1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_COMPAT_H 3 #define _LINUX_COMPAT_H 4 /* 5 * These are the type definitions for the architecture specific 6 * syscall compatibility layer. 7 */ 8 9 #include <linux/types.h> 10 #include <linux/time.h> 11 12 #include <linux/stat.h> 13 #include <linux/param.h> /* for HZ */ 14 #include <linux/sem.h> 15 #include <linux/socket.h> 16 #include <linux/if.h> 17 #include <linux/fs.h> 18 #include <linux/aio_abi.h> /* for aio_context_t */ 19 #include <linux/uaccess.h> 20 #include <linux/unistd.h> 21 22 #include <asm/compat.h> 23 #include <asm/siginfo.h> 24 #include <asm/signal.h> 25 26 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 27 /* 28 * It may be useful for an architecture to override the definitions of the 29 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular 30 * to use a different calling convention for syscalls. To allow for that, 31 + the prototypes for the compat_sys_*() functions below will *not* be included 32 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 33 */ 34 #include <asm/syscall_wrapper.h> 35 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 36 37 #ifndef COMPAT_USE_64BIT_TIME 38 #define COMPAT_USE_64BIT_TIME 0 39 #endif 40 41 #ifndef __SC_DELOUSE 42 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) 43 #endif 44 45 #ifndef COMPAT_SYSCALL_DEFINE0 46 #define COMPAT_SYSCALL_DEFINE0(name) \ 47 asmlinkage long compat_sys_##name(void); \ 48 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ 49 asmlinkage long compat_sys_##name(void) 50 #endif /* COMPAT_SYSCALL_DEFINE0 */ 51 52 #define COMPAT_SYSCALL_DEFINE1(name, ...) \ 53 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) 54 #define COMPAT_SYSCALL_DEFINE2(name, ...) \ 55 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) 56 #define COMPAT_SYSCALL_DEFINE3(name, ...) \ 57 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) 58 #define COMPAT_SYSCALL_DEFINE4(name, ...) \ 59 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) 60 #define COMPAT_SYSCALL_DEFINE5(name, ...) \ 61 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) 62 #define COMPAT_SYSCALL_DEFINE6(name, ...) \ 63 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) 64 65 /* 66 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which 67 * sign-extends 32-bit ints to longs whenever needed. The actual work is 68 * done within __do_compat_sys_*(). 69 */ 70 #ifndef COMPAT_SYSCALL_DEFINEx 71 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 72 __diag_push(); \ 73 __diag_ignore(GCC, 8, "-Wattribute-alias", \ 74 "Type aliasing is used to sanitize syscall arguments");\ 75 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 76 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 77 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 78 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 80 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 81 { \ 82 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 83 __MAP(x,__SC_TEST,__VA_ARGS__); \ 84 return ret; \ 85 } \ 86 __diag_pop(); \ 87 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 88 #endif /* COMPAT_SYSCALL_DEFINEx */ 89 90 struct compat_iovec { 91 compat_uptr_t iov_base; 92 compat_size_t iov_len; 93 }; 94 95 #ifndef compat_user_stack_pointer 96 #define compat_user_stack_pointer() current_user_stack_pointer() 97 #endif 98 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 99 typedef struct compat_sigaltstack { 100 compat_uptr_t ss_sp; 101 int ss_flags; 102 compat_size_t ss_size; 103 } compat_stack_t; 104 #endif 105 #ifndef COMPAT_MINSIGSTKSZ 106 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 107 #endif 108 109 #define compat_jiffies_to_clock_t(x) \ 110 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 111 112 typedef __compat_uid32_t compat_uid_t; 113 typedef __compat_gid32_t compat_gid_t; 114 115 struct compat_sel_arg_struct; 116 struct rusage; 117 118 struct old_itimerval32; 119 120 struct compat_tms { 121 compat_clock_t tms_utime; 122 compat_clock_t tms_stime; 123 compat_clock_t tms_cutime; 124 compat_clock_t tms_cstime; 125 }; 126 127 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 