#define KeSetContextReturnRegister(Context, ReturnValue) \
((Context)->Eax = (ReturnValue))
+//
+// Macro to get trap and exception frame from a thread stack
+//
+#define KeGetTrapFrame(Thread) \
+ (PKTRAP_FRAME)((ULONG_PTR)((Thread)->InitialStack) - \
+ sizeof(KTRAP_FRAME) - \
+ sizeof(FX_SAVE_AREA))
+
+#define KeGetExceptionFrame(Thread) \
+ NULL
+
+//
+// Macro to get context switches from the PRCB
+// All architectures but x86 have it in the PRCB's KeContextSwitches
+//
+#define KeGetContextSwitches(Prcb) \
+ CONTAINING_RECORD(Prcb, KIPCR, PrcbData)->ContextSwitches
+
//
// Returns the Interrupt State from a Trap Frame.
// ON = TRUE, OFF = FALSE
#define KeGetTrapFrameInterruptState(TrapFrame) \
BooleanFlagOn((TrapFrame)->EFlags, EFLAGS_INTERRUPT_MASK)
+//
+// Flags for exiting a trap
+//
+#define KTE_SKIP_PM_BIT (((KTRAP_EXIT_SKIP_BITS) { { .SkipPreviousMode = TRUE } }).Bits)
+#define KTE_SKIP_SEG_BIT (((KTRAP_EXIT_SKIP_BITS) { { .SkipSegments = TRUE } }).Bits)
+#define KTE_SKIP_VOL_BIT (((KTRAP_EXIT_SKIP_BITS) { { .SkipVolatiles = TRUE } }).Bits)
+
+typedef union _KTRAP_EXIT_SKIP_BITS
+{
+ struct
+ {
+ UCHAR SkipPreviousMode:1;
+ UCHAR SkipSegments:1;
+ UCHAR SkipVolatiles:1;
+ UCHAR Reserved:5;
+ };
+ UCHAR Bits;
+} KTRAP_EXIT_SKIP_BITS, *PKTRAP_EXIT_SKIP_BITS;
+
+
+//
+// Flags used by the VDM/V8086 emulation engine for determining instruction prefixes
+//
+#define PFX_FLAG_ES 0x00000100
+#define PFX_FLAG_CS 0x00000200
+#define PFX_FLAG_SS 0x00000400
+#define PFX_FLAG_DS 0x00000800
+#define PFX_FLAG_FS 0x00001000
+#define PFX_FLAG_GS 0x00002000
+#define PFX_FLAG_OPER32 0x00004000
+#define PFX_FLAG_ADDR32 0x00008000
+#define PFX_FLAG_LOCK 0x00010000
+#define PFX_FLAG_REPNE 0x00020000
+#define PFX_FLAG_REP 0x00040000
+
+//
+// VDM Helper Macros
+//
+// All VDM/V8086 opcode emulators have the same FASTCALL function definition.
+// We need to keep 2 parameters while the original ASM implementation uses 4:
+// TrapFrame, PrefixFlags, Eip, InstructionSize;
+//
+// We pass the trap frame, and prefix flags, in our two parameters.
+//
+// We then realize that since the smallest prefix flag is 0x100, this gives us
+// a count of up to 0xFF. So we OR in the instruction size with the prefix flags
+//
+// We further realize that we always have access to EIP from the trap frame, and
+// that if we want the *current instruction* EIP, we simply have to add the
+// instruction size *MINUS ONE*, and that gives us the EIP we should be looking
+// at now, so we don't need to use the stack to push this parameter.
+//
+// We actually only care about the *current instruction* EIP in one location,
+// so although it may be slightly more expensive to re-calculate the EIP one
+// more time, this way we don't redefine ALL opcode handlers to have 3 parameters,
+// which would be forcing stack usage in all other scenarios.
