bsd_termios->c_oflag = 0;
+    if (linux_termios->c_oflag & LINUX_OPOST)
+	bsd_termios->c_oflag |= OPOST;
+    if (linux_termios->c_oflag & LINUX_ONLCR)
+	bsd_termios->c_oflag |= ONLCR;
+    if (linux_termios->c_oflag & LINUX_XTABS)
+	bsd_termios->c_oflag |= OXTABS;
+
+    bsd_termios->c_cflag = (linux_termios->c_cflag & LINUX_CSIZE) << 4;
+    if (linux_termios->c_cflag & LINUX_CSTOPB)
+	bsd_termios->c_cflag |= CSTOPB;
+    if (linux_termios->c_cflag & LINUX_PARENB)
+	bsd_termios->c_cflag |= PARENB;
+    if (linux_termios->c_cflag & LINUX_PARODD)
+	bsd_termios->c_cflag |= PARODD;
+    if (linux_termios->c_cflag & LINUX_HUPCL)
+	bsd_termios->c_cflag |= HUPCL;
+    if (linux_termios->c_cflag & LINUX_CLOCAL)
+	bsd_termios->c_cflag |= CLOCAL;
+    if (linux_termios->c_cflag & LINUX_CRTSCTS)
+	bsd_termios->c_cflag |= CRTSCTS;
+
+    bsd_termios->c_lflag = 0;
+    if (linux_termios->c_lflag & LINUX_ISIG)
+	bsd_termios->c_lflag |= ISIG;
+    if (linux_termios->c_lflag & LINUX_ICANON)
+	bsd_termios->c_lflag |= ICANON;
+    if (linux_termios->c_lflag & LINUX_ECHO)
+	bsd_termios->c_lflag |= ECHO;
+    if (linux_termios->c_lflag & LINUX_ECHOE)
+	bsd_termios->c_lflag |= ECHOE;
+    if (linux_termios->c_lflag & LINUX_ECHOK)
+	bsd_termios->c_lflag |= ECHOK;
+    if (linux_termios->c_lflag & LINUX_ECHONL)
+	bsd_termios->c_lflag |= ECHONL;
+    if (linux_termios->c_lflag & LINUX_NOFLSH)
+	bsd_termios->c_lflag |= NOFLSH;
+    if (linux_termios->c_lflag & LINUX_TOSTOP)
+	bsd_termios->c_lflag |= TOSTOP;
+    if (linux_termios->c_lflag & LINUX_ECHOCTL)
+	bsd_termios->c_lflag |= ECHOCTL;
+    if (linux_termios->c_lflag & LINUX_ECHOPRT)
+	bsd_termios->c_lflag |= ECHOPRT;
+    if (linux_termios->c_lflag & LINUX_ECHOKE)
+	bsd_termios->c_lflag |= ECHOKE;
+    if (linux_termios->c_lflag & LINUX_FLUSHO)
+	bsd_termios->c_lflag |= FLUSHO;
+    if (linux_termios->c_lflag & LINUX_PENDIN)
+	bsd_termios->c_lflag |= PENDIN;
+    if (linux_termios->c_lflag & IEXTEN)
+	bsd_termios->c_lflag |= IEXTEN;
+
+    for (i=0; i<NCCS; i++)
+	bsd_termios->c_cc[i] = _POSIX_VDISABLE;
+    bsd_termios->c_cc[VINTR] = linux_termios->c_cc[LINUX_VINTR];
+    bsd_termios->c_cc[VQUIT] = linux_termios->c_cc[LINUX_VQUIT];
+    bsd_termios->c_cc[VERASE] = linux_termios->c_cc[LINUX_VERASE];
+    bsd_termios->c_cc[VKILL] = linux_termios->c_cc[LINUX_VKILL];
+    bsd_termios->c_cc[VEOF] = linux_termios->c_cc[LINUX_VEOF];
+    bsd_termios->c_cc[VEOL] = linux_termios->c_cc[LINUX_VEOL];
+    bsd_termios->c_cc[VMIN] = linux_termios->c_cc[LINUX_VMIN];
+    bsd_termios->c_cc[VTIME] = linux_termios->c_cc[LINUX_VTIME];
+    bsd_termios->c_cc[VEOL2] = linux_termios->c_cc[LINUX_VEOL2];
+    bsd_termios->c_cc[VSUSP] = linux_termios->c_cc[LINUX_VSUSP];
+    bsd_termios->c_cc[VSTART] = linux_termios->c_cc[LINUX_VSTART];
+    bsd_termios->c_cc[VSTOP] = linux_termios->c_cc[LINUX_VSTOP];
+    bsd_termios->c_cc[VREPRINT] = linux_termios->c_cc[LINUX_VREPRINT];
+    bsd_termios->c_cc[VDISCARD] = linux_termios->c_cc[LINUX_VDISCARD];
+    bsd_termios->c_cc[VWERASE] = linux_termios->c_cc[LINUX_VWERASE];
+    bsd_termios->c_cc[VLNEXT] = linux_termios->c_cc[LINUX_VLNEXT];
+
+    bsd_termios->c_ispeed = bsd_termios->c_ospeed =
+	linux_to_bsd_speed(linux_termios->c_cflag & LINUX_CBAUD, sptab);
+#ifdef DEBUG
+	printf("LINUX: BSD termios structure (output):\n");
+	printf("i=%08x o=%08x c=%08x l=%08x ispeed=%d ospeed=%d\n",
+	       bsd_termios->c_iflag, bsd_termios->c_oflag,
+	       bsd_termios->c_cflag, bsd_termios->c_lflag,
+	       bsd_termios->c_ispeed, bsd_termios->c_ospeed);
+	printf("c_cc ");
+	for (i=0; i<NCCS; i++) 
+	    printf("%02x ", bsd_termios->c_cc[i]);
+	printf("\n");
+#endif
+}
+
+
+struct linux_ioctl_args {
+    int fd;
+    int cmd;
+    int arg;
+};
+
+int
+linux_ioctl(struct proc *p, struct linux_ioctl_args *args, int *retval)
+{
+    struct termios bsd_termios;
+    struct winsize bsd_winsize;
+    struct linux_termios linux_termios;
+    struct linux_winsize linux_winsize;
+    struct filedesc *fdp = p->p_fd;
+    struct file *fp;
+    int (*func)();
+    int bsd_line, linux_line;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): ioctl(%d, %04x, *)\n", 
+	   p->p_pid, args->fd, args->cmd);
+#endif
+    if ((unsigned)args->fd >= fdp->fd_nfiles 
+	|| (fp = fdp->fd_ofiles[args->fd]) == 0)
+	return EBADF;
+
+    if (!fp || (fp->f_flag & (FREAD | FWRITE)) == 0) {
+	return EBADF;
+    }
+
+    func = fp->f_ops->fo_ioctl;
+    switch (args->cmd) {
+    case LINUX_TCGETS:
+	if ((error = (*func)(fp, TIOCGETA, (caddr_t)&bsd_termios, p)) != 0)
+	    return error;
+	bsd_to_linux_termios(&bsd_termios, &linux_termios);
+	return copyout((caddr_t)&linux_termios, (caddr_t)args->arg,
+		       sizeof(linux_termios));
+
+    case LINUX_TCSETS:
+	linux_to_bsd_termios((struct linux_termios *)args->arg, &bsd_termios);
+	return (*func)(fp, TIOCSETA, (caddr_t)&bsd_termios, p);
+
+    case LINUX_TCSETSW:
+	linux_to_bsd_termios((struct linux_termios *)args->arg, &bsd_termios);
+	return (*func)(fp, TIOCSETAW, (caddr_t)&bsd_termios, p);
+
+    case LINUX_TCSETSF:
+	linux_to_bsd_termios((struct linux_termios *)args->arg, &bsd_termios);
+	return (*func)(fp, TIOCSETAF, (caddr_t)&bsd_termios, p);
+	    
+    case LINUX_TIOCGPGRP:
+	args->cmd = TIOCGPGRP;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCSPGRP:
+	args->cmd = TIOCSPGRP;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCGWINSZ:
+	args->cmd = TIOCGWINSZ;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCSWINSZ:
+	args->cmd = TIOCSWINSZ;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIONREAD:
+	args->cmd = FIONREAD;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIONBIO:
+	args->cmd = FIONBIO;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIOASYNC:
+	args->cmd = FIOASYNC;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIONCLEX:
+	args->cmd = FIONCLEX;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIOCLEX:
+	args->cmd = FIOCLEX;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCEXCL:
+	args->cmd = TIOCEXCL;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCNXCL:
+	args->cmd = TIOCNXCL;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCCONS:
+	args->cmd = TIOCCONS;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCNOTTY:
+	args->cmd = TIOCNOTTY;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCSETD:
+	switch (args->arg) {
+	case LINUX_N_TTY:
+	    bsd_line = TTYDISC;
+	    return (*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p);
+	case LINUX_N_SLIP:
+	    bsd_line = SLIPDISC;
+	    return (*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p);
+	case LINUX_N_PPP:
+	    bsd_line = PPPDISC;
+	    return (*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p);
+	default:
+	    return EINVAL;
+	}
+	break;
+
+    case LINUX_TIOCGETD:
+	bsd_line = TTYDISC;
+	if (error =(*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p))
+	    return error;
+	switch (bsd_line) {
+	case TTYDISC:
+	    linux_line = LINUX_N_TTY;
+	    break;
+	case SLIPDISC:
+	    linux_line = LINUX_N_SLIP;
+	    break;
+	case PPPDISC:
+	    linux_line = LINUX_N_PPP;
+	    break;
+	default:
+	    return EINVAL;
+	}
+	return copyout(&linux_line, (caddr_t)args->arg, 
+		       sizeof(int));
+    }
+    uprintf("LINUX: 'ioctl' fd=%d, typ=0x%x(%c), num=0x%x not implemented\n",
+	    args->fd, (args->cmd&0xffff00)>>8,
+	    (args->cmd&0xffff00)>>8, args->cmd&0xff);
+    return EINVAL;
+}
diff --git a/sys/compat/linux/linux_ipc.c b/sys/compat/linux/linux_ipc.c
new file mode 100644
index 0000000..b38b229
--- /dev/null
+++ b/sys/compat/linux/linux_ipc.c
@@ -0,0 +1,308 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_ipc.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/proc.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+#include <sys/msg.h>
+
+#include <vm/vm.h>
+
+struct linux_ipc_perm {
+    linux_key_t key;
+    unsigned short uid;
+    unsigned short gid;
+    unsigned short cuid;
+    unsigned short cgid;
+    unsigned short mode;
+    unsigned short seq;
+};
+
+static void
+linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp)
+{
+    bpp->key = lpp->key;
+    bpp->uid = lpp->uid;
+    bpp->gid = lpp->gid;
+    bpp->cuid = lpp->cuid;
+    bpp->cgid = lpp->cgid;
+    bpp->mode = lpp->mode;
+    bpp->seq = lpp->seq;
+}
+
+
+static void
+bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp)
+{
+    lpp->key = bpp->key;
+    lpp->uid = bpp->uid;
+    lpp->gid = bpp->gid;
+    lpp->cuid = bpp->cuid;
+    lpp->cgid = bpp->cgid;
+    lpp->mode = bpp->mode;
+    lpp->seq = bpp->seq;
+}
+
+struct linux_shmid_ds {
+    struct linux_ipc_perm shm_perm;
+    int shm_segsz;
+    linux_time_t shm_atime;
+    linux_time_t shm_dtime;
+    linux_time_t shm_ctime;
+    ushort shm_cpid;
+    ushort shm_lpid;
+    short shm_nattch;
+    ushort private1;
+    void *private2;
+    void *private3;
+};
+
+static void
+linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp)
+{
+    linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
+    bsp->shm_segsz = lsp->shm_segsz;
+    bsp->shm_lpid = lsp->shm_lpid;
+    bsp->shm_cpid = lsp->shm_cpid;
+    bsp->shm_nattch = lsp->shm_nattch;
+    bsp->shm_atime = lsp->shm_atime;
+    bsp->shm_dtime = lsp->shm_dtime;
+    bsp->shm_ctime = lsp->shm_ctime;
+    bsp->shm_internal = lsp->private3;	/* this goes (yet) SOS */
+}
+
+static void
+bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp)
+{
+    bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
+    lsp->shm_segsz = bsp->shm_segsz;
+    lsp->shm_lpid = bsp->shm_lpid;
+    lsp->shm_cpid = bsp->shm_cpid;
+    lsp->shm_nattch = bsp->shm_nattch;
+    lsp->shm_atime = bsp->shm_atime;
+    lsp->shm_dtime = bsp->shm_dtime;
+    lsp->shm_ctime = bsp->shm_ctime;
+    lsp->private3 = bsp->shm_internal;	/* this goes (yet) SOS */
+}
+
+struct linux_ipc_args {
+    int what;
+    int arg1;
+    int arg2;
+    int arg3;
+    caddr_t ptr;
+};
+
+int
+linux_semop(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_semget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_semctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgsnd(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgrcv(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_shmat(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmat_args {
+	int shmid;
+	void *shmaddr;
+	int shmflg;
+    } bsd_args;
+    int error;
+
+    bsd_args.shmid = args->arg1;
+    bsd_args.shmaddr = args->ptr;
+    bsd_args.shmflg = args->arg2;
+    if ((error = shmat(p, &bsd_args, retval)))
+	return error;
+    if ((error = copyout(retval, (caddr_t)args->arg3, sizeof(int))))
+	return error;
+    retval[0] = 0;
+    return 0;
+}
+
+int
+linux_shmdt(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmdt_args {
+	void *shmaddr;
+    } bsd_args;
+
+    bsd_args.shmaddr = args->ptr;
+    return shmdt(p, &bsd_args, retval);
+}
+
+int
+linux_shmget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmget_args {
+	key_t key;
+	int size;
+	int shmflg;
+    } bsd_args;
+
+    bsd_args.key = args->arg1;
+    bsd_args.size = args->arg2;
+    bsd_args.shmflg = args->arg3;
+    return shmget(p, &bsd_args, retval);
+}
+
+int
+linux_shmctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmid_ds bsd_shmid;
+    struct linux_shmid_ds linux_shmid;
+    struct shmctl_args {
+	int shmid;
+	int cmd;
+	struct shmid_ds *buf;
+    } bsd_args;
+    int error;
+
+    switch (args->arg2) {
+    case LINUX_IPC_STAT:
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_STAT;
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = shmctl(p, &bsd_args, retval)))
+	    return error;
+	if ((error = copyin((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		    	    sizeof(struct shmid_ds))))
+	    return error;
+	bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
+	return copyout((caddr_t)&linux_shmid, args->ptr, sizeof(linux_shmid));
+
+    case LINUX_IPC_SET:
+	if ((error = copyin(args->ptr, (caddr_t)&linux_shmid,
+		    	    sizeof(linux_shmid))))
+	    return error;
+	linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		     	     sizeof(struct shmid_ds))))
+	    return error;
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_SET;
+	return shmctl(p, &bsd_args, retval);
+
+    case LINUX_IPC_RMID:
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_RMID;
+	if ((error = copyin(args->ptr, (caddr_t)&linux_shmid, 
+		    	    sizeof(linux_shmid))))
+	    return error;
+	linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		     	     sizeof(struct shmid_ds))))
+	    return error;
+	return shmctl(p, &bsd_args, retval);
+
+    case LINUX_IPC_INFO:
+    case LINUX_SHM_STAT:
+    case LINUX_SHM_INFO:
+    case LINUX_SHM_LOCK:
+    case LINUX_SHM_UNLOCK:
+    default:
+	uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
+	return EINVAL;
+    }
+}
+
+int
+linux_ipc(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    switch (args->what) {
+    case LINUX_SEMOP:
+	return linux_semop(p, args, retval);
+    case LINUX_SEMGET:
+	return linux_semget(p, args, retval);
+    case LINUX_SEMCTL:
+	return linux_semctl(p, args, retval);
+    case LINUX_MSGSND:
+	return linux_msgsnd(p, args, retval);
+    case LINUX_MSGRCV:
+	return linux_msgrcv(p, args, retval);
+    case LINUX_MSGGET:
+	return linux_msgget(p, args, retval);
+    case LINUX_MSGCTL:
+	return linux_msgctl(p, args, retval);
+    case LINUX_SHMAT:
+	return linux_shmat(p, args, retval);
+    case LINUX_SHMDT:
+	return linux_shmdt(p, args, retval);
+    case LINUX_SHMGET:
+	return linux_shmget(p, args, retval);
+    case LINUX_SHMCTL:
+	return linux_shmctl(p, args, retval);
+    default:
+	uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
+	return ENOSYS;
+    }
+}
diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
new file mode 100644
index 0000000..bf40786
--- /dev/null
+++ b/sys/compat/linux/linux_misc.c
@@ -0,0 +1,660 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_misc.c,v 1.4 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/mman.h>
+#include <sys/proc.h>
+#include <sys/dirent.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/ioctl.h>
+#include <sys/imgact_aout.h>
+#include <sys/mount.h>
+#include <sys/namei.h>
+#include <sys/resource.h>
+#include <sys/resourcevar.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/times.h>
+#include <sys/utsname.h>
+#include <sys/vnode.h>
+#include <sys/wait.h>
+
+#include <machine/cpu.h>
+#include <machine/psl.h>
+#include <machine/reg.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+
+
+struct linux_alarm_args {
+    unsigned int secs;
+};
+
+int
+linux_alarm(struct proc *p, struct linux_alarm_args *args, int *retval)
+{
+    extern struct timeval time;
+    struct itimerval it, old_it;
+    int s;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): alarm(%d)\n", p->p_pid, args->secs);
+#endif
+    it.it_value.tv_sec = (long)args->secs;
+    it.it_value.tv_usec = 0;
+    it.it_interval.tv_sec = 0;
+    it.it_interval.tv_usec = 0;
+    s = splclock();
+    old_it = p->p_realtimer;
+    if (timerisset(&old_it.it_value))
+	if (timercmp(&old_it.it_value, &time, <))
+	    timerclear(&old_it.it_value);
+	else
+	    timevalsub(&old_it.it_value, &time);
+    splx(s);
+    if (itimerfix(&it.it_value) || itimerfix(&it.it_interval))
+	return EINVAL;
+    s = splclock();
+    untimeout(realitexpire, (caddr_t)p);
+    if (timerisset(&it.it_value)) {
+	timevaladd(&it.it_value, &time);
+	timeout(realitexpire, (caddr_t)p, hzto(&it.it_value));
+    }
+    p->p_realtimer = it;
+    splx(s);
+    if (old_it.it_value.tv_usec)
+	old_it.it_value.tv_sec++;
+    *retval = old_it.it_value.tv_sec;
+    return 0;
+}
+
+struct linux_brk_args {
+    linux_caddr_t dsend;
+};
+
+int
+linux_brk(struct proc *p, struct linux_brk_args *args, int *retval)
+{
+#if 0
+    struct vmspace *vm = p->p_vmspace;
+    vm_offset_t new, old;
+    int error;
+    extern int swap_pager_full;
+
+    if ((vm_offset_t)args->dsend < (vm_offset_t)vm->vm_daddr)
+	return EINVAL;
+    if (((caddr_t)args->dsend - (caddr_t)vm->vm_daddr)
+	> p->p_rlimit[RLIMIT_DATA].rlim_cur)
+	return ENOMEM;
+
+    old = round_page((vm_offset_t)vm->vm_daddr) + ctob(vm->vm_dsize);
+    new = round_page((vm_offset_t)args->dsend);
+    *retval = old;
+    if ((new-old) > 0) {
+	if (swap_pager_full)
+	    return ENOMEM;
+	error = vm_map_find(&vm->vm_map, NULL, 0, &old, (new-old), FALSE);
+	if (error) 
+	    return error;
+	vm->vm_dsize += btoc((new-old));
+	*retval = (int)(vm->vm_daddr + ctob(vm->vm_dsize));
+    }
+    return 0;
+#else
+    struct vmspace *vm = p->p_vmspace;
+    vm_offset_t new, old;
+    struct obreak_args {
+	vm_offset_t newsize;
+    } tmp;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): brk(%08x)\n", p->p_pid, args->dsend);
+#endif
+    old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
+    new = (vm_offset_t)args->dsend;
+    tmp.newsize = new;
+    if (((caddr_t)new > vm->vm_daddr) && !obreak(p, &tmp, retval))
+	retval[0] = (int)new;
+    else
+	retval[0] = (int)old;
+
+    return 0;
+#endif
+}
+
+struct linux_uselib_args {
+    char *library;
+};
+
+int
+linux_uselib(struct proc *p, struct linux_uselib_args *args, int *retval)
+{
+    struct nameidata ni;
+    struct vnode *vnodep;
+    struct exec *a_out = 0;
+    struct vattr attr;
+    unsigned long vmaddr, virtual_offset, file_offset;
+    unsigned long buffer, bss_size;
+    char *ptr;
+    char path[MAXPATHLEN];
+    const char *prefix = "/compat/linux";
+    size_t sz, len;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): uselib(%s)\n", p->p_pid, args->library);
+#endif
+
+    for (ptr = path; (*ptr = *prefix) != '\0'; ptr++, prefix++) ;
+    sz = MAXPATHLEN - (ptr - path);
+    if (error = copyinstr(args->library, ptr, sz, &len))
+	return error;
+    if (*ptr != '/')
+	return EINVAL;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): uselib(%s)\n", p->p_pid, path);
+#endif
+
+    NDINIT(&ni, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p);
+    if (error = namei(&ni))
+	return error;
+
+    vnodep = ni.ni_vp;
+    if (vnodep == NULL)
+	    return ENOEXEC;
+
+    if (vnodep->v_writecount)
+	    return ETXTBSY;
+
+    if (error = VOP_GETATTR(vnodep, &attr, p->p_ucred, p))
+	return error;
+
+    if ((vnodep->v_mount->mnt_flag & MNT_NOEXEC)
+	|| ((attr.va_mode & 0111) == 0)
+	|| (attr.va_type != VREG))
+	    return ENOEXEC;
+
+    if (attr.va_size == 0)
+	    return ENOEXEC;
+
+    if (error = VOP_ACCESS(vnodep, VEXEC, p->p_ucred, p))
+	return error;
+
+    if (error = VOP_OPEN(vnodep, FREAD, p->p_ucred, p))
+	return error;
+
+    error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, 1024,
+	    	    VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vnodep, 0);
+    if (error)
+	return (error);
+
+    /*
+     * Is it a Linux binary ?
+     */
+    if (((a_out->a_magic >> 16) & 0xff) != 0x64)
+	return -1;
+
+    /*
+     * Set file/virtual offset based on a.out variant.
+     */
+    switch ((int)(a_out->a_magic & 0xffff)) {
+    case 0413:	/* ZMAGIC */
+	virtual_offset = 0;
+	file_offset = 1024;
+	break;
+    case 0314:	/* QMAGIC */
+	virtual_offset = 4096;
+	file_offset = 0;
+	break;
+    default:
+	return (-1);
+    }
+
+    vnodep->v_flag |= VTEXT;
+    bss_size = round_page(a_out->a_bss);
+    /*
+     * Check if file_offset page aligned,.
+     * Currently we cannot handle misalinged file offsets,
+     * and so we read in the entire image (what a waste).