128 129 typedef struct { 130 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 131 } compat_sigset_t; 132 133 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 134 size_t sigsetsize); 135 136 struct compat_sigaction { 137 #ifndef __ARCH_HAS_IRIX_SIGACTION 138 compat_uptr_t sa_handler; 139 compat_ulong_t sa_flags; 140 #else 141 compat_uint_t sa_flags; 142 compat_uptr_t sa_handler; 143 #endif 144 #ifdef __ARCH_HAS_SA_RESTORER 145 compat_uptr_t sa_restorer; 146 #endif 147 compat_sigset_t sa_mask __packed; 148 }; 149 150 typedef union compat_sigval { 151 compat_int_t sival_int; 152 compat_uptr_t sival_ptr; 153 } compat_sigval_t; 154 155 typedef struct compat_siginfo { 156 int si_signo; 157 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 158 int si_errno; 159 int si_code; 160 #else 161 int si_code; 162 int si_errno; 163 #endif 164 165 union { 166 int _pad[128/sizeof(int) - 3]; 167 168 /* kill() */ 169 struct { 170 compat_pid_t _pid; /* sender's pid */ 171 __compat_uid32_t _uid; /* sender's uid */ 172 } _kill; 173 174 /* POSIX.1b timers */ 175 struct { 176 compat_timer_t _tid; /* timer id */ 177 int _overrun; /* overrun count */ 178 compat_sigval_t _sigval; /* same as below */ 179 } _timer; 180 181 /* POSIX.1b signals */ 182 struct { 183 compat_pid_t _pid; /* sender's pid */ 184 __compat_uid32_t _uid; /* sender's uid */ 185 compat_sigval_t _sigval; 186 } _rt; 187 188 /* SIGCHLD */ 189 struct { 190 compat_pid_t _pid; /* which child */ 191 __compat_uid32_t _uid; /* sender's uid */ 192 int _status; /* exit code */ 193 compat_clock_t _utime; 194 compat_clock_t _stime; 195 } _sigchld; 196 197 #ifdef CONFIG_X86_X32_ABI 198 /* SIGCHLD (x32 version) */ 199 struct { 200 compat_pid_t _pid; /* which child */ 201 __compat_uid32_t _uid; /* sender's uid */ 202 int _status; /* exit code */ 203 compat_s64 _utime; 204 compat_s64 _stime; 205 } _sigchld_x32; 206 #endif 207 208 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 209 struct { 210 compat_uptr_t _addr; /* faulting insn/memory ref. */ 211 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 212 sizeof(short) : __alignof__(compat_uptr_t)) 213 union { 214 /* used on alpha and sparc */ 215 int _trapno; /* TRAP # which caused the signal */ 216 /* 217 * used when si_code=BUS_MCEERR_AR or 218 * used when si_code=BUS_MCEERR_AO 219 */ 220 short int _addr_lsb; /* Valid LSB of the reported address. */ 221 /* used when si_code=SEGV_BNDERR */ 222 struct { 223 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 224 compat_uptr_t _lower; 225 compat_uptr_t _upper; 226 } _addr_bnd; 227 /* used when si_code=SEGV_PKUERR */ 228 struct { 229 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 230 u32 _pkey; 231 } _addr_pkey; 232 /* used when si_code=TRAP_PERF */ 233 struct { 234 compat_ulong_t _data; 235 u32 _type; 236 u32 _flags; 237 } _perf; 238 }; 239 } _sigfault; 240 241 /* SIGPOLL */ 242 struct { 243 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 244 int _fd; 245 } _sigpoll; 246 247 struct { 248 compat_uptr_t _call_addr; /* calling user insn */ 249 int _syscall; /* triggering system call number */ 250 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 251 } _sigsys; 252 } _sifields; 253 } compat_siginfo_t; 254 255 struct compat_rlimit { 256 compat_ulong_t rlim_cur; 257 compat_ulong_t rlim_max; 258 }; 259 260 #ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED 261 #define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed)) 262 #else 263 #define __ARCH_COMPAT_FLOCK64_PACK 264 #endif 265 266 struct compat_flock { 267 short l_type; 268 short l_whence; 269 compat_off_t l_start; 270 compat_off_t l_len; 271 #ifdef __ARCH_COMPAT_FLOCK_EXTRA_SYSID 272 __ARCH_COMPAT_FLOCK_EXTRA_SYSID 273 #endif 274 compat_pid_t l_pid; 275 #ifdef __ARCH_COMPAT_FLOCK_PAD 276 __ARCH_COMPAT_FLOCK_PAD 277 #endif 278 }; 279 280 struct compat_flock64 { 281 short l_type; 282 short l_whence; 283 compat_loff_t l_start; 284 compat_loff_t l_len; 285 compat_pid_t l_pid; 286 #ifdef __ARCH_COMPAT_FLOCK64_PAD 287 __ARCH_COMPAT_FLOCK64_PAD 288 #endif 289 } __ARCH_COMPAT_FLOCK64_PACK; 290 291 struct compat_rusage { 292 struct old_timeval32 