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 copyin 354 #undef copyin_nofault 355 #undef copyinstr 356 #undef copyout 357 #undef copyout_nofault 358 359 int 360 kcsan_copyin(const void *uaddr, void *kaddr, size_t len) 361 { 362 kcsan_access((uintptr_t)kaddr, len, true, false, __RET_ADDR); 363 return copyin(uaddr, kaddr, len); 364 } 365 366 int 367 kcsan_copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done) 368 { 369 kcsan_access((uintptr_t)kaddr, len, true, false, __RET_ADDR); 370 return copyinstr(uaddr, kaddr, len, done); 371 } 372 373 int 374 kcsan_copyout(const void *kaddr, void *uaddr, size_t len) 375 { 376 kcsan_access((uintptr_t)kaddr, len, false, false, __RET_ADDR); 377 return copyout(kaddr, uaddr, len); 378 } 379 380 /* -------------------------------------------------------------------------- */ 381 382 #include <machine/atomic.h> 383 #include <sys/_cscan_atomic.h> 384 385 #define _CSAN_ATOMIC_FUNC_ADD(name, type) \ 386 void kcsan_atomic_add_##name(volatile type *ptr, type val) \ 387 { \ 388 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 389 __RET_ADDR); \ 390 atomic_add_##name(ptr, val); \ 391 } 392 393 #define CSAN_ATOMIC_FUNC_ADD(name, type) \ 394 _CSAN_ATOMIC_FUNC_ADD(name, type) \ 395 _CSAN_ATOMIC_FUNC_ADD(acq_##name, type) \ 396 _CSAN_ATOMIC_FUNC_ADD(rel_##name, type) 397 398 #define _CSAN_ATOMIC_FUNC_CLEAR(name, type) \ 399 void kcsan_atomic_clear_##name(volatile type *ptr, type val) \ 400 { \ 401 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 402 __RET_ADDR); \ 403 atomic_clear_##name(ptr, val); \ 404 } 405 406 #define CSAN_ATOMIC_FUNC_CLEAR(name, type) \ 407 _CSAN_ATOMIC_FUNC_CLEAR(name, type) \ 408 _CSAN_ATOMIC_FUNC_CLEAR(acq_##name, type) \ 409 _CSAN_ATOMIC_FUNC_CLEAR(rel_##name, type) 410 411 #define _CSAN_ATOMIC_FUNC_CMPSET(name, type) \ 412 int kcsan_atomic_cmpset_##name(volatile type *ptr, type val1, \ 413 type val2) \ 414 { \ 415 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 416 __RET_ADDR); \ 417 return (atomic_cmpset_##name(ptr, val1, val2)); \ 418 } 419 420 #define CSAN_ATOMIC_FUNC_CMPSET(name, type) \ 421 _CSAN_ATOMIC_FUNC_CMPSET(name, type) \ 422 _CSAN_ATOMIC_FUNC_CMPSET(acq_##name, type) \ 423 _CSAN_ATOMIC_FUNC_CMPSET(rel_##name, type) 424 425 #define _CSAN_ATOMIC_FUNC_FCMPSET(name, type) \ 426 int kcsan_atomic_fcmpset_##name(volatile type *ptr, type *val1, \ 427 type val2) \ 428 { \ 429 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 430 __RET_ADDR); \ 431 return (atomic_fcmpset_##name(ptr, val1, val2)); \ 432 } 433 434 #define CSAN_ATOMIC_FUNC_FCMPSET(name, type) \ 435 _CSAN_ATOMIC_FUNC_FCMPSET(name, type) \ 436 _CSAN_ATOMIC_FUNC_FCMPSET(acq_##name, type) \ 437 _CSAN_ATOMIC_FUNC_FCMPSET(rel_##name, type) 