sys/kern/subr_csan.c

   1 /*      $NetBSD: subr_csan.c,v 1.5 2019/11/15 08:11:37 maxv Exp $       */
   2
   3 /*
   4  * Copyright (c) 2019 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  * Copyright (c) 2019 Andrew Turner
   7  *
   8  * This code is derived from software contributed to The NetBSD Foundation
   9  * by Maxime Villard.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #define KCSAN_RUNTIME
  34
  35 #include "opt_ddb.h"
  36
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD$");
  39
  40 #include <sys/param.h>
  41 #include <sys/kernel.h>
  42 #include <sys/bus.h>
  43 #include <sys/conf.h>
  44 #include <sys/cpu.h>
  45 #include <sys/csan.h>
  46 #include <sys/proc.h>
  47 #include <sys/smp.h>
  48 #include <sys/systm.h>
  49
  50 #include <ddb/ddb.h>
  51 #include <ddb/db_sym.h>
  52
  53 #ifdef KCSAN_PANIC
  54 #define REPORT panic
  55 #else
  56 #define REPORT printf
  57 #endif
  58
  59 typedef struct {
  60         uintptr_t addr;
  61         uint32_t size;
  62         bool write:1;
  63         bool atomic:1;
  64         uintptr_t pc;
  65 } csan_cell_t;
  66
  67 typedef struct {
  68         bool inited;
  69         uint32_t cnt;
  70         csan_cell_t cell;
  71 } csan_cpu_t;
  72
  73 static csan_cpu_t kcsan_cpus[MAXCPU];
  74 static bool kcsan_enabled __read_mostly;
  75
  76 #define __RET_ADDR      (uintptr_t)__builtin_return_address(0)
  77
  78 #define KCSAN_NACCESSES 1024
  79 #define KCSAN_DELAY     10      /* 10 microseconds */
  80
  81 /* -------------------------------------------------------------------------- */
  82
  83 /* The MD code. */
  84 #include <machine/csan.h>
  85
  86 /* -------------------------------------------------------------------------- */
  87
  88 static void
  89 kcsan_enable(void *dummy __unused)
  90 {
  91
  92         printf("Enabling KCSCAN, expect reduced performance.\n");
  93         kcsan_enabled = true;
  94 }
  95 SYSINIT(kcsan_enable, SI_SUB_SMP, SI_ORDER_SECOND, kcsan_enable, NULL);
  96
  97 void
  98 kcsan_cpu_init(u_int cpu)
  99 {
 100         kcsan_cpus[cpu].inited = true;
 101 }
 102
 103 /* -------------------------------------------------------------------------- */
 104
 105 static inline void
 106 kcsan_report(csan_cell_t *new, u_int newcpu, csan_cell_t *old, u_int oldcpu)
 107 {
 108         const char *newsym, *oldsym;
 109 #ifdef DDB
 110         c_db_sym_t sym;
 111         db_expr_t offset;
 112
 113         sym = db_search_symbol((vm_offset_t)new->pc, DB_STGY_PROC, &offset);
 114         db_symbol_values(sym, &newsym, NULL);
 115
 116         sym = db_search_symbol((vm_offset_t)old->pc, DB_STGY_PROC, &offset);
 117         db_symbol_values(sym, &oldsym, NULL);
 118 #else
 119         newsym = "";
 120         oldsym = "";
 121 #endif
 122         REPORT("CSan: Racy Access "
 123             "[Cpu%u %s%s Addr=%p Size=%u PC=%p<%s>] "
 124             "[Cpu%u %s%s Addr=%p Size=%u PC=%p<%s>]\n",
 125             newcpu,
 126             (new->atomic ? "Atomic " : ""), (new->write ? "Write" : "Read"),
 127             (void *)new->addr, new->size, (void *)new->pc, newsym,
 128             oldcpu,
 129             (old->atomic ? "Atomic " : ""), (old->write ? "Write" : "Read"),
 130             (void *)old->addr, old->size, (void *)old->pc, oldsym);
 131         kcsan_md_unwind();
 132 }
 133
 134 static inline bool
 135 kcsan_access_is_atomic(csan_cell_t *new, csan_cell_t *old)
 136 {
 137         if (new->write && !new->atomic)
 138                 return false;
 139         if (old->write && !old->atomic)
 140                 return false;
 141         return true;
 142 }
 143
 144 static inline void
 145 kcsan_access(uintptr_t addr, size_t size, bool write, bool atomic, uintptr_t pc)
 146 {
 147         csan_cell_t old, new;
 148         csan_cpu_t *cpu;
 149         uint64_t intr;
 150         size_t i;
 151
 152         if (__predict_false(!kcsan_enabled))
 153                 return;
 154         if (__predict_false(kcsan_md_unsupported((vm_offset_t)addr)))
 155                 return;
 156         if (KERNEL_PANICKED())
 157                 return;
 158
 159         new.addr = addr;
 160         new.size = size;
 161         new.write = write;
