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 24 #ifdef CONFIG_COMPAT 25 #include <asm/siginfo.h> 26 #include <asm/signal.h> 27 #endif 28 29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 30 /* 31 * It may be useful for an architecture to override the definitions of the 32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular 33 * to use a different calling convention for syscalls. To allow for that, 34 + the prototypes for the compat_sys_*() functions below will *not* be included 35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 36 */ 37 #include <asm/syscall_wrapper.h> 38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 39 40 #ifndef COMPAT_USE_64BIT_TIME 41 #define COMPAT_USE_64BIT_TIME 0 42 #endif 43 44 #ifndef __SC_DELOUSE 45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) 46 #endif 47 48 #ifndef COMPAT_SYSCALL_DEFINE0 49 #define COMPAT_SYSCALL_DEFINE0(name) \ 50 asmlinkage long compat_sys_##name(void); \ 51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ 52 asmlinkage long compat_sys_##name(void) 53 #endif /* COMPAT_SYSCALL_DEFINE0 */ 54 55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \ 56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) 57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \ 58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) 59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \ 60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) 61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \ 62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) 63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \ 64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) 65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \ 66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) 67 68 /* 69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which 70 * sign-extends 32-bit ints to longs whenever needed. The actual work is 71 * done within __do_compat_sys_*(). 72 */ 73 #ifndef COMPAT_SYSCALL_DEFINEx 74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 75 __diag_push(); \ 76 __diag_ignore(GCC, 8, "-Wattribute-alias", \ 77 "Type aliasing is used to sanitize syscall arguments");\ 78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 85 { \ 86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 87 __MAP(x,__SC_TEST,__VA_ARGS__); \ 88 return ret; \ 89 } \ 90 __diag_pop(); \ 91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 92 #endif /* COMPAT_SYSCALL_DEFINEx */ 93 94 #ifdef CONFIG_COMPAT 95 96 #ifndef compat_user_stack_pointer 97 #define compat_user_stack_pointer() current_user_stack_pointer() 98 #endif 99 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 100 typedef struct compat_sigaltstack { 101 compat_uptr_t ss_sp; 102 int ss_flags; 103 compat_size_t ss_size; 104 } compat_stack_t; 105 #endif 106 #ifndef COMPAT_MINSIGSTKSZ 107 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 108 #endif 109 110 #define compat_jiffies_to_clock_t(x) \ 111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 112 113 typedef __compat_uid32_t compat_uid_t; 114 typedef __compat_gid32_t compat_gid_t; 115 116 struct compat_sel_arg_struct; 117 struct rusage; 118 119 struct old_itimerval32; 120 121 struct compat_tms { 122 compat_clock_t tms_utime; 123 compat_clock_t tms_stime; 124 compat_clock_t tms_cutime; 125 compat_clock_t tms_cstime; 126 }; 127 128 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 129 130 typedef struct { 131 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 132 } compat_sigset_t; 133 134 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 135 size_t sigsetsize); 136 137 struct compat_sigaction { 138 #ifndef __ARCH_HAS_IRIX_SIGACTION 139 compat_uptr_t sa_handler; 140 compat_ulong_t sa_flags; 141 #else 142 compat_uint_t sa_flags; 143 compat_uptr_t sa_handler; 144 #endif 145 #ifdef __ARCH_HAS_SA_RESTORER 146 compat_uptr_t sa_restorer; 147 #endif 148 compat_sigset_t sa_mask __packed; 149 }; 150 151 typedef union compat_sigval { 152 compat_int_t sival_int; 153 compat_uptr_t sival_ptr; 154 } compat_sigval_t; 155 156 typedef struct compat_siginfo { 157 int si_signo; 158 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 159 int si_errno; 160 int si_code; 161 #else 162 int si_code; 163 int si_errno; 164 #endif 165 166 union { 167 int _pad[128/sizeof(int) - 3]; 168 169 /* kill() */ 170 struct { 171 compat_pid_t _pid; /* sender's pid */ 172 __compat_uid32_t _uid; /* sender's uid */ 173 } _kill; 174 175 /* POSIX.1b timers */ 176 struct { 177 compat_timer_t _tid; /* timer