| 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, val: procedure_link_pointer(regs)); |
| 17 | } |
| 18 | NOKPROBE_SYMBOL(override_function_with_return); |
| 19 |