[ion] 20934: - Implement first version of trap exit macro. Currently missing documentation, and the parameters could probably be simplified.
- Implement first version of trap exit macro. Currently missing documentation, and the parameters could probably be simplified. Modified: trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S Modified: trunk/reactos/ntoskrnl/ke/i386/syscall.S _____
Modified: trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S --- trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S 2006-01-17 05:05:35 UTC (rev 20933) +++ trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S 2006-01-17 05:22:00 UTC (rev 20934) @@ -1,13 +1,27 @@
/* * COPYRIGHT: See COPYING in the top level directory - * PROJECT: ReactOS kernel - * FILE: ntoskrnlinclude/i386/asmmacro.S - * PURPOSE: Assembly Macros for Spinlocks and common Trap Code (TODO) + * PROJECT: ReactOS Kernel + * FILE: ntoskrnl/include/i386/asmmacro.S + * PURPOSE: Assembly Macros for Spinlocks and common Trap Code * PROGRAMMERS: Alex Ionescu (alex@relsoft.net) */
/* INCLUDES ******************************************************************/ + #include <ndk/asm.h> + +// Arguments for TRAP_EPILOG +#define FromSystemCall 1 +#define DoRestorePreviousMode 1 +#define DoRestoreEverything 1 +#define DoRestoreSegments 1 +#define DoRestoreVolatiles 1 +#define NotFromSystemCall 0 +#define DoNotRestorePreviousMode 0 +#define DoNotRestoreEverything 0 +#define DoNotRestoreSegments 0 +#define DoNotRestoreVolatiles 0 + .intel_syntax noprefix
// @@ -219,5 +233,228 @@ /* Set the Trap Frame Debug Header */ \ SET_TF_DEBUG_HEADER
+// +// @name TRAP_EPILOG +// +// This macro creates a standard trap entry prologue. +// It should be used for entry into any kernel trap (KiTrapXx), but not for +// system calls, which require special handling. +// +// @param Label +// Identifying name of the caller function; will be used to append +// to the name V86 and DR helper functions, which must already exist. +// +// @remark +// +.macro TRAP_EPILOG SystemCall, RestorePreviousMode, RestoreSegments, RestoreVolatiles, RestoreAllRegs +#ifdef DBG + /* Assert the flags */ + pushfd + pop edx + test edx, EFLAGS_INTERRUPT_MASK + jnz 1f
+ /* Assert the stack */ + cmp esp, ebp + jnz 1f
+ /* Assert the trap frame */ +0: + //sub dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 + //jnz 2f + + /* Assert FS */ + mov bx, fs + cmp bx, KGDT_R0_PCR + jnz 1f + + /* Assert exception list */ + cmp dword ptr fs:[KPCR_EXCEPTION_LIST], 0 + jnz 4f +2: + add dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 +1: + int 3 + jmp 0b +4: +#endif + + /* Get exception list */ + mov edx, [esp+KTRAP_FRAME_EXCEPTION_LIST] + +#ifdef DBG + /* Assert the saved exception list */ + or edx, edx + jnz 5f + int 3 +5: +#endif + + /* Restore it */ + mov [fs:KPCR_EXCEPTION_LIST], edx + +.if \RestorePreviousMode + /* Get previous mode */ + mov ecx, [esp+KTRAP_FRAME_PREVIOUS_MODE] + +#ifdef DBG + /* Assert the saved previous mode */ + cmp ecx, -1 + jnz 6f + int 3 +6: +#endif + + /* Restore the previous mode */ + mov