From: Pavel Machek <pavel@ucw.cz>
To: Andrew Morton <akpm@zip.com.au>,
kernel list <linux-kernel@vger.kernel.org>
Cc: ak@suse.de
Subject: [patch] s-t-RAM: load gdt the right way
Date: Thu, 21 Apr 2005 13:09:36 +0200 [thread overview]
Message-ID: <20050421110936.GA18164@elf.ucw.cz> (raw)
Sleep code uses wrong version of lgdt, that does the wrong thing when
gdt is beyond 16MB or so...
Signed-off-by: Pavel Machek <pavel@suse.cz>
--- clean/arch/i386/kernel/acpi/wakeup.S 2005-01-22 21:24:51.000000000 +0100
+++ linux/arch/i386/kernel/acpi/wakeup.S 2005-04-14 22:29:45.000000000 +0200
@@ -74,8 +90,9 @@
movw %ax,%fs
movw $0x0e00 + 'i', %fs:(0x12)
- # need a gdt
- lgdt real_save_gdt - wakeup_code
+ # need a gdt -- use lgdtl to force 32-bit operands, in case
+ # the GDT is located past 16 megabytes
+ lgdtl real_save_gdt - wakeup_code
movl real_save_cr0 - wakeup_code, %eax
movl %eax, %cr0
--- clean/arch/x86_64/kernel/acpi/wakeup.S 2005-01-22 21:24:51.000000000 +0100
+++ linux/arch/x86_64/kernel/acpi/wakeup.S 2005-04-14 22:34:18.000000000 +0200
@@ -67,7 +67,7 @@
shll $4, %eax
addl $(gdta - wakeup_code), %eax
movl %eax, gdt_48a +2 - wakeup_code
- lgdt %ds:gdt_48a - wakeup_code # load gdt with whatever is
+ lgdtl %ds:gdt_48a - wakeup_code # load gdt with whatever is
# appropriate
movl $1, %eax # protected mode (PE) bit
--
Boycott Kodak -- for their patent abuse against Java.
reply other threads:[~2005-04-21 11:19 UTC|newest]
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