mirror of
https://github.com/reactos/reactos.git
synced 2024-08-30 07:08:19 +00:00
320 lines
9.1 KiB
C
320 lines
9.1 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: ntoskrnl/include/trap_x.h
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* PURPOSE: Internal Inlined Functions for the Trap Handling Code
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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#pragma once
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//#define TRAP_DEBUG 1
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//
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// Unreachable code hint for GCC 4.5.x, older GCC versions, and MSVC
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//
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#ifdef __GNUC__
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#if __GNUC__ * 100 + __GNUC_MINOR__ >= 405
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#define UNREACHABLE __builtin_unreachable()
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#else
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#define UNREACHABLE __builtin_trap()
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#endif
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#elif _MSC_VER
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#define UNREACHABLE __assume(0)
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#else
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#define UNREACHABLE
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#endif
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//
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// Helper Code
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//
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BOOLEAN
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FORCEINLINE
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KiUserTrap(IN PKTRAP_FRAME TrapFrame)
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{
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/* Anything else but Ring 0 is Ring 3 */
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return (TrapFrame->SegCs & MODE_MASK);
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}
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//
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// Debug Macros
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//
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VOID
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FORCEINLINE
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KiDumpTrapFrame(IN PKTRAP_FRAME TrapFrame)
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{
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/* Dump the whole thing */
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DbgPrint("DbgEbp: %x\n", TrapFrame->DbgEbp);
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DbgPrint("DbgEip: %x\n", TrapFrame->DbgEip);
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DbgPrint("DbgArgMark: %x\n", TrapFrame->DbgArgMark);
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DbgPrint("DbgArgPointer: %x\n", TrapFrame->DbgArgPointer);
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DbgPrint("TempSegCs: %x\n", TrapFrame->TempSegCs);
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DbgPrint("TempEsp: %x\n", TrapFrame->TempEsp);
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DbgPrint("Dr0: %x\n", TrapFrame->Dr0);
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DbgPrint("Dr1: %x\n", TrapFrame->Dr1);
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DbgPrint("Dr2: %x\n", TrapFrame->Dr2);
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DbgPrint("Dr3: %x\n", TrapFrame->Dr3);
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DbgPrint("Dr6: %x\n", TrapFrame->Dr6);
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DbgPrint("Dr7: %x\n", TrapFrame->Dr7);
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DbgPrint("SegGs: %x\n", TrapFrame->SegGs);
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DbgPrint("SegEs: %x\n", TrapFrame->SegEs);
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DbgPrint("SegDs: %x\n", TrapFrame->SegDs);
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DbgPrint("Edx: %x\n", TrapFrame->Edx);
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DbgPrint("Ecx: %x\n", TrapFrame->Ecx);
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DbgPrint("Eax: %x\n", TrapFrame->Eax);
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DbgPrint("PreviousPreviousMode: %x\n", TrapFrame->PreviousPreviousMode);
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DbgPrint("ExceptionList: %x\n", TrapFrame->ExceptionList);
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DbgPrint("SegFs: %x\n", TrapFrame->SegFs);
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DbgPrint("Edi: %x\n", TrapFrame->Edi);
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DbgPrint("Esi: %x\n", TrapFrame->Esi);
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DbgPrint("Ebx: %x\n", TrapFrame->Ebx);
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DbgPrint("Ebp: %x\n", TrapFrame->Ebp);
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DbgPrint("ErrCode: %x\n", TrapFrame->ErrCode);
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DbgPrint("Eip: %x\n", TrapFrame->Eip);
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DbgPrint("SegCs: %x\n", TrapFrame->SegCs);
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DbgPrint("EFlags: %x\n", TrapFrame->EFlags);
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DbgPrint("HardwareEsp: %x\n", TrapFrame->HardwareEsp);
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DbgPrint("HardwareSegSs: %x\n", TrapFrame->HardwareSegSs);
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DbgPrint("V86Es: %x\n", TrapFrame->V86Es);
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DbgPrint("V86Ds: %x\n", TrapFrame->V86Ds);
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DbgPrint("V86Fs: %x\n", TrapFrame->V86Fs);
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DbgPrint("V86Gs: %x\n", TrapFrame->V86Gs);
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}
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#ifdef TRAP_DEBUG
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VOID
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FORCEINLINE
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KiFillTrapFrameDebug(IN PKTRAP_FRAME TrapFrame)
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{
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/* Set the debug information */
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TrapFrame->DbgArgPointer = TrapFrame->Edx;
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TrapFrame->DbgArgMark = 0xBADB0D00;
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TrapFrame->DbgEip = TrapFrame->Eip;
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TrapFrame->DbgEbp = TrapFrame->Ebp;
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TrapFrame->PreviousPreviousMode = -1;
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}
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VOID
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FORCEINLINE
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KiExitTrapDebugChecks(IN PKTRAP_FRAME TrapFrame,
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IN KTRAP_EXIT_SKIP_BITS SkipBits)
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{
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/* Make sure interrupts are disabled */
