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
 155         new.addr = addr;
 156         new.size = size;
 157         new.write = write;
 158         new.atomic = atomic;
 159         new.pc = pc;
 160
 161         CPU_FOREACH(i) {
 162                 __builtin_memcpy(&old, &kcsan_cpus[i].cell, sizeof(old));
 163
 164                 if (old.addr + old.size <= new.addr)
 165                         continue;
 166                 if (new.addr + new.size <= old.addr)
 167                         continue;
 168                 if (__predict_true(!old.write && !new.write))
 169                         continue;
 170                 if (__predict_true(kcsan_access_is_atomic(&new, &old)))
 171                         continue;
 172
 173                 kcsan_report(&new, PCPU_GET(cpuid), &old, i);
 174                 break;
 175         }
 176
 177         if (__predict_false(!kcsan_md_is_avail()))
 178                 return;
 179
 180         kcsan_md_disable_intrs(&intr);
 181
 182         cpu = &kcsan_cpus[PCPU_GET(cpuid)];
 183         if (__predict_false(!cpu->inited))
 184                 goto out;
 185         cpu->cnt = (cpu->cnt + 1) % KCSAN_NACCESSES;
 186         if (__predict_true(cpu->cnt != 0))
 187                 goto out;
 188
 189         __builtin_memcpy(&cpu->cell, &new, sizeof(new));
 190         kcsan_md_delay(KCSAN_DELAY);
 191         __builtin_memset(&cpu->cell, 0, sizeof(new));
 192
 193 out:
 194         kcsan_md_enable_intrs(&intr);
 195 }
 196
 197 #define CSAN_READ(size)                                                 \
 198         void __tsan_read##size(uintptr_t);                              \
 199         void __tsan_read##size(uintptr_t addr)                          \
 200         {                                                               \
 201                 kcsan_access(addr, size, false, false, __RET_ADDR);     \
 202         }                                                               \
 203         void __tsan_unaligned_read##size(uintptr_t);                    \
 204         void __tsan_unaligned_read##size(uintptr_t addr)                \
 205         {                                                               \
 206                 kcsan_access(addr, size, false, false, __RET_ADDR);     \
 207         }
 208
 209 CSAN_READ(1)
 210 CSAN_READ(2)
 211 CSAN_READ(4)
 212 CSAN_READ(8)
 213 CSAN_READ(16)
 214
 215 #define CSAN_WRITE(size)                                                \
 216         void __tsan_write##size(uintptr_t);                             \
 217         void __tsan_write##size(uintptr_t addr)                         \
 218         {                                                               \
 219                 kcsan_access(addr, size, true, false, __RET_ADDR);      \
 220         }                                                               \
 221         void __tsan_unaligned_write##size(uintptr_t);                   \
 222         void __tsan_unaligned_write##size(uintptr_t addr)               \
 223         {                                                               \
 224                 kcsan_access(addr, size, true, false, __RET_ADDR);      \
 225         }
 226
 227 CSAN_WRITE(1)
 228 CSAN_WRITE(2)
 229 CSAN_WRITE(4)
 230 CSAN_WRITE(8)
 231 CSAN_WRITE(16)
 232
 233 void __tsan_read_range(uintptr_t, size_t);
 234 void __tsan_write_range(uintptr_t, size_t);
 235
 236 void
 237 __tsan_read_range(uintptr_t addr, size_t size)
 238 {
 239         kcsan_access(addr, size, false, false, __RET_ADDR);
 240 }
 241
 242 void
 243 __tsan_write_range(uintptr_t addr, size_t size)
 244 {
 245         kcsan_access(addr, size, true, false, __RET_ADDR);
