mirror of
https://github.com/reactos/reactos.git
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167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2000 David Welch <welch@cwcom.net>
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*
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* Moved to MSVC-compatible inline assembler by Mike Nordell, 2003-12-25
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: ke_i386_bthread.c,v 1.1 2004/02/06 08:21:56 fireball Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/ke/i386/bthread.S
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* PURPOSE: Trap handlers
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* PROGRAMMER: David Welch (david.welch@seh.ox.ac.uk)
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*/
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/* INCLUDES ******************************************************************/
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#include <ddk/ntddk.h>
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#include <ddk/status.h>
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#include <internal/i386/segment.h>
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#include <internal/i386/fpu.h>
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#include <internal/ps.h>
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#include <ddk/defines.h>
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/* Values for contextflags */
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#define CONTEXT_i386 0x10000
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#ifndef CONTEXT_CONTROL
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#define CONTEXT_CONTROL (CONTEXT_i386 | 1)
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#endif
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#ifndef CONTEXT_INTEGER
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#define CONTEXT_INTEGER (CONTEXT_i386 | 2)
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#endif
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#ifndef CONTEXT_SEGMENTS
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#define CONTEXT_SEGMENTS (CONTEXT_i386 | 4)
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#endif
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#ifndef CONTEXT_FLOATING_POINT
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#define CONTEXT_FLOATING_POINT (CONTEXT_i386 | 8)
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#endif
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#ifndef CONTEXT_DEBUG_REGISTERS
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#define CONTEXT_DEBUG_REGISTERS (CONTEXT_i386 | 0x10)
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#endif
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#ifndef CONTEXT_FULL
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#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS)
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#endif
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/* FUNCTIONS *****************************************************************/
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void KeReturnFromSystemCallWithHook();
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VOID PiBeforeBeginThread(CONTEXT c);
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/*
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*
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*/
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__declspec(naked)
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VOID PsBeginThread(PKSTART_ROUTINE StartRoutine, PVOID StartContext)
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{
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/*
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* This isn't really a function, we are called as the return address
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* of the context switch function
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*/
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/*
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* Do the necessary prolog after a context switch
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*/
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__asm
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{
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call PiBeforeBeginThread
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/*
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* Call the actual start of the thread
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*/
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// We must NOT use the arguments by name. VC then uses EBP-relative
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// addressing, and with an EBP of 0 you can imagine what happens.
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mov ebx, 4[esp] // StartRoutine
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mov eax, 8[esp] // StartContext
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push eax
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call ebx /* Call the start routine */
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add esp, 4
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/*
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* Terminate the thread
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*/
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push eax
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call PsTerminateSystemThread
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add esp, 4
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}
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/* If that fails then bug check */
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KeBugCheck(0);
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/* And if that fails then loop */
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for (;;)
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; // forever
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}
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__declspec(naked)
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VOID PsBeginThreadWithContextInternal(VOID)
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{
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/*
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* This isn't really a function, we are called as the return
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* address of a context switch
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*/
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/*
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* Do the necessary prolog before the context switch
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*/
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__asm
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{
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call PiBeforeBeginThread
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/*
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* Load the context flags.
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*/
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pop ebx
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/*
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* Load the debugging registers
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*/
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test ebx, (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386)
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jz L1
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pop eax __asm mov dr0, eax
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pop eax __asm mov dr1, eax
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pop eax __asm mov dr2, eax
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pop eax __asm mov dr3, eax
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pop eax __asm mov dr6, eax
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pop eax __asm mov dr7, eax
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jmp L3
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L1:
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add esp, 24
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L3:
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/*
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* Load the floating point registers
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*/
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mov eax, HardwareMathSupport
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test eax,eax
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jz L2
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test ebx, (CONTEXT_FLOATING_POINT & ~CONTEXT_i386)
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jz L2
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frstor [esp]
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L2:
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add esp, 112
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/* Load the rest of the thread's user mode context. */
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mov eax, 0
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jmp KeReturnFromSystemCallWithHook
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}
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}
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