first commit

kernel/src/sys/log.c

@@ -0,0 +1,32 @@
+#include "rt.h"
+#include "sys/arch/x86_64/io.h"
+#include <stdarg.h>
+#include <sys/printf.h>
+
+void log(char *format, ...) {
+    // TODO: replace this call with a call to printf() when the RTC is implemented.
+    rt_print("1970-01-01 00:00:00 | ");
+
+    char buf[2048];
+    va_list l;
+    va_start(l, format);
+    npf_vsnprintf(buf, 2048, format, l);
+    va_end(l);
+
+    rt_print(buf);
+
+    char *date = "1970-01-01 00:00:00 | ";
+    for (int i;;i++) {
+        if (date[i] == '\0')
+            break;
+        
+        outb(0xE9, date[i]);
+    }
+
+    for (int i;;i++) {
+        if (buf[i] == '\0')
+            break;
+        
+        outb(0xE9, buf[i]);
+    }
+}