 162         new.atomic = atomic;
 163         new.pc = pc;
 164
 165         CPU_FOREACH(i) {
 166                 __builtin_memcpy(&old, &kcsan_cpus[i].cell, sizeof(old));
 167
 168                 if (old.addr + old.size <= new.addr)
 169                         continue;
 170                 if (new.addr + new.size <= old.addr)
 171                         continue;
 172                 if (__predict_true(!old.write && !new.write))
 173                         continue;
 174                 if (__predict_true(kcsan_access_is_atomic(&new, &old)))
 175                         continue;
 176
 177                 kcsan_report(&new, PCPU_GET(cpuid), &old, i);
 178                 break;
 179         }
 180
 181         if (__predict_false(!kcsan_md_is_avail()))
 182                 return;
 183
 184         kcsan_md_disable_intrs(&intr);
 185
 186         cpu = &kcsan_cpus[PCPU_GET(cpuid)];
 187         if (__predict_false(!cpu->inited))
 188                 goto out;
 189         cpu->cnt = (cpu->cnt + 1) % KCSAN_NACCESSES;
 190         if (__predict_true(cpu->cnt != 0))
 191                 goto out;
 192
 193         __builtin_memcpy(&cpu->cell, &new, sizeof(new));
 194         kcsan_md_delay(KCSAN_DELAY);
 195         __builtin_memset(&cpu->cell, 0, sizeof(new));
 196
 197 out:
 198         kcsan_md_enable_intrs(&intr);
 199 }
 200
 201 #define CSAN_READ(size)                                                 \
 202         void __tsan_read##size(uintptr_t);                              \
 203         void __tsan_read##size(uintptr_t addr)                          \
 204         {                                                               \
 205                 kcsan_access(addr, size, false, false, __RET_ADDR);     \
 206         }                                                               \
 207         void __tsan_unaligned_read##size(uintptr_t);                    \
 208         void __tsan_unaligned_read##size(uintptr_t addr)                \
 209         {                                                               \
 210                 kcsan_access(addr, size, false, false, __RET_ADDR);     \
 211         }
 212
 213 CSAN_READ(1)
 214 CSAN_READ(2)
 215 CSAN_READ(4)
 216 CSAN_READ(8)
 217 CSAN_READ(16)
 218
 219 #define CSAN_WRITE(size)                                                \
 220         void __tsan_write##size(uintptr_t);                             \
 221         void __tsan_write##size(uintptr_t addr)                         \
 222         {                                                               \
 223                 kcsan_access(addr, size, true, false, __RET_ADDR);      \
 224         }                                                               \
 225         void __tsan_unaligned_write##size(uintptr_t);                   \
 226         void __tsan_unaligned_write##size(uintptr_t addr)               \
 227         {                                                               \
 228                 kcsan_access(addr, size, true, false, __RET_ADDR);      \
 229         }
 230
 231 CSAN_WRITE(1)
 232 CSAN_WRITE(2)
 233 CSAN_WRITE(4)
 234 CSAN_WRITE(8)
 235 CSAN_WRITE(16)
 236
 237 void __tsan_read_range(uintptr_t, size_t);
 238 void __tsan_write_range(uintptr_t, size_t);
 239
 240 void
 241 __tsan_read_range(uintptr_t addr, size_t size)
 242 {
 243         kcsan_access(addr, size, false, false, __RET_ADDR);
 244 }
 245
 246 void
 247 __tsan_write_range(uintptr_t addr, size_t size)
 248 {
 249         kcsan_access(addr, size, true, false, __RET_ADDR);
 250 }
 251
 252 void __tsan_init(void);
 253 void __tsan_func_entry(void *);
 254 void __tsan_func_exit(void);
 255
 256 void
 257 __tsan_init(void)
 258 {
 259 }
 260
 261 void
 262 __tsan_func_entry(void *call_pc)
 263 {
 264 }
 265
 266 void
 267 __tsan_func_exit(void)
 268 {
 269 }
 270
 271 /* -------------------------------------------------------------------------- */
 272
 273 void *
 274 kcsan_memcpy(void *dst, const void *src, size_t len)
 275 {
 276         kcsan_access((uintptr_t)src, len, false, false, __RET_ADDR);
 277         kcsan_access((uintptr_t)dst, len, true, false, __RET_ADDR);
 278         return __builtin_memcpy(dst, src, len);
 279 }
 280
