1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_COMPAT_H
3 #define _LINUX_COMPAT_H
4 /*
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
7 */
8
9 #include <linux/types.h>
10 #include <linux/time.h>
11
12 #include <linux/stat.h>
13 #include <linux/param.h> /* for HZ */
14 #include <linux/sem.h>
15 #include <linux/socket.h>
16 #include <linux/if.h>
17 #include <linux/fs.h>
18 #include <linux/aio_abi.h> /* for aio_context_t */
19 #include <linux/uaccess.h>
20 #include <linux/unistd.h>
21
22 #include <asm/compat.h>
23
24 #ifdef CONFIG_COMPAT
25 #include <asm/siginfo.h>
26 #include <asm/signal.h>
27 #endif
28
29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
30 /*
31 * It may be useful for an architecture to override the definitions of the
32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
33 * to use a different calling convention for syscalls. To allow for that,
34 + the prototypes for the compat_sys_*() functions below will *not* be included
35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
36 */
37 #include <asm/syscall_wrapper.h>
38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
39
40 #ifndef COMPAT_USE_64BIT_TIME
41 #define COMPAT_USE_64BIT_TIME 0
42 #endif
43
44 #ifndef __SC_DELOUSE
45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
46 #endif
47
48 #ifndef COMPAT_SYSCALL_DEFINE0
49 #define COMPAT_SYSCALL_DEFINE0(name) \
50 asmlinkage long compat_sys_##name(void); \
51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
52 asmlinkage long compat_sys_##name(void)
53 #endif /* COMPAT_SYSCALL_DEFINE0 */
54
55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
67
68 /*
69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
70 * sign-extends 32-bit ints to longs whenever needed. The actual work is
71 * done within __do_compat_sys_*().
72 */
73 #ifndef COMPAT_SYSCALL_DEFINEx
74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
75 __diag_push(); \
76 __diag_ignore(GCC, 8, "-Wattribute-alias", \
77 "Type aliasing is used to sanitize syscall arguments");\
78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
85 { \
86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
87 __MAP(x,__SC_TEST,__VA_ARGS__); \
88 return ret; \
89 } \
90 __diag_pop(); \
91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
92 #endif /* COMPAT_SYSCALL_DEFINEx */
93
94 #ifdef CONFIG_COMPAT
95
96 #ifndef compat_user_stack_pointer
97 #define compat_user_stack_pointer() current_user_stack_pointer()
98 #endif
99 #ifndef compat_sigaltstack /* we'll need that for MIPS */
100 typedef struct compat_sigaltstack {
101 compat_uptr_t ss_sp;
102 int ss_flags;
103 compat_size_t ss_size;
104 } compat_stack_t;
105 #endif
106 #ifndef COMPAT_MINSIGSTKSZ
107 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
108 #endif
109
110 #define compat_jiffies_to_clock_t(x) \
111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
112
113 typedef __compat_uid32_t compat_uid_t;
114 typedef __compat_gid32_t compat_gid_t;
115
116 struct compat_sel_arg_struct;
117 struct rusage;
118
119 struct compat_itimerval {
120 struct old_timeval32 it_interval;
121 struct old_timeval32 it_value;
122 };
123
124 struct itimerval;
125 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
126 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
127
128 struct compat_tms {
129 compat_clock_t tms_utime;
130 compat_clock_t tms_stime;
131 compat_clock_t tms_cutime;
132 compat_clock_t tms_cstime;
133 };
134
135 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
136
137 typedef struct {
138 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
139 } compat_sigset_t;
140
141 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
142 size_t sigsetsize);
143
144 struct compat_sigaction {
145 #ifndef __ARCH_HAS_IRIX_SIGACTION
146 compat_uptr_t sa_handler;
147 compat_ulong_t sa_flags;
148 #else
149 compat_uint_t sa_flags;
150 compat_uptr_t sa_handler;
151 #endif
152 #ifdef __ARCH_HAS_SA_RESTORER
153 compat_uptr_t sa_restorer;
154 #endif
155 compat_sigset_t sa_mask __packed;
156 };
157
158 typedef union compat_sigval {
159 compat_int_t sival_int;
160 compat_uptr_t sival_ptr;
161 } compat_sigval_t;
162
163 typedef struct compat_siginfo {
164 int si_signo;
165 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
166 int si_errno;
167 int si_code;
168 #else
169 int si_code;
170 int si_errno;
171 #endif
172
173 union {
174 int _pad[128/sizeof(int) - 3];
175
176 /* kill() */
177 struct {
178 compat_pid_t _pid; /* sender's pid */
