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 }; 240 } _sigfault; 241 242 /* SIGPOLL */ 243 struct { 244 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 245 int _fd; 246 } _sigpoll; 247 248 struct { 249 compat_uptr_t _call_addr; /* calling user insn */ 250 int _syscall; /* triggering system call number */ 251 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 252 } _sigsys; 253 } _sifields; 254 } compat_siginfo_t; 255 256 struct compat_rlimit { 257 compat_ulong_t rlim_cur; 258 compat_ulong_t rlim_max; 259 }; 260 261 struct compat_rusage { 262 struct old_timeval32 ru_utime; 263 struct old_timeval32 ru_stime; 264 compat_long_t ru_maxrss; 265 compat_long_t ru_ixrss; 266 compat_long_t ru_idrss; 267 compat_long_t ru_isrss; 268 compat_long_t ru_minflt; 269 compat_long_t ru_majflt; 270 compat_long_t ru_nswap; 271 compat_long_t ru_inblock; 272 compat_long_t ru_oublock; 273 compat_long_t ru_msgsnd; 274 compat_long_t ru_msgrcv; 275 compat_long_t ru_nsignals; 276 compat_long_t ru_nvcsw; 277 compat_long_t ru_nivcsw; 278 }; 279 280 extern int put_compat_rusage(const struct rusage *, 281 struct compat_rusage __user *); 282 283 struct compat_siginfo; 284 struct __compat_aio_sigset; 285 286 struct compat_dirent { 287 u32 d_ino; 288 compat_off_t d_off; 289 u16 d_reclen; 290 char d_name[256]; 291 }; 292 293 struct compat_ustat { 294 compat_daddr_t f_tfree; 295 compat_ino_t f_tinode; 296 char f_fname[6]; 297 char f_fpack[6]; 298 }; 299 300 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 301 302 typedef struct compat_sigevent { 303 compat_sigval_t sigev_value; 304 compat_int_t sigev_signo; 305 compat_int_t sigev_notify; 306 union { 307 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 308 compat_int_t _tid; 309 310 struct { 311 compat_uptr_t _function; 312 compat_uptr_t _attribute; 313 } _sigev_thread; 314 } _sigev_un; 315 } compat_sigevent_t; 316 317 struct compat_ifmap { 318 compat_ulong_t mem_start; 319 compat_ulong_t mem_end; 320 unsigned short base_addr; 321 unsigned char irq; 322 unsigned char dma; 323 unsigned char port; 324 }; 325 326 struct compat_if_settings { 327 unsigned int type; /* Type of physical device or protocol */ 328 unsigned int size; /* Size of the data allocated by the caller */ 329 compat_uptr_t ifs_ifsu; /* union of pointers */ 330 }; 331 332 struct compat_ifreq { 333 union { 334 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 335 } ifr_ifrn; 336 union { 337 struct sockaddr ifru_addr; 338 struct sockaddr ifru_dstaddr; 339 struct sockaddr ifru_broadaddr; 340 struct sockaddr ifru_netmask; 341 struct sockaddr ifru_hwaddr; 342 short ifru_flags; 343 compat_int_t ifru_ivalue; 344 compat_int_t ifru_mtu; 345 struct compat_ifmap ifru_map; 346 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 347 char ifru_newname[IFNAMSIZ]; 348 compat_caddr_t ifru_data; 349 struct compat_if_settings ifru_settings; 350 } ifr_ifru; 351 }; 352 353 struct compat_ifconf { 354 compat_int_t ifc_len; /* size of buffer */ 355 compat_caddr_t ifcbuf; 356 }; 357 358 struct compat_robust_list { 359 compat_uptr_t next; 360 }; 361 362 struct compat_robust_list_head { 363 struct compat_robust_list list; 364 compat_long_t futex_offset; 365 compat_uptr_t list_op_pending; 366 }; 367 368 #ifdef CONFIG_COMPAT_OLD_SIGACTION 369 struct compat_old_sigaction { 370 compat_uptr_t sa_handler; 371 compat_old_sigset_t sa_mask; 372 compat_ulong_t sa_flags; 373 compat_uptr_t sa_restorer; 374 }; 375 #endif 376 377 struct compat_keyctl_kdf_params { 378 compat_uptr_t hashname; 379 compat_uptr_t otherinfo; 380 __u32 otherinfolen; 381 __u32 __spare[8]; 382 }; 383 384 struct compat_statfs; 385 struct compat_statfs64; 386 struct compat_old_linux_dirent; 387 struct compat_linux_dirent; 388 struct linux_dirent64; 389 struct compat_msghdr; 390 struct compat_mmsghdr; 391 struct compat_sysinfo; 392 struct compat_sysctl_args; 393 struct compat_kexec_segment; 394 struct compat_mq_attr; 395 struct compat_msgbuf; 396 397 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 398 399 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 400 401 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 402 unsigned long bitmap_size); 403 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 404 unsigned long bitmap_size); 405 void copy_siginfo_to_external32(struct compat_siginfo *to, 406 const struct kernel_siginfo *from); 407 int copy_siginfo_from_user32(kernel_siginfo_t *to, 408 const struct compat_siginfo __user *from); 409 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 410 const kernel_siginfo_t *from); 411 #ifndef copy_siginfo_to_user32 412 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 413 #endif 414 int get_compat_sigevent(struct sigevent *event, 415 const struct compat_sigevent __user *u_event); 416 417 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 418 419 /* 420 * Defined inline such that size can be compile time constant, which avoids 421 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 422 */ 423 static inline int 424 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 425 unsigned int size) 426 { 427 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 428 #ifdef __BIG_ENDIAN 429 compat_sigset_t v; 430 switch (_NSIG_WORDS) { 431 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 432 fallthrough; 433 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 434 fallthrough; 435 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 436 fallthrough; 437 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 438 } 439 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 440 #else 441 return copy_to_user(compat, set, size) ? -EFAULT : 0; 442 #endif 443 } 444 445 #ifdef CONFIG_CPU_BIG_ENDIAN 446 #define unsafe_put_compat_sigset(compat, set, label) do { \ 447 compat_sigset_t __user *__c = compat; \ 448 const sigset_t *__s = set; \ 449 \ 450 switch (_NSIG_WORDS) { \ 451 case 4: \ 452 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 453 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 454 fallthrough; \ 455 case 3: \ 456 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 457 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 458 fallthrough; \ 459 case 2: \ 460 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 461 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 462 fallthrough; \ 463 case 1: \ 464 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 465 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 466 } \ 467 } while (0) 468 469 #define unsafe_get_compat_sigset(set, compat, label) do { \ 470 const compat_sigset_t __user *__c = compat; \ 471 compat_sigset_word hi, lo; \ 472 sigset_t *__s = set; \ 473 \ 474 switch (_NSIG_WORDS) { \ 475 case 4: \ 476 unsafe_get_user(lo, &__c->sig[7], label); \ 477 unsafe_get_user(hi, &__c->sig[6], label); \ 478 __s->sig[3] = hi | (((long)lo) << 32); \ 479 fallthrough; \ 480 case 3: \ 481 unsafe_get_user(lo, &__c->sig[5], label); \ 482 unsafe_get_user(hi, &__c->sig[4], label); \ 483 __s->sig[2] = hi | (((long)lo) << 32); \ 484 fallthrough; \ 485 case 2: \ 486 unsafe_get_user(lo, &__c->sig[3], label); \ 487 unsafe_get_user(hi, &__c->sig[2], label); \ 488 __s->sig[1] = hi | (((long)lo) << 32); \ 489 fallthrough; \ 490 case 1: \ 491 unsafe_get_user(lo, &__c->sig[1], label); \ 492 unsafe_get_user(hi, &__c->sig[0], label); \ 493 __s->sig[0] = hi | (((long)lo) << 32); \ 494 } \ 495 } while (0) 496 #else 497 #define unsafe_put_compat_sigset(compat, set, label) do { \ 498 compat_sigset_t __user *__c = compat; \ 499 const sigset_t *__s = set; \ 500 \ 501 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 502 } while (0) 503 504 #define unsafe_get_compat_sigset(set, compat, label) do { \ 505 const compat_sigset_t __user *__c = compat; \ 506 sigset_t *__s = set; \ 507 \ 508 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ 509 } while (0) 510 #endif 511 512 extern int compat_ptrace_request(struct task_struct *child, 513 compat_long_t request, 514 compat_ulong_t addr, compat_ulong_t data); 515 516 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 517 compat_ulong_t addr, compat_ulong_t data); 518 519 struct epoll_event; /* fortunately, this one is fixed-layout */ 520 521 extern void __user *compat_alloc_user_space(unsigned long len); 522 523 int compat_restore_altstack(const compat_stack_t __user *uss); 524 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 525 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 526 compat_stack_t __user *__uss = uss; \ 527 struct task_struct *t = current; \ 528 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 529 &__uss->ss_sp, label); \ 530 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 531 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 532 if (t->sas_ss_flags & SS_AUTODISARM) \ 533 sas_ss_reset(t); \ 534 } while (0); 535 536 /* 537 * These syscall function prototypes are kept in the same order as 538 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 539 * go below. 