kernel/debug/kdb/kdb_private.h

   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 Error codes.  Must not overlap with command codes. */
  19 #define KDB_NOTFOUND    (-1)
  20 #define KDB_ARGCOUNT    (-2)
  21 #define KDB_BADWIDTH    (-3)
  22 #define KDB_BADRADIX    (-4)
  23 #define KDB_NOTENV      (-5)
  24 #define KDB_NOENVVALUE  (-6)
  25 #define KDB_NOTIMP      (-7)
  26 #define KDB_ENVFULL     (-8)
  27 #define KDB_ENVBUFFULL  (-9)
  28 #define KDB_TOOMANYBPT  (-10)
  29 #define KDB_TOOMANYDBREGS (-11)
  30 #define KDB_DUPBPT      (-12)
  31 #define KDB_BPTNOTFOUND (-13)
  32 #define KDB_BADMODE     (-14)
  33 #define KDB_BADINT      (-15)
  34 #define KDB_INVADDRFMT  (-16)
  35 #define KDB_BADREG      (-17)
  36 #define KDB_BADCPUNUM   (-18)
  37 #define KDB_BADLENGTH   (-19)
  38 #define KDB_NOBP        (-20)
  39 #define KDB_BADADDR     (-21)
  40
  41 /* Kernel Debugger Command codes.  Must not overlap with error codes. */
  42 #define KDB_CMD_GO      (-1001)
  43 #define KDB_CMD_CPU     (-1002)
  44 #define KDB_CMD_SS      (-1003)
  45 #define KDB_CMD_SSB     (-1004)
  46 #define KDB_CMD_KGDB (-1005)
  47 #define KDB_CMD_KGDB2 (-1006)
  48
  49 /* Internal debug flags */
  50 #define KDB_DEBUG_FLAG_BP       0x0002  /* Breakpoint subsystem debug */
  51 #define KDB_DEBUG_FLAG_BB_SUMM  0x0004  /* Basic block analysis, summary only */
  52 #define KDB_DEBUG_FLAG_AR       0x0008  /* Activation record, generic */
  53 #define KDB_DEBUG_FLAG_ARA      0x0010  /* Activation record, arch specific */
  54 #define KDB_DEBUG_FLAG_BB       0x0020  /* All basic block analysis */
  55 #define KDB_DEBUG_FLAG_STATE    0x0040  /* State flags */
  56 #define KDB_DEBUG_FLAG_MASK     0xffff  /* All debug flags */
  57 #define KDB_DEBUG_FLAG_SHIFT    16      /* Shift factor for dbflags */
  58
  59 #define KDB_DEBUG(flag) (kdb_flags & \
  60         (KDB_DEBUG_FLAG_##flag << KDB_DEBUG_FLAG_SHIFT))
  61 #define KDB_DEBUG_STATE(text, value) if (KDB_DEBUG(STATE)) \
  62                 kdb_print_state(text, value)
  63
  64 #if BITS_PER_LONG == 32
  65
  66 #define KDB_PLATFORM_ENV        "BYTESPERWORD=4"
  67
  68 #define kdb_machreg_fmt         "0x%lx"
  69 #define kdb_machreg_fmt0        "0x%08lx"
  70 #define kdb_bfd_vma_fmt         "0x%lx"
  71 #define kdb_bfd_vma_fmt0        "0x%08lx"
  72 #define kdb_elfw_addr_fmt       "0x%x"
  73 #define kdb_elfw_addr_fmt0      "0x%08x"
  74 #define kdb_f_count_fmt         "%d"
  75
  76 #elif BITS_PER_LONG == 64
  77
  78 #define KDB_PLATFORM_ENV        "BYTESPERWORD=8"
  79
  80 #define kdb_machreg_fmt         "0x%lx"
  81 #define kdb_machreg_fmt0        "0x%016lx"
  82 #define kdb_bfd_vma_fmt         "0x%lx"
  83 #define kdb_bfd_vma_fmt0        "0x%016lx"
  84 #define kdb_elfw_addr_fmt       "0x%x"
  85 #define kdb_elfw_addr_fmt0      "0x%016x"
  86 #define kdb_f_count_fmt         "%ld"
  87
  88 #endif
  89
  90 /*
  91  * KDB_MAXBPT describes the total number of breakpoints
  92  * supported by this architecure.