+     */
+    if (file_offset & PGOFSET) {
+#ifdef DEBUG
+printf("uselib: Non page aligned binary %d\n", file_offset);
+#endif
+	/*
+	 * Map text+data read/write/execute
+	 */
+	vmaddr = virtual_offset + round_page(a_out->a_entry);
+	error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr,
+		    	    round_page(a_out->a_text + a_out->a_data), FALSE);
+	if (error)
+	    return error;
+
+	error = vm_mmap(kernel_map, &buffer,
+			round_page(a_out->a_text + a_out->a_data + file_offset),
+		   	VM_PROT_READ, VM_PROT_READ, MAP_FILE,
+			(caddr_t)vnodep, trunc_page(file_offset));
+	if (error)
+	    return error;
+
+	error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr, 
+			a_out->a_text + a_out->a_data);
+	if (error)
+	    return error;
+
+	vm_map_remove(kernel_map, trunc_page(vmaddr),
+		      round_page(a_out->a_text + a_out->a_data + file_offset));
+
+	error = vm_map_protect(&p->p_vmspace->vm_map, vmaddr,
+		   	       round_page(a_out->a_text + a_out->a_data),
+		   	       VM_PROT_ALL, TRUE);
+	if (error)
+	    return error;
+    }
+    else {
+#ifdef DEBUG
+printf("uselib: Page aligned binary %d\n", file_offset);
+#endif
+	vmaddr = virtual_offset + round_page(a_out->a_entry);
+	error = vm_mmap(&p->p_vmspace->vm_map, &vmaddr,
+			a_out->a_text + a_out->a_data,
+			VM_PROT_ALL, VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED,
+			(caddr_t)vnodep, file_offset);
+	if (error)
+	    return (error);
+    }
+#ifdef DEBUG
+printf("mem=%08x = %08x %08x\n", vmaddr, ((int*)vmaddr)[0], ((int*)vmaddr)[1]);
+#endif
+    if (bss_size != 0) {
+	vmaddr = virtual_offset + round_page(a_out->a_entry) +
+		 round_page(a_out->a_text + a_out->a_data);
+	error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr, 
+			    bss_size, FALSE);
+	if (error)
+	    return error;
+	error = vm_map_protect(&p->p_vmspace->vm_map, vmaddr, bss_size,
+		   	       VM_PROT_ALL, TRUE);
+	if (error)
+	    return error;
+    }
+    return 0;
+}
+
+struct linux_select_args {
+    void *ptr;
+};
+
+int
+linux_select(struct proc *p, struct linux_select_args *args, int *retval)
+{
+    struct {
+	int nfds;
+	fd_set *readfds;
+	fd_set *writefds;
+	fd_set *exceptfds;
+	struct timeval *timeout; 
+    } linux_args;
+    struct {
+	unsigned int nd;
+	fd_set *in;
+	fd_set *ou;
+	fd_set *ex;
+	struct timeval *tv;
+    } bsd_args;
+    int error;
+
+    if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
+			sizeof(linux_args))))
+	return error;
+#ifdef DEBUG
+    printf("Linux-emul(%d): select(%d, %d, %d, %d, %d)\n", 
+	   p->p_pid, linux_args.nfds, linux_args.readfds,
+	   linux_args.writefds, linux_args.exceptfds, 
+	   linux_args.timeout);
+#endif
+    bsd_args.nd = linux_args.nfds;
+    bsd_args.in = linux_args.readfds;
+    bsd_args.ou = linux_args.writefds;
+    bsd_args.ex = linux_args.exceptfds;
+    bsd_args.tv = linux_args.timeout;
+    return select(p, &bsd_args, retval);
+}
+
+struct linux_getpgid_args {
+    int pid;
+};
+
+int
+linux_getpgid(struct proc *p, struct linux_getpgid_args *args, int *retval)
+{
+    struct proc *curproc;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): getpgid(%d)\n", p->p_pid, args->pid);
+#endif
+    if (args->pid != p->p_pid) {
+	if (!(curproc = pfind(args->pid)))
+	    return ESRCH;
+    }
+    else
+	curproc = p;
+    *retval = curproc->p_pgid;
+    return 0;
+}
+
+int
+linux_fork(struct proc *p, void *args, int *retval)
+{
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): fork()\n", p->p_pid);
+#endif
+    if (error = fork(p, args, retval))
+	return error;
+    if (retval[1] == 1)
+	retval[0] = 0;
+    return 0;
+}
+
+struct linux_mmap_args {
+    void *ptr;
+};
+
+int
+linux_mmap(struct proc *p, struct linux_mmap_args *args, int *retval)
+{
+    struct {
+	linux_caddr_t addr;
+	int len;
+	int prot;
+	int flags;
+	int fd;
+	int pos;
+    } linux_args;
+    struct {
+	caddr_t addr;
+	size_t len;
+	int prot;
+	int flags;
+	int fd;
+	long pad;
+	off_t pos;
+    } bsd_args;
+    int error;
+
+    if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
+			sizeof(linux_args))))
+	return error;
+#ifdef DEBUG
+    printf("Linux-emul(%d): mmap(%08x, %d, %d, %08x, %d, %d)\n",
+	   p->p_pid, linux_args.addr, linux_args.len, linux_args.prot, 
+	   linux_args.flags, linux_args.fd, linux_args.pos);
+#endif
+    bsd_args.flags = 0;
+    if (linux_args.flags & LINUX_MAP_SHARED)
+	bsd_args.flags |= MAP_SHARED;
+    if (linux_args.flags & LINUX_MAP_PRIVATE)
+	bsd_args.flags |= MAP_PRIVATE;
+    if (linux_args.flags & LINUX_MAP_FIXED)
+	bsd_args.flags |= MAP_FIXED;
+    if (linux_args.flags & LINUX_MAP_ANON)
+	bsd_args.flags |= MAP_ANON;
+    bsd_args.addr = linux_args.addr;
+    bsd_args.len = linux_args.len;
+    bsd_args.prot = linux_args.prot;
+    bsd_args.fd = linux_args.fd;
+    bsd_args.pos = linux_args.pos;
+    bsd_args.pad = 0;
+    return mmap(p, &bsd_args, retval);
+}
+
+struct linux_pipe_args {
+    int *pipefds;
+};
+
+int
+linux_pipe(struct proc *p, struct linux_pipe_args *args, int *retval)
+{
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): pipe(*)\n", p->p_pid);
+#endif
+    if (error = pipe(p, 0, retval))
+	return error;
+    if (error = copyout(retval, args->pipefds, 2*sizeof(int)))
+	return error;
+    *retval = 0;
+    return 0;
+}
+
+struct linux_time_args {
+    linux_time_t *tm;
+};
+
+int
+linux_time(struct proc *p, struct linux_time_args *args, int *retval)
+{
+    struct timeval tv;
+    linux_time_t tm;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): time(*)\n", p->p_pid);
+#endif
+    microtime(&tv);
+    tm = tv.tv_sec;
+    if (error = copyout(&tm, args->tm, sizeof(linux_time_t)))
+	return error;
+    *retval = tv.tv_sec;
+    return 0;
+}
+
+struct linux_tms {
+    long    tms_utime;
+    long    tms_stime;
+    long    tms_cutime;
+    long    tms_cstime;
+};
+
+struct linux_tms_args {
+    char *buf;
+};
+
+int
+linux_times(struct proc *p, struct linux_tms_args *args, int *retval)
+{
+    extern int hz;
+    struct timeval tv;
+    struct linux_tms tms;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): times(*)\n", p->p_pid);
+#endif
+    tms.tms_utime = p->p_uticks;
+    tms.tms_stime = p->p_sticks;
+    tms.tms_cutime = p->p_stats->p_cru.ru_utime.tv_sec * hz +
+	    ((p->p_stats->p_cru.ru_utime.tv_usec * hz)/1000000);
+    tms.tms_cstime = p->p_stats->p_cru.ru_stime.tv_sec * hz +
+	    ((p->p_stats->p_cru.ru_stime.tv_usec * hz)/1000000);
+    microtime(&tv);
+    *retval = tv.tv_sec * hz + (tv.tv_usec * hz)/1000000;
+    return (copyout((caddr_t)&tms, (caddr_t)args->buf,
+	    	    sizeof(struct linux_tms)));
+}
+
+struct linux_newuname_t {
+    char sysname[65];
+    char nodename[65];
+    char release[65];
+    char version[65];
+    char machine[65];
+    char domainname[65];
+};
+
+struct linux_newuname_args {
+    char *buf;
+};
+
+int
+linux_newuname(struct proc *p, struct linux_newuname_args *args, int *retval)
+{
+    struct linux_newuname_t linux_newuname;
+    extern char ostype[], osrelease[], machine[];
+    extern char hostname[], domainname[];
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): newuname(*)\n", p->p_pid);
+#endif
+    bzero(&linux_newuname, sizeof(struct linux_newuname_args));
+    strncpy(linux_newuname.sysname, ostype, 64);
+    strncpy(linux_newuname.nodename, hostname, 64);
+    strncpy(linux_newuname.release, osrelease, 64);
+    strncpy(linux_newuname.version, version, 64);
+    strncpy(linux_newuname.machine, machine, 64);
+    strncpy(linux_newuname.domainname, domainname, 64);
+    return (copyout((caddr_t)&linux_newuname, (caddr_t)args->buf,
+	    	    sizeof(struct linux_newuname_t)));
+}
+
+struct linux_utime_args {
+    char	*fname;
+    linux_time_t    *timeptr;
+};
+
+int
+linux_utime(struct proc *p, struct linux_utime_args *args, int *retval)
+{
+    struct bsd_utimes_args {
+	char	*fname;
+	struct	timeval *tptr;
+    } bsdutimes;
+    struct timeval tv;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): utime(%s, *)\n", p->p_pid, args->fname);
+#endif
+    tv.tv_sec = (long)args->timeptr;
+    tv.tv_usec = 0;
+    bsdutimes.tptr = &tv;
+    bsdutimes.fname = args->fname;
+    return utimes(p, &bsdutimes, retval);
+}
+
+struct linux_waitpid_args {
+    int pid;
+    int *status;
+    int options;
+};
+
+int
+linux_waitpid(struct proc *p, struct linux_waitpid_args *args, int *retval)
+{
+    struct wait4_args {
+	int pid;
+	int *status;
+	int options;
+	struct	rusage *rusage;
+	int compat;
+    } tmp;
+    int error, tmpstat;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): waitpid(%d, *, %d)\n", 
+	   p->p_pid, args->pid, args->options);
+#endif
+    tmp.pid = args->pid;
+    tmp.status = args->status;
+    tmp.options = args->options;
+    tmp.rusage = NULL;
+    tmp.compat = 0;
+
+    if (error = wait4(p, &tmp, retval))
+	return error;
+    if (error = copyin(args->status, &tmpstat, sizeof(int)))
+	return error;
+    if (WIFSIGNALED(tmpstat))
+	tmpstat = (tmpstat & 0xffffff80) |
+		  bsd_to_linux_signal[WTERMSIG(tmpstat)];
+    else if (WIFSTOPPED(tmpstat))
+	tmpstat = (tmpstat & 0xffff00ff) |
+	      	  (bsd_to_linux_signal[WSTOPSIG(tmpstat)]<<8);
+    return copyout(&tmpstat, args->status, sizeof(int));
+}
+
+struct linux_wait4_args {
+    int pid;
+    int *status;
+    int options;
+    struct rusage *rusage;
+};
+
+int 
+linux_wait4(struct proc *p, struct linux_wait4_args *args, int *retval)
+{
+    struct wait4_args {
+	int pid;
+	int *status;
+	int options;
+	struct	rusage *rusage;
+	int compat;
+    } tmp;
+    int error, tmpstat;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): wait4(%d, *, %d, *)\n", 
+	   p->p_pid, args->pid, args->options);
+#endif
+    tmp.pid = args->pid;
+    tmp.status = args->status;
+    tmp.options = args->options;
+    tmp.rusage = args->rusage;
+    tmp.compat = 0;
+
+    if (error = wait4(p, &tmp, retval))
+	return error;
+    if (error = copyin(args->status, &tmpstat, sizeof(int)))
+	return error;
+    if (WIFSIGNALED(tmpstat))
+	tmpstat = (tmpstat & 0xffffff80) |
+	      bsd_to_linux_signal[WTERMSIG(tmpstat)];
+    else if (WIFSTOPPED(tmpstat))
+	tmpstat = (tmpstat & 0xffff00ff) |
+	      (bsd_to_linux_signal[WSTOPSIG(tmpstat)]<<8);
+    return copyout(&tmpstat, args->status, sizeof(int));
+}
diff --git a/sys/compat/linux/linux_signal.c b/sys/compat/linux/linux_signal.c
new file mode 100644
index 0000000..528bb62
--- /dev/null
+++ b/sys/compat/linux/linux_signal.c
@@ -0,0 +1,259 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_signal.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/exec.h>
+#include <sys/signal.h>
+#include <sys/signalvar.h>
+
+#include <vm/vm.h>
+
+#include <i386/linux/linux.h>
+
+#define DONTMASK    (sigmask(SIGKILL)|sigmask(SIGSTOP)|sigmask(SIGCHLD))
+
+static sigset_t
+linux_to_bsd_sigmask(linux_sigset_t mask) {
+    int i;
+    sigset_t new = 0;
+
+    for (i = 1; i <= LINUX_NSIG; i++)
+	if (mask & (1 << i-1))
+	    new |= (1 << (linux_to_bsd_signal[i]-1));
+    return new;
+}
+
+static linux_sigset_t
+bsd_to_linux_sigmask(sigset_t mask) {
+    int i;
+    sigset_t new = 0;
+
+    for (i = 1; i <= NSIG; i++)
+	if (mask & (1 << i-1))
+	    new |= (1 << (bsd_to_linux_signal[i]-1));
+    return new;
+}
+
+struct linux_sigaction_args {
+    int sig;
+    linux_sigaction_t *nsa;
+    linux_sigaction_t *osa;
+};
+
+int
+linux_sigaction(struct proc *p, struct linux_sigaction_args *args, int *retval)
+{
+    linux_sigaction_t linux_sa;
+    struct sigaction *nsa = NULL, *osa = NULL, bsd_sa;
+    struct sigaction_args {
+	int sig;
+	struct sigaction *nsa;
+	struct sigaction *osa;
+    } sa;
+    int error;
+    
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigaction(%d, *, *)\n", p->p_pid, args->sig);
+#endif
+    if (args->osa)
+	osa = (struct sigaction *)ua_alloc_init(sizeof(struct sigaction));
+
+    if (args->nsa) {
+	nsa = (struct sigaction *)ua_alloc(sizeof(struct sigaction));
+	if (error = copyin(args->nsa, &linux_sa, sizeof(linux_sigaction_t)))
+	    return error;
+	bsd_sa.sa_mask = linux_to_bsd_sigmask(linux_sa.sa_mask);
+	bsd_sa.sa_handler = linux_sa.sa_handler;
+	bsd_sa.sa_flags = 0;
+	if (linux_sa.sa_flags & LINUX_SA_NOCLDSTOP)
+	    bsd_sa.sa_flags |= SA_NOCLDSTOP;
+	if (linux_sa.sa_flags & LINUX_SA_ONSTACK)
+	    bsd_sa.sa_flags |= SA_ONSTACK;
+	if (linux_sa.sa_flags & LINUX_SA_RESTART)
+	    bsd_sa.sa_flags |= SA_RESTART;
+	if (error = copyout(&bsd_sa, nsa, sizeof(struct sigaction)))
+	    return error;
+    }
+    sa.sig = linux_to_bsd_signal[args->sig];
+    sa.nsa = nsa;
+    sa.osa = osa;
+    if ((error = sigaction(p, &sa, retval)))
+	return error;
+
+    if (args->osa) {
+	if (error = copyin(osa, &bsd_sa, sizeof(struct sigaction)))
+	    return error;
+	linux_sa.sa_handler = bsd_sa.sa_handler;
+	linux_sa.sa_restorer = NULL;
+	linux_sa.sa_mask = bsd_to_linux_sigmask(bsd_sa.sa_mask);
+	linux_sa.sa_flags = 0;
+	if (bsd_sa.sa_flags & SA_NOCLDSTOP)
+	    linux_sa.sa_flags |= LINUX_SA_NOCLDSTOP;
+	if (bsd_sa.sa_flags & SA_ONSTACK)
+	    linux_sa.sa_flags |= LINUX_SA_ONSTACK;
+	if (bsd_sa.sa_flags & SA_RESTART)
+	    linux_sa.sa_flags |= LINUX_SA_RESTART;
+	if (error = copyout(&linux_sa, args->osa, sizeof(linux_sigaction_t)))
+	    return error;
+    }
+    return 0;
+}
+
+struct linux_sigprocmask_args {
+    int how;
+    linux_sigset_t *mask;
+    linux_sigset_t *omask;
+};
+
+int
+linux_sigprocmask(struct proc *p, struct linux_sigprocmask_args *args,
+		  int *retval)
+{
+    int error, s;
+    sigset_t mask;
+    sigset_t omask;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigprocmask(%d, *, *)\n", p->p_pid, args->how);
+#endif
+    if (args->omask != NULL) {
+	omask = bsd_to_linux_sigmask(p->p_sigmask);
+	if (error = copyout(&omask, args->omask, sizeof(sigset_t)))
+	    return error;
+    }
+    if (!(args->mask))
+	return 0;
+    if (error = copyin(args->mask, &mask, sizeof(linux_sigset_t)))
+	return error;
+
+    mask = linux_to_bsd_sigmask(mask);
+    s = splhigh();
+    switch (args->how) {
+    case LINUX_SIG_BLOCK:
+	p->p_sigmask |= (mask & ~DONTMASK);
+	break;
+    case LINUX_SIG_UNBLOCK:
+	p->p_sigmask &= ~mask;
+	break;
+    case LINUX_SIG_SETMASK:
+	p->p_sigmask = (mask & ~DONTMASK);
+	break;
+    default:
+	error = EINVAL;
+	break;
+    }
+    splx(s);
+    return error;
+}
+
+int
+linux_siggetmask(struct proc *p, void *args, int *retval)
+{
+#ifdef DEBUG
+    printf("Linux-emul(%d): siggetmask()\n", p->p_pid);
+#endif
+    *retval = bsd_to_linux_sigmask(p->p_sigmask);
+    return 0;
+}
+
+struct linux_sigsetmask_args {
+    linux_sigset_t mask;
+};
+
+int
+linux_sigsetmask(struct proc *p, struct linux_sigsetmask_args *args,int *retval)
+{
+    int s;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigsetmask(%08x)\n", p->p_pid, args->mask);
+#endif
+    s = splhigh();
+    p->p_sigmask = (linux_to_bsd_sigmask(args->mask) & ~DONTMASK);
+    splx(s);
+    *retval = bsd_to_linux_sigmask(p->p_sigmask);
+    return 0;
+}
+
+struct linux_sigpending_args {
+    linux_sigset_t *mask;
+};
+
+int
+linux_sigpending(struct proc *p, struct linux_sigpending_args *args,int *retval)
+{
+    linux_sigset_t linux_sig;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigpending(*)\n", p->p_pid);
+#endif
+    linux_sig = bsd_to_linux_sigmask(p->p_siglist & p->p_sigmask);
+    return copyout(&linux_sig, args->mask, sizeof(linux_sig));
+}
+
+struct linux_sigsuspend_args {
+    linux_sigset_t mask;
+};
+
+int
+linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args,int *retval)
+{
+    sigset_t tmp;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigsuspend(%08x)\n", p->p_pid, args->mask);
+#endif
+    tmp = linux_to_bsd_sigmask(args->mask);
+    return sigsuspend(p, &tmp , retval);
+}
+
+struct linux_kill_args {
+    int pid;
+    int signum;
+};
+
+int
+linux_kill(struct proc *p, struct linux_kill_args *args, int *retval)
+{
+    struct {
+	int pid;
+	int signum;
+    } tmp;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): kill(%d, %d)\n", 
+	   p->p_pid, args->pid, args->signum);
+#endif
+    tmp.pid = args->pid;
+    tmp.signum = linux_to_bsd_signal[args->signum];
+    return kill(p, &tmp, retval);
+}
diff --git a/sys/compat/linux/linux_socket.c b/sys/compat/linux/linux_socket.c
new file mode 100644
index 0000000..9267063
--- /dev/null
+++ b/sys/compat/linux/linux_socket.c
@@ -0,0 +1,595 @@
+/*-
+ * Copyright (c) 1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_socket.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <netinet/in.h>
+
+
+static int
+linux_to_bsd_domain(int domain)
+{
+    switch (domain) {
+    case LINUX_AF_UNSPEC:
+	return AF_UNSPEC;
+    case LINUX_AF_UNIX:
+	return AF_LOCAL;
+    case LINUX_AF_INET:
+	return AF_INET;
+    case LINUX_AF_AX25:
+	return AF_CCITT;
+    case LINUX_AF_IPX:
+	return AF_IPX;
+    case LINUX_AF_APPLETALK:
+	return AF_APPLETALK;
+    default:
+	return -1;
+    }
+}
+
+static int
+linux_to_bsd_sockopt_level(int level)
+{
+    switch (level) {
+    case LINUX_SOL_SOCKET:
+	return SOL_SOCKET;
+    default:
+	return level;
+    }
+}
+
+static int linux_to_bsd_ip_sockopt(int opt)
+{
+    switch (opt) {
+    case LINUX_IP_TOS:
+	return IP_TOS;
+    case LINUX_IP_TTL:
+	return IP_TTL;
+    default:
+	return -1;
+    }
+}
+
+static int
+linux_to_bsd_so_sockopt(int opt)
+{
+    switch (opt) {
+    case LINUX_SO_DEBUG:
+	return SO_DEBUG;
+    case LINUX_SO_REUSEADDR:
+	return SO_REUSEADDR;
+    case LINUX_SO_TYPE:
+	return SO_TYPE;
+    case LINUX_SO_ERROR:
+	return SO_ERROR;
+    case LINUX_SO_DONTROUTE:
+	return SO_DONTROUTE;
+    case LINUX_SO_BROADCAST:
+	return SO_BROADCAST;
+    case LINUX_SO_SNDBUF:
+	return SO_SNDBUF;
+    case LINUX_SO_RCVBUF:
+	return SO_RCVBUF;
+    case LINUX_SO_KEEPALIVE:
+	return SO_KEEPALIVE;
+    case LINUX_SO_OOBINLINE:
+	return SO_OOBINLINE;
+    case LINUX_SO_LINGER:
+	return SO_LINGER;
+    case LINUX_SO_PRIORITY:
+    case LINUX_SO_NO_CHECK:
+    default:
+	return -1;
+    }
+}
+
+struct linux_socket_args {
+    int domain;
+    int type;
+    int protocol;
+};
+
+static int
+linux_socket(struct proc *p, struct linux_socket_args *args, int *retval)
+{
+    struct linux_socket_args linux_args;
+    struct {
+	int domain;
+	int type;
+	int protocol;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.protocol = linux_args.protocol;
+    bsd_args.type = linux_args.type;
+    bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
+    if (bsd_args.domain == -1)
+	return EINVAL;
+    return socket(p, &bsd_args, retval);
+}
+
+struct linux_bind_args {
+    int s;
+    struct sockaddr *name;
+    int namelen;
+};
+
+static int
+linux_bind(struct proc *p, struct linux_bind_args *args, int *retval)
+{
+    struct linux_bind_args linux_args;
+    struct {
+	int s;
+	caddr_t name;
+	int namelen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.name = (caddr_t)linux_args.name;
+    bsd_args.namelen = linux_args.namelen;
+    return bind(p, &bsd_args, retval);
+}
+
+struct linux_connect_args {
+    int s;
+    struct sockaddr * name;
+    int namelen;
+};
+
+static int
+linux_connect(struct proc *p, struct linux_connect_args *args, int *retval)
+{
+    struct linux_connect_args linux_args;
+    struct {
+	int s;
+	caddr_t name;
+	int namelen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.name = (caddr_t)linux_args.name;
+    bsd_args.namelen = linux_args.namelen;
+    return connect(p, &bsd_args, retval);
+}
+
+struct linux_listen_args {
+    int s;
+    int backlog;
+};
+
+static int
+linux_listen(struct proc *p, struct linux_listen_args *args, int *retval)
+{
+    struct linux_listen_args linux_args;
+    struct {
+	int s;
+	int backlog;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.backlog = linux_args.backlog;
+    return listen(p, &bsd_args, retval);
+}
+
+struct linux_accept_args {
+    int s;
+    struct sockaddr *addr;
+    int *namelen;
+};
+
+static int
+linux_accept(struct proc *p, struct linux_accept_args *args, int *retval)
+{
+    struct linux_accept_args linux_args;
+    struct accept_args {
+	int s;
+	caddr_t name;
