error-inject.c

 1// SPDX-License-Identifier: GPL-2.0+
 2
 3#include <linux/error-injection.h>
 4#include <linux/kprobes.h>
 5#include <linux/uaccess.h>
 6
 7void override_function_with_return(struct pt_regs *regs)
 8{
 9	/*
10	 * Emulate 'blr'. 'regs' represents the state on entry of a predefined
11	 * function in the kernel/module, captured on a kprobe. We don't need
12	 * to worry about 32-bit userspace on a 64-bit kernel.
13	 */
14	regs_set_return_ip(regs, regs->link);
15}
16NOKPROBE_SYMBOL(override_function_with_return);