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From: "Yinghai Lu" <yinghai.lu@amd.com>
To: "Andrew Morton" <akpm@osdl.org>, "Andi Kleen" <ak@muc.de>,
	"Eric W. Biederman" <ebiederm@xmission.com>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] x86-64: calling clear_bss before set_intr_gate with early_idt_handler
Date: Fri, 24 Nov 2006 17:30:18 -0800	[thread overview]
Message-ID: <86802c440611241730l55e81294u21944b528d95c15d@mail.gmail.com> (raw)

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Please check the patch.

[-- Attachment #2: head64.patch --]
[-- Type: text/x-patch, Size: 717 bytes --]

[PATCH] x86_64: clear_bss before set_intr_gate with early_idt_handler
idt_table is in the .bss section, so clear_bss need to called at first

Signed-off-by: Yinghai Lu <yinghai.lu@amd.com> 

diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index 9561eb3..cc230b9 100644
--- a/arch/x86_64/kernel/head64.c
+++ b/arch/x86_64/kernel/head64.c
@@ -57,10 +57,12 @@ void __init x86_64_start_kernel(char * r
 {
 	int i;
 
-	for (i = 0; i < 256; i++)
+	/* clear bss before set_intr_gate with early_idt_handler */
+	clear_bss();
+
+	for (i = 0; i < IDT_ENTRIES; i++)
 		set_intr_gate(i, early_idt_handler);
 	asm volatile("lidt %0" :: "m" (idt_descr));
-	clear_bss();
 
 	early_printk("Kernel alive\n");
 

             reply	other threads:[~2006-11-25  1:30 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-25  1:30 Yinghai Lu [this message]
2006-11-25  6:55 ` Eric W. Biederman

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