 246 }
 247
 248 void __tsan_init(void);
 249 void __tsan_func_entry(void *);
 250 void __tsan_func_exit(void);
 251
 252 void
 253 __tsan_init(void)
 254 {
 255 }
 256
 257 void
 258 __tsan_func_entry(void *call_pc)
 259 {
 260 }
 261
 262 void
 263 __tsan_func_exit(void)
 264 {
 265 }
 266
 267 /* -------------------------------------------------------------------------- */
 268
 269 void *
 270 kcsan_memcpy(void *dst, const void *src, size_t len)
 271 {
 272         kcsan_access((uintptr_t)src, len, false, false, __RET_ADDR);
 273         kcsan_access((uintptr_t)dst, len, true, false, __RET_ADDR);
 274         return __builtin_memcpy(dst, src, len);
 275 }
 276
 277 int
 278 kcsan_memcmp(const void *b1, const void *b2, size_t len)
 279 {
 280         kcsan_access((uintptr_t)b1, len, false, false, __RET_ADDR);
 281         kcsan_access((uintptr_t)b2, len, false, false, __RET_ADDR);
 282         return __builtin_memcmp(b1, b2, len);
 283 }
 284
 285 void *
 286 kcsan_memset(void *b, int c, size_t len)
 287 {
 288         kcsan_access((uintptr_t)b, len, true, false, __RET_ADDR);
 289         return __builtin_memset(b, c, len);
 290 }
 291
 292 void *
 293 kcsan_memmove(void *dst, const void *src, size_t len)
 294 {
 295         kcsan_access((uintptr_t)src, len, false, false, __RET_ADDR);
 296         kcsan_access((uintptr_t)dst, len, true, false, __RET_ADDR);
 297         return __builtin_memmove(dst, src, len);
 298 }
 299
 300 char *
 301 kcsan_strcpy(char *dst, const char *src)
 302 {
 303         char *save = dst;
 304
 305         while (1) {
 306                 kcsan_access((uintptr_t)src, 1, false, false, __RET_ADDR);
 307                 kcsan_access((uintptr_t)dst, 1, true, false, __RET_ADDR);
 308                 *dst = *src;
 309                 if (*src == '\0')
 310                         break;
 311                 src++, dst++;
 312         }
 313
 314         return save;
 315 }
 316
 317 int
 318 kcsan_strcmp(const char *s1, const char *s2)
 319 {
 320         while (1) {
 321                 kcsan_access((uintptr_t)s1, 1, false, false, __RET_ADDR);
 322                 kcsan_access((uintptr_t)s2, 1, false, false, __RET_ADDR);
 323                 if (*s1 != *s2)
 324                         break;
 325                 if (*s1 == '\0')
 326                         return 0;
 327                 s1++, s2++;
 328         }
 329
 330         return (*(const unsigned char *)s1 - *(const unsigned char *)s2);
 331 }
 332
 333 size_t
 334 kcsan_strlen(const char *str)
 335 {
 336         const char *s;
 337
 338         s = str;
 339         while (1) {
 340                 kcsan_access((uintptr_t)s, 1, false, false, __RET_ADDR);
 341                 if (*s == '\0')
 342                         break;
 343                 s++;
 344         }
 345
 346         return (s - str);
 347 }
 348
 349 #undef copystr
 350 #undef copyin
 351 #undef copyin_nofault
 352 #undef copyinstr
 353 #undef copyout
 354 #undef copyout_nofault
 355
 356 int
 357 kcsan_copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done)
 358 {
 359         kcsan_access((uintptr_t)kdaddr, len, true, false, __RET_ADDR);
 360         return copystr(kfaddr, kdaddr, len, done);
 361 }
 362
 363 int
 364 kcsan_copyin(const void *uaddr, void *kaddr, size_t len)
 365 {
 366         kcsan_access((uintptr_t)kaddr, len, true, false, __RET_ADDR);
 367         return copyin(uaddr, kaddr, len);
 368 }
 369
 370 int
 371 kcsan_copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done)
 372 {
 373         kcsan_access((uintptr_t)kaddr, len, true, false, __RET_ADDR);
 374         return copyinstr(uaddr, kaddr, len, done);
 375 }
 376
 377 int
