Remove user Mode Access to VGA / Heap and Kernel Methods.

1 files changed, 11 insertions, 1 deletions

diff --git a/arch/x86_64/src/user/main.cpp b/arch/x86_64/src/user/main.cpp
index 3ddcb32..3e7b0ec 100644
--- a/arch/x86_64/src/user/main.cpp
+++ b/arch/x86_64/src/user/main.cpp
@@ -3,21 +3,31 @@
 #include "arch/context_switching/syscall/main.hpp"
 
 // TODO: Disallow this import
+#include "arch/kernel/cpu/if.hpp"
 #include "arch/video/vga/text.hpp"
 
 namespace teachos::arch::user
 {
-  [[gnu::section(".user_text")]]
   auto main() -> void
   {
     char constexpr syscall_message[] = "Successfully entered user mode and wrote to VGA buffer via syscall!";
     auto const error = context_switching::syscall::syscall(context_switching::syscall::type::WRITE,
                                                            {reinterpret_cast<uint64_t>(&syscall_message)});
 
+    kernel::cpu::clear_interrupt_flag();  // Causes crash Kernel Code (.text) is not mapped in User mMde
+
+    auto test = new int{20};  // Causes crash Heap is not mapped in User Mode
+    (void)test;
+
     if (!error)
     {
+      // Causes crash vga is not mapped in User Mode
       video::vga::text::write("Successfully made a SYSCALL and returned with SYSRETQ!",
                               video::vga::text::common_attributes::green_on_black);
     }
+
+    for (;;)
+    {
+    }
   }
 }  // namespace teachos::arch::user