Quelle  core.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIVEPATCH_CORE_H
#define _LIVEPATCH_CORE_H

#include <linux/livepatch.h>

extern struct mutex klp_mutex;
extern struct list_head klp_patches;

#define klp_for_each_patch_safe(patch, tmp_patch)  \
 list_for_each_entry_safe(patch, tmp_patch, &klp_patches, list)

#define klp_for_each_patch(patch) \
 list_for_each_entry(patch, &klp_patches, list)

void klp_free_patch_async(struct klp_patch *patch);
void klp_free_replaced_patches_async(struct klp_patch *new_patch);
void klp_unpatch_replaced_patches(struct klp_patch *new_patch);
void klp_discard_nops(struct klp_patch *new_patch);

static inline bool klp_is_object_loaded(struct klp_object *obj)
{
 return !obj->name || obj->mod;
}

static inline int klp_pre_patch_callback(struct klp_object *obj)
{
 int ret = 0;

 if (obj->callbacks.pre_patch)
  ret = (*obj->callbacks.pre_patch)(obj);

 obj->callbacks.post_unpatch_enabled = !ret;

 return ret;
}

static inline void klp_post_patch_callback(struct klp_object *obj)
{
 if (obj->callbacks.post_patch)
  (*obj->callbacks.post_patch)(obj);
}

static inline void klp_pre_unpatch_callback(struct klp_object *obj)
{
 if (obj->callbacks.pre_unpatch)
  (*obj->callbacks.pre_unpatch)(obj);
}

static inline void klp_post_unpatch_callback(struct klp_object *obj)
{
 if (obj->callbacks.post_unpatch_enabled &&
     obj->callbacks.post_unpatch)
  (*obj->callbacks.post_unpatch)(obj);

 obj->callbacks.post_unpatch_enabled = false;
}

#endif /* _LIVEPATCH_CORE_H */