+	int *anamelen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.name = (caddr_t)linux_args.addr;
+    bsd_args.anamelen = linux_args.namelen;
+    return oaccept(p, &bsd_args, retval);
+}
+
+struct linux_getsockname_args {
+    int s;
+    struct sockaddr *addr;
+    int *namelen;
+};
+
+static int
+linux_getsockname(struct proc *p, struct linux_getsockname_args *args, int *retval)
+{
+    struct linux_getsockname_args linux_args;
+    struct {
+	int fdes;
+	caddr_t asa;
+	int *alen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.fdes = linux_args.s;
+    bsd_args.asa = (caddr_t) linux_args.addr;
+    bsd_args.alen = linux_args.namelen;
+    return ogetsockname(p, &bsd_args, retval);
+}
+
+struct linux_getpeername_args {
+    int s;
+    struct sockaddr *addr;
+    int *namelen;
+};
+
+static int
+linux_getpeername(struct proc *p, struct linux_getpeername_args *args, int *retval)
+{
+    struct linux_getpeername_args linux_args;
+    struct getpeername_args {
+	int fdes;
+	caddr_t asa;
+	int *alen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.fdes = linux_args.s;
+    bsd_args.asa = (caddr_t) linux_args.addr;
+    bsd_args.alen = linux_args.namelen;
+    return ogetpeername(p, &bsd_args, retval);
+}
+
+struct linux_socketpair_args {
+    int domain;
+    int type;
+    int protocol;
+    int *rsv;
+};
+
+static int
+linux_socketpair(struct proc *p, struct linux_socketpair_args *args, int *retval)
+{
+    struct linux_socketpair_args linux_args;
+    struct {
+	int domain;
+	int type;
+	int protocol;
+	int *rsv;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
+    if (bsd_args.domain == -1)
+	return EINVAL;
+    bsd_args.type = linux_args.type;
+    bsd_args.protocol = linux_args.protocol;
+    bsd_args.rsv = linux_args.rsv;
+    return socketpair(p, &bsd_args, retval);
+}
+
+struct linux_send_args {
+    int s;
+    void *msg;
+    int len;
+    int flags;
+};
+
+static int
+linux_send(struct proc *p, struct linux_send_args *args, int *retval)
+{
+    struct linux_send_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	int len;
+	int flags;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.msg;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    return osend(p, &bsd_args, retval);
+}
+
+struct linux_recv_args {
+    int s;
+    void *msg;
+    int len;
+    int flags;
+};
+
+static int
+linux_recv(struct proc *p, struct linux_recv_args *args, int *retval)
+{
+    struct linux_recv_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	int len;
+	int flags;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.msg;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    return orecv(p, &bsd_args, retval);
+}
+
+struct linux_sendto_args {
+    int s;
+    void *msg;
+    int len;
+    int flags;
+    caddr_t to;
+    int tolen;
+};
+
+static int
+linux_sendto(struct proc *p, struct linux_sendto_args *args, int *retval)
+{
+    struct linux_sendto_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	size_t len;
+	int flags;
+	caddr_t to;
+	int tolen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.msg;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    bsd_args.to = linux_args.to;
+    bsd_args.tolen = linux_args.tolen;
+    return sendto(p, &bsd_args, retval);
+}
+
+struct linux_recvfrom_args {
+    int s;
+    void *buf;
+    int len;
+    int flags;
+    caddr_t from;
+    int *fromlen;
+};
+
+static int
+linux_recvfrom(struct proc *p, struct linux_recvfrom_args *args, int *retval)
+{
+    struct linux_recvfrom_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	size_t len;
+	int flags;
+	caddr_t from;
+	int *fromlenaddr;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.buf;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    bsd_args.from = linux_args.from;
+    bsd_args.fromlenaddr = linux_args.fromlen;
+    return orecvfrom(p, &bsd_args, retval);
+}
+
+struct linux_shutdown_args {
+    int s;
+    int how;
+};
+
+static int
+linux_shutdown(struct proc *p, struct linux_shutdown_args *args, int *retval)
+{
+    struct linux_shutdown_args linux_args;
+    struct {
+	int s;
+	int how;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.how = linux_args.how;
+    return shutdown(p, &bsd_args, retval);
+}
+
+struct linux_setsockopt_args {
+    int s;
+    int level;
+    int optname;
+    void *optval;
+    int optlen;
+};
+
+static int
+linux_setsockopt(struct proc *p, struct linux_setsockopt_args *args, int *retval)
+{
+    struct linux_setsockopt_args linux_args;
+    struct {
+	int s;
+	int level;
+	int name;
+	caddr_t val;
+	int valsize;
+    } bsd_args;
+    int error, name;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
+    switch (bsd_args.level) {
+    case SOL_SOCKET:
+	name = linux_to_bsd_so_sockopt(linux_args.optname);
+	break;
+    case IPPROTO_IP:
+	name = linux_to_bsd_ip_sockopt(linux_args.optname);
+	break;
+    default:
+	return EINVAL;
+    }
+    if (name == -1)
+	return EINVAL;
+    bsd_args.name = name;
+    bsd_args.val = linux_args.optval;
+    bsd_args.valsize = linux_args.optlen;
+    return setsockopt(p, &bsd_args, retval);
+}
+
+struct linux_getsockopt_args {
+    int s;
+    int level;
+    int optname;
+    void *optval;
+    int *optlen;
+};
+
+static int
+linux_getsockopt(struct proc *p, struct linux_getsockopt_args *args, int *retval)
+{
+    struct linux_getsockopt_args linux_args;
+    struct {
+	int s;
+	int level;
+	int name;
+	caddr_t val;
+	int *avalsize;
+    } bsd_args;
+    int error, name;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
+    switch (bsd_args.level) {
+    case SOL_SOCKET:
+	name = linux_to_bsd_so_sockopt(linux_args.optname);
+	break;
+    case IPPROTO_IP:
+	name = linux_to_bsd_ip_sockopt(linux_args.optname);
+	break;
+    default:
+	return EINVAL;
+    }
+    if (name == -1)
+	return EINVAL;
+    bsd_args.val = linux_args.optval;
+    bsd_args.avalsize = linux_args.optlen;
+    return getsockopt(p, &bsd_args, retval);
+}
+
+struct linux_socketcall_args {
+    int what;
+    void *args;
+};
+
+int
+linux_socketcall(struct proc *p, struct linux_socketcall_args *args,int *retval)
+{
+    switch (args->what) {
+    case LINUX_SOCKET:
+	return linux_socket(p, args->args, retval);
+    case LINUX_BIND:
+	return linux_bind(p, args->args, retval);
+    case LINUX_CONNECT:
+	return linux_connect(p, args->args, retval);
+    case LINUX_LISTEN:
+	return linux_listen(p, args->args, retval);
+    case LINUX_ACCEPT:
+	return linux_accept(p, args->args, retval);
+    case LINUX_GETSOCKNAME:
+	return linux_getsockname(p, args->args, retval);
+    case LINUX_GETPEERNAME:
+	return linux_getpeername(p, args->args, retval);
+    case LINUX_SOCKETPAIR:
+	return linux_socketpair(p, args->args, retval);
+    case LINUX_SEND:
+	return linux_send(p, args->args, retval);
+    case LINUX_RECV:
+	return linux_recv(p, args->args, retval);
+    case LINUX_SENDTO:
+	return linux_sendto(p, args->args, retval);
+    case LINUX_RECVFROM:
+	return linux_recvfrom(p, args->args, retval);
+    case LINUX_SHUTDOWN:
+	return linux_shutdown(p, args->args, retval);
+    case LINUX_SETSOCKOPT:
+	return linux_setsockopt(p, args->args, retval);
+    case LINUX_GETSOCKOPT:
+	return linux_getsockopt(p, args->args, retval);
+    default:
+	uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
+	return ENOSYS;
+    }
+}
diff --git a/sys/compat/linux/linux_stats.c b/sys/compat/linux/linux_stats.c
new file mode 100644
index 0000000..1dbfcf1
--- /dev/null
+++ b/sys/compat/linux/linux_stats.c
@@ -0,0 +1,273 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_stats.c,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/dirent.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/proc.h>
+#include <sys/mount.h>
+#include <sys/namei.h>
+#include <sys/stat.h>
+#include <sys/vnode.h>
+
+#include <machine/cpu.h>
+#include <machine/psl.h>
+#include <machine/reg.h>
+
+#include <i386/linux/linux.h>
+
+struct linux_newstat {
+    unsigned short stat_dev;
+    unsigned short __pad1;
+    unsigned long stat_ino;
+    unsigned short stat_mode;
+    unsigned short stat_nlink;
+    unsigned short stat_uid;
+    unsigned short stat_gid;
+    unsigned short stat_rdev;
+    unsigned short __pad2;
+    unsigned long stat_size;
+    unsigned long stat_blksize;
+    unsigned long stat_blocks;
+    unsigned long stat_atime;
+    unsigned long __unused1;
+    unsigned long stat_mtime;
+    unsigned long __unused2;
+    unsigned long stat_ctime;
+    unsigned long __unused3;
+    unsigned long __unused4;
+    unsigned long __unused5;
+};
+
+struct linux_newstat_args {
+    char *path;
+    struct linux_newstat *buf;
+};
+
+static int
+newstat_copyout(struct stat *buf, void *ubuf)
+{
+    struct linux_newstat tbuf;
+
+    tbuf.stat_dev = (buf->st_dev & 0xff) | ((buf->st_dev & 0xff00)<<10);
+    tbuf.stat_ino = buf->st_ino;
+    tbuf.stat_mode = buf->st_mode;
+    tbuf.stat_nlink = buf->st_nlink;
+    tbuf.stat_uid = buf->st_uid;
+    tbuf.stat_gid = buf->st_gid;
+    tbuf.stat_rdev = buf->st_rdev;
+    tbuf.stat_size = buf->st_size;
+    tbuf.stat_atime = buf->st_atime;
+    tbuf.stat_mtime = buf->st_mtime;
+    tbuf.stat_ctime = buf->st_ctime;
+    tbuf.stat_blksize = buf->st_blksize;
+    tbuf.stat_blocks = buf->st_blocks;
+    return copyout(&tbuf, ubuf, sizeof(tbuf));
+}
+
+int
+linux_newstat(struct proc *p, struct linux_newstat_args *args, int *retval)
+{
+    struct stat buf;
+    struct linux_newstat tbuf;
+    struct nameidata nd;
+    int error;
+  
+#ifdef DEBUG
+    printf("Linux-emul(%d): newstat(%s, *)\n", p->p_pid, args->path);
+#endif
+    NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
+    error = namei(&nd);
+    if (!error) {
+	error = vn_stat(nd.ni_vp, &buf, p);
+	vput(nd.ni_vp);
+    }
+    if (!error) 
+	error = newstat_copyout(&buf, args->buf);
+    return error;
+}
+
+int
+linux_newlstat(struct proc *p, struct linux_newstat_args *args, int *retval)
+{
+    struct stat buf;
+    struct linux_newstat tbuf;
+    struct nameidata nd;
+    int error;
+  
+#ifdef DEBUG
+    printf("Linux-emul(%d): newlstat(%s, *)\n", p->p_pid, args->path);
+#endif
+    NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
+    error = namei(&nd);
+    if (!error) {
+	error = vn_stat(nd.ni_vp, &buf, p);
+	vput(nd.ni_vp);
+    }
+    if (!error)
+	error = newstat_copyout(&buf, args->buf);
+    return error;
+}
+
+struct linux_newfstat_args {
+    int fd;
+    struct linux_newstat *buf;
+};
+
+int
+linux_newfstat(struct proc *p, struct linux_newfstat_args *args, int *retval)
+{
+    struct linux_newstat tbuf;
+    struct filedesc *fdp = p->p_fd;
+    struct file *fp;
+    struct stat buf;
+    int error;
+  
+#ifdef DEBUG
+    printf("Linux-emul(%d): newlstat(%d, *)\n", p->p_pid, args->fd);
+#endif
+    if ((unsigned)args->fd >= fdp->fd_nfiles 
+	|| (fp = fdp->fd_ofiles[args->fd]) == NULL)
+	return EBADF;
+    switch (fp->f_type) {
+    case DTYPE_VNODE:
+	error = vn_stat((struct vnode *)fp->f_data, &buf, p);
+	break;
+    case DTYPE_SOCKET:
+	error = soo_stat((struct socket *)fp->f_data, &buf);
+	break;
+    default:
+	panic("LINUX newfstat");
+    }
+    if (!error)
+	error = newstat_copyout(&buf, args->buf);
+    return error;
+}
+
+struct linux_statfs {
+	long ftype;
+	long fbsize;
+	long fblocks;
+	long fbfree;
+	long fbavail;
+	long ffiles;
+	long fffree;
+	linux_fsid_t ffsid;
+	long fnamelen;
+	long fspare[6];
+};
+
+
+struct linux_statfs_args {
+	char *path;
+	struct statfs *buf;
+};
+
+int
+linux_statfs(struct proc *p, struct linux_statfs_args *args, int *retval)
+{
+	struct mount *mp;
+	struct nameidata *ndp;
+	struct statfs *bsd_statfs;
+	struct nameidata nd;
+	struct linux_statfs linux_statfs;
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
+#endif
+	ndp = &nd;
+  	ndp->ni_cnd.cn_nameiop = LOOKUP;
+	ndp->ni_cnd.cn_flags = FOLLOW;
+	ndp->ni_cnd.cn_proc = curproc;
+	ndp->ni_cnd.cn_cred = curproc->p_cred->pc_ucred;
+	ndp->ni_segflg = UIO_USERSPACE;
+	ndp->ni_dirp = args->path;
+	if (error = namei(ndp))
+		return error;
+	mp = ndp->ni_vp->v_mount;
+	bsd_statfs = &mp->mnt_stat;
+	vrele(ndp->ni_vp);
+	if (error = VFS_STATFS(mp, bsd_statfs, p))
+		return error;
+	bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
+	linux_statfs.ftype = bsd_statfs->f_type;
+	linux_statfs.fbsize = bsd_statfs->f_bsize;
+	linux_statfs.fblocks = bsd_statfs->f_blocks;
+	linux_statfs.fbfree = bsd_statfs->f_bfree;
+	linux_statfs.fbavail = bsd_statfs->f_bavail;
+  	linux_statfs.fffree = bsd_statfs->f_ffree;
+	linux_statfs.ffiles = bsd_statfs->f_files;
+	linux_statfs.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
+	linux_statfs.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
+	linux_statfs.fnamelen = MAXNAMLEN;
+	return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf,
+		       sizeof(struct linux_statfs));
+}
+
+struct linux_fstatfs_args {
+	int fd;
+	struct statfs *buf;
+};
+
+int
+linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args, int *retval)
+{
+	struct file *fp;
+	struct mount *mp;
+	struct statfs *bsd_statfs;
+	struct linux_statfs linux_statfs;
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
+#endif
+	if (error = getvnode(p->p_fd, args->fd, &fp))
+		return error;
+	mp = ((struct vnode *)fp->f_data)->v_mount;
+	bsd_statfs = &mp->mnt_stat;
+	if (error = VFS_STATFS(mp, bsd_statfs, p))
+		return error;
+	bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
+	linux_statfs.ftype = bsd_statfs->f_type;
+	linux_statfs.fbsize = bsd_statfs->f_bsize;
+	linux_statfs.fblocks = bsd_statfs->f_blocks;
+	linux_statfs.fbfree = bsd_statfs->f_bfree;
+	linux_statfs.fbavail = bsd_statfs->f_bavail;
+  	linux_statfs.fffree = bsd_statfs->f_ffree;
+	linux_statfs.ffiles = bsd_statfs->f_files;
+	linux_statfs.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
+	linux_statfs.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
+	linux_statfs.fnamelen = MAXNAMLEN;
+	return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf,
+		       sizeof(struct linux_statfs));
+}
diff --git a/sys/i386/linux/imgact_linux.c b/sys/i386/linux/imgact_linux.c
new file mode 100644
index 0000000..d9650d3
--- /dev/null
+++ b/sys/i386/linux/imgact_linux.c
@@ -0,0 +1,235 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * All rights reserved.
+ *
+ * Based heavily on /sys/kern/imgact_aout.c which is:
+ * Copyright (c) 1993, David Greenman
+ *
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *	$Id: imgact_linux.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/resourcevar.h>
+#include <sys/exec.h>
+#include <sys/mman.h>
+#include <sys/imgact.h>
+#include <sys/imgact_aout.h>
+#include <sys/kernel.h>
+#include <sys/sysent.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+
+int
+exec_linux_imgact(iparams)
+    struct image_params *iparams;
+{
+    struct exec *a_out = (struct exec *) iparams->image_header;
+    struct vmspace *vmspace = iparams->proc->p_vmspace;
+    unsigned long vmaddr, virtual_offset, file_offset;
+    unsigned long buffer, bss_size;
+    int error;
+    extern struct sysentvec linux_sysvec;
+
+    if (((a_out->a_magic >> 16) & 0xff) != 0x64)
+	return -1;
+
+    /*
+     * Set file/virtual offset based on a.out variant.
+     */
+    switch ((int)(a_out->a_magic & 0xffff)) {
+    case 0413:
+	virtual_offset = 0;
+	file_offset = 1024;
+	break;
+    case 0314:
+	virtual_offset = 4096;
+	file_offset = 0;
+	break;
+    default:
+	return (-1);
+    }
+    bss_size = round_page(a_out->a_bss);
+
+    /*
+     * Check various fields in header for validity/bounds.
+     */
+    if (a_out->a_entry < virtual_offset ||
+	a_out->a_entry >= virtual_offset + a_out->a_text ||
+	a_out->a_text % NBPG || a_out->a_data % NBPG)
+	return (-1);
+
+    /* text + data can't exceed file size */
+    if (a_out->a_data + a_out->a_text > iparams->attr->va_size)
+	return (EFAULT);
+    /*
+     * text/data/bss must not exceed limits
+     */
+    if (a_out->a_text > MAXTSIZ || a_out->a_data + bss_size > MAXDSIZ ||
+	a_out->a_data+bss_size > iparams->proc->p_rlimit[RLIMIT_DATA].rlim_cur)
+	return (ENOMEM);
+
+    /* copy in arguments and/or environment from old process */
+    error = exec_extract_strings(iparams);
+    if (error)
+	return (error);
+
+    /*
+     * Destroy old process VM and create a new one (with a new stack)
+     */
+    exec_new_vmspace(iparams);
+
+    /*
+     * Check if file_offset page aligned,.
+     * Currently we cannot handle misalinged file offsets,
+     * and so we read in the entire image (what a waste).
+     */
+    if (file_offset & PGOFSET) {
+#ifdef DEBUG
+	printf("imgact: Non page aligned binary %d\n", file_offset);
+#endif
+	/*
+	 * Map text read/execute
+	 */
+	vmaddr = virtual_offset;
+	error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
+		    	    round_page(a_out->a_text), FALSE);
+	if (error)
+	    return error;
+
+	error = vm_mmap(kernel_map, &buffer,
+			round_page(a_out->a_text + file_offset),
+			VM_PROT_READ, VM_PROT_READ, MAP_FILE,
+			(caddr_t) iparams->vnodep, trunc_page(file_offset));
+	if (error)
+	    return error;
+
+	error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr, 
+			a_out->a_text);
+	if (error)
+	    return error;
+
+	vm_map_remove(kernel_map, trunc_page(vmaddr),
+		      round_page(a_out->a_text + file_offset));
+
+	error = vm_map_protect(&vmspace->vm_map, vmaddr,
+		   	       round_page(a_out->a_text),
+		   	       VM_PROT_EXECUTE|VM_PROT_READ, TRUE);
+	if (error)
+	    return error;
+	/*
+	 * Map data read/write 
+	 */
+	vmaddr = virtual_offset + a_out->a_text;
+	error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
+		      	    round_page(a_out->a_data + bss_size), FALSE);
+	if (error)
+	    return error;
+
+	error = vm_mmap(kernel_map, &buffer,
+			round_page(a_out->a_data + file_offset),
+			VM_PROT_READ, VM_PROT_READ, MAP_FILE,
+			(caddr_t) iparams->vnodep,
+			trunc_page(a_out->a_text + file_offset));
+	if (error)
+	    return error;
+
+	error = copyout((caddr_t)(buffer + file_offset), 
+			(caddr_t)vmaddr, 
+			a_out->a_data);
+	if (error)
+	    return error;
+
+	vm_map_remove(kernel_map, trunc_page(vmaddr),
+		      round_page(a_out->a_data + file_offset));
+
+	error = vm_map_protect(&vmspace->vm_map, vmaddr,
+		   	       round_page(a_out->a_data + bss_size),
+		   	       VM_PROT_WRITE|VM_PROT_READ, TRUE);
+	if (error)
+	    return error;
+    }
+    else {
+#ifdef DEBUG
+	printf("imgact: Page aligned binary %d\n", file_offset);
+#endif
+	/*
+	 * Map text read/execute
+	 */
+	vmaddr = virtual_offset;
+	error = vm_mmap(&vmspace->vm_map, &vmaddr, a_out->a_text,
+	    		VM_PROT_READ | VM_PROT_EXECUTE,
+	    		VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_WRITE,
+	    		MAP_PRIVATE | MAP_FIXED,
+	    		(caddr_t)iparams->vnodep, file_offset);
+	if (error)
+	    return (error);
+    
+	/*
+	 * Map data read/write 
+	 */
+	vmaddr = virtual_offset + a_out->a_text;
+	error = vm_mmap(&vmspace->vm_map, &vmaddr, a_out->a_data,
+			VM_PROT_READ | VM_PROT_WRITE,
+			VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED,
+			(caddr_t)iparams->vnodep, file_offset + a_out->a_text);
+	if (error)
+	    return (error);
+    
+	/*
+	 * Allocate demand-zeroed area for uninitialized data
+	 */
+	if (bss_size != 0) {
+	    vmaddr = virtual_offset + a_out->a_text + a_out->a_data;
+	    error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, 
+				bss_size, FALSE);
+	    if (error)
+		return (error);
+	}
+    }
+    /* Fill in process VM information */
+    vmspace->vm_tsize = round_page(a_out->a_text) >> PAGE_SHIFT;
+    vmspace->vm_dsize = round_page(a_out->a_data + bss_size) >> PAGE_SHIFT;
+    vmspace->vm_taddr = (caddr_t)virtual_offset;
+    vmspace->vm_daddr = (caddr_t)virtual_offset + a_out->a_text;
+
+    /* Fill in image_params */
+    iparams->interpreted = 0;
+    iparams->entry_addr = a_out->a_entry;
+    
+    iparams->proc->p_sysent = &linux_sysvec;
+    return (0);
+}
+
+/*
+ * Tell kern_execve.c about it, with a little help from the linker.
+ * Since `const' objects end up in the text segment, TEXT_SET is the
+ * correct directive to use.