id */ 178 int _overrun; /* overrun count */ 179 compat_sigval_t _sigval; /* same as below */ 180 } _timer; 181 182 /* POSIX.1b signals */ 183 struct { 184 compat_pid_t _pid; /* sender's pid */ 185 __compat_uid32_t _uid; /* sender's uid */ 186 compat_sigval_t _sigval; 187 } _rt; 188 189 /* SIGCHLD */ 190 struct { 191 compat_pid_t _pid; /* which child */ 192 __compat_uid32_t _uid; /* sender's uid */ 193 int _status; /* exit code */ 194 compat_clock_t _utime; 195 compat_clock_t _stime; 196 } _sigchld; 197 198 #ifdef CONFIG_X86_X32_ABI 199 /* SIGCHLD (x32 version) */ 200 struct { 201 compat_pid_t _pid; /* which child */ 202 __compat_uid32_t _uid; /* sender's uid */ 203 int _status; /* exit code */ 204 compat_s64 _utime; 205 compat_s64 _stime; 206 } _sigchld_x32; 207 #endif 208 209 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 210 struct { 211 compat_uptr_t _addr; /* faulting insn/memory ref. */ 212 #ifdef __ARCH_SI_TRAPNO 213 int _trapno; /* TRAP # which caused the signal */ 214 #endif 215 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 216 sizeof(short) : __alignof__(compat_uptr_t)) 217 union { 218 /* 219 * used when si_code=BUS_MCEERR_AR or 220 * used when si_code=BUS_MCEERR_AO 221 */ 222 short int _addr_lsb; /* Valid LSB of the reported address. */ 223 /* used when si_code=SEGV_BNDERR */ 224 struct { 225 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 226 compat_uptr_t _lower; 227 compat_uptr_t _upper; 228 } _addr_bnd; 229 /* used when si_code=SEGV_PKUERR */ 230 struct { 231 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 232 u32 _pkey; 233 } _addr_pkey; 234 }; 235 } _sigfault; 236 237 /* SIGPOLL */ 238 struct { 239 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 240 int _fd; 241 } _sigpoll; 242 243 struct { 244 compat_uptr_t _call_addr; /* calling user insn */ 245 int _syscall; /* triggering system call number */ 246 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 247 } _sigsys; 248 } _sifields; 249 } compat_siginfo_t; 250 251 /* 252 * These functions operate on 32- or 64-bit specs depending on 253 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments. 254 */ 255 extern int compat_get_timespec(struct timespec *, const void __user *); 256 extern int compat_put_timespec(const struct timespec *, void __user *); 257 extern int compat_get_timeval(struct timeval *, const void __user *); 258 extern int compat_put_timeval(const struct timeval *, void __user *); 259 260 struct compat_iovec { 261 compat_uptr_t iov_base; 262 compat_size_t iov_len; 263 }; 264 265 struct compat_rlimit { 266 compat_ulong_t rlim_cur; 267 compat_ulong_t rlim_max; 268 }; 269 270 struct compat_rusage { 271 struct old_timeval32 ru_utime; 272 struct old_timeval32 ru_stime; 273 compat_long_t ru_maxrss; 274 compat_long_t ru_ixrss; 275 compat_long_t ru_idrss; 276 compat_long_t ru_isrss; 277 compat_long_t ru_minflt; 278 compat_long_t ru_majflt; 279 compat_long_t ru_nswap; 280 compat_long_t ru_inblock; 281 compat_long_t ru_oublock; 282 compat_long_t ru_msgsnd; 283 compat_long_t ru_msgrcv; 284 compat_long_t ru_nsignals; 285 compat_long_t ru_nvcsw; 286 compat_long_t ru_nivcsw; 287 }; 288 289 extern int put_compat_rusage(const struct rusage *, 290 struct compat_rusage __user *); 291 292 struct compat_siginfo; 293 struct __compat_aio_sigset; 294 295 struct compat_dirent { 296 u32 d_ino; 297 compat_off_t d_off; 298 u16 d_reclen; 299 char d_name[256]; 300 }; 301 302 struct compat_ustat { 303 compat_daddr_t f_tfree; 304 compat_ino_t f_tinode; 305 char f_fname[6]; 306 char f_fpack[6]; 307 }; 308 309 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 310 311 typedef struct compat_sigevent { 312 compat_sigval_t sigev_value; 313 compat_int_t sigev_signo; 314 compat_int_t sigev_notify; 315 union { 316 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 317 compat_int_t _tid; 318 319 struct { 320 compat_uptr_t _function; 321 compat_uptr_t _attribute; 322 } _sigev_thread; 323 } _sigev_un; 324 } compat_sigevent_t; 325 326 struct compat_ifmap { 327 compat_ulong_t mem_start; 328 compat_ulong_t mem_end; 329 unsigned short base_addr; 330 unsigned char irq; 331 unsigned char dma; 332 unsigned char port; 333 }; 334 335 struct compat_if_settings { 336 unsigned int type; /* Type of physical device or protocol */ 337 unsigned int size; /* Size of the data allocated by the caller */ 338 compat_uptr_t ifs_ifsu; /* union of pointers */ 339 }; 340 341 struct compat_ifreq { 342 union { 343 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 344 } ifr_ifrn; 345 union { 346 