438 439 #define CSAN_ATOMIC_FUNC_FETCHADD(name, type) \ 440 type kcsan_atomic_fetchadd_##name(volatile type *ptr, type val) \ 441 { \ 442 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 443 __RET_ADDR); \ 444 return (atomic_fetchadd_##name(ptr, val)); \ 445 } 446 447 #define _CSAN_ATOMIC_FUNC_LOAD(name, type) \ 448 type kcsan_atomic_load_##name(volatile type *ptr) \ 449 { \ 450 kcsan_access((uintptr_t)ptr, sizeof(type), false, true, \ 451 __RET_ADDR); \ 452 return (atomic_load_##name(ptr)); \ 453 } 454 455 #define CSAN_ATOMIC_FUNC_LOAD(name, type) \ 456 _CSAN_ATOMIC_FUNC_LOAD(name, type) \ 457 _CSAN_ATOMIC_FUNC_LOAD(acq_##name, type) \ 458 459 #define CSAN_ATOMIC_FUNC_READANDCLEAR(name, type) \ 460 type kcsan_atomic_readandclear_##name(volatile type *ptr) \ 461 { \ 462 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 463 __RET_ADDR); \ 464 return (atomic_readandclear_##name(ptr)); \ 465 } 466 467 #define _CSAN_ATOMIC_FUNC_SET(name, type) \ 468 void kcsan_atomic_set_##name(volatile type *ptr, type val) \ 469 { \ 470 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 471 __RET_ADDR); \ 472 atomic_set_##name(ptr, val); \ 473 } 474 475 #define CSAN_ATOMIC_FUNC_SET(name, type) \ 476 _CSAN_ATOMIC_FUNC_SET(name, type) \ 477 _CSAN_ATOMIC_FUNC_SET(acq_##name, type) \ 478 _CSAN_ATOMIC_FUNC_SET(rel_##name, type) 479 480 #define _CSAN_ATOMIC_FUNC_SUBTRACT(name, type) \ 481 void kcsan_atomic_subtract_##name(volatile type *ptr, type val) \ 482 { \ 483 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 484 __RET_ADDR); \ 485 atomic_subtract_##name(ptr, val); \ 486 } 487 488 #define CSAN_ATOMIC_FUNC_SUBTRACT(name, type) \ 489 _CSAN_ATOMIC_FUNC_SUBTRACT(name, type) \ 490 _CSAN_ATOMIC_FUNC_SUBTRACT(acq_##name, type) \ 491 _CSAN_ATOMIC_FUNC_SUBTRACT(rel_##name, type) 492 493 #define _CSAN_ATOMIC_FUNC_STORE(name, type) \ 494 void kcsan_atomic_store_##name(volatile type *ptr, type val) \ 495 { \ 496 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 497 __RET_ADDR); \ 498 atomic_store_##name(ptr, val); \ 499 } 500 501 #define CSAN_ATOMIC_FUNC_STORE(name, type) \ 502 _CSAN_ATOMIC_FUNC_STORE(name, type) \ 503 _CSAN_ATOMIC_FUNC_STORE(rel_##name, type) 504 505 #define CSAN_ATOMIC_FUNC_SWAP(name, type) \ 506 type kcsan_atomic_swap_##name(volatile type *ptr, type val) \ 507 { \ 508 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 509 __RET_ADDR); \ 510 return(atomic_swap_##name(ptr, val)); \ 511 } 512 513 #define CSAN_ATOMIC_FUNC_TESTANDCLEAR(name, type) \ 514 int kcsan_atomic_testandclear_##name(volatile type *ptr, u_int val) \ 515 { \ 516 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 517 __RET_ADDR); \ 518 return(atomic_testandclear_##name(ptr, val)); \ 519 } 520 521 #define