179 __compat_uid32_t _uid; /* sender's uid */
180 } _kill;
181
182 /* POSIX.1b timers */
183 struct {
184 compat_timer_t _tid; /* timer id */
185 int _overrun; /* overrun count */
186 compat_sigval_t _sigval; /* same as below */
187 } _timer;
188
189 /* POSIX.1b signals */
190 struct {
191 compat_pid_t _pid; /* sender's pid */
192 __compat_uid32_t _uid; /* sender's uid */
193 compat_sigval_t _sigval;
194 } _rt;
195
196 /* SIGCHLD */
197 struct {
198 compat_pid_t _pid; /* which child */
199 __compat_uid32_t _uid; /* sender's uid */
200 int _status; /* exit code */
201 compat_clock_t _utime;
202 compat_clock_t _stime;
203 } _sigchld;
204
205 #ifdef CONFIG_X86_X32_ABI
206 /* SIGCHLD (x32 version) */
207 struct {
208 compat_pid_t _pid; /* which child */
209 __compat_uid32_t _uid; /* sender's uid */
210 int _status; /* exit code */
211 compat_s64 _utime;
212 compat_s64 _stime;
213 } _sigchld_x32;
214 #endif
215
216 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
217 struct {
218 compat_uptr_t _addr; /* faulting insn/memory ref. */
219 #ifdef __ARCH_SI_TRAPNO
220 int _trapno; /* TRAP # which caused the signal */
221 #endif
222 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
223 sizeof(short) : __alignof__(compat_uptr_t))
224 union {
225 /*
226 * used when si_code=BUS_MCEERR_AR or
227 * used when si_code=BUS_MCEERR_AO
228 */
229 short int _addr_lsb; /* Valid LSB of the reported address. */
230 /* used when si_code=SEGV_BNDERR */
231 struct {
232 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
233 compat_uptr_t _lower;
234 compat_uptr_t _upper;
235 } _addr_bnd;
236 /* used when si_code=SEGV_PKUERR */
237 struct {
238 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
239 u32 _pkey;
240 } _addr_pkey;
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 /*
259 * These functions operate on 32- or 64-bit specs depending on
260 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
261 */
262 extern int compat_get_timespec(struct timespec *, const void __user *);
263 extern int compat_put_timespec(const struct timespec *, void __user *);
264 extern int compat_get_timeval(struct timeval *, const void __user *);
265 extern int compat_put_timeval(const struct timeval *, void __user *);
266
267 struct compat_iovec {
268 compat_uptr_t iov_base;
269 compat_size_t iov_len;
270 };
271
272 struct compat_rlimit {
273 compat_ulong_t rlim_cur;
274 compat_ulong_t rlim_max;
275 };
276
277 struct compat_rusage {
278 struct old_timeval32 ru_utime;
279 struct old_timeval32 ru_stime;
280 compat_long_t ru_maxrss;
281 compat_long_t ru_ixrss;
282 compat_long_t ru_idrss;
283 compat_long_t ru_isrss;
284 compat_long_t ru_minflt;
285 compat_long_t ru_majflt;
286 compat_long_t ru_nswap;
287 compat_long_t ru_inblock;
288 compat_long_t ru_oublock;
289 compat_long_t ru_msgsnd;
290 compat_long_t ru_msgrcv;
291 compat_long_t ru_nsignals;
292 compat_long_t ru_nvcsw;
293 compat_long_t ru_nivcsw;
294 };
295
296 extern int put_compat_rusage(const struct rusage *,
297 struct compat_rusage __user *);
298
299 struct compat_siginfo;
300 struct __compat_aio_sigset;
301
302 struct compat_dirent {
303 u32 d_ino;
304 compat_off_t d_off;
305 u16 d_reclen;
306 char d_name[256];
307 };
308
309 struct compat_ustat {
310 compat_daddr_t f_tfree;
311 compat_ino_t f_tinode;
312 char f_fname[6];
313 char f_fpack[6];
314 };
315
316 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
317
318 typedef struct compat_sigevent {
319 compat_sigval_t sigev_value;
320 compat_int_t sigev_signo;
321 compat_int_t sigev_notify;
322 union {
323 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
324 compat_int_t _tid;
325
326 struct {
327 compat_uptr_t _function;
328 compat_uptr_t _attribute;
329 } _sigev_thread;
330 } _sigev_un;
331 } compat_sigevent_t;
332
333 struct compat_ifmap {
334 compat_ulong_t mem_start;
335 compat_ulong_t mem_end;
336 unsigned short base_addr;
337 unsigned char irq;
338 unsigned char dma;
339 unsigned char port;
340 };
341
342 struct compat_if_settings {
343 unsigned int type; /* Type of physical device or protocol */
344 unsigned int size; /* Size of the data allocated by the caller */
345 compat_uptr_t ifs_ifsu; /* union of pointers */
346 };
347
348 struct compat_ifreq {
349 union {
350 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
351 } ifr_ifrn;
352 union {
353 struct sockaddr ifru_addr;
354 struct sockaddr ifru_dstaddr;
355 struct sockaddr ifru_broadaddr;
356 struct sockaddr ifru_netmask;
