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 CSAN_ATOMIC_FUNC_LOAD(16, uint16_t) 558 CSAN_ATOMIC_FUNC_SET(16, uint16_t) 559 CSAN_ATOMIC_FUNC_SUBTRACT(16, uint16_t) 560 _CSAN_ATOMIC_FUNC_STORE(16, uint16_t) 561 #if 0 562 CSAN_ATOMIC_FUNC_FETCHADD(16, uint16_t) 563 CSAN_ATOMIC_FUNC_READANDCLEAR(16, uint16_t) 564 CSAN_ATOMIC_FUNC_SWAP(16, uint16_t) 565 CSAN_ATOMIC_FUNC_TESTANDCLEAR(16, uint16_t) 566 CSAN_ATOMIC_FUNC_TESTANDSET(16, uint16_t) 567 #endif 568 569 CSAN_ATOMIC_FUNC_ADD(32, uint32_t) 570 CSAN_ATOMIC_FUNC_CLEAR(32, uint32_t) 571 CSAN_ATOMIC_FUNC_CMPSET(32, uint32_t) 572 CSAN_ATOMIC_FUNC_FCMPSET(32, uint32_t) 573 CSAN_ATOMIC_FUNC_FETCHADD(32, uint32_t) 574 CSAN_ATOMIC_FUNC_LOAD(32, uint32_t) 575 CSAN_ATOMIC_FUNC_READANDCLEAR(32, uint32_t) 576 CSAN_ATOMIC_FUNC_SET(32, uint32_t) 577 CSAN_ATOMIC_FUNC_SUBTRACT(32, uint32_t) 578 CSAN_ATOMIC_FUNC_STORE(32, uint32_t) 579 CSAN_ATOMIC_FUNC_SWAP(32, uint32_t) 580 #if !defined(__aarch64__) 581 CSAN_ATOMIC_FUNC_TESTANDCLEAR(32, uint32_t) 582 CSAN_ATOMIC_FUNC_TESTANDSET(32, uint32_t) 583 #endif 584 585 CSAN_ATOMIC_FUNC_ADD(64, uint64_t) 586 CSAN_ATOMIC_FUNC_CLEAR(64, uint64_t) 587 CSAN_ATOMIC_FUNC_CMPSET(64, uint64_t) 588 CSAN_ATOMIC_FUNC_FCMPSET(64, uint64_t) 589 CSAN_ATOMIC_FUNC_FETCHADD(64, uint64_t) 590 CSAN_ATOMIC_FUNC_LOAD(64, uint64_t) 591 CSAN_ATOMIC_FUNC_READANDCLEAR(64, uint64_t) 592 CSAN_ATOMIC_FUNC_SET(64, uint64_t) 593 CSAN_ATOMIC_FUNC_SUBTRACT(64, uint64_t) 594 CSAN_ATOMIC_FUNC_STORE(64, uint64_t) 595 CSAN_ATOMIC_FUNC_SWAP(64, uint64_t) 596 #if !defined(__aarch64__) 597 CSAN_ATOMIC_FUNC_TESTANDCLEAR(64, uint64_t) 598 CSAN_ATOMIC_FUNC_TESTANDSET(64, uint64_t) 599 #endif 600 601 CSAN_ATOMIC_FUNC_ADD(int, u_int) 602 CSAN_ATOMIC_FUNC_CLEAR(int, u_int) 603 CSAN_ATOMIC_FUNC_CMPSET(int, u_int) 604 CSAN_ATOMIC_FUNC_FCMPSET(int, u_int) 605 CSAN_ATOMIC_FUNC_FETCHADD(int, u_int) 606 CSAN_ATOMIC_FUNC_LOAD(int, u_int) 607 CSAN_ATOMIC_FUNC_READANDCLEAR(int, u_int) 608 CSAN_ATOMIC_FUNC_SET(int, u_int) 609 CSAN_ATOMIC_FUNC_SUBTRACT(int, u_int) 610 CSAN_ATOMIC_FUNC_STORE(int, u_int) 611 CSAN_ATOMIC_FUNC_SWAP(int, u_int) 612 #if !defined(__aarch64__) 613 CSAN_ATOMIC_FUNC_TESTANDCLEAR(int, u_int) 614 CSAN_ATOMIC_FUNC_TESTANDSET(int, u_int) 615 #endif 616 617 CSAN_ATOMIC_FUNC_ADD(long, u_long) 618 CSAN_ATOMIC_FUNC_CLEAR(long, u_long) 619 CSAN_ATOMIC_FUNC_CMPSET(long, u_long) 620 CSAN_ATOMIC_FUNC_FCMPSET(long, u_long) 621 CSAN_ATOMIC_FUNC_FETCHADD(long, u_long) 622 CSAN_ATOMIC_FUNC_LOAD(long, u_long) 623 CSAN_ATOMIC_FUNC_READANDCLEAR(long, u_long) 624 CSAN_ATOMIC_FUNC_SET(long, u_long) 625 CSAN_ATOMIC_FUNC_SUBTRACT(long, u_long) 626 