540 * 541 * Please note that these prototypes here are only provided for information 542 * purposes, for static analysis, and for linking from the syscall table. 543 * These functions should not be called elsewhere from kernel code. 544 * 545 * As the syscall calling convention may be different from the default 546 * for architectures overriding the syscall calling convention, do not 547 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 548 */ 549 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 550 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 551 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 552 u32 __user *iocb); 553 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 554 compat_long_t min_nr, 555 compat_long_t nr, 556 struct io_event __user *events, 557 struct old_timespec32 __user *timeout, 558 const struct __compat_aio_sigset __user *usig); 559 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 560 compat_long_t min_nr, 561 compat_long_t nr, 562 struct io_event __user *events, 563 struct __kernel_timespec __user *timeout, 564 const struct __compat_aio_sigset __user *usig); 565 566 /* fs/cookies.c */ 567 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 568 569 /* fs/eventpoll.c */ 570 asmlinkage long compat_sys_epoll_pwait(int epfd, 571 struct epoll_event __user *events, 572 int maxevents, int timeout, 573 const compat_sigset_t __user *sigmask, 574 compat_size_t sigsetsize); 575 asmlinkage long compat_sys_epoll_pwait2(int epfd, 576 struct epoll_event __user *events, 577 int maxevents, 578 const struct __kernel_timespec __user *timeout, 579 const compat_sigset_t __user *sigmask, 580 compat_size_t sigsetsize); 581 582 /* fs/fcntl.c */ 583 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 584 compat_ulong_t arg); 585 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 586 compat_ulong_t arg); 587 588 /* fs/ioctl.c */ 589 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 590 compat_ulong_t arg); 591 592 /* fs/open.c */ 593 asmlinkage long compat_sys_statfs(const char __user *pathname, 594 struct compat_statfs __user *buf); 595 asmlinkage long compat_sys_statfs64(const char __user *pathname, 596 compat_size_t sz, 597 struct compat_statfs64 __user *buf); 598 asmlinkage long compat_sys_fstatfs(unsigned int fd, 599 struct compat_statfs __user *buf); 600 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 601 struct compat_statfs64 __user *buf); 602 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 603 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 604 /* No generic prototype for truncate64, ftruncate64, fallocate */ 605 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 606 int flags, umode_t mode); 607 608 /* fs/readdir.c */ 609 asmlinkage long compat_sys_getdents(unsigned int fd, 610 struct compat_linux_dirent __user *dirent, 611 unsigned int count); 612 613 /* fs/read_write.c */ 614 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 615 /* No generic prototype for pread64 and pwrite64 */ 616 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 617 const struct iovec __user *vec, 618 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 619 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 620 const struct iovec __user *vec, 621 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 622 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 623 asmlinkage long compat_sys_preadv64(unsigned long fd, 624 const struct iovec __user *vec, 625 unsigned long vlen, loff_t pos); 626 #endif 627 628 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 629 asmlinkage long compat_sys_pwritev64(unsigned long fd, 630 const struct iovec __user *vec, 631 unsigned long vlen, loff_t pos); 632 #endif 633 634 /* fs/sendfile.c */ 635 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 636 compat_off_t __user *offset, compat_size_t count); 637 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 638 compat_loff_t __user *offset, compat_size_t count); 639 640 /* fs/select.c */ 641 