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/locks.h>
  36 #include <kern/thread_call.h>
  37 #include <kern/thread.h>
  38 #include <machine/machine_routines.h>
  39 #include <sys/syslog.h>
  40 #include <sys/ucred.h>
  41 #include <stdarg.h>
  42 #include <mach/kmod.h>
  43 #include <libkern/OSAtomic.h>
  44
  45 #if defined(__i386__) || defined(__x86_64__)
  46 #include <i386/mp.h>
  47 #endif
  48
  49 /*
  50  * cmn_err
  51  */
  52 #define CE_CONT         0       /* continuation         */
  53 #define CE_NOTE         1       /* notice               */
  54 #define CE_WARN         2       /* warning              */
  55 #define CE_PANIC        3       /* panic                */
  56 #define CE_IGNORE       4       /* print nothing        */
  57
  58 extern void cmn_err( int, const char *, ... );
  59
  60 /*
  61  * pid/proc
  62  */
  63
  64 /* Solaris proc_t is the struct. Darwin's proc_t is a pointer to it. */
  65 #define proc_t struct proc /* Steer clear of the Darwin typedef for proc_t */
  66 #define curproc ((struct proc *)current_proc()) /* Called from probe context, must blacklist */
  67
  68 proc_t* sprlock(pid_t pid);
  69 void sprunlock(proc_t *p);
  70
  71 /*
  72  * uread/uwrite
  73  */
  74
  75 int uread(proc_t *p, void *buf, user_size_t len, user_addr_t a);
  76 int uwrite(proc_t *p, void *buf, user_size_t len, user_addr_t a);
  77
  78 /*
  79  * fuword / suword
  80  */
  81
  82 int fuword8(user_addr_t, uint8_t *);
  83 int fuword16(user_addr_t, uint16_t *);
  84 int fuword32(user_addr_t, uint32_t *);
  85 int fuword64(user_addr_t, uint64_t *);
  86
  87 void fuword8_noerr(user_addr_t, uint8_t *);
  88 void fuword16_noerr(user_addr_t, uint16_t *);
  89 void fuword32_noerr(user_addr_t, uint32_t *);
  90 void fuword64_noerr(user_addr_t, uint64_t *);
  91
  92 int suword64(user_addr_t, uint64_t value);
  93 int suword32(user_addr_t, uint32_t value);
  94 int suword16(user_addr_t, uint16_t value);
  95 int suword8(user_addr_t, uint8_t value);
  96
  97 /*
  98  * cpuvar
  99  */
 100 extern lck_mtx_t cpu_lock;
 101 extern lck_mtx_t cyc_lock;
 102 extern lck_mtx_t mod_lock;
 103
 104 /*
 105  * wrap_timer_call: wrapper of timer_call for cyclic timers.
 106  */
 107 struct wrap_timer_call;
 108
 109 /*
 110  * Per-CPU data.
 111  */
 112 typedef struct dtrace_cpu {
 113         processorid_t   cpu_id;                    /* CPU number */
 114         struct dtrace_cpu *cpu_next;                 /* next existing CPU */
 115         lck_rw_t        cpu_ft_lock;               /* DTrace: fasttrap lock */
 116         uintptr_t       cpu_dtrace_caller;         /* DTrace: caller, if any */
 117         hrtime_t        cpu_dtrace_chillmark;      /* DTrace: chill mark time */
 118         hrtime_t        cpu_dtrace_chilled;        /* DTrace: total chill time */
 119         boolean_t       cpu_dtrace_invop_underway; /* DTrace gaurds against invalid op re-entrancy */
 120
 121         /* Local cyclic timers on this CPU */
 122         LIST_HEAD(cyc_list_head, wrap_timer_call) cpu_cyc_list;
 123 } dtrace_cpu_t;
 124
 125 extern dtrace_cpu_t *cpu_list;
 126
 127 /*
 128  * The cpu_core structure consists of per-CPU state available in any context.
 129  * On some architectures, this may mean that the page(s) containing the
 130  * NCPU-sized array of cpu_core structures must be locked in the TLB -- it
 131  * is up to the platform to assure that this is performed properly.  Note that
 132  * the structure is sized to avoid false sharing.