357 struct sockaddr ifru_hwaddr;
358 short ifru_flags;
359 compat_int_t ifru_ivalue;
360 compat_int_t ifru_mtu;
361 struct compat_ifmap ifru_map;
362 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
363 char ifru_newname[IFNAMSIZ];
364 compat_caddr_t ifru_data;
365 struct compat_if_settings ifru_settings;
366 } ifr_ifru;
367 };
368
369 struct compat_ifconf {
370 compat_int_t ifc_len; /* size of buffer */
371 compat_caddr_t ifcbuf;
372 };
373
374 struct compat_robust_list {
375 compat_uptr_t next;
376 };
377
378 struct compat_robust_list_head {
379 struct compat_robust_list list;
380 compat_long_t futex_offset;
381 compat_uptr_t list_op_pending;
382 };
383
384 #ifdef CONFIG_COMPAT_OLD_SIGACTION
385 struct compat_old_sigaction {
386 compat_uptr_t sa_handler;
387 compat_old_sigset_t sa_mask;
388 compat_ulong_t sa_flags;
389 compat_uptr_t sa_restorer;
390 };
391 #endif
392
393 struct compat_keyctl_kdf_params {
394 compat_uptr_t hashname;
395 compat_uptr_t otherinfo;
396 __u32 otherinfolen;
397 __u32 __spare[8];
398 };
399
400 struct compat_statfs;
401 struct compat_statfs64;
402 struct compat_old_linux_dirent;
403 struct compat_linux_dirent;
404 struct linux_dirent64;
405 struct compat_msghdr;
406 struct compat_mmsghdr;
407 struct compat_sysinfo;
408 struct compat_sysctl_args;
409 struct compat_kexec_segment;
410 struct compat_mq_attr;
411 struct compat_msgbuf;
412
413 extern void compat_exit_robust_list(struct task_struct *curr);
414
415 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
416
417 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
418
419 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
420 unsigned long bitmap_size);
421 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
422 unsigned long bitmap_size);
423 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
424 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
425 int get_compat_sigevent(struct sigevent *event,
426 const struct compat_sigevent __user *u_event);
427
old_timeval32_compare(struct old_timeval32 * lhs,struct old_timeval32 * rhs)428 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
429 struct old_timeval32 *rhs)
430 {
431 if (lhs->tv_sec < rhs->tv_sec)
432 return -1;
433 if (lhs->tv_sec > rhs->tv_sec)
434 return 1;
435 return lhs->tv_usec - rhs->tv_usec;
436 }
437
old_timespec32_compare(struct old_timespec32 * lhs,struct old_timespec32 * rhs)438 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
439 struct old_timespec32 *rhs)
440 {
441 if (lhs->tv_sec < rhs->tv_sec)
442 return -1;
443 if (lhs->tv_sec > rhs->tv_sec)
444 return 1;
445 return lhs->tv_nsec - rhs->tv_nsec;
446 }
447
448 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
449
450 /*
451 * Defined inline such that size can be compile time constant, which avoids
452 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
453 */
454 static inline int
put_compat_sigset(compat_sigset_t __user * compat,const sigset_t * set,unsigned int size)455 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
456 unsigned int size)
457 {
458 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
459 #ifdef __BIG_ENDIAN
460 compat_sigset_t v;
461 switch (_NSIG_WORDS) {
462 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
463 /* fall through */
464 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
465 /* fall through */
466 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
467 /* fall through */
468 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
469 }
470 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
471 #else
472 return copy_to_user(compat, set, size) ? -EFAULT : 0;
473 #endif
474 }
475
476 extern int compat_ptrace_request(struct task_struct *child,
477 compat_long_t request,
478 compat_ulong_t addr, compat_ulong_t data);
479
480 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
481 compat_ulong_t addr, compat_ulong_t data);
482
483 struct epoll_event; /* fortunately, this one is fixed-layout */
484
485 extern ssize_t compat_rw_copy_check_uvector(int type,
486 const struct compat_iovec __user *uvector,
487 unsigned long nr_segs,
488 unsigned long fast_segs, struct iovec *fast_pointer,
489 struct iovec **ret_pointer);
490
491 extern void __user *compat_alloc_user_space(unsigned long len);
492
493 int compat_restore_altstack(const compat_stack_t __user *uss);
494 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
495 #define compat_save_altstack_ex(uss, sp) do { \
496 compat_stack_t __user *__uss = uss; \
