Replace hardcoded stack count with architecture specific constant

sdk/xtdk/amd64/ketypes.h

@@ -111,6 +111,7 @@
 
 /* XTOS Kernel stack size */
 #define KERNEL_STACK_SIZE                 0x8000
+#define KERNEL_STACKS                     3
 
 /* XTOS Kernel stack guard pages */
 #define KERNEL_STACK_GUARD_PAGES          1

sdk/xtdk/i686/ketypes.h

@@ -130,6 +130,7 @@
 
 /* XTOS Kernel stack size */
 #define KERNEL_STACK_SIZE                 0x4000
+#define KERNEL_STACKS                     2
 
 /* XTOS Kernel stack guard pages */
 #define KERNEL_STACK_GUARD_PAGES          1

xtoskrnl/mm/kpool.cc

@@ -128,7 +128,9 @@ MM::KernelPool::AllocateProcessorStructures(IN ULONG CpuNumber,
 
     /* Align address to page size boundary and find a space for processor block */
     Address = ROUND_UP((UINT_PTR)ProcessorStructures, MM_PAGE_SIZE);
-    ProcessorBlock = (PKPROCESSOR_BLOCK)((PUCHAR)Address + (2 * KERNEL_STACK_SIZE) + (GDT_ENTRIES * sizeof(KGDTENTRY)));
+    ProcessorBlock = (PKPROCESSOR_BLOCK)((PUCHAR)Address +
+                     (KERNEL_STACKS * KERNEL_STACK_SIZE) +
+                     (GDT_ENTRIES * sizeof(KGDTENTRY)));
 
     /* Store processor number in the processor block */
     ProcessorBlock->CpuNumber = CpuNumber;