 378 kcsan_copyout(const void *kaddr, void *uaddr, size_t len)
 379 {
 380         kcsan_access((uintptr_t)kaddr, len, false, false, __RET_ADDR);
 381         return copyout(kaddr, uaddr, len);
 382 }
 383
 384 /* -------------------------------------------------------------------------- */
 385
 386 #include <machine/atomic.h>
 387 #include <sys/_cscan_atomic.h>
 388
 389 #define _CSAN_ATOMIC_FUNC_ADD(name, type)                               \
 390         void kcsan_atomic_add_##name(volatile type *ptr, type val)      \
 391         {                                                               \
 392                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 393                     __RET_ADDR);                                        \
 394                 atomic_add_##name(ptr, val);                            \
 395         }
 396
 397 #define CSAN_ATOMIC_FUNC_ADD(name, type)                                \
 398         _CSAN_ATOMIC_FUNC_ADD(name, type)                               \
 399         _CSAN_ATOMIC_FUNC_ADD(acq_##name, type)                         \
 400         _CSAN_ATOMIC_FUNC_ADD(rel_##name, type)
 401
 402 #define _CSAN_ATOMIC_FUNC_CLEAR(name, type)                             \
 403         void kcsan_atomic_clear_##name(volatile type *ptr, type val)    \
 404         {                                                               \
 405                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 406                     __RET_ADDR);                                        \
 407                 atomic_clear_##name(ptr, val);                          \
 408         }
 409
 410 #define CSAN_ATOMIC_FUNC_CLEAR(name, type)                              \
 411         _CSAN_ATOMIC_FUNC_CLEAR(name, type)                             \
 412         _CSAN_ATOMIC_FUNC_CLEAR(acq_##name, type)                       \
 413         _CSAN_ATOMIC_FUNC_CLEAR(rel_##name, type)
 414
 415 #define _CSAN_ATOMIC_FUNC_CMPSET(name, type)                            \
 416         int kcsan_atomic_cmpset_##name(volatile type *ptr, type val1,   \
 417             type val2)                                                  \
 418         {                                                               \
 419                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 420                     __RET_ADDR);                                        \
 421                 return (atomic_cmpset_##name(ptr, val1, val2));         \
 422         }
 423
 424 #define CSAN_ATOMIC_FUNC_CMPSET(name, type)                             \
 425         _CSAN_ATOMIC_FUNC_CMPSET(name, type)                            \
 426         _CSAN_ATOMIC_FUNC_CMPSET(acq_##name, type)                      \
 427         _CSAN_ATOMIC_FUNC_CMPSET(rel_##name, type)
 428
 429 #define _CSAN_ATOMIC_FUNC_FCMPSET(name, type)                           \
 430         int kcsan_atomic_fcmpset_##name(volatile type *ptr, type *val1, \
 431             type val2)                                                  \
 432         {                                                               \
 433                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 434                     __RET_ADDR);                                        \
 435                 return (atomic_fcmpset_##name(ptr, val1, val2));        \
 436         }
 437
 438 #define CSAN_ATOMIC_FUNC_FCMPSET(name, type)                            \
 439         _CSAN_ATOMIC_FUNC_FCMPSET(name, type)                           \
 440         _CSAN_ATOMIC_FUNC_FCMPSET(acq_##name, type)                     \
 441         _CSAN_ATOMIC_FUNC_FCMPSET(rel_##name, type)
 442
 443 #define CSAN_ATOMIC_FUNC_FETCHADD(name, type)                           \
