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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240/* SPDX-License-Identifier: GPL-2.0 */#ifndef _KDB_H#define _KDB_H
/* * Kernel Debugger Architecture Independent Global Headers * * Copyright (c) 2000-2007 Silicon Graphics, Inc. All Rights Reserved. * Copyright (C) 2000 Stephane Eranian <eranian@hpl.hp.com> * Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com> */
#include <linux/list.h>#include <linux/smp.h>
/* Shifted versions of the command enable bits are be used if the command * has no arguments (see kdb_check_flags). This allows commands, such as * go, to have different permissions depending upon whether it is called * with an argument. */#define KDB_ENABLE_NO_ARGS_SHIFT 10
typedef enum { KDB_ENABLE_ALL = (1 << 0), /* Enable everything */ KDB_ENABLE_MEM_READ = (1 << 1), KDB_ENABLE_MEM_WRITE = (1 << 2), KDB_ENABLE_REG_READ = (1 << 3), KDB_ENABLE_REG_WRITE = (1 << 4), KDB_ENABLE_INSPECT = (1 << 5), KDB_ENABLE_FLOW_CTRL = (1 << 6), KDB_ENABLE_SIGNAL = (1 << 7), KDB_ENABLE_REBOOT = (1 << 8), /* User exposed values stop here, all remaining flags are * exclusively used to describe a commands behaviour. */
KDB_ENABLE_ALWAYS_SAFE = (1 << 9), KDB_ENABLE_MASK = (1 << KDB_ENABLE_NO_ARGS_SHIFT) - 1,
KDB_ENABLE_ALL_NO_ARGS = KDB_ENABLE_ALL << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_MEM_READ_NO_ARGS = KDB_ENABLE_MEM_READ << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_MEM_WRITE_NO_ARGS = KDB_ENABLE_MEM_WRITE << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_REG_READ_NO_ARGS = KDB_ENABLE_REG_READ << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_REG_WRITE_NO_ARGS = KDB_ENABLE_REG_WRITE << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_INSPECT_NO_ARGS = KDB_ENABLE_INSPECT << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_FLOW_CTRL_NO_ARGS = KDB_ENABLE_FLOW_CTRL << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_SIGNAL_NO_ARGS = KDB_ENABLE_SIGNAL << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_REBOOT_NO_ARGS = KDB_ENABLE_REBOOT << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_ALWAYS_SAFE_NO_ARGS = KDB_ENABLE_ALWAYS_SAFE << KDB_ENABLE_NO_ARGS_SHIFT, KDB_ENABLE_MASK_NO_ARGS = KDB_ENABLE_MASK << KDB_ENABLE_NO_ARGS_SHIFT,
KDB_REPEAT_NO_ARGS = 0x40000000, /* Repeat the command w/o arguments */ KDB_REPEAT_WITH_ARGS = 0x80000000, /* Repeat the command with args */} kdb_cmdflags_t;
typedef int (*kdb_func_t)(int, const char **);
/* The KDB shell command table */typedef struct _kdbtab { char *name; /* Command name */ kdb_func_t func; /* Function to execute command */ char *usage; /* Usage String for this command */ char *help; /* Help message for this command */ short minlen; /* Minimum legal # cmd chars required */ kdb_cmdflags_t flags; /* Command behaviour flags */ struct list_head list_node; /* Command list */} kdbtab_t;
#ifdef CONFIG_KGDB_KDB#include <linux/init.h>#include <linux/sched.h>#include <linux/atomic.h>
#define KDB_POLL_FUNC_MAX 5extern int kdb_poll_idx;
/* * kdb_initial_cpu is initialized to -1, and is set to the cpu * number whenever the kernel debugger is entered. */extern int kdb_initial_cpu;
/* Types and messages used for dynamically added kdb shell commands */
#define KDB_MAXARGS 16 /* Maximum number of arguments to a function */
/* KDB return codes from a command or internal kdb function */#define KDB_NOTFOUND (-1)#define KDB_ARGCOUNT (-2)#define KDB_BADWIDTH (-3)#define KDB_BADRADIX (-4)#define KDB_NOTENV (-5)#define KDB_NOENVVALUE (-6)#define KDB_NOTIMP (-7)#define KDB_ENVFULL (-8)#define KDB_KMALLOCFAILED (-9)#define KDB_TOOMANYBPT (-10)#define KDB_TOOMANYDBREGS (-11)#define KDB_DUPBPT (-12)#define KDB_BPTNOTFOUND (-13)#define KDB_BADMODE (-14)#define KDB_BADINT (-15)#define KDB_INVADDRFMT (-16)#define KDB_BADREG (-17)#define KDB_BADCPUNUM (-18)#define KDB_BADLENGTH (-19)#define KDB_NOBP (-20)#define KDB_BADADDR (-21)#define KDB_NOPERM (-22)