+ */
+const struct execsw linux_execsw = { exec_linux_imgact, "linux" };
+TEXT_SET(execsw_set, linux_execsw);
+
diff --git a/sys/i386/linux/linux.h b/sys/i386/linux/linux.h
new file mode 100644
index 0000000..9d13bd1
--- /dev/null
+++ b/sys/i386/linux/linux.h
@@ -0,0 +1,406 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *	$Id: linux.h,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#ifndef LINUX_H
+#define LINUX_H
+
+typedef unsigned short linux_uid_t;
+typedef unsigned short linux_gid_t;
+typedef unsigned short linux_dev_t;
+typedef unsigned long linux_ino_t;
+typedef unsigned short linux_mode_t;
+typedef unsigned short linux_nlink_t;
+typedef long linux_time_t;
+typedef long linux_clock_t;
+typedef char * linux_caddr_t;
+typedef long linux_off_t;
+typedef struct {
+	long val[2];
+} linux_fsid_t;
+typedef int linux_pid_t;
+typedef unsigned long linux_sigset_t;
+typedef void (*linux_handler_t)(int);
+typedef struct {
+	void (*sa_handler)(int);
+	linux_sigset_t sa_mask;
+	unsigned long sa_flags;
+	void (*sa_restorer)(void);
+} linux_sigaction_t;
+typedef int linux_key_t;
+
+extern int bsd_to_linux_signal[];
+extern int linux_to_bsd_signal[];
+
+/* misc defines */
+#define LINUX_NAME_MAX		255
+
+/* signal numbers */
+#define LINUX_SIGHUP		 1
+#define LINUX_SIGINT		 2
+#define LINUX_SIGQUIT		 3
+#define LINUX_SIGILL		 4
+#define LINUX_SIGTRAP		 5
+#define LINUX_SIGABRT		 6
+#define LINUX_SIGIOT		 6
+#define LINUX_SIGUNUSED	 	 7
+#define LINUX_SIGFPE		 8
+#define LINUX_SIGKILL		 9
+#define LINUX_SIGUSR1		10
+#define LINUX_SIGSEGV		11
+#define LINUX_SIGUSR2		12
+#define LINUX_SIGPIPE		13
+#define LINUX_SIGALRM		14
+#define LINUX_SIGTERM		15
+#define LINUX_SIGSTKFLT		16
+#define LINUX_SIGCHLD		17
+#define LINUX_SIGCONT		18
+#define LINUX_SIGSTOP		19
+#define LINUX_SIGTSTP		20
+#define LINUX_SIGTTIN		21
+#define LINUX_SIGTTOU		22
+#define LINUX_SIGIO		23
+#define LINUX_SIGPOLL		LINUX_SIGIO
+#define LINUX_SIGURG		LINUX_SIGIO
+#define LINUX_SIGXCPU		24
+#define LINUX_SIGXFSZ		25
+#define LINUX_SIGVTALRM		26
+#define LINUX_SIGPROF		27
+#define LINUX_SIGWINCH		28
+#define LINUX_SIGLOST		29
+#define LINUX_SIGPWR		30
+#define LINUX_SIGBUS		LINUX_SIGUNUSED
+#define LINUX_NSIG		32
+
+/* sigaction flags */
+#define LINUX_SA_NOCLDSTOP	0x00000001
+#define LINUX_SA_ONSTACK	0x08000000
+#define LINUX_SA_RESTART	0x10000000
+#define LINUX_SA_INTERRUPT	0x20000000
+#define LINUX_SA_NOMASK		0x40000000
+#define LINUX_SA_ONESHOT	0x80000000
+
+/* sigprocmask actions */
+#define LINUX_SIG_BLOCK		0
+#define LINUX_SIG_UNBLOCK	1
+#define LINUX_SIG_SETMASK	2
+
+/* termio commands */
+#define LINUX_TCGETS		0x5401
+#define LINUX_TCSETS		0x5402
+#define LINUX_TCSETSW		0x5403
+#define LINUX_TCSETSF		0x5404
+#define LINUX_TCGETA		0x5405
+#define LINUX_TCSETA		0x5406
+#define LINUX_TCSETAW		0x5407
+#define LINUX_TCSETAF		0x5408
+#define LINUX_TCSBRK		0x5409
+#define LINUX_TCXONC		0x540A
+#define LINUX_TCFLSH		0x540B
+#define LINUX_TIOCEXCL		0x540C
+#define LINUX_TIOCNXCL		0x540D
+#define LINUX_TIOCSCTTY		0x540E
+#define LINUX_TIOCGPGRP		0x540F
+#define LINUX_TIOCSPGRP		0x5410
+#define LINUX_TIOCOUTQ		0x5411
+#define LINUX_TIOCSTI		0x5412
+#define LINUX_TIOCGWINSZ	0x5413
+#define LINUX_TIOCSWINSZ	0x5414
+#define LINUX_TIOCMGET		0x5415
+#define LINUX_TIOCMBIS		0x5416
+#define LINUX_TIOCMBIC		0x5417
+#define LINUX_TIOCMSET		0x5418
+#define LINUX_TIOCGSOFTCAR	0x5419
+#define LINUX_TIOCSSOFTCAR	0x541A
+#define LINUX_FIONREAD		0x541B
+#define LINUX_TIOCINQ		FIONREAD
+#define LINUX_TIOCLINUX		0x541C
+#define LINUX_TIOCCONS		0x541D
+#define LINUX_TIOCGSERIAL	0x541E
+#define LINUX_TIOCSSERIAL	0x541F
+#define LINUX_TIOCPKT		0x5420
+#define LINUX_FIONBIO		0x5421
+#define LINUX_TIOCNOTTY		0x5422
+#define LINUX_TIOCSETD		0x5423
+#define LINUX_TIOCGETD		0x5424
+#define LINUX_TCSBRKP		0x5425
+#define LINUX_TIOCTTYGSTRUCT	0x5426
+#define LINUX_FIONCLEX		0x5450
+#define LINUX_FIOCLEX		0x5451
+#define LINUX_FIOASYNC		0x5452
+#define LINUX_TIOCSERCONFIG	0x5453
+#define LINUX_TIOCSERGWILD	0x5454
+#define LINUX_TIOCSERSWILD	0x5455
+#define LINUX_TIOCGLCKTRMIOS	0x5456
+#define LINUX_TIOCSLCKTRMIOS	0x5457
+
+/* line disciplines */
+#define LINUX_N_TTY		0
+#define LINUX_N_SLIP		1
+#define LINUX_N_MOUSE		2
+#define LINUX_N_PPP		3
+
+/* Linux termio c_cc values */
+#define LINUX_VINTR		0
+#define LINUX_VQUIT		1
+#define LINUX_VERASE		2
+#define LINUX_VKILL		3
+#define LINUX_VEOF		4
+#define LINUX_VTIME		5
+#define LINUX_VMIN		6
+#define LINUX_VSWTC		7
+#define LINUX_NCC		8
+
+/* Linux termios c_cc values */
+#define LINUX_VSTART		8
+#define LINUX_VSTOP		9
+#define LINUX_VSUSP 		10
+#define LINUX_VEOL		11
+#define LINUX_VREPRINT		12
+#define LINUX_VDISCARD		13
+#define LINUX_VWERASE		14
+#define LINUX_VLNEXT		15
+#define LINUX_VEOL2		16
+#define LINUX_NCCS		17
+
+/* Linux c_iflag masks */
+#define LINUX_IGNBRK		0x0000001
+#define LINUX_BRKINT		0x0000002
+#define LINUX_IGNPAR		0x0000004
+#define LINUX_PARMRK		0x0000008
+#define LINUX_INPCK		0x0000010
+#define LINUX_ISTRIP		0x0000020
+#define LINUX_INLCR		0x0000040
+#define LINUX_IGNCR		0x0000080
+#define LINUX_ICRNL		0x0000100
+#define LINUX_IUCLC		0x0000200
+#define LINUX_IXON		0x0000400
+#define LINUX_IXANY		0x0000800
+#define LINUX_IXOFF		0x0001000
+#define LINUX_IMAXBEL		0x0002000
+
+/* Linux c_oflag masks */
+#define LINUX_OPOST		0x0000001
+#define LINUX_OLCUC		0x0000002
+#define LINUX_ONLCR		0x0000004
+#define LINUX_OCRNL		0x0000008
+#define LINUX_ONOCR		0x0000010
+#define LINUX_ONLRET		0x0000020
+#define LINUX_OFILL		0x0000040
+#define LINUX_OFDEL		0x0000080
+#define LINUX_NLDLY		0x0000100
+
+#define LINUX_NL0		0x0000000
+#define LINUX_NL1		0x0000100
+#define LINUX_CRDLY		0x0000600
+#define LINUX_CR0		0x0000000
+#define LINUX_CR1		0x0000200
+#define LINUX_CR2		0x0000400
+#define LINUX_CR3		0x0000600
+#define LINUX_TABDLY		0x0001800
+#define LINUX_TAB0		0x0000000
+#define LINUX_TAB1		0x0000800
+#define LINUX_TAB2		0x0001000
+#define LINUX_TAB3		0x0001800
+#define LINUX_XTABS		0x0001800
+#define LINUX_BSDLY		0x0002000
+#define LINUX_BS0		0x0000000
+#define LINUX_BS1		0x0002000
+#define LINUX_VTDLY		0x0004000
+#define LINUX_VT0		0x0000000
+#define LINUX_VT1		0x0004000
+#define LINUX_FFDLY		0x0008000
+#define LINUX_FF0		0x0000000
+#define LINUX_FF1		0x0008000
+
+#define LINUX_CBAUD		0x0000100f
+#define LINUX_B0		0x00000000
+#define LINUX_B50		0x00000001
+#define LINUX_B75		0x00000002
+#define LINUX_B110		0x00000003
+#define LINUX_B134		0x00000004
+#define LINUX_B150		0x00000005
+#define LINUX_B200		0x00000006
+#define LINUX_B300		0x00000007
+#define LINUX_B600		0x00000008
+#define LINUX_B1200		0x00000009
+#define LINUX_B1800		0x0000000a
+#define LINUX_B2400		0x0000000b
+#define LINUX_B4800		0x0000000c
+#define LINUX_B9600		0x0000000d
+#define LINUX_B19200		0x0000000e
+#define LINUX_B38400		0x0000000f
+#define LINUX_EXTA		LINUX_B19200
+#define LINUX_EXTB		LINUX_B38400
+#define LINUX_CBAUDEX		0x00001000
+#define LINUX_B57600		0x00001001
+#define LINUX_B115200		0x00001002
+
+#define LINUX_CSIZE		0x00000030
+#define LINUX_CS5		0x00000000
+#define LINUX_CS6		0x00000010
+#define LINUX_CS7		0x00000020
+#define LINUX_CS8		0x00000030
+#define LINUX_CSTOPB		0x00000040
+#define LINUX_CREAD		0x00000080
+#define LINUX_PARENB		0x00000100
+#define LINUX_PARODD		0x00000200
+#define LINUX_HUPCL		0x00000400
+#define LINUX_CLOCAL		0x00000800
+#define LINUX_CRTSCTS		0x80000000
+
+/* Linux c_lflag masks */
+#define LINUX_ISIG		0x00000001
+#define LINUX_ICANON		0x00000002
+#define LINUX_XCASE		0x00000004
+#define LINUX_ECHO		0x00000008
+#define LINUX_ECHOE		0x00000010
+#define LINUX_ECHOK		0x00000020
+#define LINUX_ECHONL		0x00000040
+#define LINUX_NOFLSH		0x00000080
+#define LINUX_TOSTOP		0x00000100
+#define LINUX_ECHOCTL		0x00000200
+#define LINUX_ECHOPRT		0x00000400
+#define LINUX_ECHOKE		0x00000800
+#define LINUX_FLUSHO		0x00001000
+#define LINUX_PENDIN		0x00002000
+#define LINUX_IEXTEN		0x00008000
+
+/* open/fcntl flags */
+#define LINUX_O_RDONLY		00
+#define LINUX_O_WRONLY		01
+#define LINUX_O_RDWR		02
+#define LINUX_O_CREAT		0100
+#define LINUX_O_EXCL		0200
+#define LINUX_O_NOCTTY		0400
+#define LINUX_O_TRUNC		01000
+#define LINUX_O_APPEND		02000
+#define LINUX_O_NONBLOCK	04000
+#define LINUX_O_NDELAY		LINUX_O_NONBLOCK
+#define LINUX_O_SYNC		010000
+#define LINUX_FASYNC		020000
+
+/* fcntl flags */
+#define LINUX_F_DUPFD		0
+#define LINUX_F_GETFD		1
+#define LINUX_F_SETFD		2
+#define LINUX_F_GETFL		3
+#define LINUX_F_SETFL		4
+#define LINUX_F_GETLK		5
+#define LINUX_F_SETLK		6
+#define LINUX_F_SETLKW		7
+#define LINUX_F_SETOWN		8
+#define LINUX_F_GETOWN		9
+
+#define LINUX_F_RDLCK		0
+#define LINUX_F_WRLCK		1
+#define LINUX_F_UNLCK		2
+
+/* mmap options */
+#define LINUX_MAP_SHARED	0x0001
+#define LINUX_MAP_PRIVATE	0x0002
+#define LINUX_MAP_FIXED		0x0010
+#define LINUX_MAP_ANON		0x0020
+
+/* SystemV ipc defines */
+#define LINUX_SEMOP		1
+#define LINUX_SEMGET		2
+#define LINUX_SEMCTL		3
+#define LINUX_MSGSND		11
+#define LINUX_MSGRCV		12
+#define LINUX_MSGGET		13
+#define LINUX_MSGCTL		14
+#define LINUX_SHMAT		21
+#define LINUX_SHMDT		22
+#define LINUX_SHMGET		23
+#define LINUX_SHMCTL		24
+
+#define LINUX_IPC_RMID		0
+#define LINUX_IPC_SET		1
+#define LINUX_IPC_STAT		2
+#define LINUX_IPC_INFO		3
+
+#define LINUX_SHM_LOCK		11
+#define LINUX_SHM_UNLOCK	12
+#define LINUX_SHM_STAT		13
+#define LINUX_SHM_INFO		14
+
+#define LINUX_SHM_RDONLY	0x1000
+#define LINUX_SHM_RND		0x2000
+#define LINUX_SHM_REMAP		0x4000
+
+/* Socket defines */
+#define LINUX_SOCKET 		1
+#define LINUX_BIND		2
+#define LINUX_CONNECT 		3
+#define LINUX_LISTEN 		4
+#define LINUX_ACCEPT 		5
+#define LINUX_GETSOCKNAME	6
+#define LINUX_GETPEERNAME	7
+#define LINUX_SOCKETPAIR	8
+#define LINUX_SEND		9
+#define LINUX_RECV		10
+#define LINUX_SENDTO 		11
+#define LINUX_RECVFROM 		12
+#define LINUX_SHUTDOWN 		13
+#define LINUX_SETSOCKOPT	14
+#define LINUX_GETSOCKOPT	15
+
+#define LINUX_AF_UNSPEC		0
+#define LINUX_AF_UNIX		1
+#define LINUX_AF_INET		2
+#define LINUX_AF_AX25		3
+#define LINUX_AF_IPX		4
+#define LINUX_AF_APPLETALK	5
+
+#define LINUX_SOL_SOCKET	1
+#define LINUX_SOL_IP		0
+#define LINUX_SOL_IPX		256
+#define LINUX_SOL_AX25		257
+#define LINUX_SOL_TCP		6
+#define LINUX_SOL_UDP		17
+
+#define LINUX_SO_DEBUG		1
+#define LINUX_SO_REUSEADDR	2
+#define LINUX_SO_TYPE		3
+#define LINUX_SO_ERROR		4
+#define LINUX_SO_DONTROUTE	5
+#define LINUX_SO_BROADCAST	6
+#define LINUX_SO_SNDBUF		7
+#define LINUX_SO_RCVBUF		8
+#define LINUX_SO_KEEPALIVE	9
+#define LINUX_SO_OOBINLINE	10
+#define LINUX_SO_NO_CHECK	11
+#define LINUX_SO_PRIORITY	12
+#define LINUX_SO_LINGER		13
+
+#define LINUX_IP_TOS		1
+#define LINUX_IP_TTL		2
+
+#endif /* LINUX_H */
diff --git a/sys/i386/linux/linux_dummy.c b/sys/i386/linux/linux_dummy.c
new file mode 100644
index 0000000..13288ac
--- /dev/null
+++ b/sys/i386/linux/linux_dummy.c
@@ -0,0 +1,316 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_dummy.c,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/resourcevar.h>
+#include <sys/errno.h>
+#include <vm/vm.h>
+
+int
+linux_setup(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): setup() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_break(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): break() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_stat(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): stat() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_fstat(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): fstat() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_mount(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): mount() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_umount(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): umount() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_stime(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): stime() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ptrace(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ptrace() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_pause(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): pause() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_stty(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): stty() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_gtty(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): gtty() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_nice(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): nice() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ftime(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ftime() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_prof(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): prof() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_signal(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): signal() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_phys(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): phys() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_lock(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): lock() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_mpx(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): mpx() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ulimit(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ulimit() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_olduname(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): olduname() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ustat(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ustat() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_ioperm(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): ioperm() not supported\n", p->p_pid);
+    return 0; /* EINVAL SOS XXX */
+}
+
+int
+linux_syslog(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): syslog() not supported (BSD sigreturn)\n",p->p_pid);
+    return sigreturn(p, args, retval);
+}
+
+int
+linux_iopl(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): iopl() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_vhangup(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): vhangup() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_idle(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): idle() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_vm86(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): vm86() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_swapoff(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): swapoff() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_sysinfo(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): sysinfo() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_sigreturn(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): sigreturn() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_clone(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): clone() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_uname(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): uname() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_modify_ldt(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): modify_ldt() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_adjtimex(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): adjtimex() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_create_module(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): create_module() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_init_module(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): init_module() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_delete_module(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): delete_module() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_get_kernel_syms(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): get_kernel_syms() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_quotactl(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): quotactl() not supported\n", p->p_pid);
+    return ENOSYS;
+}
+
+int
+linux_bdflush(struct proc *p, void *args, int *retval)
+{
+    printf("Linux-emul(%d): bdflush() not supported\n", p->p_pid);
+    return ENOSYS;
+}
diff --git a/sys/i386/linux/linux_file.c b/sys/i386/linux/linux_file.c
new file mode 100644
index 0000000..b846068
--- /dev/null
+++ b/sys/i386/linux/linux_file.c
@@ -0,0 +1,436 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_file.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/exec.h>
+#include <sys/dirent.h>
+#include <vm/vm.h>
+#include <ufs/ufs/dir.h>
+
+
+struct linux_creat_args {
+    char    *path;
+    int mode;
+};
+
+int
+linux_creat(struct proc *p, struct linux_creat_args *args, int *retval)
+{
+    struct {
+	char *path;
+	int flags;
+	int mode;
+    } bsd_open_args;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): creat(%s, %d)\n", 
+	   p->p_pid, args->path, args->mode);
+#endif
+    bsd_open_args.path = args->path;
+    bsd_open_args.mode = args->mode;
+    bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
+    return open(p, &bsd_open_args, retval);
+}
+
+struct linux_open_args {
+    char *path;
+    int flags;
+    int mode;
+};
+
+int
+linux_open(struct proc *p, struct linux_open_args *args, int *retval)
+{
+    struct {
+	char *path;
+	int flags;
+	int mode;
+    } bsd_open_args;
+    int error;
+    
+#ifdef DEBUG
+    printf("Linux-emul(%d): open(%s, 0x%x, 0x%x)\n", 
+	   p->p_pid, args->path, args->flags, args->mode);
+#endif
+    bsd_open_args.flags = 0;
+    if (args->flags & LINUX_O_RDONLY)
+	bsd_open_args.flags |= O_RDONLY;
+    if (args->flags & LINUX_O_WRONLY) 
+	bsd_open_args.flags |= O_WRONLY;
+    if (args->flags & LINUX_O_RDWR)
+	bsd_open_args.flags |= O_RDWR;
+    if (args->flags & LINUX_O_NDELAY)
+	bsd_open_args.flags |= O_NONBLOCK;
+    if (args->flags & LINUX_O_APPEND)
+	bsd_open_args.flags |= O_APPEND;
+    if (args->flags & LINUX_O_SYNC)
+	bsd_open_args.flags |= O_FSYNC;
+    if (args->flags & LINUX_O_NONBLOCK)
+	bsd_open_args.flags |= O_NONBLOCK;
+    if (args->flags & LINUX_FASYNC)
+	bsd_open_args.flags |= O_ASYNC;
+    if (args->flags & LINUX_O_CREAT)
+	bsd_open_args.flags |= O_CREAT;
+    if (args->flags & LINUX_O_TRUNC)
+	bsd_open_args.flags |= O_TRUNC;
+    if (args->flags & LINUX_O_EXCL)
+	bsd_open_args.flags |= O_EXCL;
+    if (args->flags & LINUX_O_NOCTTY)
+	bsd_open_args.flags |= O_NOCTTY;
+    bsd_open_args.path = args->path;
+    bsd_open_args.mode = args->mode;
+
+    error = open(p, &bsd_open_args, retval);
+    if (!error && !(bsd_open_args.flags & O_NOCTTY) && 
+	SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
+	struct filedesc *fdp = p->p_fd;
+	struct file *fp = fdp->fd_ofiles[*retval];
+
+	if (fp->f_type == DTYPE_VNODE)
+	    (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
+    }
+    return error;
+}
+
+struct linux_flock {
+    short l_type;
+    short l_whence;
+    linux_off_t l_start;
+    linux_off_t l_len;
+    linux_pid_t l_pid;
+};
+
+static void
+linux_to_bsd_flock(struct linux_flock *linux_flock, struct flock *bsd_flock)
+{
+    switch (linux_flock->l_type) {
+    case LINUX_F_RDLCK:
+	bsd_flock->l_type = F_RDLCK;
+	break;
+    case LINUX_F_WRLCK:
+	bsd_flock->l_type = F_WRLCK;
+	break;
+    case LINUX_F_UNLCK:
+	bsd_flock->l_type = F_UNLCK;
+	break;
+    }
+    bsd_flock->l_whence = linux_flock->l_whence;
+    bsd_flock->l_start = (off_t)linux_flock->l_start;
+    bsd_flock->l_len = (off_t)linux_flock->l_len;
+    bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
+}
+
+static void
+bsd_to_linux_flock(struct flock *bsd_flock, struct linux_flock *linux_flock)
+{
+    switch (bsd_flock->l_type) {
+    case F_RDLCK:
+	linux_flock->l_type = LINUX_F_RDLCK;
+	break;
+    case F_WRLCK:
+	linux_flock->l_type = LINUX_F_WRLCK;
+	break;
+    case F_UNLCK:
+	linux_flock->l_type = LINUX_F_UNLCK;
+	break;
+    }
+    linux_flock->l_whence = bsd_flock->l_whence;
+    linux_flock->l_start = (linux_off_t)bsd_flock->l_start;
+    linux_flock->l_len = (linux_off_t)bsd_flock->l_len;
+    linux_flock->l_pid = (linux_pid_t)bsd_flock->l_pid;
+}
+
+struct linux_fcntl_args {
+    int fd;
+    int cmd;
+    int arg;
+};
+
+int
+linux_fcntl(struct proc *p, struct linux_fcntl_args *args, int *retval)
+{
+    int error, result;
+    struct fcntl_args {
+	int fd;
+	int cmd;
+	int arg;
+    } fcntl_args; 
+    struct linux_flock linux_flock;
+    struct flock *bsd_flock = 
+	(struct flock *)ua_alloc_init(sizeof(struct flock));