 444         type kcsan_atomic_fetchadd_##name(volatile type *ptr, type val) \
 445         {                                                               \
 446                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 447                     __RET_ADDR);                                        \
 448                 return (atomic_fetchadd_##name(ptr, val));              \
 449         }
 450
 451 #define _CSAN_ATOMIC_FUNC_LOAD(name, type)                              \
 452         type kcsan_atomic_load_##name(volatile type *ptr)               \
 453         {                                                               \
 454                 kcsan_access((uintptr_t)ptr, sizeof(type), false, true, \
 455                     __RET_ADDR);                                        \
 456                 return (atomic_load_##name(ptr));                       \
 457         }
 458
 459 #define CSAN_ATOMIC_FUNC_LOAD(name, type)                               \
 460         _CSAN_ATOMIC_FUNC_LOAD(name, type)                              \
 461         _CSAN_ATOMIC_FUNC_LOAD(acq_##name, type)                        \
 462
 463 #define CSAN_ATOMIC_FUNC_READANDCLEAR(name, type)                       \
 464         type kcsan_atomic_readandclear_##name(volatile type *ptr)       \
 465         {                                                               \
 466                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 467                     __RET_ADDR);                                        \
 468                 return (atomic_readandclear_##name(ptr));               \
 469         }
 470
 471 #define _CSAN_ATOMIC_FUNC_SET(name, type)                               \
 472         void kcsan_atomic_set_##name(volatile type *ptr, type val)      \
 473         {                                                               \
 474                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 475                     __RET_ADDR);                                        \
 476                 atomic_set_##name(ptr, val);                            \
 477         }
 478
 479 #define CSAN_ATOMIC_FUNC_SET(name, type)                                \
 480         _CSAN_ATOMIC_FUNC_SET(name, type)                               \
 481         _CSAN_ATOMIC_FUNC_SET(acq_##name, type)                         \
 482         _CSAN_ATOMIC_FUNC_SET(rel_##name, type)
 483
 484 #define _CSAN_ATOMIC_FUNC_SUBTRACT(name, type)                          \
 485         void kcsan_atomic_subtract_##name(volatile type *ptr, type val) \
 486         {                                                               \
 487                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 488                     __RET_ADDR);                                        \
 489                 atomic_subtract_##name(ptr, val);                       \
 490         }
 491
 492
 493 #define CSAN_ATOMIC_FUNC_SUBTRACT(name, type)                           \
 494         _CSAN_ATOMIC_FUNC_SUBTRACT(name, type)                          \
 495         _CSAN_ATOMIC_FUNC_SUBTRACT(acq_##name, type)                    \
 496         _CSAN_ATOMIC_FUNC_SUBTRACT(rel_##name, type)
 497
 498 #define _CSAN_ATOMIC_FUNC_STORE(name, type)                             \
 499         void kcsan_atomic_store_##name(volatile type *ptr, type val)    \
 500         {                                                               \
 501                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 502                     __RET_ADDR);                                        \
 503                 atomic_store_##name(ptr, val);                          \
 504         }
