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 struct compat_iovec { 252 compat_uptr_t iov_base; 253 compat_size_t iov_len; 254 }; 255 256 struct compat_rlimit { 257 compat_ulong_t rlim_cur; 258 compat_ulong_t rlim_max; 259 }; 260 261 struct compat_rusage { 262 struct old_timeval32 ru_utime; 263 struct old_timeval32 ru_stime; 264 compat_long_t ru_maxrss; 265 compat_long_t ru_ixrss; 266 compat_long_t ru_idrss; 267 compat_long_t ru_isrss; 268 compat_long_t ru_minflt; 269 compat_long_t ru_majflt; 270 compat_long_t ru_nswap; 271 compat_long_t ru_inblock; 272 compat_long_t ru_oublock; 273 compat_long_t ru_msgsnd; 274 compat_long_t ru_msgrcv; 275 compat_long_t ru_nsignals; 276 compat_long_t ru_nvcsw; 277 compat_long_t ru_nivcsw; 278 }; 279 280 extern int put_compat_rusage(const struct rusage *, 281 struct compat_rusage __user *); 282 283 struct compat_siginfo; 284 struct __compat_aio_sigset; 285 286 struct compat_dirent { 287 u32 d_ino; 288 compat_off_t d_off; 289 u16 d_reclen; 290 char d_name[256]; 291 }; 292 293 struct compat_ustat { 294 compat_daddr_t f_tfree; 295 compat_ino_t f_tinode; 296 char f_fname[6]; 297 char f_fpack[6]; 298 }; 299 300 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 301 302 typedef struct compat_sigevent { 303 compat_sigval_t sigev_value; 304 compat_int_t sigev_signo; 305 compat_int_t sigev_notify; 306 union { 307 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 308 compat_int_t _tid; 309 310 struct { 311 compat_uptr_t _function; 312 compat_uptr_t _attribute; 313 } _sigev_thread; 314 } _sigev_un; 315 } compat_sigevent_t; 316 317 struct compat_ifmap { 318 compat_ulong_t mem_start; 319 compat_ulong_t mem_end; 320 unsigned short base_addr; 321 unsigned char irq; 322 unsigned char dma; 323 unsigned char port; 324 }; 325 326 struct compat_if_settings { 327 unsigned int type; /* Type of physical device or protocol */ 328 unsigned int size; /* Size of the data allocated by the caller */ 329 compat_uptr_t ifs_ifsu; /* union of pointers */ 330 }; 331 332 struct compat_ifreq { 333 union { 334 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 335 } ifr_ifrn; 336 union { 337 struct sockaddr ifru_addr; 338 struct sockaddr ifru_dstaddr; 339 struct sockaddr ifru_broadaddr; 340 struct sockaddr ifru_netmask; 341 struct sockaddr ifru_hwaddr; 342 short ifru_flags; 343 compat_int_t ifru_ivalue; 344 compat_int_t ifru_mtu; 345 struct compat_ifmap ifru_map; 346 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 347 char ifru_newname[IFNAMSIZ]; 348 compat_caddr_t ifru_data; 349 struct compat_if_settings ifru_settings; 350 } ifr_ifru; 351 }; 352 353 struct compat_ifconf { 354 compat_int_t ifc_len; /* size of buffer */ 355 compat_caddr_t ifcbuf; 356 }; 357 358 struct compat_robust_list { 359 compat_uptr_t next; 360 }; 361 362 struct compat_robust_list_head { 363 struct compat_robust_list list; 364 compat_long_t futex_offset; 365 compat_uptr_t list_op_pending; 366 }; 367 368 #ifdef CONFIG_COMPAT_OLD_SIGACTION 369 struct compat_old_sigaction { 370 compat_uptr_t sa_handler; 371 compat_old_sigset_t sa_mask; 372 compat_ulong_t sa_flags; 373 compat_uptr_t sa_restorer; 374 }; 375 #endif 376 377 struct compat_keyctl_kdf_params { 378 compat_uptr_t hashname; 379 compat_uptr_t otherinfo; 380 __u32 otherinfolen; 381 __u32 __spare[8]; 382 }; 383 384 struct compat_statfs; 385 struct compat_statfs64; 386 struct compat_old_linux_dirent; 387 struct compat_linux_dirent; 388 struct linux_dirent64; 389 struct compat_msghdr; 390 struct compat_mmsghdr; 391 struct compat_sysinfo; 392 struct compat_sysctl_args; 393 struct compat_kexec_segment; 394 struct compat_mq_attr; 395 struct compat_msgbuf; 396 397 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 398 399 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 400 401 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 402 unsigned long bitmap_size); 403 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 404 unsigned long bitmap_size); 405 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from); 406 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from); 407 int get_compat_sigevent(struct sigevent *event, 408 const struct compat_sigevent __user *u_event); 409 410 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 411 412 /* 413 * Defined inline such that size can be compile time constant, which avoids 414 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 415 */ 416 static inline int 417 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 418 unsigned int size) 419 { 420 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 421 #ifdef __BIG_ENDIAN 422 compat_sigset_t v; 423 switch (_NSIG_WORDS) { 424 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 425 /* fall through */ 426 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 427 /* fall through */ 428 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 