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.

2 files changed, 722 insertions, 0 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;
+}