 505
 506 #define CSAN_ATOMIC_FUNC_STORE(name, type)                              \
 507         _CSAN_ATOMIC_FUNC_STORE(name, type)                             \
 508         _CSAN_ATOMIC_FUNC_STORE(rel_##name, type)
 509
 510 #define CSAN_ATOMIC_FUNC_SWAP(name, type)                               \
 511         type kcsan_atomic_swap_##name(volatile type *ptr, type val)     \
 512         {                                                               \
 513                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 514                     __RET_ADDR);                                        \
 515                 return(atomic_swap_##name(ptr, val));                   \
 516         }
 517
 518 #define CSAN_ATOMIC_FUNC_TESTANDCLEAR(name, type)                       \
 519         int kcsan_atomic_testandclear_##name(volatile type *ptr, u_int val) \
 520         {                                                               \
 521                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 522                     __RET_ADDR);                                        \
 523                 return(atomic_testandclear_##name(ptr, val));           \
 524         }
 525
 526 #define CSAN_ATOMIC_FUNC_TESTANDSET(name, type)                         \
 527         int kcsan_atomic_testandset_##name(volatile type *ptr, u_int val) \
 528         {                                                               \
 529                 kcsan_access((uintptr_t)ptr, sizeof(type), true, true,  \
 530                     __RET_ADDR);                                        \
 531                 return (atomic_testandset_##name(ptr, val));            \
 532         }
 533
 534
 535 CSAN_ATOMIC_FUNC_ADD(8, uint8_t)
 536 CSAN_ATOMIC_FUNC_CLEAR(8, uint8_t)
 537 CSAN_ATOMIC_FUNC_CMPSET(8, uint8_t)
 538 CSAN_ATOMIC_FUNC_FCMPSET(8, uint8_t)
 539 _CSAN_ATOMIC_FUNC_LOAD(8, uint8_t)
 540 CSAN_ATOMIC_FUNC_SET(8, uint8_t)
 541 CSAN_ATOMIC_FUNC_SUBTRACT(8, uint8_t)
 542 _CSAN_ATOMIC_FUNC_STORE(8, uint8_t)
 543 #if 0
 544 CSAN_ATOMIC_FUNC_FETCHADD(8, uint8_t)
 545 CSAN_ATOMIC_FUNC_READANDCLEAR(8, uint8_t)
 546 CSAN_ATOMIC_FUNC_SWAP(8, uint8_t)
 547 CSAN_ATOMIC_FUNC_TESTANDCLEAR(8, uint8_t)
 548 CSAN_ATOMIC_FUNC_TESTANDSET(8, uint8_t)
 549 #endif
 550
 551 CSAN_ATOMIC_FUNC_ADD(16, uint16_t)
 552 CSAN_ATOMIC_FUNC_CLEAR(16, uint16_t)
 553 CSAN_ATOMIC_FUNC_CMPSET(16, uint16_t)
 554 CSAN_ATOMIC_FUNC_FCMPSET(16, uint16_t)
 555 #if defined(__aarch64__)
 556 _CSAN_ATOMIC_FUNC_LOAD(16, uint16_t)
 557 #else
 558 CSAN_ATOMIC_FUNC_LOAD(16, uint16_t)
 559 #endif
 560 CSAN_ATOMIC_FUNC_SET(16, uint16_t)
 561 CSAN_ATOMIC_FUNC_SUBTRACT(16, uint16_t)
 562 _CSAN_ATOMIC_FUNC_STORE(16, uint16_t)
 563 #if 0
 564 CSAN_ATOMIC_FUNC_FETCHADD(16, uint16_t)
 565 CSAN_ATOMIC_FUNC_READANDCLEAR(16, uint16_t)
 566 CSAN_ATOMIC_FUNC_SWAP(16, uint16_t)
 567 CSAN_ATOMIC_FUNC_TESTANDCLEAR(16, uint16_t)
 568 CSAN_ATOMIC_FUNC_TESTANDSET(16, uint16_t)
 569 #endif
 570
 571 CSAN_ATOMIC_FUNC_ADD(32, uint32_t)
 572 CSAN_ATOMIC_FUNC_CLEAR(32, uint32_t)
 573 CSAN_ATOMIC_FUNC_CMPSET(32, uint32_t)
 574 CSAN_ATOMIC_FUNC_FCMPSET(32, uint32_t)
 575 CSAN_ATOMIC_FUNC_FETCHADD(32, uint32_t)
 576 CSAN_ATOMIC_FUNC_LOAD(32, uint32_t)
 577 CSAN_ATOMIC_FUNC_READANDCLEAR(32, uint32_t)
 578 CSAN_ATOMIC_FUNC_SET(32, uint32_t)
 579 CSAN_ATOMIC_FUNC_SUBTRACT(32, uint32_t)
 580 CSAN_ATOMIC_FUNC_STORE(32, uint32_t)
 581 CSAN_ATOMIC_FUNC_SWAP(32, uint32_t)
 582 #if !defined(__aarch64__)
 583 CSAN_ATOMIC_FUNC_TESTANDCLEAR(32, uint32_t)
 584 CSAN_ATOMIC_FUNC_TESTANDSET(32, uint32_t)
 585 #endif
 586
 587 CSAN_ATOMIC_FUNC_ADD(64, uint64_t)
 588 CSAN_ATOMIC_FUNC_CLEAR(64, uint64_t)
 589 CSAN_ATOMIC_FUNC_CMPSET(64, uint64_t)
