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