0768d01522
new experimental stripped-down version of plex86, which is now a user-code-only VM. I ripped out all the fancy stuff in plex86, such that under that right conditions, user-code (protection level 3) can run at near native speeds inside the plex86 VM. The general idea is that bochs emulates all the initial real-mode code, and guest kernel code (protection level 0). When it senses the right conditions (like the context switches to user-code), a shim is called to execute the guest inside the plex86 VM. All guest-generated faults/exceptions are then forwarded back to bochs to be handled in the emulator. Actually, I'm not yet adding the mods to the bochs code (other than the shim code which is in a separate file), until I hear that we're back in a more development mode with bochs after the 2.0 release. The plex86 subdirectory is really a separate project. It's just more convenient to co-develop it with bochs for now. Both projects are currently LGPL, but each should be taken to be a separate project, and have their own license file. Plex86 (it's only a kernel driver now) could ultimately be used with other projects, as it's modular. I talked with Bryce, and we both agreed it's OK to keep plex86 as a subdir in bochs for now.
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/*
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* plex86: run multiple x86 operating systems concurrently
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* Copyright (C) 1999-2003 Kevin P. Lawton
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*
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* guest_context.h: monitor stack frame after exception/interrupt
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __GUEST_CONTEXT_H__
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#define __GUEST_CONTEXT_H__
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#include "eflags.h"
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/* This is the guest context (from ring3) pushed on the monitor stack (ring0)
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* during an exception/interrupt. Part is pushed automatically by the
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* CPU, part by the interrupt handling code.
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*
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* Values are pushed starting with the end of this structure, towards
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* the beginning, since stack pushes descend in address.
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*/
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typedef struct {
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Bit32u gs;
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Bit32u fs;
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Bit32u ds;
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Bit32u es;
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Bit32u edi;
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Bit32u esi;
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Bit32u ebp;
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Bit32u dummy_esp;
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Bit32u ebx;
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Bit32u edx;
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Bit32u ecx;
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Bit32u eax;
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Bit32u vector;
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Bit32u error;
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Bit32u eip;
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Bit32u cs;
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eflags_t eflags;
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Bit32u esp;
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Bit32u ss;
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} guest_context_t;
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#endif /* __GUEST_CONTEXT_H__ */
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