/* 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 { unsigned int flags; /* used in later patches */ 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; void (*module_load)(struct codetag_type *cttype, struct codetag_module *cmod); bool (*module_unload)(struct codetag_type *cttype, struct codetag_module *cmod); }; struct codetag_iterator { struct codetag_type *cttype; struct codetag_module *cmod; unsigned long mod_id; struct codetag *ct; }; #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 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) { return true; } #endif #endif /* _LINUX_CODETAG_H */