Kernel: Add some helpful debug prints

Log RIP when stack pointer is out of bounds.

Log all syscalls that return ENOTSUP

kernel/arch/x86_64/IDT.cpp

@@ -189,6 +189,7 @@ namespace Kernel::IDT
 				else
 				{
 					derrorln("Stack pointer out of bounds!");
+					derrorln("rip {H}", interrupt_stack.rip);
 					derrorln("rsp {H}, stack {H}->{H}, istack {H}->{H}",
 						interrupt_stack.rsp,
 						stack.vaddr(), stack.vaddr() + stack.size(),

kernel/kernel/Syscall.cpp

@@ -217,6 +217,9 @@ namespace Kernel
 
 		asm volatile("cli");
 
+		if (ret.is_error() && ret.error().get_error_code() == ENOTSUP)
+			dprintln("ENOTSUP {}", syscall);
+
 		if (ret.is_error() && ret.error().is_kernel_error())
 			Kernel::panic("Kernel error while returning to userspace {}", ret.error());