1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ARCH_POWERPC_UACCESS_H 3 #define _ARCH_POWERPC_UACCESS_H 4 5 #include <linux/sizes.h> 6 7 #include <asm/processor.h> 8 #include <asm/page.h> 9 #include <asm/extable.h> 10 #include <asm/kup.h> 11 #include <asm/asm-compat.h> 12 13 #ifdef __powerpc64__ 14 /* We use TASK_SIZE_USER64 as TASK_SIZE is not constant */ 15 #define TASK_SIZE_MAX TASK_SIZE_USER64 16 #endif 17 18 /* Threshold above which VMX copy path is used */ 19 #define VMX_COPY_THRESHOLD 3328 20 21 #define __access_ok __access_ok 22 23 #include <asm-generic/access_ok.h> 24 25 /* 26 * On powerpc64, TASK_SIZE_MAX is 0x0010000000000000 then even if both ptr and size 27 * are TASK_SIZE_MAX we are still inside the memory gap. So make it simple. 28 */ 29 static __always_inline int __access_ok(const void __user *ptr, unsigned long size) 30 { 31 unsigned long addr = (unsigned long)ptr; 32 33 if (IS_ENABLED(CONFIG_PPC64)) { 34 BUILD_BUG_ON(!is_power_of_2(TASK_SIZE_MAX)); 35 BUILD_BUG_ON(TASK_SIZE_MAX > 0x0010000000000000); 36 37 if (statically_true(size > TASK_SIZE_MAX)) 38 return false; 39 if (statically_true(size <= TASK_SIZE_MAX)) 40 return !(addr & ~(TASK_SIZE_MAX - 1)); 41 return !((size | addr) & ~(TASK_SIZE_MAX - 1)); 42 } else { 43 if (statically_true(size <= SZ_128K)) 44 return addr < TASK_SIZE; 45 return size <= TASK_SIZE && addr <= TASK_SIZE - size; 46 } 47 } 48 49 /* 50 * These are the main single-value transfer routines. They automatically 51 * use the right size if we just have the right pointer type. 52 * 53 * This gets kind of ugly. We want to return _two_ values in "get_user()" 54 * and yet we don't want to do any pointers, because that is too much 55 * of a performance impact. Thus we have a few rather ugly macros here, 56 * and hide all the ugliness from the user. 57 * 58 * The "__xxx" versions of the user access functions are versions that 59 * do not verify the address space, that must have been done previously 60 * with a separate "access_ok()" call (this is used when we do multiple 61 * accesses to the same area of user memory). 62 * 63 * As we use the same address space for kernel and user data on the 64 * PowerPC, we can just do these as direct assignments. (Of course, the 65 * exception handling means that it's no longer "just"...) 66 * 67 */ 68 #define __put_user(x, ptr) \ 69 ({ \ 70 long __pu_err; \ 71 __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ 72 __typeof__(*(ptr)) __pu_val = (__typeof__(*(ptr)))(x); \ 73 __typeof__(sizeof(*(ptr))) __pu_size = sizeof(*(ptr)); \ 74 \ 75 might_fault(); \ 76 do { \ 77 __label__ __pu_failed; \ 78 \ 79 allow_user_access(__pu_addr, KUAP_WRITE); \ 80 __put_user_size_goto(__pu_val, __pu_addr, __pu_size, __pu_failed); \ 81 prevent_user_access(KUAP_WRITE); \ 82 __pu_err = 0; \ 83 break; \ 84 \ 85 __pu_failed: \ 86 prevent_user_access(KUAP_WRITE); \ 87 __pu_err = -EFAULT; \ 88 } while (0); \ 89 \ 90 __pu_err; \ 91 }) 92 93 #define put_user(x, ptr) \ 94 ({ \ 95 __typeof__(*(ptr)) __user *_pu_addr = (ptr); \ 96 \ 97 access_ok(_pu_addr, sizeof(*(ptr))) ? \ 98 __put_user(x, _pu_addr) : -EFAULT; \ 99 }) 100 101 /* 102 * We don't tell gcc that we are accessing memory, but this is OK 103 * because we do not write to any memory gcc knows about, so there 104 * are no aliasing issues. 