Add kprintf for DEBUG(); differentiated from printf()

src/arch/x86/idt.c

@@ -72,6 +72,9 @@ void idt_init()
         // Each vector handler is 16-byte aligned, so <vector_no>*16 = address of that handler
         idt_set_entry(i, vector_0_handler + (i*16), 0);
     }
+
+    idt_set_entry(0x80, syscall_handler, 0);
+
     idt_load(&idt);
     DEBUG("IDT initialized");
 }

src/arch/x86/syscall.c

@@ -0,0 +1,26 @@
+/*
+ * @author  xamidev <xamidev@riseup.net>
+ * @brief   System call handling
+ * @license GPL-3.0-only
+ */
+
+#include <arch/x86.h>
+#include <kernel.h>
+
+struct cpu_status_t* syscall_handler(struct cpu_status_t* regs)
+{
+    DEBUG("Syscall %lx with argument %lx", regs->rdi, regs->rsi);
+
+    switch (regs->rdi)
+    {
+        case 0:
+            break;
+        case 1:
+            break;
+        default:
+            regs->rsi = 0xdeadbeef;
+            break;
+    }
+
+    return regs;
+}