struct sockaddr ifru_addr; 347 struct sockaddr ifru_dstaddr; 348 struct sockaddr ifru_broadaddr; 349 struct sockaddr ifru_netmask; 350 struct sockaddr ifru_hwaddr; 351 short ifru_flags; 352 compat_int_t ifru_ivalue; 353 compat_int_t ifru_mtu; 354 struct compat_ifmap ifru_map; 355 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 356 char ifru_newname[IFNAMSIZ]; 357 compat_caddr_t ifru_data; 358 struct compat_if_settings ifru_settings; 359 } ifr_ifru; 360 }; 361 362 struct compat_ifconf { 363 compat_int_t ifc_len; /* size of buffer */ 364 compat_caddr_t ifcbuf; 365 }; 366 367 struct compat_robust_list { 368 compat_uptr_t next; 369 }; 370 371 struct compat_robust_list_head { 372 struct compat_robust_list list; 373 compat_long_t futex_offset; 374 compat_uptr_t list_op_pending; 375 }; 376 377 #ifdef CONFIG_COMPAT_OLD_SIGACTION 378 struct compat_old_sigaction { 379 compat_uptr_t sa_handler; 380 compat_old_sigset_t sa_mask; 381 compat_ulong_t sa_flags; 382 compat_uptr_t sa_restorer; 383 }; 384 #endif 385 386 struct compat_keyctl_kdf_params { 387 compat_uptr_t hashname; 388 compat_uptr_t otherinfo; 389 __u32 otherinfolen; 390 __u32 __spare[8]; 391 }; 392 393 struct compat_statfs; 394 struct compat_statfs64; 395 struct compat_old_linux_dirent; 396 struct compat_linux_dirent; 397 struct linux_dirent64; 398 struct compat_msghdr; 399 struct compat_mmsghdr; 400 struct compat_sysinfo; 401 struct compat_sysctl_args; 402 struct compat_kexec_segment; 403 struct compat_mq_attr; 404 struct compat_msgbuf; 405 406 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 407 408 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 409 410 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 411 unsigned long bitmap_size); 412 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 413 unsigned long bitmap_size); 414 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from); 415 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from); 416 int get_compat_sigevent(struct sigevent *event, 417 const struct compat_sigevent __user *u_event); 418 419 static inline int old_timeval32_compare(struct old_timeval32 *lhs, 420 struct old_timeval32 *rhs) 421 { 422 if (lhs->tv_sec < rhs->tv_sec) 423 return -1; 424 if (lhs->tv_sec > rhs->tv_sec) 425 return 1; 426 return lhs->tv_usec - rhs->tv_usec; 427 } 428 429 static inline int old_timespec32_compare(struct old_timespec32 *lhs, 430 struct old_timespec32 *rhs) 431 { 432 if (lhs->tv_sec < rhs->tv_sec) 433 return -1; 434 if (lhs->tv_sec > rhs->tv_sec) 435 return 1; 436 return lhs->tv_nsec - rhs->tv_nsec; 437 } 438 439 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 440 441 /* 442 * Defined inline such that size can be compile time constant, which avoids 443 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 444 */ 445 static inline int 446 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 447 unsigned int size) 448 { 449 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 450 #ifdef __BIG_ENDIAN 451 compat_sigset_t v; 452 switch (_NSIG_WORDS) { 453 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 454 /* fall through */ 455 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 456 /* fall through */ 457 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 458 /* fall through */ 459 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 460 } 461 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 462 #else 463 return copy_to_user(compat, set, size) ? -EFAULT : 0; 464 #endif 465 } 466 467 extern int compat_ptrace_request(struct task_struct *child, 468 compat_long_t request, 469 compat_ulong_t addr, compat_ulong_t data); 470 471 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 472 compat_ulong_t addr, compat_ulong_t data); 473 474 struct epoll_event; /* fortunately, this one is fixed-layout */ 475 476 extern ssize_t compat_rw_copy_check_uvector(int type, 477 const struct compat_iovec __user *uvector, 478 unsigned long nr_segs, 479 unsigned long fast_segs, struct iovec *fast_pointer, 480 struct iovec **ret_pointer); 481 482 extern void __user *compat_alloc_user_space(unsigned long len); 483 484 int compat_restore_altstack(const compat_stack_t __user *uss); 485 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 486 #define compat_save_altstack_ex(uss, sp) do { \ 487 compat_stack_t __user *__uss = uss; \ 488 struct task_struct *t = current; \ 489 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 490 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 491 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 492 if (t->sas_ss_flags & SS_AUTODISARM) \ 493 sas_ss_reset(t); \ 494 } while (0); 495 496 /* 497 * These syscall function prototypes are kept in the same order as 498 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 499 * go below. 