mirror of
https://github.com/reactos/reactos.git
synced 2024-11-06 14:44:19 +00:00
325 lines
No EOL
7.2 KiB
C
325 lines
No EOL
7.2 KiB
C
/*
|
|
* ReactOS kernel
|
|
* Copyright (C) 2000 David Welch <welch@cwcom.net>
|
|
*
|
|
* Converted to MSVC-compatible inline assembler by Mike Nordell, 2003.
|
|
*
|
|
* 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: MSVC6/ntoskrnl/ke_i386_syscall.c
|
|
* based on ntoskrnl/ke/i386/syscall.s
|
|
* PURPOSE: syscall dispatching and 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 KernelMode (0)
|
|
#define UserMode (1)
|
|
|
|
|
|
// TMN: Replicated here to reduce mess-time
|
|
#ifdef STATUS_INVALID_SYSTEM_SERVICE
|
|
#undef STATUS_INVALID_SYSTEM_SERVICE
|
|
#endif
|
|
#define STATUS_INVALID_SYSTEM_SERVICE 0xc000001c
|
|
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
void KiServiceCheck (ULONG Nr);
|
|
ULONG KiAfterSystemCallHook(ULONG NtStatus, PKTRAP_FRAME TrapFrame);
|
|
VOID KiSystemCallHook(ULONG Nr, ...);
|
|
|
|
void KeReturnFromSystemCallWithHook();
|
|
void KeReturnFromSystemCall();
|
|
|
|
|
|
__declspec(naked)
|
|
void interrupt_handler2e(void)
|
|
{
|
|
__asm
|
|
{
|
|
/* Construct a trap frame on the stack */
|
|
|
|
/* Error code */
|
|
push 0
|
|
push ebp
|
|
push ebx
|
|
push esi
|
|
push edi
|
|
push fs
|
|
/* Load PCR selector into fs */
|
|
mov ebx, PCR_SELECTOR
|
|
mov fs, bx
|
|
|
|
/* Save the old exception list */
|
|
mov ebx, fs:KPCR_EXCEPTION_LIST
|
|
push ebx
|
|
/* Set the exception handler chain terminator */
|
|
mov dword ptr fs:KPCR_EXCEPTION_LIST, 0xffffffff
|
|
/* Get a pointer to the current thread */
|
|
mov esi, fs:KPCR_CURRENT_THREAD
|
|
/* Save the old previous mode */
|
|
xor ebx,ebx
|
|
mov bl, ss:KTHREAD_PREVIOUS_MODE[esi]
|
|
push ebx
|
|
/* Set the new previous mode based on the saved CS selector */
|
|
mov ebx, 0x24[esp]
|
|
and ebx, 0x0000FFFF
|
|
cmp ebx, KERNEL_CS
|
|
#if 0
|
|
// TODO: Verify implementation change and use this code path
|
|
// to remove two conditional jumps.
|
|
setnz bl
|
|
mov ss:KTHREAD_PREVIOUS_MODE[esi], bl
|
|
#else
|
|
jne L1
|
|
mov ss:KTHREAD_PREVIOUS_MODE[esi], KernelMode
|
|
jmp L3
|
|
L1:
|
|
mov ss:KTHREAD_PREVIOUS_MODE[esi], UserMode
|
|
L3:
|
|
|
|
#endif
|
|
/* Save other registers */
|
|
push eax
|
|
push ecx
|
|
push edx
|
|
push ds
|
|
push es
|
|
push gs
|
|
push 0 /* DR7 */
|
|
push 0 /* DR6 */
|
|
push 0 /* DR3 */
|
|
push 0 /* DR2 */
|
|
push 0 /* DR1 */
|
|
push 0 /* DR0 */
|
|
push 0 /* XXX: TempESP */
|
|
push 0 /* XXX: TempCS */
|
|
push 0 /* XXX: DebugPointer */
|
|
push 0 /* XXX: DebugArgMark */
|
|
mov ebx, 0x60[esp]
|
|
push ebx /* DebugEIP */
|
|
push ebp /* DebugEBP */
|
|
|
|
/* Load the segment registers */
|
|
mov bx, KERNEL_DS
|
|
mov ds, bx
|
|
mov es, bx
|
|
mov gs, bx
|
|
|
|
/*
|
|
* Save the old trap frame pointer over where we would save the EDX
|
|
* register.
