| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | |
| 3 | #include <linux/linkage.h> |
| 4 | #include <linux/error-injection.h> |
| 5 | #include <linux/kprobes.h> |
| 6 | #include <linux/objtool.h> |
| 7 | |
| 8 | asmlinkage void just_return_func(void); |
| 9 | |
| 10 | asm( |
| 11 | ".text\n" |
| 12 | ".type just_return_func, @function\n" |
| 13 | ".globl just_return_func\n" |
| 14 | ASM_FUNC_ALIGN |
| 15 | "just_return_func:\n" |
| 16 | ANNOTATE_NOENDBR |
| 17 | ASM_RET |
| 18 | ".size just_return_func, .-just_return_func\n" |
| 19 | ); |
| 20 | |
| 21 | void override_function_with_return(struct pt_regs *regs) |
| 22 | { |
| 23 | regs->ip = (unsigned long)&just_return_func; |
| 24 | } |
| 25 | NOKPROBE_SYMBOL(override_function_with_return); |
| 26 |