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 struct compat_iovec { 95 compat_uptr_t iov_base; 96 compat_size_t iov_len; 97 }; 98 99 #ifdef CONFIG_COMPAT 100 101 #ifndef compat_user_stack_pointer 102 #define compat_user_stack_pointer() current_user_stack_pointer() 103 #endif 104 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 105 typedef struct compat_sigaltstack { 106 compat_uptr_t ss_sp; 107 int ss_flags; 108 compat_size_t ss_size; 109 } compat_stack_t; 110 #endif 111 #ifndef COMPAT_MINSIGSTKSZ 112 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 113 #endif 114 115 #define compat_jiffies_to_clock_t(x) \ 116 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 117 118 typedef __compat_uid32_t compat_uid_t; 119 typedef __compat_gid32_t compat_gid_t; 120 121 struct compat_sel_arg_struct; 122 struct rusage; 123 124 struct old_itimerval32; 125 126 struct compat_tms { 127 compat_clock_t tms_utime; 128 compat_clock_t tms_stime; 129 compat_clock_t tms_cutime; 130 compat_clock_t tms_cstime; 131 }; 132 133 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 134 135 typedef struct { 136 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 137 } compat_sigset_t; 138 139 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 140 size_t sigsetsize); 141 142 struct compat_sigaction { 143 #ifndef __ARCH_HAS_IRIX_SIGACTION 144 compat_uptr_t sa_handler; 145 compat_ulong_t sa_flags; 146 #else 147 compat_uint_t sa_flags; 148 compat_uptr_t sa_handler; 149 #endif 150 #ifdef __ARCH_HAS_SA_RESTORER 151 compat_uptr_t sa_restorer; 152 #endif 153 compat_sigset_t sa_mask __packed; 154 }; 155 156 typedef union compat_sigval { 157 compat_int_t sival_int; 158 compat_uptr_t sival_ptr; 159 } compat_sigval_t; 160 161 typedef struct compat_siginfo { 162 int si_signo; 163 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 164 int si_errno; 165 int si_code; 166 #else 167 int si_code; 168 int si_errno; 169 #endif 170 171 union { 172 int _pad[128/sizeof(int) - 3]; 173 174 /* kill() */ 175 struct { 176 compat_pid_t _pid; /* sender's pid */ 177 __compat_uid32_t _uid; /* sender's uid */ 178 } _kill; 179 180 /* POSIX.1b timers */ 181 struct { 182 compat_timer_t _tid; /* timer id */ 183 int _overrun; /* overrun count */ 184 compat_sigval_t _sigval; /* same as below */ 185 } _timer; 186 187 /* POSIX.1b signals */ 188 struct { 189 compat_pid_t _pid; /* sender's pid */ 190 __compat_uid32_t _uid; /* sender's uid */ 191 compat_sigval_t _sigval; 192 } _rt; 193 194 /* SIGCHLD */ 195 struct { 196 compat_pid_t _pid; /* which child */ 197 __compat_uid32_t _uid; /* sender's uid */ 198 int _status; /* exit code */ 199 compat_clock_t _utime; 200 compat_clock_t _stime; 201 } _sigchld; 202 203 #ifdef CONFIG_X86_X32_ABI 204 /* SIGCHLD (x32 version) */ 205 struct { 206 compat_pid_t _pid; /* which child */ 207 __compat_uid32_t _uid; /* sender's uid */ 208 int _status; /* exit code */ 209 compat_s64 _utime; 210 compat_s64 _stime; 211 } _sigchld_x32; 212 #endif 213 214 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 215 struct { 216 compat_uptr_t _addr; /* faulting insn/memory ref. */ 217 #ifdef __ARCH_SI_TRAPNO 218 int _trapno; /* TRAP # which caused the signal */ 219 #endif 220 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 221 sizeof(short) : __alignof__(compat_uptr_t)) 222 union { 223 /* 224 * used when si_code=BUS_MCEERR_AR or 225 * used when si_code=BUS_MCEERR_AO 226 */ 227 short int _addr_lsb; /* Valid LSB of the reported address. */ 228 /* used when si_code=SEGV_BNDERR */ 229 struct { 230 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 231 compat_uptr_t _lower; 232 compat_uptr_t _upper; 233 } _addr_bnd; 234 /* used when si_code=SEGV_PKUERR */ 235 struct { 236 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 237 u32 _pkey; 238 } _addr_pkey; 239 /* used when si_code=TRAP_PERF */ 240 compat_ulong_t _perf; 241 }; 242 } _sigfault; 243 244 /* SIGPOLL */ 245 struct { 246 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 247 int _fd; 248 } _sigpoll; 249 250 struct { 251 compat_uptr_t _call_addr; /* calling user insn */ 252 int _syscall; /* triggering system call number */ 253 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 254 } _sigsys; 255 } _sifields; 256 } compat_siginfo_t; 257 258 struct compat_rlimit { 259 compat_ulong_t rlim_cur; 260 compat_ulong_t rlim_max; 261 }; 262 263 struct compat_rusage { 264 struct old_timeval32 ru_utime; 265 struct old_timeval32 ru_stime; 266 compat_long_t ru_maxrss; 267 compat_long_t ru_ixrss; 268 compat_long_t ru_idrss; 269 compat_long_t ru_isrss; 270 compat_long_t ru_minflt; 271 compat_long_t ru_majflt; 272 compat_long_t ru_nswap; 273 compat_long_t ru_inblock; 274 compat_long_t ru_oublock; 275 compat_long_t ru_msgsnd; 276 compat_long_t ru_msgrcv; 277 compat_long_t ru_nsignals; 278 compat_long_t ru_nvcsw; 279 compat_long_t ru_nivcsw; 280 }; 281 282 extern int put_compat_rusage(const struct rusage *, 283 struct compat_rusage __user *); 284 285 struct compat_siginfo; 286 struct __compat_aio_sigset; 287 288 struct compat_dirent { 289 u32 d_ino; 290 compat_off_t d_off; 291 u16 d_reclen; 292 char d_name[256]; 293 }; 294 295 struct compat_ustat { 296 compat_daddr_t f_tfree; 297 compat_ino_t f_tinode; 298 char f_fname[6]; 299 char f_fpack[6]; 300 }; 301 302 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 303 304 typedef struct compat_sigevent { 305 compat_sigval_t sigev_value; 306 compat_int_t sigev_signo; 307 compat_int_t sigev_notify; 308 union { 309 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 310 compat_int_t _tid; 311 312 struct { 313 compat_uptr_t _function; 314 compat_uptr_t _attribute; 315 } _sigev_thread; 316 } _sigev_un; 317 } compat_sigevent_t; 318 319 struct compat_ifmap { 320 compat_ulong_t mem_start; 321 compat_ulong_t mem_end; 322 unsigned short base_addr; 323 unsigned char irq; 324 unsigned char dma; 325 unsigned char port; 326 }; 327 328 struct compat_if_settings { 329 unsigned int type; /* Type of physical device or protocol */ 330 unsigned int size; /* Size of the data allocated by the caller */ 331 compat_uptr_t ifs_ifsu; /* union of pointers */ 332 }; 333 334 struct compat_ifreq { 335 union { 336 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 337 } ifr_ifrn; 338 union { 339 struct sockaddr ifru_addr; 340 struct sockaddr ifru_dstaddr; 341 struct sockaddr ifru_broadaddr; 342 struct sockaddr ifru_netmask; 343 struct sockaddr ifru_hwaddr; 344 short ifru_flags; 345 compat_int_t ifru_ivalue; 346 compat_int_t ifru_mtu; 347 struct compat_ifmap ifru_map; 348 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 349 char ifru_newname[IFNAMSIZ]; 350 compat_caddr_t ifru_data; 351 struct compat_if_settings ifru_settings; 352 } ifr_ifru; 353 }; 354 355 struct compat_ifconf { 356 compat_int_t ifc_len; /* size of buffer */ 357 compat_caddr_t ifcbuf; 358 }; 359 360 struct compat_robust_list { 361 compat_uptr_t next; 362 }; 363 364 struct compat_robust_list_head { 365 struct compat_robust_list list; 366 compat_long_t futex_offset; 367 compat_uptr_t list_op_pending; 368 }; 369 370 #ifdef CONFIG_COMPAT_OLD_SIGACTION 371 struct compat_old_sigaction { 372 compat_uptr_t sa_handler; 373 compat_old_sigset_t sa_mask; 374 compat_ulong_t sa_flags; 375 compat_uptr_t sa_restorer; 376 }; 377 #endif 378 379 struct compat_keyctl_kdf_params { 380 compat_uptr_t hashname; 381 compat_uptr_t otherinfo; 382 __u32 otherinfolen; 383 __u32 __spare[8]; 384 }; 385 386 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 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 400 401 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 402 403 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 404 unsigned long bitmap_size); 405 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 406 unsigned long bitmap_size); 407 void copy_siginfo_to_external32(struct compat_siginfo *to, 408 const struct kernel_siginfo *from); 409 int copy_siginfo_from_user32(kernel_siginfo_t *to, 410 const struct compat_siginfo __user *from); 411 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 412 const kernel_siginfo_t *from); 413 #ifndef copy_siginfo_to_user32 414 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 415 #endif 416 int get_compat_sigevent(struct sigevent *event, 417 const struct compat_sigevent __user *u_event); 418 419 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 420 421 /* 422 * Defined inline such that size can be compile time constant, which avoids 423 