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): fcntl(%d, %08x, *)\n",
+	   p->p_pid, args->fd, args->cmd);
+#endif
+    fcntl_args.fd = args->fd;
+    fcntl_args.arg = 0;
+
+    switch (args->cmd) {
+    case LINUX_F_DUPFD:
+	fcntl_args.cmd = F_DUPFD;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_GETFD:
+	fcntl_args.cmd = F_GETFD;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_SETFD:
+	fcntl_args.cmd = F_SETFD;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_GETFL:
+	fcntl_args.cmd = F_GETFL;
+	error = fcntl(p, &fcntl_args, &result);
+	*retval = 0;
+	if (result & O_RDONLY) *retval |= LINUX_O_RDONLY;
+	if (result & O_WRONLY) *retval |= LINUX_O_WRONLY;
+	if (result & O_RDWR) *retval |= LINUX_O_RDWR;
+	if (result & O_NDELAY) *retval |= LINUX_O_NONBLOCK;
+	if (result & O_APPEND) *retval |= LINUX_O_APPEND;
+	if (result & O_FSYNC) *retval |= LINUX_O_SYNC;
+	return error;
+
+    case LINUX_F_SETFL:
+	if (args->arg & LINUX_O_NDELAY) fcntl_args.arg |= O_NONBLOCK;
+	if (args->arg & LINUX_O_APPEND) fcntl_args.arg |= O_APPEND;
+	if (args->arg & LINUX_O_SYNC) fcntl_args.arg |= O_FSYNC;
+	fcntl_args.cmd = F_SETFL;
+	return fcntl(p, &fcntl_args, retval);
+    
+    case LINUX_F_GETLK:
+	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
+		   	    sizeof(struct linux_flock)))) 
+	    return error;
+	linux_to_bsd_flock(&linux_flock, bsd_flock);
+	fcntl_args.cmd = F_GETLK;
+	fcntl_args.arg = (int)bsd_flock;
+	if (error = fcntl(p, &fcntl_args, retval))
+	    return error;
+	bsd_to_linux_flock(bsd_flock, &linux_flock);
+	return copyout((caddr_t)&linux_flock, (caddr_t)args->arg,
+		       sizeof(struct linux_flock));
+
+    case LINUX_F_SETLK:
+	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
+		   	    sizeof(struct linux_flock)))) 
+	    return error;
+	linux_to_bsd_flock(&linux_flock, bsd_flock);
+	fcntl_args.cmd = F_SETLK;
+	fcntl_args.arg = (int)bsd_flock;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_SETLKW:
+	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
+		   	    sizeof(struct linux_flock)))) 
+	    return error;
+	linux_to_bsd_flock(&linux_flock, bsd_flock);
+	fcntl_args.cmd = F_SETLKW;
+	fcntl_args.arg = (int)bsd_flock;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_SETOWN:
+	fcntl_args.cmd = F_SETOWN;
+	return fcntl(p, &fcntl_args, retval);
+
+    case LINUX_F_GETOWN:
+	fcntl_args.cmd = F_GETOWN;
+	return fcntl(p, &fcntl_args, retval);
+    }
+    return EINVAL;
+}
+
+struct linux_lseek_args {
+    int fdes;
+    unsigned long off;
+    int whence;
+};
+
+int
+linux_lseek(struct proc *p, struct linux_lseek_args *args, int *retval)
+{
+
+    struct lseek_args {
+	int fdes;
+	int pad;
+	off_t off;
+	int whence;
+    } tmp_args;
+    off_t tmp_retval;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): lseek(%d, %d, %d)\n",
+	   p->p_pid, args->fdes, args->off, args->whence);
+#endif
+    tmp_args.fdes = args->fdes;
+    tmp_args.off = (off_t)args->off;
+    tmp_args.whence = args->whence;
+    error = lseek(p, &tmp_args, &tmp_retval);
+    *retval = (int)tmp_retval;
+    return error;
+}
+
+struct linux_dirent {
+    long dino;
+    linux_off_t doff;
+    unsigned short dreclen;
+    char dname[LINUX_NAME_MAX + 1];
+};
+
+#define LINUX_RECLEN(de,namlen) \
+    ALIGN((((char *)&(de)->dname - (char *)de) + (namlen) + 1))
+
+struct linux_readdir_args {
+    int fd;
+    struct linux_dirent *dent;
+    unsigned int count;
+};
+
+int
+linux_readdir(struct proc *p, struct linux_readdir_args *args, int *retval)
+{
+    register struct dirent *bdp;
+    struct vnode *vp;
+    caddr_t inp, buf;		/* BSD-format */
+    int len, reclen;		/* BSD-format */
+    caddr_t outp;		/* Linux-format */
+    int resid, linuxreclen=0;	/* Linux-format */
+    struct file *fp;
+    struct uio auio;
+    struct iovec aiov;
+    struct vattr va;
+    off_t off;
+    struct linux_dirent linux_dirent;
+    int buflen, error, eofflag, nbytes, justone;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): readdir(%d, *, %d)\n",
+	   p->p_pid, args->fd, args->count);
+#endif
+    if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0)
+	return (error);
+
+    if ((fp->f_flag & FREAD) == 0)
+	return (EBADF);
+
+    vp = (struct vnode *) fp->f_data;
+
+    if (vp->v_type != VDIR)
+	return (EINVAL);
+
+    if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)))
+	return error;
+
+    nbytes = args->count;
+    if (nbytes == 1) {
+	nbytes = sizeof (struct linux_dirent);
+	justone = 1;
+    }
+    else
+	justone = 0;
+
+    buflen = max(va.va_blocksize, nbytes);
+    buf = malloc(buflen, M_TEMP, M_WAITOK);
+    VOP_LOCK(vp);
+    off = fp->f_offset;
+again:
+    aiov.iov_base = buf;
+    aiov.iov_len = buflen;
+    auio.uio_iov = &aiov;
+    auio.uio_iovcnt = 1;
+    auio.uio_rw = UIO_READ;
+    auio.uio_segflg = UIO_SYSSPACE;
+    auio.uio_procp = p;
+    auio.uio_resid = buflen;
+    auio.uio_offset = off;
+
+    error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *) 0, 0);
+    if (error)
+	goto out;
+
+    inp = buf;
+    outp = (caddr_t) args->dent;
+    resid = nbytes;
+    if ((len = buflen - auio.uio_resid) == 0)
+	goto eof;
+
+    while (len > 0) {
+	reclen = ((struct dirent *) inp)->d_reclen;
+	if (reclen & 3)
+	    panic("linux_readdir");
+	off += reclen;
+	bdp = (struct dirent *) inp;
+	if (bdp->d_fileno == 0) {
+	    inp += reclen;
+	    continue;
+	}
+	linuxreclen = LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
+	if (reclen > len || resid < linuxreclen) {
+	    outp++;
+	    break;
+	}
+	linux_dirent.dino = (long) bdp->d_fileno;
+	linux_dirent.doff = (linux_off_t) linuxreclen;
+	linux_dirent.dreclen = (u_short) bdp->d_namlen;
+	strcpy(linux_dirent.dname, bdp->d_name);
+	if ((error = copyout((caddr_t)&linux_dirent, outp, linuxreclen)))
+	    goto out;
+	inp += reclen;
+	outp += linuxreclen;
+	resid -= linuxreclen;
+	len -= reclen;
+	if (justone)
+	    break;
+    }
+
+    if (outp == (caddr_t) args->dent)
+	goto again;
+    fp->f_offset = off;
+
+    if (justone)
+	nbytes = resid + linuxreclen;
+eof:
+    *retval = nbytes - resid;
+out:
+    VOP_UNLOCK(vp);
+    free(buf, M_TEMP);
+    return error;
+}
diff --git a/sys/i386/linux/linux_generic.c b/sys/i386/linux/linux_generic.c
new file mode 100644
index 0000000..48df332
--- /dev/null
+++ b/sys/i386/linux/linux_generic.c
@@ -0,0 +1,63 @@
+/*-
+ * Copyright (c) 1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_generic.c,v 1.3 1995/06/25 17:30:46 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+
+#include <vm/vm.h>
+
+
+static caddr_t ua_ptr = NULL;
+
+caddr_t ua_alloc_init(int len)
+{
+    caddr_t ptr;
+
+    ptr = (caddr_t)ALIGN((PS_STRINGS));
+    ptr += sizeof(struct ps_strings);
+    ua_ptr = (caddr_t)(ptr + ALIGN(len));
+    return ptr;
+}
+
+caddr_t ua_alloc(int len)
+{
+    caddr_t ptr;
+
+    ptr = ua_ptr;
+    ua_ptr += ALIGN(len);
+    return ptr;
+}
diff --git a/sys/i386/linux/linux_ioctl.c b/sys/i386/linux/linux_ioctl.c
new file mode 100644
index 0000000..12adff4
--- /dev/null
+++ b/sys/i386/linux/linux_ioctl.c
@@ -0,0 +1,495 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_ioctl.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl_compat.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/tty.h>
+#include <sys/termios.h>
+#include <machine/console.h>
+
+
+struct linux_termios {
+    unsigned long   c_iflag;
+    unsigned long   c_oflag;
+    unsigned long   c_cflag;
+    unsigned long   c_lflag;
+    unsigned char   c_line;
+    unsigned char   c_cc[LINUX_NCCS];
+};
+
+struct linux_winsize {
+    unsigned short ws_row, ws_col;
+    unsigned short ws_xpixel, ws_ypixel;
+};
+
+static struct speedtab sptab[] = {
+    { 0, 0 }, { 50, 1 }, { 75, 2 }, { 110, 3 },
+    { 134, 4 }, { 135, 4 }, { 150, 5 }, { 200, 6 },
+    { 300, 7 }, { 600, 8 }, { 1200, 9 }, { 1800, 10 },
+    { 2400, 11 }, { 4800, 12 }, { 9600, 13 },
+    { 19200, 14 }, { 38400, 15 }, 
+    { 57600, 4097 }, { 115200, 4098 }, {-1, -1 }
+};
+
+static int
+linux_to_bsd_speed(int code, struct speedtab *table)
+{
+    for ( ; table->sp_code != -1; table++)
+	if (table->sp_code == code)
+	    return (table->sp_speed);
+    return -1;
+}
+
+static int
+bsd_to_linux_speed(int speed, struct speedtab *table)
+{
+    for ( ; table->sp_speed != -1; table++)
+	if (table->sp_speed == speed)
+	    return (table->sp_code);
+    return -1;
+}
+
+static void
+bsd_to_linux_termios(struct termios *bsd_termios, 
+		struct linux_termios *linux_termios)
+{
+    int i, speed;
+
+#ifdef DEBUG
+    printf("LINUX: BSD termios structure (input):\n");
+    printf("i=%08x o=%08x c=%08x l=%08x ispeed=%d ospeed=%d\n",
+	   bsd_termios->c_iflag, bsd_termios->c_oflag,
+	   bsd_termios->c_cflag, bsd_termios->c_lflag,
+	   bsd_termios->c_ispeed, bsd_termios->c_ospeed);
+    printf("c_cc ");
+    for (i=0; i<NCCS; i++)
+	printf("%02x ", bsd_termios->c_cc[i]);
+    printf("\n");
+#endif
+    linux_termios->c_iflag = 0;
+    if (bsd_termios->c_iflag & IGNBRK)
+	linux_termios->c_iflag |= LINUX_IGNBRK;
+    if (bsd_termios->c_iflag & BRKINT)
+	linux_termios->c_iflag |= LINUX_BRKINT;
+    if (bsd_termios->c_iflag & IGNPAR)
+	linux_termios->c_iflag |= LINUX_IGNPAR;
+    if (bsd_termios->c_iflag & PARMRK)
+	linux_termios->c_iflag |= LINUX_PARMRK;
+    if (bsd_termios->c_iflag & INPCK)
+	linux_termios->c_iflag |= LINUX_INPCK;
+    if (bsd_termios->c_iflag & ISTRIP)
+	linux_termios->c_iflag |= LINUX_ISTRIP;
+    if (bsd_termios->c_iflag & INLCR)
+	linux_termios->c_iflag |= LINUX_INLCR;
+    if (bsd_termios->c_iflag & IGNCR)
+	linux_termios->c_iflag |= LINUX_IGNCR;
+    if (bsd_termios->c_iflag & ICRNL)
+	linux_termios->c_iflag |= LINUX_ICRNL;
+    if (bsd_termios->c_iflag & IXON)
+	linux_termios->c_iflag |= LINUX_IXANY;
+    if (bsd_termios->c_iflag & IXON)
+	linux_termios->c_iflag |= LINUX_IXON;
+    if (bsd_termios->c_iflag & IXOFF)
+	linux_termios->c_iflag |= LINUX_IXOFF;
+    if (bsd_termios->c_iflag & IMAXBEL)
+	linux_termios->c_iflag |= LINUX_IMAXBEL;
+
+    linux_termios->c_oflag = 0;
+    if (bsd_termios->c_oflag & OPOST)
+	linux_termios->c_oflag |= LINUX_OPOST;
+    if (bsd_termios->c_oflag & ONLCR)
+	linux_termios->c_oflag |= LINUX_ONLCR;
+    if (bsd_termios->c_oflag & OXTABS)
+	linux_termios->c_oflag |= LINUX_XTABS;
+
+    linux_termios->c_cflag =
+	bsd_to_linux_speed(bsd_termios->c_ispeed, sptab);
+    linux_termios->c_cflag |= (bsd_termios->c_cflag & CSIZE) >> 4;
+    if (bsd_termios->c_cflag & CSTOPB)
+	linux_termios->c_cflag |= LINUX_CSTOPB;
+    if (bsd_termios->c_cflag & CREAD)
+	linux_termios->c_cflag |= LINUX_CREAD;
+    if (bsd_termios->c_cflag & PARENB)
+	linux_termios->c_cflag |= LINUX_PARENB;
+    if (bsd_termios->c_cflag & PARODD)
+	linux_termios->c_cflag |= LINUX_PARODD;
+    if (bsd_termios->c_cflag & HUPCL)
+	linux_termios->c_cflag |= LINUX_HUPCL;
+    if (bsd_termios->c_cflag & CLOCAL)
+	linux_termios->c_cflag |= LINUX_CLOCAL;
+    if (bsd_termios->c_cflag & CRTSCTS)
+	linux_termios->c_cflag |= LINUX_CRTSCTS;
+
+    linux_termios->c_lflag = 0;
+    if (bsd_termios->c_lflag & ISIG)
+	linux_termios->c_lflag |= LINUX_ISIG;
+    if (bsd_termios->c_lflag & ICANON)
+	linux_termios->c_lflag |= LINUX_ICANON;
+    if (bsd_termios->c_lflag & ECHO)
+	linux_termios->c_lflag |= LINUX_ECHO;
+    if (bsd_termios->c_lflag & ECHOE)
+	linux_termios->c_lflag |= LINUX_ECHOE;
+    if (bsd_termios->c_lflag & ECHOK)
+	linux_termios->c_lflag |= LINUX_ECHOK;
+    if (bsd_termios->c_lflag & ECHONL)
+	linux_termios->c_lflag |= LINUX_ECHONL;
+    if (bsd_termios->c_lflag & NOFLSH)
+	linux_termios->c_lflag |= LINUX_NOFLSH;
+    if (bsd_termios->c_lflag & TOSTOP)
+	linux_termios->c_lflag |= LINUX_TOSTOP;
+    if (bsd_termios->c_lflag & ECHOCTL)
+	linux_termios->c_lflag |= LINUX_ECHOCTL;
+    if (bsd_termios->c_lflag & ECHOPRT)
+	linux_termios->c_lflag |= LINUX_ECHOPRT;
+    if (bsd_termios->c_lflag & ECHOKE)
+	linux_termios->c_lflag |= LINUX_ECHOKE;
+    if (bsd_termios->c_lflag & FLUSHO)
+	linux_termios->c_lflag |= LINUX_FLUSHO;
+    if (bsd_termios->c_lflag & PENDIN)
+	linux_termios->c_lflag |= LINUX_PENDIN;
+    if (bsd_termios->c_lflag & IEXTEN)
+	linux_termios->c_lflag |= LINUX_IEXTEN;
+
+    for (i=0; i<LINUX_NCCS; i++) 
+	linux_termios->c_cc[i] = _POSIX_VDISABLE;
+    linux_termios->c_cc[LINUX_VINTR] = bsd_termios->c_cc[VINTR];
+    linux_termios->c_cc[LINUX_VQUIT] = bsd_termios->c_cc[VQUIT];
+    linux_termios->c_cc[LINUX_VERASE] = bsd_termios->c_cc[VERASE];
+    linux_termios->c_cc[LINUX_VKILL] = bsd_termios->c_cc[VKILL];
+    linux_termios->c_cc[LINUX_VEOF] = bsd_termios->c_cc[VEOF];
+    linux_termios->c_cc[LINUX_VEOL] = bsd_termios->c_cc[VEOL];
+    linux_termios->c_cc[LINUX_VMIN] = bsd_termios->c_cc[VMIN];
+    linux_termios->c_cc[LINUX_VTIME] = bsd_termios->c_cc[VTIME];
+    linux_termios->c_cc[LINUX_VEOL2] = bsd_termios->c_cc[VEOL2];
+    linux_termios->c_cc[LINUX_VSWTC] = _POSIX_VDISABLE;
+    linux_termios->c_cc[LINUX_VSUSP] = bsd_termios->c_cc[VSUSP];
+    linux_termios->c_cc[LINUX_VSTART] = bsd_termios->c_cc[VSTART];
+    linux_termios->c_cc[LINUX_VSTOP] = bsd_termios->c_cc[VSTOP];
+    linux_termios->c_cc[LINUX_VREPRINT] = bsd_termios->c_cc[VREPRINT];
+    linux_termios->c_cc[LINUX_VDISCARD] = bsd_termios->c_cc[VDISCARD];
+    linux_termios->c_cc[LINUX_VWERASE] = bsd_termios->c_cc[VWERASE];
+    linux_termios->c_cc[LINUX_VLNEXT] = bsd_termios->c_cc[VLNEXT];
+
+    linux_termios->c_line = 0;
+#ifdef DEBUG
+    printf("LINUX: LINUX termios structure (output):\n");
+    printf("i=%08x o=%08x c=%08x l=%08x line=%d\n",
+	   linux_termios->c_iflag, linux_termios->c_oflag,
+	   linux_termios->c_cflag, linux_termios->c_lflag,
+	   linux_termios->c_line);
+    printf("c_cc ");
+    for (i=0; i<LINUX_NCCS; i++) 
+	printf("%02x ", linux_termios->c_cc[i]);
+    printf("\n");
+#endif
+}
+
+static void
+linux_to_bsd_termios(struct linux_termios *linux_termios,
+		struct termios *bsd_termios)
+{
+    int i, speed;
+#ifdef DEBUG
+    printf("LINUX: LINUX termios structure (input):\n");
+    printf("i=%08x o=%08x c=%08x l=%08x line=%d\n",
+	   linux_termios->c_iflag, linux_termios->c_oflag,
+	   linux_termios->c_cflag, linux_termios->c_lflag,
+	   linux_termios->c_line);
+    printf("c_cc ");
+    for (i=0; i<LINUX_NCCS; i++) 
+	printf("%02x ", linux_termios->c_cc[i]);
+    printf("\n");
+#endif
+    bsd_termios->c_iflag = 0;
+    if (linux_termios->c_iflag & LINUX_IGNBRK)
+	bsd_termios->c_iflag |= IGNBRK;
+    if (linux_termios->c_iflag & LINUX_BRKINT)
+	bsd_termios->c_iflag |= BRKINT;
+    if (linux_termios->c_iflag & LINUX_IGNPAR)
+	bsd_termios->c_iflag |= IGNPAR;
+    if (linux_termios->c_iflag & LINUX_PARMRK)
+	bsd_termios->c_iflag |= PARMRK;
+    if (linux_termios->c_iflag & LINUX_INPCK)
+	bsd_termios->c_iflag |= INPCK;
+    if (linux_termios->c_iflag & LINUX_ISTRIP)
+	bsd_termios->c_iflag |= ISTRIP;
+    if (linux_termios->c_iflag & LINUX_INLCR)
+	bsd_termios->c_iflag |= INLCR;
+    if (linux_termios->c_iflag & LINUX_IGNCR)
+	bsd_termios->c_iflag |= IGNCR;
+    if (linux_termios->c_iflag & LINUX_ICRNL)
+	bsd_termios->c_iflag |= ICRNL;
+    if (linux_termios->c_iflag & LINUX_IXON)
+	bsd_termios->c_iflag |= IXANY;
+    if (linux_termios->c_iflag & LINUX_IXON)
+	bsd_termios->c_iflag |= IXON;
+    if (linux_termios->c_iflag & LINUX_IXOFF)
+	bsd_termios->c_iflag |= IXOFF;
+    if (linux_termios->c_iflag & LINUX_IMAXBEL)
+	bsd_termios->c_iflag |= IMAXBEL;
+
+    bsd_termios->c_oflag = 0;
+    if (linux_termios->c_oflag & LINUX_OPOST)
+	bsd_termios->c_oflag |= OPOST;
+    if (linux_termios->c_oflag & LINUX_ONLCR)
+	bsd_termios->c_oflag |= ONLCR;
+    if (linux_termios->c_oflag & LINUX_XTABS)
+	bsd_termios->c_oflag |= OXTABS;
+
+    bsd_termios->c_cflag = (linux_termios->c_cflag & LINUX_CSIZE) << 4;
+    if (linux_termios->c_cflag & LINUX_CSTOPB)
+	bsd_termios->c_cflag |= CSTOPB;
+    if (linux_termios->c_cflag & LINUX_PARENB)
+	bsd_termios->c_cflag |= PARENB;
+    if (linux_termios->c_cflag & LINUX_PARODD)
+	bsd_termios->c_cflag |= PARODD;
+    if (linux_termios->c_cflag & LINUX_HUPCL)
+	bsd_termios->c_cflag |= HUPCL;
+    if (linux_termios->c_cflag & LINUX_CLOCAL)
+	bsd_termios->c_cflag |= CLOCAL;
+    if (linux_termios->c_cflag & LINUX_CRTSCTS)
+	bsd_termios->c_cflag |= CRTSCTS;
+
+    bsd_termios->c_lflag = 0;
+    if (linux_termios->c_lflag & LINUX_ISIG)
+	bsd_termios->c_lflag |= ISIG;
+    if (linux_termios->c_lflag & LINUX_ICANON)
+	bsd_termios->c_lflag |= ICANON;
+    if (linux_termios->c_lflag & LINUX_ECHO)
+	bsd_termios->c_lflag |= ECHO;
+    if (linux_termios->c_lflag & LINUX_ECHOE)
+	bsd_termios->c_lflag |= ECHOE;
+    if (linux_termios->c_lflag & LINUX_ECHOK)
+	bsd_termios->c_lflag |= ECHOK;
+    if (linux_termios->c_lflag & LINUX_ECHONL)
+	bsd_termios->c_lflag |= ECHONL;
+    if (linux_termios->c_lflag & LINUX_NOFLSH)
+	bsd_termios->c_lflag |= NOFLSH;
+    if (linux_termios->c_lflag & LINUX_TOSTOP)
+	bsd_termios->c_lflag |= TOSTOP;
+    if (linux_termios->c_lflag & LINUX_ECHOCTL)
+	bsd_termios->c_lflag |= ECHOCTL;
+    if (linux_termios->c_lflag & LINUX_ECHOPRT)
+	bsd_termios->c_lflag |= ECHOPRT;
+    if (linux_termios->c_lflag & LINUX_ECHOKE)
+	bsd_termios->c_lflag |= ECHOKE;
+    if (linux_termios->c_lflag & LINUX_FLUSHO)
+	bsd_termios->c_lflag |= FLUSHO;
+    if (linux_termios->c_lflag & LINUX_PENDIN)
+	bsd_termios->c_lflag |= PENDIN;
+    if (linux_termios->c_lflag & IEXTEN)
+	bsd_termios->c_lflag |= IEXTEN;
+
+    for (i=0; i<NCCS; i++)
+	bsd_termios->c_cc[i] = _POSIX_VDISABLE;
+    bsd_termios->c_cc[VINTR] = linux_termios->c_cc[LINUX_VINTR];
+    bsd_termios->c_cc[VQUIT] = linux_termios->c_cc[LINUX_VQUIT];
+    bsd_termios->c_cc[VERASE] = linux_termios->c_cc[LINUX_VERASE];
+    bsd_termios->c_cc[VKILL] = linux_termios->c_cc[LINUX_VKILL];
+    bsd_termios->c_cc[VEOF] = linux_termios->c_cc[LINUX_VEOF];
+    bsd_termios->c_cc[VEOL] = linux_termios->c_cc[LINUX_VEOL];
+    bsd_termios->c_cc[VMIN] = linux_termios->c_cc[LINUX_VMIN];
+    bsd_termios->c_cc[VTIME] = linux_termios->c_cc[LINUX_VTIME];
+    bsd_termios->c_cc[VEOL2] = linux_termios->c_cc[LINUX_VEOL2];
+    bsd_termios->c_cc[VSUSP] = linux_termios->c_cc[LINUX_VSUSP];
+    bsd_termios->c_cc[VSTART] = linux_termios->c_cc[LINUX_VSTART];
+    bsd_termios->c_cc[VSTOP] = linux_termios->c_cc[LINUX_VSTOP];
+    bsd_termios->c_cc[VREPRINT] = linux_termios->c_cc[LINUX_VREPRINT];
+    bsd_termios->c_cc[VDISCARD] = linux_termios->c_cc[LINUX_VDISCARD];
+    bsd_termios->c_cc[VWERASE] = linux_termios->c_cc[LINUX_VWERASE];
+    bsd_termios->c_cc[VLNEXT] = linux_termios->c_cc[LINUX_VLNEXT];
+
+    bsd_termios->c_ispeed = bsd_termios->c_ospeed =
+	linux_to_bsd_speed(linux_termios->c_cflag & LINUX_CBAUD, sptab);
+#ifdef DEBUG
+	printf("LINUX: BSD termios structure (output):\n");
+	printf("i=%08x o=%08x c=%08x l=%08x ispeed=%d ospeed=%d\n",
+	       bsd_termios->c_iflag, bsd_termios->c_oflag,
+	       bsd_termios->c_cflag, bsd_termios->c_lflag,
+	       bsd_termios->c_ispeed, bsd_termios->c_ospeed);
+	printf("c_cc ");
+	for (i=0; i<NCCS; i++) 
+	    printf("%02x ", bsd_termios->c_cc[i]);
+	printf("\n");
+#endif
+}
+
+
+struct linux_ioctl_args {
+    int fd;
+    int cmd;
+    int arg;
+};
+
+int
+linux_ioctl(struct proc *p, struct linux_ioctl_args *args, int *retval)
+{
+    struct termios bsd_termios;
+    struct winsize bsd_winsize;
+    struct linux_termios linux_termios;
+    struct linux_winsize linux_winsize;
+    struct filedesc *fdp = p->p_fd;
+    struct file *fp;
+    int (*func)();
+    int bsd_line, linux_line;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): ioctl(%d, %04x, *)\n", 
+	   p->p_pid, args->fd, args->cmd);
+#endif
+    if ((unsigned)args->fd >= fdp->fd_nfiles 
+	|| (fp = fdp->fd_ofiles[args->fd]) == 0)
+	return EBADF;
+
+    if (!fp || (fp->f_flag & (FREAD | FWRITE)) == 0) {
+	return EBADF;
+    }
+
+    func = fp->f_ops->fo_ioctl;
+    switch (args->cmd) {
+    case LINUX_TCGETS:
+	if ((error = (*func)(fp, TIOCGETA, (caddr_t)&bsd_termios, p)) != 0)
+	    return error;
+	bsd_to_linux_termios(&bsd_termios, &linux_termios);
+	return copyout((caddr_t)&linux_termios, (caddr_t)args->arg,
+		       sizeof(linux_termios));
+
+    case LINUX_TCSETS:
+	linux_to_bsd_termios((struct linux_termios *)args->arg, &bsd_termios);
+	return (*func)(fp, TIOCSETA, (caddr_t)&bsd_termios, p);
+
+    case LINUX_TCSETSW:
+	linux_to_bsd_termios((struct linux_termios *)args->arg, &bsd_termios);
+	return (*func)(fp, TIOCSETAW, (caddr_t)&bsd_termios, p);
