bsd/sys/dtrace_glue.h

   1 /*
   2  * Copyright (c) 2005-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _DTRACE_GLUE_H
  30 #define _DTRACE_GLUE_H
  31
  32 #ifdef KERNEL_BUILD
  33
  34 #include <libkern/libkern.h>
  35 #include <kern/lock.h>
  36 #include <kern/locks.h>
  37 #include <kern/thread_call.h>
  38 #include <kern/thread.h>
  39 #include <machine/machine_routines.h>
  40 #include <sys/syslog.h>
  41 #include <sys/ucred.h>
  42 #include <stdarg.h>
  43 #include <mach/kmod.h>
  44 #include <libkern/OSAtomic.h>
  45
  46 #if defined(__i386__) || defined(__x86_64__)
  47 #include <i386/mp.h>
  48 #endif
  49
  50 /*
  51  * cmn_err
  52  */
  53 #define CE_CONT         0       /* continuation         */
  54 #define CE_NOTE         1       /* notice               */
  55 #define CE_WARN         2       /* warning              */
  56 #define CE_PANIC        3       /* panic                */
  57 #define CE_IGNORE       4       /* print nothing        */
  58
  59 extern void cmn_err( int, const char *, ... );
  60
  61 /*
  62  * pid/proc
  63  */
  64
  65 /* Solaris proc_t is the struct. Darwin's proc_t is a pointer to it. */
  66 #define proc_t struct proc /* Steer clear of the Darwin typedef for proc_t */
  67 #define curproc ((struct proc *)current_proc()) /* Called from probe context, must blacklist */
  68
  69 proc_t* sprlock(pid_t pid);
  70 void sprunlock(proc_t *p);
  71
  72 /*
  73  * uread/uwrite
  74  */
  75
  76 int uread(proc_t *p, void *buf, user_size_t len, user_addr_t a);
  77 int uwrite(proc_t *p, void *buf, user_size_t len, user_addr_t a);
  78
  79 /*
  80  * fuword / suword
  81  */
  82
  83 int fuword8(user_addr_t, uint8_t *);
  84 int fuword16(user_addr_t, uint16_t *);
  85 int fuword32(user_addr_t, uint32_t *);
  86 int fuword64(user_addr_t, uint64_t *);
  87
  88 void fuword8_noerr(user_addr_t, uint8_t *);
  89 void fuword16_noerr(user_addr_t, uint16_t *);
  90 void fuword32_noerr(user_addr_t, uint32_t *);
  91 void fuword64_noerr(user_addr_t, uint64_t *);
  92
  93 int suword64(user_addr_t, uint64_t value);
  94 int suword32(user_addr_t, uint32_t value);
  95 int suword16(user_addr_t, uint16_t value);
  96 int suword8(user_addr_t, uint8_t value);
  97
  98 /*
  99  * cpuvar
 100  */
 101 extern lck_mtx_t cpu_lock;
 102 extern lck_mtx_t mod_lock;
 103
 104 /*
 105  * Per-CPU data.
 106  */
 107 typedef struct dtrace_cpu {
 108         processorid_t   cpu_id;                    /* CPU number */
 109         struct dtrace_cpu *cpu_next;                 /* next existing CPU */
 110         lck_rw_t        cpu_ft_lock;               /* DTrace: fasttrap lock */
 111         uintptr_t       cpu_dtrace_caller;         /* DTrace: caller, if any */
 112         hrtime_t        cpu_dtrace_chillmark;      /* DTrace: chill mark time */
 113         hrtime_t        cpu_dtrace_chilled;        /* DTrace: total chill time */
 114         boolean_t       cpu_dtrace_invop_underway; /* DTrace gaurds against invalid op re-entrancy */
 115 } dtrace_cpu_t;
 116
 117 extern dtrace_cpu_t *cpu_list;
 118
 119 /*
 120  * The cpu_core structure consists of per-CPU state available in any context.
 121  * On some architectures, this may mean that the page(s) containing the
 122  * NCPU-sized array of cpu_core structures must be locked in the TLB -- it
 123  * is up to the platform to assure that this is performed properly.  Note that
 124  * the structure is sized to avoid false sharing.
