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 */
51 static 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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.