aboutsummaryrefslogtreecommitdiff
path: root/arch/arm64/lib/error-inject.c
blob: ed15021da3ed0c77f4574ac6a3eda70a6464d565 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
// SPDX-License-Identifier: GPL-2.0

#include <linux/error-injection.h>
#include <linux/kprobes.h>

void override_function_with_return(struct pt_regs *regs)
{
	/*
	 * 'regs' represents the state on entry of a predefined function in
	 * the kernel/module and which is captured on a kprobe.
	 *
	 * When kprobe returns back from exception it will override the end
	 * of probed function and directly return to the predefined
	 * function's caller.
	 */
	instruction_pointer_set(regs, procedure_link_pointer(regs));
}
NOKPROBE_SYMBOL(override_function_with_return);