+
+    case LINUX_TCSETSF:
+	linux_to_bsd_termios((struct linux_termios *)args->arg, &bsd_termios);
+	return (*func)(fp, TIOCSETAF, (caddr_t)&bsd_termios, p);
+	    
+    case LINUX_TIOCGPGRP:
+	args->cmd = TIOCGPGRP;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCSPGRP:
+	args->cmd = TIOCSPGRP;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCGWINSZ:
+	args->cmd = TIOCGWINSZ;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCSWINSZ:
+	args->cmd = TIOCSWINSZ;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIONREAD:
+	args->cmd = FIONREAD;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIONBIO:
+	args->cmd = FIONBIO;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIOASYNC:
+	args->cmd = FIOASYNC;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIONCLEX:
+	args->cmd = FIONCLEX;
+	return ioctl(p, args, retval);
+
+    case LINUX_FIOCLEX:
+	args->cmd = FIOCLEX;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCEXCL:
+	args->cmd = TIOCEXCL;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCNXCL:
+	args->cmd = TIOCNXCL;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCCONS:
+	args->cmd = TIOCCONS;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCNOTTY:
+	args->cmd = TIOCNOTTY;
+	return ioctl(p, args, retval);
+
+    case LINUX_TIOCSETD:
+	switch (args->arg) {
+	case LINUX_N_TTY:
+	    bsd_line = TTYDISC;
+	    return (*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p);
+	case LINUX_N_SLIP:
+	    bsd_line = SLIPDISC;
+	    return (*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p);
+	case LINUX_N_PPP:
+	    bsd_line = PPPDISC;
+	    return (*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p);
+	default:
+	    return EINVAL;
+	}
+	break;
+
+    case LINUX_TIOCGETD:
+	bsd_line = TTYDISC;
+	if (error =(*func)(fp, TIOCSETD, (caddr_t)&bsd_line, p))
+	    return error;
+	switch (bsd_line) {
+	case TTYDISC:
+	    linux_line = LINUX_N_TTY;
+	    break;
+	case SLIPDISC:
+	    linux_line = LINUX_N_SLIP;
+	    break;
+	case PPPDISC:
+	    linux_line = LINUX_N_PPP;
+	    break;
+	default:
+	    return EINVAL;
+	}
+	return copyout(&linux_line, (caddr_t)args->arg, 
+		       sizeof(int));
+    }
+    uprintf("LINUX: 'ioctl' fd=%d, typ=0x%x(%c), num=0x%x not implemented\n",
+	    args->fd, (args->cmd&0xffff00)>>8,
+	    (args->cmd&0xffff00)>>8, args->cmd&0xff);
+    return EINVAL;
+}
diff --git a/sys/i386/linux/linux_ipc.c b/sys/i386/linux/linux_ipc.c
new file mode 100644
index 0000000..b38b229
--- /dev/null
+++ b/sys/i386/linux/linux_ipc.c
@@ -0,0 +1,308 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_ipc.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/proc.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+#include <sys/msg.h>
+
+#include <vm/vm.h>
+
+struct linux_ipc_perm {
+    linux_key_t key;
+    unsigned short uid;
+    unsigned short gid;
+    unsigned short cuid;
+    unsigned short cgid;
+    unsigned short mode;
+    unsigned short seq;
+};
+
+static void
+linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp)
+{
+    bpp->key = lpp->key;
+    bpp->uid = lpp->uid;
+    bpp->gid = lpp->gid;
+    bpp->cuid = lpp->cuid;
+    bpp->cgid = lpp->cgid;
+    bpp->mode = lpp->mode;
+    bpp->seq = lpp->seq;
+}
+
+
+static void
+bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp)
+{
+    lpp->key = bpp->key;
+    lpp->uid = bpp->uid;
+    lpp->gid = bpp->gid;
+    lpp->cuid = bpp->cuid;
+    lpp->cgid = bpp->cgid;
+    lpp->mode = bpp->mode;
+    lpp->seq = bpp->seq;
+}
+
+struct linux_shmid_ds {
+    struct linux_ipc_perm shm_perm;
+    int shm_segsz;
+    linux_time_t shm_atime;
+    linux_time_t shm_dtime;
+    linux_time_t shm_ctime;
+    ushort shm_cpid;
+    ushort shm_lpid;
+    short shm_nattch;
+    ushort private1;
+    void *private2;
+    void *private3;
+};
+
+static void
+linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp)
+{
+    linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
+    bsp->shm_segsz = lsp->shm_segsz;
+    bsp->shm_lpid = lsp->shm_lpid;
+    bsp->shm_cpid = lsp->shm_cpid;
+    bsp->shm_nattch = lsp->shm_nattch;
+    bsp->shm_atime = lsp->shm_atime;
+    bsp->shm_dtime = lsp->shm_dtime;
+    bsp->shm_ctime = lsp->shm_ctime;
+    bsp->shm_internal = lsp->private3;	/* this goes (yet) SOS */
+}
+
+static void
+bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp)
+{
+    bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
+    lsp->shm_segsz = bsp->shm_segsz;
+    lsp->shm_lpid = bsp->shm_lpid;
+    lsp->shm_cpid = bsp->shm_cpid;
+    lsp->shm_nattch = bsp->shm_nattch;
+    lsp->shm_atime = bsp->shm_atime;
+    lsp->shm_dtime = bsp->shm_dtime;
+    lsp->shm_ctime = bsp->shm_ctime;
+    lsp->private3 = bsp->shm_internal;	/* this goes (yet) SOS */
+}
+
+struct linux_ipc_args {
+    int what;
+    int arg1;
+    int arg2;
+    int arg3;
+    caddr_t ptr;
+};
+
+int
+linux_semop(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_semget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_semctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgsnd(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgrcv(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_shmat(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmat_args {
+	int shmid;
+	void *shmaddr;
+	int shmflg;
+    } bsd_args;
+    int error;
+
+    bsd_args.shmid = args->arg1;
+    bsd_args.shmaddr = args->ptr;
+    bsd_args.shmflg = args->arg2;
+    if ((error = shmat(p, &bsd_args, retval)))
+	return error;
+    if ((error = copyout(retval, (caddr_t)args->arg3, sizeof(int))))
+	return error;
+    retval[0] = 0;
+    return 0;
+}
+
+int
+linux_shmdt(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmdt_args {
+	void *shmaddr;
+    } bsd_args;
+
+    bsd_args.shmaddr = args->ptr;
+    return shmdt(p, &bsd_args, retval);
+}
+
+int
+linux_shmget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmget_args {
+	key_t key;
+	int size;
+	int shmflg;
+    } bsd_args;
+
+    bsd_args.key = args->arg1;
+    bsd_args.size = args->arg2;
+    bsd_args.shmflg = args->arg3;
+    return shmget(p, &bsd_args, retval);
+}
+
+int
+linux_shmctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmid_ds bsd_shmid;
+    struct linux_shmid_ds linux_shmid;
+    struct shmctl_args {
+	int shmid;
+	int cmd;
+	struct shmid_ds *buf;
+    } bsd_args;
+    int error;
+
+    switch (args->arg2) {
+    case LINUX_IPC_STAT:
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_STAT;
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = shmctl(p, &bsd_args, retval)))
+	    return error;
+	if ((error = copyin((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		    	    sizeof(struct shmid_ds))))
+	    return error;
+	bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
+	return copyout((caddr_t)&linux_shmid, args->ptr, sizeof(linux_shmid));
+
+    case LINUX_IPC_SET:
+	if ((error = copyin(args->ptr, (caddr_t)&linux_shmid,
+		    	    sizeof(linux_shmid))))
+	    return error;
+	linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		     	     sizeof(struct shmid_ds))))
+	    return error;
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_SET;
+	return shmctl(p, &bsd_args, retval);
+
+    case LINUX_IPC_RMID:
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_RMID;
+	if ((error = copyin(args->ptr, (caddr_t)&linux_shmid, 
+		    	    sizeof(linux_shmid))))
+	    return error;
+	linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		     	     sizeof(struct shmid_ds))))
+	    return error;
+	return shmctl(p, &bsd_args, retval);
+
+    case LINUX_IPC_INFO:
+    case LINUX_SHM_STAT:
+    case LINUX_SHM_INFO:
+    case LINUX_SHM_LOCK:
+    case LINUX_SHM_UNLOCK:
+    default:
+	uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
+	return EINVAL;
+    }
+}
+
+int
+linux_ipc(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    switch (args->what) {
+    case LINUX_SEMOP:
+	return linux_semop(p, args, retval);
+    case LINUX_SEMGET:
+	return linux_semget(p, args, retval);
+    case LINUX_SEMCTL:
+	return linux_semctl(p, args, retval);
+    case LINUX_MSGSND:
+	return linux_msgsnd(p, args, retval);
+    case LINUX_MSGRCV:
+	return linux_msgrcv(p, args, retval);
+    case LINUX_MSGGET:
+	return linux_msgget(p, args, retval);
+    case LINUX_MSGCTL:
+	return linux_msgctl(p, args, retval);
+    case LINUX_SHMAT:
+	return linux_shmat(p, args, retval);
+    case LINUX_SHMDT:
+	return linux_shmdt(p, args, retval);
+    case LINUX_SHMGET:
+	return linux_shmget(p, args, retval);
+    case LINUX_SHMCTL:
+	return linux_shmctl(p, args, retval);
+    default:
+	uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
+	return ENOSYS;
+    }
+}
diff --git a/sys/i386/linux/linux_misc.c b/sys/i386/linux/linux_misc.c
new file mode 100644
index 0000000..bf40786
--- /dev/null
+++ b/sys/i386/linux/linux_misc.c
@@ -0,0 +1,660 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_misc.c,v 1.4 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/mman.h>
+#include <sys/proc.h>
+#include <sys/dirent.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/ioctl.h>
+#include <sys/imgact_aout.h>
+#include <sys/mount.h>
+#include <sys/namei.h>
+#include <sys/resource.h>
+#include <sys/resourcevar.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/times.h>
+#include <sys/utsname.h>
+#include <sys/vnode.h>
+#include <sys/wait.h>
+
+#include <machine/cpu.h>
+#include <machine/psl.h>
+#include <machine/reg.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+
+
+struct linux_alarm_args {
+    unsigned int secs;
+};
+
+int
+linux_alarm(struct proc *p, struct linux_alarm_args *args, int *retval)
+{
+    extern struct timeval time;
+    struct itimerval it, old_it;
+    int s;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): alarm(%d)\n", p->p_pid, args->secs);
+#endif
+    it.it_value.tv_sec = (long)args->secs;
+    it.it_value.tv_usec = 0;
+    it.it_interval.tv_sec = 0;
+    it.it_interval.tv_usec = 0;
+    s = splclock();
+    old_it = p->p_realtimer;
+    if (timerisset(&old_it.it_value))
+	if (timercmp(&old_it.it_value, &time, <))
+	    timerclear(&old_it.it_value);
+	else
+	    timevalsub(&old_it.it_value, &time);
+    splx(s);
+    if (itimerfix(&it.it_value) || itimerfix(&it.it_interval))
+	return EINVAL;
+    s = splclock();
+    untimeout(realitexpire, (caddr_t)p);
+    if (timerisset(&it.it_value)) {
+	timevaladd(&it.it_value, &time);
+	timeout(realitexpire, (caddr_t)p, hzto(&it.it_value));
+    }
+    p->p_realtimer = it;
+    splx(s);
+    if (old_it.it_value.tv_usec)
+	old_it.it_value.tv_sec++;
+    *retval = old_it.it_value.tv_sec;
+    return 0;
+}
+
+struct linux_brk_args {
+    linux_caddr_t dsend;
+};
+
+int
+linux_brk(struct proc *p, struct linux_brk_args *args, int *retval)
+{
+#if 0
+    struct vmspace *vm = p->p_vmspace;
+    vm_offset_t new, old;
+    int error;
+    extern int swap_pager_full;
+
+    if ((vm_offset_t)args->dsend < (vm_offset_t)vm->vm_daddr)
+	return EINVAL;
+    if (((caddr_t)args->dsend - (caddr_t)vm->vm_daddr)
+	> p->p_rlimit[RLIMIT_DATA].rlim_cur)
+	return ENOMEM;
+
+    old = round_page((vm_offset_t)vm->vm_daddr) + ctob(vm->vm_dsize);
+    new = round_page((vm_offset_t)args->dsend);
+    *retval = old;
+    if ((new-old) > 0) {
+	if (swap_pager_full)
+	    return ENOMEM;
+	error = vm_map_find(&vm->vm_map, NULL, 0, &old, (new-old), FALSE);
+	if (error) 
+	    return error;
+	vm->vm_dsize += btoc((new-old));
+	*retval = (int)(vm->vm_daddr + ctob(vm->vm_dsize));
+    }
+    return 0;
+#else
+    struct vmspace *vm = p->p_vmspace;
+    vm_offset_t new, old;
+    struct obreak_args {
+	vm_offset_t newsize;
+    } tmp;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): brk(%08x)\n", p->p_pid, args->dsend);
+#endif
+    old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
+    new = (vm_offset_t)args->dsend;
+    tmp.newsize = new;
+    if (((caddr_t)new > vm->vm_daddr) && !obreak(p, &tmp, retval))
+	retval[0] = (int)new;
+    else
+	retval[0] = (int)old;
+
+    return 0;
+#endif
+}
+
+struct linux_uselib_args {
+    char *library;
+};
+
+int
+linux_uselib(struct proc *p, struct linux_uselib_args *args, int *retval)
+{
+    struct nameidata ni;
+    struct vnode *vnodep;
+    struct exec *a_out = 0;
+    struct vattr attr;
+    unsigned long vmaddr, virtual_offset, file_offset;
+    unsigned long buffer, bss_size;
+    char *ptr;
+    char path[MAXPATHLEN];
+    const char *prefix = "/compat/linux";
+    size_t sz, len;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): uselib(%s)\n", p->p_pid, args->library);
+#endif
+
+    for (ptr = path; (*ptr = *prefix) != '\0'; ptr++, prefix++) ;
+    sz = MAXPATHLEN - (ptr - path);
+    if (error = copyinstr(args->library, ptr, sz, &len))
+	return error;
+    if (*ptr != '/')
+	return EINVAL;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): uselib(%s)\n", p->p_pid, path);
+#endif
+
+    NDINIT(&ni, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p);
+    if (error = namei(&ni))
+	return error;
+
+    vnodep = ni.ni_vp;
+    if (vnodep == NULL)
+	    return ENOEXEC;
+
+    if (vnodep->v_writecount)
+	    return ETXTBSY;
+
+    if (error = VOP_GETATTR(vnodep, &attr, p->p_ucred, p))
+	return error;
+
+    if ((vnodep->v_mount->mnt_flag & MNT_NOEXEC)
+	|| ((attr.va_mode & 0111) == 0)
+	|| (attr.va_type != VREG))
+	    return ENOEXEC;
+
+    if (attr.va_size == 0)
+	    return ENOEXEC;
+
+    if (error = VOP_ACCESS(vnodep, VEXEC, p->p_ucred, p))
+	return error;
+
+    if (error = VOP_OPEN(vnodep, FREAD, p->p_ucred, p))
+	return error;
+
+    error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, 1024,
+	    	    VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vnodep, 0);
+    if (error)
+	return (error);
+
+    /*
+     * Is it a Linux binary ?
+     */
+    if (((a_out->a_magic >> 16) & 0xff) != 0x64)
+	return -1;
+
+    /*
+     * Set file/virtual offset based on a.out variant.
+     */
+    switch ((int)(a_out->a_magic & 0xffff)) {
+    case 0413:	/* ZMAGIC */
+	virtual_offset = 0;
+	file_offset = 1024;
+	break;
+    case 0314:	/* QMAGIC */
+	virtual_offset = 4096;
+	file_offset = 0;
+	break;
+    default:
+	return (-1);
+    }
+
+    vnodep->v_flag |= VTEXT;
+    bss_size = round_page(a_out->a_bss);
+    /*
+     * Check if file_offset page aligned,.
+     * Currently we cannot handle misalinged file offsets,
+     * and so we read in the entire image (what a waste).
+     */
+    if (file_offset & PGOFSET) {
+#ifdef DEBUG
+printf("uselib: Non page aligned binary %d\n", file_offset);
+#endif
+	/*
+	 * Map text+data read/write/execute
+	 */
+	vmaddr = virtual_offset + round_page(a_out->a_entry);
+	error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr,
+		    	    round_page(a_out->a_text + a_out->a_data), FALSE);
+	if (error)
+	    return error;
+
+	error = vm_mmap(kernel_map, &buffer,
+			round_page(a_out->a_text + a_out->a_data + file_offset),
+		   	VM_PROT_READ, VM_PROT_READ, MAP_FILE,
+			(caddr_t)vnodep, trunc_page(file_offset));
+	if (error)
+	    return error;
+
+	error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr, 
+			a_out->a_text + a_out->a_data);
+	if (error)
+	    return error;
+
+	vm_map_remove(kernel_map, trunc_page(vmaddr),
+		      round_page(a_out->a_text + a_out->a_data + file_offset));
+
+	error = vm_map_protect(&p->p_vmspace->vm_map, vmaddr,
+		   	       round_page(a_out->a_text + a_out->a_data),
+		   	       VM_PROT_ALL, TRUE);
+	if (error)
+	    return error;
+    }
+    else {
+#ifdef DEBUG
+printf("uselib: Page aligned binary %d\n", file_offset);
+#endif
+	vmaddr = virtual_offset + round_page(a_out->a_entry);
+	error = vm_mmap(&p->p_vmspace->vm_map, &vmaddr,
+			a_out->a_text + a_out->a_data,
+			VM_PROT_ALL, VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED,
+			(caddr_t)vnodep, file_offset);
+	if (error)
+	    return (error);
+    }
+#ifdef DEBUG
+printf("mem=%08x = %08x %08x\n", vmaddr, ((int*)vmaddr)[0], ((int*)vmaddr)[1]);
+#endif
+    if (bss_size != 0) {
+	vmaddr = virtual_offset + round_page(a_out->a_entry) +
+		 round_page(a_out->a_text + a_out->a_data);
+	error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr, 
+			    bss_size, FALSE);
+	if (error)
+	    return error;
+	error = vm_map_protect(&p->p_vmspace->vm_map, vmaddr, bss_size,
+		   	       VM_PROT_ALL, TRUE);
+	if (error)
+	    return error;
+    }
+    return 0;
+}
+
+struct linux_select_args {
+    void *ptr;
+};
+
+int
+linux_select(struct proc *p, struct linux_select_args *args, int *retval)
+{
+    struct {
+	int nfds;
+	fd_set *readfds;
+	fd_set *writefds;
+	fd_set *exceptfds;
+	struct timeval *timeout; 
+    } linux_args;
+    struct {
+	unsigned int nd;
+	fd_set *in;
+	fd_set *ou;
+	fd_set *ex;
+	struct timeval *tv;
+    } bsd_args;
+    int error;
+
+    if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
+			sizeof(linux_args))))
+	return error;
+#ifdef DEBUG
+    printf("Linux-emul(%d): select(%d, %d, %d, %d, %d)\n", 
+	   p->p_pid, linux_args.nfds, linux_args.readfds,
+	   linux_args.writefds, linux_args.exceptfds, 
+	   linux_args.timeout);
+#endif
+    bsd_args.nd = linux_args.nfds;
+    bsd_args.in = linux_args.readfds;
+    bsd_args.ou = linux_args.writefds;
+    bsd_args.ex = linux_args.exceptfds;
+    bsd_args.tv = linux_args.timeout;
+    return select(p, &bsd_args, retval);
+}
+
+struct linux_getpgid_args {
+    int pid;
+};
+
+int
+linux_getpgid(struct proc *p, struct linux_getpgid_args *args, int *retval)
+{
+    struct proc *curproc;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): getpgid(%d)\n", p->p_pid, args->pid);
+#endif
+    if (args->pid != p->p_pid) {
+	if (!(curproc = pfind(args->pid)))
+	    return ESRCH;
+    }
+    else
+	curproc = p;
+    *retval = curproc->p_pgid;
+    return 0;
+}
+
+int
+linux_fork(struct proc *p, void *args, int *retval)
+{
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): fork()\n", p->p_pid);
+#endif
+    if (error = fork(p, args, retval))
+	return error;
+    if (retval[1] == 1)
+	retval[0] = 0;
+    return 0;
+}
+
+struct linux_mmap_args {
+    void *ptr;
+};
+
+int
+linux_mmap(struct proc *p, struct linux_mmap_args *args, int *retval)
+{
+    struct {
+	linux_caddr_t addr;
+	int len;
+	int prot;
+	int flags;
+	int fd;
+	int pos;
+    } linux_args;
+    struct {
+	caddr_t addr;
+	size_t len;
+	int prot;
+	int flags;
+	int fd;
+	long pad;
+	off_t pos;
+    } bsd_args;
+    int error;
+
+    if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
+			sizeof(linux_args))))
+	return error;
+#ifdef DEBUG
+    printf("Linux-emul(%d): mmap(%08x, %d, %d, %08x, %d, %d)\n",
+	   p->p_pid, linux_args.addr, linux_args.len, linux_args.prot, 
+	   linux_args.flags, linux_args.fd, linux_args.pos);
+#endif
+    bsd_args.flags = 0;
+    if (linux_args.flags & LINUX_MAP_SHARED)
+	bsd_args.flags |= MAP_SHARED;
+    if (linux_args.flags & LINUX_MAP_PRIVATE)
+	bsd_args.flags |= MAP_PRIVATE;
+    if (linux_args.flags & LINUX_MAP_FIXED)
+	bsd_args.flags |= MAP_FIXED;
+    if (linux_args.flags & LINUX_MAP_ANON)
+	bsd_args.flags |= MAP_ANON;
+    bsd_args.addr = linux_args.addr;
+    bsd_args.len = linux_args.len;
+    bsd_args.prot = linux_args.prot;
+    bsd_args.fd = linux_args.fd;
+    bsd_args.pos = linux_args.pos;
+    bsd_args.pad = 0;
+    return mmap(p, &bsd_args, retval);
+}
+
+struct linux_pipe_args {
+    int *pipefds;
+};
+
+int
+linux_pipe(struct proc *p, struct linux_pipe_args *args, int *retval)
+{
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): pipe(*)\n", p->p_pid);
+#endif
+    if (error = pipe(p, 0, retval))
+	return error;
+    if (error = copyout(retval, args->pipefds, 2*sizeof(int)))
+	return error;
+    *retval = 0;
+    return 0;
+}
+
+struct linux_time_args {
+    linux_time_t *tm;
+};
+
+int
+linux_time(struct proc *p, struct linux_time_args *args, int *retval)
+{
+    struct timeval tv;
+    linux_time_t tm;
+    int error;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): time(*)\n", p->p_pid);
+#endif
+    microtime(&tv);
+    tm = tv.tv_sec;
+    if (error = copyout(&tm, args->tm, sizeof(linux_time_t)))
+	return error;
+    *retval = tv.tv_sec;
+    return 0;
+}
+
+struct linux_tms {
+    long    tms_utime;
+    long    tms_stime;
+    long    tms_cutime;
+    long    tms_cstime;
+};
+
+struct linux_tms_args {
+    char *buf;
+};
+
+int
+linux_times(struct proc *p, struct linux_tms_args *args, int *retval)
+{
+    extern int hz;
+    struct timeval tv;
