* [patch] s-t-RAM: load gdt the right way
@ 2005-04-21 11:09 Pavel Machek
0 siblings, 0 replies; only message in thread
From: Pavel Machek @ 2005-04-21 11:09 UTC (permalink / raw)
To: Andrew Morton, kernel list; +Cc: ak
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.
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2005-04-21 11:09 [patch] s-t-RAM: load gdt the right way Pavel Machek
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