429 /* fall through */ 430 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 431 } 432 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 433 #else 434 return copy_to_user(compat, set, size) ? -EFAULT : 0; 435 #endif 436 } 437 438 extern int compat_ptrace_request(struct task_struct *child, 439 compat_long_t request, 440 compat_ulong_t addr, compat_ulong_t data); 441 442 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 443 compat_ulong_t addr, compat_ulong_t data); 444 445 struct epoll_event; /* fortunately, this one is fixed-layout */ 446 447 extern ssize_t compat_rw_copy_check_uvector(int type, 448 const struct compat_iovec __user *uvector, 449 unsigned long nr_segs, 450 unsigned long fast_segs, struct iovec *fast_pointer, 451 struct iovec **ret_pointer); 452 453 extern void __user *compat_alloc_user_space(unsigned long len); 454 455 int compat_restore_altstack(const compat_stack_t __user *uss); 456 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 457 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 458 compat_stack_t __user *__uss = uss; \ 459 struct task_struct *t = current; \ 460 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 461 &__uss->ss_sp, label); \ 462 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 463 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 464 if (t->sas_ss_flags & SS_AUTODISARM) \ 465 sas_ss_reset(t); \ 466 } while (0); 467 468 /* 469 * These syscall function prototypes are kept in the same order as 470 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 471 * go below. 472 * 473 * Please note that these prototypes here are only provided for information 474 * purposes, for static analysis, and for linking from the syscall table. 475 * These functions should not be called elsewhere from kernel code. 476 * 477 * As the syscall calling convention may be different from the default 478 * for architectures overriding the syscall calling convention, do not 479 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 480 */ 481 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 482 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 483 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 484 u32 __user *iocb); 485 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 486 compat_long_t min_nr, 487 compat_long_t nr, 488 struct io_event __user *events, 489 struct old_timespec32 __user *timeout, 490 const struct __compat_aio_sigset __user *usig); 491 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 492 compat_long_t min_nr, 493 compat_long_t nr, 494 struct io_event __user *events, 495 struct __kernel_timespec __user *timeout, 496 const struct __compat_aio_sigset __user *usig); 497 498 /* fs/cookies.c */ 499 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 500 501 /* fs/eventpoll.c */ 502 asmlinkage long compat_sys_epoll_pwait(int epfd, 503 struct epoll_event __user *events, 504 int maxevents, int timeout, 505 const compat_sigset_t __user *sigmask, 506 compat_size_t sigsetsize); 507 508 /* fs/fcntl.c */ 509 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 510 compat_ulong_t arg); 511 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 512 compat_ulong_t arg); 513 514 /* fs/ioctl.c */ 515 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 516 compat_ulong_t arg); 517 518 /* fs/namespace.c */ 519 asmlinkage long compat_sys_mount(const char __user *dev_name, 520 const char __user *dir_name, 521 const char __user *type, compat_ulong_t flags, 522 const void __user *data); 523 524 /* fs/open.c */ 525 asmlinkage long compat_sys_statfs(const char __user *pathname, 526 struct compat_statfs __user *buf); 527 asmlinkage long compat_sys_statfs64(const char __user *pathname, 528 compat_size_t sz, 529 struct compat_statfs64 __user *buf); 530 asmlinkage long compat_sys_fstatfs(unsigned int fd, 531 struct compat_statfs __user *buf); 532 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 533 struct compat_statfs64 __user *buf); 534 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 535 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 536 /* No generic prototype for truncate64, ftruncate64, fallocate */ 537 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 538 int flags, umode_t mode); 539 540 /* fs/readdir.c */ 541 asmlinkage long compat_sys_getdents(unsigned int fd, 542 struct compat_linux_dirent __user *dirent, 543 unsigned int count); 544 545 /* fs/read_write.c */ 546 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 547 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 548 const struct compat_iovec __user *vec, compat_ulong_t vlen); 549 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 550 const struct compat_iovec __user *vec, compat_ulong_t vlen); 551 /* No generic prototype for pread64 and pwrite64 */ 552 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 553 const struct compat_iovec __user *vec, 554 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 555 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 556 const struct compat_iovec __user *vec, 557 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 558 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 559 asmlinkage long compat_sys_preadv64(unsigned long fd, 560 const struct compat_iovec __user *vec, 561 unsigned long vlen, loff_t pos); 562 #endif 563 564 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 565 asmlinkage long compat_sys_pwritev64(unsigned long fd, 566 const struct compat_iovec __user *vec, 567 unsigned long vlen, loff_t pos); 568 #endif 569 570 /* fs/sendfile.c */ 571 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 572 compat_off_t __user *offset, compat_size_t count); 573 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 574 compat_loff_t __user *offset, compat_size_t count); 575 576 /* fs/select.c */ 577 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 578 compat_ulong_t __user *outp, 579 compat_ulong_t __user *exp, 580 struct old_timespec32 __user *tsp, 581 void __user *sig); 582 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 583 compat_ulong_t __user *outp, 584 compat_ulong_t __user *exp, 585 struct __kernel_timespec __user *tsp, 586 void __user *sig); 587 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 588 unsigned int nfds, 589 struct old_timespec32 __user *tsp, 590 const compat_sigset_t __user *sigmask, 591 compat_size_t sigsetsize); 592 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 593 unsigned int nfds, 594 struct __kernel_timespec __user *tsp, 595 const compat_sigset_t __user *sigmask, 596 compat_size_t sigsetsize); 597 598 /* fs/signalfd.c */ 599 asmlinkage long compat_sys_signalfd4(int ufd, 600 const compat_sigset_t __user *sigmask, 601 compat_size_t sigsetsize, int flags); 602 603 /* fs/splice.c */ 604 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 605 unsigned int nr_segs, unsigned int flags); 606 607 /* fs/stat.c */ 608 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 609 const char __user *filename, 610 struct compat_stat __user *statbuf, 611 int flag); 612 asmlinkage long compat_sys_newfstat(unsigned int fd, 613 struct compat_stat __user *statbuf); 614 615 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 616 617 /* kernel/exit.c */ 618 asmlinkage long compat_sys_waitid(int, compat_pid_t, 619 struct compat_siginfo __user *, int, 620 struct compat_rusage __user *); 621 622 623 624 /* kernel/futex.c */ 625 asmlinkage long 626 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 627 compat_size_t len); 628 asmlinkage long 629 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 630 compat_size_t __user *len_ptr); 631 632 /* kernel/itimer.c */ 633 asmlinkage long compat_sys_getitimer(int which, 634 struct old_itimerval32 __user *it); 635 asmlinkage long compat_sys_setitimer(int which, 636 struct old_itimerval32 __user *in, 637 struct old_itimerval32 __user *out); 638 639 /* kernel/kexec.c */ 640 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 641 compat_ulong_t nr_segments, 642 struct compat_kexec_segment __user *, 643 compat_ulong_t flags); 644 645 /* kernel/posix-timers.c */ 646 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 647 struct compat_sigevent __user *timer_event_spec, 648 timer_t __user *created_timer_id); 649 650 /* kernel/ptrace.c */ 651 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 652 compat_long_t addr, compat_long_t data); 653 654 /* kernel/sched/core.c */ 655 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 656 unsigned int len, 657 compat_ulong_t __user *user_mask_ptr); 658 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 659 unsigned int len, 660 compat_ulong_t __user *user_mask_ptr); 661 662 /* kernel/signal.c */ 663 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 664 compat_stack_t __user *uoss_ptr); 665 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 666 compat_size_t sigsetsize); 667 #ifndef CONFIG_ODD_RT_SIGACTION 668 asmlinkage long compat_sys_rt_sigaction(int, 669 const struct compat_sigaction __user *, 670 struct compat_sigaction __user *, 671 compat_size_t); 672 #endif 673 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 674 compat_sigset_t __user *oset, 675 compat_size_t sigsetsize); 676 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 677 compat_size_t sigsetsize); 678 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 679 struct compat_siginfo __user *uinfo, 680 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 681 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 682 struct compat_siginfo __user *uinfo, 683 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 684 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 685 struct compat_siginfo __user *uinfo); 686 /* No generic prototype for rt_sigreturn */ 687 688 /* kernel/sys.c */ 689 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 690 asmlinkage long compat_sys_getrlimit(unsigned int resource, 691 struct compat_rlimit __user *rlim); 692 asmlinkage long compat_sys_setrlimit(unsigned int resource, 693 struct compat_rlimit __user *rlim); 694 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 695 696 /* kernel/time.c */ 697 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 698 struct timezone __user *tz); 699 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 700 struct timezone __user *tz); 701 702 /* kernel/timer.c */ 703 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 704 705 /* ipc/mqueue.c */ 706 asmlinkage long compat_sys_mq_open(const char __user *u_name, 707 int oflag, compat_mode_t mode, 708 struct compat_mq_attr __user *u_attr); 709 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 710 const struct compat_sigevent __user *u_notification); 711 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 712 const struct compat_mq_attr __user *u_mqstat, 713 struct compat_mq_attr __user *u_omqstat); 714 715 /* ipc/msg.c */ 716 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 717 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 718 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 719 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 720 compat_ssize_t msgsz, int msgflg); 721 722 /* ipc/sem.c */ 723 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 724 725 /* ipc/shm.c */ 726 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 727 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 728 729 /* net/socket.c */ 730 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 731 unsigned flags, struct sockaddr __user *addr, 732 int __user *addrlen); 733 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 734 char __user *optval, unsigned int optlen); 735 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 736 char __user *optval, int __user *optlen); 737 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 738 unsigned flags); 739 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 740 unsigned int flags); 741 742 /* mm/filemap.c: No generic prototype for readahead */ 743 744 /* security/keys/keyctl.c */ 745 asmlinkage long compat_sys_keyctl(u32 option, 746 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 747 748 /* arch/example/kernel/sys_example.c */ 749 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 750 const compat_uptr_t __user *envp); 751 752 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 753 754 /* mm/, CONFIG_MMU only */ 755 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 756 compat_ulong_t mode, 757 compat_ulong_t __user *nmask, 758 compat_ulong_t maxnode, compat_ulong_t flags); 759 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 760 compat_ulong_t __user *nmask, 761 compat_ulong_t maxnode, 762 compat_ulong_t addr, 763 compat_ulong_t flags); 764 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 765 compat_ulong_t maxnode); 766 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 767 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 768 const compat_ulong_t __user *new_nodes); 769 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 770 __u32 __user *pages, 771 const int __user *nodes, 772 int __user *status, 773 int flags); 774 775 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 776 compat_pid_t pid, int sig, 777 struct compat_siginfo __user *uinfo); 778 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 779 unsigned vlen, unsigned int flags, 780 struct __kernel_timespec __user *timeout); 781 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 782 unsigned vlen, unsigned int flags, 783 struct old_timespec32 __user *timeout); 784 asmlinkage long compat_sys_wait4(compat_pid_t pid, 785 compat_uint_t __user *stat_addr, int options, 786 struct compat_rusage __user *ru); 787 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 788 int, const char __user *); 789 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 790 struct file_handle __user *handle, 791 int flags); 792 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 793 unsigned vlen, unsigned int flags); 794 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 795 const struct compat_iovec __user *lvec, 796 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 797 compat_ulong_t riovcnt, compat_ulong_t flags); 798 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 799 const struct compat_iovec __user *lvec, 800 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 801 compat_ulong_t riovcnt, compat_ulong_t flags); 802 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 803 const compat_uptr_t __user *argv, 804 const compat_uptr_t __user *envp, int flags); 805 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 806 const struct compat_iovec __user *vec, 807 