[src/trunk]: src/lib/libarch/x86_64 Add and enable x86_64_iopl

[fvdl <fvdl%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/16bc2e4d2acc
branches:  trunk
changeset: 533571:16bc2e4d2acc
user:      fvdl <fvdl%NetBSD.org@localhost>
date:      Thu Jul 04 10:53:26 2002 +0000

description:
Add and enable x86_64_iopl

diffstat:

 lib/libarch/x86_64/Makefile.inc  |   6 +-
 lib/libarch/x86_64/x86_64_iopl.2 |  78 ++++++++++++++++++++++++++++++++++++++++
 lib/libarch/x86_64/x86_64_iopl.c |  53 +++++++++++++++++++++++++++
 3 files changed, 134 insertions(+), 3 deletions(-)

diffs (155 lines):

diff -r 7a77c99cf719 -r 16bc2e4d2acc lib/libarch/x86_64/Makefile.inc
--- a/lib/libarch/x86_64/Makefile.inc   Thu Jul 04 10:51:02 2002 +0000
+++ b/lib/libarch/x86_64/Makefile.inc   Thu Jul 04 10:53:26 2002 +0000
@@ -1,9 +1,9 @@
-#      $NetBSD: Makefile.inc,v 1.1 2002/06/18 08:29:35 fvdl Exp $
+#      $NetBSD: Makefile.inc,v 1.2 2002/07/04 10:53:26 fvdl Exp $
 
 .if (${MACHINE_ARCH} == "x86_64")
-SRCS+= x86_64_mtrr.c
+SRCS+= x86_64_mtrr.c x86_64_iopl.c
 .endif
 
-MAN+=  x86_64_get_mtrr.2
+MAN+=  x86_64_get_mtrr.2 x86_64_iopl.2
 
 MLINKS+=x86_64_get_mtrr.2 x86_64_set_mtrr.2
diff -r 7a77c99cf719 -r 16bc2e4d2acc lib/libarch/x86_64/x86_64_iopl.2
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libarch/x86_64/x86_64_iopl.2  Thu Jul 04 10:53:26 2002 +0000
@@ -0,0 +1,78 @@
+.\"    $NetBSD: x86_64_iopl.2,v 1.1 2002/07/04 10:53:26 fvdl Exp $
+.\"
+.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by John T. Kohl and Charles M. Hannum.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"        This product includes software developed by the NetBSD
+.\"        Foundation, Inc. and its contributors.
+.\" 4. Neither the name of The NetBSD Foundation nor the names of its
+.\"    contributors may be used to endorse or promote products derived
+.\"    from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd October 14, 1995
+.Dt I386_IOPL 2 i386
+.Os
+.Sh NAME
+.Nm i386_iopl
+.Nd change the i386 I/O privilege level
+.Sh LIBRARY
+.Lb libi386
+.Sh SYNOPSIS
+.Fd #include \*[Lt]sys/types.h\*[Gt]
+.Fd #include \*[Lt]machine/sysarch.h\*[Gt]
+.Ft int
+.Fn i386_iopl "int iopl"
+.Sh DESCRIPTION
+.Fn i386_iopl
+sets the i386 I/O privilege level to the value specified by
+.Ar iopl .
+This call is restricted to the super-user.
+.Sh RETURN VALUES
+Upon successful completion,
+.Fn i386_iopl
+returns 0.
+Otherwise, a value of -1 is returned and the global
+variable
+.Va errno
+is set to indicate the error.
+.Sh ERRORS
+.Fn i386_iopl
+will fail if:
+.Bl -tag -width [EINVAL]
+.It Bq Er EPERM
+The caller was not the super-user, or the operation was not permitted at the
+current security level.
+.El
+.Sh SEE ALSO
+.Xr i386_get_ioperm 2 ,
+.Xr i386_set_ioperm 2
+.Sh REFERENCES
+i386 Microprocessor Programmer's Reference Manual, Intel
+.Sh WARNING
+You can really hose your machine if you enable user-level I/O and
+write to hardware ports without care.
diff -r 7a77c99cf719 -r 16bc2e4d2acc lib/libarch/x86_64/x86_64_iopl.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libarch/x86_64/x86_64_iopl.c  Thu Jul 04 10:53:26 2002 +0000
@@ -0,0 +1,53 @@
+/*     $NetBSD: x86_64_iopl.c,v 1.1 2002/07/04 10:53:26 fvdl Exp $     */
+
+/*-
+ * Copyright (c) 1996 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by John T. Kohl and Charles M. Hannum.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <machine/sysarch.h>
+
+int
+x86_64_iopl(iopl)
+       int iopl;
+{
+       struct x86_64_iopl_args p;
+
+       p.iopl = iopl;
+
+       return sysarch(X86_64_IOPL, (void *)&p);
+}