12208 dboot_printf(): support %u

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 
 /*
  * Copyright (c) 2012 Gary Mills
+ * Copyright 2020 Joyent, Inc.
  *
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 

@@ -91,11 +92,11 @@
                 ++s;
         }
 }
 
 static void
-dboot_putnum(uint64_t x, uint_t is_signed, uint8_t base)
+dboot_putnum(uint64_t x, boolean_t is_signed, uint8_t base)
 {
         char buffer[64];        /* digits in reverse order */
         int i;
 
         if (is_signed && (int64_t)x < 0) {

@@ -112,20 +113,19 @@
         while (i >= 0)
                 bcons_putchar(buffer[i--]);
 }
 
 /*
- * very primitive printf - only does %s, %d, %x, %lx, or %%
+ * Very primitive printf - only does a subset of the standard format characters.
  */
 static void
 do_dboot_printf(char *fmt, va_list args)
 {
         char *s;
         uint64_t x;
         uint8_t base;
         uint8_t size;
-        uint_t is_signed = 1;
 
         if (fmt == NULL) {
                 dboot_puts("dboot_printf(): 1st arg is NULL\n");
                 return;
         }

@@ -157,11 +157,11 @@
                                 dboot_puts(s);
                         break;
 
                 case 'p':
                         x = va_arg(args, ulong_t);
-                        dboot_putnum(x, !is_signed, 16);
+                        dboot_putnum(x, B_FALSE, 16);
                         break;
 
                 case 'l':
                         if (size == 0)
                                 size = sizeof (long);

@@ -174,13 +174,17 @@
                                 x = va_arg(args, int);
                         else if (size == sizeof (long))
                                 x = va_arg(args, long);
                         else
                                 x = va_arg(args, long long);
-                        dboot_putnum(x, is_signed, 10);
+                        dboot_putnum(x, B_TRUE, 10);
                         break;
 
+                case 'u':
+                        base = 10;
+                        goto unsigned_num;
+
                 case 'b':
                         base = 2;
                         goto unsigned_num;
 
                 case 'o':

@@ -190,15 +194,15 @@
                 case 'x':
                         base = 16;
 unsigned_num:
                         if (size == 0)
                                 x = va_arg(args, uint_t);
-                        else if (size == sizeof (long))
+                        else if (size == sizeof (ulong_t))
                                 x = va_arg(args, ulong_t);
                         else
                                 x = va_arg(args, unsigned long long);
-                        dboot_putnum(x, !is_signed, base);
+                        dboot_putnum(x, B_FALSE, base);
                         break;
 
                 default:
                         dboot_puts("dboot_printf(): unknown % escape\n");
                 }