mirror of
https://github.com/reactos/reactos.git
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325 lines
7.2 KiB
C
325 lines
7.2 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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* Converted to MSVC-compatible inline assembler by Mike Nordell, 2003.
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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: MSVC6/ntoskrnl/ke_i386_syscall.c
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* based on ntoskrnl/ke/i386/syscall.s
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* PURPOSE: syscall dispatching and 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 <ntos/service.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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#define KernelMode (0)
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#define UserMode (1)
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// TMN: Replicated here to reduce mess-time
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#ifdef STATUS_INVALID_SYSTEM_SERVICE
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#undef STATUS_INVALID_SYSTEM_SERVICE
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#endif
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#define STATUS_INVALID_SYSTEM_SERVICE 0xc000001c
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/*
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*
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*/
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void KiServiceCheck (ULONG Nr);
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ULONG KiAfterSystemCallHook(ULONG NtStatus, PKTRAP_FRAME TrapFrame);
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VOID KiSystemCallHook(ULONG Nr, ...);
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void KeReturnFromSystemCallWithHook();
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void KeReturnFromSystemCall();
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__declspec(naked)
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void interrupt_handler2e(void)
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{
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__asm
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{
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/* Construct a trap frame on the stack */
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/* 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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push edi
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push fs
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/* Load 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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/* Set 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 esi, fs:KPCR_CURRENT_THREAD
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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[esi]
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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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#if 0
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// TODO: Verify implementation change and use this code path
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// to remove two conditional jumps.
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setnz bl
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mov ss:KTHREAD_PREVIOUS_MODE[esi], bl
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#else
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jne L1
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mov ss:KTHREAD_PREVIOUS_MODE[esi], KernelMode
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jmp L3
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L1:
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mov ss:KTHREAD_PREVIOUS_MODE[esi], UserMode
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L3:
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#endif
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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 /* DebugEIP */
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push ebp /* DebugEBP */
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/* Load the segment registers */
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mov bx, 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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/*
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* Save the old trap frame pointer over where we would save the EDX
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* register.
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*/
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mov ebx, KTHREAD_TRAP_FRAME[esi]
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mov 0x3C[esp], ebx
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/* Save a pointer to the trap frame in the TCB */
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mov KTHREAD_TRAP_FRAME[esi], esp
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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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/* Allocate new Kernel stack frame */
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mov ebp, esp
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/* Users's current stack frame pointer is source */
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mov esi, edx
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/* Determine system service table to use */
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cmp eax, 0x0fff
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ja new_useShadowTable
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/* Check to see if EAX is valid/inrange */
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cmp eax, es:KeServiceDescriptorTable + 8
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jbe new_serviceInRange
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mov eax, STATUS_INVALID_SYSTEM_SERVICE
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jmp KeReturnFromSystemCall
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new_serviceInRange:
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/* Allocate room for argument list from kernel stack */
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mov ecx, es:KeServiceDescriptorTable + 12
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mov ecx, es:[ecx + eax * 4]
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sub esp, ecx
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/* Copy the arguments from the user stack to the kernel stack */
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mov edi, esp
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cld
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repe movsb
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/* DS is now also kernel segment */
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mov ds, bx
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/* Call system call hook */
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push eax
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call KiSystemCallHook
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pop eax
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/* Make the system service call */
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mov ecx, es:KeServiceDescriptorTable
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mov eax, es:[ecx + eax * 4]
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call eax
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#if CHECKED
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/* Bump Service Counter */
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#endif
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/* Deallocate the kernel stack frame */
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mov esp, ebp
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/* Call the post system call hook and deliver any pending APCs */
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push ebp
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push eax
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call KiAfterSystemCallHook
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add esp, 8
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jmp KeReturnFromSystemCall
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new_useShadowTable:
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sub eax, 0x1000
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/* Check to see if EAX is valid/inrange */
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cmp eax, es:KeServiceDescriptorTableShadow + 24
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jbe new_shadowServiceInRange
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mov eax, STATUS_INVALID_SYSTEM_SERVICE
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jmp KeReturnFromSystemCall
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new_shadowServiceInRange:
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/* Allocate room for argument list from kernel stack */
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mov ecx, es:KeServiceDescriptorTableShadow + 28
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mov ecx, es:[ecx + eax * 4]
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sub esp, ecx
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/* Copy the arguments from the user stack to the kernel stack */
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mov edi, esp
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cld
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repe movsb
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/* DS is now also kernel segment */
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mov ds, bx
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/* Call system call hook */
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// pushl %eax
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// call _KiSystemCallHook
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// popl %eax
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/* Call service check routine */
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push eax
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call KiServiceCheck
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pop eax
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/* Make the system service call */
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mov ecx, es:KeServiceDescriptorTableShadow + 16
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mov eax, es:[ecx + eax * 4]
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call eax
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#if CHECKED
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/* Bump Service Counter */
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#endif
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/* Deallocate the kernel stack frame */
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mov esp, ebp
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// TMN: Added, to be able to separate this into different functions
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jmp KeReturnFromSystemCallWithHook
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}
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}
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__declspec(naked)
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void KeReturnFromSystemCallWithHook()
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{
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__asm
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{
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/* Call the post system call hook and deliver any pending APCs */
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push esp
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push eax
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call KiAfterSystemCallHook
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add esp, 8
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// TMN: Added, to be able to separate this into different functions
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jmp KeReturnFromSystemCall
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}
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}
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__declspec(naked)
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void KeReturnFromSystemCall()
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{
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__asm
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{
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/* Restore the user context */
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/* Get a pointer to the current thread */
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mov esi, fs:0x124
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/* Restore the old trap frame pointer */
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mov ebx, 0x3c[esp]
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mov KTHREAD_TRAP_FRAME[esi], ebx
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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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add esp, 4 /* Don't restore 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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} |