 590 CSAN_ATOMIC_FUNC_FCMPSET(64, uint64_t)
 591 CSAN_ATOMIC_FUNC_FETCHADD(64, uint64_t)
 592 CSAN_ATOMIC_FUNC_LOAD(64, uint64_t)
 593 CSAN_ATOMIC_FUNC_READANDCLEAR(64, uint64_t)
 594 CSAN_ATOMIC_FUNC_SET(64, uint64_t)
 595 CSAN_ATOMIC_FUNC_SUBTRACT(64, uint64_t)
 596 CSAN_ATOMIC_FUNC_STORE(64, uint64_t)
 597 CSAN_ATOMIC_FUNC_SWAP(64, uint64_t)
 598 #if !defined(__aarch64__)
 599 CSAN_ATOMIC_FUNC_TESTANDCLEAR(64, uint64_t)
 600 CSAN_ATOMIC_FUNC_TESTANDSET(64, uint64_t)
 601 #endif
 602
 603 CSAN_ATOMIC_FUNC_ADD(int, u_int)
 604 CSAN_ATOMIC_FUNC_CLEAR(int, u_int)
 605 CSAN_ATOMIC_FUNC_CMPSET(int, u_int)
 606 CSAN_ATOMIC_FUNC_FCMPSET(int, u_int)
 607 CSAN_ATOMIC_FUNC_FETCHADD(int, u_int)
 608 CSAN_ATOMIC_FUNC_LOAD(int, u_int)
 609 CSAN_ATOMIC_FUNC_READANDCLEAR(int, u_int)
 610 CSAN_ATOMIC_FUNC_SET(int, u_int)
 611 CSAN_ATOMIC_FUNC_SUBTRACT(int, u_int)
 612 CSAN_ATOMIC_FUNC_STORE(int, u_int)
 613 CSAN_ATOMIC_FUNC_SWAP(int, u_int)
 614 #if !defined(__aarch64__)
 615 CSAN_ATOMIC_FUNC_TESTANDCLEAR(int, u_int)
 616 CSAN_ATOMIC_FUNC_TESTANDSET(int, u_int)
 617 #endif
 618
 619 CSAN_ATOMIC_FUNC_ADD(long, u_long)
 620 CSAN_ATOMIC_FUNC_CLEAR(long, u_long)
 621 CSAN_ATOMIC_FUNC_CMPSET(long, u_long)
 622 CSAN_ATOMIC_FUNC_FCMPSET(long, u_long)
 623 CSAN_ATOMIC_FUNC_FETCHADD(long, u_long)
 624 CSAN_ATOMIC_FUNC_LOAD(long, u_long)
 625 CSAN_ATOMIC_FUNC_READANDCLEAR(long, u_long)
 626 CSAN_ATOMIC_FUNC_SET(long, u_long)
 627 CSAN_ATOMIC_FUNC_SUBTRACT(long, u_long)
 628 CSAN_ATOMIC_FUNC_STORE(long, u_long)
 629 CSAN_ATOMIC_FUNC_SWAP(long, u_long)
 630 #if !defined(__aarch64__)
 631 CSAN_ATOMIC_FUNC_TESTANDCLEAR(long, u_long)
 632 CSAN_ATOMIC_FUNC_TESTANDSET(long, u_long)
 633 #endif
 634
 635 CSAN_ATOMIC_FUNC_ADD(ptr, uintptr_t)
 636 CSAN_ATOMIC_FUNC_CLEAR(ptr, uintptr_t)
 637 CSAN_ATOMIC_FUNC_CMPSET(ptr, uintptr_t)
 638 CSAN_ATOMIC_FUNC_FCMPSET(ptr, uintptr_t)
 639 #if !defined(__amd64__)
 640 CSAN_ATOMIC_FUNC_FETCHADD(ptr, uintptr_t)
 641 #endif
 642 CSAN_ATOMIC_FUNC_LOAD(ptr, uintptr_t)
 643 CSAN_ATOMIC_FUNC_READANDCLEAR(ptr, uintptr_t)
 644 CSAN_ATOMIC_FUNC_SET(ptr, uintptr_t)
 645 CSAN_ATOMIC_FUNC_SUBTRACT(ptr, uintptr_t)
 646 CSAN_ATOMIC_FUNC_STORE(ptr, uintptr_t)
 647 CSAN_ATOMIC_FUNC_SWAP(ptr, uintptr_t)
 648 #if 0
 649 CSAN_ATOMIC_FUNC_TESTANDCLEAR(ptr, uintptr_t)
 650 CSAN_ATOMIC_FUNC_TESTANDSET(ptr, uintptr_t)
 651 #endif
 652
 653 #define CSAN_ATOMIC_FUNC_THREAD_FENCE(name)                             \
 654         void kcsan_atomic_thread_fence_##name(void)                     \
 655         {                                                               \
 656                 atomic_thread_fence_##name();                           \
 657         }
 658
 659
 660 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq)
 661 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq_rel)
 662 CSAN_ATOMIC_FUNC_THREAD_FENCE(rel)
 663 CSAN_ATOMIC_FUNC_THREAD_FENCE(seq_cst)
 664
 665 /* -------------------------------------------------------------------------- */
 666
 667 #include <sys/bus.h>
 668 #include <machine/bus.h>
 669 #include <sys/_cscan_bus.h>
 670
 671 int
 672 kcsan_bus_space_map(bus_space_tag_t tag, bus_addr_t hnd, bus_size_t size,
 673     int flags, bus_space_handle_t *handlep)
 674 {
 675
 676         return (bus_space_map(tag, hnd, size, flags, handlep));
 677 }
 678
 679 void
 680 kcsan_bus_space_unmap(bus_space_tag_t tag, bus_space_handle_t hnd,
 681     bus_size_t size)
 682 {
 683
 684         bus_space_unmap(tag, hnd, size);
 685 }
 686
 687 int
 688 kcsan_bus_space_subregion(bus_space_tag_t tag, bus_space_handle_t hnd,
 689     bus_size_t offset, bus_size_t size, bus_space_handle_t *handlep)
 690 {
 691