500 * 501 * Please note that these prototypes here are only provided for information 502 * purposes, for static analysis, and for linking from the syscall table. 503 * These functions should not be called elsewhere from kernel code. 504 * 505 * As the syscall calling convention may be different from the default 506 * for architectures overriding the syscall calling convention, do not 507 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 508 */ 509 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 510 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 511 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 512 u32 __user *iocb); 513 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 514 compat_long_t min_nr, 515 compat_long_t nr, 516 struct io_event __user *events, 517 struct old_timespec32 __user *timeout, 518 const struct __compat_aio_sigset __user *usig); 519 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 520 compat_long_t min_nr, 521 compat_long_t nr, 522 struct io_event __user *events, 523 struct __kernel_timespec __user *timeout, 524 const struct __compat_aio_sigset __user *usig); 525 526 /* fs/cookies.c */ 527 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 528 529 /* fs/eventpoll.c */ 530 asmlinkage long compat_sys_epoll_pwait(int epfd, 531 struct epoll_event __user *events, 532 int maxevents, int timeout, 533 const compat_sigset_t __user *sigmask, 534 compat_size_t sigsetsize); 535 536 /* fs/fcntl.c */ 537 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 538 compat_ulong_t arg); 539 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 540 compat_ulong_t arg); 541 542 /* fs/ioctl.c */ 543 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 544 compat_ulong_t arg); 545 546 /* fs/namespace.c */ 547 asmlinkage long compat_sys_mount(const char __user *dev_name, 548 const char __user *dir_name, 549 const char __user *type, compat_ulong_t flags, 550 const void __user *data); 551 552 /* fs/open.c */ 553 asmlinkage long compat_sys_statfs(const char __user *pathname, 554 struct compat_statfs __user *buf); 555 asmlinkage long compat_sys_statfs64(const char __user *pathname, 556 compat_size_t sz, 557 struct compat_statfs64 __user *buf); 558 asmlinkage long compat_sys_fstatfs(unsigned int fd, 559 struct compat_statfs __user *buf); 560 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 561 struct compat_statfs64 __user *buf); 562 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 563 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 564 /* No generic prototype for truncate64, ftruncate64, fallocate */ 565 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 566 int flags, umode_t mode); 567 568 /* fs/readdir.c */ 569 asmlinkage long compat_sys_getdents(unsigned int fd, 570 struct compat_linux_dirent __user *dirent, 571 unsigned int count); 572 573 /* fs/read_write.c */ 574 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 575 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 576 const struct compat_iovec __user *vec, compat_ulong_t vlen); 577 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 578 const struct compat_iovec __user *vec, compat_ulong_t vlen); 579 /* No generic prototype for pread64 and pwrite64 */ 580 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 581 const struct compat_iovec __user *vec, 582 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 583 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 584 const struct compat_iovec __user *vec, 585 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 586 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 587 asmlinkage long compat_sys_preadv64(unsigned long fd, 588 const struct compat_iovec __user *vec, 589 unsigned long vlen, loff_t pos); 590 #endif 591 592 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 593 asmlinkage long compat_sys_pwritev64(unsigned long fd, 594 const struct compat_iovec __user *vec, 595 unsigned long vlen, loff_t pos); 596 #endif 597 598 /* fs/sendfile.c */ 599 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 600 compat_off_t __user *offset, compat_size_t count); 601 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 602 compat_loff_t __user *offset, compat_size_t count); 603 604 /* fs/select.c */ 605 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 606 