xv6

commit f446c577058046234a369720c109eba6493fb26e
parent 645f9acbb0c5965e38e9e77d4387ec8bcbb40f70
Author: Brian Swetland <swetland@frotz.net>
Date:   Thu,  2 Jan 2014 17:37:23 -0800

provide extended multiboot header in the 32bit build

This will allow the kernel to be booted by a multiboot compatible
bootloader that does not know how to parse ELF headers.

Diffstat:
M
kernel/entry.S
 | 
7
++++++-

1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/kernel/entry.S b/kernel/entry.S
@@ -25,10 +25,15 @@
 .globl multiboot_header
 multiboot_header:
   #define magic 0x1badb002
-  #define flags 0
+  #define flags 0x10000
   .long magic
   .long flags
   .long (-magic-flags)
+  .long V2P_WO(multiboot_header)
+  .long V2P_WO(multiboot_header)
+  .long V2P_WO(edata)
+  .long V2P_WO(end) 
+  .long _start
 
 # By convention, the _start symbol specifies the ELF entry point.
 # Since we haven't set up virtual memory yet, our entry point is