 133  */
 134 #define CPU_CACHE_COHERENCE_SIZE        64
 135
 136 typedef struct cpu_core {
 137         uint64_t        cpuc_dtrace_illval;     /* DTrace illegal value */
 138         lck_mtx_t       cpuc_pid_lock;          /* DTrace pid provider lock */
 139         uint16_t        cpuc_dtrace_flags;      /* DTrace flags */
 140         uint64_t        cpuc_missing_tos;       /* Addr. of top most stack frame if missing */
 141         uint8_t         cpuc_pad[CPU_CACHE_COHERENCE_SIZE - sizeof(uint64_t) - sizeof(lck_mtx_t) - sizeof(uint16_t) - sizeof(uint64_t) ];       /* padding */
 142 } cpu_core_t;
 143
 144 extern cpu_core_t *cpu_core;
 145
 146 extern unsigned int dtrace_max_cpus;            /* max number of enabled cpus */
 147 #define NCPU        dtrace_max_cpus
 148
 149 extern int cpu_number(void); /* From #include <kern/cpu_number.h>. Called from probe context, must blacklist. */
 150
 151 #define CPU             (&(cpu_list[cpu_number()]))     /* Pointer to current CPU */
 152 #define CPU_ON_INTR(cpup) ml_at_interrupt_context() /* always invoked on current cpu */
 153
 154 /*
 155  * Routines used to register interest in cpu's being added to or removed
 156  * from the system.
 157  */
 158 typedef enum {
 159         CPU_INIT,
 160         CPU_CONFIG,
 161         CPU_UNCONFIG,
 162         CPU_ON,
 163         CPU_OFF,
 164         CPU_CPUPART_IN,
 165         CPU_CPUPART_OUT
 166 } cpu_setup_t;
 167
 168 typedef int cpu_setup_func_t(cpu_setup_t, int, void *);
 169
 170 extern void register_cpu_setup_func(cpu_setup_func_t *, void *);
 171 extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
 172
 173 /*
 174  * CPU_DTRACE
 175  */
 176
 177 /*
 178  * DTrace flags.
 179  */
 180 #define CPU_DTRACE_NOFAULT      0x0001  /* Don't fault */
 181 #define CPU_DTRACE_DROP         0x0002  /* Drop this ECB */
 182 #define CPU_DTRACE_BADADDR      0x0004  /* DTrace fault: bad address */
 183 #define CPU_DTRACE_BADALIGN     0x0008  /* DTrace fault: bad alignment */
 184 #define CPU_DTRACE_DIVZERO      0x0010  /* DTrace fault: divide by zero */
 185 #define CPU_DTRACE_ILLOP        0x0020  /* DTrace fault: illegal operation */
 186 #define CPU_DTRACE_NOSCRATCH    0x0040  /* DTrace fault: out of scratch */
 187 #define CPU_DTRACE_KPRIV        0x0080  /* DTrace fault: bad kernel access */
 188 #define CPU_DTRACE_UPRIV        0x0100  /* DTrace fault: bad user access */
 189 #define CPU_DTRACE_TUPOFLOW     0x0200  /* DTrace fault: tuple stack overflow */
 190 #define CPU_DTRACE_USTACK_FP    0x0400  /* pid provider hint to ustack() */
 191 #define CPU_DTRACE_ENTRY        0x0800  /* pid provider hint to ustack() */
 192 #define CPU_DTRACE_BADSTACK 0x1000  /* DTrace fault: bad stack */
 193
 194 #define CPU_DTRACE_FAULT        (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \
 195                                 CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \
 196                                 CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \
 197                                 CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \
 198                                 CPU_DTRACE_BADSTACK)
 199 #define CPU_DTRACE_ERROR        (CPU_DTRACE_FAULT | CPU_DTRACE_DROP)
 200
 201 /*
 202  * Loadable Modules
 203  */
 204
 205 /* Keep the compiler happy */
 206 struct dtrace_module_symbols;
 207