+//
+#define KiVdmSetVdmEFlags(x) InterlockedOr((PLONG)KiNtVdmState, (x));
+#define KiVdmClearVdmEFlags(x) InterlockedAnd((PLONG)KiNtVdmState, ~(x))
+#define KiCallVdmHandler(x) KiVdmOpcode##x(TrapFrame, Flags)
+#define KiCallVdmPrefixHandler(x) KiVdmOpcodePrefix(TrapFrame, Flags | x)
+#define KiVdmUnhandledOpcode(x) \
+ BOOLEAN \
+ FASTCALL \
+ KiVdmOpcode##x(IN PKTRAP_FRAME TrapFrame, \
+ IN ULONG Flags) \
+ { \
+ /* Not yet handled */ \
+ UNIMPLEMENTED; \
+ while (TRUE); \
+ return TRUE; \
+ }
+
+
+//
+// Registers an interrupt handler with an IDT vector
+//
+FORCEINLINE
+VOID
+KeRegisterInterruptHandler(IN ULONG Vector,
+ IN PVOID Handler)
+{
+ UCHAR Entry;
+ ULONG_PTR Address;
+ PKIPCR Pcr = (PKIPCR)KeGetPcr();
+
+ //
+ // Get the entry from the HAL
+ //
+ Entry = HalVectorToIDTEntry(Vector);
+ Address = PtrToUlong(Handler);
+
+ //
+ // Now set the data
+ //
+ Pcr->IDT[Entry].ExtendedOffset = (USHORT)(Address >> 16);
+ Pcr->IDT[Entry].Offset = (USHORT)Address;
+}
+
+//
+// Returns the registered interrupt handler for a given IDT vector
+//
+FORCEINLINE
+PVOID
+KeQueryInterruptHandler(IN ULONG Vector)
+{
+ PKIPCR Pcr = (PKIPCR)KeGetPcr();
+ UCHAR Entry;
+
+ //
+ // Get the entry from the HAL
+ //
+ Entry = HalVectorToIDTEntry(Vector);
+
+ //
+ // Read the entry from the IDT
+ //
+ return (PVOID)(((Pcr->IDT[Entry].ExtendedOffset << 16) & 0xFFFF0000) |
+ (Pcr->IDT[Entry].Offset & 0xFFFF));
+}
+
//
// Invalidates the TLB entry for a specified address
//
__invlpg(Address);
}
+FORCEINLINE
+VOID
+KeFlushProcessTb(VOID)
+{
+ /* Flush the TLB by resetting CR3 */
+ __writecr3(__readcr3());
+}
+
+FORCEINLINE
+PRKTHREAD
+KeGetCurrentThread(VOID)
+{
+ /* Return the current thread */
+ return ((PKIPCR)KeGetPcr())->PrcbData.CurrentThread;
+}
+
+FORCEINLINE
+VOID
+KiRundownThread(IN PKTHREAD Thread)
+{
+#ifndef CONFIG_SMP
+ /* Check if this is the NPX Thread */
+ if (KeGetCurrentPrcb()->NpxThread == Thread)
+ {
+ /* Clear it */
+ KeGetCurrentPrcb()->NpxThread = NULL;
+ Ke386FnInit();
+ }
+#else
+ /* Nothing to do */
+#endif
+}
+
VOID
FASTCALL
Ki386InitializeTss(
IN ULONG_PTR Context
);
+BOOLEAN
+NTAPI
+VdmDispatchBop(
+ IN PKTRAP_FRAME TrapFrame
+);
+
+BOOLEAN
+FASTCALL
+KiVdmOpcodePrefix(
+ IN PKTRAP_FRAME TrapFrame,
+ IN ULONG Flags
+);
+
+BOOLEAN
+FASTCALL
+Ki386HandleOpcodeV86(
+ IN PKTRAP_FRAME TrapFrame
+);
+
//
// Global x86 only Kernel data
//
extern VOID __cdecl KiTrap8(VOID);
extern VOID __cdecl KiTrap19(VOID);
extern VOID __cdecl KiFastCallEntry(VOID);
+extern VOID NTAPI ExpInterlockedPopEntrySListFault(VOID);
+extern VOID __cdecl CopyParams(VOID);
+extern VOID __cdecl ReadBatch(VOID);
+extern VOID __cdecl FrRestore(VOID);
//
// Sanitizes a selector
projects / reactos.git / blobdiff