105 */ 106 /* -mprefixed can generate offsets beyond range, fall back hack */ 107 #ifdef CONFIG_PPC_KERNEL_PREFIXED 108 #define __put_user_asm_goto(x, addr, label, op) \ 109 asm goto( \ 110 "1: " op " %0,0(%1) # put_user\n" \ 111 EX_TABLE(1b, %l2) \ 112 : \ 113 : "r" (x), "b" (addr) \ 114 : \ 115 : label) 116 #else 117 #define __put_user_asm_goto(x, addr, label, op) \ 118 asm goto( \ 119 "1: " op "%U1%X1 %0,%1 # put_user\n" \ 120 EX_TABLE(1b, %l2) \ 121 : \ 122 : "r" (x), "m<>" (*addr) \ 123 : \ 124 : label) 125 #endif 126 127 #ifdef __powerpc64__ 128 #ifdef CONFIG_PPC_KERNEL_PREFIXED 129 #define __put_user_asm2_goto(x, ptr, label) \ 130 __put_user_asm_goto(x, ptr, label, "std") 131 #else 132 #define __put_user_asm2_goto(x, addr, label) \ 133 asm goto ("1: std%U1%X1 %0,%1 # put_user\n" \ 134 EX_TABLE(1b, %l2) \ 135 : \ 136 : "r" (x), DS_FORM_CONSTRAINT (*addr) \ 137 : \ 138 : label) 139 #endif // CONFIG_PPC_KERNEL_PREFIXED 140 #else /* __powerpc64__ */ 141 #define __put_user_asm2_goto(x, addr, label) \ 142 asm goto( \ 143 "1: stw%X1 %0, %1\n" \ 144 "2: stw%X1 %L0, %L1\n" \ 145 EX_TABLE(1b, %l2) \ 146 EX_TABLE(2b, %l2) \ 147 : \ 148 : "r" (x), "m" (*addr) \ 149 : \ 150 : label) 151 #endif /* __powerpc64__ */ 152 153 #define __put_user_size_goto(x, ptr, size, label) \ 154 do { \ 155 __typeof__(*(ptr)) __user *__pus_addr = (ptr); \ 156 \ 157 switch (size) { \ 158 case 1: __put_user_asm_goto(x, __pus_addr, label, "stb"); break; \ 159 case 2: __put_user_asm_goto(x, __pus_addr, label, "sth"); break; \ 160 case 4: __put_user_asm_goto(x, __pus_addr, label, "stw"); break; \ 161 case 8: __put_user_asm2_goto(x, __pus_addr, label); break; \ 162 default: BUILD_BUG(); \ 163 } \ 164 } while (0) 165 166 /* 167 * This does an atomic 128 byte aligned load from userspace. 168 * Upto caller to do enable_kernel_vmx() before calling! 169 */ 170 #define __get_user_atomic_128_aligned(kaddr, uaddr, err) \ 171 __asm__ __volatile__( \ 172 ".machine push\n" \ 173 ".machine altivec\n" \ 174 "1: lvx 0,0,%1 # get user\n" \ 175 " stvx 0,0,%2 # put kernel\n" \ 176 ".machine pop\n" \ 177 "2:\n" \ 178 ".section .fixup,\"ax\"\n" \ 179 "3: li %0,%3\n" \ 180 " b 2b\n" \ 181 ".previous\n" \ 182 EX_TABLE(1b, 3b) \ 183 : "=r" (err) \ 184 : "b" (uaddr), "b" (kaddr), "i" (-EFAULT), "0" (err)) 185 186 #ifdef CONFIG_CC_HAS_ASM_GOTO_OUTPUT 187 188 /* -mprefixed can generate offsets beyond range, fall back hack */ 189 #ifdef CONFIG_PPC_KERNEL_PREFIXED 190 #define __get_user_asm_goto(x, addr, label, op) \ 191 asm_goto_output( \ 192 "1: "op" %0,0(%1) # get_user\n" \ 193 EX_TABLE(1b, %l2) \ 194 : "=r" (x) \ 195 : "b" (addr) \ 196 : \ 197 : label) 198 #else 199 #define __get_user_asm_goto(x, addr, label, op) \ 200 asm_goto_output( \ 201 "1: "op"%U1%X1 %0, %1 # get_user\n" \ 202 EX_TABLE(1b, %l2) \ 203 : "=r" (x) \ 204 : "m<>" (*addr) \ 205 : \ 206 : label) 207 #endif 208 209 #ifdef __powerpc64__ 210 #ifdef CONFIG_PPC_KERNEL_PREFIXED 211 #define __get_user_asm2_goto(x, addr, label) \ 212 __get_user_asm_goto(x, addr, label, "ld") 213 #else 214 #define __get_user_asm2_goto(x, addr, label) \ 215 asm_goto_output( \ 