497 struct task_struct *t = current; \
498 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
499 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
500 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
501 if (t->sas_ss_flags & SS_AUTODISARM) \
502 sas_ss_reset(t); \
503 } while (0);
504
505 /*
506 * These syscall function prototypes are kept in the same order as
507 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
508 * go below.
509 *
510 * Please note that these prototypes here are only provided for information
511 * purposes, for static analysis, and for linking from the syscall table.
512 * These functions should not be called elsewhere from kernel code.
513 *
514 * As the syscall calling convention may be different from the default
515 * for architectures overriding the syscall calling convention, do not
516 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
517 */
518 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
519 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
520 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
521 u32 __user *iocb);
522 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
523 compat_long_t min_nr,
524 compat_long_t nr,
525 struct io_event __user *events,
526 struct old_timespec32 __user *timeout,
527 const struct __compat_aio_sigset __user *usig);
528 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
529 compat_long_t min_nr,
530 compat_long_t nr,
531 struct io_event __user *events,
532 struct __kernel_timespec __user *timeout,
533 const struct __compat_aio_sigset __user *usig);
534
535 /* fs/cookies.c */
536 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
537
538 /* fs/eventpoll.c */
539 asmlinkage long compat_sys_epoll_pwait(int epfd,
540 struct epoll_event __user *events,
541 int maxevents, int timeout,
542 const compat_sigset_t __user *sigmask,
543 compat_size_t sigsetsize);
544
545 /* fs/fcntl.c */
546 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
547 compat_ulong_t arg);
548 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
549 compat_ulong_t arg);
550
551 /* fs/ioctl.c */
552 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
553 compat_ulong_t arg);
554
555 /* fs/namespace.c */
556 asmlinkage long compat_sys_mount(const char __user *dev_name,
557 const char __user *dir_name,
558 const char __user *type, compat_ulong_t flags,
559 const void __user *data);
560
561 /* fs/open.c */
562 asmlinkage long compat_sys_statfs(const char __user *pathname,
563 struct compat_statfs __user *buf);
564 asmlinkage long compat_sys_statfs64(const char __user *pathname,
565 compat_size_t sz,
566 struct compat_statfs64 __user *buf);
567 asmlinkage long compat_sys_fstatfs(unsigned int fd,
568 struct compat_statfs __user *buf);
569 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
570 struct compat_statfs64 __user *buf);
571 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
572 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
573 /* No generic prototype for truncate64, ftruncate64, fallocate */
574 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
575 int flags, umode_t mode);
576
577 /* fs/readdir.c */
578 asmlinkage long compat_sys_getdents(unsigned int fd,
579 struct compat_linux_dirent __user *dirent,
580 unsigned int count);
581
582 /* fs/read_write.c */
583 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
584 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
585 const struct compat_iovec __user *vec, compat_ulong_t vlen);
586 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
587 const struct compat_iovec __user *vec, compat_ulong_t vlen);
588 /* No generic prototype for pread64 and pwrite64 */
589 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
590 const struct compat_iovec __user *vec,
591 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
592 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
593 const struct compat_iovec __user *vec,
594 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
595 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
596 asmlinkage long compat_sys_preadv64(unsigned long fd,
597 const struct compat_iovec __user *vec,
598 unsigned long vlen, loff_t pos);
599 #endif
600
601 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
602 asmlinkage long compat_sys_pwritev64(unsigned long fd,
603 const struct compat_iovec __user *vec,
604 unsigned long vlen, loff_t pos);
605 #endif
606
607 /* fs/sendfile.c */
608 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