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 808 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 809 const struct compat_iovec __user *vec, 810 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 811 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 812 asmlinkage long compat_sys_readv64v2(unsigned long fd, 813 const struct compat_iovec __user *vec, 814 unsigned long vlen, loff_t pos, rwf_t flags); 815 #endif 816 817 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 818 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 819 const struct compat_iovec __user *vec, 820 unsigned long vlen, loff_t pos, rwf_t flags); 821 #endif 822 823 824 /* 825 * Deprecated system calls which are still defined in 826 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 827 */ 828 829 /* __ARCH_WANT_SYSCALL_NO_AT */ 830 asmlinkage long compat_sys_open(const char __user *filename, int flags, 831 umode_t mode); 832 833 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 834 asmlinkage long compat_sys_signalfd(int ufd, 835 const compat_sigset_t __user *sigmask, 836 compat_size_t sigsetsize); 837 838 /* __ARCH_WANT_SYSCALL_OFF_T */ 839 asmlinkage long compat_sys_newstat(const char __user *filename, 840 struct compat_stat __user *statbuf); 841 asmlinkage long compat_sys_newlstat(const char __user *filename, 842 struct compat_stat __user *statbuf); 843 844 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 845 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 846 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 847 struct old_timeval32 __user *tvp); 848 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 849 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 850 unsigned flags); 851 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 852 853 /* obsolete: fs/readdir.c */ 854 asmlinkage long compat_sys_old_readdir(unsigned int fd, 855 struct compat_old_linux_dirent __user *, 856 unsigned int count); 857 858 /* obsolete: fs/select.c */ 859 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 860 861 /* obsolete: ipc */ 862 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 863 864 /* obsolete: kernel/signal.c */ 865 #ifdef __ARCH_WANT_SYS_SIGPENDING 866 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 867 #endif 868 869 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 870 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 871 compat_old_sigset_t __user *oset); 872 #endif 873 #ifdef CONFIG_COMPAT_OLD_SIGACTION 874 asmlinkage long compat_sys_sigaction(int sig, 875 const struct compat_old_sigaction __user *act, 876 struct compat_old_sigaction __user *oact); 877 #endif 878 879 /* obsolete: net/socket.c */ 880 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 881 882 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 883 884 885 /* 886 * For most but not all architectures, "am I in a compat syscall?" and 887 * "am I a compat task?" are the same question. For architectures on which 888 * they aren't the same question, arch code can override in_compat_syscall. 889 */ 890 891 #ifndef in_compat_syscall 892 static inline bool in_compat_syscall(void) { return is_compat_task(); } 893 #endif 894 895 /** 896 * ns_to_old_timeval32 - Compat version of ns_to_timeval 897 * @nsec: the nanoseconds value to be converted 898 * 899 * Returns the old_timeval32 representation of the nsec parameter. 900 */ 901 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 902 { 903 struct __kernel_old_timeval tv; 904 struct old_timeval32 ctv; 905 906 tv = ns_to_kernel_old_timeval(nsec); 907 ctv.tv_sec = tv.tv_sec; 908 ctv.tv_usec = tv.tv_usec; 909 910 return ctv; 911 } 912 913 /* 914 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 915 * directly. Instead, use one of the functions which work equivalently, such 916 * as the kcompat_sys_xyzyyz() functions prototyped below. 917 */ 918 919 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 920 struct compat_statfs64 __user * buf); 921 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 922 struct compat_statfs64 __user * buf); 923 924 #else /* !CONFIG_COMPAT */ 925 926 #define is_compat_task() (0) 927 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 928 #define in_compat_syscall in_compat_syscall 929 static inline bool in_compat_syscall(void) { return false; } 930 931 #endif /* CONFIG_COMPAT */ 932 933 /* 934 * A pointer passed in from user mode. This should not 935 * be used for syscall parameters, just declare them 936 * as pointers because the syscall entry code will have 937 * appropriately converted them already. 938 */ 939 #ifndef compat_ptr 940 static inline void __user *compat_ptr(compat_uptr_t uptr) 941 { 942 return (void __user *)(unsigned long)uptr; 943 } 944 #endif 945 946 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 947 { 948 return (u32)(unsigned long)uptr; 949 } 950 951 #endif /* _LINUX_COMPAT_H */ 952