CSAN_ATOMIC_FUNC_STORE(long, u_long) 627 CSAN_ATOMIC_FUNC_SWAP(long, u_long) 628 #if !defined(__aarch64__) 629 CSAN_ATOMIC_FUNC_TESTANDCLEAR(long, u_long) 630 CSAN_ATOMIC_FUNC_TESTANDSET(long, u_long) 631 CSAN_ATOMIC_FUNC_TESTANDSET(acq_long, u_long) 632 #endif 633 634 CSAN_ATOMIC_FUNC_ADD(ptr, uintptr_t) 635 CSAN_ATOMIC_FUNC_CLEAR(ptr, uintptr_t) 636 CSAN_ATOMIC_FUNC_CMPSET(ptr, uintptr_t) 637 CSAN_ATOMIC_FUNC_FCMPSET(ptr, uintptr_t) 638 #if !defined(__amd64__) 639 CSAN_ATOMIC_FUNC_FETCHADD(ptr, uintptr_t) 640 #endif 641 CSAN_ATOMIC_FUNC_LOAD(ptr, uintptr_t) 642 CSAN_ATOMIC_FUNC_READANDCLEAR(ptr, uintptr_t) 643 CSAN_ATOMIC_FUNC_SET(ptr, uintptr_t) 644 CSAN_ATOMIC_FUNC_SUBTRACT(ptr, uintptr_t) 645 CSAN_ATOMIC_FUNC_STORE(ptr, uintptr_t) 646 CSAN_ATOMIC_FUNC_SWAP(ptr, uintptr_t) 647 #if 0 648 CSAN_ATOMIC_FUNC_TESTANDCLEAR(ptr, uintptr_t) 649 CSAN_ATOMIC_FUNC_TESTANDSET(ptr, uintptr_t) 650 #endif 651 652 #define CSAN_ATOMIC_FUNC_THREAD_FENCE(name) \ 653 void kcsan_atomic_thread_fence_##name(void) \ 654 { \ 655 atomic_thread_fence_##name(); \ 656 } 657 658 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq) 659 CSAN_ATOMIC_FUNC_THREAD_FENCE(acq_rel) 660 CSAN_ATOMIC_FUNC_THREAD_FENCE(rel) 661 CSAN_ATOMIC_FUNC_THREAD_FENCE(seq_cst) 662 663 /* -------------------------------------------------------------------------- */ 664 665 #include <sys/bus.h> 666 #include <machine/bus.h> 667 #include <sys/_cscan_bus.h> 668 669 int 670 kcsan_bus_space_map(bus_space_tag_t tag, bus_addr_t hnd, bus_size_t size, 671 int flags, bus_space_handle_t *handlep) 672 { 673 674 return (bus_space_map(tag, hnd, size, flags, handlep)); 675 } 676 677 void 678 kcsan_bus_space_unmap(bus_space_tag_t tag, bus_space_handle_t hnd, 679 bus_size_t size) 680 { 681 682 bus_space_unmap(tag, hnd, size); 683 } 684 685 int 686 kcsan_bus_space_subregion(bus_space_tag_t tag, bus_space_handle_t hnd, 687 bus_size_t offset, bus_size_t size, bus_space_handle_t *handlep) 688 { 689 690 return (bus_space_subregion(tag, hnd, offset, size, handlep)); 691 } 692 693 #if !defined(__amd64__) 694 int 695 kcsan_bus_space_alloc(bus_space_tag_t tag, bus_addr_t reg_start, 696 bus_addr_t reg_end, bus_size_t size, bus_size_t alignment, 697 bus_size_t boundary, int flags, bus_addr_t *addrp, 698 bus_space_handle_t *handlep) 699 { 700 701 return (bus_space_alloc(tag, reg_start, reg_end, size, alignment, 702 boundary, flags, addrp, handlep)); 703 } 704 #endif 705 706 void 707 kcsan_bus_space_free(bus_space_tag_t tag, bus_space_handle_t hnd, 708 bus_size_t size) 709 { 710 711 bus_space_free(tag, hnd, size); 712 } 713 714 void 715 