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if (__readeflags() & EFLAGS_INTERRUPT_MASK)
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{
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DbgPrint("Exiting with interrupts enabled: %lx\n", __readeflags());
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__debugbreak();
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}
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/* Make sure this is a real trap frame */
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if (TrapFrame->DbgArgMark != 0xBADB0D00)
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{
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DbgPrint("Exiting with an invalid trap frame? (No MAGIC in trap frame)\n");
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KiDumpTrapFrame(TrapFrame);
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__debugbreak();
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}
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/* Make sure we're not in user-mode or something */
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if (Ke386GetFs() != KGDT_R0_PCR)
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{
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DbgPrint("Exiting with an invalid FS: %lx\n", Ke386GetFs());
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__debugbreak();
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}
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/* Make sure we have a valid SEH chain */
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if (KeGetPcr()->NtTib.ExceptionList == 0)
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{
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DbgPrint("Exiting with NULL exception chain: %p\n", KeGetPcr()->NtTib.ExceptionList);
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__debugbreak();
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}
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/* Make sure we're restoring a valid SEH chain */
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if (TrapFrame->ExceptionList == 0)
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{
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DbgPrint("Entered a trap with a NULL exception chain: %p\n", TrapFrame->ExceptionList);
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__debugbreak();
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}
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/* If we're ignoring previous mode, make sure caller doesn't actually want it */
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if ((SkipBits.SkipPreviousMode) && (TrapFrame->PreviousPreviousMode != -1))
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{
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DbgPrint("Exiting a trap witout restoring previous mode, yet previous mode seems valid: %lx\n", TrapFrame->PreviousPreviousMode);
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__debugbreak();
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}
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}
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VOID
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FORCEINLINE
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KiExitSystemCallDebugChecks(IN ULONG SystemCall,
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IN PKTRAP_FRAME TrapFrame)
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{
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KIRQL OldIrql;
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/* Check if this was a user call */
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if (KiUserTrap(TrapFrame))
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{
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/* Make sure we are not returning with elevated IRQL */
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OldIrql = KeGetCurrentIrql();
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if (OldIrql != PASSIVE_LEVEL)
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{
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/* Forcibly put us in a sane state */
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KeGetPcr()->Irql = PASSIVE_LEVEL;
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_disable();
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/* Fail */
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KeBugCheckEx(IRQL_GT_ZERO_AT_SYSTEM_SERVICE,
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SystemCall,
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OldIrql,
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0,
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0);
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}
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#if 0
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/* Make sure we're not attached and that APCs are not disabled */
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if ((KeGetCurrentThread()->ApcStateIndex != CurrentApcEnvironment) ||
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(KeGetCurrentThread()->CombinedApcDisable != 0))
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{
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/* Fail */
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KeBugCheckEx(APC_INDEX_MISMATCH,
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SystemCall,
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KeGetCurrentThread()->ApcStateIndex,
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KeGetCurrentThread()->CombinedApcDisable,
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0);
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}
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#endif
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}
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}
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#else
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#define KiExitTrapDebugChecks(x, y)
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#define KiFillTrapFrameDebug(x)
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#define KiExitSystemCallDebugChecks(x, y)
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#endif
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//
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// Generic Exit Routine
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//
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DECLSPEC_NORETURN VOID FASTCALL KiSystemCallReturn(IN PKTRAP_FRAME TrapFrame);
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DECLSPEC_NORETURN VOID FASTCALL KiSystemCallSysExitReturn(IN PKTRAP_FRAME TrapFrame);
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DECLSPEC_NORETURN VOID FASTCALL KiSystemCallTrapReturn(IN PKTRAP_FRAME TrapFrame);
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DECLSPEC_NORETURN VOID FASTCALL KiEditedTrapReturn(IN PKTRAP_FRAME TrapFrame);
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DECLSPEC_NORETURN VOID FASTCALL KiTrapReturn(IN PKTRAP_FRAME TrapFrame);
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DECLSPEC_NORETURN VOID FASTCALL KiTrapReturnNoSegments(IN PKTRAP_FRAME TrapFrame);
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typedef
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VOID
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(FASTCALL
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*PFAST_SYSTEM_CALL_EXIT)(IN PKTRAP_FRAME TrapFrame);