CSAN_ATOMIC_FUNC_TESTANDSET(name, type) \ 522 int kcsan_atomic_testandset_##name(volatile type *ptr, u_int val) \ 523 { \ 524 kcsan_access((uintptr_t)ptr, sizeof(type), true, true, \ 525 __RET_ADDR); \ 526 return (atomic_testandset_##name(ptr, val)); \ 527 } 528 529 CSAN_ATOMIC_FUNC_ADD(8, uint8_t) 530 CSAN_ATOMIC_FUNC_CLEAR(8, uint8_t) 531 CSAN_ATOMIC_FUNC_CMPSET(8, uint8_t) 532 CSAN_ATOMIC_FUNC_FCMPSET(8, uint8_t) 533 CSAN_ATOMIC_FUNC_LOAD(8, uint8_t) 534 CSAN_ATOMIC_FUNC_SET(8, uint8_t) 535 CSAN_ATOMIC_FUNC_SUBTRACT(8, uint8_t) 536 _CSAN_ATOMIC_FUNC_STORE(8, uint8_t) 537 #if 0 538 CSAN_ATOMIC_FUNC_FETCHADD(8, uint8_t) 539 CSAN_ATOMIC_FUNC_READANDCLEAR(8, uint8_t) 540 CSAN_ATOMIC_FUNC_SWAP(8, uint8_t) 541 CSAN_ATOMIC_FUNC_TESTANDCLEAR(8, uint8_t) 542 CSAN_ATOMIC_FUNC_TESTANDSET(8, uint8_t) 543 #endif 544 545 CSAN_ATOMIC_FUNC_ADD(16, uint16_t) 546 CSAN_ATOMIC_FUNC_CLEAR(16, uint16_t) 547 CSAN_ATOMIC_FUNC_CMPSET(16, uint16_t) 548 CSAN_ATOMIC_FUNC_FCMPSET(16, uint16_t) 549 CSAN_ATOMIC_FUNC_LOAD(16, uint16_t) 550 CSAN_ATOMIC_FUNC_SET(16, uint16_t) 551 CSAN_ATOMIC_FUNC_SUBTRACT(16, uint16_t) 552 _CSAN_ATOMIC_FUNC_STORE(16, uint16_t) 553 #if 0 554 CSAN_ATOMIC_FUNC_FETCHADD(16, uint16_t) 555 CSAN_ATOMIC_FUNC_READANDCLEAR(16, uint16_t) 556 CSAN_ATOMIC_FUNC_SWAP(16, uint16_t) 557 CSAN_ATOMIC_FUNC_TESTANDCLEAR(16, uint16_t) 558 CSAN_ATOMIC_FUNC_TESTANDSET(16, uint16_t) 559 #endif 560 561 CSAN_ATOMIC_FUNC_ADD(32, uint32_t) 562 CSAN_ATOMIC_FUNC_CLEAR(32, uint32_t) 563 CSAN_ATOMIC_FUNC_CMPSET(32, uint32_t) 564 CSAN_ATOMIC_FUNC_FCMPSET(32, uint32_t) 565 CSAN_ATOMIC_FUNC_FETCHADD(32, uint32_t) 566 CSAN_ATOMIC_FUNC_LOAD(32, uint32_t) 567 CSAN_ATOMIC_FUNC_READANDCLEAR(32, uint32_t) 568 CSAN_ATOMIC_FUNC_SET(32, uint32_t) 569 CSAN_ATOMIC_FUNC_SUBTRACT(32, uint32_t) 570 CSAN_ATOMIC_FUNC_STORE(32, uint32_t) 571 CSAN_ATOMIC_FUNC_SWAP(32, uint32_t) 572 #if !defined(__aarch64__) 573 CSAN_ATOMIC_FUNC_TESTANDCLEAR(32, uint32_t) 574 CSAN_ATOMIC_FUNC_TESTANDSET(32, uint32_t) 575 #endif 576 577 CSAN_ATOMIC_FUNC_ADD(64, uint64_t) 578 CSAN_ATOMIC_FUNC_CLEAR(64, uint64_t) 579 CSAN_ATOMIC_FUNC_CMPSET(64, uint64_t) 580 CSAN_ATOMIC_FUNC_FCMPSET(64, uint64_t) 581 CSAN_ATOMIC_FUNC_FETCHADD(64, uint64_t) 582 CSAN_ATOMIC_FUNC_LOAD(64, uint64_t) 583 CSAN_ATOMIC_FUNC_READANDCLEAR(64, uint64_t) 584 CSAN_ATOMIC_FUNC_SET(64, uint64_t) 585 CSAN_ATOMIC_FUNC_SUBTRACT(64, uint64_t) 586 CSAN_ATOMIC_FUNC_STORE(64, uint64_t) 587 CSAN_ATOMIC_FUNC_SWAP(64, uint64_t) 588 #if !defined(__aarch64__) 589 CSAN_ATOMIC_FUNC_TESTANDCLEAR(64, uint64_t) 590 CSAN_ATOMIC_FUNC_TESTANDSET(64, uint64_t) 591 #endif 592 593 CSAN_ATOMIC_FUNC_ADD(char, uint8_t) 594 CSAN_ATOMIC_FUNC_CLEAR(char, uint8_t) 595 CSAN_ATOMIC_FUNC_CMPSET(char, uint8_t) 596 