kcsan_bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t hnd, 716 bus_size_t offset, bus_size_t size, int flags) 717 { 718 719 bus_space_barrier(tag, hnd, offset, size, flags); 720 } 721 722 #define CSAN_BUS_READ_FUNC(func, width, type) \ 723 type kcsan_bus_space_read##func##_##width(bus_space_tag_t tag, \ 724 bus_space_handle_t hnd, bus_size_t offset) \ 725 { \ 726 return (bus_space_read##func##_##width(tag, hnd, \ 727 offset)); \ 728 } \ 729 730 #define CSAN_BUS_READ_PTR_FUNC(func, width, type) \ 731 void kcsan_bus_space_read_##func##_##width(bus_space_tag_t tag, \ 732 bus_space_handle_t hnd, bus_size_t size, type *buf, \ 733 bus_size_t count) \ 734 { \ 735 kcsan_access((uintptr_t)buf, sizeof(type) * count, \ 736 false, false, __RET_ADDR); \ 737 bus_space_read_##func##_##width(tag, hnd, size, buf, \ 738 count); \ 739 } 740 741 CSAN_BUS_READ_FUNC(, 1, uint8_t) 742 CSAN_BUS_READ_FUNC(_stream, 1, uint8_t) 743 CSAN_BUS_READ_PTR_FUNC(multi, 1, uint8_t) 744 CSAN_BUS_READ_PTR_FUNC(multi_stream, 1, uint8_t) 745 CSAN_BUS_READ_PTR_FUNC(region, 1, uint8_t) 746 CSAN_BUS_READ_PTR_FUNC(region_stream, 1, uint8_t) 747 748 CSAN_BUS_READ_FUNC(, 2, uint16_t) 749 CSAN_BUS_READ_FUNC(_stream, 2, uint16_t) 750 CSAN_BUS_READ_PTR_FUNC(multi, 2, uint16_t) 751 CSAN_BUS_READ_PTR_FUNC(multi_stream, 2, uint16_t) 752 CSAN_BUS_READ_PTR_FUNC(region, 2, uint16_t) 753 CSAN_BUS_READ_PTR_FUNC(region_stream, 2, uint16_t) 754 755 CSAN_BUS_READ_FUNC(, 4, uint32_t) 756 CSAN_BUS_READ_FUNC(_stream, 4, uint32_t) 757 CSAN_BUS_READ_PTR_FUNC(multi, 4, uint32_t) 758 CSAN_BUS_READ_PTR_FUNC(multi_stream, 4, uint32_t) 759 CSAN_BUS_READ_PTR_FUNC(region, 4, uint32_t) 760 CSAN_BUS_READ_PTR_FUNC(region_stream, 4, uint32_t) 761 762 CSAN_BUS_READ_FUNC(, 8, uint64_t) 763 #if defined(__aarch64__) 764 CSAN_BUS_READ_FUNC(_stream, 8, uint64_t) 765 CSAN_BUS_READ_PTR_FUNC(multi, 8, uint64_t) 766 CSAN_BUS_READ_PTR_FUNC(multi_stream, 8, uint64_t) 767 CSAN_BUS_READ_PTR_FUNC(region, 8, uint64_t) 768 CSAN_BUS_READ_PTR_FUNC(region_stream, 8, uint64_t) 769 #endif 770 771 #define CSAN_BUS_WRITE_FUNC(func, width, type) \ 772 void kcsan_bus_space_write##func##_##width(bus_space_tag_t tag, \ 773 bus_space_handle_t hnd, bus_size_t offset, type value) \ 774 { \ 775 bus_space_write##func##_##width(tag, hnd, offset, value); \ 776 } \ 777 778 #define CSAN_BUS_WRITE_PTR_FUNC(func, width, type) \ 779 void kcsan_bus_space_write_##func##_##width(bus_space_tag_t tag, \ 780 bus_space_handle_t hnd, bus_size_t size, const type *buf, \ 781 bus_size_t count) \ 782 { \ 783 kcsan_access((uintptr_t)buf, sizeof(type) * count, \ 784 true, false, __RET_ADDR); \ 785 