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authorIan Campbell <ian.campbell@xensource.com>2007-05-02 21:27:09 +0400
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 21:27:09 +0400
commit79e030114a8d97a1dcd593ab84fb986f8c91c536 (patch)
treeae96f84611dd963c11ce2962a67197030ddd0f3e /include/linux/crash_dump.h
parenteab0c72aecd7982b2c848f7d493ba379efcef15e (diff)
downloadlinux-79e030114a8d97a1dcd593ab84fb986f8c91c536.tar.xz
[PATCH] i386: Allow i386 crash kernels to handle x86_64 dumps
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. [akpm@linux-foundation.org: build fix] Signed-off-by: Ian Campbell <ian.campbell@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Horms <horms@verge.net.au> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/crash_dump.h')
-rw-r--r--include/linux/crash_dump.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
index 32503657f14f..22c7ac5cd80c 100644
--- a/include/linux/crash_dump.h
+++ b/include/linux/crash_dump.h
@@ -14,5 +14,13 @@ extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
extern const struct file_operations proc_vmcore_operations;
extern struct proc_dir_entry *proc_vmcore;
+/* Architecture code defines this if there are other possible ELF
+ * machine types, e.g. on bi-arch capable hardware. */
+#ifndef vmcore_elf_check_arch_cross
+#define vmcore_elf_check_arch_cross(x) 0
+#endif
+
+#define vmcore_elf_check_arch(x) (elf_check_arch(x) || vmcore_elf_check_arch_cross(x))
+
#endif /* CONFIG_CRASH_DUMP */
#endif /* LINUX_CRASHDUMP_H */