 281 int
 282 kcsan_memcmp(const void *b1, const void *b2, size_t len)
 283 {
 284         kcsan_access((uintptr_t)b1, len, false, false, __RET_ADDR);
 285         kcsan_access((uintptr_t)b2, len, false, false, __RET_ADDR);
 286         return __builtin_memcmp(b1, b2, len);
 287 }
 288
 289 void *
 290 kcsan_memset(void *b, int c, size_t len)
 291 {
 292         kcsan_access((uintptr_t)b, len, true, false, __RET_ADDR);
 293         return __builtin_memset(b, c, len);
 294 }
 295
 296 void *
 297 kcsan_memmove(void *dst, const void *src, size_t len)
 298 {
 299         kcsan_access((uintptr_t)src, len, false, false, __RET_ADDR);
 300         kcsan_access((uintptr_t)dst, len, true, false, __RET_ADDR);
 301         return __builtin_memmove(dst, src, len);
 302 }
 303
 304 char *
 305 kcsan_strcpy(char *dst, const char *src)
 306 {
 307         char *save = dst;
 308
 309         while (1) {
 310                 kcsan_access((uintptr_t)src, 1, false, false, __RET_ADDR);
 311                 kcsan_access((uintptr_t)dst, 1, true, false, __RET_ADDR);
 312                 *dst = *src;
 313                 if (*src == '\0')
 314                         break;
 315                 src++, dst++;
 316         }
 317
 318         return save;
 319 }
 320
 321 int
 322 kcsan_strcmp(const char *s1, const char *s2)
 323 {
 324         while (1) {
 325                 kcsan_access((uintptr_t)s1, 1, false, false, __RET_ADDR);
 326                 kcsan_access((uintptr_t)s2, 1, false, false, __RET_ADDR);
 327                 if (*s1 != *s2)
 328                         break;
 329                 if (*s1 == '\0')
 330                         return 0;
 331                 s1++, s2++;
 332         }
 333
 334         return (*(const unsigned char *)s1 - *(const unsigned char *)s2);
 335 }
 336
 337 size_t
 338 kcsan_strlen(const char *str)
 339 {
 340         const char *s;
 341
 342         s = str;
 343         while (1) {
 344                 kcsan_access((uintptr_t)s, 1, false, false, __RET_ADDR);
 345                 if (*s == '\0')
 346                         break;
 347                 s++;
 348         }
 349
 350         return (s - str);
 351 }
 352
 353 #undef copystr
 354 #undef copyin
 355 #undef copyin_nofault
 356 #undef copyinstr
 357 #undef copyout
 358 #undef copyout_nofault
 359
 360 int
 361 kcsan_copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done)
 362 {
 363         kcsan_access((uintptr_t)kdaddr, len, true, false, __RET_ADDR);
 364         return copystr(kfaddr, kdaddr, len, done);
 365 }
 366
 367 int
 368 kcsan_copyin(const void *uaddr, void *kaddr, size_t len)
 369 {
 370         kcsan_access((uintptr_t)kaddr, len, true, false, __RET_ADDR);
 371         return copyin(uaddr, kaddr, len);
 372 }
 373
 374 int
 375 kcsan_copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done)
 376 {
 377         kcsan_access((uintptr_t)kaddr, len, true, false, __RET_ADDR);
 378         return copyinstr(uaddr, kaddr, len, done);
 379 }
 380
 381 int
 382 kcsan_copyout(const void *kaddr, void *uaddr, size_t len)
 383 {
 384         kcsan_access((uintptr_t)kaddr, len, false, false, __RET_ADDR);
 385         return copyout(kaddr, uaddr, len);
 386 }
 387
 388 /* -------------------------------------------------------------------------- */
 389
 390 #include <machine/atomic.h>
 391 #include <sys/_cscan_atomic.h>
 392
 393 #define _CSAN_ATOMIC_FUNC_ADD(name, type)                               \
 394         void kcsan_atomic_add_##name(volatile type *ptr, type val)      \
 395         {                                                               \
 396                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 397                     __RET_ADDR);                                        \
 398                 atomic_add_##name(ptr, val);                            \
 399         }
 400
 401 #define CSAN_ATOMIC_FUNC_ADD(name, type)                                \
 402         _CSAN_ATOMIC_FUNC_ADD(name, type)                               \
 403         _CSAN_ATOMIC_FUNC_ADD(acq_##name, type)                         \
 404         _CSAN_ATOMIC_FUNC_ADD(rel_##name, type)
 405
 406 #define _CSAN_ATOMIC_FUNC_CLEAR(name, type)                             \