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 424 */ 425 static inline int 426 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 427 unsigned int size) 428 { 429 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 430 #ifdef __BIG_ENDIAN 431 compat_sigset_t v; 432 switch (_NSIG_WORDS) { 433 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 434 fallthrough; 435 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 436 fallthrough; 437 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 438 fallthrough; 439 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 440 } 441 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 442 #else 443 return copy_to_user(compat, set, size) ? -EFAULT : 0; 444 #endif 445 } 446 447 #ifdef CONFIG_CPU_BIG_ENDIAN 448 #define unsafe_put_compat_sigset(compat, set, label) do { \ 449 compat_sigset_t __user *__c = compat; \ 450 const sigset_t *__s = set; \ 451 \ 452 switch (_NSIG_WORDS) { \ 453 case 4: \ 454 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 455 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 456 fallthrough; \ 457 case 3: \ 458 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 459 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 460 fallthrough; \ 461 case 2: \ 462 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 463 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 464 fallthrough; \ 465 case 1: \ 466 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 467 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 468 } \ 469 } while (0) 470 471 #define unsafe_get_compat_sigset(set, compat, label) do { \ 472 const compat_sigset_t __user *__c = compat; \ 473 compat_sigset_word hi, lo; \ 474 sigset_t *__s = set; \ 475 \ 476 switch (_NSIG_WORDS) { \ 477 case 4: \ 478 unsafe_get_user(lo, &__c->sig[7], label); \ 479 unsafe_get_user(hi, &__c->sig[6], label); \ 480 __s->sig[3] = hi | (((long)lo) << 32); \ 481 fallthrough; \ 482 case 3: \ 483 unsafe_get_user(lo, &__c->sig[5], label); \ 484 unsafe_get_user(hi, &__c->sig[4], label); \ 485 __s->sig[2] = hi | (((long)lo) << 32); \ 486 fallthrough; \ 487 case 2: \ 488 unsafe_get_user(lo, &__c->sig[3], label); \ 489 unsafe_get_user(hi, &__c->sig[2], label); \ 490 __s->sig[1] = hi | (((long)lo) << 32); \ 491 fallthrough; \ 492 case 1: \ 493 unsafe_get_user(lo, &__c->sig[1], label); \ 494 unsafe_get_user(hi, &__c->sig[0], label); \ 495 __s->sig[0] = hi | (((long)lo) << 32); \ 496 } \ 497 } while (0) 498 #else 499 #define unsafe_put_compat_sigset(compat, set, label) do { \ 500 compat_sigset_t __user *__c = compat; \ 501 const sigset_t *__s = set; \ 502 \ 503 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 504 } while (0) 505 506 #define unsafe_get_compat_sigset(set, compat, label) do { \ 507 const compat_sigset_t __user *__c = compat; \ 508 sigset_t *__s = set; \ 509 \ 510 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ 511 } while (0) 512 #endif 513 514 extern int compat_ptrace_request(struct task_struct *child, 515 compat_long_t request, 516 compat_ulong_t addr, compat_ulong_t data); 517 518 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 519 compat_ulong_t addr, compat_ulong_t data); 520 521 struct epoll_event; /* fortunately, this one is fixed-layout */ 522 523 extern void __user *compat_alloc_user_space(unsigned long len); 524 525 int compat_restore_altstack(const compat_stack_t __user *uss); 526 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 527 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 528 compat_stack_t __user *__uss = uss; \ 529 struct task_struct *t = current; \ 530 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 531 &__uss->ss_sp, label); \ 532 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 533 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 534 if (t->sas_ss_flags & SS_AUTODISARM) \ 535 sas_ss_reset(t); \ 536 } while (0); 537 538 /* 539 * These syscall function prototypes are kept in the same order as 540 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 541 * go below. 542 * 543 * Please note that these prototypes here are only provided for information 544 * purposes, for static analysis, and for linking from the syscall table. 