 125  */
 126 #define CPU_CACHE_COHERENCE_SIZE        64
 127
 128 typedef struct cpu_core {
 129         uint64_t        cpuc_dtrace_illval;     /* DTrace illegal value */
 130         lck_mtx_t       cpuc_pid_lock;          /* DTrace pid provider lock */
 131         uint16_t        cpuc_dtrace_flags;      /* DTrace flags */
 132         uint64_t        cpuc_missing_tos;       /* Addr. of top most stack frame if missing */
 133         uint8_t         cpuc_pad[CPU_CACHE_COHERENCE_SIZE - sizeof(uint64_t) - sizeof(lck_mtx_t) - sizeof(uint16_t) - sizeof(uint64_t) ];       /* padding */
 134 } cpu_core_t;
 135
 136 extern cpu_core_t *cpu_core;
 137
 138 extern unsigned int dtrace_max_cpus;            /* max number of enabled cpus */
 139 #define NCPU        dtrace_max_cpus
 140
 141 extern int cpu_number(void); /* From #include <kern/cpu_number.h>. Called from probe context, must blacklist. */
 142
 143 #define CPU             (&(cpu_list[cpu_number()]))     /* Pointer to current CPU */
 144 #define CPU_ON_INTR(cpup) ml_at_interrupt_context() /* always invoked on current cpu */
 145
 146 /*
 147  * Routines used to register interest in cpu's being added to or removed
 148  * from the system.
 149  */
 150 typedef enum {
 151         CPU_INIT,
 152         CPU_CONFIG,
 153         CPU_UNCONFIG,
 154         CPU_ON,
 155         CPU_OFF,
 156         CPU_CPUPART_IN,
 157         CPU_CPUPART_OUT
 158 } cpu_setup_t;
 159
 160 typedef int cpu_setup_func_t(cpu_setup_t, int, void *);
 161
 162 extern void register_cpu_setup_func(cpu_setup_func_t *, void *);
 163 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
 164
 165 /*
 166  * CPU_DTRACE
 167  */
 168
 169 /*
 170  * DTrace flags.
 171  */
 172 #define CPU_DTRACE_NOFAULT      0x0001  /* Don't fault */
 173 #define CPU_DTRACE_DROP         0x0002  /* Drop this ECB */
 174 #define CPU_DTRACE_BADADDR      0x0004  /* DTrace fault: bad address */
 175 #define CPU_DTRACE_BADALIGN     0x0008  /* DTrace fault: bad alignment */
 176 #define CPU_DTRACE_DIVZERO      0x0010  /* DTrace fault: divide by zero */
 177 #define CPU_DTRACE_ILLOP        0x0020  /* DTrace fault: illegal operation */
 178 #define CPU_DTRACE_NOSCRATCH    0x0040  /* DTrace fault: out of scratch */
 179 #define CPU_DTRACE_KPRIV        0x0080  /* DTrace fault: bad kernel access */
 180 #define CPU_DTRACE_UPRIV        0x0100  /* DTrace fault: bad user access */
 181 #define CPU_DTRACE_TUPOFLOW     0x0200  /* DTrace fault: tuple stack overflow */
 182 #if defined(__sparc)
 183 //#define       CPU_DTRACE_FAKERESTORE  0x0400  /* pid provider hint to getreg */
 184 #endif
 185 #define CPU_DTRACE_USTACK_FP    0x0400  /* pid provider hint to ustack() */
 186 #define CPU_DTRACE_ENTRY        0x0800  /* pid provider hint to ustack() */
 187 #define CPU_DTRACE_BADSTACK 0x1000  /* DTrace fault: bad stack */
 188
 189 #define CPU_DTRACE_FAULT        (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \
 190                                 CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \
 191                                 CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \
 192                                 CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \
 193                                 CPU_DTRACE_BADSTACK)