+    struct linux_tms tms;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): times(*)\n", p->p_pid);
+#endif
+    tms.tms_utime = p->p_uticks;
+    tms.tms_stime = p->p_sticks;
+    tms.tms_cutime = p->p_stats->p_cru.ru_utime.tv_sec * hz +
+	    ((p->p_stats->p_cru.ru_utime.tv_usec * hz)/1000000);
+    tms.tms_cstime = p->p_stats->p_cru.ru_stime.tv_sec * hz +
+	    ((p->p_stats->p_cru.ru_stime.tv_usec * hz)/1000000);
+    microtime(&tv);
+    *retval = tv.tv_sec * hz + (tv.tv_usec * hz)/1000000;
+    return (copyout((caddr_t)&tms, (caddr_t)args->buf,
+	    	    sizeof(struct linux_tms)));
+}
+
+struct linux_newuname_t {
+    char sysname[65];
+    char nodename[65];
+    char release[65];
+    char version[65];
+    char machine[65];
+    char domainname[65];
+};
+
+struct linux_newuname_args {
+    char *buf;
+};
+
+int
+linux_newuname(struct proc *p, struct linux_newuname_args *args, int *retval)
+{
+    struct linux_newuname_t linux_newuname;
+    extern char ostype[], osrelease[], machine[];
+    extern char hostname[], domainname[];
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): newuname(*)\n", p->p_pid);
+#endif
+    bzero(&linux_newuname, sizeof(struct linux_newuname_args));
+    strncpy(linux_newuname.sysname, ostype, 64);
+    strncpy(linux_newuname.nodename, hostname, 64);
+    strncpy(linux_newuname.release, osrelease, 64);
+    strncpy(linux_newuname.version, version, 64);
+    strncpy(linux_newuname.machine, machine, 64);
+    strncpy(linux_newuname.domainname, domainname, 64);
+    return (copyout((caddr_t)&linux_newuname, (caddr_t)args->buf,
+	    	    sizeof(struct linux_newuname_t)));
+}
+
+struct linux_utime_args {
+    char	*fname;
+    linux_time_t    *timeptr;
+};
+
+int
+linux_utime(struct proc *p, struct linux_utime_args *args, int *retval)
+{
+    struct bsd_utimes_args {
+	char	*fname;
+	struct	timeval *tptr;
+    } bsdutimes;
+    struct timeval tv;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): utime(%s, *)\n", p->p_pid, args->fname);
+#endif
+    tv.tv_sec = (long)args->timeptr;
+    tv.tv_usec = 0;
+    bsdutimes.tptr = &tv;
+    bsdutimes.fname = args->fname;
+    return utimes(p, &bsdutimes, retval);
+}
+
+struct linux_waitpid_args {
+    int pid;
+    int *status;
+    int options;
+};
+
+int
+linux_waitpid(struct proc *p, struct linux_waitpid_args *args, int *retval)
+{
+    struct wait4_args {
+	int pid;
+	int *status;
+	int options;
+	struct	rusage *rusage;
+	int compat;
+    } tmp;
+    int error, tmpstat;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): waitpid(%d, *, %d)\n", 
+	   p->p_pid, args->pid, args->options);
+#endif
+    tmp.pid = args->pid;
+    tmp.status = args->status;
+    tmp.options = args->options;
+    tmp.rusage = NULL;
+    tmp.compat = 0;
+
+    if (error = wait4(p, &tmp, retval))
+	return error;
+    if (error = copyin(args->status, &tmpstat, sizeof(int)))
+	return error;
+    if (WIFSIGNALED(tmpstat))
+	tmpstat = (tmpstat & 0xffffff80) |
+		  bsd_to_linux_signal[WTERMSIG(tmpstat)];
+    else if (WIFSTOPPED(tmpstat))
+	tmpstat = (tmpstat & 0xffff00ff) |
+	      	  (bsd_to_linux_signal[WSTOPSIG(tmpstat)]<<8);
+    return copyout(&tmpstat, args->status, sizeof(int));
+}
+
+struct linux_wait4_args {
+    int pid;
+    int *status;
+    int options;
+    struct rusage *rusage;
+};
+
+int 
+linux_wait4(struct proc *p, struct linux_wait4_args *args, int *retval)
+{
+    struct wait4_args {
+	int pid;
+	int *status;
+	int options;
+	struct	rusage *rusage;
+	int compat;
+    } tmp;
+    int error, tmpstat;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): wait4(%d, *, %d, *)\n", 
+	   p->p_pid, args->pid, args->options);
+#endif
+    tmp.pid = args->pid;
+    tmp.status = args->status;
+    tmp.options = args->options;
+    tmp.rusage = args->rusage;
+    tmp.compat = 0;
+
+    if (error = wait4(p, &tmp, retval))
+	return error;
+    if (error = copyin(args->status, &tmpstat, sizeof(int)))
+	return error;
+    if (WIFSIGNALED(tmpstat))
+	tmpstat = (tmpstat & 0xffffff80) |
+	      bsd_to_linux_signal[WTERMSIG(tmpstat)];
+    else if (WIFSTOPPED(tmpstat))
+	tmpstat = (tmpstat & 0xffff00ff) |
+	      (bsd_to_linux_signal[WSTOPSIG(tmpstat)]<<8);
+    return copyout(&tmpstat, args->status, sizeof(int));
+}
diff --git a/sys/i386/linux/linux_signal.c b/sys/i386/linux/linux_signal.c
new file mode 100644
index 0000000..528bb62
--- /dev/null
+++ b/sys/i386/linux/linux_signal.c
@@ -0,0 +1,259 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_signal.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/exec.h>
+#include <sys/signal.h>
+#include <sys/signalvar.h>
+
+#include <vm/vm.h>
+
+#include <i386/linux/linux.h>
+
+#define DONTMASK    (sigmask(SIGKILL)|sigmask(SIGSTOP)|sigmask(SIGCHLD))
+
+static sigset_t
+linux_to_bsd_sigmask(linux_sigset_t mask) {
+    int i;
+    sigset_t new = 0;
+
+    for (i = 1; i <= LINUX_NSIG; i++)
+	if (mask & (1 << i-1))
+	    new |= (1 << (linux_to_bsd_signal[i]-1));
+    return new;
+}
+
+static linux_sigset_t
+bsd_to_linux_sigmask(sigset_t mask) {
+    int i;
+    sigset_t new = 0;
+
+    for (i = 1; i <= NSIG; i++)
+	if (mask & (1 << i-1))
+	    new |= (1 << (bsd_to_linux_signal[i]-1));
+    return new;
+}
+
+struct linux_sigaction_args {
+    int sig;
+    linux_sigaction_t *nsa;
+    linux_sigaction_t *osa;
+};
+
+int
+linux_sigaction(struct proc *p, struct linux_sigaction_args *args, int *retval)
+{
+    linux_sigaction_t linux_sa;
+    struct sigaction *nsa = NULL, *osa = NULL, bsd_sa;
+    struct sigaction_args {
+	int sig;
+	struct sigaction *nsa;
+	struct sigaction *osa;
+    } sa;
+    int error;
+    
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigaction(%d, *, *)\n", p->p_pid, args->sig);
+#endif
+    if (args->osa)
+	osa = (struct sigaction *)ua_alloc_init(sizeof(struct sigaction));
+
+    if (args->nsa) {
+	nsa = (struct sigaction *)ua_alloc(sizeof(struct sigaction));
+	if (error = copyin(args->nsa, &linux_sa, sizeof(linux_sigaction_t)))
+	    return error;
+	bsd_sa.sa_mask = linux_to_bsd_sigmask(linux_sa.sa_mask);
+	bsd_sa.sa_handler = linux_sa.sa_handler;
+	bsd_sa.sa_flags = 0;
+	if (linux_sa.sa_flags & LINUX_SA_NOCLDSTOP)
+	    bsd_sa.sa_flags |= SA_NOCLDSTOP;
+	if (linux_sa.sa_flags & LINUX_SA_ONSTACK)
+	    bsd_sa.sa_flags |= SA_ONSTACK;
+	if (linux_sa.sa_flags & LINUX_SA_RESTART)
+	    bsd_sa.sa_flags |= SA_RESTART;
+	if (error = copyout(&bsd_sa, nsa, sizeof(struct sigaction)))
+	    return error;
+    }
+    sa.sig = linux_to_bsd_signal[args->sig];
+    sa.nsa = nsa;
+    sa.osa = osa;
+    if ((error = sigaction(p, &sa, retval)))
+	return error;
+
+    if (args->osa) {
+	if (error = copyin(osa, &bsd_sa, sizeof(struct sigaction)))
+	    return error;
+	linux_sa.sa_handler = bsd_sa.sa_handler;
+	linux_sa.sa_restorer = NULL;
+	linux_sa.sa_mask = bsd_to_linux_sigmask(bsd_sa.sa_mask);
+	linux_sa.sa_flags = 0;
+	if (bsd_sa.sa_flags & SA_NOCLDSTOP)
+	    linux_sa.sa_flags |= LINUX_SA_NOCLDSTOP;
+	if (bsd_sa.sa_flags & SA_ONSTACK)
+	    linux_sa.sa_flags |= LINUX_SA_ONSTACK;
+	if (bsd_sa.sa_flags & SA_RESTART)
+	    linux_sa.sa_flags |= LINUX_SA_RESTART;
+	if (error = copyout(&linux_sa, args->osa, sizeof(linux_sigaction_t)))
+	    return error;
+    }
+    return 0;
+}
+
+struct linux_sigprocmask_args {
+    int how;
+    linux_sigset_t *mask;
+    linux_sigset_t *omask;
+};
+
+int
+linux_sigprocmask(struct proc *p, struct linux_sigprocmask_args *args,
+		  int *retval)
+{
+    int error, s;
+    sigset_t mask;
+    sigset_t omask;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigprocmask(%d, *, *)\n", p->p_pid, args->how);
+#endif
+    if (args->omask != NULL) {
+	omask = bsd_to_linux_sigmask(p->p_sigmask);
+	if (error = copyout(&omask, args->omask, sizeof(sigset_t)))
+	    return error;
+    }
+    if (!(args->mask))
+	return 0;
+    if (error = copyin(args->mask, &mask, sizeof(linux_sigset_t)))
+	return error;
+
+    mask = linux_to_bsd_sigmask(mask);
+    s = splhigh();
+    switch (args->how) {
+    case LINUX_SIG_BLOCK:
+	p->p_sigmask |= (mask & ~DONTMASK);
+	break;
+    case LINUX_SIG_UNBLOCK:
+	p->p_sigmask &= ~mask;
+	break;
+    case LINUX_SIG_SETMASK:
+	p->p_sigmask = (mask & ~DONTMASK);
+	break;
+    default:
+	error = EINVAL;
+	break;
+    }
+    splx(s);
+    return error;
+}
+
+int
+linux_siggetmask(struct proc *p, void *args, int *retval)
+{
+#ifdef DEBUG
+    printf("Linux-emul(%d): siggetmask()\n", p->p_pid);
+#endif
+    *retval = bsd_to_linux_sigmask(p->p_sigmask);
+    return 0;
+}
+
+struct linux_sigsetmask_args {
+    linux_sigset_t mask;
+};
+
+int
+linux_sigsetmask(struct proc *p, struct linux_sigsetmask_args *args,int *retval)
+{
+    int s;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigsetmask(%08x)\n", p->p_pid, args->mask);
+#endif
+    s = splhigh();
+    p->p_sigmask = (linux_to_bsd_sigmask(args->mask) & ~DONTMASK);
+    splx(s);
+    *retval = bsd_to_linux_sigmask(p->p_sigmask);
+    return 0;
+}
+
+struct linux_sigpending_args {
+    linux_sigset_t *mask;
+};
+
+int
+linux_sigpending(struct proc *p, struct linux_sigpending_args *args,int *retval)
+{
+    linux_sigset_t linux_sig;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigpending(*)\n", p->p_pid);
+#endif
+    linux_sig = bsd_to_linux_sigmask(p->p_siglist & p->p_sigmask);
+    return copyout(&linux_sig, args->mask, sizeof(linux_sig));
+}
+
+struct linux_sigsuspend_args {
+    linux_sigset_t mask;
+};
+
+int
+linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args,int *retval)
+{
+    sigset_t tmp;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): sigsuspend(%08x)\n", p->p_pid, args->mask);
+#endif
+    tmp = linux_to_bsd_sigmask(args->mask);
+    return sigsuspend(p, &tmp , retval);
+}
+
+struct linux_kill_args {
+    int pid;
+    int signum;
+};
+
+int
+linux_kill(struct proc *p, struct linux_kill_args *args, int *retval)
+{
+    struct {
+	int pid;
+	int signum;
+    } tmp;
+
+#ifdef DEBUG
+    printf("Linux-emul(%d): kill(%d, %d)\n", 
+	   p->p_pid, args->pid, args->signum);
+#endif
+    tmp.pid = args->pid;
+    tmp.signum = linux_to_bsd_signal[args->signum];
+    return kill(p, &tmp, retval);
+}
diff --git a/sys/i386/linux/linux_socket.c b/sys/i386/linux/linux_socket.c
new file mode 100644
index 0000000..9267063
--- /dev/null
+++ b/sys/i386/linux/linux_socket.c
@@ -0,0 +1,595 @@
+/*-
+ * Copyright (c) 1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_socket.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <netinet/in.h>
+
+
+static int
+linux_to_bsd_domain(int domain)
+{
+    switch (domain) {
+    case LINUX_AF_UNSPEC:
+	return AF_UNSPEC;
+    case LINUX_AF_UNIX:
+	return AF_LOCAL;
+    case LINUX_AF_INET:
+	return AF_INET;
+    case LINUX_AF_AX25:
+	return AF_CCITT;
+    case LINUX_AF_IPX:
+	return AF_IPX;
+    case LINUX_AF_APPLETALK:
+	return AF_APPLETALK;
+    default:
+	return -1;
+    }
+}
+
+static int
+linux_to_bsd_sockopt_level(int level)
+{
+    switch (level) {
+    case LINUX_SOL_SOCKET:
+	return SOL_SOCKET;
+    default:
+	return level;
+    }
+}
+
+static int linux_to_bsd_ip_sockopt(int opt)
+{
+    switch (opt) {
+    case LINUX_IP_TOS:
+	return IP_TOS;
+    case LINUX_IP_TTL:
+	return IP_TTL;
+    default:
+	return -1;
+    }
+}
+
+static int
+linux_to_bsd_so_sockopt(int opt)
+{
+    switch (opt) {
+    case LINUX_SO_DEBUG:
+	return SO_DEBUG;
+    case LINUX_SO_REUSEADDR:
+	return SO_REUSEADDR;
+    case LINUX_SO_TYPE:
+	return SO_TYPE;
+    case LINUX_SO_ERROR:
+	return SO_ERROR;
+    case LINUX_SO_DONTROUTE:
+	return SO_DONTROUTE;
+    case LINUX_SO_BROADCAST:
+	return SO_BROADCAST;
+    case LINUX_SO_SNDBUF:
+	return SO_SNDBUF;
+    case LINUX_SO_RCVBUF:
+	return SO_RCVBUF;
+    case LINUX_SO_KEEPALIVE:
+	return SO_KEEPALIVE;
+    case LINUX_SO_OOBINLINE:
+	return SO_OOBINLINE;
+    case LINUX_SO_LINGER:
+	return SO_LINGER;
+    case LINUX_SO_PRIORITY:
+    case LINUX_SO_NO_CHECK:
+    default:
+	return -1;
+    }
+}
+
+struct linux_socket_args {
+    int domain;
+    int type;
+    int protocol;
+};
+
+static int
+linux_socket(struct proc *p, struct linux_socket_args *args, int *retval)
+{
+    struct linux_socket_args linux_args;
+    struct {
+	int domain;
+	int type;
+	int protocol;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.protocol = linux_args.protocol;
+    bsd_args.type = linux_args.type;
+    bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
+    if (bsd_args.domain == -1)
+	return EINVAL;
+    return socket(p, &bsd_args, retval);
+}
+
+struct linux_bind_args {
+    int s;
+    struct sockaddr *name;
+    int namelen;
+};
+
+static int
+linux_bind(struct proc *p, struct linux_bind_args *args, int *retval)
+{
+    struct linux_bind_args linux_args;
+    struct {
+	int s;
+	caddr_t name;
+	int namelen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.name = (caddr_t)linux_args.name;
+    bsd_args.namelen = linux_args.namelen;
+    return bind(p, &bsd_args, retval);
+}
+
+struct linux_connect_args {
+    int s;
+    struct sockaddr * name;
+    int namelen;
+};
+
+static int
+linux_connect(struct proc *p, struct linux_connect_args *args, int *retval)
+{
+    struct linux_connect_args linux_args;
+    struct {
+	int s;
+	caddr_t name;
+	int namelen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.name = (caddr_t)linux_args.name;
+    bsd_args.namelen = linux_args.namelen;
+    return connect(p, &bsd_args, retval);
+}
+
+struct linux_listen_args {
+    int s;
+    int backlog;
+};
+
+static int
+linux_listen(struct proc *p, struct linux_listen_args *args, int *retval)
+{
+    struct linux_listen_args linux_args;
+    struct {
+	int s;
+	int backlog;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.backlog = linux_args.backlog;
+    return listen(p, &bsd_args, retval);
+}
+
+struct linux_accept_args {
+    int s;
+    struct sockaddr *addr;
+    int *namelen;
+};
+
+static int
+linux_accept(struct proc *p, struct linux_accept_args *args, int *retval)
+{
+    struct linux_accept_args linux_args;
+    struct accept_args {
+	int s;
+	caddr_t name;
+	int *anamelen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.name = (caddr_t)linux_args.addr;
+    bsd_args.anamelen = linux_args.namelen;
+    return oaccept(p, &bsd_args, retval);
+}
+
+struct linux_getsockname_args {
+    int s;
+    struct sockaddr *addr;
+    int *namelen;
+};
+
+static int
+linux_getsockname(struct proc *p, struct linux_getsockname_args *args, int *retval)
+{
+    struct linux_getsockname_args linux_args;
+    struct {
+	int fdes;
+	caddr_t asa;
+	int *alen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.fdes = linux_args.s;
+    bsd_args.asa = (caddr_t) linux_args.addr;
+    bsd_args.alen = linux_args.namelen;
+    return ogetsockname(p, &bsd_args, retval);
+}
+
+struct linux_getpeername_args {
+    int s;
+    struct sockaddr *addr;
+    int *namelen;
+};
+
+static int
+linux_getpeername(struct proc *p, struct linux_getpeername_args *args, int *retval)
+{
+    struct linux_getpeername_args linux_args;
+    struct getpeername_args {
+	int fdes;
+	caddr_t asa;
+	int *alen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.fdes = linux_args.s;
+    bsd_args.asa = (caddr_t) linux_args.addr;
+    bsd_args.alen = linux_args.namelen;
+    return ogetpeername(p, &bsd_args, retval);
+}
+
+struct linux_socketpair_args {
+    int domain;
+    int type;
+    int protocol;
+    int *rsv;
+};
+
+static int
+linux_socketpair(struct proc *p, struct linux_socketpair_args *args, int *retval)
+{
+    struct linux_socketpair_args linux_args;
+    struct {
+	int domain;
+	int type;
+	int protocol;
+	int *rsv;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
+    if (bsd_args.domain == -1)
+	return EINVAL;
+    bsd_args.type = linux_args.type;
+    bsd_args.protocol = linux_args.protocol;
+    bsd_args.rsv = linux_args.rsv;
+    return socketpair(p, &bsd_args, retval);
+}
+
+struct linux_send_args {
+    int s;
+    void *msg;
+    int len;
+    int flags;
+};
+
+static int
+linux_send(struct proc *p, struct linux_send_args *args, int *retval)
+{
+    struct linux_send_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	int len;
+	int flags;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.msg;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    return osend(p, &bsd_args, retval);
+}
+
+struct linux_recv_args {
+    int s;
+    void *msg;
+    int len;
+    int flags;
+};
+
+static int
+linux_recv(struct proc *p, struct linux_recv_args *args, int *retval)
+{
+    struct linux_recv_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	int len;
+	int flags;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.msg;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    return orecv(p, &bsd_args, retval);
+}
+
+struct linux_sendto_args {
+    int s;
+    void *msg;
+    int len;
+    int flags;
+    caddr_t to;
+    int tolen;
+};
+
+static int
+linux_sendto(struct proc *p, struct linux_sendto_args *args, int *retval)
+{
+    struct linux_sendto_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	size_t len;
+	int flags;
+	caddr_t to;
+	int tolen;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.msg;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    bsd_args.to = linux_args.to;
+    bsd_args.tolen = linux_args.tolen;
+    return sendto(p, &bsd_args, retval);
+}
+
+struct linux_recvfrom_args {
+    int s;
+    void *buf;
+    int len;
+    int flags;
+    caddr_t from;
+    int *fromlen;
+};
+
+static int
+linux_recvfrom(struct proc *p, struct linux_recvfrom_args *args, int *retval)
+{
+    struct linux_recvfrom_args linux_args;
+    struct {
+	int s;
+	caddr_t buf;
+	size_t len;
+	int flags;
+	caddr_t from;
+	int *fromlenaddr;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.buf = linux_args.buf;
+    bsd_args.len = linux_args.len;
+    bsd_args.flags = linux_args.flags;
+    bsd_args.from = linux_args.from;
+    bsd_args.fromlenaddr = linux_args.fromlen;
+    return orecvfrom(p, &bsd_args, retval);
+}
+
+struct linux_shutdown_args {
+    int s;
+    int how;
+};
+
+static int
+linux_shutdown(struct proc *p, struct linux_shutdown_args *args, int *retval)
+{
+    struct linux_shutdown_args linux_args;
+    struct {
+	int s;
+	int how;
+    } bsd_args;
+    int error;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.how = linux_args.how;
+    return shutdown(p, &bsd_args, retval);
+}
+
+struct linux_setsockopt_args {
+    int s;
+    int level;
+    int optname;
+    void *optval;
+    int optlen;
+};
+
+static int
+linux_setsockopt(struct proc *p, struct linux_setsockopt_args *args, int *retval)
+{
+    struct linux_setsockopt_args linux_args;
+    struct {
+	int s;
+	int level;
+	int name;
+	caddr_t val;
+	int valsize;
+    } bsd_args;
+    int error, name;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
+    switch (bsd_args.level) {
+    case SOL_SOCKET:
+	name = linux_to_bsd_so_sockopt(linux_args.optname);
+	break;
+    case IPPROTO_IP:
+	name = linux_to_bsd_ip_sockopt(linux_args.optname);
+	break;
+    default:
+	return EINVAL;
+    }
+    if (name == -1)
+	return EINVAL;
+    bsd_args.name = name;
+    bsd_args.val = linux_args.optval;
+    bsd_args.valsize = linux_args.optlen;
+    return setsockopt(p, &bsd_args, retval);
+}
+
+struct linux_getsockopt_args {
+    int s;
+    int level;
+    int optname;
+    void *optval;
+    int *optlen;
+};
+
+static int
+linux_getsockopt(struct proc *p, struct linux_getsockopt_args *args, int *retval)
+{
+    struct linux_getsockopt_args linux_args;
+    struct {
+	int s;
+	int level;
+	int name;
+	caddr_t val;
+	int *avalsize;
+    } bsd_args;
+    int error, name;
+
+    if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
+	return error;
+    bsd_args.s = linux_args.s;
+    bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
+    switch (bsd_args.level) {
+    case SOL_SOCKET:
+	name = linux_to_bsd_so_sockopt(linux_args.optname);
+	break;
+    case IPPROTO_IP:
+	name = linux_to_bsd_ip_sockopt(linux_args.optname);
+	break;
+    default:
+	return EINVAL;
+    }
+    if (name == -1)
+	return EINVAL;
+    bsd_args.val = linux_args.optval;
+    bsd_args.avalsize = linux_args.optlen;
+    return getsockopt(p, &bsd_args, retval);
+}
+
+struct linux_socketcall_args {
+    int what;
+    void *args;
+};
+
+int
+linux_socketcall(struct proc *p, struct linux_socketcall_args *args,int *retval)
+{
+    switch (args->what) {
+    case LINUX_SOCKET:
+	return linux_socket(p, args->args, retval);
+    case LINUX_BIND:
+	return linux_bind(p, args->args, retval);