  93  */
  94 #define KDB_MAXBPT      16
  95
  96 /* Maximum number of arguments to a function  */
  97 #define KDB_MAXARGS    16
  98
  99 typedef enum {
 100         KDB_REPEAT_NONE = 0,    /* Do not repeat this command */
 101         KDB_REPEAT_NO_ARGS,     /* Repeat the command without arguments */
 102         KDB_REPEAT_WITH_ARGS,   /* Repeat the command including its arguments */
 103 } kdb_repeat_t;
 104
 105 typedef int (*kdb_func_t)(int, const char **);
 106
 107 /* Symbol table format returned by kallsyms. */
 108 typedef struct __ksymtab {
 109                 unsigned long value;    /* Address of symbol */
 110                 const char *mod_name;   /* Module containing symbol or
 111                                          * "kernel" */
 112                 unsigned long mod_start;
 113                 unsigned long mod_end;
 114                 const char *sec_name;   /* Section containing symbol */
 115                 unsigned long sec_start;
 116                 unsigned long sec_end;
 117                 const char *sym_name;   /* Full symbol name, including
 118                                          * any version */
 119                 unsigned long sym_start;
 120                 unsigned long sym_end;
 121                 } kdb_symtab_t;
 122 extern int kallsyms_symbol_next(char *prefix_name, int flag);
 123 extern int kallsyms_symbol_complete(char *prefix_name, int max_len);
 124
 125 /* Exported Symbols for kernel loadable modules to use. */
 126 extern int kdb_register(char *, kdb_func_t, char *, char *, short);
 127 extern int kdb_register_repeat(char *, kdb_func_t, char *, char *,
 128                                short, kdb_repeat_t);
 129 extern int kdb_unregister(char *);
 130
 131 extern int kdb_getarea_size(void *, unsigned long, size_t);
 132 extern int kdb_putarea_size(unsigned long, void *, size_t);
 133
 134 /*
 135  * Like get_user and put_user, kdb_getarea and kdb_putarea take variable
 136  * names, not pointers.  The underlying *_size functions take pointers.
 137  */
 138 #define kdb_getarea(x, addr) kdb_getarea_size(&(x), addr, sizeof((x)))
 139 #define kdb_putarea(addr, x) kdb_putarea_size(addr, &(x), sizeof((x)))
 140
 141 extern int kdb_getphysword(unsigned long *word,
 142                         unsigned long addr, size_t size);
 143 extern int kdb_getword(unsigned long *, unsigned long, size_t);
 144 extern int kdb_putword(unsigned long, unsigned long, size_t);
 145
 146 extern int kdbgetularg(const char *, unsigned long *);
 147 extern int kdb_set(int, const char **);
 148 extern char *kdbgetenv(const char *);
 149 extern int kdbgetintenv(const char *, int *);
 150 extern int kdbgetaddrarg(int, const char **, int*, unsigned long *,
 151                          long *, char **);
 152 extern int kdbgetsymval(const char *, kdb_symtab_t *);
 153 extern int kdbnearsym(unsigned long, kdb_symtab_t *);
 154 extern void kdbnearsym_cleanup(void);
 155 extern char *kdb_strdup(const char *str, gfp_t type);
 156 extern void kdb_symbol_print(unsigned long, const kdb_symtab_t *, unsigned int);
 157
 158 /* Routine for debugging the debugger state. */
 159 extern void kdb_print_state(const char *, int);
 160
 161 extern int kdb_state;
 162 #define KDB_STATE_KDB           0x00000001      /* Cpu is inside kdb */
 163 #define KDB_STATE_LEAVING       0x00000002      /* Cpu is leaving kdb */
 164 #define KDB_STATE_CMD           0x00000004      /* Running a kdb command */
 165 #define KDB_STATE_KDB_CONTROL   0x00000008      /* This cpu is under
