user program (still many #PF)

src/arch/x86/idt.c

@@ -77,7 +77,7 @@ void idt_init()
         idt_set_entry(i, vector_0_handler + (i*16), 0);
     }
 
-    idt_set_entry(0x80, vector_128_handler, 0);
+    idt_set_entry(0x80, vector_128_handler, 3);
 
     idt_load(&idt);
     DEBUG("IDT initialized");
@@ -264,9 +264,10 @@ struct cpu_status* interrupt_dispatch(struct cpu_status* context)
             // Send an EOI so that we can continue having interrupts
             outb(0x20, 0x20);
 
-            if (ticks % SCHEDULER_QUANTUM == 0) {
+            // Scheduler is temporarily disabled to test user trampoline
+            /* if (ticks % SCHEDULER_QUANTUM == 0) {
                 return scheduler_schedule(context);
-            }
+            } */
 
             break;
 

src/arch/x86/init.c

@@ -45,7 +45,7 @@ static void x86_enable_fpu()
 	__asm__ volatile("mov %%cr4, %0" : "=r"(cr4));
 	cr4 |= 0x200;
 	__asm__ volatile("mov %0, %%cr4" :: "r"(cr4));
-    uint16_t cw = 0x37F;
+    uint16_t cw = 0x37F; // control word
     asm volatile("fldcw %0" :: "m"(cw));
 }