ru_utime; 293 struct old_timeval32 ru_stime; 294 compat_long_t ru_maxrss; 295 compat_long_t ru_ixrss; 296 compat_long_t ru_idrss; 297 compat_long_t ru_isrss; 298 compat_long_t ru_minflt; 299 compat_long_t ru_majflt; 300 compat_long_t ru_nswap; 301 compat_long_t ru_inblock; 302 compat_long_t ru_oublock; 303 compat_long_t ru_msgsnd; 304 compat_long_t ru_msgrcv; 305 compat_long_t ru_nsignals; 306 compat_long_t ru_nvcsw; 307 compat_long_t ru_nivcsw; 308 }; 309 310 extern int put_compat_rusage(const struct rusage *, 311 struct compat_rusage __user *); 312 313 struct compat_siginfo; 314 struct __compat_aio_sigset; 315 316 struct compat_dirent { 317 u32 d_ino; 318 compat_off_t d_off; 319 u16 d_reclen; 320 char d_name[256]; 321 }; 322 323 struct compat_ustat { 324 compat_daddr_t f_tfree; 325 compat_ino_t f_tinode; 326 char f_fname[6]; 327 char f_fpack[6]; 328 }; 329 330 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 331 332 typedef struct compat_sigevent { 333 compat_sigval_t sigev_value; 334 compat_int_t sigev_signo; 335 compat_int_t sigev_notify; 336 union { 337 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 338 compat_int_t _tid; 339 340 struct { 341 compat_uptr_t _function; 342 compat_uptr_t _attribute; 343 } _sigev_thread; 344 } _sigev_un; 345 } compat_sigevent_t; 346 347 struct compat_ifmap { 348 compat_ulong_t mem_start; 349 compat_ulong_t mem_end; 350 unsigned short base_addr; 351 unsigned char irq; 352 unsigned char dma; 353 unsigned char port; 354 }; 355 356 struct compat_if_settings { 357 unsigned int type; /* Type of physical device or protocol */ 358 unsigned int size; /* Size of the data allocated by the caller */ 359 compat_uptr_t ifs_ifsu; /* union of pointers */ 360 }; 361 362 struct compat_ifreq { 363 union { 364 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 365 } ifr_ifrn; 366 union { 367 struct sockaddr ifru_addr; 368 struct sockaddr ifru_dstaddr; 369 struct sockaddr ifru_broadaddr; 370 struct sockaddr ifru_netmask; 371 struct sockaddr ifru_hwaddr; 372 short ifru_flags; 373 compat_int_t ifru_ivalue; 374 compat_int_t ifru_mtu; 375 struct compat_ifmap ifru_map; 376 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 377 char ifru_newname[IFNAMSIZ]; 378 compat_caddr_t ifru_data; 379 struct compat_if_settings ifru_settings; 380 } ifr_ifru; 381 }; 382 383 struct compat_ifconf { 384 compat_int_t ifc_len; /* size of buffer */ 385 compat_caddr_t ifcbuf; 386 }; 387 388 struct compat_robust_list { 389 compat_uptr_t next; 390 }; 391 392 struct compat_robust_list_head { 393 struct compat_robust_list list; 394 compat_long_t futex_offset; 395 compat_uptr_t list_op_pending; 396 }; 397 398 #ifdef CONFIG_COMPAT_OLD_SIGACTION 399 struct compat_old_sigaction { 400 compat_uptr_t sa_handler; 401 compat_old_sigset_t sa_mask; 402 compat_ulong_t sa_flags; 403 compat_uptr_t sa_restorer; 404 }; 405 #endif 406 407 struct compat_keyctl_kdf_params { 408 compat_uptr_t hashname; 409 compat_uptr_t otherinfo; 410 __u32 otherinfolen; 411 __u32 __spare[8]; 412 }; 413 414 struct compat_stat; 415 struct compat_statfs; 416 struct compat_statfs64; 417 struct compat_old_linux_dirent; 418 struct compat_linux_dirent; 419 struct linux_dirent64; 420 struct compat_msghdr; 421 struct compat_mmsghdr; 422 struct compat_sysinfo; 423 struct compat_sysctl_args; 424 struct compat_kexec_segment; 425 struct compat_mq_attr; 426 struct compat_msgbuf; 427 428 void copy_siginfo_to_external32(struct compat_siginfo *to, 429 const struct kernel_siginfo *from); 430 int copy_siginfo_from_user32(kernel_siginfo_t *to, 431 const struct compat_siginfo __user *from); 432 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 433 const kernel_siginfo_t *from); 434 #ifndef copy_siginfo_to_user32 435 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 436 #endif 437 int get_compat_sigevent(struct sigevent *event, 438 const struct compat_sigevent __user *u_event); 439 440 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 441 442 /* 443 * Defined inline such that size can be compile time constant, which avoids 444 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 445 */ 446 static inline int 447 