 407         void kcsan_atomic_clear_##name(volatile type *ptr, type val)    \
 408         {                                                               \
 409                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 410                     __RET_ADDR);                                        \
 411                 atomic_clear_##name(ptr, val);                          \
 412         }
 413
 414 #define CSAN_ATOMIC_FUNC_CLEAR(name, type)                              \
 415         _CSAN_ATOMIC_FUNC_CLEAR(name, type)                             \
 416         _CSAN_ATOMIC_FUNC_CLEAR(acq_##name, type)                       \
 417         _CSAN_ATOMIC_FUNC_CLEAR(rel_##name, type)
 418
 419 #define _CSAN_ATOMIC_FUNC_CMPSET(name, type)                            \
 420         int kcsan_atomic_cmpset_##name(volatile type *ptr, type val1,   \
 421             type val2)                                                  \
 422         {                                                               \
 423                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 424                     __RET_ADDR);                                        \
 425                 return (atomic_cmpset_##name(ptr, val1, val2));         \
 426         }
 427
 428 #define CSAN_ATOMIC_FUNC_CMPSET(name, type)                             \
 429         _CSAN_ATOMIC_FUNC_CMPSET(name, type)                            \
 430         _CSAN_ATOMIC_FUNC_CMPSET(acq_##name, type)                      \
 431         _CSAN_ATOMIC_FUNC_CMPSET(rel_##name, type)
 432
 433 #define _CSAN_ATOMIC_FUNC_FCMPSET(name, type)                           \
 434         int kcsan_atomic_fcmpset_##name(volatile type *ptr, type *val1, \
 435             type val2)                                                  \
 436         {                                                               \
 437                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 438                     __RET_ADDR);                                        \
 439                 return (atomic_fcmpset_##name(ptr, val1, val2));        \
 440         }
 441
 442 #define CSAN_ATOMIC_FUNC_FCMPSET(name, type)                            \
 443         _CSAN_ATOMIC_FUNC_FCMPSET(name, type)                           \
 444         _CSAN_ATOMIC_FUNC_FCMPSET(acq_##name, type)                     \
 445         _CSAN_ATOMIC_FUNC_FCMPSET(rel_##name, type)
 446
 447 #define CSAN_ATOMIC_FUNC_FETCHADD(name, type)                           \
 448         type kcsan_atomic_fetchadd_##name(volatile type *ptr, type val) \
 449         {                                                               \
 450                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 451                     __RET_ADDR);                                        \
 452                 return (atomic_fetchadd_##name(ptr, val));              \
 453         }
 454
 455 #define _CSAN_ATOMIC_FUNC_LOAD(name, type)                              \
 456         type kcsan_atomic_load_##name(volatile type *ptr)               \
 457         {                                                               \
 458                 kcsan_access((uintptr_t)ptr, sizeof(type), false, true, \
 459                     __RET_ADDR);                                        \
 460                 return (atomic_load_##name(ptr));                       \
 461         }
 462
 463 #define CSAN_ATOMIC_FUNC_LOAD(name, type)                               \
 464         _CSAN_ATOMIC_FUNC_LOAD(name, type)                              \
 465         _CSAN_ATOMIC_FUNC_LOAD(acq_##name, type)                        \
 466
 467 #define CSAN_ATOMIC_FUNC_READANDCLEAR(name, type)                       \
 468         type kcsan_atomic_readandclear_##name(volatile type *ptr)       \
 469         {                                                               \
 470                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 471                     __RET_ADDR);                                        \
 472                 return (atomic_readandclear_##name(ptr));               \
 473         }
 474
 475 #define _CSAN_ATOMIC_FUNC_SET(name, type)                               \