 194 #define CPU_DTRACE_ERROR        (CPU_DTRACE_FAULT | CPU_DTRACE_DROP)
 195
 196 /*
 197  * Loadable Modules
 198  */
 199
 200 /* Keep the compiler happy */
 201 struct dtrace_module_symbols;
 202
 203 /* Solaris' modctl structure, greatly simplified, shadowing parts of xnu kmod structure. */
 204 typedef struct modctl {
 205         struct modctl   *mod_next;
 206         struct modctl   *mod_stale;     // stale module chain
 207         uint32_t        mod_id;         // the kext unique identifier
 208         char            mod_modname[KMOD_MAX_NAME];
 209         int             mod_loadcnt;
 210         char            mod_loaded;
 211         char            mod_flags;      // See flags below
 212         int             mod_nenabled;   // # of enabled DTrace probes in module
 213         vm_address_t    mod_address;    // starting address (of Mach-o header blob)
 214         vm_size_t       mod_size;       // total size (of blob)
 215         UUID            mod_uuid;
 216         struct dtrace_module_symbols* mod_user_symbols;
 217 } modctl_t;
 218
 219 /* Definitions for mod_flags */
 220 #define MODCTL_IS_MACH_KERNEL                   0x01 // This module represents /mach_kernel
 221 #define MODCTL_HAS_KERNEL_SYMBOLS               0x02 // Kernel symbols (nlist) are available
 222 #define MODCTL_FBT_PROBES_PROVIDED              0x04 // fbt probes have been provided
 223 #define MODCTL_FBT_INVALID                      0x08 // Module is invalid for fbt probes
 224 #define MODCTL_SDT_PROBES_PROVIDED              0x10 // sdt probes have been provided
 225 #define MODCTL_SDT_INVALID                      0x20 // Module is invalid for sdt probes
 226 #define MODCTL_HAS_UUID                         0x40 // Module has UUID
 227
 228 /* Simple/singular mod_flags accessors */
 229 #define MOD_IS_MACH_KERNEL(mod)                 (mod->mod_flags & MODCTL_IS_MACH_KERNEL)
 230 #define MOD_HAS_KERNEL_SYMBOLS(mod)             (mod->mod_flags & MODCTL_HAS_KERNEL_SYMBOLS)
 231 #define MOD_HAS_USERSPACE_SYMBOLS(mod)          (mod->mod_user_symbols) /* No point in duplicating state in the flags bits */
 232 #define MOD_FBT_PROBES_PROVIDED(mod)            (mod->mod_flags & MODCTL_FBT_PROBES_PROVIDED)
 233 #define MOD_FBT_INVALID(mod)                    (mod->mod_flags & MODCTL_FBT_INVALID)
 234 #define MOD_SDT_PROBES_PROVIDED(mod)            (mod->mod_flags & MODCTL_SDT_PROBES_PROVIDED)
 235 #define MOD_SDT_INVALID(mod)                    (mod->mod_flags & MODCTL_SDT_INVALID)
 236 #define MOD_HAS_UUID(mod)                       (mod->mod_flags & MODCTL_HAS_UUID)
 237
 238 /* Compound accessors */
 239 #define MOD_FBT_DONE(mod)                       (MOD_FBT_PROBES_PROVIDED(mod) || MOD_FBT_INVALID(mod))
 240 #define MOD_SDT_DONE(mod)                       (MOD_SDT_PROBES_PROVIDED(mod) || MOD_SDT_INVALID(mod))
 241 #define MOD_SYMBOLS_DONE(mod)                   (MOD_FBT_DONE(mod) && MOD_SDT_DONE(mod))
 242
 243 extern modctl_t *dtrace_modctl_list;
 244
 245 /*
 246  * cred_t
 247  */
 248 /* Privileges */
 249 #define PRIV_DTRACE_KERNEL        3
 250 #define PRIV_DTRACE_PROC          4
 251 #define PRIV_DTRACE_USER          5
 252 #define PRIV_PROC_OWNER          30