609 compat_off_t __user *offset, compat_size_t count);
610 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
611 compat_loff_t __user *offset, compat_size_t count);
612
613 /* fs/select.c */
614 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
615 compat_ulong_t __user *outp,
616 compat_ulong_t __user *exp,
617 struct old_timespec32 __user *tsp,
618 void __user *sig);
619 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
620 compat_ulong_t __user *outp,
621 compat_ulong_t __user *exp,
622 struct __kernel_timespec __user *tsp,
623 void __user *sig);
624 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
625 unsigned int nfds,
626 struct old_timespec32 __user *tsp,
627 const compat_sigset_t __user *sigmask,
628 compat_size_t sigsetsize);
629 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
630 unsigned int nfds,
631 struct __kernel_timespec __user *tsp,
632 const compat_sigset_t __user *sigmask,
633 compat_size_t sigsetsize);
634
635 /* fs/signalfd.c */
636 asmlinkage long compat_sys_signalfd4(int ufd,
637 const compat_sigset_t __user *sigmask,
638 compat_size_t sigsetsize, int flags);
639
640 /* fs/splice.c */
641 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
642 unsigned int nr_segs, unsigned int flags);
643
644 /* fs/stat.c */
645 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
646 const char __user *filename,
647 struct compat_stat __user *statbuf,
648 int flag);
649 asmlinkage long compat_sys_newfstat(unsigned int fd,
650 struct compat_stat __user *statbuf);
651
652 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
653
654 /* kernel/exit.c */
655 asmlinkage long compat_sys_waitid(int, compat_pid_t,
656 struct compat_siginfo __user *, int,
657 struct compat_rusage __user *);
658
659
660
661 /* kernel/futex.c */
662 asmlinkage long
663 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
664 compat_size_t len);
665 asmlinkage long
666 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
667 compat_size_t __user *len_ptr);
668
669 /* kernel/itimer.c */
670 asmlinkage long compat_sys_getitimer(int which,
671 struct compat_itimerval __user *it);
672 asmlinkage long compat_sys_setitimer(int which,
673 struct compat_itimerval __user *in,
674 struct compat_itimerval __user *out);
675
676 /* kernel/kexec.c */
677 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
678 compat_ulong_t nr_segments,
679 struct compat_kexec_segment __user *,
680 compat_ulong_t flags);
681
682 /* kernel/posix-timers.c */
683 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
684 struct compat_sigevent __user *timer_event_spec,
685 timer_t __user *created_timer_id);
686
687 /* kernel/ptrace.c */
688 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
689 compat_long_t addr, compat_long_t data);
690
691 /* kernel/sched/core.c */
692 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
693 unsigned int len,
694 compat_ulong_t __user *user_mask_ptr);
695 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
696 unsigned int len,
697 compat_ulong_t __user *user_mask_ptr);
698
699 /* kernel/signal.c */
700 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
701 compat_stack_t __user *uoss_ptr);
702 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
703 compat_size_t sigsetsize);
704 #ifndef CONFIG_ODD_RT_SIGACTION
705 asmlinkage long compat_sys_rt_sigaction(int,
706 const struct compat_sigaction __user *,
707 struct compat_sigaction __user *,
708 compat_size_t);
709 #endif
710 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
711 compat_sigset_t __user *oset,
712 compat_size_t sigsetsize);
713 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
714 compat_size_t sigsetsize);
715 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
716 struct compat_siginfo __user *uinfo,
717 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
718 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
719 struct compat_siginfo __user *uinfo,
720 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
721 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
722 struct compat_siginfo __user *uinfo);
723 /* No generic prototype for rt_sigreturn */
724
725 /* kernel/sys.c */
726 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
727 asmlinkage long compat_sys_getrlimit(unsigned int resource,
728 struct compat_rlimit __user *rlim);
729 asmlinkage long compat_sys_setrlimit(unsigned int resource,
730 struct compat_rlimit __user *rlim);
731 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