 208 /* Solaris' modctl structure, greatly simplified, shadowing parts of xnu kmod structure. */
 209 typedef struct modctl {
 210         struct modctl   *mod_next;
 211         struct modctl   *mod_stale;     // stale module chain
 212         uint32_t        mod_id;         // the kext unique identifier
 213         char            mod_modname[KMOD_MAX_NAME];
 214         int             mod_loadcnt;
 215         char            mod_loaded;
 216         uint16_t        mod_flags;      // See flags below
 217         int             mod_nenabled;   // # of enabled DTrace probes in module
 218         vm_address_t    mod_address;    // starting address (of Mach-o header blob)
 219         vm_size_t       mod_size;       // total size (of blob)
 220         UUID            mod_uuid;
 221         struct dtrace_module_symbols* mod_user_symbols;
 222 } modctl_t;
 223
 224 /* Definitions for mod_flags */
 225 #define MODCTL_IS_MACH_KERNEL                   0x01  // This module represents /mach_kernel
 226 #define MODCTL_HAS_KERNEL_SYMBOLS               0x02  // Kernel symbols (nlist) are available
 227 #define MODCTL_FBT_PROBES_PROVIDED              0x04  // fbt probes have been provided
 228 #define MODCTL_FBT_INVALID                      0x08  // Module is invalid for fbt probes
 229 #define MODCTL_SDT_PROBES_PROVIDED              0x10  // sdt probes have been provided
 230 #define MODCTL_SDT_INVALID                      0x20  // Module is invalid for sdt probes
 231 #define MODCTL_HAS_UUID                         0x40  // Module has UUID
 232 #define MODCTL_FBT_PRIVATE_PROBES_PROVIDED      0x80  // fbt private probes have been provided
 233 #define MODCTL_FBT_PROVIDE_PRIVATE_PROBES       0x100 // fbt provider must provide private probes
 234
 235 /* Simple/singular mod_flags accessors */
 236 #define MOD_IS_MACH_KERNEL(mod)                 (mod->mod_flags & MODCTL_IS_MACH_KERNEL)
 237 #define MOD_HAS_KERNEL_SYMBOLS(mod)             (mod->mod_flags & MODCTL_HAS_KERNEL_SYMBOLS)
 238 #define MOD_HAS_USERSPACE_SYMBOLS(mod)          (mod->mod_user_symbols) /* No point in duplicating state in the flags bits */
 239 #define MOD_FBT_PROBES_PROVIDED(mod)            (mod->mod_flags & MODCTL_FBT_PROBES_PROVIDED)
 240 #define MOD_FBT_INVALID(mod)                    (mod->mod_flags & MODCTL_FBT_INVALID)
 241 #define MOD_SDT_PROBES_PROVIDED(mod)            (mod->mod_flags & MODCTL_SDT_PROBES_PROVIDED)
 242 #define MOD_SDT_INVALID(mod)                    (mod->mod_flags & MODCTL_SDT_INVALID)
 243 #define MOD_HAS_UUID(mod)                       (mod->mod_flags & MODCTL_HAS_UUID)
 244 #define MOD_FBT_PRIVATE_PROBES_PROVIDED(mod)    (mod->mod_flags & MODCTL_FBT_PRIVATE_PROBES_PROVIDED)
 245 #define MOD_FBT_PROVIDE_PRIVATE_PROBES(mod)     (mod->mod_flags & MODCTL_FBT_PROVIDE_PRIVATE_PROBES)
 246
 247 /* Compound accessors */
 248 #define MOD_FBT_PRIVATE_PROBES_DONE(mod)        (MOD_FBT_PRIVATE_PROBES_PROVIDED(mod) || !MOD_FBT_PROVIDE_PRIVATE_PROBES(mod))
 249 #define MOD_FBT_DONE(mod)                       ((MOD_FBT_PROBES_PROVIDED(mod) && MOD_FBT_PRIVATE_PROBES_DONE(mod)) || MOD_FBT_INVALID(mod))
 250 #define MOD_SDT_DONE(mod)                       (MOD_SDT_PROBES_PROVIDED(mod) || MOD_SDT_INVALID(mod))
 251 #define MOD_SYMBOLS_DONE(mod)                   (MOD_FBT_DONE(mod) && MOD_SDT_DONE(mod))
 252
 253 extern modctl_t *dtrace_modctl_list;