545 * These functions should not be called elsewhere from kernel code. 546 * 547 * As the syscall calling convention may be different from the default 548 * for architectures overriding the syscall calling convention, do not 549 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 550 */ 551 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 552 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 553 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 554 u32 __user *iocb); 555 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 556 compat_long_t min_nr, 557 compat_long_t nr, 558 struct io_event __user *events, 559 struct old_timespec32 __user *timeout, 560 const struct __compat_aio_sigset __user *usig); 561 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 562 compat_long_t min_nr, 563 compat_long_t nr, 564 struct io_event __user *events, 565 struct __kernel_timespec __user *timeout, 566 const struct __compat_aio_sigset __user *usig); 567 568 /* fs/cookies.c */ 569 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 570 571 /* fs/eventpoll.c */ 572 asmlinkage long compat_sys_epoll_pwait(int epfd, 573 struct epoll_event __user *events, 574 int maxevents, int timeout, 575 const compat_sigset_t __user *sigmask, 576 compat_size_t sigsetsize); 577 asmlinkage long compat_sys_epoll_pwait2(int epfd, 578 struct epoll_event __user *events, 579 int maxevents, 580 const struct __kernel_timespec __user *timeout, 581 const compat_sigset_t __user *sigmask, 582 compat_size_t sigsetsize); 583 584 /* fs/fcntl.c */ 585 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 586 compat_ulong_t arg); 587 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 588 compat_ulong_t arg); 589 590 /* fs/ioctl.c */ 591 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 592 compat_ulong_t arg); 593 594 /* fs/open.c */ 595 asmlinkage long compat_sys_statfs(const char __user *pathname, 596 struct compat_statfs __user *buf); 597 asmlinkage long compat_sys_statfs64(const char __user *pathname, 598 compat_size_t sz, 599 struct compat_statfs64 __user *buf); 600 asmlinkage long compat_sys_fstatfs(unsigned int fd, 601 struct compat_statfs __user *buf); 602 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 603 struct compat_statfs64 __user *buf); 604 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 605 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 606 /* No generic prototype for truncate64, ftruncate64, fallocate */ 607 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 608 int flags, umode_t mode); 609 610 /* fs/readdir.c */ 611 asmlinkage long compat_sys_getdents(unsigned int fd, 612 struct compat_linux_dirent __user *dirent, 613 unsigned int count); 614 615 /* fs/read_write.c */ 616 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 617 /* No generic prototype for pread64 and pwrite64 */ 618 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 619 const struct iovec __user *vec, 620 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 621 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 622 const struct iovec __user *vec, 623 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 624 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 625 asmlinkage long compat_sys_preadv64(unsigned long fd, 626 const struct iovec __user *vec, 627 unsigned long vlen, loff_t pos); 628 #endif 629 630 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 631 asmlinkage long compat_sys_pwritev64(unsigned long fd, 632 const struct iovec __user *vec, 633 unsigned long vlen, loff_t pos); 634 #endif 635 636 /* fs/sendfile.c */ 637 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 638 compat_off_t __user *offset, compat_size_t count); 639 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 640 compat_loff_t __user *offset, compat_size_t count); 641 642 /* fs/select.c */ 643 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 644 compat_ulong_t __user *outp, 645 compat_ulong_t __user *exp, 646 struct old_timespec32 __user *tsp, 647 void __user *sig); 648 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 649 compat_ulong_t __user *outp, 650 compat_ulong_t __user *exp, 651 struct __kernel_timespec __user *tsp, 652 void __user *sig); 653 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 654 unsigned int nfds, 655 struct