diff options
author | dg <dg@FreeBSD.org> | 1994-01-31 12:05:32 +0000 |
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committer | dg <dg@FreeBSD.org> | 1994-01-31 12:05:32 +0000 |
commit | 5e9419ef4a9d0d93eaa2cfb05365303b9f00f5b0 (patch) | |
tree | c34347ee20ebb5a3b10ee3a59bc01e9a6a000c16 /lib/libc | |
parent | 8df5d2c1f8c514a14d5728e5a9f9e30e48ae90eb (diff) | |
download | FreeBSD-src-5e9419ef4a9d0d93eaa2cfb05365303b9f00f5b0.zip FreeBSD-src-5e9419ef4a9d0d93eaa2cfb05365303b9f00f5b0.tar.gz |
WINE/user LDT support from John Brezak, ported to FreeBSD by Jeffrey Hsu
<hsu@soda.berkeley.edu>.
Diffstat (limited to 'lib/libc')
-rw-r--r-- | lib/libc/amd64/sys/Makefile.inc | 9 | ||||
-rw-r--r-- | lib/libc/i386/sys/Makefile.inc | 9 | ||||
-rw-r--r-- | lib/libc/i386/sys/i386_get_ldt.2 | 98 | ||||
-rw-r--r-- | lib/libc/i386/sys/i386_get_ldt.c | 50 | ||||
-rw-r--r-- | lib/libc/i386/sys/i386_set_ldt.c | 50 |
5 files changed, 216 insertions, 0 deletions
diff --git a/lib/libc/amd64/sys/Makefile.inc b/lib/libc/amd64/sys/Makefile.inc new file mode 100644 index 0000000..1b1eeb3 --- /dev/null +++ b/lib/libc/amd64/sys/Makefile.inc @@ -0,0 +1,9 @@ +# Makefile.inc,v 1.1 1993/09/03 19:04:23 jtc Exp + +.PATH: ${.CURDIR}/${MACHINE}/sys + +SRCS+= i386_get_ldt.c i386_set_ldt.c + +MAN2+= i386/sys/i386_get_ldt.2 + +MLINKS+=i386_get_ldt.2 i386_set_ldt.2 diff --git a/lib/libc/i386/sys/Makefile.inc b/lib/libc/i386/sys/Makefile.inc new file mode 100644 index 0000000..1b1eeb3 --- /dev/null +++ b/lib/libc/i386/sys/Makefile.inc @@ -0,0 +1,9 @@ +# Makefile.inc,v 1.1 1993/09/03 19:04:23 jtc Exp + +.PATH: ${.CURDIR}/${MACHINE}/sys + +SRCS+= i386_get_ldt.c i386_set_ldt.c + +MAN2+= i386/sys/i386_get_ldt.2 + +MLINKS+=i386_get_ldt.2 i386_set_ldt.2 diff --git a/lib/libc/i386/sys/i386_get_ldt.2 b/lib/libc/i386/sys/i386_get_ldt.2 new file mode 100644 index 0000000..ade7e10 --- /dev/null +++ b/lib/libc/i386/sys/i386_get_ldt.2 @@ -0,0 +1,98 @@ +.\" Copyright (c) 1980, 1991 Regents of the University of California. +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. +.\" +.\" from: @(#)fork.2 6.5 (Berkeley) 3/10/91 +.\" $Id: i386_get_ldt.2,v 1.2 1993/10/09 00:59:10 cgd Exp $ +.\" +.Dd September 20, 1993 +.Dt I386_GET_LDT 2 +.Os FreeBSD +.Sh NAME +.Nm i386_get_ldt , +.Nm i386_set_ldt +.Nd manage i386 per-process Local Descriptor Table entries +.Sh SYNOPSIS +.Fd #include <machine/segments.h> +.Fd #include <machine/sysarch.h> +.Ft int +.Fn i386_get_ldt "int start_sel" "union descriptor *descs" "int num_sels" +.Ft int +.Fn i386_set_ldt "int start_sel" "union descriptor *descs" "int num_sels" +.Sh DESCRIPTION +.Fn i386_get_ldt +will return the list of i386 descriptors that the process has in its +LDT. +.Fn i386_set_ldt +will set a list of i386 descriptors for the current process in its +LDT. +Both routines accept a starting selector number +.Fa start_sel +, an array of memory that +will contain the descriptors to be set or returned +.Fa descs +, and the number of entries to set or return +.Fa num_sels . +.Pp +The argument +.Fa descs +can be either segment_descriptor or gate_descriptor and are defined in +.Fd <i386/segments.h> . +These structures are defined by the architecure +as disjoint bit-fields, so care must be taken in constructing them. +.Sh RETURN VALUES +Upon successful completion, +.Fn i386_get_ldt +returns the number of descriptors currently in the LDT. +.Fn i386_set_ldt +returns the first selector set. +Otherwise, a value of -1 is returned and the global +variable +.Va errno +is set to indicate the error. +.Sh ERRORS +.Fn i386_get_ldt +and +.Fn i386_set_ldt +will fail if: +.Bl -tag -width [EINVAL] +.It Bq Er EINVAL +An inappropriate parameter was used for +.Fa start_sel +or +.Fa num_sels . +.It Bq Er EACESS +The caller attempted to use a descriptor that would +circumvent protection or cause a failure. +.El +.Sh REFERENCES +i386 Microprocessor Programmer's Reference Manual, Intel +.Sh WARNING +You can really hose your process using this. diff --git a/lib/libc/i386/sys/i386_get_ldt.c b/lib/libc/i386/sys/i386_get_ldt.c new file mode 100644 index 0000000..989c6b6 --- /dev/null +++ b/lib/libc/i386/sys/i386_get_ldt.c @@ -0,0 +1,50 @@ +/* + * Copyright (c) 1993 John Brezak + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <sys/cdefs.h> +#include <machine/segments.h> +#include <machine/sysarch.h> + +struct parms { + int start; + union descriptor *descs; + int num; +}; + +int +i386_get_ldt(int start, union descriptor *descs, int num) +{ + struct parms p; + + p.start = start; + p.descs = descs; + p.num = num; + + return sysarch(I386_GET_LDT, (char *)&p); +} diff --git a/lib/libc/i386/sys/i386_set_ldt.c b/lib/libc/i386/sys/i386_set_ldt.c new file mode 100644 index 0000000..377437e --- /dev/null +++ b/lib/libc/i386/sys/i386_set_ldt.c @@ -0,0 +1,50 @@ +/* + * Copyright (c) 1993 John Brezak + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <sys/cdefs.h> +#include <machine/segments.h> +#include <machine/sysarch.h> + +struct parms { + int start; + union descriptor *descs; + int num; +}; + +int +i386_set_ldt(int start, union descriptor *descs, int num) +{ + struct parms p; + + p.start = start; + p.descs = descs; + p.num = num; + + return sysarch(I386_SET_LDT, (char *)&p); +} |