esi, [fs:KPCR_CURRENT_THREAD] + mov byte ptr [esi+KTHREAD_PREVIOUS_MODE], cl +.endif + + /* Check for V86 */ + test dword ptr [esp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK + jnz V86_Exit + + /* Check if the frame was edited */ + test word ptr [esp+KTRAP_FRAME_CS], FRAME_EDITED + jz 7f + +.ifeq \RestoreAllRegs + /* Check the old mode */ + cmp word ptr [esp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK + bt word ptr [esp+KTRAP_FRAME_CS], 0 + cmc + ja 8f +.endif + +.if \RestoreVolatiles + /* Restore volatiles */ + mov edx, [esp+KTRAP_FRAME_EDX] + mov ecx, [esp+KTRAP_FRAME_ECX] + mov eax, [esp+KTRAP_FRAME_EAX] +.endif + + /* Check if we were called from kernel mode */ + cmp dword ptr [ebp+KTRAP_FRAME_CS], KGDT_R0_CODE + jz 9f + +.if \RestoreSegments + /* Restore segment registers */ + lea esp, [ebp+KTRAP_FRAME_GS] + pop gs + pop es + pop ds +.endif + + /* Restore FS */ +3: + lea esp, [ebp+KTRAP_FRAME_FS] + pop fs + +9: + /* Skip debug information and unsaved registers */ + lea esp, [ebp+KTRAP_FRAME_EDI] + pop edi + pop esi + pop ebx + pop ebp + + /* Check for ABIOS */ + cmp word ptr [esp+8], 0x80 + ja AbiosExit + + /* Pop error code */ + add esp, 4 + +.if \SystemCall + /* Check if previous CS is from user-mode */ + test dword ptr [esp+4], 1 + + /* It is, so use Fast Exit */ + jnz FastExit + + /* Jump back to stub */ + pop edx + pop ecx + popf + jmp edx + +.ret: +.endif + iret + +.if \SystemCall +FastExit: + /* Is SYSEXIT Supported/Wanted? */ + cmp dword ptr ss:[_KiFastSystemCallDisable], 0 + jnz .ret + test dword ptr [esp+8], EFLAGS_TF + jnz .ret + + /* Restore FS to TIB */ + mov ecx, KGDT_R3_TEB + RPL_MASK + mov fs, ecx + + /* We will be cleaning up the stack ourselves */ + pop edx /* New Ring 3 EIP */ + add esp, 4 /* Skip Ring 3 DS */ + and dword ptr [esp], 0xfffffdff /* Remove EFLAGS_INTERRUPT_MASK from EFLAGS */ + popf /* Restore old EFLAGS */ + pop ecx /* Old Ring 3 SS:ESP */ + + /* + * At this point: + * ECX points to the old User Stack. + * EDX points to the instruction to execute in usermode after the sysenter + */ + sti + sysexit +.endif + +8: + /* Restore EAX */ + mov eax, [esp+KTRAP_FRAME_EAX] + + /* Skip registers */ + add esp, 0x30 + + /* Restore segments and volatiles */ + pop gs + pop es + pop ds + pop edx + pop ecx + + /* Jump back to mainline code */ + jmp 3b + +7: + /* Restore real CS value */ + mov ebx, [esp+KTRAP_FRAME_TEMPCS] + mov [esp+KTRAP_FRAME_CS], ebx + + /* + * If ESP was modified, then a special interrupt exit stack + * must be created to "update" ESP's value in a legal manner + */ + mov ebx, [esp+KTRAP_FRAME_TEMPESP] + sub ebx, 0xC + mov [esp+KTRAP_FRAME_ERROR_CODE], ebx + + /* Copy Interrupt Stack */ + mov esi, [esp+KTRAP_FRAME_EFLAGS] + mov [ebx+8], esi + mov esi, [esp+KTRAP_FRAME_CS] + mov [ebx+4], esi + mov esi, [esp+KTRAP_FRAME_EIP] + mov [ebx], esi + + /* Return */ + add esp, KTRAP_FRAME_EDI + pop edi + pop esi + pop ebx + pop ebp + mov esp, [esp] + iret +.endm + _____