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extern PFAST_SYSTEM_CALL_EXIT KiFastCallExitHandler;
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//
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// Virtual 8086 Mode Optimized Trap Exit
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//
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VOID
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FORCEINLINE
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DECLSPEC_NORETURN
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KiExitV86Trap(IN PKTRAP_FRAME TrapFrame)
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{
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PKTHREAD Thread;
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KIRQL OldIrql;
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/* Get the thread */
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Thread = KeGetCurrentThread();
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while (TRUE)
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{
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/* Return if this isn't V86 mode anymore */
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if (!(TrapFrame->EFlags & EFLAGS_V86_MASK)) KiEoiHelper(TrapFrame);;
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/* Turn off the alerted state for kernel mode */
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Thread->Alerted[KernelMode] = FALSE;
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/* Are there pending user APCs? */
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if (__builtin_expect(!Thread->ApcState.UserApcPending, 1)) break;
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/* Raise to APC level and enable interrupts */
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OldIrql = KfRaiseIrql(APC_LEVEL);
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_enable();
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/* Deliver APCs */
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KiDeliverApc(UserMode, NULL, TrapFrame);
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/* Restore IRQL and disable interrupts once again */
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KfLowerIrql(OldIrql);
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_disable();
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}
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/* If we got here, we're still in a valid V8086 context, so quit it */
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if (__builtin_expect(TrapFrame->Dr7 & ~DR7_RESERVED_MASK, 0))
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{
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/* Not handled yet */
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DbgPrint("Need Hardware Breakpoint Support!\n");
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while (TRUE);
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}
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/* Return from interrupt */
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KiTrapReturnNoSegments(TrapFrame);
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}
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//
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// Virtual 8086 Mode Optimized Trap Entry
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//
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VOID
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FORCEINLINE
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KiEnterV86Trap(IN PKTRAP_FRAME TrapFrame)
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{
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/* Save exception list */
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TrapFrame->ExceptionList = KeGetPcr()->NtTib.ExceptionList;
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/* Save DR7 and check for debugging */
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TrapFrame->Dr7 = __readdr(7);
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if (__builtin_expect(TrapFrame->Dr7 & ~DR7_RESERVED_MASK, 0))
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{
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DbgPrint("Need Hardware Breakpoint Support!\n");
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while (TRUE);
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}
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}
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//
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// Interrupt Trap Entry
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//
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VOID
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FORCEINLINE
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KiEnterInterruptTrap(IN PKTRAP_FRAME TrapFrame)
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{
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/* Save exception list and terminate it */
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TrapFrame->ExceptionList = KeGetPcr()->NtTib.ExceptionList;
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KeGetPcr()->NtTib.ExceptionList = EXCEPTION_CHAIN_END;
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/* Flush DR7 and check for debugging */
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TrapFrame->Dr7 = 0;
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if (__builtin_expect(KeGetCurrentThread()->DispatcherHeader.DebugActive & 0xFF, 0))
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{
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DbgPrint("Need Hardware Breakpoint Support!\n");
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while (TRUE);
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}
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/* Set debug header */
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KiFillTrapFrameDebug(TrapFrame);
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}
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//
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// Generic Trap Entry
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//
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VOID
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FORCEINLINE
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KiEnterTrap(IN PKTRAP_FRAME TrapFrame)
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{
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/* Save exception list */
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TrapFrame->ExceptionList = KeGetPcr()->NtTib.ExceptionList;
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/* Flush DR7 and check for debugging */
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TrapFrame->Dr7 = 0;
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if (__builtin_expect(KeGetCurrentThread()->DispatcherHeader.DebugActive & 0xFF, 0))
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{
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DbgPrint("Need Hardware Breakpoint Support!\n");
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while (TRUE);
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}
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/* Set debug header */
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KiFillTrapFrameDebug(TrapFrame);
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}
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