mirror of
https://github.com/reactos/reactos.git
synced 2024-12-27 01:24:38 +00:00
299 lines
6.6 KiB
C
299 lines
6.6 KiB
C
/*
|
|
* ReactOS kernel
|
|
* Copyright (C) 2000 David Welch <welch@cwcom.net>
|
|
*
|
|
* Moved to MSVC-compatible inline assembler by Mike Nordell, 2003-12-26
|
|
*
|
|
* 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.
|
|
*/
|
|
/*
|
|
* FILE: ntoskrnl/ke/i386/vm86_sup.S
|
|
* PURPOSE: V86 mode support
|
|
* PROGRAMMER: David Welch (welch@cwcom.net)
|
|
* UPDATE HISTORY:
|
|
* Created 09/10/00
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#pragma hdrstop
|
|
|
|
#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>
|
|
#include <internal/v86m.h>
|
|
#include <ntos/tss.h>
|
|
//#include <ntos/service.h>
|
|
#include <internal/trap.h>
|
|
#include <internal/ps.h>
|
|
|
|
#include <roscfg.h>
|
|
#include <internal/ntoskrnl.h>
|
|
#include <internal/i386/segment.h>
|
|
|
|
|
|
#define EXCEPTION_UNWINDING 0x02
|
|
|
|
#define EREC_FLAGS 0x04
|
|
|
|
#define ExceptionContinueExecution 0
|
|
#define ExceptionContinueSearch 1
|
|
#define ExceptionNestedException 2
|
|
#define ExceptionCollidedUnwind 3
|
|
|
|
//.globl _RtlpExecuteHandlerForException
|
|
//.globl _RtlpExecuteHandlerForUnwind
|
|
|
|
#define CONTEXT_FLAGS 0x00
|
|
#define CONTEXT_SEGGS 0x8C
|
|
#define CONTEXT_SEGFS 0x90
|
|
#define CONTEXT_SEGES 0x94
|
|
#define CONTEXT_SEGDS 0x98
|
|
#define CONTEXT_EDI 0x9C
|
|
#define CONTEXT_ESI 0xA0
|
|
#define CONTEXT_EBX 0xA4
|
|
#define CONTEXT_EDX 0xA8
|
|
#define CONTEXT_ECX 0xAC
|
|
#define CONTEXT_EAX 0xB0
|
|
#define CONTEXT_EBP 0xB4
|
|
#define CONTEXT_EIP 0xB8
|
|
#define CONTEXT_SEGCS 0xBC
|
|
#define CONTEXT_EFLAGS 0xC0
|
|
#define CONTEXT_ESP 0xC4
|
|
#define CONTEXT_SEGSS 0xC8
|
|
|
|
|
|
#define RCC_CONTEXT 0x08
|
|
|
|
|
|
VOID STDCALL
|
|
AsmDebug(ULONG Value);
|
|
|
|
|
|
// EAX = value to print
|
|
__declspec(naked)
|
|
void do_debug()
|
|
{
|
|
__asm
|
|
{
|
|
pusha
|
|
push eax
|
|
call AsmDebug
|
|
popa
|
|
ret
|
|
}
|
|
}
|
|
|
|
|
|
#define REH_ERECORD 0x08
|
|
#define REH_RFRAME 0x0C
|
|
#define REH_CONTEXT 0x10
|
|
#define REH_DCONTEXT 0x14
|
|
#define REH_EROUTINE 0x18
|
|
|
|
// Parameters:
|
|
// None
|
|
// Registers:
|
|
// [EBP+08h] - PEXCEPTION_RECORD ExceptionRecord
|
|
// [EBP+0Ch] - PEXCEPTION_REGISTRATION RegistrationFrame
|
|
// [EBP+10h] - PVOID Context
|
|
// [EBP+14h] - PVOID DispatcherContext
|
|
// [EBP+18h] - PEXCEPTION_HANDLER ExceptionRoutine
|
|
// EDX - Address of protecting exception handler
|
|
// Returns:
|
|
// EXCEPTION_DISPOSITION
|
|
// Notes:
|
|
// Setup the protecting exception handler and call the exception
|
|
// handler in the right context.
|
|
__declspec(naked)
|
|
void RtlpExecuteHandler()
|
|
{
|
|
__asm
|
|
{
|
|
push ebp
|
|
mov ebp, esp
|
|
push REH_RFRAME[ebp]
|
|
|
|
push edx
|
|
push fs:0x0
|
|
mov fs:0x0, esp
|
|
|
|
// Prepare to call the exception handler
|
|
push REH_DCONTEXT[ebp]
|
|
push REH_CONTEXT[ebp]
|
|
push REH_RFRAME[ebp]
|
|
push REH_ERECORD[ebp]
|
|
|
|
// Now call the exception handler
|
|
mov eax, REH_EROUTINE[ebp]
|
|
call eax
|
|
|
|
cmp fs:0x0, -1
|
|
jne reh_stack_looks_ok
|
|
|
|
// This should not happen
|
|
push 0
|
|
push 0
|
|
push 0
|
|
push 0
|
|
call RtlAssert
|
|
|
|
reh_loop:
|
|
jmp reh_loop
|
|
|
|
reh_stack_looks_ok:
|
|
mov esp, fs:0x0
|
|
|
|
// Return to the 'front-end' for this function
|
|
pop dword ptr fs:0x0
|
|
mov esp, ebp
|
|
pop ebp
|
|
ret
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
|
|
#endif // 0
|
|
|
|
#define REP_ERECORD 0x04
|
|
#define REP_RFRAME 0x08
|
|
#define REP_CONTEXT 0x0C
|
|
#define REP_DCONTEXT 0x10
|
|
|
|
// Parameters:
|
|
// [ESP+04h] - PEXCEPTION_RECORD ExceptionRecord
|
|
// [ESP+08h] - PEXCEPTION_REGISTRATION RegistrationFrame
|
|
// [ESP+0Ch] - PCONTEXT Context
|
|
// [ESP+10h] - PVOID DispatcherContext
|
|
// Registers:
|
|
// None
|
|
// Returns:
|
|
// EXCEPTION_DISPOSITION
|
|
// Notes:
|
|
// This exception handler protects the exception handling
|
|
// mechanism by detecting nested exceptions.