Modified: trunk/reactos/ntoskrnl/ke/i386/syscall.S --- trunk/reactos/ntoskrnl/ke/i386/syscall.S 2006-01-17 05:05:35 UTC (rev 20933) +++ trunk/reactos/ntoskrnl/ke/i386/syscall.S 2006-01-17 05:22:00 UTC (rev 20934) @@ -16,59 +16,10 @@
.intel_syntax noprefix
/* - * There are 3 main types of Trap Entries: <= Move this to asmmacro.S - * - * - System Calls - * - TODO - * - * - Exceptions - * - TODO - * - * - Interrupts - * - TODO - */ - -/* - * There are 3 main types of Trap Exits: <= Correct some things and move to asmmacro.S - * - * - KiServiceExit - * - Clear interrupt flag - * - Common User APC Dispatching - * - Common exit code; segments and volatiles are not restored - * You use this for System Call return, when volatiles are irrelevant. - * (NtContinue, NtRaiseException, KiCallUserMode and all System Call returns) - * - * - KiServiceExit2 - * - Clear interrupt flag - * - Common User APC Dispatching - * - Common exit code; the entire frame is restored. - * You use this when volatiles and other registers need to be restored. - * For example, if debugging is active (NtContinue, NtRaiseException). - * - * - Kei386EoiHelper - * - Clear interrupt flag - * - Common User APC Dispatching - * - Common exit code; the entire frame is restored but *NOT* the Previous Mode - * You use this in the same context as KiServiceExit2, but when the Previous Mode - * should be tampered with. Clearly, as its name suggests, this routine is mostly - * useful for End Of Interrupts. - * Note that this routine is EXPORTED. - * Note that this routine must called by a JMP, not a CALL. - */ - -/* - * The common exit code has 3 modes of operation: - * - Whether or not to restore segments - * - Whether or not to restore volatiles - * - Whether or not to restore the previous mode - * All these are exemplified by the 3 trap exits shown above - */ - - /* * FIXMEs: * - Figure out why ES/DS gets messed up in VMWare, when doing KiServiceExit only, * and only when called from user-mode, and returning to user-mode. - * - Use macros and merge with trap.s nicely + * - Implement SYSCALL_PROLOG macro. */
/*** This file is a mess; it is being worked on. Please contact Alex: @@ -101,7 +52,6 @@ .func KiFastCallEntry _KiFastCallEntry:
-// ==================== UNIQUE SYSENTER STUB. DO NOT DUPLICATE ============// /* Set FS to PCR */ mov ecx, KGDT_R0_PCR mov fs, cx @@ -181,7 +131,7 @@ .func KiSystemService _KiSystemService:
-// ==================== UNIQUE SYSCALL TRAP ENTRY DO NOT DUPLICATE ============// +// ==================== COMMON SYSTEM CALL CODE ============// /* Create a trap frame */ push 0 push ebp @@ -205,7 +155,7 @@
/* Save the old previous mode */ push ss:[esi+KTHREAD_PREVIOUS_MODE] - + /* Skip the other registers */ sub esp, 0x48
@@ -415,162 +365,38 @@ mov es, [ebp+KTRAP_FRAME_ES] mov ds, [ebp+KTRAP_FRAME_DS]
-// ========================= COMMON TRAP EXIT CODE ===================// -#ifdef DBG - /* Assert the flags */ - pushfd - pop edx - test edx, EFLAGS_INTERRUPT_MASK - jnz InvalidExitState + /* Exit and cleanup */ + TRAP_EPILOG FromSystemCall, DoRestorePreviousMode, DoNotRestoreSegments, DoNotRestoreVolatiles, DoRestoreEverything +.endfunc