old_timespec32 __user *tsp, 656 const compat_sigset_t __user *sigmask, 657 compat_size_t sigsetsize); 658 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 659 unsigned int nfds, 660 struct __kernel_timespec __user *tsp, 661 const compat_sigset_t __user *sigmask, 662 compat_size_t sigsetsize); 663 664 /* fs/signalfd.c */ 665 asmlinkage long compat_sys_signalfd4(int ufd, 666 const compat_sigset_t __user *sigmask, 667 compat_size_t sigsetsize, int flags); 668 669 /* fs/stat.c */ 670 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 671 const char __user *filename, 672 struct compat_stat __user *statbuf, 673 int flag); 674 asmlinkage long compat_sys_newfstat(unsigned int fd, 675 struct compat_stat __user *statbuf); 676 677 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 678 679 /* kernel/exit.c */ 680 asmlinkage long compat_sys_waitid(int, compat_pid_t, 681 struct compat_siginfo __user *, int, 682 struct compat_rusage __user *); 683 684 685 686 /* kernel/futex.c */ 687 asmlinkage long 688 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 689 compat_size_t len); 690 asmlinkage long 691 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 692 compat_size_t __user *len_ptr); 693 694 /* kernel/itimer.c */ 695 asmlinkage long compat_sys_getitimer(int which, 696 struct old_itimerval32 __user *it); 697 asmlinkage long compat_sys_setitimer(int which, 698 struct old_itimerval32 __user *in, 699 struct old_itimerval32 __user *out); 700 701 /* kernel/kexec.c */ 702 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 703 compat_ulong_t nr_segments, 704 struct compat_kexec_segment __user *, 705 compat_ulong_t flags); 706 707 /* kernel/posix-timers.c */ 708 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 709 struct compat_sigevent __user *timer_event_spec, 710 timer_t __user *created_timer_id); 711 712 /* kernel/ptrace.c */ 713 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 714 compat_long_t addr, compat_long_t data); 715 716 /* kernel/sched/core.c */ 717 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 718 unsigned int len, 719 compat_ulong_t __user *user_mask_ptr); 720 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 721 unsigned int len, 722 compat_ulong_t __user *user_mask_ptr); 723 724 /* kernel/signal.c */ 725 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 726 compat_stack_t __user *uoss_ptr); 727 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 728 compat_size_t sigsetsize); 729 #ifndef CONFIG_ODD_RT_SIGACTION 730 asmlinkage long compat_sys_rt_sigaction(int, 731 const struct compat_sigaction __user *, 732 struct compat_sigaction __user *, 733 compat_size_t); 734 #endif 735 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 736 compat_sigset_t __user *oset, 737 compat_size_t sigsetsize); 738 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 739 compat_size_t sigsetsize); 740 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 741 struct compat_siginfo __user *uinfo, 742 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 743 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 744 struct compat_siginfo __user *uinfo, 745 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 746 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 747 struct compat_siginfo __user *uinfo); 748 /* No generic prototype for rt_sigreturn */ 749 750 /* kernel/sys.c */ 751 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 752 asmlinkage long compat_sys_getrlimit(unsigned int resource, 753 struct compat_rlimit __user *rlim); 754 asmlinkage long compat_sys_setrlimit(unsigned int resource, 755 struct compat_rlimit __user *rlim); 756 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 757 758 /* kernel/time.c */ 759 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 760 struct timezone __user *tz); 761 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 762 struct timezone __user *tz); 763 764 /* kernel/timer.c */ 765 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 766 767 /* ipc/mqueue.c */ 768 asmlinkage long compat_sys_mq_open(const char __user *u_name, 769 int oflag, compat_mode_t mode, 770 struct compat_mq_attr __user *u_attr); 771 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 772 const struct compat_sigevent __user *u_notification); 773 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 774 const struct compat_mq_attr __user *u_mqstat, 775 struct compat_mq_attr __user *u_omqstat); 776 777 /* ipc/msg.c */ 778 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 779 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 780 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 781 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 782 compat_ssize_t msgsz, int msgflg); 783 784 /* ipc/sem.c */ 785 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 786 787 /* ipc/shm.c */ 788 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 789 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 790 791 /* net/socket.c */ 792 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 793 unsigned flags, struct sockaddr __user *addr, 794 int __user *addrlen); 795 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 796 unsigned flags); 797 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 798 unsigned int flags); 799 800 /* mm/filemap.c: No generic prototype for readahead */ 801 802 /* security/keys/keyctl.c */ 803 asmlinkage long compat_sys_keyctl(u32 option, 804 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 805 806 /* arch/example/kernel/sys_example.c */ 807 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 808 const compat_uptr_t __user *envp); 809 810 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 811 812 /* mm/, CONFIG_MMU only */ 813 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 814 compat_ulong_t mode, 815 compat_ulong_t __user *nmask, 816 compat_ulong_t maxnode, compat_ulong_t flags); 817 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 818 compat_ulong_t __user *nmask, 819 compat_ulong_t maxnode, 820 compat_ulong_t addr, 821 compat_ulong_t flags); 822 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 823 compat_ulong_t maxnode); 824 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 825 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 826 const compat_ulong_t __user *new_nodes); 827 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 828 __u32 __user *pages, 829 const int __user *nodes, 830 int __user *status, 831 int flags); 832 833 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 834 compat_pid_t pid, int sig, 835 struct compat_siginfo __user *uinfo); 836 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 837 unsigned vlen, unsigned int flags, 838 struct __kernel_timespec __user *timeout); 839 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 840 unsigned vlen, unsigned int flags, 841 struct old_timespec32 __user *timeout); 842 asmlinkage long compat_sys_wait4(compat_pid_t pid, 843 compat_uint_t __user *stat_addr, int options, 844 struct compat_rusage __user *ru); 845 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 846 int, const char __user *); 847 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 848 struct file_handle __user *handle, 849 int flags); 850 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 851 unsigned vlen, unsigned int flags); 852 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 853 const compat_uptr_t __user *argv, 854 const compat_uptr_t __user *envp, int flags); 855 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 856 const struct iovec __user *vec, 857 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 858 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 859 const struct iovec __user *vec, 860 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 861 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 862 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 863 const struct iovec __user *vec, 864 unsigned long vlen, loff_t pos, rwf_t flags); 865 #endif 866 867 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 868 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 869 const struct iovec __user *vec, 870 unsigned long vlen, loff_t pos, rwf_t flags); 871 #endif 872 873 874 /* 875 * Deprecated system calls which are still defined in 876 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 877 */ 878 879 /* __ARCH_WANT_SYSCALL_NO_AT */ 880 asmlinkage long compat_sys_open(const char __user *filename, int flags, 881 umode_t mode); 882 