From 2f98f5953811a515ccc20f5a69cb96d6ad2c27f1 Mon Sep 17 00:00:00 2001
From: Nathan Giddings <nathang567@gmail.com>
Date: Sat, 18 Jul 2020 18:55:26 -0500
Subject: [PATCH] Added stub syscall handler

---
 src/interrupts/x86/interrupts.cpp  |  4 ++++
 src/interrupts/x86/inthandlers.cpp | 13 ++++++++++---
 src/interrupts/x86/inthandlers.hpp |  3 +++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/interrupts/x86/interrupts.cpp b/src/interrupts/x86/interrupts.cpp
index 971e6a8..9e5c964 100644
--- a/src/interrupts/x86/interrupts.cpp
+++ b/src/interrupts/x86/interrupts.cpp
@@ -1,8 +1,12 @@
 #include "../interrupts.hpp"
 #include "idt.hpp"
+#include "inthandlers.hpp"
 
 kernel::Interrupts::Interrupts()
 {
+    idt[0] = InterruptDescriptor((void*) &divisionByZero, InterruptDescriptor::INT32, 0);
+    idt[8] = InterruptDescriptor((void*) &doubleFaultHandler, InterruptDescriptor::INT32, 0);
+    idt[0x80] = InterruptDescriptor((void*) &syscallHandler, InterruptDescriptor::INT32, 0);
     // Load interrupt handlers
     // Configure PIC
     _lidt();
diff --git a/src/interrupts/x86/inthandlers.cpp b/src/interrupts/x86/inthandlers.cpp
index 59ce3ad..6519620 100644
--- a/src/interrupts/x86/inthandlers.cpp
+++ b/src/interrupts/x86/inthandlers.cpp
@@ -13,20 +13,27 @@ __attribute__ ((interrupt))
 void gpFaultHandler(void* frame, unsigned int error)
 {
     *display = 'a';
-    asm("hlt");
+    display += 2;
 }
 
 __attribute__ ((interrupt))
 void pageFaultHandler(void* frame, unsigned int error)
 {
     *display = '0';
-    //asm("hlt");
+    display += 2;
 }
 
 __attribute__ ((interrupt))
 void doubleFaultHandler(void* frame, unsigned int error)
 {
     *display = '#';
-    //asm("hlt");
+    asm("hlt");
+}
+
+__attribute__ ((interrupt))
+void syscallHandler(void* frame)
+{
+    *display = 'z';
+    display += 2;
 }
 
diff --git a/src/interrupts/x86/inthandlers.hpp b/src/interrupts/x86/inthandlers.hpp
index 10f085b..bf92c56 100644
--- a/src/interrupts/x86/inthandlers.hpp
+++ b/src/interrupts/x86/inthandlers.hpp
@@ -13,4 +13,7 @@ void pageFaultHandler(void* frame, unsigned int error);
 __attribute__ ((interrupt))
 void doubleFaultHandler(void* frame, unsigned int error);
 
+__attribute__ ((interrupt))
+void syscallHandler(void* frame);
+
 #endif