|
|
__declspec(naked)
|
|
void RtlpExceptionProtector()
|
|
{
|
|
__asm
|
|
{
|
|
mov eax, ExceptionContinueSearch
|
|
mov ecx, REP_ERECORD[esp]
|
|
test EREC_FLAGS[ecx], EXCEPTION_UNWINDING
|
|
jnz rep_end
|
|
|
|
// Unwinding is not taking place, so return ExceptionNestedException
|
|
|
|
// Set DispatcherContext field to the exception registration for the
|
|
// exception handler that executed when a nested exception occurred
|
|
mov ecx, REP_DCONTEXT[esp]
|
|
mov eax, REP_RFRAME[esp]
|
|
mov [ecx], eax
|
|
mov eax, ExceptionNestedException
|
|
|
|
rep_end:
|
|
ret
|
|
}
|
|
}
|
|
|
|
|
|
// Parameters:
|
|
// [ESP+04h] - PEXCEPTION_RECORD ExceptionRecord
|
|
// [ESP+08h] - PEXCEPTION_REGISTRATION RegistrationFrame
|
|
// [ESP+0Ch] - PCONTEXT Context
|
|
// [ESP+10h] - PVOID DispatcherContext
|
|
// [ESP+14h] - PEXCEPTION_HANDLER ExceptionHandler
|
|
// Registers:
|
|
// None
|
|
// Returns:
|
|
// EXCEPTION_DISPOSITION
|
|
// Notes:
|
|
// Front-end
|
|
__declspec(naked)
|
|
void RtlpExecuteHandlerForException()
|
|
{
|
|
__asm
|
|
{
|
|
mov edx, RtlpExceptionProtector
|
|
jmp RtlpExecuteHandler
|
|
}
|
|
}
|
|
|
|
|
|
#define RUP_ERECORD 0x04
|
|
#define RUP_RFRAME 0x08
|
|
#define RUP_CONTEXT 0x0C
|
|
#define RUP_DCONTEXT 0x10
|
|
|
|
// Parameters:
|
|
// [ESP+04h] - PEXCEPTION_RECORD ExceptionRecord
|
|
// [ESP+08h] - PEXCEPTION_REGISTRATION RegistrationFrame
|
|
// [ESP+0Ch] - PCONTEXT Context
|
|
// [ESP+10h] - PVOID DispatcherContext
|
|
// Registers:
|
|
// None
|
|
// Returns:
|
|
// EXCEPTION_DISPOSITION
|
|
// Notes:
|
|
// This exception handler protects the exception handling
|
|
// mechanism by detecting collided unwinds.
|
|
__declspec(naked)
|
|
void RtlpUnwindProtector()
|
|
{
|
|
__asm
|
|
{
|
|
mov eax, ExceptionContinueSearch
|
|
mov RUP_ERECORD[esp], ecx
|
|
test EREC_FLAGS[ecx], EXCEPTION_UNWINDING
|
|
jz rup_end
|
|
|
|
// Unwinding is taking place, so return ExceptionCollidedUnwind
|
|
|
|
mov ecx, RUP_RFRAME[esp]
|
|
mov edx, RUP_DCONTEXT[esp]
|
|
|
|
// Set DispatcherContext field to the exception registration for the
|
|
// exception handler that executed when a collision occurred
|
|
mov eax, RUP_RFRAME[ecx]
|
|
mov [edx], eax
|
|
mov eax, ExceptionCollidedUnwind
|
|
|
|
rup_end:
|
|
ret
|
|
}
|
|
}
|
|
|
|
|
|
// Parameters:
|
|
// [ESP+04h] - PEXCEPTION_RECORD ExceptionRecord
|
|
// [ESP+08h] - PEXCEPTION_REGISTRATION RegistrationFrame
|
|
// [ESP+0Ch] - PCONTEXT Context
|
|
// [ESP+10h] - PVOID DispatcherContext
|
|
// [ESP+14h] - PEXCEPTION_HANDLER ExceptionHandler
|
|
// Registers:
|
|
// None
|
|
// Returns:
|
|
// EXCEPTION_DISPOSITION
|
|
__declspec(naked)
|
|
void RtlpExecuteHandlerForUnwind()
|
|
{
|
|
__asm mov edx, RtlpUnwindProtector
|
|
__asm jmp RtlpExecuteHandler
|
|
}
|
|
|