CSAN_ATOMIC_FUNC_FCMPSET(char, uint8_t) 597 CSAN_ATOMIC_FUNC_LOAD(char, uint8_t) 598 CSAN_ATOMIC_FUNC_SET(char, uint8_t) 599 CSAN_ATOMIC_FUNC_SUBTRACT(char, uint8_t) 600 _CSAN_ATOMIC_FUNC_STORE(char, uint8_t) 601 #if 0 602 CSAN_ATOMIC_FUNC_FETCHADD(char, uint8_t) 603 CSAN_ATOMIC_FUNC_READANDCLEAR(char, uint8_t) 604 CSAN_ATOMIC_FUNC_SWAP(char, uint8_t) 605 CSAN_ATOMIC_FUNC_TESTANDCLEAR(char, uint8_t) 606 CSAN_ATOMIC_FUNC_TESTANDSET(char, uint8_t) 607 #endif 608 609 CSAN_ATOMIC_FUNC_ADD(short, uint16_t) 610 CSAN_ATOMIC_FUNC_CLEAR(short, uint16_t) 611 CSAN_ATOMIC_FUNC_CMPSET(short, uint16_t) 612 CSAN_ATOMIC_FUNC_FCMPSET(short, uint16_t) 613 CSAN_ATOMIC_FUNC_LOAD(short, uint16_t) 614 CSAN_ATOMIC_FUNC_SET(short, uint16_t) 615 CSAN_ATOMIC_FUNC_SUBTRACT(short, uint16_t) 616 _CSAN_ATOMIC_FUNC_STORE(short, uint16_t) 617 #if 0 618 CSAN_ATOMIC_FUNC_FETCHADD(short, uint16_t) 619 CSAN_ATOMIC_FUNC_READANDCLEAR(short, uint16_t) 620 CSAN_ATOMIC_FUNC_SWAP(short, uint16_t) 621 CSAN_ATOMIC_FUNC_TESTANDCLEAR(short, uint16_t) 622 CSAN_ATOMIC_FUNC_TESTANDSET(short, uint16_t) 623 #endif 624 625 CSAN_ATOMIC_FUNC_ADD(int, u_int) 626 CSAN_ATOMIC_FUNC_CLEAR(int, u_int) 627 CSAN_ATOMIC_FUNC_CMPSET(int, u_int) 628 CSAN_ATOMIC_FUNC_FCMPSET(int, u_int) 629 CSAN_ATOMIC_FUNC_FETCHADD(int, u_int) 630 CSAN_ATOMIC_FUNC_LOAD(int, u_int) 631 CSAN_ATOMIC_FUNC_READANDCLEAR(int, u_int) 632 CSAN_ATOMIC_FUNC_SET(int, u_int) 633 CSAN_ATOMIC_FUNC_SUBTRACT(int, u_int) 634 CSAN_ATOMIC_FUNC_STORE(int, u_int) 635 CSAN_ATOMIC_FUNC_SWAP(int, u_int) 636 #if !defined(__aarch64__) 637 CSAN_ATOMIC_FUNC_TESTANDCLEAR(int, u_int) 638 CSAN_ATOMIC_FUNC_TESTANDSET(int, u_int) 639 #endif 640 641 CSAN_ATOMIC_FUNC_ADD(long, u_long) 642 CSAN_ATOMIC_FUNC_CLEAR(long, u_long) 643 CSAN_ATOMIC_FUNC_CMPSET(long, u_long) 644 CSAN_ATOMIC_FUNC_FCMPSET(long, u_long) 645 CSAN_ATOMIC_FUNC_FETCHADD(long, u_long) 646 CSAN_ATOMIC_FUNC_LOAD(long, u_long) 647 CSAN_ATOMIC_FUNC_READANDCLEAR(long, u_long) 648 CSAN_ATOMIC_FUNC_SET(long, u_long) 649 CSAN_ATOMIC_FUNC_SUBTRACT(long, u_long) 650 CSAN_ATOMIC_FUNC_STORE(long, u_long) 651 CSAN_ATOMIC_FUNC_SWAP(long, u_long) 652 #if !defined(__aarch64__) 653 CSAN_ATOMIC_FUNC_TESTANDCLEAR(long, u_long) 654 CSAN_ATOMIC_FUNC_TESTANDSET(long, u_long) 655 CSAN_ATOMIC_FUNC_TESTANDSET(acq_long, u_long) 656 #endif 657 658 CSAN_ATOMIC_FUNC_ADD(ptr, uintptr_t) 659 CSAN_ATOMIC_FUNC_CLEAR(ptr, uintptr_t) 660 CSAN_ATOMIC_FUNC_CMPSET(ptr, uintptr_t) 661 CSAN_ATOMIC_FUNC_FCMPSET(ptr, uintptr_t) 662 #if !defined(__amd64__) 663 CSAN_ATOMIC_FUNC_FETCHADD(ptr, uintptr_t) 664 #endif 665 CSAN_ATOMIC_FUNC_LOAD(ptr, uintptr_t) 666 CSAN_ATOMIC_FUNC_READANDCLEAR(ptr, uintptr_t) 667 CSAN_ATOMIC_FUNC_SET(ptr, uintptr_t) 668 CSAN_ATOMIC_FUNC_SUBTRACT(ptr, uintptr_t) 