82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* code tagging framework
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*/
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#ifndef _LINUX_CODETAG_H
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#define _LINUX_CODETAG_H
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#include <linux/types.h>
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struct codetag_iterator;
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struct codetag_type;
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struct codetag_module;
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struct seq_buf;
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struct module;
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/*
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* An instance of this structure is created in a special ELF section at every
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* code location being tagged. At runtime, the special section is treated as
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* an array of these.
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*/
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struct codetag {
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unsigned int flags; /* used in later patches */
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unsigned int lineno;
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const char *modname;
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const char *function;
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const char *filename;
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} __aligned(8);
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union codetag_ref {
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struct codetag *ct;
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};
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struct codetag_type_desc {
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const char *section;
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size_t tag_size;
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void (*module_load)(struct codetag_type *cttype,
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struct codetag_module *cmod);
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bool (*module_unload)(struct codetag_type *cttype,
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struct codetag_module *cmod);
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};
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struct codetag_iterator {
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struct codetag_type *cttype;
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struct codetag_module *cmod;
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unsigned long mod_id;
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struct codetag *ct;
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};
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#ifdef MODULE
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#define CT_MODULE_NAME KBUILD_MODNAME
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#else
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#define CT_MODULE_NAME NULL
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#endif
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#define CODE_TAG_INIT { \
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.modname = CT_MODULE_NAME, \
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.function = __func__, \
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.filename = __FILE__, \
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.lineno = __LINE__, \
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.flags = 0, \
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}
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void codetag_lock_module_list(struct codetag_type *cttype, bool lock);
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bool codetag_trylock_module_list(struct codetag_type *cttype);
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struct codetag_iterator codetag_get_ct_iter(struct codetag_type *cttype);
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struct codetag *codetag_next_ct(struct codetag_iterator *iter);
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void codetag_to_text(struct seq_buf *out, struct codetag *ct);
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struct codetag_type *
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codetag_register_type(const struct codetag_type_desc *desc);
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#if defined(CONFIG_CODE_TAGGING) && defined(CONFIG_MODULES)
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void codetag_load_module(struct module *mod);
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bool codetag_unload_module(struct module *mod);
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#else
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static inline void codetag_load_module(struct module *mod) {}
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static inline bool codetag_unload_module(struct module *mod) { return true; }
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#endif
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#endif /* _LINUX_CODETAG_H */
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