Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/error-injection.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/kprobes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) void override_function_with_return(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	 * 'regs' represents the state on entry of a predefined function in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	 * the kernel/module and which is captured on a kprobe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	 * When kprobe returns back from exception it will override the end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	 * of probed function and directly return to the predefined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	 * function's caller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	instruction_pointer_set(regs, procedure_link_pointer(regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) NOKPROBE_SYMBOL(override_function_with_return);