17664c5a1SJeremy Fitzhardinge #ifndef _LINUX_BUG_H 27664c5a1SJeremy Fitzhardinge #define _LINUX_BUG_H 37664c5a1SJeremy Fitzhardinge 47664c5a1SJeremy Fitzhardinge #include <asm/bug.h> 5a3ccc497SDaniel Santos #include <linux/compiler.h> 6*bc6245e5SIan Abbott #include <linux/build_bug.h> 77664c5a1SJeremy Fitzhardinge 87664c5a1SJeremy Fitzhardinge enum bug_trap_type { 97664c5a1SJeremy Fitzhardinge BUG_TRAP_TYPE_NONE = 0, 107664c5a1SJeremy Fitzhardinge BUG_TRAP_TYPE_WARN = 1, 117664c5a1SJeremy Fitzhardinge BUG_TRAP_TYPE_BUG = 2, 127664c5a1SJeremy Fitzhardinge }; 137664c5a1SJeremy Fitzhardinge 14608e2619SHeiko Carstens struct pt_regs; 15608e2619SHeiko Carstens 1635edd910SPaul Gortmaker #ifdef __CHECKER__ 17ff20c2e0SKirill A. Shutemov #define MAYBE_BUILD_BUG_ON(cond) (0) 1835edd910SPaul Gortmaker #else /* __CHECKER__ */ 1935edd910SPaul Gortmaker 20ff20c2e0SKirill A. Shutemov #define MAYBE_BUILD_BUG_ON(cond) \ 21ff20c2e0SKirill A. Shutemov do { \ 22ff20c2e0SKirill A. Shutemov if (__builtin_constant_p((cond))) \ 23ff20c2e0SKirill A. Shutemov BUILD_BUG_ON(cond); \ 24ff20c2e0SKirill A. Shutemov else \ 25ff20c2e0SKirill A. Shutemov BUG_ON(cond); \ 26ff20c2e0SKirill A. Shutemov } while (0) 27ff20c2e0SKirill A. Shutemov 2835edd910SPaul Gortmaker #endif /* __CHECKER__ */ 2935edd910SPaul Gortmaker 307664c5a1SJeremy Fitzhardinge #ifdef CONFIG_GENERIC_BUG 317664c5a1SJeremy Fitzhardinge #include <asm-generic/bug.h> 327664c5a1SJeremy Fitzhardinge 337664c5a1SJeremy Fitzhardinge static inline int is_warning_bug(const struct bug_entry *bug) 347664c5a1SJeremy Fitzhardinge { 357664c5a1SJeremy Fitzhardinge return bug->flags & BUGFLAG_WARNING; 367664c5a1SJeremy Fitzhardinge } 377664c5a1SJeremy Fitzhardinge 3819d43626SPeter Zijlstra struct bug_entry *find_bug(unsigned long bugaddr); 397664c5a1SJeremy Fitzhardinge 40608e2619SHeiko Carstens enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs); 417664c5a1SJeremy Fitzhardinge 427664c5a1SJeremy Fitzhardinge /* These are defined by the architecture */ 437664c5a1SJeremy Fitzhardinge int is_valid_bugaddr(unsigned long addr); 447664c5a1SJeremy Fitzhardinge 457664c5a1SJeremy Fitzhardinge #else /* !CONFIG_GENERIC_BUG */ 467664c5a1SJeremy Fitzhardinge 47608e2619SHeiko Carstens static inline enum bug_trap_type report_bug(unsigned long bug_addr, 48608e2619SHeiko Carstens struct pt_regs *regs) 497664c5a1SJeremy Fitzhardinge { 507664c5a1SJeremy Fitzhardinge return BUG_TRAP_TYPE_BUG; 517664c5a1SJeremy Fitzhardinge } 527664c5a1SJeremy Fitzhardinge 537664c5a1SJeremy Fitzhardinge #endif /* CONFIG_GENERIC_BUG */ 54de54ebbeSKees Cook 55de54ebbeSKees Cook /* 56de54ebbeSKees Cook * Since detected data corruption should stop operation on the affected 5785caa95bSKees Cook * structures. Return value must be checked and sanely acted on by caller. 58de54ebbeSKees Cook */ 5985caa95bSKees Cook static inline __must_check bool check_data_corruption(bool v) { return v; } 60de54ebbeSKees Cook #define CHECK_DATA_CORRUPTION(condition, fmt, ...) \ 6185caa95bSKees Cook check_data_corruption(({ \ 6285caa95bSKees Cook bool corruption = unlikely(condition); \ 6385caa95bSKees Cook if (corruption) { \ 64de54ebbeSKees Cook if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \ 65de54ebbeSKees Cook pr_err(fmt, ##__VA_ARGS__); \ 66de54ebbeSKees Cook BUG(); \ 67de54ebbeSKees Cook } else \ 68de54ebbeSKees Cook WARN(1, fmt, ##__VA_ARGS__); \ 69de54ebbeSKees Cook } \ 7085caa95bSKees Cook corruption; \ 7185caa95bSKees Cook })) 72de54ebbeSKees Cook 737664c5a1SJeremy Fitzhardinge #endif /* _LINUX_BUG_H */ 74