669 CSAN_ATOMIC_FUNC_STORE(ptr, uintptr_t) 670 CSAN_ATOMIC_FUNC_SWAP(ptr, uintptr_t) 671 #if 0 672 CSAN_ATOMIC_FUNC_TESTANDCLEAR(ptr, uintptr_t) 673 CSAN_ATOMIC_FUNC_TESTANDSET(ptr, uintptr_t) 674 #endif 675 676 #define CSAN_ATOMIC_FUNC_THREAD_FENCE(name) \ 677 void kcsan_atomic_thread_fence_##name(void) \ 678 { \ 679 atomic_thread_fence_##name(); \ 680 } 681 682 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq) 683 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq_rel) 684 CSAN_ATOMIC_FUNC_THREAD_FENCE(rel) 685 CSAN_ATOMIC_FUNC_THREAD_FENCE(seq_cst) 686 687 /* -------------------------------------------------------------------------- */ 688 689 #include <sys/bus.h> 690 #include <machine/bus.h> 691 #include <sys/_cscan_bus.h> 692 693 int 694 kcsan_bus_space_map(bus_space_tag_t tag, bus_addr_t hnd, bus_size_t size, 695 int flags, bus_space_handle_t *handlep) 696 { 697 698 return (bus_space_map(tag, hnd, size, flags, handlep)); 699 } 700 701 void 702 kcsan_bus_space_unmap(bus_space_tag_t tag, bus_space_handle_t hnd, 703 bus_size_t size) 704 { 705 706 bus_space_unmap(tag, hnd, size); 707 } 708 709 int 710 kcsan_bus_space_subregion(bus_space_tag_t tag, bus_space_handle_t hnd, 711 bus_size_t offset, bus_size_t size, bus_space_handle_t *handlep) 712 { 713 714 return (bus_space_subregion(tag, hnd, offset, size, handlep)); 715 } 716 717 #if !defined(__amd64__) 718 int 719 kcsan_bus_space_alloc(bus_space_tag_t tag, bus_addr_t reg_start, 720 bus_addr_t reg_end, bus_size_t size, bus_size_t alignment, 721 bus_size_t boundary, int flags, bus_addr_t *addrp, 722 bus_space_handle_t *handlep) 723 { 724 725 return (bus_space_alloc(tag, reg_start, reg_end, size, alignment, 726 boundary, flags, addrp, handlep)); 727 } 728 #endif 729 730 void 731 kcsan_bus_space_free(bus_space_tag_t tag, bus_space_handle_t hnd, 732 bus_size_t size) 733 { 734 735 bus_space_free(tag, hnd, size); 736 } 737 738 void 739 kcsan_bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t hnd, 740 bus_size_t offset, bus_size_t size, int flags) 741 { 742 743 bus_space_barrier(tag, hnd, offset, size, flags); 744 } 745 746 #define CSAN_BUS_READ_FUNC(func, width, type) \ 747 type kcsan_bus_space_read##func##_##width(bus_space_tag_t tag, \ 748 bus_space_handle_t hnd, bus_size_t offset) \ 749 { \ 750 return (bus_space_read##func##_##width(tag, hnd, \ 751 offset)); \ 752 } \ 753 754 #define CSAN_BUS_READ_PTR_FUNC(func, width, type) \ 755 void kcsan_bus_space_read_##func##_##width(bus_space_tag_t tag, \ 756 bus_space_handle_t hnd, bus_size_t size, type *buf, \ 757 bus_size_t count) \ 758 { \ 759 kcsan_access((uintptr_t)buf, sizeof(type) * count, \ 760 false, false, __RET_ADDR); \ 761 bus_space_read_##func##_##width(tag, hnd, size, buf, \ 