From e73ebf225242ad59c51b3dcf1500807217c370cb Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Sun, 2 Nov 2025 21:38:44 -0300
Subject: [PATCH] syscalls/invalid: raise SIGSYS and print message on an
 invalid system call

---
 kernel-src/sys/syscalls/invalid.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel-src/sys/syscalls/invalid.c b/kernel-src/sys/syscalls/invalid.c
index 1ab56656..536710e9 100644
--- a/kernel-src/sys/syscalls/invalid.c
+++ b/kernel-src/sys/syscalls/invalid.c
@@ -1,4 +1,5 @@
 #include <kernel/syscalls.h>
+#include <arch/cpu.h>
 #include <errno.h>
 
 syscallret_t syscall_invalid() {
@@ -6,5 +7,10 @@ syscallret_t syscall_invalid() {
 		.errno = ENOSYS,
 		.ret = -1
 	};
+
+
+	printf("Detected invalid system call, raising SIGSYS and returning ENOSYS\n");
+	signal_signalthread(current_thread(), SIGSYS, true);
+
 	return ret;
 }