732
733 /* kernel/time.c */
734 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
735 struct timezone __user *tz);
736 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
737 struct timezone __user *tz);
738
739 /* kernel/timer.c */
740 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
741
742 /* ipc/mqueue.c */
743 asmlinkage long compat_sys_mq_open(const char __user *u_name,
744 int oflag, compat_mode_t mode,
745 struct compat_mq_attr __user *u_attr);
746 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
747 const struct compat_sigevent __user *u_notification);
748 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
749 const struct compat_mq_attr __user *u_mqstat,
750 struct compat_mq_attr __user *u_omqstat);
751
752 /* ipc/msg.c */
753 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
754 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
755 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
756 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
757 compat_ssize_t msgsz, int msgflg);
758
759 /* ipc/sem.c */
760 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
761
762 /* ipc/shm.c */
763 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
764 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
765
766 /* net/socket.c */
767 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
768 unsigned flags, struct sockaddr __user *addr,
769 int __user *addrlen);
770 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
771 char __user *optval, unsigned int optlen);
772 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
773 char __user *optval, int __user *optlen);
774 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
775 unsigned flags);
776 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
777 unsigned int flags);
778
779 /* mm/filemap.c: No generic prototype for readahead */
780
781 /* security/keys/keyctl.c */
782 asmlinkage long compat_sys_keyctl(u32 option,
783 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
784
785 /* arch/example/kernel/sys_example.c */
786 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
787 const compat_uptr_t __user *envp);
788
789 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
790
791 /* mm/, CONFIG_MMU only */
792 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
793 compat_ulong_t mode,
794 compat_ulong_t __user *nmask,
795 compat_ulong_t maxnode, compat_ulong_t flags);
796 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
797 compat_ulong_t __user *nmask,
798 compat_ulong_t maxnode,
799 compat_ulong_t addr,
800 compat_ulong_t flags);
801 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
802 compat_ulong_t maxnode);
803 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
804 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
805 const compat_ulong_t __user *new_nodes);
806 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
807 __u32 __user *pages,
808 const int __user *nodes,
809 int __user *status,
810 int flags);
811
812 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
813 compat_pid_t pid, int sig,
814 struct compat_siginfo __user *uinfo);
815 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
816 unsigned vlen, unsigned int flags,
817 struct __kernel_timespec __user *timeout);
818 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
819 unsigned vlen, unsigned int flags,
820 struct old_timespec32 __user *timeout);
821 asmlinkage long compat_sys_wait4(compat_pid_t pid,
822 compat_uint_t __user *stat_addr, int options,
823 struct compat_rusage __user *ru);
824 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
825 int, const char __user *);
826 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
827 struct file_handle __user *handle,
828 int flags);
829 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
830 unsigned vlen, unsigned int flags);
831 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
832 const struct compat_iovec __user *lvec,
833 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
834 compat_ulong_t riovcnt, compat_ulong_t flags);
835 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
836 const struct compat_iovec __user *lvec,
837 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
838 compat_ulong_t riovcnt, compat_ulong_t flags);
839 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
840 const compat_uptr_t __user *argv,
841 const compat_uptr_t __user *envp, int flags);
842 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
