linux/arch/x86/um/bug.c

/*
 * 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 relevant 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;
}
[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> 2006-12-08 02:36:23 -08:00			`/*`
			`* Copyright (C) 2006 Jeff Dike (jdike@addtoit.com)`
			`* Licensed under the GPL V2`
			`*/`

			`#include <linux/uaccess.h>`

uml: style fixes in arch/um/sys-x86_64 Style fixes in arch/um/sys-x86_64: updated copyrights CodingStyle fixes added severities to printks which needed them A bunch of functions in sys-*/ptrace_user.c turn out to be unused, so they and their declarations are gone. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-02-04 22:31:20 -08:00			`/*`
			`* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because`
spelling fixes: arch/um/ Spelling fixes in arch/um/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Adrian Bunk <bunk@kernel.org> 2007-10-20 01:23:03 +02:00			`* that's not relevant in skas mode.`
[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> 2006-12-08 02:36:23 -08:00			`*/`

			`int is_valid_bugaddr(unsigned long eip)`
			`{`
			`unsigned short ud2;`

			`if (probe_kernel_address((unsigned short __user *)eip, ud2))`
			`return 0;`

			`return ud2 == 0x0b0f;`
			`}`