109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/* 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);
|
|
void (*module_unload)(struct codetag_type *cttype,
|
|
struct codetag_module *cmod);
|
|
#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;
|
|
};
|
|
|
|
#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)
|
|
|
|
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);
|
|
void codetag_load_module(struct module *mod);
|
|
void codetag_unload_module(struct module *mod);
|
|
|
|
#else /* defined(CONFIG_CODE_TAGGING) && defined(CONFIG_MODULES) */
|
|
|
|
static inline bool
|
|
codetag_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 void codetag_load_module(struct module *mod) {}
|
|
static inline void codetag_unload_module(struct module *mod) {}
|
|
|
|
#endif /* defined(CONFIG_CODE_TAGGING) && defined(CONFIG_MODULES) */
|
|
|
|
#endif /* _LINUX_CODETAG_H */
|