bus_space_write_##func##_##width(tag, hnd, size, buf, \ 786 count); \ 787 } 788 789 CSAN_BUS_WRITE_FUNC(, 1, uint8_t) 790 CSAN_BUS_WRITE_FUNC(_stream, 1, uint8_t) 791 CSAN_BUS_WRITE_PTR_FUNC(multi, 1, uint8_t) 792 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 1, uint8_t) 793 CSAN_BUS_WRITE_PTR_FUNC(region, 1, uint8_t) 794 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 1, uint8_t) 795 796 CSAN_BUS_WRITE_FUNC(, 2, uint16_t) 797 CSAN_BUS_WRITE_FUNC(_stream, 2, uint16_t) 798 CSAN_BUS_WRITE_PTR_FUNC(multi, 2, uint16_t) 799 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 2, uint16_t) 800 CSAN_BUS_WRITE_PTR_FUNC(region, 2, uint16_t) 801 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 2, uint16_t) 802 803 CSAN_BUS_WRITE_FUNC(, 4, uint32_t) 804 CSAN_BUS_WRITE_FUNC(_stream, 4, uint32_t) 805 CSAN_BUS_WRITE_PTR_FUNC(multi, 4, uint32_t) 806 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 4, uint32_t) 807 CSAN_BUS_WRITE_PTR_FUNC(region, 4, uint32_t) 808 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 4, uint32_t) 809 810 CSAN_BUS_WRITE_FUNC(, 8, uint64_t) 811 #if defined(__aarch64__) 812 CSAN_BUS_WRITE_FUNC(_stream, 8, uint64_t) 813 CSAN_BUS_WRITE_PTR_FUNC(multi, 8, uint64_t) 814 CSAN_BUS_WRITE_PTR_FUNC(multi_stream, 8, uint64_t) 815 CSAN_BUS_WRITE_PTR_FUNC(region, 8, uint64_t) 816 CSAN_BUS_WRITE_PTR_FUNC(region_stream, 8, uint64_t) 817 #endif 818 819 #define CSAN_BUS_SET_FUNC(func, width, type) \ 820 void kcsan_bus_space_set_##func##_##width(bus_space_tag_t tag, \ 821 bus_space_handle_t hnd, bus_size_t offset, type value, \ 822 bus_size_t count) \ 823 { \ 824 bus_space_set_##func##_##width(tag, hnd, offset, value, \ 825 count); \ 826 } 827 828 CSAN_BUS_SET_FUNC(multi, 1, uint8_t) 829 CSAN_BUS_SET_FUNC(region, 1, uint8_t) 830 #if !defined(__aarch64__) 831 CSAN_BUS_SET_FUNC(multi_stream, 1, uint8_t) 832 CSAN_BUS_SET_FUNC(region_stream, 1, uint8_t) 833 #endif 834 835 CSAN_BUS_SET_FUNC(multi, 2, uint16_t) 836 CSAN_BUS_SET_FUNC(region, 2, uint16_t) 837 #if !defined(__aarch64__) 838 CSAN_BUS_SET_FUNC(multi_stream, 2, uint16_t) 839 CSAN_BUS_SET_FUNC(region_stream, 2, uint16_t) 840 #endif 841 842 CSAN_BUS_SET_FUNC(multi, 4, uint32_t) 843 CSAN_BUS_SET_FUNC(region, 4, uint32_t) 844 #if !defined(__aarch64__) 845 CSAN_BUS_SET_FUNC(multi_stream, 4, uint32_t) 846 CSAN_BUS_SET_FUNC(region_stream, 4, uint32_t) 847 #endif 848 849 #if !defined(__amd64__) 850 CSAN_BUS_SET_FUNC(multi, 8, uint64_t) 851 CSAN_BUS_SET_FUNC(region, 8, uint64_t) 852 #if !defined(__aarch64__) 853 CSAN_BUS_SET_FUNC(multi_stream, 8, uint64_t) 854 CSAN_BUS_SET_FUNC(region_stream, 8, uint64_t) 855 #endif 856 #endif 857 858