[mirror_ubuntu-bionic-kernel.git] / 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;
}
Commit	Line	Data
e182c965 JD	1	/*
	2	* Copyright (C) 2006 Jeff Dike (jdike@addtoit.com)
	3	* Licensed under the GPL V2
	4	*/
	5
	6	#include <linux/uaccess.h>
	7
95906b24 JD	8	/*
95906b24 JD	9	* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
b60745b9	10	* that's not relevant in skas mode.
e182c965 JD	11	*/
	12
	13	int is_valid_bugaddr(unsigned long eip)
	14	{
	15	unsigned short ud2;
	16
	17	if (probe_kernel_address((unsigned short __user *)eip, ud2))
	18	return 0;
	19
	20	return ud2 == 0x0b0f;
	21	}