/* * kdb_diemsg * * Contains a pointer to the last string supplied to the * kernel 'die' panic function. */extern const char *kdb_diemsg;
#define KDB_FLAG_EARLYKDB (1 << 0) /* set from boot parameter kdb=early */#define KDB_FLAG_CATASTROPHIC (1 << 1) /* A catastrophic event has occurred */#define KDB_FLAG_CMD_INTERRUPT (1 << 2) /* Previous command was interrupted */#define KDB_FLAG_NOIPI (1 << 3) /* Do not send IPIs */#define KDB_FLAG_NO_CONSOLE (1 << 5) /* No console is available, * kdb is disabled */#define KDB_FLAG_NO_VT_CONSOLE (1 << 6) /* No VT console is available, do * not use keyboard */#define KDB_FLAG_NO_I8042 (1 << 7) /* No i8042 chip is available, do * not use keyboard */
extern unsigned int kdb_flags; /* Global flags, see kdb_state for per cpu state */
#define KDB_FLAG(flag) (kdb_flags & KDB_FLAG_##flag)#define KDB_FLAG_SET(flag) ((void)(kdb_flags |= KDB_FLAG_##flag))#define KDB_FLAG_CLEAR(flag) ((void)(kdb_flags &= ~KDB_FLAG_##flag))
/* * External entry point for the kernel debugger. The pt_regs * at the time of entry are supplied along with the reason for * entry to the kernel debugger. */
typedef enum { KDB_REASON_ENTER = 1, /* KDB_ENTER() trap/fault - regs valid */ KDB_REASON_ENTER_SLAVE, /* KDB_ENTER_SLAVE() trap/fault - regs valid */ KDB_REASON_BREAK, /* Breakpoint inst. - regs valid */ KDB_REASON_DEBUG, /* Debug Fault - regs valid */ KDB_REASON_OOPS, /* Kernel Oops - regs valid */ KDB_REASON_SWITCH, /* CPU switch - regs valid*/ KDB_REASON_KEYBOARD, /* Keyboard entry - regs valid */ KDB_REASON_NMI, /* Non-maskable interrupt; regs valid */ KDB_REASON_RECURSE, /* Recursive entry to kdb; * regs probably valid */ KDB_REASON_SSTEP, /* Single Step trap. - regs valid */ KDB_REASON_SYSTEM_NMI, /* In NMI due to SYSTEM cmd; regs valid */} kdb_reason_t;
enum kdb_msgsrc { KDB_MSGSRC_INTERNAL, /* direct call to kdb_printf() */ KDB_MSGSRC_PRINTK, /* trapped from printk() */};
extern int kdb_trap_printk;extern int kdb_printf_cpu;extern __printf(2, 0) int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list args);extern __printf(1, 2) int kdb_printf(const char *, ...);typedef __printf(1, 2) int (*kdb_printf_t)(const char *, ...);
extern void kdb_init(int level);
/* Access to kdb specific polling devices */typedef int (*get_char_func)(void);extern get_char_func kdb_poll_funcs[];extern int kdb_get_kbd_char(void);
static inlineint kdb_process_cpu(const struct task_struct *p){ unsigned int cpu = task_cpu(p); if (cpu > num_possible_cpus()) cpu = 0; return cpu;}
extern void kdb_send_sig(struct task_struct *p, int sig);
#ifdef CONFIG_KALLSYMSextern const char *kdb_walk_kallsyms(loff_t *pos);#else /* ! CONFIG_KALLSYMS */static inline const char *kdb_walk_kallsyms(loff_t *pos){ return NULL;}#endif /* ! CONFIG_KALLSYMS */
/* Dynamic kdb shell command registration */extern int kdb_register(kdbtab_t *cmd);extern void kdb_unregister(kdbtab_t *cmd);
/* Return true when KDB as locked for printing a message on this CPU. */static inlinebool kdb_printf_on_this_cpu(void){ /* * We can use raw_smp_processor_id() here because the task could * not get migrated when KDB has locked for printing on this CPU. */ return unlikely(READ_ONCE(kdb_printf_cpu) == raw_smp_processor_id());}
#else /* ! CONFIG_KGDB_KDB */static inline __printf(1, 2) int kdb_printf(const char *fmt, ...) { return 0; }static inline void kdb_init(int level) {}static inline int kdb_register(kdbtab_t *cmd) { return 0; }static inline void kdb_unregister(kdbtab_t *cmd) {}
static inline bool kdb_printf_on_this_cpu(void) { return false; }
#endif /* CONFIG_KGDB_KDB */enum { KDB_NOT_INITIALIZED, KDB_INIT_EARLY, KDB_INIT_FULL,};
extern int kdbgetintenv(const char *, int *);extern int kdb_set(int, const char **);int kdb_lsmod(int argc, const char **argv);
#endif /* !_KDB_H */