 166                                                  * kdb control */
 167 #define KDB_STATE_HOLD_CPU      0x00000010      /* Hold this cpu inside kdb */
 168 #define KDB_STATE_DOING_SS      0x00000020      /* Doing ss command */
 169 #define KDB_STATE_DOING_SSB     0x00000040      /* Doing ssb command,
 170                                                  * DOING_SS is also set */
 171 #define KDB_STATE_SSBPT         0x00000080      /* Install breakpoint
 172                                                  * after one ss, independent of
 173                                                  * DOING_SS */
 174 #define KDB_STATE_REENTRY       0x00000100      /* Valid re-entry into kdb */
 175 #define KDB_STATE_SUPPRESS      0x00000200      /* Suppress error messages */
 176 #define KDB_STATE_PAGER         0x00000400      /* pager is available */
 177 #define KDB_STATE_GO_SWITCH     0x00000800      /* go is switching
 178                                                  * back to initial cpu */
 179 #define KDB_STATE_PRINTF_LOCK   0x00001000      /* Holds kdb_printf lock */
 180 #define KDB_STATE_WAIT_IPI      0x00002000      /* Waiting for kdb_ipi() NMI */
 181 #define KDB_STATE_RECURSE       0x00004000      /* Recursive entry to kdb */
 182 #define KDB_STATE_IP_ADJUSTED   0x00008000      /* Restart IP has been
 183                                                  * adjusted */
 184 #define KDB_STATE_GO1           0x00010000      /* go only releases one cpu */
 185 #define KDB_STATE_KEYBOARD      0x00020000      /* kdb entered via
 186                                                  * keyboard on this cpu */
 187 #define KDB_STATE_KEXEC         0x00040000      /* kexec issued */
 188 #define KDB_STATE_DOING_KGDB    0x00080000      /* kgdb enter now issued */
 189 #define KDB_STATE_DOING_KGDB2   0x00100000      /* kgdb enter now issued */
 190 #define KDB_STATE_KGDB_TRANS    0x00200000      /* Transition to kgdb */
 191 #define KDB_STATE_ARCH          0xff000000      /* Reserved for arch
 192                                                  * specific use */
 193
 194 #define KDB_STATE(flag) (kdb_state & KDB_STATE_##flag)
 195 #define KDB_STATE_SET(flag) ((void)(kdb_state |= KDB_STATE_##flag))
 196 #define KDB_STATE_CLEAR(flag) ((void)(kdb_state &= ~KDB_STATE_##flag))
 197
 198 extern int kdb_nextline; /* Current number of lines displayed */
 199
 200 typedef struct _kdb_bp {
 201         unsigned long   bp_addr;        /* Address breakpoint is present at */
 202         unsigned int    bp_free:1;      /* This entry is available */
 203         unsigned int    bp_enabled:1;   /* Breakpoint is active in register */
 204         unsigned int    bp_type:4;      /* Uses hardware register */
 205         unsigned int    bp_installed:1; /* Breakpoint is installed */
 206         unsigned int    bp_delay:1;     /* Do delayed bp handling */
 207         unsigned int    bp_delayed:1;   /* Delayed breakpoint */
 208         unsigned int    bph_length;     /* HW break length */
 209 } kdb_bp_t;
 210
 211 #ifdef CONFIG_KGDB_KDB
 212 extern kdb_bp_t kdb_breakpoints[/* KDB_MAXBPT */];
 213
 214 /* The KDB shell command table */
 215 typedef struct _kdbtab {
 216         char    *cmd_name;              /* Command name */
 217         kdb_func_t cmd_func;            /* Function to execute command */
 218         char    *cmd_usage;             /* Usage String for this command */
 219         char    *cmd_help;              /* Help message for this command */
