adjust kernel stack since syscall doesn't do it for us

src/kernel/syscall/syscall.asm

@@ -1,4 +1,9 @@
+
+; Include useful functions, constants and macros
 %include "../../../include/boot/global/macro.asm"
+%include "../../../include/boot/global/const.asm"
+%include "../../../include/boot/global/mem.asm"
+
 
 ; Export references to C
 global syscall_entry
@@ -9,12 +14,12 @@ extern syscall_handler
 section .text
 
 syscall_entry:
-	;TODO: Test (while I figure out how to disable interrupts via SFMASK)
-	; the idea is to not have to deal with preemptable stuff that can cause
-	; a syscall to be stopped half-way to server an interrupt and then come back.
-	; While this seems pretty cool to figure out, it will for certain take a
-	; little longer as debugging becomes really hard.
-	cli
+	; TODO: read from TSS
+	; Ideally we should point this to the kernel stack in the TSS.rsp0. For some reason I'm having trouble accessing it correctly
+	; Right now we are not dealing with preemtable kernel so pointing it to the original
+	; kernel stack will work.
+	push rsp
+	mov rsp, Kernel.New.Start.VirtualAddress
 
 	; preserve all values so we can access them from C
 	;  and know where to go back to (RCX, r11)
@@ -40,6 +45,8 @@ syscall_entry:
  	pop rbx
  	add rsp, 8       ; ditch rax value it's used for the return value
 
+ 	pop rsp
+
 	; go back to where we came from
 	o64 sysret