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authorJeff Dike <jdike@addtoit.com>2006-12-08 02:36:23 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:28:39 -0800
commite182c965b6ce0dffed0967a1be2173825a2ede2f (patch)
tree287d3801dc660b4bc39da08400a68b6ea536e30e /arch/um/sys-i386/bug.c
parentc31a0bf3e1bc581676618db7492f18798fd0a73f (diff)
[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-i386/bug.c')
-rw-r--r--arch/um/sys-i386/bug.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/um/sys-i386/bug.c b/arch/um/sys-i386/bug.c
new file mode 100644
index 000000000000..200c8ba2879b
--- /dev/null
+++ b/arch/um/sys-i386/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;
+}