762 count); \ 763 } 764 765 CSAN_BUS_READ_FUNC(, 1, uint8_t) 766 CSAN_BUS_READ_FUNC(_stream, 1, uint8_t) 767 CSAN_BUS_READ_PTR_FUNC(multi, 1, uint8_t) 768 CSAN_BUS_READ_PTR_FUNC(multi_stream, 1, uint8_t) 769 CSAN_BUS_READ_PTR_FUNC(region, 1, uint8_t) 770 CSAN_BUS_READ_PTR_FUNC(region_stream, 1, uint8_t) 771 772 CSAN_BUS_READ_FUNC(, 2, uint16_t) 773 CSAN_BUS_READ_FUNC(_stream, 2, uint16_t) 774 CSAN_BUS_READ_PTR_FUNC(multi, 2, uint16_t) 775 CSAN_BUS_READ_PTR_FUNC(multi_stream, 2, uint16_t) 776 CSAN_BUS_READ_PTR_FUNC(region, 2, uint16_t) 777 CSAN_BUS_READ_PTR_FUNC(region_stream, 2, uint16_t) 778 779 CSAN_BUS_READ_FUNC(, 4, uint32_t) 780 CSAN_BUS_READ_FUNC(_stream, 4, uint32_t) 781 CSAN_BUS_READ_PTR_FUNC(multi, 4, uint32_t) 782 CSAN_BUS_READ_PTR_FUNC(multi_stream, 4, uint32_t) 783 CSAN_BUS_READ_PTR_FUNC(region, 4, uint32_t) 784 CSAN_BUS_READ_PTR_FUNC(region_stream, 4, uint32_t) 785 786 CSAN_BUS_READ_FUNC(, 8, uint64_t) 787 #if defined(__aarch64__) 788 CSAN_BUS_READ_FUNC(_stream, 8, uint64_t) 789 CSAN_BUS_READ_PTR_FUNC(multi, 8, uint64_t) 790 CSAN_BUS_READ_PTR_FUNC(multi_stream, 8, uint64_t) 791 CSAN_BUS_READ_PTR_FUNC(region, 8, uint64_t) 792 CSAN_BUS_READ_PTR_FUNC(region_stream, 8, uint64_t) 793 #endif 794 795 #define CSAN_BUS_WRITE_FUNC(func, width, type) \ 796 void kcsan_bus_space_write##func##_##width(bus_space_tag_t tag, \ 797 bus_space_handle_t hnd, bus_size_t offset, type value) \ 798 { \ 799 bus_space_write##func##_##width(tag, hnd, offset, value); \ 800 } \ 801 802 #define CSAN_BUS_WRITE_PTR_FUNC(func, width, type) \ 803 void kcsan_bus_space_write_##func##_##width(bus_space_tag_t tag, \ 804 bus_space_handle_t hnd, bus_size_t size, const type *buf, \ 805 bus_size_t count) \ 806 { \ 807 kcsan_access((uintptr_t)buf, sizeof(type) * count, \ 808 true, false, __RET_ADDR); \ 809 bus_space_write_##func##_##width(tag, hnd, size, buf, \ 810 count); \ 811 } 812 813 CSAN_BUS_WRITE_FUNC(, 1, uint8_t) 814 CSAN_BUS_WRITE_FUNC(_stream, 1, uint8_t) 815 CSAN_BUS_WRITE_PTR_FUNC(multi, 1, uint8_t) 816 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 1, uint8_t) 817 CSAN_BUS_WRITE_PTR_FUNC(region, 1, uint8_t) 818 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 1, uint8_t) 819 820 CSAN_BUS_WRITE_FUNC(, 2, uint16_t) 821 CSAN_BUS_WRITE_FUNC(_stream, 2, uint16_t) 822 CSAN_BUS_WRITE_PTR_FUNC(multi, 2, uint16_t) 823 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 2, uint16_t) 824 CSAN_BUS_WRITE_PTR_FUNC(region, 2, uint16_t) 825 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 2, uint16_t) 826 827 CSAN_BUS_WRITE_FUNC(, 4, uint32_t) 828 CSAN_BUS_WRITE_FUNC(_stream, 4, uint32_t) 829 CSAN_BUS_WRITE_PTR_FUNC(multi, 4, uint32_t) 830 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 