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 448 unsigned int size) 449 { 450 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 451 #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT) 452 compat_sigset_t v; 453 switch (_NSIG_WORDS) { 454 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 455 fallthrough; 456 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 457 fallthrough; 458 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 459 fallthrough; 460 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 461 } 462 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 463 #else 464 return copy_to_user(compat, set, size) ? -EFAULT : 0; 465 #endif 466 } 467 468 #ifdef CONFIG_CPU_BIG_ENDIAN 469 #define unsafe_put_compat_sigset(compat, set, label) do { \ 470 compat_sigset_t __user *__c = compat; \ 471 const sigset_t *__s = set; \ 472 \ 473 switch (_NSIG_WORDS) { \ 474 case 4: \ 475 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 476 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 477 fallthrough; \ 478 case 3: \ 479 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 480 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 481 fallthrough; \ 482 case 2: \ 483 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 484 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 485 fallthrough; \ 486 case 1: \ 487 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 488 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 489 } \ 490 } while (0) 491 492 #define unsafe_get_compat_sigset(set, compat, label) do { \ 493 const compat_sigset_t __user *__c = compat; \ 494 compat_sigset_word hi, lo; \ 495 sigset_t *__s = set; \ 496 \ 497 switch (_NSIG_WORDS) { \ 498 case 4: \ 499 unsafe_get_user(lo, &__c->sig[7], label); \ 500 unsafe_get_user(hi, &__c->sig[6], label); \ 501 __s->sig[3] = hi | (((long)lo) << 32); \ 502 fallthrough; \ 503 case 3: \ 504 unsafe_get_user(lo, &__c->sig[5], label); \ 505 unsafe_get_user(hi, &__c->sig[4], label); \ 506 __s->sig[2] = hi | (((long)lo) << 32); \ 507 fallthrough; \ 508 case 2: \ 509 unsafe_get_user(lo, &__c->sig[3], label); \ 510 unsafe_get_user(hi, &__c->sig[2], label); \ 511 __s->sig[1] = hi | (((long)lo) << 32); \ 512 fallthrough; \ 513 case 1: \ 514 unsafe_get_user(lo, &__c->sig[1], label); \ 515 unsafe_get_user(hi, &__c->sig[0], label); \ 516 __s->sig[0] = hi | (((long)lo) << 32); \ 517 } \ 518 } while (0) 519 #else 520 #define unsafe_put_compat_sigset(compat, set, label) do { \ 521 compat_sigset_t __user *__c = compat; \ 522 const sigset_t *__s = set; \ 523 \ 524 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 525 } while (0) 526 527 #define unsafe_get_compat_sigset(set, compat, label) do { \ 528 const compat_sigset_t __user *__c = compat; \ 529 sigset_t *__s = set; \ 530 \ 531 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ 532 } while (0) 533 #endif 534 535 extern int compat_ptrace_request(struct task_struct *child, 536 compat_long_t request, 537 compat_ulong_t addr, compat_ulong_t data); 538 539 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 540 compat_ulong_t addr, compat_ulong_t data); 541 542 struct epoll_event; /* fortunately, this one is fixed-layout */ 543 544 int compat_restore_altstack(const compat_stack_t __user *uss); 545 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 546 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 547 compat_stack_t __user *__uss = uss; \ 548 struct task_struct *t = current; \ 549 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 550 &__uss->ss_sp, label); \ 551 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 552 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 553 } while (0); 554 555 /* 556 * These syscall function prototypes are kept in the same order as 557 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 558 * go below. 559 * 560 * Please note that these prototypes here are only provided for information 561 * purposes, for static analysis, and for linking from the syscall table. 