 254
 255 /*
 256  * cred_t
 257  */
 258 /* Privileges */
 259 #define PRIV_DTRACE_KERNEL        3
 260 #define PRIV_DTRACE_PROC          4
 261 #define PRIV_DTRACE_USER          5
 262 #define PRIV_PROC_OWNER          30
 263 #define PRIV_PROC_ZONE           35
 264 #define PRIV_ALL                        (-1)    /* All privileges required */
 265
 266 /* Privilege sets */
 267 #define PRIV_EFFECTIVE            0
 268
 269 typedef struct ucred cred_t;
 270 #define cr_suid cr_svuid
 271 #define cr_sgid cr_svgid
 272
 273 extern cred_t *dtrace_CRED(void); /* Safe to call from probe context. */
 274 #define CRED() kauth_cred_get() /* Can't be called from probe context! */
 275 extern int PRIV_POLICY_CHOICE(void *, int, int);
 276 extern int PRIV_POLICY_ONLY(void *, int, int);
 277 extern gid_t crgetgid(const cred_t *);
 278 extern uid_t crgetuid(const cred_t *);
 279 #define crgetzoneid(x) ((zoneid_t)0)
 280
 281 #define crhold(a) {}
 282 #define crfree(a) {}
 283
 284 /*
 285  * "cyclic"
 286  */
 287 #define CY_LOW_LEVEL            0
 288 #define CY_LOCK_LEVEL           1
 289 #define CY_HIGH_LEVEL           2
 290 #define CY_SOFT_LEVELS          2
 291 #define CY_LEVELS                       3
 292
 293 typedef uintptr_t cyclic_id_t;
 294 typedef cyclic_id_t *cyclic_id_list_t;
 295 typedef uint16_t cyc_level_t;
 296 typedef void (*cyc_func_t)(void *);
 297
 298 #define CYCLIC_NONE             ((cyclic_id_t)0)
 299
 300 typedef struct cyc_time {
 301         hrtime_t cyt_when;
 302         hrtime_t cyt_interval;
 303 } cyc_time_t;
 304
 305 typedef struct cyc_handler {
 306         cyc_func_t cyh_func;
 307         void *cyh_arg;
 308         cyc_level_t cyh_level;
 309 } cyc_handler_t;
 310
 311 typedef struct cyc_omni_handler {
 312         void (*cyo_online)(void *, dtrace_cpu_t *, cyc_handler_t *, cyc_time_t *);
 313         void (*cyo_offline)(void *, dtrace_cpu_t *, void *);
 314         void *cyo_arg;
 315 } cyc_omni_handler_t;
 316
 317 extern void dtrace_install_cpu_hooks(void);
 318
 319 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
 320 extern void cyclic_remove(cyclic_id_t);
 321
 322 extern cyclic_id_list_t cyclic_add_omni(cyc_omni_handler_t *);
 323 extern void cyclic_remove_omni(cyclic_id_list_t);
 324
 325 extern cyclic_id_t cyclic_timer_add(cyc_handler_t *, cyc_time_t *);
 326 extern void cyclic_timer_remove(cyclic_id_t);
 327
 328 /*
 329  * timeout / untimeout (converted to dtrace_timeout / dtrace_untimeout due to name collision)
 330  */
 331
 332 thread_call_t dtrace_timeout(void (*func)(void *, void *), void* arg, uint64_t nanos);
 333
 334 /*
 335  * ddi
 336  */
 337
 338 #define DDI_SUCCESS                     0
 339 #define DDI_FAILURE                     -1
 340
 341 #define DDI_DEV_T_NONE  ((dev_t)-1)
 342 #define DDI_DEV_T_ANY   ((dev_t)-2)
 343 #define DDI_MAJOR_T_UNKNOWN     ((major_t)0)
 344
 345 #define DDI_PSEUDO "ddi_pseudo"
 346
 347 typedef enum {
 348         DDI_ATTACH = 0,
 349         DDI_RESUME = 1,
 350         DDI_PM_RESUME = 2
 351 } ddi_attach_cmd_t;
 352
 353 typedef enum {
 354         DDI_DETACH = 0,
 355         DDI_SUSPEND = 1,
 356         DDI_PM_SUSPEND = 2,
 357         DDI_HOTPLUG_DETACH = 3          /* detach, don't try to auto-unconfig */
 358 } ddi_detach_cmd_t;
 359
 360 #define DDI_PROP_SUCCESS        0
 361
