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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117/* 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;
#define CODETAG_SECTION_START_PREFIX "__start_"#define CODETAG_SECTION_STOP_PREFIX "__stop_"
/* codetag flags */#define CODETAG_FLAG_INACCURATE (1 << 0)
/* * 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 { unsigned int flags; unsigned int lineno; const char *modname; const char *function; const char *filename;} __aligned(8);
union codetag_ref { struct codetag *ct;};
struct codetag_type_desc { const char *section; size_t tag_size; int (*module_load)(struct module *mod, struct codetag *start, struct codetag *end); void (*module_unload)(struct module *mod, struct codetag *start, struct codetag *end);#ifdef CONFIG_MODULES void (*module_replaced)(struct module *mod, struct module *new_mod); bool (*needs_section_mem)(struct module *mod, unsigned long size); void *(*alloc_section_mem)(struct module *mod, unsigned long size, unsigned int prepend, unsigned long align); void (*free_section_mem)(struct module *mod, bool used);#endif};
struct codetag_iterator { struct codetag_type *cttype; struct codetag_module *cmod; unsigned long mod_id; struct codetag *ct; unsigned long mod_seq;};
#ifdef MODULE#define CT_MODULE_NAME KBUILD_MODNAME#else#define CT_MODULE_NAME NULL#endif
#define CODE_TAG_INIT { \ .modname = CT_MODULE_NAME, \ .function = __func__, \ .filename = __FILE__, \ .lineno = __LINE__, \ .flags = 0, \}
void codetag_lock_module_list(struct codetag_type *cttype);bool codetag_trylock_module_list(struct codetag_type *cttype);void codetag_unlock_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)
bool codetag_needs_module_section(struct module *mod, const char *name, unsigned long size);void *codetag_alloc_module_section(struct module *mod, const char *name, unsigned long size, unsigned int prepend, unsigned long align);void codetag_free_module_sections(struct module *mod);void codetag_module_replaced(struct module *mod, struct module *new_mod);int codetag_load_module(struct module *mod);void codetag_unload_module(struct module *mod);
#else /* defined(CONFIG_CODE_TAGGING) && defined(CONFIG_MODULES) */
static inline boolcodetag_needs_module_section(struct module *mod, const char *name, unsigned long size) { return false; }static inline void *codetag_alloc_module_section(struct module *mod, const char *name, unsigned long size, unsigned int prepend, unsigned long align) { return NULL; }static inline void codetag_free_module_sections(struct module *mod) {}static inline void codetag_module_replaced(struct module *mod, struct module *new_mod) {}static inline int codetag_load_module(struct module *mod) { return 0; }static inline void codetag_unload_module(struct module *mod) {}
#endif /* defined(CONFIG_CODE_TAGGING) && defined(CONFIG_MODULES) */
#endif /* _LINUX_CODETAG_H */