LXR linux/kernel/debug/kdb/kdb

   1#ifndef _KDBPRIVATE_H
   2#define _KDBPRIVATE_H
   3
   4/*
   5 * Kernel Debugger Architecture Independent Private Headers
   6 *
   7 * This file is subject to the terms and conditions of the GNU General Public
   8 * License.  See the file "COPYING" in the main directory of this archive
   9 * for more details.
  10 *
  11 * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
  12 * Copyright (c) 2009 Wind River Systems, Inc.  All Rights Reserved.
  13 */
  14
  15#include <linux/kgdb.h>
  16#include "../debug_core.h"
  17
  18/* Kernel Debugger Command codes.  Must not overlap with error codes. */
  19#define KDB_CMD_GO      (-1001)
  20#define KDB_CMD_CPU     (-1002)
  21#define KDB_CMD_SS      (-1003)
  22#define KDB_CMD_KGDB (-1005)
  23
  24/* Internal debug flags */
  25#define KDB_DEBUG_FLAG_BP       0x0002  /* Breakpoint subsystem debug */
  26#define KDB_DEBUG_FLAG_BB_SUMM  0x0004  /* Basic block analysis, summary only */
  27#define KDB_DEBUG_FLAG_AR       0x0008  /* Activation record, generic */
  28#define KDB_DEBUG_FLAG_ARA      0x0010  /* Activation record, arch specific */
  29#define KDB_DEBUG_FLAG_BB       0x0020  /* All basic block analysis */
  30#define KDB_DEBUG_FLAG_STATE    0x0040  /* State flags */
  31#define KDB_DEBUG_FLAG_MASK     0xffff  /* All debug flags */
  32#define KDB_DEBUG_FLAG_SHIFT    16      /* Shift factor for dbflags */
  33
  34#define KDB_DEBUG(flag) (kdb_flags & \
  35        (KDB_DEBUG_FLAG_##flag << KDB_DEBUG_FLAG_SHIFT))
  36#define KDB_DEBUG_STATE(text, value) if (KDB_DEBUG(STATE)) \
  37                kdb_print_state(text, value)
  38
  39#if BITS_PER_LONG == 32
  40
  41#define KDB_PLATFORM_ENV        "BYTESPERWORD=4"
  42
  43#define kdb_machreg_fmt         "0x%lx"
  44#define kdb_machreg_fmt0        "0x%08lx"
  45#define kdb_bfd_vma_fmt         "0x%lx"
  46#define kdb_bfd_vma_fmt0        "0x%08lx"
  47#define kdb_elfw_addr_fmt       "0x%x"
  48#define kdb_elfw_addr_fmt0      "0x%08x"
  49#define kdb_f_count_fmt         "%d"
  50
  51#elif BITS_PER_LONG == 64
  52
  53#define KDB_PLATFORM_ENV        "BYTESPERWORD=8"
  54
  55#define kdb_machreg_fmt         "0x%lx"
  56#define kdb_machreg_fmt0        "0x%016lx"
  57#define kdb_bfd_vma_fmt         "0x%lx"
  58#define kdb_bfd_vma_fmt0        "0x%016lx"
  59#define kdb_elfw_addr_fmt       "0x%x"
  60#define kdb_elfw_addr_fmt0      "0x%016x"
  61#define kdb_f_count_fmt         "%ld"
  62
  63#endif
  64
  65/*
  66 * KDB_MAXBPT describes the total number of breakpoints
  67 * supported by this architecure.
  68 */
  69#define KDB_MAXBPT      16
  70
  71/* Symbol table format returned by kallsyms. */
  72typedef struct __ksymtab {
  73                unsigned long value;    /* Address of symbol */
  74                const char *mod_name;   /* Module containing symbol or
  75                                         * "kernel" */
  76                unsigned long mod_start;
  77                unsigned long mod_end;
  78                const char *sec_name;   /* Section containing symbol */
  79                unsigned long sec_start;
  80                unsigned long sec_end;
  81                const char *sym_name;   /* Full symbol name, including
  82                                         * any version */
  83                unsigned long sym_start;
  84                unsigned long sym_end;
  85                } kdb_symtab_t;
  86extern int kallsyms_symbol_next(char *prefix_name, int flag);
  87extern int kallsyms_symbol_complete(char *prefix_name, int max_len);
  88
  89/* Exported Symbols for kernel loadable modules to use. */
  90extern int kdb_getarea_size(void *, unsigned long, size_t);
  91extern int kdb_putarea_size(unsigned long, void *, size_t);
  92
  93/*
  94 * Like get_user and put_user, kdb_getarea and kdb_putarea take variable
  95 * names, not pointers.  The underlying *_size functions take pointers.