- /* Assert the stack */ - cmp esp, ebp - jnz InvalidExitState +KiBBTUnexpectedRange:
- /* Assert the trap frame */ -StateCheckDone: - sub dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 - jnz InvalidTrapFrame + /* If this isn't a Win32K call, fail */ + cmp ecx, 0x10 + jne InvalidCall
- /* Assert FS */ - mov bx, fs - cmp bx, KGDT_R0_PCR - jnz InvalidFs + /* Set up Win32K Table */ + push edx + push ebx + call _PsConvertToGuiThread@0
- /* Assert exception list */ - cmp dword ptr fs:[KPCR_EXCEPTION_LIST], 0 - jnz ExceptionListOK - -InvalidFs: - push -1 - call _KeBugCheck@4 - -InvalidTrapFrame: - add dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 - -InvalidExitState: - int 3 - jmp StateCheckDone - -ExceptionListOK: -#endif - - /* Get exception list */ - mov edx, [esp+KTRAP_FRAME_EXCEPTION_LIST] - -#ifdef DBG - /* Assert the saved exception list */ - or edx, edx - jnz ListOk - int 3 - -ListOk: -#endif - - /* Restore it */ - mov [fs:KPCR_EXCEPTION_LIST], edx - -// ==================== ONLY IF PREVIOUS MODE NEEDED ==================// - /* Get previous mode */ - mov ecx, [esp+KTRAP_FRAME_PREVIOUS_MODE] - -#ifdef DBG - /* Assert the saved previous mode */ - cmp ecx, -1 - jnz ModeOk - int 3 - -ModeOk: -#endif - - /* Restore the previous mode */ - mov esi, [fs:KPCR_CURRENT_THREAD] - mov byte ptr [esi+KTHREAD_PREVIOUS_MODE], cl -// ==================== END IF PREVIOUS MODE NEEDED ===================// - - /* Check for V86 */ - test dword ptr [esp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK - jnz V86_Exit - - /* Check if the frame was edited */ - test word ptr [esp+KTRAP_FRAME_CS], FRAME_EDITED - jz EditedFrame - -// ==================== ONLY IF FULL RESTORE NEEDED ===================// - /* Check the old mode */ - cmp word ptr [esp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK - bt word ptr [esp+KTRAP_FRAME_CS], 0 - cmc - ja RestoreAll - cmp dword ptr [ebp+KTRAP_FRAME_CS], KGDT_R0_CODE - jz CommonStackClean -// ==================== END IF FULL RESTORE NEEDED ====================// - - /* Restore FS */ -RestoreFs: - lea esp, [ebp+KTRAP_FRAME_FS] - pop fs - -CommonStackClean: - /* Skip debug information and unsaved registers */ - lea esp, [ebp+KTRAP_FRAME_EDI] - pop edi - pop esi - pop ebx - pop ebp - - /* Check for ABIOS */ - cmp word ptr [esp+8], 0x80 - ja AbiosExit - -AbiosReturn: - /* Pop error code */ - add esp, 4 - - /* Check if previous CS is from user-mode */ - test dword ptr [esp+4], 1 - - /* It is, so use Fast Exit */ - jnz FastRet - - /* Jump back to stub */ + /* FIXME: Handle failure */ + pop eax pop edx - pop ecx - popf - jmp edx
-IntRet: + /* Reset trap frame address */ + mov ebp, esp + mov [esi+KTHREAD_TRAP_FRAME], ebp
- iret + /* Try the Call again */ + jmp CheckValidCall
-FastRet: - /* Is SYSEXIT Supported/Wanted? */ - cmp dword ptr ss:[_KiFastSystemCallDisable], 0 - jnz IntRet - test dword ptr [esp+8], EFLAGS_TF - jnz IntRet +InvalidCall:
- /* Restore FS to TIB */ - mov ecx, KGDT_R3_TEB + RPL_MASK - mov fs, ecx + /* Invalid System Call */ + mov eax, STATUS_INVALID_SYSTEM_SERVICE + jmp KeReturnFromSystemCall