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 642 compat_ulong_t __user *outp, 643 compat_ulong_t __user *exp, 644 struct old_timespec32 __user *tsp, 645 void __user *sig); 646 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 647 compat_ulong_t __user *outp, 648 compat_ulong_t __user *exp, 649 struct __kernel_timespec __user *tsp, 650 void __user *sig); 651 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 652 unsigned int nfds, 653 struct old_timespec32 __user *tsp, 654 const compat_sigset_t __user *sigmask, 655 compat_size_t sigsetsize); 656 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 657 unsigned int nfds, 658 struct __kernel_timespec __user *tsp, 659 const compat_sigset_t __user *sigmask, 660 compat_size_t sigsetsize); 661 662 /* fs/signalfd.c */ 663 asmlinkage long compat_sys_signalfd4(int ufd, 664 const compat_sigset_t __user *sigmask, 665 compat_size_t sigsetsize, int flags); 666 667 /* fs/stat.c */ 668 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 669 const char __user *filename, 670 struct compat_stat __user *statbuf, 671 int flag); 672 asmlinkage long compat_sys_newfstat(unsigned int fd, 673 struct compat_stat __user *statbuf); 674 675 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 676 677 /* kernel/exit.c */ 678 asmlinkage long compat_sys_waitid(int, compat_pid_t, 679 struct compat_siginfo __user *, int, 680 struct compat_rusage __user *); 681 682 683 684 /* kernel/futex.c */ 685 asmlinkage long 686 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 687 compat_size_t len); 688 asmlinkage long 689 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 690 compat_size_t __user *len_ptr); 691 692 /* kernel/itimer.c */ 693 asmlinkage long compat_sys_getitimer(int which, 694 struct old_itimerval32 __user *it); 695 asmlinkage long compat_sys_setitimer(int which, 696 struct old_itimerval32 __user *in, 697 struct old_itimerval32 __user *out); 698 699 /* kernel/kexec.c */ 700 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 701 compat_ulong_t nr_segments, 702 struct compat_kexec_segment __user *, 703 compat_ulong_t flags); 704 705 /* kernel/posix-timers.c */ 706 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 707 struct compat_sigevent __user *timer_event_spec, 708 timer_t __user *created_timer_id); 709 710 /* kernel/ptrace.c */ 711 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 712 compat_long_t addr, compat_long_t data); 713 714 /* kernel/sched/core.c */ 715 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 716 unsigned int len, 717 compat_ulong_t __user *user_mask_ptr); 718 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 719 unsigned int len, 720 compat_ulong_t __user *user_mask_ptr); 721 722 /* kernel/signal.c */ 723 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 724 compat_stack_t __user *uoss_ptr); 725 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 726 compat_size_t sigsetsize); 727 #ifndef CONFIG_ODD_RT_SIGACTION 728 asmlinkage long compat_sys_rt_sigaction(int, 729 const struct compat_sigaction __user *, 730 struct compat_sigaction __user *, 731 compat_size_t); 732 #endif 733 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 734 compat_sigset_t __user *oset, 735 compat_size_t sigsetsize); 736 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 737 compat_size_t sigsetsize); 738 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 739 struct compat_siginfo __user *uinfo, 740 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 741 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 742 struct compat_siginfo __user *uinfo, 743 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 744 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 745 struct compat_siginfo __user *uinfo); 746 /* No generic prototype for rt_sigreturn */ 747 748 /* kernel/sys.c */ 749 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 750 asmlinkage long compat_sys_getrlimit(unsigned int resource, 751 struct compat_rlimit __user *rlim); 752 asmlinkage long compat_sys_setrlimit(unsigned int resource, 753 struct compat_rlimit __user *rlim); 754 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 755 756 /* kernel/time.c */ 757 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 758 struct timezone __user *tz); 759 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 760 struct timezone __user *tz); 761 762 /* kernel/timer.c */ 763 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 764 765 /* ipc/mqueue.c */ 766 asmlinkage long compat_sys_mq_open(const char __user *u_name, 767 int oflag, compat_mode_t mode, 768 struct compat_mq_attr __user *u_attr); 769 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 770 const struct compat_sigevent __user *u_notification); 771 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 772 const struct compat_mq_attr __user *u_mqstat, 773 struct compat_mq_attr __user *u_omqstat); 774 775 /* ipc/msg.c */ 776 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 777 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 778 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 779 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 780 compat_ssize_t msgsz, int msgflg); 781 782 /* ipc/sem.c */ 783 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 784 785 /* ipc/shm.c */ 786 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 787 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 788 789 /* net/socket.c */ 790 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 791 unsigned flags, struct sockaddr __user *addr, 792 int __user *addrlen); 793 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 794 unsigned flags); 795 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 796 unsigned int flags); 797 798 /* mm/filemap.c: No generic prototype for readahead */ 799 800 /* security/keys/keyctl.c */ 801 asmlinkage long compat_sys_keyctl(u32 option, 802 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 803 804 /* arch/example/kernel/sys_example.c */ 805 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 806 const compat_uptr_t __user *envp); 807 808 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 809 810 /* mm/, CONFIG_MMU only */ 811 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 812 compat_ulong_t mode, 813 compat_ulong_t __user *nmask, 814 compat_ulong_t maxnode, compat_ulong_t flags); 815 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 816 compat_ulong_t __user *nmask, 817 compat_ulong_t maxnode, 818 compat_ulong_t addr, 819 compat_ulong_t flags); 820 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 821 compat_ulong_t maxnode); 822 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 823 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 824 const compat_ulong_t __user *new_nodes); 825 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 826 __u32 __user *pages, 827 const int __user *nodes, 828 int __user *status, 829 int flags); 830 831 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 832 compat_pid_t pid, int sig, 833 struct compat_siginfo __user *uinfo); 834 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 835 unsigned vlen, unsigned int flags, 836 struct __kernel_timespec __user *timeout); 837 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 838 unsigned vlen, unsigned int flags, 839 struct old_timespec32 __user *timeout); 840 asmlinkage long compat_sys_wait4(compat_pid_t pid, 841 compat_uint_t __user *stat_addr, int options, 842 struct compat_rusage __user *ru); 843 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 844 int, const char __user *); 845 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 846 struct file_handle __user *handle, 847 int flags); 848 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 849 unsigned vlen, unsigned int flags); 850 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 851 const compat_uptr_t __user *argv, 852 const compat_uptr_t __user *envp, int flags); 853 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 854 const struct iovec __user *vec, 855 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 856 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 857 const struct iovec __user *vec, 858 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 859 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 860 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 861 const struct iovec __user *vec, 862 unsigned long vlen, loff_t pos, rwf_t flags); 863 #endif 864 865 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 866 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 867 const struct iovec __user *vec, 868 unsigned long vlen, loff_t pos, rwf_t flags); 869 #endif 870 