 692         return (bus_space_subregion(tag, hnd, offset, size, handlep));
 693 }
 694
 695 #if !defined(__amd64__)
 696 int
 697 kcsan_bus_space_alloc(bus_space_tag_t tag, bus_addr_t reg_start,
 698     bus_addr_t reg_end, bus_size_t size, bus_size_t alignment,
 699     bus_size_t boundary, int flags, bus_addr_t *addrp,
 700     bus_space_handle_t *handlep)
 701 {
 702
 703         return (bus_space_alloc(tag, reg_start, reg_end, size, alignment,
 704             boundary, flags, addrp, handlep));
 705 }
 706 #endif
 707
 708 void
 709 kcsan_bus_space_free(bus_space_tag_t tag, bus_space_handle_t hnd,
 710     bus_size_t size)
 711 {
 712
 713         bus_space_free(tag, hnd, size);
 714 }
 715
 716 void
 717 kcsan_bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t hnd,
 718     bus_size_t offset, bus_size_t size, int flags)
 719 {
 720
 721         bus_space_barrier(tag, hnd, offset, size, flags);
 722 }
 723
 724 #define CSAN_BUS_READ_FUNC(func, width, type)                           \
 725         type kcsan_bus_space_read##func##_##width(bus_space_tag_t tag,  \
 726             bus_space_handle_t hnd, bus_size_t offset)                  \
 727         {                                                               \
 728                 return (bus_space_read##func##_##width(tag, hnd,        \
 729                     offset));                                           \
 730         }                                                               \
 731
 732 #define CSAN_BUS_READ_PTR_FUNC(func, width, type)                       \
 733         void kcsan_bus_space_read_##func##_##width(bus_space_tag_t tag, \
 734             bus_space_handle_t hnd, bus_size_t size, type *buf,         \
 735             bus_size_t count)                                           \
 736         {                                                               \
 737                 kcsan_access((uintptr_t)buf, sizeof(type) * count,      \
 738                     false, false, __RET_ADDR);                          \
 739                 bus_space_read_##func##_##width(tag, hnd, size, buf,    \
 740                     count);                                             \
 741         }
 742
 743 CSAN_BUS_READ_FUNC(, 1, uint8_t)
 744 CSAN_BUS_READ_FUNC(_stream, 1, uint8_t)
 745 CSAN_BUS_READ_PTR_FUNC(multi, 1, uint8_t)
 746 CSAN_BUS_READ_PTR_FUNC(multi_stream, 1, uint8_t)
 747 CSAN_BUS_READ_PTR_FUNC(region, 1, uint8_t)
 748 CSAN_BUS_READ_PTR_FUNC(region_stream, 1, uint8_t)
 749
 750 CSAN_BUS_READ_FUNC(, 2, uint16_t)
 751 CSAN_BUS_READ_FUNC(_stream, 2, uint16_t)
 752 CSAN_BUS_READ_PTR_FUNC(multi, 2, uint16_t)
 753 CSAN_BUS_READ_PTR_FUNC(multi_stream, 2, uint16_t)
 754 CSAN_BUS_READ_PTR_FUNC(region, 2, uint16_t)
 755 CSAN_BUS_READ_PTR_FUNC(region_stream, 2, uint16_t)
 756
 757 CSAN_BUS_READ_FUNC(, 4, uint32_t)
 758 CSAN_BUS_READ_FUNC(_stream, 4, uint32_t)
 759 CSAN_BUS_READ_PTR_FUNC(multi, 4, uint32_t)
 760 CSAN_BUS_READ_PTR_FUNC(multi_stream, 4, uint32_t)
 761 CSAN_BUS_READ_PTR_FUNC(region, 4, uint32_t)
 762 CSAN_BUS_READ_PTR_FUNC(region_stream, 4, uint32_t)
 763
 764 CSAN_BUS_READ_FUNC(, 8, uint64_t)
 765 #if defined(__aarch64__)
 766 CSAN_BUS_READ_FUNC(_stream, 8, uint64_t)
 767 CSAN_BUS_READ_PTR_FUNC(multi, 8, uint64_t)
 768 CSAN_BUS_READ_PTR_FUNC(multi_stream, 8, uint64_t)
 769 CSAN_BUS_READ_PTR_FUNC(region, 8, uint64_t)
 770 CSAN_BUS_READ_PTR_FUNC(region_stream, 8, uint64_t)
 771 #endif
 772
 773 #define CSAN_BUS_WRITE_FUNC(func, width, type)                          \
 774         void kcsan_bus_space_write##func##_##width(bus_space_tag_t tag,         \
 775             bus_space_handle_t hnd, bus_size_t offset, type value)      \
