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)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