 220         short    cmd_flags;             /* Parsing flags */
 221         short    cmd_minlen;            /* Minimum legal # command
 222                                          * chars required */
 223         kdb_repeat_t cmd_repeat;        /* Does command auto repeat on enter? */
 224 } kdbtab_t;
 225
 226 extern int kdb_bt(int, const char **);  /* KDB display back trace */
 227
 228 /* KDB breakpoint management functions */
 229 extern void kdb_initbptab(void);
 230 extern void kdb_bp_install(struct pt_regs *);
 231 extern void kdb_bp_remove(void);
 232
 233 typedef enum {
 234         KDB_DB_BPT,     /* Breakpoint */
 235         KDB_DB_SS,      /* Single-step trap */
 236         KDB_DB_SSB,     /* Single step to branch */
 237         KDB_DB_SSBPT,   /* Single step over breakpoint */
 238         KDB_DB_NOBPT    /* Spurious breakpoint */
 239 } kdb_dbtrap_t;
 240
 241 extern int kdb_main_loop(kdb_reason_t, kdb_reason_t,
 242                          int, kdb_dbtrap_t, struct pt_regs *);
 243
 244 /* Miscellaneous functions and data areas */
 245 extern int kdb_grepping_flag;
 246 extern char kdb_grep_string[];
 247 extern int kdb_grep_leading;
 248 extern int kdb_grep_trailing;
 249 extern char *kdb_cmds[];
 250 extern void kdb_syslog_data(char *syslog_data[]);
 251 extern unsigned long kdb_task_state_string(const char *);
 252 extern char kdb_task_state_char (const struct task_struct *);
 253 extern unsigned long kdb_task_state(const struct task_struct *p,
 254                                     unsigned long mask);
 255 extern void kdb_ps_suppressed(void);
 256 extern void kdb_ps1(const struct task_struct *p);
 257 extern void kdb_print_nameval(const char *name, unsigned long val);
 258 extern void kdb_send_sig_info(struct task_struct *p, struct siginfo *info);
 259 extern void kdb_meminfo_proc_show(void);
 260 extern const char *kdb_walk_kallsyms(loff_t *pos);
 261 extern char *kdb_getstr(char *, size_t, char *);
 262
 263 /* Defines for kdb_symbol_print */
 264 #define KDB_SP_SPACEB   0x0001          /* Space before string */
 265 #define KDB_SP_SPACEA   0x0002          /* Space after string */
 266 #define KDB_SP_PAREN    0x0004          /* Parenthesis around string */
 267 #define KDB_SP_VALUE    0x0008          /* Print the value of the address */
 268 #define KDB_SP_SYMSIZE  0x0010          /* Print the size of the symbol */
 269 #define KDB_SP_NEWLINE  0x0020          /* Newline after string */
 270 #define KDB_SP_DEFAULT (KDB_SP_VALUE|KDB_SP_PAREN)
 271
 272 #define KDB_TSK(cpu) kgdb_info[cpu].task
 273 #define KDB_TSKREGS(cpu) kgdb_info[cpu].debuggerinfo
 274
 275 extern struct task_struct *kdb_curr_task(int);
 276
 277 #define kdb_task_has_cpu(p) (task_curr(p))
 278
 279 /* Simplify coexistence with NPTL */
 280 #define kdb_do_each_thread(g, p) do_each_thread(g, p)
 281 #define kdb_while_each_thread(g, p) while_each_thread(g, p)
 282
 283 #define GFP_KDB (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
 284
 285 extern void *debug_kmalloc(size_t size, gfp_t flags);
 286 extern void debug_kfree(void *);
 287 extern void debug_kusage(void);
 288
 289 extern void kdb_set_current_task(struct task_struct *);
 290 extern struct task_struct *kdb_current_task;
 291 #ifdef CONFIG_MODULES
 292 extern struct list_head *kdb_modules;
 293 #endif /* CONFIG_MODULES */
 294
 295 extern char kdb_prompt_str[];
 296
 297 #define KDB_WORD_SIZE   ((int)sizeof(unsigned long))
 298
 299 #endif /* CONFIG_KGDB_KDB */
 300 #endif  /* !_KDBPRIVATE_H */