 476         void kcsan_atomic_set_##name(volatile type *ptr, type val)      \
 477         {                                                               \
 478                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 479                     __RET_ADDR);                                        \
 480                 atomic_set_##name(ptr, val);                            \
 481         }
 482
 483 #define CSAN_ATOMIC_FUNC_SET(name, type)                                \
 484         _CSAN_ATOMIC_FUNC_SET(name, type)                               \
 485         _CSAN_ATOMIC_FUNC_SET(acq_##name, type)                         \
 486         _CSAN_ATOMIC_FUNC_SET(rel_##name, type)
 487
 488 #define _CSAN_ATOMIC_FUNC_SUBTRACT(name, type)                          \
 489         void kcsan_atomic_subtract_##name(volatile type *ptr, type val) \
 490         {                                                               \
 491                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 492                     __RET_ADDR);                                        \
 493                 atomic_subtract_##name(ptr, val);                       \
 494         }
 495
 496 #define CSAN_ATOMIC_FUNC_SUBTRACT(name, type)                           \
 497         _CSAN_ATOMIC_FUNC_SUBTRACT(name, type)                          \
 498         _CSAN_ATOMIC_FUNC_SUBTRACT(acq_##name, type)                    \
 499         _CSAN_ATOMIC_FUNC_SUBTRACT(rel_##name, type)
 500
 501 #define _CSAN_ATOMIC_FUNC_STORE(name, type)                             \
 502         void kcsan_atomic_store_##name(volatile type *ptr, type val)    \
 503         {                                                               \
 504                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 505                     __RET_ADDR);                                        \
 506                 atomic_store_##name(ptr, val);                          \
 507         }
 508
 509 #define CSAN_ATOMIC_FUNC_STORE(name, type)                              \
 510         _CSAN_ATOMIC_FUNC_STORE(name, type)                             \
 511         _CSAN_ATOMIC_FUNC_STORE(rel_##name, type)
 512
 513 #define CSAN_ATOMIC_FUNC_SWAP(name, type)                               \
 514         type kcsan_atomic_swap_##name(volatile type *ptr, type val)     \
 515         {                                                               \
 516                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 517                     __RET_ADDR);                                        \
 518                 return(atomic_swap_##name(ptr, val));                   \
 519         }
 520
 521 #define CSAN_ATOMIC_FUNC_TESTANDCLEAR(name, type)                       \
 522         int kcsan_atomic_testandclear_##name(volatile type *ptr, u_int val) \
 523         {                                                               \
 524                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 525                     __RET_ADDR);                                        \
 526                 return(atomic_testandclear_##name(ptr, val));           \
 527         }
 528
 529 #define CSAN_ATOMIC_FUNC_TESTANDSET(name, type)                         \
 530         int kcsan_atomic_testandset_##name(volatile type *ptr, u_int val) \
 531         {                                                               \
 532                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 533                     __RET_ADDR);                                        \
 534                 return (atomic_testandset_##name(ptr, val));            \
 535         }
 536
 537 CSAN_ATOMIC_FUNC_ADD(8, uint8_t)
 538 CSAN_ATOMIC_FUNC_CLEAR(8, uint8_t)
 539 CSAN_ATOMIC_FUNC_CMPSET(8, uint8_t)
 540 CSAN_ATOMIC_FUNC_FCMPSET(8, uint8_t)
 541 _CSAN_ATOMIC_FUNC_LOAD(8, uint8_t)
 542 CSAN_ATOMIC_FUNC_SET(8, uint8_t)
 543 CSAN_ATOMIC_FUNC_SUBTRACT(8, uint8_t)
 544 _CSAN_ATOMIC_FUNC_STORE(8, uint8_t)
 545 #if 0
 546 CSAN_ATOMIC_FUNC_FETCHADD(8, uint8_t)
 547 CSAN_ATOMIC_FUNC_READANDCLEAR(8, uint8_t)
 548 CSAN_ATOMIC_FUNC_SWAP(8, uint8_t)
 549 CSAN_ATOMIC_FUNC_TESTANDCLEAR(8, uint8_t)
 550 CSAN_ATOMIC_FUNC_TESTANDSET(8, uint8_t)
 551 #endif
 552
