linux/include/linux/codetag.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * code tagging framework
 */
#ifndef _LINUX_CODETAG_H
#define _LINUX_CODETAG_H

#include <linux/types.h>

struct codetag_iterator;
struct codetag_type;
struct codetag_module;
struct seq_buf;
struct module;

/*
 * An instance of this structure is created in a special ELF section at every
 * code location being tagged.  At runtime, the special section is treated as
 * an array of these.
 */
struct codetag { … } __aligned(…);

codetag_ref;

struct codetag_type_desc { … };

struct codetag_iterator { … };

#ifdef MODULE
#define CT_MODULE_NAME …
#else
#define CT_MODULE_NAME …
#endif

#define CODE_TAG_INIT …

void codetag_lock_module_list(struct codetag_type *cttype, bool lock);
bool codetag_trylock_module_list(struct codetag_type *cttype);
struct codetag_iterator codetag_get_ct_iter(struct codetag_type *cttype);
struct codetag *codetag_next_ct(struct codetag_iterator *iter);

void codetag_to_text(struct seq_buf *out, struct codetag *ct);

struct codetag_type *
codetag_register_type(const struct codetag_type_desc *desc);

#if defined(CONFIG_CODE_TAGGING) && defined(CONFIG_MODULES)
void codetag_load_module(struct module *mod);
bool codetag_unload_module(struct module *mod);
#else
static inline void codetag_load_module(struct module *mod) { … }
static inline bool codetag_unload_module(struct module *mod) { … }
#endif

#endif /* _LINUX_CODETAG_H */