35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LIVEPATCH_PATCH_H
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#define _LIVEPATCH_PATCH_H
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#include <linux/livepatch.h>
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#include <linux/list.h>
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#include <linux/ftrace.h>
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/**
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* struct klp_ops - structure for tracking registered ftrace ops structs
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*
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* A single ftrace_ops is shared between all enabled replacement functions
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* (klp_func structs) which have the same old_addr. This allows the switch
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* between function versions to happen instantaneously by updating the klp_ops
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* struct's func_stack list. The winner is the klp_func at the top of the
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* func_stack (front of the list).
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*
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* @node: node for the global klp_ops list
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* @func_stack: list head for the stack of klp_func's (active func is on top)
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* @fops: registered ftrace ops struct
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*/
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struct klp_ops {
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struct list_head node;
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struct list_head func_stack;
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struct ftrace_ops fops;
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};
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struct klp_ops *klp_find_ops(unsigned long old_addr);
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int klp_patch_object(struct klp_object *obj);
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void klp_unpatch_object(struct klp_object *obj);
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void klp_unpatch_objects(struct klp_patch *patch);
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#endif /* _LIVEPATCH_PATCH_H */
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