216 "1: ld%U1%X1 %0, %1 # get_user\n" \ 217 EX_TABLE(1b, %l2) \ 218 : "=r" (x) \ 219 : DS_FORM_CONSTRAINT (*addr) \ 220 : \ 221 : label) 222 #endif // CONFIG_PPC_KERNEL_PREFIXED 223 #else /* __powerpc64__ */ 224 #define __get_user_asm2_goto(x, addr, label) \ 225 asm_goto_output( \ 226 "1: lwz%X1 %0, %1\n" \ 227 "2: lwz%X1 %L0, %L1\n" \ 228 EX_TABLE(1b, %l2) \ 229 EX_TABLE(2b, %l2) \ 230 : "=&r" (x) \ 231 : "m" (*addr) \ 232 : \ 233 : label) 234 #endif /* __powerpc64__ */ 235 236 #define __get_user_size_goto(x, ptr, size, label) \ 237 do { \ 238 BUILD_BUG_ON(size > sizeof(x)); \ 239 switch (size) { \ 240 case 1: __get_user_asm_goto(x, (u8 __user *)ptr, label, "lbz"); break; \ 241 case 2: __get_user_asm_goto(x, (u16 __user *)ptr, label, "lhz"); break; \ 242 case 4: __get_user_asm_goto(x, (u32 __user *)ptr, label, "lwz"); break; \ 243 case 8: __get_user_asm2_goto(x, (u64 __user *)ptr, label); break; \ 244 default: x = 0; BUILD_BUG(); \ 245 } \ 246 } while (0) 247 248 #define __get_user_size_allowed(x, ptr, size, retval) \ 249 do { \ 250 __label__ __gus_failed; \ 251 \ 252 __get_user_size_goto(x, ptr, size, __gus_failed); \ 253 retval = 0; \ 254 break; \ 255 __gus_failed: \ 256 x = 0; \ 257 retval = -EFAULT; \ 258 } while (0) 259 260 #else /* CONFIG_CC_HAS_ASM_GOTO_OUTPUT */ 261 262 #define __get_user_asm(x, addr, err, op) \ 263 __asm__ __volatile__( \ 264 "1: "op"%U2%X2 %1, %2 # get_user\n" \ 265 "2:\n" \ 266 ".section .fixup,\"ax\"\n" \ 267 "3: li %0,%3\n" \ 268 " li %1,0\n" \ 269 " b 2b\n" \ 270 ".previous\n" \ 271 EX_TABLE(1b, 3b) \ 272 : "=r" (err), "=r" (x) \ 273 : "m<>" (*addr), "i" (-EFAULT), "0" (err)) 274 275 #ifdef __powerpc64__ 276 #define __get_user_asm2(x, addr, err) \ 277 __get_user_asm(x, addr, err, "ld") 278 #else /* __powerpc64__ */ 279 #define __get_user_asm2(x, addr, err) \ 280 __asm__ __volatile__( \ 281 "1: lwz%X2 %1, %2\n" \ 282 "2: lwz%X2 %L1, %L2\n" \ 283 "3:\n" \ 284 ".section .fixup,\"ax\"\n" \ 285 "4: li %0,%3\n" \ 286 " li %1,0\n" \ 287 " li %L1,0\n" \ 288 " b 3b\n" \ 289 ".previous\n" \ 290 EX_TABLE(1b, 4b) \ 291 EX_TABLE(2b, 4b) \ 292 : "=r" (err), "=&r" (x) \ 293 : "m" (*addr), "i" (-EFAULT), "0" (err)) 294 #endif /* __powerpc64__ */ 295 296 #define __get_user_size_allowed(x, ptr, size, retval) \ 297 do { \ 298 retval = 0; \ 299 BUILD_BUG_ON(size > sizeof(x)); \ 300 switch (size) { \ 301 case 1: __get_user_asm(x, (u8 __user *)ptr, retval, "lbz"); break; \ 302 case 2: __get_user_asm(x, (u16 __user *)ptr, retval, "lhz"); break; \ 303 case 4: __get_user_asm(x, (u32 __user *)ptr, retval, "lwz"); break; \ 304 case 8: __get_user_asm2(x, (u64 __user *)ptr, retval); break; \ 305 default: x = 0; BUILD_BUG(); \ 306 } \ 307 } while (0) 308 309 #define __get_user_size_goto(x, ptr, size, label) \ 310 do { \ 311 long __gus_retval; \ 312 \ 313 __get_user_size_allowed(x, ptr, size, __gus_retval); \ 314 if (__gus_retval) \ 315 goto label; \ 316 } while (0) 317 318 #endif /* CONFIG_CC_HAS_ASM_GOTO_OUTPUT */ 319 320 /* 321 * This is a type: either unsigned long, if the argument fits into 322 * that type, or otherwise unsigned long long. 323 */ 324 #define __long_type(x) \ 325 __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL)) 326 327 #define __get_user(x, ptr) \ 328 ({ \ 329 long __gu_err; \ 330 __long_type(*(ptr)) __gu_val; \ 331 __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ 332 __typeof__(sizeof(*(ptr))) __gu_size = sizeof(*(ptr)); \ 333 \ 334 might_fault(); \ 335 barrier_nospec(); \ 336 allow_user_access(NULL, KUAP_READ); \ 337 __get_user_size_allowed(__gu_val, __gu_addr, __gu_size, __gu_err); \ 338 prevent_user_access(KUAP_READ); \ 339 (x) = (__typeof__(*(ptr)))__gu_val; \ 340 \ 341 __gu_err; \ 342 }) 343 344 #define get_user(x, ptr) \ 345 ({ \ 346 __typeof__(*(ptr)) __user *_gu_addr = (ptr); \ 347 \ 348 access_ok(_gu_addr, sizeof(*(ptr))) ? \ 349 __get_user(x, _gu_addr) : \ 350 ((x) = (__force __typeof__(*(ptr)))0, -EFAULT); \ 351 }) 352 353 /* more complex routines */ 354 355 extern unsigned long __copy_tofrom_user(void __user *to, 356 const void __user *from, unsigned long size); 357 358 unsigned long __copy_tofrom_user_base(void __user *to, 359 const void __user *from, unsigned long size); 360 361 unsigned long __copy_tofrom_user_power7_vmx(void __user *to, 362 const void __user *from, unsigned long size); 363 364 static __always_inline bool will_use_vmx(unsigned long n) 365 { 366 return IS_ENABLED(CONFIG_ALTIVEC) && cpu_has_feature(CPU_FTR_VMX_COPY) && 367 n > VMX_COPY_THRESHOLD; 368 } 369 370 static __always_inline unsigned long 371 raw_copy_tofrom_user(void __user *to, const void __user *from, 372 unsigned long n, unsigned long dir) 373 { 374 unsigned long ret; 375 376 if (will_use_vmx(n) && enter_vmx_usercopy()) { 377 allow_user_access(to, dir); 378 ret = __copy_tofrom_user_power7_vmx(to, from, n); 379 prevent_user_access(dir); 380 exit_vmx_usercopy(); 381 382 if (unlikely(ret)) { 383 allow_user_access(to, dir); 384 ret = __copy_tofrom_user_base(to, from, n); 385 prevent_user_access(dir); 386 } 387 return ret; 388 } 389 390 allow_user_access(to, dir); 391 ret = __copy_tofrom_user(to, from, n); 392 prevent_user_access(dir); 393 return ret; 394 } 395 396 #ifdef CONFIG_PPC64 397 static inline unsigned long 398 raw_copy_in_user(void __user *to, const void __user *from, unsigned long n) 399 { 400 barrier_nospec(); 401 return raw_copy_tofrom_user(to, from, n, KUAP_READ_WRITE); 402 } 403 #endif /* CONFIG_PPC64 */ 404 405 static inline unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n) 406 { 407 return raw_copy_tofrom_user((__force void __user *)to, from, n, KUAP_READ); 408 } 409 410 static inline unsigned long 411 raw_copy_to_user(void __user *to, const void *from, unsigned long n) 412 { 413 return raw_copy_tofrom_user(to, (__force const void __user *)from, n, KUAP_WRITE); 414 } 415 416 unsigned long __arch_clear_user(void __user *addr, unsigned long size); 417 418 static inline unsigned long __clear_user(void __user *addr, unsigned long size) 419 { 420 unsigned long ret; 421 422 might_fault(); 423 allow_user_access(addr, KUAP_WRITE); 424 ret = __arch_clear_user(addr, size); 425 prevent_user_access(KUAP_WRITE); 426 return ret; 427 } 428 429 static inline unsigned long clear_user(void __user *addr, unsigned long size) 430 { 431 return likely(access_ok(addr, size)) ? __clear_user(addr, size) : size; 432 } 433 434 extern long strncpy_from_user(char *dst, const