843 const struct compat_iovec __user *vec,
844 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
845 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
846 const struct compat_iovec __user *vec,
847 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
848 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
849 asmlinkage long compat_sys_readv64v2(unsigned long fd,
850 const struct compat_iovec __user *vec,
851 unsigned long vlen, loff_t pos, rwf_t flags);
852 #endif
853
854 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
855 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
856 const struct compat_iovec __user *vec,
857 unsigned long vlen, loff_t pos, rwf_t flags);
858 #endif
859
860
861 /*
862 * Deprecated system calls which are still defined in
863 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
864 */
865
866 /* __ARCH_WANT_SYSCALL_NO_AT */
867 asmlinkage long compat_sys_open(const char __user *filename, int flags,
868 umode_t mode);
869
870 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
871 asmlinkage long compat_sys_signalfd(int ufd,
872 const compat_sigset_t __user *sigmask,
873 compat_size_t sigsetsize);
874
875 /* __ARCH_WANT_SYSCALL_OFF_T */
876 asmlinkage long compat_sys_newstat(const char __user *filename,
877 struct compat_stat __user *statbuf);
878 asmlinkage long compat_sys_newlstat(const char __user *filename,
879 struct compat_stat __user *statbuf);
880
881 /* __ARCH_WANT_SYSCALL_DEPRECATED */
882 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
883 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
884 struct old_timeval32 __user *tvp);
885 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
886 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
887 unsigned flags);
888 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
889
890 /* obsolete: fs/readdir.c */
891 asmlinkage long compat_sys_old_readdir(unsigned int fd,
892 struct compat_old_linux_dirent __user *,
893 unsigned int count);
894
895 /* obsolete: fs/select.c */
896 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
897
898 /* obsolete: ipc */
899 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
900
901 /* obsolete: kernel/signal.c */
902 #ifdef __ARCH_WANT_SYS_SIGPENDING
903 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
904 #endif
905
906 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
907 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
908 compat_old_sigset_t __user *oset);
909 #endif
910 #ifdef CONFIG_COMPAT_OLD_SIGACTION
911 asmlinkage long compat_sys_sigaction(int sig,
912 const struct compat_old_sigaction __user *act,
913 struct compat_old_sigaction __user *oact);
914 #endif
915
916 /* obsolete: net/socket.c */
917 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
918
919 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
920
921
922 /*
923 * For most but not all architectures, "am I in a compat syscall?" and
924 * "am I a compat task?" are the same question. For architectures on which
925 * they aren't the same question, arch code can override in_compat_syscall.
926 */
927
928 #ifndef in_compat_syscall
in_compat_syscall(void)929 static inline bool in_compat_syscall(void) { return is_compat_task(); }
930 #endif
931
932 /**
933 * ns_to_old_timeval32 - Compat version of ns_to_timeval
934 * @nsec: the nanoseconds value to be converted
935 *
936 * Returns the old_timeval32 representation of the nsec parameter.
937 */
ns_to_old_timeval32(s64 nsec)938 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
939 {
940 struct timeval tv;
941 struct old_timeval32 ctv;
942
943 tv = ns_to_timeval(nsec);
944 ctv.tv_sec = tv.tv_sec;
945 ctv.tv_usec = tv.tv_usec;
946
947 return ctv;
948 }
949
950 /*
951 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
952 * directly. Instead, use one of the functions which work equivalently, such
953 * as the kcompat_sys_xyzyyz() functions prototyped below.
954 */
955
956 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
957 struct compat_statfs64 __user * buf);
958 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
959 struct compat_statfs64 __user * buf);
960
961 #else /* !CONFIG_COMPAT */
962
963 #define is_compat_task() (0)
964 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
965 #define in_compat_syscall in_compat_syscall
in_compat_syscall(void)966 static inline bool in_compat_syscall(void) { return false; }
967
968 #endif /* CONFIG_COMPAT */
969
970 #endif /* _LINUX_COMPAT_H */
971