 776         {                                                               \
 777                 bus_space_write##func##_##width(tag, hnd, offset, value); \
 778         }                                                               \
 779
 780 #define CSAN_BUS_WRITE_PTR_FUNC(func, width, type)                      \
 781         void kcsan_bus_space_write_##func##_##width(bus_space_tag_t tag, \
 782             bus_space_handle_t hnd, bus_size_t size, const type *buf,   \
 783             bus_size_t count)                                           \
 784         {                                                               \
 785                 kcsan_access((uintptr_t)buf, sizeof(type) * count,      \
 786                     true, false, __RET_ADDR);                           \
 787                 bus_space_write_##func##_##width(tag, hnd, size, buf,   \
 788                     count);                                             \
 789         }
 790
 791 CSAN_BUS_WRITE_FUNC(, 1, uint8_t)
 792 CSAN_BUS_WRITE_FUNC(_stream, 1, uint8_t)
 793 CSAN_BUS_WRITE_PTR_FUNC(multi, 1, uint8_t)
 794 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 1, uint8_t)
 795 CSAN_BUS_WRITE_PTR_FUNC(region, 1, uint8_t)
 796 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 1, uint8_t)
 797
 798 CSAN_BUS_WRITE_FUNC(, 2, uint16_t)
 799 CSAN_BUS_WRITE_FUNC(_stream, 2, uint16_t)
 800 CSAN_BUS_WRITE_PTR_FUNC(multi, 2, uint16_t)
 801 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 2, uint16_t)
 802 CSAN_BUS_WRITE_PTR_FUNC(region, 2, uint16_t)
 803 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 2, uint16_t)
 804
 805 CSAN_BUS_WRITE_FUNC(, 4, uint32_t)
 806 CSAN_BUS_WRITE_FUNC(_stream, 4, uint32_t)
 807 CSAN_BUS_WRITE_PTR_FUNC(multi, 4, uint32_t)
 808 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 4, uint32_t)
 809 CSAN_BUS_WRITE_PTR_FUNC(region, 4, uint32_t)
 810 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 4, uint32_t)
 811
 812 CSAN_BUS_WRITE_FUNC(, 8, uint64_t)
 813 #if defined(__aarch64__)
 814 CSAN_BUS_WRITE_FUNC(_stream, 8, uint64_t)
 815 CSAN_BUS_WRITE_PTR_FUNC(multi, 8, uint64_t)
 816 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 8, uint64_t)
 817 CSAN_BUS_WRITE_PTR_FUNC(region, 8, uint64_t)
 818 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 8, uint64_t)
 819 #endif
 820
 821 #define CSAN_BUS_SET_FUNC(func, width, type)                            \
 822         void kcsan_bus_space_set_##func##_##width(bus_space_tag_t tag,  \
 823             bus_space_handle_t hnd, bus_size_t offset, type value,      \
 824             bus_size_t count)                                           \
 825         {                                                               \
 826                 bus_space_set_##func##_##width(tag, hnd, offset, value, \
 827                     count);                                             \
 828         }
 829
 830 CSAN_BUS_SET_FUNC(multi, 1, uint8_t)
 831 CSAN_BUS_SET_FUNC(multi_stream, 1, uint8_t)
 832 CSAN_BUS_SET_FUNC(region, 1, uint8_t)
 833 CSAN_BUS_SET_FUNC(region_stream, 1, uint8_t)
 834
 835 CSAN_BUS_SET_FUNC(multi, 2, uint16_t)
 836 CSAN_BUS_SET_FUNC(multi_stream, 2, uint16_t)
 837 CSAN_BUS_SET_FUNC(region, 2, uint16_t)
 838 CSAN_BUS_SET_FUNC(region_stream, 2, uint16_t)
 839
 840 CSAN_BUS_SET_FUNC(multi, 4, uint32_t)
 841 CSAN_BUS_SET_FUNC(multi_stream, 4, uint32_t)
 842 CSAN_BUS_SET_FUNC(region, 4, uint32_t)
 843 CSAN_BUS_SET_FUNC(region_stream, 4, uint32_t)
 844
 845 #if !defined(__amd64__)
 846 CSAN_BUS_SET_FUNC(multi, 8, uint64_t)
 847 CSAN_BUS_SET_FUNC(multi_stream, 8, uint64_t)
 848 CSAN_BUS_SET_FUNC(region, 8, uint64_t)
 849 CSAN_BUS_SET_FUNC(region_stream, 8, uint64_t)
 850 #endif
 851