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x86, kaslr: export offset in VMCOREINFO ELF notes

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Include kASLR offset in VMCOREINFO ELF notes to assist in debugging.

[ hpa: pushing this for v3.14 to avoid having a kernel version with
  kASLR where we can't debug output. ]

Signed-off-by: Eugene Surovegin <surovegin@google.com>
Link: http://lkml.kernel.org/r/20140123173120.GA25474@www.outflux.net
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Eugene Surovegin 2014-01-23 09:31:20 -08:00 committed by H. Peter Anvin
parent cfbf8d4857
commit b6085a8657
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/machine_kexec_64.c
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@ -279,5 +279,7 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_SYMBOL(node_data);
VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
#endif
vmcoreinfo_append_str("KERNELOFFSET=%lx\n",
(unsigned long)&_text - __START_KERNEL);
}