 362 #define DDI_PROP_DONTPASS   1
 363 typedef uint_t major_t;
 364 typedef uint_t minor_t;
 365
 366 typedef struct __dev_info *dev_info_t;
 367
 368 extern void ddi_report_dev(dev_info_t *);
 369
 370 int ddi_getprop(dev_t dev, dev_info_t *dip, int flags, const char *name, int defvalue);
 371
 372 extern int ddi_prop_free(void *);
 373 extern int ddi_prop_lookup_int_array(dev_t, dev_info_t *, uint_t, const char *, int **, uint_t *);
 374
 375 extern int ddi_driver_major(dev_info_t *);
 376
 377 extern int ddi_create_minor_node(dev_info_t *, const char *, int, minor_t, const char *, int);
 378 extern void ddi_remove_minor_node(dev_info_t *, char *);
 379
 380 extern major_t getemajor(dev_t);
 381 extern minor_t getminor(dev_t);
 382
 383 extern dev_t makedevice(major_t, minor_t);
 384
 385 /*
 386  * Kernel Debug Interface
 387  */
 388
 389 typedef enum kdi_dtrace_set {
 390         KDI_DTSET_DTRACE_ACTIVATE,
 391         KDI_DTSET_DTRACE_DEACTIVATE,
 392         KDI_DTSET_KMDB_BPT_ACTIVATE,
 393         KDI_DTSET_KMDB_BPT_DEACTIVATE
 394 } kdi_dtrace_set_t;
 395
 396 extern int kdi_dtrace_set(kdi_dtrace_set_t);
 397 extern void debug_enter(char *);
 398
 399 /*
 400  * DTrace specific zone allocation
 401  */
 402
 403 /*
 404  * To break dtrace memory usage out in a trackable
 405  * fashion, uncomment the #define below. This will
 406  * enable emulation of the general kalloc.XXX zones
 407  * for most dtrace allocations. (kalloc.large is not
 408  * emulated)
 409  *
 410  * #define DTRACE_MEMORY_ZONES 1
 411  *
 412  */
 413
 414 #if defined(DTRACE_MEMORY_ZONES)
 415 void dtrace_alloc_init(void);
 416 void *dtrace_alloc(vm_size_t);
 417 void dtrace_free(void *, vm_size_t);
 418 #endif
 419
 420 /*
 421  * kmem
 422  */
 423
 424 #define KM_SLEEP        0x00000000
 425 #define KM_NOSLEEP      0x00000001
 426
 427 typedef struct vmem vmem_t;
 428 typedef struct kmem_cache kmem_cache_t;
 429
 430 #define kmem_alloc dt_kmem_alloc /* Avoid clash with Darwin's kmem_alloc */
 431 #define kmem_free dt_kmem_free /* Avoid clash with Darwin's kmem_free */
 432 #define kmem_zalloc dt_kmem_zalloc /* Avoid clash with Darwin's kmem_zalloc */
 433 extern void *dt_kmem_alloc(size_t, int);
 434 extern void dt_kmem_free(void *, size_t);
 435 extern void *dt_kmem_zalloc(size_t, int);
 436
 437 extern void *dt_kmem_alloc_aligned(size_t, size_t, int);
 438 extern void *dt_kmem_zalloc_aligned(size_t, size_t, int);
 439 extern void dt_kmem_free_aligned(void*, size_t);
 440
 441 extern kmem_cache_t *
 442 kmem_cache_create(const char *, size_t, size_t, int (*)(void *, void *, int),
 443         void (*)(void *, void *), void (*)(void *), void *, vmem_t *, int);
 444 extern void *kmem_cache_alloc(kmem_cache_t *, int);
 445 extern void kmem_cache_free(kmem_cache_t *, void *);
 446 extern void kmem_cache_destroy(kmem_cache_t *);
 447
 448 /*
 449  * kthread
 450  */
 451
 452 typedef struct _kthread kthread_t; /* For dtrace_vtime_switch(), dtrace_panicked and dtrace_errthread */
 453
 454 /*
 455  * proc
 456  */
 457
 458 #define DATAMODEL_MASK  0x0FF00000
 459
 460 #define DATAMODEL_ILP32 0x00100000
 461 #define DATAMODEL_LP64  0x00200000
 462
 463 #define DATAMODEL_NONE  0
 464
 465 #if     defined(__LP64__)
 466 #define DATAMODEL_NATIVE        DATAMODEL_LP64
 467 #else
 468 #define DATAMODEL_NATIVE        DATAMODEL_ILP32