- /* We will be cleaning up the stack ourselves */ - pop edx /* New Ring 3 EIP */ - add esp, 4 /* Skip Ring 3 DS */ -/* and dword ptr [esp], ~EFLAGS_INTERRUPT_MASK Line below is equivalent to this, - but older binutils versions don't understand ~ */ - and dword ptr [esp], 0xfffffdff /* Remove IRQ hack from EFLAGS */ - popf /* Restore old EFLAGS */ - pop ecx /* Old Ring 3 SS:ESP */ - - /* - * At this point: - * ECX points to the old User Stack. - * EDX points to the instruction to execute in usermode after the sysenter - */ - sti - sysexit - #ifdef DBG InvalidIrql: /* Save current IRQL */ @@ -604,106 +430,6 @@ ret #endif
-V86_Exit: - /* Move to EDX position */ - add esp, KTRAP_FRAME_EDX - - /* Restore volatiles */ - pop edx - pop ecx - pop eax - - /* Move to non-volatiles */ - lea esp, [ebp+KTRAP_FRAME_EDI] - pop edi - pop esi - pop ebx - pop ebp - - /* Skip error code and return */ - add esp, 4 - iret - -AbiosExit: - /* Not yet supported */ - int 3 - -RestoreAll: - /* Restore EAX */ - mov eax, [esp+KTRAP_FRAME_EAX] - - /* Skip registers */ - add esp, 0x30 - - /* Restore segments and volatiles */ - pop gs - pop es - pop ds - pop edx - pop ecx - - /* Jump back to mainline code */ - jmp RestoreFs - -EditedFrame: - /* Restore real CS value */ - mov ebx, [esp+KTRAP_FRAME_TEMPCS] - mov [esp+KTRAP_FRAME_CS], ebx - - /* - * If ESP was modified, then a special interrupt exit stack - * must be created to "update" ESP's value in a legal manner - */ - mov ebx, [esp+KTRAP_FRAME_TEMPESP] - sub ebx, 0xC - mov [esp+KTRAP_FRAME_ERROR_CODE], ebx - - /* Copy Interrupt Stack */ - mov esi, [esp+KTRAP_FRAME_EFLAGS] - mov [ebx+8], esi - mov esi, [esp+KTRAP_FRAME_CS] - mov [ebx+4], esi - mov esi, [esp+KTRAP_FRAME_EIP] - mov [ebx], esi - - /* Return */ - add esp, KTRAP_FRAME_EDI - pop edi - pop esi - pop ebx - pop ebp - mov esp, [esp] - iret - -KiBBTUnexpectedRange: - - /* If this isn't a Win32K call, fail */ - cmp ecx, 0x10 - jne InvalidCall - - /* Set up Win32K Table */ - push edx - push ebx - call _PsConvertToGuiThread@0 - - /* FIXME: Handle failure */ - pop eax - pop edx - - /* Reset trap frame address */ - mov ebp, esp - mov [esi+KTHREAD_TRAP_FRAME], ebp - - /* Try the Call again */ - jmp CheckValidCall - -InvalidCall: - - /* Invalid System Call */ - mov eax, STATUS_INVALID_SYSTEM_SERVICE - jmp KeReturnFromSystemCall -.endfunc - .func KiServiceExit2 _KiServiceExit2:
@@ -713,155 +439,48 @@ /* Check for, and deliver, User-Mode APCs if needed */ CHECK_FOR_APC_DELIVER 0
-#ifdef DBG - /* Assert the flags */ - pushfd - pop edx - test edx, EFLAGS_INTERRUPT_MASK - jnz InvalidExitState2 + /* Exit and cleanup */ + TRAP_EPILOG NotFromSystemCall, DoRestorePreviousMode, DoRestoreSegments, DoRestoreVolatiles, DoNotRestoreEverything +.endfunc
- /* Assert the stack */ - cmp esp, ebp - jnz InvalidExitState2 +.globl _Kei386EoiHelper@0 +.func Kei386EoiHelper@0 +_Kei386EoiHelper@0:
- /* Assert the trap frame */ -StateCheckDone2: - sub dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 - jnz InvalidTrapFrame2 + /* Disable interrupts */ + cli