 253 #define PRIV_PROC_ZONE           35
 254 #define PRIV_ALL                        (-1)    /* All privileges required */
 255
 256 /* Privilege sets */
 257 #define PRIV_EFFECTIVE            0
 258
 259 typedef struct ucred cred_t;
 260 #define cr_suid cr_svuid
 261 #define cr_sgid cr_svgid
 262
 263 extern cred_t *dtrace_CRED(void); /* Safe to call from probe context. */
 264 #define CRED() kauth_cred_get() /* Can't be called from probe context! */
 265 extern int PRIV_POLICY_CHOICE(void *, int, int);
 266 extern int PRIV_POLICY_ONLY(void *, int, int);
 267 extern gid_t crgetgid(const cred_t *);
 268 extern uid_t crgetuid(const cred_t *);
 269 #define crgetzoneid(x) ((zoneid_t)0)
 270
 271 #define crhold(a) {}
 272 #define crfree(a) {}
 273
 274 /*
 275  * "cyclic"
 276  */
 277 #define CY_LOW_LEVEL            0
 278 #define CY_LOCK_LEVEL           1
 279 #define CY_HIGH_LEVEL           2
 280 #define CY_SOFT_LEVELS          2
 281 #define CY_LEVELS                       3
 282
 283 typedef uintptr_t cyclic_id_t;
 284 typedef cyclic_id_t *cyclic_id_list_t;
 285 typedef uint16_t cyc_level_t;
 286 typedef void (*cyc_func_t)(void *);
 287
 288 #define CYCLIC_NONE             ((cyclic_id_t)0)
 289
 290 typedef struct cyc_time {
 291         hrtime_t cyt_when;
 292         hrtime_t cyt_interval;
 293 } cyc_time_t;
 294
 295 typedef struct cyc_handler {
 296         cyc_func_t cyh_func;
 297         void *cyh_arg;
 298         cyc_level_t cyh_level;
 299 } cyc_handler_t;
 300
 301 typedef struct cyc_omni_handler {
 302         void (*cyo_online)(void *, dtrace_cpu_t *, cyc_handler_t *, cyc_time_t *);
 303         void (*cyo_offline)(void *, dtrace_cpu_t *, void *);
 304         void *cyo_arg;
 305 } cyc_omni_handler_t;
 306
 307 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
 308 extern void cyclic_remove(cyclic_id_t);
 309
 310 extern cyclic_id_list_t cyclic_add_omni(cyc_omni_handler_t *);
 311 extern void cyclic_remove_omni(cyclic_id_list_t);
 312
 313 extern cyclic_id_t cyclic_timer_add(cyc_handler_t *, cyc_time_t *);
 314 extern void cyclic_timer_remove(cyclic_id_t);
 315
 316 /*
 317  * timeout / untimeout (converted to dtrace_timeout / dtrace_untimeout due to name collision)
 318  */
 319
 320 thread_call_t dtrace_timeout(void (*func)(void *, void *), void* arg, uint64_t nanos);
 321
 322 /*
 323  * ddi
 324  */
 325
 326 #define DDI_SUCCESS                     0
 327 #define DDI_FAILURE                     -1
 328
 329 #define DDI_DEV_T_NONE  ((dev_t)-1)
 330 #define DDI_DEV_T_ANY   ((dev_t)-2)
 331 #define DDI_MAJOR_T_UNKNOWN     ((major_t)0)
 332
 333 #define DDI_PSEUDO "ddi_pseudo"
 334
 335 typedef enum {
 336         DDI_ATTACH = 0,
 337         DDI_RESUME = 1,
 338         DDI_PM_RESUME = 2
 339 } ddi_attach_cmd_t;
 340
 341 typedef enum {
 342         DDI_DETACH = 0,
 343         DDI_SUSPEND = 1,
 344         DDI_PM_SUSPEND = 2,
 345         DDI_HOTPLUG_DETACH = 3          /* detach, don't try to auto-unconfig */
 346 } ddi_detach_cmd_t;
 347
 348 #define DDI_PROP_SUCCESS        0
 349
 350 #define DDI_PROP_DONTPASS   1
 351 typedef uint_t major_t;
 352 typedef uint_t minor_t;
 353
 354 typedef struct __dev_info *dev_info_t;
 355
 356 extern void ddi_report_dev(dev_info_t *);