883 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 884 asmlinkage long compat_sys_signalfd(int ufd, 885 const compat_sigset_t __user *sigmask, 886 compat_size_t sigsetsize); 887 888 /* __ARCH_WANT_SYSCALL_OFF_T */ 889 asmlinkage long compat_sys_newstat(const char __user *filename, 890 struct compat_stat __user *statbuf); 891 asmlinkage long compat_sys_newlstat(const char __user *filename, 892 struct compat_stat __user *statbuf); 893 894 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 895 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 896 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 897 struct old_timeval32 __user *tvp); 898 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 899 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 900 unsigned flags); 901 902 /* obsolete: fs/readdir.c */ 903 asmlinkage long compat_sys_old_readdir(unsigned int fd, 904 struct compat_old_linux_dirent __user *, 905 unsigned int count); 906 907 /* obsolete: fs/select.c */ 908 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 909 910 /* obsolete: ipc */ 911 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 912 913 /* obsolete: kernel/signal.c */ 914 #ifdef __ARCH_WANT_SYS_SIGPENDING 915 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 916 #endif 917 918 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 919 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 920 compat_old_sigset_t __user *oset); 921 #endif 922 #ifdef CONFIG_COMPAT_OLD_SIGACTION 923 asmlinkage long compat_sys_sigaction(int sig, 924 const struct compat_old_sigaction __user *act, 925 struct compat_old_sigaction __user *oact); 926 #endif 927 928 /* obsolete: net/socket.c */ 929 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 930 931 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 932 933 934 /* 935 * For most but not all architectures, "am I in a compat syscall?" and 936 * "am I a compat task?" are the same question. For architectures on which 937 * they aren't the same question, arch code can override in_compat_syscall. 938 */ 939 940 #ifndef in_compat_syscall 941 static inline bool in_compat_syscall(void) { return is_compat_task(); } 942 #endif 943 944 /** 945 * ns_to_old_timeval32 - Compat version of ns_to_timeval 946 * @nsec: the nanoseconds value to be converted 947 * 948 * Returns the old_timeval32 representation of the nsec parameter. 949 */ 950 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 951 { 952 struct __kernel_old_timeval tv; 953 struct old_timeval32 ctv; 954 955 tv = ns_to_kernel_old_timeval(nsec); 956 ctv.tv_sec = tv.tv_sec; 957 ctv.tv_usec = tv.tv_usec; 958 959 return ctv; 960 } 961 962 /* 963 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 964 * directly. Instead, use one of the functions which work equivalently, such 965 * as the kcompat_sys_xyzyyz() functions prototyped below. 966 */ 967 968 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 969 struct compat_statfs64 __user * buf); 970 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 971 struct compat_statfs64 __user * buf); 972 973 #else /* !CONFIG_COMPAT */ 974 975 #define is_compat_task() (0) 976 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 977 #define in_compat_syscall in_compat_syscall 978 static inline bool in_compat_syscall(void) { return false; } 979 980 #endif /* CONFIG_COMPAT */ 981 982 /* 983 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 984 * types, and will need special compat treatment for that. Most architectures 985 * don't need that special handling even for compat syscalls. 986 */ 987 #ifndef compat_need_64bit_alignment_fixup 988 #define compat_need_64bit_alignment_fixup() false 989 #endif 990 991 /* 992 * A pointer passed in from user mode. This should not 993 * be used for syscall parameters, just declare them 994 * as pointers because the syscall entry code will have 995 * appropriately converted them already. 996 */ 997 #ifndef compat_ptr 998 static inline void __user *compat_ptr(compat_uptr_t uptr) 999 { 1000 return (void __user *)(unsigned long)uptr; 1001 } 1002 #endif 1003 1004 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 1005 { 1006 return (u32)(unsigned long)uptr; 1007 } 1008 1009 #endif /* _LINUX_COMPAT_H */ 1010