562 * These functions should not be called elsewhere from kernel code. 563 * 564 * As the syscall calling convention may be different from the default 565 * for architectures overriding the syscall calling convention, do not 566 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 567 */ 568 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 569 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 570 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 571 u32 __user *iocb); 572 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 573 compat_long_t min_nr, 574 compat_long_t nr, 575 struct io_event __user *events, 576 struct old_timespec32 __user *timeout, 577 const struct __compat_aio_sigset __user *usig); 578 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 579 compat_long_t min_nr, 580 compat_long_t nr, 581 struct io_event __user *events, 582 struct __kernel_timespec __user *timeout, 583 const struct __compat_aio_sigset __user *usig); 584 asmlinkage long compat_sys_epoll_pwait(int epfd, 585 struct epoll_event __user *events, 586 int maxevents, int timeout, 587 const compat_sigset_t __user *sigmask, 588 compat_size_t sigsetsize); 589 asmlinkage long compat_sys_epoll_pwait2(int epfd, 590 struct epoll_event __user *events, 591 int maxevents, 592 const struct __kernel_timespec __user *timeout, 593 const compat_sigset_t __user *sigmask, 594 compat_size_t sigsetsize); 595 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 596 compat_ulong_t arg); 597 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 598 compat_ulong_t arg); 599 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 600 compat_ulong_t arg); 601 asmlinkage long compat_sys_statfs(const char __user *pathname, 602 struct compat_statfs __user *buf); 603 asmlinkage long compat_sys_statfs64(const char __user *pathname, 604 compat_size_t sz, 605 struct compat_statfs64 __user *buf); 606 asmlinkage long compat_sys_fstatfs(unsigned int fd, 607 struct compat_statfs __user *buf); 608 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 609 struct compat_statfs64 __user *buf); 610 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 611 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 612 /* No generic prototype for truncate64, ftruncate64, fallocate */ 613 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 614 int flags, umode_t mode); 615 asmlinkage long compat_sys_getdents(unsigned int fd, 616 struct compat_linux_dirent __user *dirent, 617 unsigned int count); 618 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 619 /* No generic prototype for pread64 and pwrite64 */ 620 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 621 const struct iovec __user *vec, 622 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 623 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 624 const struct iovec __user *vec, 625 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 626 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 627 asmlinkage long compat_sys_preadv64(unsigned long fd, 628 const struct iovec __user *vec, 629 unsigned long vlen, loff_t pos); 630 #endif 631 632 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 633 asmlinkage long compat_sys_pwritev64(unsigned long fd, 634 const struct iovec __user *vec, 635 unsigned long vlen, loff_t pos); 636 #endif 637 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 638 compat_off_t __user *offset, compat_size_t count); 639 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 640 compat_loff_t __user *offset, compat_size_t count); 641 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 642 compat_ulong_t __user *outp, 643 compat_ulong_t __user *exp, 644 struct old_timespec32 __user *tsp, 645 void __user *sig); 646 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 647 compat_ulong_t __user *outp, 648 compat_ulong_t __user *exp, 649 struct __kernel_timespec __user *tsp, 650 void __user *sig); 651 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 652 unsigned int nfds, 653 struct old_timespec32 __user *tsp, 654 const compat_sigset_t __user *sigmask, 655 compat_size_t sigsetsize); 656 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 657 unsigned int nfds, 658 struct __kernel_timespec __user *tsp, 659 const compat_sigset_t __user *sigmask, 660 compat_size_t sigsetsize); 