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