 357 extern int ddi_soft_state_init(void **, size_t, size_t);
 358 extern void *ddi_get_soft_state(void *, int);
 359 extern int ddi_soft_state_free(void *, int);
 360 extern int ddi_soft_state_zalloc(void *, int);
 361 extern void ddi_soft_state_fini(void **);
 362
 363 int ddi_getprop(dev_t dev, dev_info_t *dip, int flags, const char *name, int defvalue);
 364
 365 extern int ddi_prop_free(void *);
 366 extern int ddi_prop_lookup_int_array(dev_t, dev_info_t *, uint_t, const char *, int **, uint_t *);
 367
 368 extern int ddi_driver_major(dev_info_t *);
 369
 370 extern int ddi_create_minor_node(dev_info_t *, const char *, int, minor_t, const char *, int);
 371 extern void ddi_remove_minor_node(dev_info_t *, char *);
 372
 373 extern major_t getemajor(dev_t);
 374 extern minor_t getminor(dev_t);
 375
 376 extern dev_t makedevice(major_t, minor_t);
 377
 378 /*
 379  * Kernel Debug Interface
 380  */
 381
 382 typedef enum kdi_dtrace_set {
 383         KDI_DTSET_DTRACE_ACTIVATE,
 384         KDI_DTSET_DTRACE_DEACTIVATE,
 385         KDI_DTSET_KMDB_BPT_ACTIVATE,
 386         KDI_DTSET_KMDB_BPT_DEACTIVATE
 387 } kdi_dtrace_set_t;
 388
 389 extern int kdi_dtrace_set(kdi_dtrace_set_t);
 390 extern void debug_enter(char *);
 391
 392 /*
 393  * DTrace specific zone allocation
 394  */
 395
 396 /*
 397  * To break dtrace memory usage out in a trackable
 398  * fashion, uncomment the #define below. This will
 399  * enable emulation of the general kalloc.XXX zones
 400  * for most dtrace allocations. (kalloc.large is not
 401  * emulated)
 402  *
 403  * #define DTRACE_MEMORY_ZONES 1
 404  *
 405  */
 406
 407 #if defined(DTRACE_MEMORY_ZONES)
 408 void dtrace_alloc_init(void);
 409 void *dtrace_alloc(vm_size_t);
 410 void dtrace_free(void *, vm_size_t);
 411 #endif
 412
 413 /*
 414  * kmem
 415  */
 416
 417 #define KM_SLEEP        0x00000000
 418 #define KM_NOSLEEP      0x00000001
 419
 420 typedef struct vmem vmem_t;
 421 typedef struct kmem_cache kmem_cache_t;
 422
 423 #define kmem_alloc dt_kmem_alloc /* Avoid clash with Darwin's kmem_alloc */
 424 #define kmem_free dt_kmem_free /* Avoid clash with Darwin's kmem_free */
 425 #define kmem_zalloc dt_kmem_zalloc /* Avoid clash with Darwin's kmem_zalloc */
 426 extern void *dt_kmem_alloc(size_t, int);
 427 extern void dt_kmem_free(void *, size_t);
 428 extern void *dt_kmem_zalloc(size_t, int);
 429
 430 extern void *dt_kmem_alloc_aligned(size_t, size_t, int);
 431 extern void *dt_kmem_zalloc_aligned(size_t, size_t, int);
 432 extern void dt_kmem_free_aligned(void*, size_t);
 433
 434 extern kmem_cache_t *
 435 kmem_cache_create(const char *, size_t, size_t, int (*)(void *, void *, int),
 436         void (*)(void *, void *), void (*)(void *), void *, vmem_t *, int);
 437 extern void *kmem_cache_alloc(kmem_cache_t *, int);
 438 extern void kmem_cache_free(kmem_cache_t *, void *);
 439 extern void kmem_cache_destroy(kmem_cache_t *);
 440
 441 /*
 442  * kthread
 443  */
 444
 445 typedef struct _kthread kthread_t; /* For dtrace_vtime_switch(), dtrace_panicked and dtrace_errthread */
 446
 447 /*
 448  * proc
 449  */
 450
 451 #define DATAMODEL_MASK  0x0FF00000
 452
 453 #define DATAMODEL_ILP32 0x00100000
 454 #define DATAMODEL_LP64  0x00200000
 455
 456 #define DATAMODEL_NONE  0
