f1532aadee
depend on this. The linux ABI emulator tries to use it for some linux binaries too. VM86 had a bigger cost than this and it was made default a while ago. Reviewed by: jhb, imp
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/*-
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* Copyright (c) 1997 Jonathan Lemon
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _I386_PCB_EXT_H_
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#define _I386_PCB_EXT_H_
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/*
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* Extension to the 386 process control block
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*/
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#include <machine/tss.h>
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#include <machine/vm86.h>
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#include <machine/segments.h>
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struct pcb_ext {
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struct segment_descriptor ext_tssd; /* tss descriptor */
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struct i386tss ext_tss; /* per-process i386tss */
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caddr_t ext_iomap; /* i/o permission bitmap */
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struct vm86_kernel ext_vm86; /* vm86 area */
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};
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struct pcb_ldt {
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caddr_t ldt_base;
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int ldt_len;
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int ldt_refcnt;
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u_long ldt_active;
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struct segment_descriptor ldt_sd;
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};
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#ifdef _KERNEL
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void set_user_ldt __P((struct pcb *));
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struct pcb_ldt *user_ldt_alloc __P((struct pcb *, int));
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void user_ldt_free __P((struct pcb *));
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#endif
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#endif /* _I386_PCB_EXT_H_ */
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