  96 */
  97#define kdb_getarea(x, addr) kdb_getarea_size(&(x), addr, sizeof((x)))
  98#define kdb_putarea(addr, x) kdb_putarea_size(addr, &(x), sizeof((x)))
  99
 100extern int kdb_getphysword(unsigned long *word,
 101                        unsigned long addr, size_t size);
 102extern int kdb_getword(unsigned long *, unsigned long, size_t);
 103extern int kdb_putword(unsigned long, unsigned long, size_t);
 104
 105extern int kdbgetularg(const char *, unsigned long *);
 106extern int kdbgetu64arg(const char *, u64 *);
 107extern char *kdbgetenv(const char *);
 108extern int kdbgetaddrarg(int, const char **, int*, unsigned long *,
 109                         long *, char **);
 110extern int kdbgetsymval(const char *, kdb_symtab_t *);
 111extern int kdbnearsym(unsigned long, kdb_symtab_t *);
 112extern void kdbnearsym_cleanup(void);
 113extern char *kdb_strdup(const char *str, gfp_t type);
 114extern void kdb_symbol_print(unsigned long, const kdb_symtab_t *, unsigned int);
 115
 116/* Routine for debugging the debugger state. */
 117extern void kdb_print_state(const char *, int);
 118
 119extern int kdb_state;
 120#define KDB_STATE_KDB           0x00000001      /* Cpu is inside kdb */
 121#define KDB_STATE_LEAVING       0x00000002      /* Cpu is leaving kdb */
 122#define KDB_STATE_CMD           0x00000004      /* Running a kdb command */
 123#define KDB_STATE_KDB_CONTROL   0x00000008      /* This cpu is under
 124                                                 * kdb control */
 125#define KDB_STATE_HOLD_CPU      0x00000010      /* Hold this cpu inside kdb */
 126#define KDB_STATE_DOING_SS      0x00000020      /* Doing ss command */
 127#define KDB_STATE_SSBPT         0x00000080      /* Install breakpoint
 128                                                 * after one ss, independent of
 129                                                 * DOING_SS */
 130#define KDB_STATE_REENTRY       0x00000100      /* Valid re-entry into kdb */
 131#define KDB_STATE_SUPPRESS      0x00000200      /* Suppress error messages */
 132#define KDB_STATE_PAGER         0x00000400      /* pager is available */
 133#define KDB_STATE_GO_SWITCH     0x00000800      /* go is switching
 134                                                 * back to initial cpu */
 135#define KDB_STATE_WAIT_IPI      0x00002000      /* Waiting for kdb_ipi() NMI */
 136#define KDB_STATE_RECURSE       0x00004000      /* Recursive entry to kdb */
 137#define KDB_STATE_IP_ADJUSTED   0x00008000      /* Restart IP has been
 138                                                 * adjusted */
 139#define KDB_STATE_GO1           0x00010000      /* go only releases one cpu */
 140#define KDB_STATE_KEYBOARD      0x00020000      /* kdb entered via
 141                                                 * keyboard on this cpu */
 142#define KDB_STATE_KEXEC         0x00040000      /* kexec issued */
 143#define KDB_STATE_DOING_KGDB    0x00080000      /* kgdb enter now issued */
 144#define KDB_STATE_KGDB_TRANS    0x00200000      /* Transition to kgdb */
 145#define KDB_STATE_ARCH          0xff000000      /* Reserved for arch
 146                                                 * specific use */
 147
 148#define KDB_STATE(flag) (kdb_state & KDB_STATE_##flag)
 149#define KDB_STATE_SET(flag) ((void)(kdb_state |= KDB_STATE_##flag))
 150#define KDB_STATE_CLEAR(flag) ((void)(kdb_state &= ~KDB_STATE_##flag))
 151
 152extern int kdb_nextline; /* Current number of lines displayed */
 153
 154typedef struct _kdb_bp {
 155        unsigned long   bp_addr;        /* Address breakpoint is present at */
 156        unsigned int    bp_free:1;      /* This entry is available */
 157        unsigned int    bp_enabled:1;   /* Breakpoint is active in register */
 158        unsigned int    bp_type:4;      /* Uses hardware register */
 159        unsigned int    bp_installed:1; /* Breakpoint is installed */
 160        unsigned int    bp_delay:1;     /* Do delayed bp handling */
 161        unsigned int    bp_delayed:1;   /* Delayed breakpoint */
