Implement KeGetCurrentProcessorBlock() and KeGetCurrentProcessorControlBlock() routines for both amd64 and i686

xtoskrnl/ke/amd64/proc.c

@@ -0,0 +1,39 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ke/amd64/proc.c
+ * DESCRIPTION:     AMD64 processor-related functionality for the kernel
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Gets the processor block for the currently executing processor.
+ *
+ * @return This routine returns the current processor block read from the GS register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PKPROCESSOR_BLOCK
+KeGetCurrentProcessorBlock(VOID)
+{
+    /* Get processor block from GS register */
+    return (PKPROCESSOR_BLOCK)ArReadGSQuadWord(FIELD_OFFSET(KPROCESSOR_BLOCK, Self));
+}
+
+/**
+ * Gets the processor control block for the currently executing processor.
+ *
+ * @return This routine returns the current processor control block read from the GS register.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PKPROCESSOR_CONTROL_BLOCK
+KeGetCurrentProcessorControlBlock(VOID)
+{
+    return (PKPROCESSOR_CONTROL_BLOCK)ArReadGSQuadWord(FIELD_OFFSET(KPROCESSOR_BLOCK, Prcb));
+}