[NTOS]

- Fix bugcheck paramters in KiGeneralProtectionFault
- Disable x87 fpu exceptions

svn path=/branches/ros-amd64-bringup/; revision=45185

reactos/ntoskrnl/ke/amd64/kiinit.c

@@ -179,6 +179,11 @@ KiInitializeCpuFeatures(ULONG Cpu)
 
     /* Disable fpu monitoring */
     __writecr0(__readcr0() & ~CR0_MP);
+
+    /* Disable x87 fpu exceptions */
+    __writecr0(__readcr0() & ~CR0_NE);
+    
+    asm volatile ("fninit\n");
 }
 
 VOID

reactos/ntoskrnl/ke/amd64/trap.S

@@ -588,14 +588,13 @@ KiGpfFatal:
     /* Bugcheck */
     mov ecx, UNEXPECTED_KERNEL_MODE_TRAP
     mov rdx, 0x0000D // EXCEPTION_GP_FAULT
-    xor rdx, rdx
     xor r8, r8
-    xor r9, r9 // Reserved
-    mov [rbp + KTRAP_FRAME_P5], rbp // trap frame
+    mov r9, [rbp + KTRAP_FRAME_ErrorCode] // error code
+    sub rsp, 8
+    mov [rsp + KTRAP_FRAME_P5+8], rbp // trap frame
     call _KeBugCheckWithTf
 
 
-
 KiGpfPopSegDs:
     mov [rbp + KTRAP_FRAME_SegDs], dx
     jmp KiGpfPopSeg