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author | Jeff Dike | 2006-12-08 11:36:23 +0100 |
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committer | Linus Torvalds | 2006-12-08 17:28:39 +0100 |
commit | e182c965b6ce0dffed0967a1be2173825a2ede2f (patch) | |
tree | 287d3801dc660b4bc39da08400a68b6ea536e30e /arch/um/sys-x86_64/bug.c | |
parent | [PATCH] Generic BUG for x86-64 (diff) | |
download | kernel-qcow2-linux-e182c965b6ce0dffed0967a1be2173825a2ede2f.tar.gz kernel-qcow2-linux-e182c965b6ce0dffed0967a1be2173825a2ede2f.tar.xz kernel-qcow2-linux-e182c965b6ce0dffed0967a1be2173825a2ede2f.zip |
[PATCH] UML: add generic BUG support
The BUG changes in -mm3 need some arch support. This patch adds the UML
support needed. For the most part, it was stolen from the underlying
architecture. The exception is the kernel eip < PAGE_OFFSET test, which is
wrong for skas mode UMLs.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/sys-x86_64/bug.c')
-rw-r--r-- | arch/um/sys-x86_64/bug.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/bug.c b/arch/um/sys-x86_64/bug.c new file mode 100644 index 000000000000..200c8ba2879b --- /dev/null +++ b/arch/um/sys-x86_64/bug.c @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL V2 + */ + +#include <linux/uaccess.h> + +/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because + * that's not relevent in skas mode. + */ + +int is_valid_bugaddr(unsigned long eip) +{ + unsigned short ud2; + + if (probe_kernel_address((unsigned short __user *)eip, ud2)) + return 0; + + return ud2 == 0x0b0f; +} |