mirror of
https://github.com/reactos/reactos.git
synced 2024-10-31 03:48:17 +00:00
168 lines
3.9 KiB
C
168 lines
3.9 KiB
C
/*
|
|
* ReactOS kernel
|
|
* Copyright (C) 2000 David Welch <welch@cwcom.net>
|
|
*
|
|
* Moved to MSVC-compatible inline assembler by Mike Nordell, 2003-12-25
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
/* $Id: ke_i386_bthread.c,v 1.1 2004/02/06 08:21:56 fireball Exp $
|
|
*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS kernel
|
|
* FILE: ntoskrnl/ke/i386/bthread.S
|
|
* PURPOSE: Trap handlers
|
|
* PROGRAMMER: David Welch (david.welch@seh.ox.ac.uk)
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#include <ddk/ntddk.h>
|
|
#include <ddk/status.h>
|
|
#include <internal/i386/segment.h>
|
|
#include <internal/i386/fpu.h>
|
|
#include <internal/ps.h>
|
|
#include <ddk/defines.h>
|
|
|
|
/* Values for contextflags */
|
|
#define CONTEXT_i386 0x10000
|
|
#ifndef CONTEXT_CONTROL
|
|
#define CONTEXT_CONTROL (CONTEXT_i386 | 1)
|
|
#endif
|
|
#ifndef CONTEXT_INTEGER
|
|
#define CONTEXT_INTEGER (CONTEXT_i386 | 2)
|
|
#endif
|
|
#ifndef CONTEXT_SEGMENTS
|
|
#define CONTEXT_SEGMENTS (CONTEXT_i386 | 4)
|
|
#endif
|
|
#ifndef CONTEXT_FLOATING_POINT
|
|
#define CONTEXT_FLOATING_POINT (CONTEXT_i386 | 8)
|
|
#endif
|
|
#ifndef CONTEXT_DEBUG_REGISTERS
|
|
#define CONTEXT_DEBUG_REGISTERS (CONTEXT_i386 | 0x10)
|
|
#endif
|
|
#ifndef CONTEXT_FULL
|
|
#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS)
|
|
#endif
|
|
|
|
/* FUNCTIONS *****************************************************************/
|
|
|
|
void KeReturnFromSystemCallWithHook();
|
|
|
|
VOID PiBeforeBeginThread(CONTEXT c);
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
__declspec(naked)
|
|
VOID PsBeginThread(PKSTART_ROUTINE StartRoutine, PVOID StartContext)
|
|
{
|
|
/*
|
|
* This isn't really a function, we are called as the return address
|
|
* of the context switch function
|
|
*/
|
|
|
|
/*
|
|
* Do the necessary prolog after a context switch
|
|
*/
|
|
__asm
|
|
{
|
|
call PiBeforeBeginThread
|
|
|
|
/*
|
|
* Call the actual start of the thread
|
|
*/
|
|
// We must NOT use the arguments by name. VC then uses EBP-relative
|
|
// addressing, and with an EBP of 0 you can imagine what happens.
|
|
mov ebx, 4[esp] // StartRoutine
|
|
mov eax, 8[esp] // StartContext
|
|
push eax
|
|
call ebx /* Call the start routine */
|
|
add esp, 4
|
|
|
|
/*
|
|
* Terminate the thread
|
|
*/
|
|
push eax
|
|
call PsTerminateSystemThread
|
|
add esp, 4
|
|
|
|
}
|
|
|
|
/* If that fails then bug check */
|
|
KeBugCheck(0);
|
|
|
|
/* And if that fails then loop */
|
|
for (;;)
|
|
; // forever
|
|
}
|
|
|
|
|
|
__declspec(naked)
|
|
VOID PsBeginThreadWithContextInternal(VOID)
|
|
{
|
|
/*
|
|
* This isn't really a function, we are called as the return
|
|
* address of a context switch
|
|
*/
|
|
|
|
/*
|
|
* Do the necessary prolog before the context switch
|
|
*/
|
|
__asm
|
|
{
|
|
call PiBeforeBeginThread
|
|
|
|
/*
|
|
* Load the context flags.
|
|
*/
|
|
pop ebx
|
|
|
|
/*
|
|
* Load the debugging registers
|
|
*/
|
|
test ebx, (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386)
|
|
jz L1
|
|
pop eax __asm mov dr0, eax
|
|
pop eax __asm mov dr1, eax
|
|
pop eax __asm mov dr2, eax
|
|
pop eax __asm mov dr3, eax
|
|
pop eax __asm mov dr6, eax
|
|
pop eax __asm mov dr7, eax
|
|
jmp L3
|
|
L1:
|
|
add esp, 24
|
|
L3:
|
|
|
|
/*
|
|
* Load the floating point registers
|
|
*/
|
|
mov eax, HardwareMathSupport
|
|
test eax,eax
|
|
jz L2
|
|
test ebx, (CONTEXT_FLOATING_POINT & ~CONTEXT_i386)
|
|
jz L2
|
|
frstor [esp]
|
|
L2:
|
|
add esp, 112
|
|
|
|
/* Load the rest of the thread's user mode context. */
|
|
mov eax, 0
|
|
jmp KeReturnFromSystemCallWithHook
|
|
}
|
|
}
|
|
|