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 int panic_timeout; |
20 | extern unsigned long panic_print; |
21 | extern int panic_on_oops; |
22 | extern int panic_on_unrecovered_nmi; |
23 | extern int panic_on_io_nmi; |
24 | extern int panic_on_warn; |
25 | |
26 | extern unsigned long panic_on_taint; |
27 | extern bool panic_on_taint_nousertaint; |
28 | |
29 | extern int sysctl_panic_on_rcu_stall; |
30 | extern int sysctl_max_rcu_stall_to_panic; |
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 | /* |
47 | * Only to be used by arch init code. If the user over-wrote the default |
48 | * CONFIG_PANIC_TIMEOUT, honor it. |
49 | */ |
50 | static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) |
51 | { |
52 | if (panic_timeout == arch_default_timeout) |
53 | panic_timeout = timeout; |
54 | } |
55 | |
56 | /* This cannot be an enum because some may be used in assembly source. */ |
57 | #define TAINT_PROPRIETARY_MODULE 0 |
58 | #define TAINT_FORCED_MODULE 1 |
59 | #define TAINT_CPU_OUT_OF_SPEC 2 |
60 | #define TAINT_FORCED_RMMOD 3 |
61 | #define TAINT_MACHINE_CHECK 4 |
62 | #define TAINT_BAD_PAGE 5 |
63 | #define TAINT_USER 6 |
64 | #define TAINT_DIE 7 |
65 | #define TAINT_OVERRIDDEN_ACPI_TABLE 8 |
66 | #define TAINT_WARN 9 |
67 | #define TAINT_CRAP 10 |
68 | #define TAINT_FIRMWARE_WORKAROUND 11 |
69 | #define TAINT_OOT_MODULE 12 |
70 | #define TAINT_UNSIGNED_MODULE 13 |
71 | #define TAINT_SOFTLOCKUP 14 |
72 | #define TAINT_LIVEPATCH 15 |
73 | #define TAINT_AUX 16 |
74 | #define TAINT_RANDSTRUCT 17 |
75 | #define TAINT_TEST 18 |
76 | #define TAINT_FLAGS_COUNT 19 |
77 | #define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1) |
78 | |
79 | struct taint_flag { |
80 | char c_true; /* character printed when tainted */ |
81 | char c_false; /* character printed when not tainted */ |
82 | bool module; /* also show as a per-module taint flag */ |
83 | }; |
84 | |
85 | extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; |
86 | |
87 | enum lockdep_ok { |
88 | LOCKDEP_STILL_OK, |
89 | LOCKDEP_NOW_UNRELIABLE, |
90 | }; |
91 | |
92 | extern const char *print_tainted(void); |
93 | extern void add_taint(unsigned flag, enum lockdep_ok); |
94 | extern int test_taint(unsigned flag); |
95 | extern unsigned long get_taint(void); |
96 | |
97 | #endif /* _LINUX_PANIC_H */ |
98 | |