Source: crash
Version: 7.1.7-1
Severity: serious
Tags: patch
The utility is probably working in its current shape for older kernel,
but not for newer:
|$ crash ../build-RT/vmlinux mem2
|
|crash 7.1.7
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|
|crash: cannot resolve "init_level4_pgt"
This was a v4.14 kernel. With the patch attached on the other hand, it
works again.
This change is part of 7.2.0. Can please have an update for unstable and
a backport for stable?
Sebastian
>From a16324a2f05c0947a83e26a5de7c756de4603da9 Mon Sep 17 00:00:00 2001
From: Dave Anderson <ander...@redhat.com>
Date: Thu, 6 Jul 2017 16:19:41 -0400
Subject: [PATCH] Fix for Linux 4.13-rc0 commit
7fd8329ba502ef76dd91db561c7aed696b2c7720 "x86/boot/64: Rename init_level4_pgt
and early_level4_pgt". Without the patch, the crash session fails during
initialization with the error message "crash: cannot resolve
"init_level4_pgt". (ander...@redhat.com)
---
x86_64.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/x86_64.c b/x86_64.c
index 1d23d784ad51..44d0c98660c0 100644
--- a/x86_64.c
+++ b/x86_64.c
@@ -1388,12 +1388,17 @@ static void
x86_64_init_kernel_pgd(void)
{
int i;
- ulong init_level4_pgt;
+ ulong kernel_pgt = 0;
- init_level4_pgt = symbol_value("init_level4_pgt");
+ if (kernel_symbol_exists("init_level4_pgt"))
+ kernel_pgt = symbol_value("init_level4_pgt");
+ else if (kernel_symbol_exists("init_top_pgt"))
+ kernel_pgt = symbol_value("init_top_pgt");
+ else
+ error(WARNING, "neither \"init_level4_pgt\" or \"init_top_pgt\" exist\n");
for (i = 0; i < NR_CPUS; i++)
- vt->kernel_pgd[i] = init_level4_pgt;
+ vt->kernel_pgd[i] = kernel_pgt;
FILL_PML4();
}
--
2.15.1