871 872 /* 873 * Deprecated system calls which are still defined in 874 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 875 */ 876 877 /* __ARCH_WANT_SYSCALL_NO_AT */ 878 asmlinkage long compat_sys_open(const char __user *filename, int flags, 879 umode_t mode); 880 881 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 882 asmlinkage long compat_sys_signalfd(int ufd, 883 const compat_sigset_t __user *sigmask, 884 compat_size_t sigsetsize); 885 886 /* __ARCH_WANT_SYSCALL_OFF_T */ 887 asmlinkage long compat_sys_newstat(const char __user *filename, 888 struct compat_stat __user *statbuf); 889 asmlinkage long compat_sys_newlstat(const char __user *filename, 890 struct compat_stat __user *statbuf); 891 892 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 893 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 894 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 895 struct old_timeval32 __user *tvp); 896 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 897 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 898 unsigned flags); 899 900 /* obsolete: fs/readdir.c */ 901 asmlinkage long compat_sys_old_readdir(unsigned int fd, 902 struct compat_old_linux_dirent __user *, 903 unsigned int count); 904 905 /* obsolete: fs/select.c */ 906 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 907 908 /* obsolete: ipc */ 909 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 910 911 /* obsolete: kernel/signal.c */ 912 #ifdef __ARCH_WANT_SYS_SIGPENDING 913 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 914 #endif 915 916 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 917 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 918 compat_old_sigset_t __user *oset); 919 #endif 920 #ifdef CONFIG_COMPAT_OLD_SIGACTION 921 asmlinkage long compat_sys_sigaction(int sig, 922 const struct compat_old_sigaction __user *act, 923 struct compat_old_sigaction __user *oact); 924 #endif 925 926 /* obsolete: net/socket.c */ 927 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 928 929 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 930 931 932 /* 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 */ 937 938 #ifndef in_compat_syscall 939 static inline bool in_compat_syscall(void) { return is_compat_task(); } 940 #endif 941 942 /** 943 * ns_to_old_timeval32 - Compat version of ns_to_timeval 944 * @nsec: the nanoseconds value to be converted 945 * 946 * Returns the old_timeval32 representation of the nsec parameter. 947 */ 948 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 949 { 950 struct __kernel_old_timeval tv; 951 struct old_timeval32 ctv; 952 953 tv = ns_to_kernel_old_timeval(nsec); 954 ctv.tv_sec = tv.tv_sec; 955 ctv.tv_usec = tv.tv_usec; 956 957 return ctv; 958 } 959 960 /* 961 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 962 * directly. Instead, use one of the functions which work equivalently, such 963 * as the kcompat_sys_xyzyyz() functions prototyped below. 964 */ 965 966 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 967 struct compat_statfs64 __user * buf); 968 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 969 struct compat_statfs64 __user * buf); 970 971 #else /* !CONFIG_COMPAT */ 972 973 #define is_compat_task() (0) 974 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 975 #define in_compat_syscall in_compat_syscall 976 static inline bool in_compat_syscall(void) { return false; } 977 978 #endif /* CONFIG_COMPAT */ 979 980 /* 981 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 982 * types, and will need special compat treatment for that. Most architectures 983 * don't need that special handling even for compat syscalls. 984 */ 985 #ifndef compat_need_64bit_alignment_fixup 986 #define compat_need_64bit_alignment_fixup() false 987 #endif 988 989 /* 990 * A pointer passed in from user mode. This should not 991 * be used for syscall parameters, just declare them 992 * as pointers because the syscall entry code will have 993 * appropriately converted them already. 994 */ 995 #ifndef compat_ptr 996 static inline void __user *compat_ptr(compat_uptr_t uptr) 997 { 998 return (void __user *)(unsigned long)uptr; 999 } 1000 #endif 1001 1002 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 1003 { 1004 return (u32)(unsigned long)uptr; 1005 } 1006 1007 #endif /* _LINUX_COMPAT_H */ 1008