[Xen-devel] [PATCH] DS init in trampoline code

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Subject:	[Xen-devel] [PATCH] DS init in trampoline code
From:	"Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date:	Tue, 12 Jun 2007 19:05:21 +0800
Delivery-date:	Tue, 12 Jun 2007 04:03:30 -0700
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Thread-topic:	[PATCH] DS init in trampoline code

Initialize ds before accessing data in trampoline area, or
else 0xA5 is written to wrong place.

Signed-off-by Kevin Tian <kevin.tian@xxxxxxxxx>

diff -r de47ca8be7fe xen/arch/x86/boot/trampoline.S
--- a/xen/arch/x86/boot/trampoline.S    Mon Jun 11 15:50:35 2007 +0100
+++ b/xen/arch/x86/boot/trampoline.S    Mon Jun 11 22:49:36 2007 -0400
@@ -6,6 +6,8 @@
 
         .globl trampoline_realmode_entry
 trampoline_realmode_entry:
+        mov     %cs, %ax
+        mov     %ax, %ds
         movb    $0xA5,bootsym(trampoline_cpu_started)
         cld
         cli

Thanks,
Kevin

tramp_ds.patch
Description: tramp_ds.patch

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[Xen-devel] [PATCH] DS init in trampoline code