+    case LINUX_CONNECT:
+	return linux_connect(p, args->args, retval);
+    case LINUX_LISTEN:
+	return linux_listen(p, args->args, retval);
+    case LINUX_ACCEPT:
+	return linux_accept(p, args->args, retval);
+    case LINUX_GETSOCKNAME:
+	return linux_getsockname(p, args->args, retval);
+    case LINUX_GETPEERNAME:
+	return linux_getpeername(p, args->args, retval);
+    case LINUX_SOCKETPAIR:
+	return linux_socketpair(p, args->args, retval);
+    case LINUX_SEND:
+	return linux_send(p, args->args, retval);
+    case LINUX_RECV:
+	return linux_recv(p, args->args, retval);
+    case LINUX_SENDTO:
+	return linux_sendto(p, args->args, retval);
+    case LINUX_RECVFROM:
+	return linux_recvfrom(p, args->args, retval);
+    case LINUX_SHUTDOWN:
+	return linux_shutdown(p, args->args, retval);
+    case LINUX_SETSOCKOPT:
+	return linux_setsockopt(p, args->args, retval);
+    case LINUX_GETSOCKOPT:
+	return linux_getsockopt(p, args->args, retval);
+    default:
+	uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
+	return ENOSYS;
+    }
+}
diff --git a/sys/i386/linux/linux_stats.c b/sys/i386/linux/linux_stats.c
new file mode 100644
index 0000000..1dbfcf1
--- /dev/null
+++ b/sys/i386/linux/linux_stats.c
@@ -0,0 +1,273 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_stats.c,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/dirent.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/proc.h>
+#include <sys/mount.h>
+#include <sys/namei.h>
+#include <sys/stat.h>
+#include <sys/vnode.h>
+
+#include <machine/cpu.h>
+#include <machine/psl.h>
+#include <machine/reg.h>
+
+#include <i386/linux/linux.h>
+
+struct linux_newstat {
+    unsigned short stat_dev;
+    unsigned short __pad1;
+    unsigned long stat_ino;
+    unsigned short stat_mode;
+    unsigned short stat_nlink;
+    unsigned short stat_uid;
+    unsigned short stat_gid;
+    unsigned short stat_rdev;
+    unsigned short __pad2;
+    unsigned long stat_size;
+    unsigned long stat_blksize;
+    unsigned long stat_blocks;
+    unsigned long stat_atime;
+    unsigned long __unused1;
+    unsigned long stat_mtime;
+    unsigned long __unused2;
+    unsigned long stat_ctime;
+    unsigned long __unused3;
+    unsigned long __unused4;
+    unsigned long __unused5;
+};
+
+struct linux_newstat_args {
+    char *path;
+    struct linux_newstat *buf;
+};
+
+static int
+newstat_copyout(struct stat *buf, void *ubuf)
+{
+    struct linux_newstat tbuf;
+
+    tbuf.stat_dev = (buf->st_dev & 0xff) | ((buf->st_dev & 0xff00)<<10);
+    tbuf.stat_ino = buf->st_ino;
+    tbuf.stat_mode = buf->st_mode;
+    tbuf.stat_nlink = buf->st_nlink;
+    tbuf.stat_uid = buf->st_uid;
+    tbuf.stat_gid = buf->st_gid;
+    tbuf.stat_rdev = buf->st_rdev;
+    tbuf.stat_size = buf->st_size;
+    tbuf.stat_atime = buf->st_atime;
+    tbuf.stat_mtime = buf->st_mtime;
+    tbuf.stat_ctime = buf->st_ctime;
+    tbuf.stat_blksize = buf->st_blksize;
+    tbuf.stat_blocks = buf->st_blocks;
+    return copyout(&tbuf, ubuf, sizeof(tbuf));
+}
+
+int
+linux_newstat(struct proc *p, struct linux_newstat_args *args, int *retval)
+{
+    struct stat buf;
+    struct linux_newstat tbuf;
+    struct nameidata nd;
+    int error;
+  
+#ifdef DEBUG
+    printf("Linux-emul(%d): newstat(%s, *)\n", p->p_pid, args->path);
+#endif
+    NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
+    error = namei(&nd);
+    if (!error) {
+	error = vn_stat(nd.ni_vp, &buf, p);
+	vput(nd.ni_vp);
+    }
+    if (!error) 
+	error = newstat_copyout(&buf, args->buf);
+    return error;
+}
+
+int
+linux_newlstat(struct proc *p, struct linux_newstat_args *args, int *retval)
+{
+    struct stat buf;
+    struct linux_newstat tbuf;
+    struct nameidata nd;
+    int error;
+  
+#ifdef DEBUG
+    printf("Linux-emul(%d): newlstat(%s, *)\n", p->p_pid, args->path);
+#endif
+    NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
+    error = namei(&nd);
+    if (!error) {
+	error = vn_stat(nd.ni_vp, &buf, p);
+	vput(nd.ni_vp);
+    }
+    if (!error)
+	error = newstat_copyout(&buf, args->buf);
+    return error;
+}
+
+struct linux_newfstat_args {
+    int fd;
+    struct linux_newstat *buf;
+};
+
+int
+linux_newfstat(struct proc *p, struct linux_newfstat_args *args, int *retval)
+{
+    struct linux_newstat tbuf;
+    struct filedesc *fdp = p->p_fd;
+    struct file *fp;
+    struct stat buf;
+    int error;
+  
+#ifdef DEBUG
+    printf("Linux-emul(%d): newlstat(%d, *)\n", p->p_pid, args->fd);
+#endif
+    if ((unsigned)args->fd >= fdp->fd_nfiles 
+	|| (fp = fdp->fd_ofiles[args->fd]) == NULL)
+	return EBADF;
+    switch (fp->f_type) {
+    case DTYPE_VNODE:
+	error = vn_stat((struct vnode *)fp->f_data, &buf, p);
+	break;
+    case DTYPE_SOCKET:
+	error = soo_stat((struct socket *)fp->f_data, &buf);
+	break;
+    default:
+	panic("LINUX newfstat");
+    }
+    if (!error)
+	error = newstat_copyout(&buf, args->buf);
+    return error;
+}
+
+struct linux_statfs {
+	long ftype;
+	long fbsize;
+	long fblocks;
+	long fbfree;
+	long fbavail;
+	long ffiles;
+	long fffree;
+	linux_fsid_t ffsid;
+	long fnamelen;
+	long fspare[6];
+};
+
+
+struct linux_statfs_args {
+	char *path;
+	struct statfs *buf;
+};
+
+int
+linux_statfs(struct proc *p, struct linux_statfs_args *args, int *retval)
+{
+	struct mount *mp;
+	struct nameidata *ndp;
+	struct statfs *bsd_statfs;
+	struct nameidata nd;
+	struct linux_statfs linux_statfs;
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
+#endif
+	ndp = &nd;
+  	ndp->ni_cnd.cn_nameiop = LOOKUP;
+	ndp->ni_cnd.cn_flags = FOLLOW;
+	ndp->ni_cnd.cn_proc = curproc;
+	ndp->ni_cnd.cn_cred = curproc->p_cred->pc_ucred;
+	ndp->ni_segflg = UIO_USERSPACE;
+	ndp->ni_dirp = args->path;
+	if (error = namei(ndp))
+		return error;
+	mp = ndp->ni_vp->v_mount;
+	bsd_statfs = &mp->mnt_stat;
+	vrele(ndp->ni_vp);
+	if (error = VFS_STATFS(mp, bsd_statfs, p))
+		return error;
+	bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
+	linux_statfs.ftype = bsd_statfs->f_type;
+	linux_statfs.fbsize = bsd_statfs->f_bsize;
+	linux_statfs.fblocks = bsd_statfs->f_blocks;
+	linux_statfs.fbfree = bsd_statfs->f_bfree;
+	linux_statfs.fbavail = bsd_statfs->f_bavail;
+  	linux_statfs.fffree = bsd_statfs->f_ffree;
+	linux_statfs.ffiles = bsd_statfs->f_files;
+	linux_statfs.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
+	linux_statfs.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
+	linux_statfs.fnamelen = MAXNAMLEN;
+	return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf,
+		       sizeof(struct linux_statfs));
+}
+
+struct linux_fstatfs_args {
+	int fd;
+	struct statfs *buf;
+};
+
+int
+linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args, int *retval)
+{
+	struct file *fp;
+	struct mount *mp;
+	struct statfs *bsd_statfs;
+	struct linux_statfs linux_statfs;
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
+#endif
+	if (error = getvnode(p->p_fd, args->fd, &fp))
+		return error;
+	mp = ((struct vnode *)fp->f_data)->v_mount;
+	bsd_statfs = &mp->mnt_stat;
+	if (error = VFS_STATFS(mp, bsd_statfs, p))
+		return error;
+	bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
+	linux_statfs.ftype = bsd_statfs->f_type;
+	linux_statfs.fbsize = bsd_statfs->f_bsize;
+	linux_statfs.fblocks = bsd_statfs->f_blocks;
+	linux_statfs.fbfree = bsd_statfs->f_bfree;
+	linux_statfs.fbavail = bsd_statfs->f_bavail;
+  	linux_statfs.fffree = bsd_statfs->f_ffree;
+	linux_statfs.ffiles = bsd_statfs->f_files;
+	linux_statfs.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
+	linux_statfs.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
+	linux_statfs.fnamelen = MAXNAMLEN;
+	return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf,
+		       sizeof(struct linux_statfs));
+}
diff --git a/sys/i386/linux/linux_sysent.c b/sys/i386/linux/linux_sysent.c
new file mode 100644
index 0000000..015d49a
--- /dev/null
+++ b/sys/i386/linux/linux_sysent.c
@@ -0,0 +1,367 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *  $Id: linux_sysent.c,v 1.3 1995/06/08 13:50:52 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysent.h>
+#include <sys/imgact.h>
+#include <sys/errno.h>
+#include <sys/signal.h>
+
+extern int access();
+extern int acct();
+extern int linux_adjtimex();
+extern int linux_alarm();
+extern int linux_bdflush();
+extern int linux_break();
+extern int linux_brk();
+extern int chdir();
+extern int chmod();
+extern int chown();
+extern int chroot();
+extern int linux_clone();
+extern int close();
+extern int linux_creat();
+extern int linux_create_module();
+extern int linux_delete_module();
+extern int dup();
+extern int dup2();
+extern int execve();
+extern int exit();
+extern int fchdir();
+extern int fchmod();
+extern int fchown();
+extern int linux_fcntl();
+extern int linux_fork();
+extern int linux_fstat();
+extern int linux_fstatfs();
+extern int fsync();
+extern int linux_ftime();
+extern int oftruncate();
+extern int linux_get_kernel_syms();
+extern int getegid();
+extern int geteuid();
+extern int getgid();
+extern int getgroups();
+extern int getitimer();
+extern int linux_getpgid();
+extern int getpgrp();
+extern int getpid();
+extern int getppid();
+extern int getpriority();
+extern int ogetrlimit();
+extern int getrusage();
+extern int gettimeofday();
+extern int getuid();
+extern int linux_gtty();
+extern int linux_idle();
+extern int linux_init_module();
+extern int linux_ioctl();
+extern int linux_ioperm();
+extern int linux_iopl();
+extern int linux_ipc();
+extern int linux_kill();
+extern int link();
+extern int linux_lock();
+extern int linux_lseek();
+extern int ostat();
+extern int mkdir();
+extern int mknod();
+extern int linux_mmap();
+extern int linux_modify_ldt();
+extern int linux_mount();
+extern int mprotect();
+extern int linux_mpx();
+extern int munmap();
+extern int linux_newfstat();
+extern int linux_newlstat();
+extern int linux_newstat();
+extern int linux_newuname();
+extern int linux_nice();
+extern int linux_olduname();
+extern int linux_open();
+extern int linux_pause();
+extern int linux_phys();
+extern int linux_pipe();
+extern int linux_prof();
+extern int profil();
+extern int linux_ptrace();
+extern int linux_quotactl();
+extern int read();
+extern int linux_readdir();
+extern int readlink();
+extern int reboot();
+extern int rename();
+extern int rmdir();
+extern int linux_select();
+extern int setdomainname();
+extern int setgid();
+extern int setgroups();
+extern int osethostname();
+extern int setitimer();
+extern int setpgid();
+extern int setpriority();
+extern int setregid();
+extern int setreuid();
+extern int osetrlimit();
+extern int setsid();
+extern int settimeofday();
+extern int setuid();
+extern int sigreturn();
+extern int linux_setup();
+extern int linux_sigaction();
+extern int linux_siggetmask();
+extern int linux_signal();
+extern int linux_sigpending();
+extern int linux_sigprocmask();
+extern int linux_sigreturn();
+extern int linux_sigsetmask();
+extern int linux_sigsuspend();
+extern int linux_socketcall();
+extern int linux_stat();
+extern int linux_statfs();
+extern int linux_stime();
+extern int linux_stty();
+extern int linux_swapoff();
+extern int swapon();
+extern int symlink();
+extern int sync();
+extern int linux_sysinfo();
+extern int linux_syslog();
+extern int linux_time();
+extern int linux_times();
+extern int otruncate();
+extern int linux_ulimit();
+extern int umask();
+extern int linux_umount();
+extern int linux_uname();
+extern int unlink();
+extern int linux_uselib();
+extern int linux_ustat();
+extern int linux_utime();
+extern int linux_vhangup();
+extern int linux_vm86();
+extern int linux_wait4();
+extern int linux_waitpid();
+extern int write();
+
+static struct sysent linux_sysent[] = {
+    0, linux_setup,		/* 0 */
+    1, exit,			/* 1 */
+    0, linux_fork,		/* 2 */
+    3, read,			/* 3 */
+    3, write,			/* 4 */
+    3, linux_open,		/* 5 */
+    1, close,			/* 6 */
+    3, linux_waitpid,		/* 7 */
+    2, linux_creat,		/* 8 */
+    2, link,			/* 9 */
+    1, unlink,	    		/* 10 */
+    3, execve,	    		/* 11 */
+    1, chdir,			/* 12 */
+    1, linux_time,		/* 13 */
+    3, mknod,			/* 14 */
+    2, chmod,			/* 15 */
+    3, chown,			/* 16 */
+    1, linux_break,		/* 17 */
+    2, linux_stat,		/* 18 */
+    3, linux_lseek,		/* 19 */
+    0, getpid,	    		/* 20 */
+    5, linux_mount,		/* 21 */
+    1, linux_umount,		/* 22 */
+    1, setuid,	    		/* 23 */
+    0, getuid,	    		/* 24 */
+    1, linux_stime,		/* 25 */
+    4, linux_ptrace,		/* 26 */
+    1, linux_alarm,		/* 27 */
+    2, linux_fstat,		/* 28 */
+    0, linux_pause,		/* 29 */
+    2, linux_utime,		/* 30 */
+    0, linux_stty,		/* 31 */
+    0, linux_gtty,		/* 32 */
+    2, access,	    		/* 33 */
+    1, linux_nice,		/* 34 */
+    0, linux_ftime,		/* 35 */
+    0, sync,			/* 36 */
+    2, linux_kill,		/* 37 */
+    2, rename,	    		/* 38 */
+    2, mkdir,			/* 39 */
+    1, rmdir,			/* 40 */
+    1, dup,	    		/* 41 */
+    1, linux_pipe,		/* 42 */
+    1, linux_times,		/* 43 */
+    0, linux_prof,		/* 44 */
+    1, linux_brk,		/* 45 */
+    1, setgid,	    		/* 46 */
+    0, getgid,	    		/* 47 */
+    2, linux_signal,		/* 48 */
+    0, geteuid,	    		/* 49 */
+    0, getegid,	    		/* 50 */
+    0, acct,			/* 51 */
+    0, linux_phys,		/* 52 */
+    0, linux_lock,		/* 53 */
+    3, linux_ioctl,		/* 54 */
+    3, linux_fcntl,		/* 55 */
+    0, linux_mpx,		/* 56 */
+    2, setpgid,	    		/* 57 */
+    0, linux_ulimit,		/* 58 */
+    1, linux_olduname,		/* 59 */
+    1, umask,			/* 60 */
+    1, chroot,	    		/* 61 */
+    2, linux_ustat,		/* 62 */
+    2, dup2,			/* 63 */
+    0, getppid,	    		/* 64 */
+    0, getpgrp,	    		/* 65 */
+    0, setsid,	    		/* 66 */
+    3, linux_sigaction,		/* 67 */
+    0, linux_siggetmask,	/* 68 */
+    1, linux_sigsetmask,	/* 69 */
+    2, setreuid,		/* 70 */
+    2, setregid,		/* 71 */
+    1, linux_sigsuspend,	/* 72 */
+    1, linux_sigpending,	/* 73 */
+    2, osethostname,		/* 74 */
+    2, osetrlimit,		/* 75 */
+    2, ogetrlimit,		/* 76 */
+    2, getrusage,		/* 77 */
+    2, gettimeofday,		/* 78 */
+    2, settimeofday,		/* 79 */
+    2, getgroups,		/* 80 */
+    2, setgroups,		/* 81 */
+    1, linux_select,		/* 82 */
+    2, symlink,	    		/* 83 */
+    2, ostat,			/* 84 */
+    3, readlink,		/* 85 */
+    1, linux_uselib,		/* 86 */
+    1, swapon,	    		/* 87 */
+    3, reboot,	    		/* 88 */
+    3, linux_readdir,		/* 89 */
+    1, linux_mmap,		/* 90 */
+    2, munmap,	    		/* 91 */
+    2, otruncate,		/* 92 */
+    2, oftruncate,		/* 93 */
+    2, fchmod,	    		/* 94 */
+    3, fchown,	    		/* 95 */
+    2, getpriority,		/* 96 */
+    3, setpriority,		/* 97 */
+    0, profil,	    		/* 98 */
+    2, linux_statfs,		/* 99 */
+    2, linux_fstatfs,		/* 100 */
+    3, linux_ioperm,		/* 101 */
+    2, linux_socketcall,	/* 102 */
+    3, linux_syslog,		/* 103 */
+    3, setitimer,		/* 104 */
+    2, getitimer,		/* 105 */
+    2, linux_newstat,		/* 106 */
+    2, linux_newlstat,		/* 107 */
+    2, linux_newfstat,		/* 108 */
+    2, linux_uname,		/* 109 */
+    1, linux_iopl,		/* 110 */
+    0, linux_vhangup,		/* 111 */
+    0, linux_idle,		/* 112 */
+    1, linux_vm86,		/* 113 */
+    4, linux_wait4,		/* 114 */
+    1, linux_swapoff,		/* 115 */
+    1, linux_sysinfo,		/* 116 */
+    4, linux_ipc,		/* 117 */
+    1, fsync,			/* 118 */
+    1, linux_sigreturn,		/* 119 */
+    0, linux_clone,		/* 120 */
+    2, setdomainname,		/* 121 */
+    1, linux_newuname,		/* 122 */
+    3, linux_modify_ldt,	/* 123 */
+    1, linux_adjtimex,		/* 124 */
+    3, mprotect,		/* 125 */
+    3, linux_sigprocmask,	/* 126 */
+    2, linux_create_module,	/* 127 */
+    4, linux_init_module,	/* 128 */
+    1, linux_delete_module,	/* 129 */
+    1, linux_get_kernel_syms,	/* 130 */
+    0, linux_quotactl,		/* 131 */
+    1, linux_getpgid,		/* 132 */
+    1, fchdir,	    		/* 133 */
+    0, linux_bdflush,		/* 134 */
+};
+
+int bsd_to_linux_errno[ELAST] = {
+      0,  1,  2,  3,  4,  5,  6,  7,  8,  9,
+     10, 35, 12, 13, 14, 15, 16, 17, 18, 19,
+     20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+     30, 31, 32, 33, 34, 11,115,114, 88, 89,
+     90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
+    100,101,102,103,104,105,106,107,108,109,
+    110,111, 40, 36,112,113, 39, 11, 87,122,
+    116, 66,  6,  6,  6,  6,  6, 37, 38,  9,
+      6, 
+};
+
+int bsd_to_linux_signal[NSIG] = {
+    0, LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT,
+    LINUX_SIGILL, LINUX_SIGTRAP, LINUX_SIGABRT, 0,
+    LINUX_SIGFPE, LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV, 
+    0, LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM,
+    LINUX_SIGURG, LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT,	
+    LINUX_SIGCHLD, LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO, 
+    LINUX_SIGXCPU, LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF, 
+    LINUX_SIGWINCH, 0, LINUX_SIGUSR1, LINUX_SIGUSR2
+};
+
+int linux_to_bsd_signal[LINUX_NSIG] = {
+    0, SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT,
+    SIGFPE, SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM, 
+    SIGBUS, SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGIO,
+    SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, SIGURG, SIGURG, 0
+};
+
+int linux_fixup(int **stack_base, struct image_params *iparams)
+{
+    int *argv, *envp;
+
+    argv = *stack_base;
+    envp = *stack_base + (iparams->argc + 1);
+    (*stack_base)--;
+    **stack_base = (int)envp;
+    (*stack_base)--;
+    **stack_base = (int)argv;
+    (*stack_base)--;
+    **stack_base = (int)iparams->argc;
+}
+
+struct sysentvec linux_sysvec = {
+    sizeof (linux_sysent) / sizeof(linux_sysent[0]),
+    linux_sysent,
+    0xff,
+    NSIG,
+    bsd_to_linux_signal,
+    ELAST, 
+    bsd_to_linux_errno,
+    linux_fixup
+};
diff --git a/sys/modules/Makefile b/sys/modules/Makefile
index da92672..c9ebc81 100644
--- a/sys/modules/Makefile
+++ b/sys/modules/Makefile
@@ -1,7 +1,7 @@
-#	$Id: Makefile,v 1.9 1995/03/20 19:25:38 wollman Exp $
+#	$Id: Makefile,v 1.10 1995/06/13 20:51:13 wollman Exp $
 
 SUBDIR=	cd9660 coff fdesc ibcs2 if_disc if_ppp if_sl if_tun \
-	ipfw kernfs msdos nfs nullfs \
+	ipfw kernfs linux msdos nfs nullfs \
 	portal procfs socksys syscons umapfs union
 #
 # Doesn't work:
diff --git a/sys/modules/linux/Makefile b/sys/modules/linux/Makefile
new file mode 100644
index 0000000..11650c5
--- /dev/null
+++ b/sys/modules/linux/Makefile
@@ -0,0 +1,16 @@
+#	$Id$
+
+.PATH:	${.CURDIR}/../../sys/i386/linux
+KMOD=	linux_mod
+SRCS= 	linux.c linux_file.c linux_ioctl.c linux_misc.c linux_signal.c \
+	linux_generic.c linux_ipc.c linux_socket.c linux_stats.c \
+	linux_dummy.c linux_sysent.c imgact_linux.c vnode_if.h
+NOMAN=
+CFLAGS+= -DLKM -I. -DCOMPAT_LINUX -DSYSVSHM #-DSYSVMSG -DSYSVSEM #-DDEBUG
+CLEANFILES+= vnode_if.h vnode_if.c
+
+afterinstall:
+	${INSTALL} -c -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
+	${.CURDIR}/linux /usr/bin
+
+.include <bsd.kmod.mk>
diff --git a/sys/modules/linux/linux b/sys/modules/linux/linux
new file mode 100644
index 0000000..e4c3606
--- /dev/null
+++ b/sys/modules/linux/linux
@@ -0,0 +1,3 @@
+#!/bin/sh
+# $Id$
+modload -e linux_init /lkm/linux_mod.o
diff --git a/sys/modules/linux/linux.c b/sys/modules/linux/linux.c
new file mode 100644
index 0000000..183ad3e
--- /dev/null
+++ b/sys/modules/linux/linux.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 1994 Søren Schmidt
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough 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.
+ *
+ *	$Id: linux.c,v 1.1 1994/10/14 08:46:12 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/conf.h>
+#include <sys/sysent.h>
+#include <sys/lkm.h>
+#include <sys/errno.h>
+
+extern const struct execsw linux_execsw;
+
+MOD_EXEC("linux_emulator", -1, (struct execsw*)&linux_execsw)
+
+linux_load(struct lkm_table *lkmtp, int cmd)
+{
+	uprintf("Linux emulator installed\n");
+	return 0;
+}
+
+linux_unload(struct lkm_table *lkmtp, int cmd)
+{
+	uprintf("Linux emulator removed\n");
+	return 0;
+}
+
+linux_init(struct lkm_table *lkmtp, int cmd, int ver)
+{
+	DISPATCH(lkmtp, cmd, ver, linux_load, linux_unload, nosys);
+}
diff --git a/sys/modules/linux/linux.sh b/sys/modules/linux/linux.sh
new file mode 100644
index 0000000..e4c3606
--- /dev/null
+++ b/sys/modules/linux/linux.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+# $Id$
+modload -e linux_init /lkm/linux_mod.o