- /* Assert FS */ - mov bx, fs - cmp bx, KGDT_R0_PCR - jnz InvalidFs2 + /* Check for, and deliver, User-Mode APCs if needed */ + CHECK_FOR_APC_DELIVER 0
- /* Assert exception list */ - cmp dword ptr fs:[KPCR_EXCEPTION_LIST], 0 - jnz ExceptionListOK2 + /* Exit and cleanup */ + TRAP_EPILOG NotFromSystemCall, DoNotRestorePreviousMode, DoRestoreSegments, DoRestoreVolatiles, DoNotRestoreEverything +.endfunc
-InvalidFs2: - push -1 - call _KeBugCheck@4 +V86_Exit: + /* Move to EDX position */ + add esp, KTRAP_FRAME_EDX
-InvalidTrapFrame2: - add dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 - -InvalidExitState2: - int 3 - jmp StateCheckDone2 - -ExceptionListOK2: -#endif - - /* Get exception list */ - mov edx, [esp+KTRAP_FRAME_EXCEPTION_LIST] - -#ifdef DBG - /* Assert the saved exception list */ - or edx, edx - jnz ListOk2 - int 3 - -ListOk2: -#endif - - /* Restore it */ - mov [fs:KPCR_EXCEPTION_LIST], edx - -// ==================== ONLY IF PREVIOUS MODE NEEDED ==================// - /* Get previous mode */ - mov ecx, [esp+KTRAP_FRAME_PREVIOUS_MODE] - -#ifdef DBG - /* Assert the saved previous mode */ - cmp ecx, -1 - jnz ModeOk2 - int 3 - -ModeOk2: -#endif - - /* Restore previous mode */ - mov esi, [fs:KPCR_CURRENT_THREAD] - mov byte ptr [esi+KTHREAD_PREVIOUS_MODE], cl - - /* Check for V86 */ - test dword ptr [esp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK - jnz V86_Exit - - /* Check if the frame was edited */ - test word ptr [esp+KTRAP_FRAME_CS], FRAME_EDITED - jz EditedFrame2 - /* Restore volatiles */ - mov edx, [esp+KTRAP_FRAME_EDX] - mov ecx, [esp+KTRAP_FRAME_ECX] - mov eax, [esp+KTRAP_FRAME_EAX] + pop edx + pop ecx + pop eax
- /* Check if it was kernel */ - cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R0_CODE - jz CommonStackClean2 - - /* Skip registers */ - lea esp, [ebp+KTRAP_FRAME_GS] - - /* Restore segments and volatiles */ - pop gs - pop es - pop ds - lea esp, [ebp+KTRAP_FRAME_FS] - pop fs - -CommonStackClean2: - /* Skip debug information and unsaved registers */ + /* Move to non-volatiles */ lea esp, [ebp+KTRAP_FRAME_EDI] pop edi pop esi pop ebx pop ebp
- /* Check for ABIOS */ - cmp word ptr [esp+8], 0x80 - ja AbiosExit - - /* Pop error code and return */ + /* Skip error code and return */ add esp, 4 iret
-EditedFrame2: - /* Restore real CS value */ - mov ebx, [esp+KTRAP_FRAME_TEMPCS] - mov [esp+KTRAP_FRAME_CS], ebx +AbiosExit: + /* Not yet supported */ + int 3
- /* - * If ESP was modified, then a special interrupt exit stack - * must be created to "update" ESP's value in a legal manner - */ - mov ebx, [esp+KTRAP_FRAME_TEMPESP] - sub ebx, 0xC - mov [esp+KTRAP_FRAME_ERROR_CODE], ebx - - /* Copy Interrupt Stack */ - mov esi, [esp+KTRAP_FRAME_EFLAGS] - mov [ebx+8], esi - mov esi, [esp+KTRAP_FRAME_CS] - mov [ebx+4], esi - mov esi, [esp+KTRAP_FRAME_EIP] - mov [ebx], esi - - /* Restore volatiles */ - mov eax, [esp+KTRAP_FRAME_EAX] - mov edx, [esp+KTRAP_FRAME_EDX] - mov ecx, [esp+KTRAP_FRAME_ECX] - - /* Return */ - add esp, KTRAP_FRAME_EDI - pop edi - pop esi - pop ebx - pop ebp - mov esp, [esp] - iret - _KiDebugService:
/* Push error code */ @@ -915,151 +534,7 @@
/* Exit through common routine */ jmp _Kei386EoiHelper@0 -.endfunc
-.globl _Kei386EoiHelper@0 -.func Kei386EoiHelper@0 -_Kei386EoiHelper@0: - - /* Disable interrupts */ - cli - - /* Check for, and deliver, User-Mode APCs if needed */ - CHECK_FOR_APC_DELIVER 0 - -#ifdef DBG - /* Assert the flags */ - pushfd - pop edx - test edx, EFLAGS_INTERRUPT_MASK - jnz InvalidExitState3 - - /* Assert the stack */ - cmp esp, ebp - jnz InvalidExitState3 - - /* Assert the trap frame */ -StateCheckDone3: - //sub dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 - //jnz InvalidTrapFrame3 - - /* Assert FS */ - mov bx, fs - cmp bx, KGDT_R0_PCR - jnz InvalidFs3 - - /* Assert exception list */ - cmp dword ptr fs:[KPCR_EXCEPTION_LIST], 0 - jnz ExceptionListOK3 - -InvalidFs3: - push -1 - call _KeBugCheck@4 - -InvalidTrapFrame3: - add dword ptr [esp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00 - -InvalidExitState3: - int 3 - jmp StateCheckDone3 - -ExceptionListOK3: -#endif - - /* Get exception list */ - mov edx, [esp+KTRAP_FRAME_EXCEPTION_LIST] - -#ifdef DBG - /* Assert the saved exception list */ - or edx, edx - jnz ListOk3 - int 3 - -ListOk3: -#endif - - /* Restore exception list */ - mov [fs:KPCR_EXCEPTION_LIST], edx - - /* Check for V86 */ - test dword ptr [esp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK - jnz V86_Exit - - /* Check if the frame was edited */ - test word ptr [esp+KTRAP_FRAME_CS], FRAME_EDITED - jz EditedFrame3 - - /* Restore volatiles */ - mov edx, [esp+KTRAP_FRAME_EDX] - mov ecx, [esp+KTRAP_FRAME_ECX] - mov eax, [esp+KTRAP_FRAME_EAX] - - /* Check if it was kernel */ - cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R0_CODE - jz CommonStackClean3 - - /* Skip registers */ - lea esp, [ebp+KTRAP_FRAME_GS] - - /* Restore segments and volatiles */ - pop gs - pop es - pop ds - lea esp, [ebp+KTRAP_FRAME_FS] - pop fs - -CommonStackClean3: - /* Skip debug information and unsaved registers */ - lea esp, [ebp+KTRAP_FRAME_EDI] - pop edi - pop esi - pop ebx - pop ebp - - /* Check for ABIOS */ - cmp word ptr [esp+8], 0x80 - ja AbiosExit - - /* Pop error code and return */ - add esp, 4 - iret - -EditedFrame3: - /* Restore real CS value */ - mov ebx, [esp+KTRAP_FRAME_TEMPCS] - mov [esp+KTRAP_FRAME_CS], ebx - - /* - * If ESP was modified, then a special interrupt exit stack - * must be created to "update" ESP's value in a legal manner - */ - mov ebx, [esp+KTRAP_FRAME_TEMPESP] - sub ebx, 0xC - mov [esp+KTRAP_FRAME_ERROR_CODE], ebx - - /* Copy Interrupt Stack */ - mov esi, [esp+KTRAP_FRAME_EFLAGS] - mov [ebx+8], esi - mov esi, [esp+KTRAP_FRAME_CS] - mov [ebx+4], esi - mov esi, [esp+KTRAP_FRAME_EIP] - mov [ebx], esi - - /* Restore volatiles */ - mov eax, [esp+KTRAP_FRAME_EAX] - mov edx, [esp+KTRAP_FRAME_EDX] - mov ecx, [esp+KTRAP_FRAME_ECX] - - /* Return */ - add esp, KTRAP_FRAME_EDI - pop edi - pop esi - pop ebx - pop ebp - mov esp, [esp] - iret -.endfunc - .globl _NtRaiseException@12 _NtRaiseException@12:
-
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