|
|
*/
|
|
mov ebx, KTHREAD_TRAP_FRAME[esi]
|
|
mov 0x3C[esp], ebx
|
|
|
|
/* Save a pointer to the trap frame in the TCB */
|
|
mov KTHREAD_TRAP_FRAME[esi], esp
|
|
|
|
/* Set ES to kernel segment */
|
|
mov bx, KERNEL_DS
|
|
mov es, bx
|
|
|
|
/* Allocate new Kernel stack frame */
|
|
mov ebp, esp
|
|
|
|
/* Users's current stack frame pointer is source */
|
|
mov esi, edx
|
|
|
|
/* Determine system service table to use */
|
|
cmp eax, 0x0fff
|
|
ja new_useShadowTable
|
|
|
|
/* Check to see if EAX is valid/inrange */
|
|
cmp eax, es:KeServiceDescriptorTable + 8
|
|
jbe new_serviceInRange
|
|
mov eax, STATUS_INVALID_SYSTEM_SERVICE
|
|
jmp KeReturnFromSystemCall
|
|
|
|
new_serviceInRange:
|
|
|
|
/* Allocate room for argument list from kernel stack */
|
|
mov ecx, es:KeServiceDescriptorTable + 12
|
|
mov ecx, es:[ecx + eax * 4]
|
|
sub esp, ecx
|
|
|
|
/* Copy the arguments from the user stack to the kernel stack */
|
|
mov edi, esp
|
|
cld
|
|
repe movsb
|
|
|
|
/* DS is now also kernel segment */
|
|
mov ds, bx
|
|
|
|
/* Call system call hook */
|
|
push eax
|
|
call KiSystemCallHook
|
|
pop eax
|
|
|
|
/* Make the system service call */
|
|
mov ecx, es:KeServiceDescriptorTable
|
|
mov eax, es:[ecx + eax * 4]
|
|
call eax
|
|
|
|
#if CHECKED
|
|
/* Bump Service Counter */
|
|
#endif
|
|
|
|
/* Deallocate the kernel stack frame */
|
|
mov esp, ebp
|
|
|
|
/* Call the post system call hook and deliver any pending APCs */
|
|
push ebp
|
|
push eax
|
|
call KiAfterSystemCallHook
|
|
add esp, 8
|
|
|
|
jmp KeReturnFromSystemCall
|
|
|
|
new_useShadowTable:
|
|
|
|
sub eax, 0x1000
|
|
|
|
/* Check to see if EAX is valid/inrange */
|
|
cmp eax, es:KeServiceDescriptorTableShadow + 24
|
|
jbe new_shadowServiceInRange
|
|
mov eax, STATUS_INVALID_SYSTEM_SERVICE
|
|
jmp KeReturnFromSystemCall
|
|
|
|
new_shadowServiceInRange:
|
|
|
|
/* Allocate room for argument list from kernel stack */
|
|
mov ecx, es:KeServiceDescriptorTableShadow + 28
|
|
mov ecx, es:[ecx + eax * 4]
|
|
sub esp, ecx
|
|
|
|
/* Copy the arguments from the user stack to the kernel stack */
|
|
mov edi, esp
|
|
cld
|
|
repe movsb
|
|
|
|
/* DS is now also kernel segment */
|
|
mov ds, bx
|
|
|
|
/* Call system call hook */
|
|
// pushl %eax
|
|
// call _KiSystemCallHook
|
|
// popl %eax
|
|
|
|
/* Call service check routine */
|
|
push eax
|
|
call KiServiceCheck
|
|
pop eax
|
|
|
|
/* Make the system service call */
|
|
mov ecx, es:KeServiceDescriptorTableShadow + 16
|
|
mov eax, es:[ecx + eax * 4]
|
|
call eax
|
|
|
|
#if CHECKED
|
|
/* Bump Service Counter */
|
|
#endif
|
|
|
|
/* Deallocate the kernel stack frame */
|
|
mov esp, ebp
|
|
|
|
// TMN: Added, to be able to separate this into different functions
|
|
jmp KeReturnFromSystemCallWithHook
|
|
}
|
|
}
|
|
|
|
__declspec(naked)
|
|
void KeReturnFromSystemCallWithHook()
|
|
{
|
|
__asm
|
|
{
|
|
/* Call the post system call hook and deliver any pending APCs */
|
|
push esp
|
|
push eax
|
|
call KiAfterSystemCallHook
|
|
add esp, 8
|
|
|
|
// TMN: Added, to be able to separate this into different functions
|
|
jmp KeReturnFromSystemCall
|
|
}
|
|
}
|
|
|
|
__declspec(naked)
|
|
void KeReturnFromSystemCall()
|
|
{
|
|
__asm
|
|
{
|
|
/* Restore the user context */
|
|
/* Get a pointer to the current thread */
|
|
mov esi, fs:0x124
|
|
|
|
/* Restore the old trap frame pointer */
|
|
mov ebx, 0x3c[esp]
|
|
mov KTHREAD_TRAP_FRAME[esi], ebx
|
|
|
|
/* Skip debug information and unsaved registers */
|
|
add esp, 0x30
|
|
pop gs
|
|
pop es
|
|
pop ds
|
|
pop edx
|
|
pop ecx
|
|
add esp, 4 /* Don't restore eax */
|
|
|
|
/* Restore the old previous mode */
|
|
pop ebx
|
|
mov ss:KTHREAD_PREVIOUS_MODE[esi], bl
|
|
|
|
/* Restore the old exception handler list */
|
|
pop ebx
|
|
mov fs:KPCR_EXCEPTION_LIST, ebx
|
|
|
|
pop fs
|
|
pop edi
|
|
pop esi
|
|
pop ebx
|
|
pop ebp
|
|
add esp, 4 /* Ignore error code */
|
|
|
|
iretd
|
|
}
|
|
} |