1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/error-injection.h> 4 #include <linux/kprobes.h> 5 6 void override_function_with_return(struct pt_regs *regs) 7 { 8 /* 9 * 'regs' represents the state on entry of a predefined function in 10 * the kernel/module and which is captured on a kprobe. 11 * 12 * When kprobe returns back from exception it will override the end 13 * of probed function and directly return to the predefined 14 * function's caller. 15 */ 16 instruction_pointer_set(regs, procedure_link_pointer(regs)); 17 } 18 NOKPROBE_SYMBOL(override_function_with_return); 19