661 asmlinkage long compat_sys_signalfd4(int ufd, 662 const compat_sigset_t __user *sigmask, 663 compat_size_t sigsetsize, int flags); 664 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 665 const char __user *filename, 666 struct compat_stat __user *statbuf, 667 int flag); 668 asmlinkage long compat_sys_newfstat(unsigned int fd, 669 struct compat_stat __user *statbuf); 670 /* No generic prototype for sync_file_range and sync_file_range2 */ 671 asmlinkage long compat_sys_waitid(int, compat_pid_t, 672 struct compat_siginfo __user *, int, 673 struct compat_rusage __user *); 674 asmlinkage long 675 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 676 compat_size_t len); 677 asmlinkage long 678 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 679 compat_size_t __user *len_ptr); 680 asmlinkage long compat_sys_getitimer(int which, 681 struct old_itimerval32 __user *it); 682 asmlinkage long compat_sys_setitimer(int which, 683 struct old_itimerval32 __user *in, 684 struct old_itimerval32 __user *out); 685 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 686 compat_ulong_t nr_segments, 687 struct compat_kexec_segment __user *, 688 compat_ulong_t flags); 689 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 690 struct compat_sigevent __user *timer_event_spec, 691 timer_t __user *created_timer_id); 692 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 693 compat_long_t addr, compat_long_t data); 694 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 695 unsigned int len, 696 compat_ulong_t __user *user_mask_ptr); 697 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 698 unsigned int len, 699 compat_ulong_t __user *user_mask_ptr); 700 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 701 compat_stack_t __user *uoss_ptr); 702 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 703 compat_size_t sigsetsize); 704 #ifndef CONFIG_ODD_RT_SIGACTION 705 asmlinkage long compat_sys_rt_sigaction(int, 706 const struct compat_sigaction __user *, 707 struct compat_sigaction __user *, 708 compat_size_t); 709 #endif 710 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 711 compat_sigset_t __user *oset, 712 compat_size_t sigsetsize); 713 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 714 compat_size_t sigsetsize); 715 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 716 struct compat_siginfo __user *uinfo, 717 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 718 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 719 struct compat_siginfo __user *uinfo, 720 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 721 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 722 struct compat_siginfo __user *uinfo); 723 /* No generic prototype for rt_sigreturn */ 724 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 725 asmlinkage long compat_sys_getrlimit(unsigned int resource, 726 struct compat_rlimit __user *rlim); 727 asmlinkage long compat_sys_setrlimit(unsigned int resource, 728 struct compat_rlimit __user *rlim); 729 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 730 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 731 struct timezone __user *tz); 732 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 733 struct timezone __user *tz); 734 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 735 asmlinkage long compat_sys_mq_open(const char __user *u_name, 736 int oflag, compat_mode_t mode, 737 struct compat_mq_attr __user *u_attr); 738 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 739 const struct compat_sigevent __user *u_notification); 740 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 741 const struct compat_mq_attr __user *u_mqstat, 742 struct compat_mq_attr __user *u_omqstat); 743 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 744 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 745 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 746 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 747 compat_ssize_t msgsz, int msgflg); 748 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 749 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 750 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 