 553 CSAN_ATOMIC_FUNC_ADD(16, uint16_t)
 554 CSAN_ATOMIC_FUNC_CLEAR(16, uint16_t)
 555 CSAN_ATOMIC_FUNC_CMPSET(16, uint16_t)
 556 CSAN_ATOMIC_FUNC_FCMPSET(16, uint16_t)
 557 #if defined(__aarch64__)
 558 _CSAN_ATOMIC_FUNC_LOAD(16, uint16_t)
 559 #else
 560 CSAN_ATOMIC_FUNC_LOAD(16, uint16_t)
 561 #endif
 562 CSAN_ATOMIC_FUNC_SET(16, uint16_t)
 563 CSAN_ATOMIC_FUNC_SUBTRACT(16, uint16_t)
 564 _CSAN_ATOMIC_FUNC_STORE(16, uint16_t)
 565 #if 0
 566 CSAN_ATOMIC_FUNC_FETCHADD(16, uint16_t)
 567 CSAN_ATOMIC_FUNC_READANDCLEAR(16, uint16_t)
 568 CSAN_ATOMIC_FUNC_SWAP(16, uint16_t)
 569 CSAN_ATOMIC_FUNC_TESTANDCLEAR(16, uint16_t)
 570 CSAN_ATOMIC_FUNC_TESTANDSET(16, uint16_t)
 571 #endif
 572
 573 CSAN_ATOMIC_FUNC_ADD(32, uint32_t)
 574 CSAN_ATOMIC_FUNC_CLEAR(32, uint32_t)
 575 CSAN_ATOMIC_FUNC_CMPSET(32, uint32_t)
 576 CSAN_ATOMIC_FUNC_FCMPSET(32, uint32_t)
 577 CSAN_ATOMIC_FUNC_FETCHADD(32, uint32_t)
 578 CSAN_ATOMIC_FUNC_LOAD(32, uint32_t)
 579 CSAN_ATOMIC_FUNC_READANDCLEAR(32, uint32_t)
 580 CSAN_ATOMIC_FUNC_SET(32, uint32_t)
 581 CSAN_ATOMIC_FUNC_SUBTRACT(32, uint32_t)
 582 CSAN_ATOMIC_FUNC_STORE(32, uint32_t)
 583 CSAN_ATOMIC_FUNC_SWAP(32, uint32_t)
 584 #if !defined(__aarch64__)
 585 CSAN_ATOMIC_FUNC_TESTANDCLEAR(32, uint32_t)
 586 CSAN_ATOMIC_FUNC_TESTANDSET(32, uint32_t)
 587 #endif
 588
 589 CSAN_ATOMIC_FUNC_ADD(64, uint64_t)
 590 CSAN_ATOMIC_FUNC_CLEAR(64, uint64_t)
 591 CSAN_ATOMIC_FUNC_CMPSET(64, uint64_t)
 592 CSAN_ATOMIC_FUNC_FCMPSET(64, uint64_t)
 593 CSAN_ATOMIC_FUNC_FETCHADD(64, uint64_t)
 594 CSAN_ATOMIC_FUNC_LOAD(64, uint64_t)
 595 CSAN_ATOMIC_FUNC_READANDCLEAR(64, uint64_t)
 596 CSAN_ATOMIC_FUNC_SET(64, uint64_t)
 597 CSAN_ATOMIC_FUNC_SUBTRACT(64, uint64_t)
 598 CSAN_ATOMIC_FUNC_STORE(64, uint64_t)
 599 CSAN_ATOMIC_FUNC_SWAP(64, uint64_t)
 600 #if !defined(__aarch64__)
 601 CSAN_ATOMIC_FUNC_TESTANDCLEAR(64, uint64_t)
 602 CSAN_ATOMIC_FUNC_TESTANDSET(64, uint64_t)
 603 #endif
 604
 605 CSAN_ATOMIC_FUNC_ADD(int, u_int)
 606 CSAN_ATOMIC_FUNC_CLEAR(int, u_int)
 607 CSAN_ATOMIC_FUNC_CMPSET(int, u_int)
 608 CSAN_ATOMIC_FUNC_FCMPSET(int, u_int)
 609 CSAN_ATOMIC_FUNC_FETCHADD(int, u_int)
 610 CSAN_ATOMIC_FUNC_LOAD(int, u_int)
 611 CSAN_ATOMIC_FUNC_READANDCLEAR(int, u_int)
 612 CSAN_ATOMIC_FUNC_SET(int, u_int)
 613 CSAN_ATOMIC_FUNC_SUBTRACT(int, u_int)
 614 CSAN_ATOMIC_FUNC_STORE(int, u_int)
 615 CSAN_ATOMIC_FUNC_SWAP(int, u_int)
 616 #if !defined(__aarch64__)
 617 CSAN_ATOMIC_FUNC_TESTANDCLEAR(int, u_int)
 618 CSAN_ATOMIC_FUNC_TESTANDSET(int, u_int)
 619 #endif
 620
 621 CSAN_ATOMIC_FUNC_ADD(long, u_long)
 622 CSAN_ATOMIC_FUNC_CLEAR(long, u_long)
 623 CSAN_ATOMIC_FUNC_CMPSET(long, u_long)
 624 CSAN_ATOMIC_FUNC_FCMPSET(long, u_long)
 625 CSAN_ATOMIC_FUNC_FETCHADD(long, u_long)
 626 CSAN_ATOMIC_FUNC_LOAD(long, u_long)
 627 CSAN_ATOMIC_FUNC_READANDCLEAR(long, u_long)
 628 CSAN_ATOMIC_FUNC_SET(long, u_long)
 629 CSAN_ATOMIC_FUNC_SUBTRACT(long, u_long)
 630 CSAN_ATOMIC_FUNC_STORE(long, u_long)
 631 CSAN_ATOMIC_FUNC_SWAP(long, u_long)
 632 #if !defined(__aarch64__)
 633 CSAN_ATOMIC_FUNC_TESTANDCLEAR(long, u_long)
 634 CSAN_ATOMIC_FUNC_TESTANDSET(long, u_long)
 635 #endif
 636
 637 CSAN_ATOMIC_FUNC_ADD(ptr, uintptr_t)
 638 CSAN_ATOMIC_FUNC_CLEAR(ptr, uintptr_t)
 639 CSAN_ATOMIC_FUNC_CMPSET(ptr, uintptr_t)
 640 CSAN_ATOMIC_FUNC_FCMPSET(ptr, uintptr_t)
 641 #if !defined(__amd64__)
 642 CSAN_ATOMIC_FUNC_FETCHADD(ptr, uintptr_t)
 643 #endif
 644 CSAN_ATOMIC_FUNC_LOAD(ptr, uintptr_t)
 645 CSAN_ATOMIC_FUNC_READANDCLEAR(ptr, uintptr_t)
 646 CSAN_ATOMIC_FUNC_SET(ptr, uintptr_t)
 647 CSAN_ATOMIC_FUNC_SUBTRACT(ptr, uintptr_t)
 648 CSAN_ATOMIC_FUNC_STORE(ptr, uintptr_t)
 649 CSAN_ATOMIC_FUNC_SWAP(ptr, uintptr_t)
 650 #if 0
 651 CSAN_ATOMIC_FUNC_TESTANDCLEAR(ptr, uintptr_t)
 652 CSAN_ATOMIC_FUNC_TESTANDSET(ptr, uintptr_t)
 653 #endif
 654
 655 #define CSAN_ATOMIC_FUNC_THREAD_FENCE(name)                             \
 656         void kcsan_atomic_thread_fence_##name(void)                     \
 657         {                                                               \
 658                 atomic_thread_fence_##name();                           \
 659         }
 660
 661 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq)
 662 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq_rel)
