33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
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From 0ebcd6f3570dd66bff0930872b8bf859bdcf302a Mon Sep 17 00:00:00 2001
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Message-Id: <0ebcd6f3570dd66bff0930872b8bf859bdcf302a.1477548646.git.panand@redhat.com>
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From: Pratyush Anand <panand@redhat.com>
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Date: Thu, 27 Oct 2016 11:34:33 +0530
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Subject: [PATCH] x86_64: fix page_offset calculation
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Kernel text region lies above __START_KERNEL_map, which is linearly mapped
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however not a direct mapping. Direct mapping region lies below it instead.
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So, page_offset can only be calculated with a region which is below
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__START_KERNEL_map.
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Signed-off-by: Pratyush Anand <panand@redhat.com>
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---
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arch/x86_64.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/arch/x86_64.c b/arch/x86_64.c
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index 13990cef839b..3ef33ae4ef2d 100644
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--- a/makedumpfile-1.6.0/arch/x86_64.c
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+++ b/makedumpfile-1.6.0/arch/x86_64.c
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@@ -41,7 +41,7 @@ get_page_offset_x86_64(void)
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unsigned long long virt_start;
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for (i = 0; get_pt_load(i, &phys_start, NULL, &virt_start, NULL); i++) {
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- if (virt_start >= __START_KERNEL_map) {
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+ if (virt_start < __START_KERNEL_map) {
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info->page_offset = virt_start - phys_start;
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return TRUE;
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}
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--
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2.7.4
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