 469 #endif  /* __LP64__ */
 470
 471 typedef unsigned int model_t; /* For dtrace_instr_size_isa() prototype in <sys/dtrace.h> */
 472
 473 /*
 474  * taskq
 475  */
 476
 477 #define TQ_SLEEP        0x00    /* Can block for memory */
 478
 479 typedef uint_t pri_t;
 480 typedef struct taskq taskq_t;
 481 typedef void (task_func_t)(void *);
 482 typedef uintptr_t taskqid_t;
 483
 484 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 485 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 486 extern void     taskq_destroy(taskq_t *);
 487
 488 extern pri_t maxclsyspri;
 489
 490 /*
 491  * vmem
 492  */
 493
 494 #define VMC_IDENTIFIER  0x00040000      /* not backed by memory */
 495 #define VM_SLEEP        0x00000000      /* same as KM_SLEEP */
 496 #define VM_BESTFIT      0x00000100
 497
 498 extern void *vmem_alloc(vmem_t *, size_t, int);
 499 extern vmem_t *vmem_create(const char *, void *, size_t, size_t, void *,
 500                                         void *, vmem_t *, size_t, int);
 501 extern void vmem_destroy(vmem_t *);
 502 extern void vmem_free(vmem_t *vmp, void *vaddr, size_t size);
 503
 504 /*
 505  * Atomic
 506  */
 507
 508 static inline uint32_t atomic_add_32( uint32_t *theAddress, int32_t theAmount )
 509 {
 510         return OSAddAtomic( theAmount, theAddress );
 511 }
 512
 513 #if defined(__i386__) || defined(__x86_64__)
 514 static inline void atomic_add_64( uint64_t *theAddress, int64_t theAmount )
 515 {
 516         (void)OSAddAtomic64( theAmount, (SInt64 *)theAddress );
 517 }
 518 #endif
 519
 520 static inline uint32_t atomic_and_32(uint32_t *addr, uint32_t mask)
 521 {
 522         return OSBitAndAtomic(mask, addr);
 523 }
 524
 525 static inline uint32_t atomic_or_32(uint32_t *addr, uint32_t mask)
 526 {
 527         return OSBitOrAtomic(mask, addr);
 528 }
 529
 530
 531 /*
 532  * Miscellaneous
 533  */
 534
 535 typedef uintptr_t pc_t;
 536 typedef uintptr_t greg_t; /* For dtrace_impl.h prototype of dtrace_getfp() */
 537 extern struct regs *find_user_regs( thread_t thread);
 538 extern vm_offset_t dtrace_get_cpu_int_stack_top(void);
 539 extern vm_offset_t max_valid_stack_address(void); /* kern/thread.h */
 540
 541 extern volatile int panicwait; /* kern/debug.c */
 542 #define panic_quiesce (panicwait)
 543
 544 #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 545
 546 extern int vuprintf(const char *, va_list);
 547
 548 extern hrtime_t dtrace_abs_to_nano(uint64_t);
 549
 550 __private_extern__ const char * strstr(const char *, const char *);
 551
 552 #define DTRACE_NCLIENTS 32
 553
 554 #undef proc_t
 555
 556 /*
 557  * Safe counted string compare against a literal string. The sizeof() intentionally
 558  * counts the trailing NUL, and so ensures that all the characters in the literal
 559  * can participate in the comparison.
 560  */
 561 #define LIT_STRNEQL(s1, lit_s2) (0 == strncmp( (s1), (lit_s2), sizeof((lit_s2)) ))
 562
 563 /*
 564  * Safe counted string compare of a literal against the beginning of a string. Here
 565  * the sizeof() is reduced by 1 so that the trailing null of the literal does not
 566  * participate in the comparison.
 567  */
 568 #define LIT_STRNSTART(s1, lit_s2) (0 == strncmp( (s1), (lit_s2), sizeof((lit_s2)) - 1 ))
 569
 570 #define KERNELBASE VM_MIN_KERNEL_ADDRESS
 571 #endif /* KERNEL_BUILD */
 572 #endif /* _DTRACE_GLUE_H */
 573