Merge multiboot2 into mbtag-spec

ChangeLog

@@ -1,3 +1,10 @@
+2010-03-14  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* doc/kernel.c (cmain): Use padding to properly display 64-bit
+	quantities.
+	(printf): Add padding support.
+	Reported by: Soeren D. Schulze.
+
 2010-02-09  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* doc/multiboot.texi: Fix a typo.

doc/kernel.c

@@ -320,9 +320,22 @@ printf (const char *format, ...)
 	putchar (c);
       else
 	{
-	  char *p;
+	  char *p, *p2;
+	  int pad0 = 0, pad = 0;
 	  
 	  c = *format++;
+	  if (c == '0')
+	    {
+	      pad0 = 1;
+	      c = *format++;
+	    }
+
+	  if (c >= '0' && c <= '9')
+	    {
+	      pad = c - '0';
+	      c = *format++;
+	    }
+
 	  switch (c)
 	    {
 	    case 'd':
@@ -339,6 +352,9 @@ printf (const char *format, ...)
 		p = "(null)";
 
 	    string:
+	      for (p2 = p; *p2; p2++);
+	      for (; p2 < p + pad; p2++)
+		putchar (pad0 ? '0' : ' ');
 	      while (*p)
 		putchar (*p++);
 	      break;