4, uint32_t) 831 CSAN_BUS_WRITE_PTR_FUNC(region, 4, uint32_t) 832 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 4, uint32_t) 833 834 CSAN_BUS_WRITE_FUNC(, 8, uint64_t) 835 #if defined(__aarch64__) 836 CSAN_BUS_WRITE_FUNC(_stream, 8, uint64_t) 837 CSAN_BUS_WRITE_PTR_FUNC(multi, 8, uint64_t) 838 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 8, uint64_t) 839 CSAN_BUS_WRITE_PTR_FUNC(region, 8, uint64_t) 840 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 8, uint64_t) 841 #endif 842 843 #define CSAN_BUS_SET_FUNC(func, width, type) \ 844 void kcsan_bus_space_set_##func##_##width(bus_space_tag_t tag, \ 845 bus_space_handle_t hnd, bus_size_t offset, type value, \ 846 bus_size_t count) \ 847 { \ 848 bus_space_set_##func##_##width(tag, hnd, offset, value, \ 849 count); \ 850 } 851 852 CSAN_BUS_SET_FUNC(multi, 1, uint8_t) 853 CSAN_BUS_SET_FUNC(region, 1, uint8_t) 854 #if !defined(__aarch64__) 855 CSAN_BUS_SET_FUNC(multi_stream, 1, uint8_t) 856 CSAN_BUS_SET_FUNC(region_stream, 1, uint8_t) 857 #endif 858 859 CSAN_BUS_SET_FUNC(multi, 2, uint16_t) 860 CSAN_BUS_SET_FUNC(region, 2, uint16_t) 861 #if !defined(__aarch64__) 862 CSAN_BUS_SET_FUNC(multi_stream, 2, uint16_t) 863 CSAN_BUS_SET_FUNC(region_stream, 2, uint16_t) 864 #endif 865 866 CSAN_BUS_SET_FUNC(multi, 4, uint32_t) 867 CSAN_BUS_SET_FUNC(region, 4, uint32_t) 868 #if !defined(__aarch64__) 869 CSAN_BUS_SET_FUNC(multi_stream, 4, uint32_t) 870 CSAN_BUS_SET_FUNC(region_stream, 4, uint32_t) 871 #endif 872 873 #if !defined(__amd64__) 874 CSAN_BUS_SET_FUNC(multi, 8, uint64_t) 875 CSAN_BUS_SET_FUNC(region, 8, uint64_t) 876 #if !defined(__aarch64__) 877 CSAN_BUS_SET_FUNC(multi_stream, 8, uint64_t) 878 CSAN_BUS_SET_FUNC(region_stream, 8, uint64_t) 879 #endif 880 #endif 881 882 #define CSAN_BUS_PEEK_FUNC(width, type) \ 883 int kcsan_bus_space_peek_##width(bus_space_tag_t tag, \ 884 bus_space_handle_t hnd, bus_size_t offset, type *value) \ 885 { \ 886 kcsan_access((uintptr_t)value, sizeof(type), true, false, \ 887 __RET_ADDR); \ 888 return (bus_space_peek_##width(tag, hnd, offset, value)); \ 889 } 890 891 CSAN_BUS_PEEK_FUNC(1, uint8_t) 892 CSAN_BUS_PEEK_FUNC(2, uint16_t) 893 CSAN_BUS_PEEK_FUNC(4, uint32_t) 894 #if !defined(__i386__) 895 CSAN_BUS_PEEK_FUNC(8, uint64_t) 896 #endif 897 898 #define CSAN_BUS_POKE_FUNC(width, type) \ 899 int kcsan_bus_space_poke_##width(bus_space_tag_t tag, \ 900 bus_space_handle_t hnd, bus_size_t offset, type value) \ 901 { \ 902 return (bus_space_poke_##width(tag, hnd, offset, value)); \ 903 } 904 905 CSAN_BUS_POKE_FUNC(1, uint8_t) 906 CSAN_BUS_POKE_FUNC(2, uint16_t) 907 CSAN_BUS_POKE_FUNC(4, uint32_t) 908 #if !defined(__i386__) 909 CSAN_BUS_POKE_FUNC(8, uint64_t) 910 #endif 911