 663 CSAN_ATOMIC_FUNC_THREAD_FENCE(rel)
 664 CSAN_ATOMIC_FUNC_THREAD_FENCE(seq_cst)
 665
 666 /* -------------------------------------------------------------------------- */
 667
 668 #include <sys/bus.h>
 669 #include <machine/bus.h>
 670 #include <sys/_cscan_bus.h>
 671
 672 int
 673 kcsan_bus_space_map(bus_space_tag_t tag, bus_addr_t hnd, bus_size_t size,
 674     int flags, bus_space_handle_t *handlep)
 675 {
 676
 677         return (bus_space_map(tag, hnd, size, flags, handlep));
 678 }
 679
 680 void
 681 kcsan_bus_space_unmap(bus_space_tag_t tag, bus_space_handle_t hnd,
 682     bus_size_t size)
 683 {
 684
 685         bus_space_unmap(tag, hnd, size);
 686 }
 687
 688 int
 689 kcsan_bus_space_subregion(bus_space_tag_t tag, bus_space_handle_t hnd,
 690     bus_size_t offset, bus_size_t size, bus_space_handle_t *handlep)
 691 {
 692
 693         return (bus_space_subregion(tag, hnd, offset, size, handlep));
 694 }
 695
 696 #if !defined(__amd64__)
 697 int
 698 kcsan_bus_space_alloc(bus_space_tag_t tag, bus_addr_t reg_start,
 699     bus_addr_t reg_end, bus_size_t size, bus_size_t alignment,
 700     bus_size_t boundary, int flags, bus_addr_t *addrp,
 701     bus_space_handle_t *handlep)
 702 {
 703
 704         return (bus_space_alloc(tag, reg_start, reg_end, size, alignment,
 705             boundary, flags, addrp, handlep));
 706 }
 707 #endif
 708
 709 void
 710 kcsan_bus_space_free(bus_space_tag_t tag, bus_space_handle_t hnd,
 711     bus_size_t size)
 712 {
 713
 714         bus_space_free(tag, hnd, size);
 715 }
 716
 717 void
 718 kcsan_bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t hnd,
 719     bus_size_t offset, bus_size_t size, int flags)
 720 {
 721
 722         bus_space_barrier(tag, hnd, offset, size, flags);
 723 }
 724
 725 #define CSAN_BUS_READ_FUNC(func, width, type)                           \
 726         type kcsan_bus_space_read##func##_##width(bus_space_tag_t tag,  \
 727             bus_space_handle_t hnd, bus_size_t offset)                  \
 728         {                                                               \
 729                 return (bus_space_read##func##_##width(tag, hnd,        \
 730                     offset));                                           \
 731         }                                                               \
 732
 733 #define CSAN_BUS_READ_PTR_FUNC(func, width, type)                       \
 734         void kcsan_bus_space_read_##func##_##width(bus_space_tag_t tag, \
 735             bus_space_handle_t hnd, bus_size_t size, type *buf,         \
 736             bus_size_t count)                                           \
 737         {                                                               \
 738                 kcsan_access((uintptr_t)buf, sizeof(type) * count,      \
 739                     false, false, __RET_ADDR);                          \
 740                 bus_space_read_##func##_##width(tag, hnd, size, buf,    \
 741                     count);                                             \
 742         }
 743
 744 CSAN_BUS_READ_FUNC(, 1, uint8_t)
 745 CSAN_BUS_READ_FUNC(_stream, 1, uint8_t)
 746 CSAN_BUS_READ_PTR_FUNC(multi, 1, uint8_t)
 747 CSAN_BUS_READ_PTR_FUNC(multi_stream, 1, uint8_t)
 748 CSAN_BUS_READ_PTR_FUNC(region, 1, uint8_t)
 749 CSAN_BUS_READ_PTR_FUNC(region_stream, 1, uint8_t)
 750
 751 CSAN_BUS_READ_FUNC(, 2, uint16_t)
 752 CSAN_BUS_READ_FUNC(_stream, 2, uint16_t)
 753 CSAN_BUS_READ_PTR_FUNC(multi, 2, uint16_t)
 754 CSAN_BUS_READ_PTR_FUNC(multi_stream, 2, uint16_t)
 755 CSAN_BUS_READ_PTR_FUNC(region, 2, uint16_t)
 756 CSAN_BUS_READ_PTR_FUNC(region_stream, 2, uint16_t)
 757
 758 CSAN_BUS_READ_FUNC(, 4, uint32_t)
 759 CSAN_BUS_READ_FUNC(_stream, 4, uint32_t)
 760 CSAN_BUS_READ_PTR_FUNC(multi, 4, uint32_t)
 761 CSAN_BUS_READ_PTR_FUNC(multi_stream, 4, uint32_t)
 762 CSAN_BUS_READ_PTR_FUNC(region, 4, uint32_t)
 763 CSAN_BUS_READ_PTR_FUNC(region_stream, 4, uint32_t)
 764
 765 CSAN_BUS_READ_FUNC(, 8, uint64_t)
 766 #if defined(__aarch64__)
 767 CSAN_BUS_READ_FUNC(_stream, 8, uint64_t)
 768 CSAN_BUS_READ_PTR_FUNC(multi, 8, uint64_t)
 769 CSAN_BUS_READ_PTR_FUNC(multi_stream, 8, uint64_t)
 770 CSAN_BUS_READ_PTR_FUNC(region, 8, uint64_t)