 162        unsigned int    bph_length;     /* HW break length */
 163} kdb_bp_t;
 164
 165#ifdef CONFIG_KGDB_KDB
 166extern kdb_bp_t kdb_breakpoints[/* KDB_MAXBPT */];
 167
 168/* The KDB shell command table */
 169typedef struct _kdbtab {
 170        char    *cmd_name;              /* Command name */
 171        kdb_func_t cmd_func;            /* Function to execute command */
 172        char    *cmd_usage;             /* Usage String for this command */
 173        char    *cmd_help;              /* Help message for this command */
 174        short    cmd_minlen;            /* Minimum legal # command
 175                                         * chars required */
 176        kdb_cmdflags_t cmd_flags;       /* Command behaviour flags */
 177} kdbtab_t;
 178
 179extern int kdb_bt(int, const char **);  /* KDB display back trace */
 180
 181/* KDB breakpoint management functions */
 182extern void kdb_initbptab(void);
 183extern void kdb_bp_install(struct pt_regs *);
 184extern void kdb_bp_remove(void);
 185
 186typedef enum {
 187        KDB_DB_BPT,     /* Breakpoint */
 188        KDB_DB_SS,      /* Single-step trap */
 189        KDB_DB_SSBPT,   /* Single step over breakpoint */
 190        KDB_DB_NOBPT    /* Spurious breakpoint */
 191} kdb_dbtrap_t;
 192
 193extern int kdb_main_loop(kdb_reason_t, kdb_reason_t,
 194                         int, kdb_dbtrap_t, struct pt_regs *);
 195
 196/* Miscellaneous functions and data areas */
 197extern int kdb_grepping_flag;
 198#define KDB_GREPPING_FLAG_SEARCH 0x8000
 199extern char kdb_grep_string[];
 200#define KDB_GREP_STRLEN 256
 201extern int kdb_grep_leading;
 202extern int kdb_grep_trailing;
 203extern char *kdb_cmds[];
 204extern unsigned long kdb_task_state_string(const char *);
 205extern char kdb_task_state_char (const struct task_struct *);
 206extern unsigned long kdb_task_state(const struct task_struct *p,
 207                                    unsigned long mask);
 208extern void kdb_ps_suppressed(void);
 209extern void kdb_ps1(const struct task_struct *p);
 210extern void kdb_print_nameval(const char *name, unsigned long val);
 211extern void kdb_send_sig_info(struct task_struct *p, struct siginfo *info);
 212extern void kdb_meminfo_proc_show(void);
 213extern char *kdb_getstr(char *, size_t, const char *);
 214extern void kdb_gdb_state_pass(char *buf);
 215
 216/* Defines for kdb_symbol_print */
 217#define KDB_SP_SPACEB   0x0001          /* Space before string */
 218#define KDB_SP_SPACEA   0x0002          /* Space after string */
 219#define KDB_SP_PAREN    0x0004          /* Parenthesis around string */
 220#define KDB_SP_VALUE    0x0008          /* Print the value of the address */
 221#define KDB_SP_SYMSIZE  0x0010          /* Print the size of the symbol */
 222#define KDB_SP_NEWLINE  0x0020          /* Newline after string */
 223#define KDB_SP_DEFAULT (KDB_SP_VALUE|KDB_SP_PAREN)
 224
 225#define KDB_TSK(cpu) kgdb_info[cpu].task
 226#define KDB_TSKREGS(cpu) kgdb_info[cpu].debuggerinfo
 227
 228extern struct task_struct *kdb_curr_task(int);
 229
 230#define kdb_task_has_cpu(p) (task_curr(p))
 231
 232/* Simplify coexistence with NPTL */
 233#define kdb_do_each_thread(g, p) do_each_thread(g, p)
 234#define kdb_while_each_thread(g, p) while_each_thread(g, p)
 235
 236#define GFP_KDB (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
 237
 238extern void *debug_kmalloc(size_t size, gfp_t flags);
 239extern void debug_kfree(void *);
 240extern void debug_kusage(void);
 241
 242extern void kdb_set_current_task(struct task_struct *);
 243extern struct task_struct *kdb_current_task;
 244
 245#ifdef CONFIG_KDB_KEYBOARD
 246extern void kdb_kbd_cleanup_state(void);
 247#else /* ! CONFIG_KDB_KEYBOARD */
 248#define kdb_kbd_cleanup_state()
 249#endif /* ! CONFIG_KDB_KEYBOARD */
 250
 251#ifdef CONFIG_MODULES
 252extern struct list_head *kdb_modules;
 253#endif /* CONFIG_MODULES */
 254
 255extern char kdb_prompt_str[];
 256
 257#define KDB_WORD_SIZE   ((int)sizeof(unsigned long))
 258
 259#endif /* CONFIG_KGDB_KDB */
 260#endif  /* !_KDBPRIVATE_H */
 261