Add logging to system call

Author: automas-dev

src/kernel/src/system_call.c

@@ -11,18 +11,29 @@
 #include "libk/defs.h"
 #include "process.h"
 
+#undef SERVICE
+#define SERVICE "SYSCALL"
+
 #define MAX_CALLBACKS 0x100
 static sys_call_handler_t __callbacks[MAX_CALLBACKS];
 
 static void callback(registers_t * regs);
 
 void system_call_init(uint8_t isr_interrupt_no) {
-    kmemset(__callbacks, 0, sizeof(__callbacks));
+    if (!kmemset(__callbacks, 0, sizeof(__callbacks))) {
+        KLOG_ERROR("Failed to clear memory of callback handlers array");
+        KPANIC("Failed to clear callback handlers array");
+    }
+    KLOG_DEBUG("Registering interrupt handler on IRQ %u", isr_interrupt_no);
     register_interrupt_handler(isr_interrupt_no, callback);
+
+    KLOG_DEBUG("Initialized system calls");
 }
 
 void system_call_register(uint8_t family, sys_call_handler_t handler) {
-    if (family > MAX_CALLBACKS) {
+    KLOG_DEBUG("Registering handler for family 0x%02X", family);
+    if (family >= MAX_CALLBACKS) {
+        KLOG_ERROR("Cannot register handler for family 0x%02X, must be < 0x%X", family, MAX_CALLBACKS);
         PANIC("Out of range interrupt family");
     }
     __callbacks[family] = handler;
@@ -36,7 +47,7 @@ static void callback(registers_t * regs) {
 
     // if (family != 0x01 && family != 0x10) {
     //     process_t * proc = get_current_process();
-    //     KLOGS_DEBUG("SYS_CALL", "Got system call 0x%04x from PID %u", (int)int_no, proc->pid);
+    //     KLOG_DEBUG("Got system call 0x%04x from PID %u", (int)int_no, proc->pid);
     // }
 
     void * args_data = UINT2PTR(regs->ebx);
@@ -47,9 +58,7 @@ static void callback(registers_t * regs) {
         res = handler(int_no, args_data, regs);
     }
     else {
-        vga_puts("Unknown interrupt: 0x");
-        vga_putx(int_no);
-        // print_trace(&regs);
+        KLOG_ERROR("Failed to find handler for interrupt 0x%04X", int_no);
         PANIC("UNKNOWN INTERRUPT");
     }