mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 16:20:37 +00:00
468 lines
6.8 KiB
C
468 lines
6.8 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, 2003-12-26
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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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/*
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* FILE: ntoskrnl/ke/i386/vm86_sup.S
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* PURPOSE: V86 mode support
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* PROGRAMMER: David Welch (welch@cwcom.net)
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* UPDATE HISTORY:
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* Created 09/10/00
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*/
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/* INCLUDES ******************************************************************/
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#pragma hdrstop
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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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#include <internal/v86m.h>
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#include <ntos/tss.h>
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#include <internal/trap.h>
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#include <internal/ps.h>
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#include <roscfg.h>
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#include <internal/ntoskrnl.h>
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#include <internal/i386/segment.h>
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void KiV86Complete(void);
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void KiTrapHandler(void);
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void KiDoubleFaultHandler(void);
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extern int KiPcrInitDone;
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/*
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* Epilog for exception handlers
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*/
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__declspec(naked)
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void KiTrapEpilog()
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{
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__asm
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{
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cmp eax, 1 /* Check for v86 recovery */
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jne _KiTrapRet
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jmp KiV86Complete
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_KiTrapRet:
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/* Skip debug information and unsaved registers */
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add esp, 0x30
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pop gs
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pop es
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pop ds
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pop edx
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pop ecx
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pop eax
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/* Restore the old previous mode */
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pop ebx
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mov ss:KTHREAD_PREVIOUS_MODE[esi], bl
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/* Restore the old exception handler list */
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pop ebx
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mov fs:KPCR_EXCEPTION_LIST, ebx
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pop fs
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pop edi
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pop esi
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pop ebx
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pop ebp
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add esp, 4 /* Ignore error code */
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iretd
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}
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}
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__declspec(naked)
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void KiTrapProlog()
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{
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__asm
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{
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push edi
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push fs
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/*
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* Check that the PCR exists, very early in the boot process it may
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* not
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*/
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cmp ss:KiPcrInitDone, 0
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je L5_
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/* Load the PCR selector into fs */
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mov ebx, PCR_SELECTOR
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mov fs, bx
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/* Save the old exception list */
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mov ebx, fs:KPCR_EXCEPTION_LIST
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push ebx
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/* Put the exception handler chain terminator */
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mov dword ptr fs:KPCR_EXCEPTION_LIST, 0xffffffff
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/* Get a pointer to the current thread */
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mov edi, fs:KPCR_CURRENT_THREAD
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/* The current thread may be NULL early in the boot process */
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cmp edi, 0
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je L4_
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/* Save the old previous mode */
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xor ebx, ebx
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mov bl, ss:KTHREAD_PREVIOUS_MODE[edi]
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push ebx
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/* Set the new previous mode based on the saved CS selector */
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mov ebx, 0x24[esp]
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and ebx, 0x0000FFFF
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cmp ebx, KERNEL_CS
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jne L1_
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mov ss:KTHREAD_PREVIOUS_MODE[edi], KernelMode
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jmp L3_
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L1_:
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mov ss:KTHREAD_PREVIOUS_MODE[edi], UserMode
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L3_:
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/* Save other registers */
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push eax
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push ecx
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push edx
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push ds
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push es
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push gs
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push 0 /* DR7 */
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push 0 /* DR6 */
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push 0 /* DR3 */
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push 0 /* DR2 */
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push 0 /* DR1 */
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push 0 /* DR0 */
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push 0 /* XXX: TempESP */
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push 0 /* XXX: TempCS */
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push 0 /* XXX: DebugPointer */
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push 0 /* XXX: DebugArgMark */
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mov ebx, 0x60[esp]
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push ebx /* XXX: DebugEIP */
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push ebp /* XXX: DebugEBP */
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/* Load the segment registers */
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mov ebx, KERNEL_DS
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mov ds, bx
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mov es, bx
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mov gs, bx
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/* Set ES to kernel segment */
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mov bx, KERNEL_DS
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mov es, bx
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mov ebx, esp
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mov ebp, esp
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/* Save the old trap frame. */
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cmp edi, 0
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je L7_
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mov edx, ss:KTHREAD_TRAP_FRAME[edi]
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push edx
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jmp L8_
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L7_:
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push 0
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L8_:
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/* Save a pointer to the trap frame in the current KTHREAD */
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cmp edi, 0
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je L6_
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mov ss:KTHREAD_TRAP_FRAME[edi], ebx
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L6_:
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/* Call the C exception handler */
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push esi
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push ebx
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call KiTrapHandler
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add esp, 8
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/* Get a pointer to the current thread */
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mov esi, fs:KPCR_CURRENT_THREAD
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/* Restore the old trap frame pointer */
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pop ebx
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mov KTHREAD_TRAP_FRAME[esi], ebx
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/* Return to the caller */
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jmp KiTrapEpilog
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/* Handle the no-pcr case out of line */
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L5_:
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push 0
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/* Handle the no-thread case out of line */
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L4_:
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push 0
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jmp L3_
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} // end of __asm block
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}
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__declspec(naked)
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void KiTrap0()
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{
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__asm
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{
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/* No error code */
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 0
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap1()
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{
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__asm
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{
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/* No error code */
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 1
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap2()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 2
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap3()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 3
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap4()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 4
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap5()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 5
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap6()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 6
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap7()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 7
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap8()
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{
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__asm
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{
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call KiDoubleFaultHandler
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iretd
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}
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}
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__declspec(naked)
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void KiTrap9()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 9
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap10()
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{
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__asm
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{
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push ebp
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push ebx
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push esi
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mov esi, 10
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap11()
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{
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__asm
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{
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push ebp
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push ebx
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push esi
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mov esi, 11
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap12()
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{
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__asm
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{
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push ebp
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push ebx
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push esi
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mov esi, 12
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap13()
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{
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__asm
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{
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push ebp
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push ebx
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push esi
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mov esi, 13
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap14()
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{
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__asm
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{
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push ebp
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push ebx
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push esi
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mov esi, 14
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap15()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 15
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrap16()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 16
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jmp KiTrapProlog
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}
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}
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__declspec(naked)
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void KiTrapUnknown()
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{
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__asm
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{
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push 0
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push ebp
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push ebx
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push esi
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mov esi, 255
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jmp KiTrapProlog
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}
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}
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/* EOF */
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