 457
 458 #if     defined(__LP64__)
 459 #define DATAMODEL_NATIVE        DATAMODEL_LP64
 460 #else
 461 #define DATAMODEL_NATIVE        DATAMODEL_ILP32
 462 #endif  /* __LP64__ */
 463
 464 typedef unsigned int model_t; /* For dtrace_instr_size_isa() prototype in <sys/dtrace.h> */
 465
 466 /*
 467  * taskq
 468  */
 469
 470 #define TQ_SLEEP        0x00    /* Can block for memory */
 471
 472 typedef uint_t pri_t;
 473 typedef struct taskq taskq_t;
 474 typedef void (task_func_t)(void *);
 475 typedef uintptr_t taskqid_t;
 476
 477 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 478 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 479 extern void     taskq_destroy(taskq_t *);
 480
 481 extern pri_t maxclsyspri;
 482
 483 /*
 484  * vmem
 485  */
 486
 487 #define VMC_IDENTIFIER  0x00040000      /* not backed by memory */
 488 #define VM_SLEEP        0x00000000      /* same as KM_SLEEP */
 489 #define VM_BESTFIT      0x00000100
 490
 491 extern void *vmem_alloc(vmem_t *, size_t, int);
 492 extern vmem_t *vmem_create(const char *, void *, size_t, size_t, void *,
 493                                         void *, vmem_t *, size_t, int);
 494 extern void vmem_destroy(vmem_t *);
 495 extern void vmem_free(vmem_t *vmp, void *vaddr, size_t size);
 496
 497 /*
 498  * Atomic
 499  */
 500
 501 static inline void atomic_add_32( uint32_t *theAddress, int32_t theAmount )
 502 {
 503         (void)OSAddAtomic( theAmount, theAddress );
 504 }
 505
 506 #if defined(__i386__) || defined(__x86_64__)
 507 static inline void atomic_add_64( uint64_t *theAddress, int64_t theAmount )
 508 {
 509         (void)OSAddAtomic64( theAmount, (SInt64 *)theAddress );
 510 }
 511 #endif
 512
 513 /*
 514  * Miscellaneous
 515  */
 516
 517 typedef uintptr_t pc_t;
 518 typedef uintptr_t greg_t; /* For dtrace_impl.h prototype of dtrace_getfp() */
 519 extern struct regs *find_user_regs( thread_t thread);
 520 extern vm_offset_t dtrace_get_cpu_int_stack_top(void);
 521 extern vm_offset_t max_valid_stack_address(void); /* kern/thread.h */
 522
 523 extern volatile int panicwait; /* kern/debug.c */
 524 #define panic_quiesce (panicwait)
 525
 526 #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 527
 528 extern void delay( int ); /* kern/clock.h */
 529
 530 extern int vuprintf(const char *, va_list);
 531
 532 extern hrtime_t dtrace_abs_to_nano(uint64_t);
 533
 534 __private_extern__ const char * strstr(const char *, const char *);
 535
 536 #undef proc_t
 537
 538 /*
 539  * Safe counted string compare against a literal string. The sizeof() intentionally
 540  * counts the trailing NUL, and so ensures that all the characters in the literal
 541  * can participate in the comparison.
 542  */
 543 #define LIT_STRNEQL(s1, lit_s2) (0 == strncmp( (s1), (lit_s2), sizeof((lit_s2)) ))
 544
 545 /*
 546  * Safe counted string compare of a literal against the beginning of a string. Here
 547  * the sizeof() is reduced by 1 so that the trailing null of the literal does not
 548  * participate in the comparison.
 549  */
 550 #define LIT_STRNSTART(s1, lit_s2) (0 == strncmp( (s1), (lit_s2), sizeof((lit_s2)) - 1 ))
 551
 552 #define KERNELBASE VM_MIN_KERNEL_ADDRESS
 553 #endif /* KERNEL_BUILD */
 554 #endif /* _DTRACE_GLUE_H */
 555