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[PATCH] i386: Allow i386 crash kernels to handle x86_64 dumps

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The specific case I am encountering is kdump under Xen with a 64 bit
hypervisor and 32 bit kernel/userspace.  The dump created is 64 bit due to
the hypervisor but the dump kernel is 32 bit for maximum compatibility.

It's possibly less likely to be useful in a purely native scenario but I
see no reason to disallow it.

[[email protected]: build fix]
Signed-off-by: Ian Campbell <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Acked-by: Vivek Goyal <[email protected]>
Cc: Horms <[email protected]>
Cc: Magnus Damm <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Andi Kleen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
This commit is contained in:
Ian Campbell 2007-05-02 19:27:09 +02:00 • committed by Andi Kleen
commit 79e030114a
3 changed files with 12 additions and 1 deletions
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2
fs/proc/vmcore.c
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@ -514,7 +514,7 @@ static int __init parse_crash_elf64_headers(void)
/* Do some basic Verification. */
if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0 ||
(ehdr.e_type != ET_CORE) ||
!elf_check_arch(&ehdr) ||
!vmcore_elf_check_arch(&ehdr) ||
ehdr.e_ident[EI_CLASS] != ELFCLASS64 ||
ehdr.e_ident[EI_VERSION] != EV_CURRENT ||
ehdr.e_version != EV_CURRENT ||