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/stdarg.h>
7 #include <linux/types.h>
8
9 struct pt_regs;
10
11 extern long (*panic_blink)(int state);
12 __printf(1, 2)
13 void panic(const char *fmt, ...) __noreturn __cold;
14 __printf(1, 0)
15 void vpanic(const char *fmt, va_list args) __noreturn __cold;
16 void nmi_panic(struct pt_regs *regs, const char *msg);
17 void check_panic_on_warn(const char *origin);
18 extern void oops_enter(void);
19 extern void oops_exit(void);
20 extern bool oops_may_print(void);
21
22 extern bool panic_triggering_all_cpu_backtrace;
23 extern int panic_timeout;
24 extern unsigned long panic_print;
25 extern int panic_on_oops;
26 extern int panic_on_warn;
27
28 extern unsigned long panic_on_taint;
29 extern bool panic_on_taint_nousertaint;
30
31 extern int sysctl_panic_on_stackoverflow;
32
33 extern bool crash_kexec_post_notifiers;
34
35 extern void __stack_chk_fail(void);
36 void abort(void);
37
38 /*
39 * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It
40 * holds a CPU number which is executing panic() currently. A value of
41 * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec().
42 */
43 extern atomic_t panic_cpu;
44 #define PANIC_CPU_INVALID -1
45
46 bool panic_try_start(void);
47 void panic_reset(void);
48 bool panic_in_progress(void);
49 bool panic_on_this_cpu(void);
50 bool panic_on_other_cpu(void);
51
52 /*
53 * Only to be used by arch init code. If the user over-wrote the default
54 * CONFIG_PANIC_TIMEOUT, honor it.
55 */
set_arch_panic_timeout(int timeout,int arch_default_timeout)56 static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout)
57 {
58 if (panic_timeout == arch_default_timeout)
59 panic_timeout = timeout;
60 }
61
62 /* This cannot be an enum because some may be used in assembly source. */
63 #define TAINT_PROPRIETARY_MODULE 0
64 #define TAINT_FORCED_MODULE 1
65 #define TAINT_CPU_OUT_OF_SPEC 2
66 #define TAINT_FORCED_RMMOD 3
67 #define TAINT_MACHINE_CHECK 4
68 #define TAINT_BAD_PAGE 5
69 #define TAINT_USER 6
70 #define TAINT_DIE 7
71 #define TAINT_OVERRIDDEN_ACPI_TABLE 8
72 #define TAINT_WARN 9
73 #define TAINT_CRAP 10
74 #define TAINT_FIRMWARE_WORKAROUND 11
75 #define TAINT_OOT_MODULE 12
76 #define TAINT_UNSIGNED_MODULE 13
77 #define TAINT_SOFTLOCKUP 14
78 #define TAINT_LIVEPATCH 15
79 #define TAINT_AUX 16
80 #define TAINT_RANDSTRUCT 17
81 #define TAINT_TEST 18
82 #define TAINT_FWCTL 19
83 #define TAINT_FLAGS_COUNT 20
84 #define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1)
85
86 struct taint_flag {
87 char c_true; /* character printed when tainted */
88 char c_false; /* character printed when not tainted */
89 bool module; /* also show as a per-module taint flag */
90 const char *desc; /* verbose description of the set taint flag */
91 };
92
93 extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT];
94
95 enum lockdep_ok {
96 LOCKDEP_STILL_OK,
97 LOCKDEP_NOW_UNRELIABLE,
98 };
99
100 extern const char *print_tainted(void);
101 extern const char *print_tainted_verbose(void);
102 extern void add_taint(unsigned flag, enum lockdep_ok);
103 extern int test_taint(unsigned flag);
104 extern unsigned long get_taint(void);
105
106 #endif /* _LINUX_PANIC_H */
107