From b0ff2392a15e1d222e51247cfc3ce0350c9ceeb3 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Wed, 3 Jan 2024 02:08:01 +0200
Subject: [PATCH] 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 | 1 +
 kernel/kernel/Syscall.cpp  | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/kernel/arch/x86_64/IDT.cpp b/kernel/arch/x86_64/IDT.cpp
index 0139c904..aad574a5 100644
--- a/kernel/arch/x86_64/IDT.cpp
+++ b/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(),
diff --git a/kernel/kernel/Syscall.cpp b/kernel/kernel/Syscall.cpp
index 2b5f2668..3a9454c0 100644
--- a/kernel/kernel/Syscall.cpp
+++ b/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());