 771 CSAN_BUS_READ_PTR_FUNC(region_stream, 8, uint64_t)
 772 #endif
 773
 774 #define CSAN_BUS_WRITE_FUNC(func, width, type)                          \
 775         void kcsan_bus_space_write##func##_##width(bus_space_tag_t tag,         \
 776             bus_space_handle_t hnd, bus_size_t offset, type value)      \
 777         {                                                               \
 778                 bus_space_write##func##_##width(tag, hnd, offset, value); \
 779         }                                                               \
 780
 781 #define CSAN_BUS_WRITE_PTR_FUNC(func, width, type)                      \
 782         void kcsan_bus_space_write_##func##_##width(bus_space_tag_t tag, \
 783             bus_space_handle_t hnd, bus_size_t size, const type *buf,   \
 784             bus_size_t count)                                           \
 785         {                                                               \
 786                 kcsan_access((uintptr_t)buf, sizeof(type) * count,      \
 787                     true, false, __RET_ADDR);                           \
 788                 bus_space_write_##func##_##width(tag, hnd, size, buf,   \
 789                     count);                                             \
 790         }
 791
 792 CSAN_BUS_WRITE_FUNC(, 1, uint8_t)
 793 CSAN_BUS_WRITE_FUNC(_stream, 1, uint8_t)
 794 CSAN_BUS_WRITE_PTR_FUNC(multi, 1, uint8_t)
 795 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 1, uint8_t)
 796 CSAN_BUS_WRITE_PTR_FUNC(region, 1, uint8_t)
 797 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 1, uint8_t)
 798
 799 CSAN_BUS_WRITE_FUNC(, 2, uint16_t)
 800 CSAN_BUS_WRITE_FUNC(_stream, 2, uint16_t)
 801 CSAN_BUS_WRITE_PTR_FUNC(multi, 2, uint16_t)
 802 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 2, uint16_t)
 803 CSAN_BUS_WRITE_PTR_FUNC(region, 2, uint16_t)
 804 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 2, uint16_t)
 805
 806 CSAN_BUS_WRITE_FUNC(, 4, uint32_t)
 807 CSAN_BUS_WRITE_FUNC(_stream, 4, uint32_t)
 808 CSAN_BUS_WRITE_PTR_FUNC(multi, 4, uint32_t)
 809 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 4, uint32_t)
 810 CSAN_BUS_WRITE_PTR_FUNC(region, 4, uint32_t)
 811 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 4, uint32_t)
 812
 813 CSAN_BUS_WRITE_FUNC(, 8, uint64_t)
 814 #if defined(__aarch64__)
 815 CSAN_BUS_WRITE_FUNC(_stream, 8, uint64_t)
 816 CSAN_BUS_WRITE_PTR_FUNC(multi, 8, uint64_t)
 817 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 8, uint64_t)
 818 CSAN_BUS_WRITE_PTR_FUNC(region, 8, uint64_t)
 819 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 8, uint64_t)
 820 #endif
 821
 822 #define CSAN_BUS_SET_FUNC(func, width, type)                            \
 823         void kcsan_bus_space_set_##func##_##width(bus_space_tag_t tag,  \
 824             bus_space_handle_t hnd, bus_size_t offset, type value,      \
 825             bus_size_t count)                                           \
 826         {                                                               \
 827                 bus_space_set_##func##_##width(tag, hnd, offset, value, \
 828                     count);                                             \
 829         }
 830
 831 CSAN_BUS_SET_FUNC(multi, 1, uint8_t)
 832 CSAN_BUS_SET_FUNC(region, 1, uint8_t)
 833 #if !defined(__aarch64__)
 834 CSAN_BUS_SET_FUNC(multi_stream, 1, uint8_t)
 835 CSAN_BUS_SET_FUNC(region_stream, 1, uint8_t)
 836 #endif
 837
 838 CSAN_BUS_SET_FUNC(multi, 2, uint16_t)
 839 CSAN_BUS_SET_FUNC(region, 2, uint16_t)
 840 #if !defined(__aarch64__)
 841 CSAN_BUS_SET_FUNC(multi_stream, 2, uint16_t)
 842 CSAN_BUS_SET_FUNC(region_stream, 2, uint16_t)
 843 #endif
 844
 845 CSAN_BUS_SET_FUNC(multi, 4, uint32_t)
 846 CSAN_BUS_SET_FUNC(region, 4, uint32_t)
 847 #if !defined(__aarch64__)
 848 CSAN_BUS_SET_FUNC(multi_stream, 4, uint32_t)
 849 CSAN_BUS_SET_FUNC(region_stream, 4, uint32_t)
 850 #endif
 851
 852 #if !defined(__amd64__)
 853 CSAN_BUS_SET_FUNC(multi, 8, uint64_t)
 854 CSAN_BUS_SET_FUNC(region, 8, uint64_t)
 855 #if !defined(__aarch64__)
 856 CSAN_BUS_SET_FUNC(multi_stream, 8, uint64_t)
 857 CSAN_BUS_SET_FUNC(region_stream, 8, uint64_t)
 858 #endif
 859 #endif
 860