x86_64: Add general protection fault handler

kernel/src/arch/x86_64/CPU.cpp

@@ -28,6 +28,8 @@ extern void setup_idt();
 
 [[noreturn]] void handle_page_fault(Registers* regs)
 {
+    CPU::disable_interrupts();
+
     u64 cr2;
     asm volatile("mov %%cr2, %0" : "=r"(cr2));
     kerrorln("Page fault at RIP %lx while accessing %lx!", regs->rip, cr2);
@@ -37,6 +39,17 @@ extern void setup_idt();
     CPU::efficient_halt();
 }
 
+[[noreturn]] void handle_general_protection_fault(Registers* regs)
+{
+    CPU::disable_interrupts();
+
+    kerrorln("General protection fault at RIP %lx, error code %lx!", regs->rip, regs->error);
+
+    CPU::print_stack_trace_at(regs);
+
+    CPU::efficient_halt();
+}
+
 extern "C" void handle_x86_exception(Registers* regs)
 {
     switch (regs->isr)
@@ -52,7 +65,7 @@ extern "C" void handle_x86_exception(Registers* regs)
     case 10: FIXME_UNHANDLED_INTERRUPT("Invalid TSS");
     case 11: FIXME_UNHANDLED_INTERRUPT("Segment not present");
     case 12: FIXME_UNHANDLED_INTERRUPT("Stack-segment fault");
-    case 13: FIXME_UNHANDLED_INTERRUPT("General protection fault");
+    case 13: handle_general_protection_fault(regs);
     case 14: handle_page_fault(regs);
     case 16: FIXME_UNHANDLED_INTERRUPT("x87 floating-point exception");
     case 17: FIXME_UNHANDLED_INTERRUPT("Alignment check");

luna/include/luna/Alloc.h

@@ -20,6 +20,7 @@ void raw_free(void*);
 
 void* operator new(usize size, const std::nothrow_t&) noexcept;
 void* operator new[](usize size, const std::nothrow_t&) noexcept;
+void operator delete(void* ptr, usize size, std::align_val_t alignment) noexcept;
 
 template <typename T, class... Args> [[nodiscard]] Result<T*> make(Args... args)
 {

luna/src/Alloc.cpp

@@ -22,4 +22,9 @@ void raw_free(void* ptr)
 #else
     return free(ptr);
 #endif
+}
+
+void operator delete(void* ptr, usize size, std::align_val_t) noexcept
+{
+    operator delete(ptr, size);
 }