arm64/lib/error-inject.c

0001 // SPDX-License-Identifier: GPL-2.0
0002
0003 #include <linux/error-injection.h>
0004 #include <linux/kprobes.h>
0005
0006 void override_function_with_return(struct pt_regs *regs)
0007 {
0008     /*
0009      * 'regs' represents the state on entry of a predefined function in
0010      * the kernel/module and which is captured on a kprobe.
0011      *
0012      * When kprobe returns back from exception it will override the end
0013      * of probed function and directly return to the predefined
0014      * function's caller.
0015      */
0016     instruction_pointer_set(regs, procedure_link_pointer(regs));
0017 }
0018 NOKPROBE_SYMBOL(override_function_with_return);