| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | |
| 3 | #include <linux/error-injection.h> |
| 4 | #include <linux/kprobes.h> |
| 5 | #include <linux/uaccess.h> |
| 6 | |
| 7 | void override_function_with_return(struct pt_regs *regs) |
| 8 | { |
| 9 | /* |
| 10 | * Emulate 'blr'. 'regs' represents the state on entry of a predefined |
| 11 | * function in the kernel/module, captured on a kprobe. We don't need |
| 12 | * to worry about 32-bit userspace on a 64-bit kernel. |
| 13 | */ |
| 14 | regs->nip = regs->link; |
| 15 | } |
| 16 | NOKPROBE_SYMBOL(override_function_with_return); |