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 8struct pt_regs; 9 10extern long (*panic_blink)(int state); 11__printf(1, 2) 12void panic(const char *fmt, ...) __noreturn __cold; 13void nmi_panic(struct pt_regs *regs, const char *msg); 14void check_panic_on_warn(const char *origin); 15extern void oops_enter(void); 16extern void oops_exit(void); 17extern bool oops_may_print(void); 18 19extern int panic_timeout; 20extern unsigned long panic_print; 21extern int panic_on_oops; 22extern int panic_on_unrecovered_nmi; 23extern int panic_on_io_nmi; 24extern int panic_on_warn; 25 26extern unsigned long panic_on_taint; 27extern bool panic_on_taint_nousertaint; 28 29extern int sysctl_panic_on_rcu_stall; 30extern int sysctl_max_rcu_stall_to_panic; 31extern int sysctl_panic_on_stackoverflow; 32 33extern bool crash_kexec_post_notifiers; 34 35extern void __stack_chk_fail(void); 36void 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 */ 43extern 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 */ 50static 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 79struct 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 85extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 86 87enum lockdep_ok { 88 LOCKDEP_STILL_OK, 89 LOCKDEP_NOW_UNRELIABLE, 90}; 91 92extern const char *print_tainted(void); 93extern void add_taint(unsigned flag, enum lockdep_ok); 94extern int test_taint(unsigned flag); 95extern unsigned long get_taint(void); 96 97#endif /* _LINUX_PANIC_H */ 98