From: Alexander van Heukelum <heukelum@mailshack.com>
To: Andi Kleen <ak@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
"H. Peter Anvin" <hpa@zytor.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH] Make bootsector stub 16-bit-only (x86_64)
Date: Sat, 5 May 2007 12:49:34 +0200 [thread overview]
Message-ID: <20070505104934.GA30966@mailshack.com> (raw)
Hi!
The x86 bzImage contains a stub to inform people that it is not possible
any more to run a Linux kernel by catting it to a floppy and then
booting from it. This was meant to be all 16-bit code. The first
instruction, however, ended up as being coded as a 16:32-bit far jump. I
assume the intention was a 16:16-bit far jump.
This patch changes only x86_64.
Greetings,
Alexander
Signed-off-by: Alexander van Heukelum <heukelum@mailshack.com>
---
diff --git a/arch/x86_64/boot/bootsect.S b/arch/x86_64/boot/bootsect.S
index 011b7a4..ae9df0d 100644
--- a/arch/x86_64/boot/bootsect.S
+++ b/arch/x86_64/boot/bootsect.S
@@ -44,7 +44,7 @@ #endif
_start:
# Normalize the start address
- jmpl $BOOTSEG, $start2
+ jmpw $BOOTSEG, $start2
start2:
movw %cs, %ax
reply other threads:[~2007-05-05 17:00 UTC|newest]
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