1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_PANIC_H 3 #define _LINUX_PANIC_H 4 5 #include <linux/compiler_attributes.h> 6 #include <linux/types.h> 7 8 struct pt_regs; 9 10 extern long (*panic_blink)(int state); 11 __printf(1, 2) 12 void panic(const char *fmt, ...) __noreturn __cold; 13 void nmi_panic(struct pt_regs *regs, const char *msg); 14 void check_panic_on_warn(const char *origin); 15 extern void oops_enter(void); 16 extern void oops_exit(void); 17 extern bool oops_may_print(void); 18 19 extern bool panic_triggering_all_cpu_backtrace; 20 extern int panic_timeout; 21 extern unsigned long panic_print; 22 extern int panic_on_oops; 23 extern int panic_on_unrecovered_nmi; 24 extern int panic_on_io_nmi; 25 extern int panic_on_warn; 26 27 extern unsigned long panic_on_taint; 28 extern bool panic_on_taint_nousertaint; 29 30 extern int sysctl_panic_on_rcu_stall; 31 extern int sysctl_max_rcu_stall_to_panic; 32 extern int sysctl_panic_on_stackoverflow; 33 34 extern bool crash_kexec_post_notifiers; 35 36 extern void __stack_chk_fail(void); 37 void abort(void); 38 39 /* 40 * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It 41 * holds a CPU number which is executing panic() currently. A value of 42 * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec(). 43 */ 44 extern atomic_t panic_cpu; 45 #define PANIC_CPU_INVALID -1 46 47 /* 48 * Only to be used by arch init code. If the user over-wrote the default 49 * CONFIG_PANIC_TIMEOUT, honor it. 50 */ set_arch_panic_timeout(int timeout,int arch_default_timeout)51static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) 52 { 53 if (panic_timeout == arch_default_timeout) 54 panic_timeout = timeout; 55 } 56 57 /* This cannot be an enum because some may be used in assembly source. */ 58 #define TAINT_PROPRIETARY_MODULE 0 59 #define TAINT_FORCED_MODULE 1 60 #define TAINT_CPU_OUT_OF_SPEC 2 61 #define TAINT_FORCED_RMMOD 3 62 #define TAINT_MACHINE_CHECK 4 63 #define TAINT_BAD_PAGE 5 64 #define TAINT_USER 6 65 #define TAINT_DIE 7 66 #define TAINT_OVERRIDDEN_ACPI_TABLE 8 67 #define TAINT_WARN 9 68 #define TAINT_CRAP 10 69 #define TAINT_FIRMWARE_WORKAROUND 11 70 #define TAINT_OOT_MODULE 12 71 #define TAINT_UNSIGNED_MODULE 13 72 #define TAINT_SOFTLOCKUP 14 73 #define TAINT_LIVEPATCH 15 74 #define TAINT_AUX 16 75 #define TAINT_RANDSTRUCT 17 76 #define TAINT_TEST 18 77 #define TAINT_FLAGS_COUNT 19 78 #define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1) 79 80 struct taint_flag { 81 char c_true; /* character printed when tainted */ 82 char c_false; /* character printed when not tainted */ 83 bool module; /* also show as a per-module taint flag */ 84 const char *desc; /* verbose description of the set taint flag */ 85 }; 86 87 extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 88 89 enum lockdep_ok { 90 LOCKDEP_STILL_OK, 91 LOCKDEP_NOW_UNRELIABLE, 92 }; 93 94 extern const char *print_tainted(void); 95 extern const char *print_tainted_verbose(void); 96 extern void add_taint(unsigned flag, enum lockdep_ok); 97 extern int test_taint(unsigned flag); 98 extern unsigned long get_taint(void); 99 100 #endif /* _LINUX_PANIC_H */ 101