compat_ulong_t __user *outp, 607 compat_ulong_t __user *exp, 608 struct old_timespec32 __user *tsp, 609 void __user *sig); 610 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 611 compat_ulong_t __user *outp, 612 compat_ulong_t __user *exp, 613 struct __kernel_timespec __user *tsp, 614 void __user *sig); 615 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 616 unsigned int nfds, 617 struct old_timespec32 __user *tsp, 618 const compat_sigset_t __user *sigmask, 619 compat_size_t sigsetsize); 620 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 621 unsigned int nfds, 622 struct __kernel_timespec __user *tsp, 623 const compat_sigset_t __user *sigmask, 624 compat_size_t sigsetsize); 625 626 /* fs/signalfd.c */ 627 asmlinkage long compat_sys_signalfd4(int ufd, 628 const compat_sigset_t __user *sigmask, 629 compat_size_t sigsetsize, int flags); 630 631 /* fs/splice.c */ 632 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 633 unsigned int nr_segs, unsigned int flags); 634 635 /* fs/stat.c */ 636 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 637 const char __user *filename, 638 struct compat_stat __user *statbuf, 639 int flag); 640 asmlinkage long compat_sys_newfstat(unsigned int fd, 641 struct compat_stat __user *statbuf); 642 643 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 644 645 /* kernel/exit.c */ 646 asmlinkage long compat_sys_waitid(int, compat_pid_t, 647 struct compat_siginfo __user *, int, 648 struct compat_rusage __user *); 649 650 651 652 /* kernel/futex.c */ 653 asmlinkage long 654 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 655 compat_size_t len); 656 asmlinkage long 657 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 658 compat_size_t __user *len_ptr); 659 660 /* kernel/itimer.c */ 661 asmlinkage long compat_sys_getitimer(int which, 662 struct old_itimerval32 __user *it); 663 asmlinkage long compat_sys_setitimer(int which, 664 struct old_itimerval32 __user *in, 665 struct old_itimerval32 __user *out); 666 667 /* kernel/kexec.c */ 668 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 669 compat_ulong_t nr_segments, 670 struct compat_kexec_segment __user *, 671 compat_ulong_t flags); 672 673 /* kernel/posix-timers.c */ 674 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 675 struct compat_sigevent __user *timer_event_spec, 676 timer_t __user *created_timer_id); 677 678 /* kernel/ptrace.c */ 679 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 680 compat_long_t addr, compat_long_t data); 681 682 /* kernel/sched/core.c */ 683 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 684 unsigned int len, 685 compat_ulong_t __user *user_mask_ptr); 686 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 687 unsigned int len, 688 compat_ulong_t __user *user_mask_ptr); 689 690 /* kernel/signal.c */ 691 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 692 compat_stack_t __user *uoss_ptr); 693 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 694 compat_size_t sigsetsize); 695 #ifndef CONFIG_ODD_RT_SIGACTION 696 asmlinkage long compat_sys_rt_sigaction(int, 697 const struct compat_sigaction __user *, 698 struct compat_sigaction __user *, 699 compat_size_t); 700 #endif 701 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 702 compat_sigset_t __user *oset, 703 compat_size_t sigsetsize); 704 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 705 compat_size_t sigsetsize); 706 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 707 struct compat_siginfo __user *uinfo, 708 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 709 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 710 struct compat_siginfo __user *uinfo, 711 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 712 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 713 struct compat_siginfo __user *uinfo); 714 /* No generic prototype for rt_sigreturn */ 715 716 /* kernel/sys.c */ 717 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 718 asmlinkage long compat_sys_getrlimit(unsigned int resource, 719 struct compat_rlimit __user *rlim); 720 asmlinkage long compat_sys_setrlimit(unsigned int resource, 721 struct compat_rlimit __user *rlim); 722 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 723 724 /* kernel/time.c */ 725 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 726 struct timezone __user *tz); 727 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 728 struct timezone __user *tz); 729 730 /* kernel/timer.c */ 731 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 732 733 /* ipc/mqueue.c */ 734 asmlinkage long compat_sys_mq_open(const char __user *u_name, 735 int oflag, compat_mode_t mode, 736 struct compat_mq_attr __user *u_attr); 737 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 738 const struct compat_sigevent __user *u_notification); 739 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 740 const struct compat_mq_attr __user *u_mqstat, 741 struct compat_mq_attr __user *u_omqstat); 742 743 /* ipc/msg.c */ 744 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 745 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 746 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 747 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 748 compat_ssize_t msgsz, int msgflg); 749 750 /* ipc/sem.c */ 751 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 752 753 /* ipc/shm.c */ 754 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 755 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 756 757 /* net/socket.c */ 758 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 759 unsigned flags, struct sockaddr __user *addr, 760 int __user *addrlen); 761 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 762 char __user *optval, unsigned int optlen); 763 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 764 char __user *optval, int __user *optlen); 765 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 766 unsigned flags); 767 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 768 unsigned int flags); 769 770 /* mm/filemap.c: No generic prototype for readahead */ 771 772 /* security/keys/keyctl.c */ 773 asmlinkage long compat_sys_keyctl(u32 option, 774 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 775 776 /* arch/example/kernel/sys_example.c */ 777 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 778 const compat_uptr_t __user *envp); 779 780 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 781 782 /* mm/, CONFIG_MMU only */ 783 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 784 compat_ulong_t mode, 785 compat_ulong_t __user *nmask, 786 compat_ulong_t maxnode, compat_ulong_t flags); 787 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 788 compat_ulong_t __user *nmask, 789 compat_ulong_t maxnode, 790 compat_ulong_t addr, 791 compat_ulong_t flags); 792 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 793 compat_ulong_t maxnode); 794 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 795 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 796 const compat_ulong_t __user *new_nodes); 797 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 798 __u32 __user *pages, 799 const int __user *nodes, 800 int __user *status, 801 int flags); 802 803 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 804 compat_pid_t pid, int sig, 805 struct compat_siginfo __user *uinfo); 806 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 807 unsigned vlen, unsigned int flags, 808 struct __kernel_timespec __user *timeout); 809 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 810 unsigned vlen, unsigned int flags, 811 struct old_timespec32 __user *timeout); 812 asmlinkage long compat_sys_wait4(compat_pid_t pid, 813 compat_uint_t __user *stat_addr, int options, 814 struct compat_rusage __user *ru); 815 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 816 int, const char __user *); 817 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 818 struct file_handle __user *handle, 819 int flags); 820 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 821 unsigned vlen, unsigned int flags); 822 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 823 const struct compat_iovec __user *lvec, 824 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 825 compat_ulong_t riovcnt, compat_ulong_t flags); 826 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 827 const struct compat_iovec __user *lvec, 828 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 829 compat_ulong_t riovcnt, compat_ulong_t flags); 830 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 831 const compat_uptr_t __user *argv, 832 const compat_uptr_t __user *envp, int flags); 833 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 834 const struct compat_iovec __user *vec, 835 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 836 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 837 const struct compat_iovec __user *vec, 838 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 839 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 840 asmlinkage long compat_sys_readv64v2(unsigned long fd, 841 const struct