char __user *src, long count); 435 extern __must_check long strnlen_user(const char __user *str, long n); 436 437 #ifdef CONFIG_ARCH_HAS_COPY_MC 438 unsigned long __must_check 439 copy_mc_generic(void *to, const void *from, unsigned long size); 440 441 static inline unsigned long __must_check 442 copy_mc_to_kernel(void *to, const void *from, unsigned long size) 443 { 444 return copy_mc_generic(to, from, size); 445 } 446 #define copy_mc_to_kernel copy_mc_to_kernel 447 448 static inline unsigned long __must_check 449 copy_mc_to_user(void __user *to, const void *from, unsigned long n) 450 { 451 if (check_copy_size(from, n, true)) { 452 if (access_ok(to, n)) { 453 allow_user_access(to, KUAP_WRITE); 454 n = copy_mc_generic((void __force *)to, from, n); 455 prevent_user_access(KUAP_WRITE); 456 } 457 } 458 459 return n; 460 } 461 #endif 462 463 extern size_t copy_from_user_flushcache(void *dst, const void __user *src, size_t size); 464 465 static __must_check __always_inline bool __user_access_begin(const void __user *ptr, size_t len, 466 unsigned long dir) 467 { 468 if (unlikely(!access_ok(ptr, len))) 469 return false; 470 471 might_fault(); 472 473 if (dir & KUAP_READ) 474 barrier_nospec(); 475 allow_user_access((void __user *)ptr, dir); 476 return true; 477 } 478 479 #define user_access_begin(p, l) __user_access_begin(p, l, KUAP_READ_WRITE) 480 #define user_read_access_begin(p, l) __user_access_begin(p, l, KUAP_READ) 481 #define user_write_access_begin(p, l) __user_access_begin(p, l, KUAP_WRITE) 482 483 #define user_access_end() prevent_user_access(KUAP_READ_WRITE) 484 #define user_read_access_end() prevent_user_access(KUAP_READ) 485 #define user_write_access_end() prevent_user_access(KUAP_WRITE) 486 487 #define user_access_save prevent_user_access_return 488 #define user_access_restore restore_user_access 489 490 /* 491 * Masking the user address is an alternative to a conditional 492 * user_access_begin that can avoid the fencing. This only works 493 * for dense accesses starting at the address. 494 */ 495 static inline void __user *mask_user_address_simple(const void __user *ptr) 496 { 497 unsigned long addr = (unsigned long)ptr; 498 unsigned long mask = (unsigned long)(((long)addr >> (BITS_PER_LONG - 1)) & LONG_MAX); 499 500 return (void __user *)(addr & ~mask); 501 } 502 503 static inline void __user *mask_user_address_isel(const void __user *ptr) 504 { 505 unsigned long addr; 506 507 asm("cmplw %1, %2; iselgt %0, %2, %1" : "=r"(addr) : "r"(ptr), "r"(TASK_SIZE) : "cr0"); 508 509 return (void __user *)addr; 510 } 511 512 /* TASK_SIZE is a multiple of 128K for shifting by 17 to the right */ 513 static inline void __user *mask_user_address_32(const void __user *ptr) 514 { 515 unsigned long addr = (unsigned long)ptr; 516 unsigned long mask = (unsigned long)((long)((TASK_SIZE >> 17) - 1 - (addr >> 17)) >> 31); 517 518 addr = (addr & ~mask) | (TASK_SIZE & mask); 519 520 return (void __user *)addr; 521 } 522 523 static inline void __user *mask_user_address_fallback(const void __user *ptr) 524 { 525 unsigned long addr = (unsigned long)ptr; 526 527 return (void __user *)(likely(addr < TASK_SIZE) ? addr : TASK_SIZE); 528 } 529 530 static inline void __user *mask_user_address(const void __user *ptr) 531 { 532 #ifdef MODULES_VADDR 533 const unsigned long border = MODULES_VADDR; 534 #else 535 const unsigned long border = PAGE_OFFSET; 536 #endif 537 538 if (IS_ENABLED(CONFIG_PPC64)) 539 return mask_user_address_simple(ptr); 540 if (IS_ENABLED(CONFIG_E500)) 541 return mask_user_address_isel(ptr); 542 if (TASK_SIZE <= UL(SZ_2G) && border >= UL(SZ_2G)) 543 return mask_user_address_simple(ptr); 544 if (IS_ENABLED(CONFIG_PPC_BARRIER_NOSPEC)) 545 return mask_user_address_32(ptr); 546 return mask_user_address_fallback(ptr); 547 } 548 549 static __always_inline void __user *__masked_user_access_begin(const void __user *p, 550 unsigned long dir) 551 { 552 void __user *ptr = mask_user_address(p); 553 554 might_fault(); 555 allow_user_access(ptr, dir); 556 557 return ptr; 558 } 559 560 #define masked_user_access_begin(p) __masked_user_access_begin(p, KUAP_READ_WRITE) 561 #define masked_user_read_access_begin(p) __masked_user_access_begin(p, KUAP_READ) 562 #define masked_user_write_access_begin(p) __masked_user_access_begin(p, KUAP_WRITE) 563 564 #define arch_unsafe_get_user(x, p, e) do { \ 565 __long_type(*(p)) __gu_val; \ 566 __typeof__(*(p)) __user *__gu_addr = (p); \ 567 \ 568 __get_user_size_goto(__gu_val, __gu_addr, sizeof(*(p)), e); \ 569 (x) = (__typeof__(*(p)))__gu_val; \ 570 } while (0) 571 572 #define arch_unsafe_put_user(x, p, e) \ 573 __put_user_size_goto((__typeof__(*(p)))(x), (p), sizeof(*(p)), e) 574 575 #define unsafe_copy_from_user(d, s, l, e) \ 576 do { \ 577 u8 *_dst = (u8 *)(d); \ 578 const u8 __user *_src = (const u8 __user *)(s); \ 579 size_t _len = (l); \ 580 int _i; \ 581 \ 582 for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64)) \ 583 unsafe_get_user(*(u64 *)(_dst + _i), (u64 __user *)(_src + _i), e); \ 584 if (_len & 4) { \ 585 unsafe_get_user(*(u32 *)(_dst + _i), (u32 __user *)(_src + _i), e); \ 586 _i += 4; \ 587 } \ 588 if (_len & 2) { \ 589 unsafe_get_user(*(u16 *)(_dst + _i), (u16 __user *)(_src + _i), e); \ 590 _i += 2; \ 591 } \ 592 if (_len & 1) \ 593 unsafe_get_user(*(u8 *)(_dst + _i), (u8 __user *)(_src + _i), e); \ 594 } while (0) 595 596 #define unsafe_copy_to_user(d, s, l, e) \ 597 do { \ 598 u8 __user *_dst = (u8 __user *)(d); \ 599 const u8 *_src = (const u8 *)(s); \ 600 size_t _len = (l); \ 601 int _i; \ 602 \ 603 for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64)) \ 604 unsafe_put_user(*(u64 *)(_src + _i), (u64 __user *)(_dst + _i), e); \ 605 if (_len & 4) { \ 606 unsafe_put_user(*(u32*)(_src + _i), (u32 __user *)(_dst + _i), e); \ 607 _i += 4; \ 608 } \ 609 if (_len & 2) { \ 610 unsafe_put_user(*(u16*)(_src + _i), (u16 __user *)(_dst + _i), e); \ 611 _i += 2; \ 612 } \ 613 if (_len & 1) \ 614 unsafe_put_user(*(u8*)(_src + _i), (u8 __user *)(_dst + _i), e); \ 615 } while (0) 616 617 #define arch_get_kernel_nofault(dst, src, type, err_label) \ 618 __get_user_size_goto(*((type *)(dst)), \ 619 (__force type __user *)(src), sizeof(type), err_label) 620 621 #define arch_put_kernel_nofault(dst, src, type, err_label) \ 622 __put_user_size_goto(*((type *)(src)), \ 623 (__force type __user *)(dst), sizeof(type), err_label) 624 625 #endif /* _ARCH_POWERPC_UACCESS_H */ 626