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c349cdca JP |
1 | #ifndef _LIVEPATCH_PATCH_H |
2 | #define _LIVEPATCH_PATCH_H | |
3 | ||
4 | #include <linux/livepatch.h> | |
5 | #include <linux/list.h> | |
6 | #include <linux/ftrace.h> | |
7 | ||
8 | /** | |
9 | * struct klp_ops - structure for tracking registered ftrace ops structs | |
10 | * | |
11 | * A single ftrace_ops is shared between all enabled replacement functions | |
12 | * (klp_func structs) which have the same old_addr. This allows the switch | |
13 | * between function versions to happen instantaneously by updating the klp_ops | |
14 | * struct's func_stack list. The winner is the klp_func at the top of the | |
15 | * func_stack (front of the list). | |
16 | * | |
17 | * @node: node for the global klp_ops list | |
18 | * @func_stack: list head for the stack of klp_func's (active func is on top) | |
19 | * @fops: registered ftrace ops struct | |
20 | */ | |
21 | struct klp_ops { | |
22 | struct list_head node; | |
23 | struct list_head func_stack; | |
24 | struct ftrace_ops fops; | |
25 | }; | |
26 | ||
27 | struct klp_ops *klp_find_ops(unsigned long old_addr); | |
28 | ||
29 | int klp_patch_object(struct klp_object *obj); | |
30 | void klp_unpatch_object(struct klp_object *obj); | |
d83a7cb3 | 31 | void klp_unpatch_objects(struct klp_patch *patch); |
c349cdca JP |
32 | |
33 | #endif /* _LIVEPATCH_PATCH_H */ |