compat_iovec __user *vec, 842 unsigned long vlen, loff_t pos, rwf_t flags); 843 #endif 844 845 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 846 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 847 const struct compat_iovec __user *vec, 848 unsigned long vlen, loff_t pos, rwf_t flags); 849 #endif 850 851 852 /* 853 * Deprecated system calls which are still defined in 854 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 855 */ 856 857 /* __ARCH_WANT_SYSCALL_NO_AT */ 858 asmlinkage long compat_sys_open(const char __user *filename, int flags, 859 umode_t mode); 860 861 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 862 asmlinkage long compat_sys_signalfd(int ufd, 863 const compat_sigset_t __user *sigmask, 864 compat_size_t sigsetsize); 865 866 /* __ARCH_WANT_SYSCALL_OFF_T */ 867 asmlinkage long compat_sys_newstat(const char __user *filename, 868 struct compat_stat __user *statbuf); 869 asmlinkage long compat_sys_newlstat(const char __user *filename, 870 struct compat_stat __user *statbuf); 871 872 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 873 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 874 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 875 struct old_timeval32 __user *tvp); 876 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 877 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 878 unsigned flags); 879 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 880 881 /* obsolete: fs/readdir.c */ 882 asmlinkage long compat_sys_old_readdir(unsigned int fd, 883 struct compat_old_linux_dirent __user *, 884 unsigned int count); 885 886 /* obsolete: fs/select.c */ 887 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 888 889 /* obsolete: ipc */ 890 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 891 892 /* obsolete: kernel/signal.c */ 893 #ifdef __ARCH_WANT_SYS_SIGPENDING 894 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 895 #endif 896 897 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 898 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 899 compat_old_sigset_t __user *oset); 900 #endif 901 #ifdef CONFIG_COMPAT_OLD_SIGACTION 902 asmlinkage long compat_sys_sigaction(int sig, 903 const struct compat_old_sigaction __user *act, 904 struct compat_old_sigaction __user *oact); 905 #endif 906 907 /* obsolete: net/socket.c */ 908 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 909 910 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 911 912 913 /* 914 * For most but not all architectures, "am I in a compat syscall?" and 915 * "am I a compat task?" are the same question. For architectures on which 916 * they aren't the same question, arch code can override in_compat_syscall. 917 */ 918 919 #ifndef in_compat_syscall 920 static inline bool in_compat_syscall(void) { return is_compat_task(); } 921 #endif 922 923 /** 924 * ns_to_old_timeval32 - Compat version of ns_to_timeval 925 * @nsec: the nanoseconds value to be converted 926 * 927 * Returns the old_timeval32 representation of the nsec parameter. 928 */ 929 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 930 { 931 struct __kernel_old_timeval tv; 932 struct old_timeval32 ctv; 933 934 tv = ns_to_kernel_old_timeval(nsec); 935 ctv.tv_sec = tv.tv_sec; 936 ctv.tv_usec = tv.tv_usec; 937 938 return ctv; 939 } 940 941 /* 942 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 943 * directly. Instead, use one of the functions which work equivalently, such 944 * as the kcompat_sys_xyzyyz() functions prototyped below. 945 */ 946 947 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 948 struct compat_statfs64 __user * buf); 949 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 950 struct compat_statfs64 __user * buf); 951 952 #else /* !CONFIG_COMPAT */ 953 954 #define is_compat_task() (0) 955 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 956 #define in_compat_syscall in_compat_syscall 957 static inline bool in_compat_syscall(void) { return false; } 958 959 #endif /* CONFIG_COMPAT */ 960 961 /* 962 * A pointer passed in from user mode. This should not 963 * be used for syscall parameters, just declare them 964 * as pointers because the syscall entry code will have 965 * appropriately converted them already. 966 */ 967 #ifndef compat_ptr 968 static inline void __user *compat_ptr(compat_uptr_t uptr) 969 { 970 return (void __user *)(unsigned long)uptr; 971 } 972 #endif 973 974 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 975 { 976 return (u32)(unsigned long)uptr; 977 } 978 979 #endif /* _LINUX_COMPAT_H */ 980