751 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 752 unsigned flags, struct sockaddr __user *addr, 753 int __user *addrlen); 754 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 755 unsigned flags); 756 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 757 unsigned int flags); 758 /* No generic prototype for readahead */ 759 asmlinkage long compat_sys_keyctl(u32 option, 760 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 761 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 762 const compat_uptr_t __user *envp); 763 /* No generic prototype for fadvise64_64 */ 764 /* CONFIG_MMU only */ 765 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 766 compat_pid_t pid, int sig, 767 struct compat_siginfo __user *uinfo); 768 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 769 unsigned vlen, unsigned int flags, 770 struct __kernel_timespec __user *timeout); 771 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 772 unsigned vlen, unsigned int flags, 773 struct old_timespec32 __user *timeout); 774 asmlinkage long compat_sys_wait4(compat_pid_t pid, 775 compat_uint_t __user *stat_addr, int options, 776 struct compat_rusage __user *ru); 777 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 778 int, const char __user *); 779 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 780 struct file_handle __user *handle, 781 int flags); 782 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 783 unsigned vlen, unsigned int flags); 784 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 785 const compat_uptr_t __user *argv, 786 const compat_uptr_t __user *envp, int flags); 787 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 788 const struct iovec __user *vec, 789 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 790 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 791 const struct iovec __user *vec, 792 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 793 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 794 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 795 const struct iovec __user *vec, 796 unsigned long vlen, loff_t pos, rwf_t flags); 797 #endif 798 799 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 800 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 801 const struct iovec __user *vec, 802 unsigned long vlen, loff_t pos, rwf_t flags); 803 #endif 804 805 806 /* 807 * Deprecated system calls which are still defined in 808 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 809 */ 810 811 /* __ARCH_WANT_SYSCALL_NO_AT */ 812 asmlinkage long compat_sys_open(const char __user *filename, int flags, 813 umode_t mode); 814 815 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 816 asmlinkage long compat_sys_signalfd(int ufd, 817 const compat_sigset_t __user *sigmask, 818 compat_size_t sigsetsize); 819 820 /* __ARCH_WANT_SYSCALL_OFF_T */ 821 asmlinkage long compat_sys_newstat(const char __user *filename, 822 struct compat_stat __user *statbuf); 823 asmlinkage long compat_sys_newlstat(const char __user *filename, 824 struct compat_stat __user *statbuf); 825 826 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 827 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 828 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 829 struct old_timeval32 __user *tvp); 830 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 831 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 832 unsigned flags); 833 834 /* obsolete */ 835 asmlinkage long compat_sys_old_readdir(unsigned int fd, 836 struct compat_old_linux_dirent __user *, 837 unsigned int count); 838 839 /* obsolete */ 840 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 841 842 /* obsolete */ 843 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 844 845 /* obsolete */ 846 #ifdef __ARCH_WANT_SYS_SIGPENDING 847 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 848 #endif 849 850 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 851 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 852 compat_old_sigset_t __user *oset); 853 #endif 854 #ifdef CONFIG_COMPAT_OLD_SIGACTION 855 asmlinkage long compat_sys_sigaction(int sig, 856 const struct compat_old_sigaction __user *act, 857 struct compat_old_sigaction __user *oact); 858 #endif 859 860 /* obsolete */ 861 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 862 863 #ifdef __ARCH_WANT_COMPAT_TRUNCATE64 864 asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len)); 865 #endif 866 867 #ifdef __ARCH_WANT_COMPAT_FTRUNCATE64 868 asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len)); 869 #endif 870 871 #ifdef __ARCH_WANT_COMPAT_FALLOCATE 872 asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset), 873 compat_arg_u64(len)); 874 #endif 875 876 #ifdef __ARCH_WANT_COMPAT_PREAD64 877 asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count, 878 compat_arg_u64(pos)); 879 #endif 880 881 #ifdef __ARCH_WANT_COMPAT_PWRITE64 882 asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count, 883 compat_arg_u64(pos)); 884 #endif 885 886 #ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE 887 asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos), 888 compat_arg_u64(nbytes), unsigned int flags); 889 #endif 890 891 #ifdef __ARCH_WANT_COMPAT_FADVISE64_64 892 asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos), 893 compat_arg_u64(len), int advice); 894 #endif 895 896 #ifdef __ARCH_WANT_COMPAT_READAHEAD 897 asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count); 898 #endif 899 900 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 901 902 /** 903 * ns_to_old_timeval32 - Compat version of ns_to_timeval 904 * @nsec: the nanoseconds value to be converted 905 * 906 * Returns the old_timeval32 representation of the nsec parameter. 907 */ 908 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 909 { 910 struct __kernel_old_timeval tv; 911 struct old_timeval32 ctv; 912 913 tv = ns_to_kernel_old_timeval(nsec); 914 ctv.tv_sec = tv.tv_sec; 915 ctv.tv_usec = tv.tv_usec; 916 917 return ctv; 918 } 919 920 /* 921 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 922 * directly. Instead, use one of the functions which work equivalently, such 923 * as the kcompat_sys_xyzyyz() functions prototyped below. 924 */ 925 926 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 927 struct compat_statfs64 __user * buf); 928 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 929 struct compat_statfs64 __user * buf); 930 931 #ifdef CONFIG_COMPAT 932 933 /* 934 * For most but not all architectures, "am I in a compat syscall?" and 935 * "am I a compat task?" are the same question. For architectures on which 936 * they aren't the same question, arch code can override in_compat_syscall. 937 */ 938 #ifndef in_compat_syscall 939 static inline bool in_compat_syscall(void) { return is_compat_task(); } 940 #endif 941 942 #else /* !CONFIG_COMPAT */ 943 944 #define is_compat_task() (0) 945 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 946 #define in_compat_syscall in_compat_syscall 947 static inline bool in_compat_syscall(void) { return false; } 948 949 #endif /* CONFIG_COMPAT */ 950 951 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 952 953 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 954 955 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 956 unsigned long bitmap_size); 957 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 958 unsigned long bitmap_size); 959 960 /* 961 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 962 * types, and will need special compat treatment for that. Most architectures 963 * don't need that special handling even for compat syscalls. 964 */ 965 #ifndef compat_need_64bit_alignment_fixup 966 #define compat_need_64bit_alignment_fixup() false 967 #endif 968 969 /* 970 * A pointer passed in from user mode. This should not 971 * be used for syscall parameters, just declare them 972 * as pointers because the syscall entry code will have 973 * appropriately converted them already. 974 */ 975 #ifndef compat_ptr 976 static inline void __user *compat_ptr(compat_uptr_t uptr) 977 { 978 return (void __user *)(unsigned long)uptr; 979 } 980 #endif 981 982 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 983 { 984 return (u32)(unsigned long)uptr; 985 } 986 987 #endif /* _LINUX_COMPAT_H */ 988