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 */
100typedef 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
113typedef __compat_uid32_t compat_uid_t;
114typedef __compat_gid32_t compat_gid_t;
115
116struct compat_sel_arg_struct;
117struct rusage;
118
119struct compat_itimerval {
120 struct old_timeval32 it_interval;
121 struct old_timeval32 it_value;
122};
123
124struct itimerval;
125int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
126int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
127
128struct 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
137typedef struct {
138 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
139} compat_sigset_t;
140
141int set_compat_user_sigmask(const compat_sigset_t __user *usigmask,
142 sigset_t *set, sigset_t *oldset,
143 size_t sigsetsize);
144
145struct compat_sigaction {
146#ifndef __ARCH_HAS_IRIX_SIGACTION
147 compat_uptr_t sa_handler;
148 compat_ulong_t sa_flags;
149#else
150 compat_uint_t sa_flags;
151 compat_uptr_t sa_handler;
152#endif
153#ifdef __ARCH_HAS_SA_RESTORER
154 compat_uptr_t sa_restorer;
155#endif
156 compat_sigset_t sa_mask __packed;
157};
158
159typedef union compat_sigval {
160 compat_int_t sival_int;
161 compat_uptr_t sival_ptr;
162} compat_sigval_t;
163
164typedef struct compat_siginfo {
165 int si_signo;
166#ifndef __ARCH_HAS_SWAPPED_SIGINFO
167 int si_errno;
168 int si_code;
169#else
170 int si_code;
171 int si_errno;
172#endif
173
174 union {
175 int _pad[128/sizeof(int) - 3];
176
177 /* kill() */
178 struct {
179 compat_pid_t _pid; /* sender's pid */
180 __compat_uid32_t _uid; /* sender's uid */
181 } _kill;
182
183 /* POSIX.1b timers */
184 struct {
185 compat_timer_t _tid; /* timer id */
186 int _overrun; /* overrun count */
187 compat_sigval_t _sigval; /* same as below */
188 } _timer;
189
190 /* POSIX.1b signals */
191 struct {
192 compat_pid_t _pid; /* sender's pid */
193 __compat_uid32_t _uid; /* sender's uid */
194 compat_sigval_t _sigval;
195 } _rt;
196
197 /* SIGCHLD */
198 struct {
199 compat_pid_t _pid; /* which child */
200 __compat_uid32_t _uid; /* sender's uid */
201 int _status; /* exit code */
202 compat_clock_t _utime;
203 compat_clock_t _stime;
204 } _sigchld;
205
206#ifdef CONFIG_X86_X32_ABI
207 /* SIGCHLD (x32 version) */
208 struct {
209 compat_pid_t _pid; /* which child */
210 __compat_uid32_t _uid; /* sender's uid */
211 int _status; /* exit code */
212 compat_s64 _utime;
213 compat_s64 _stime;
214 } _sigchld_x32;
215#endif
216
217 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
218 struct {
219 compat_uptr_t _addr; /* faulting insn/memory ref. */
220#ifdef __ARCH_SI_TRAPNO
221 int _trapno; /* TRAP # which caused the signal */
222#endif
223#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
224 sizeof(short) : __alignof__(compat_uptr_t))
225 union {
226 /*
227 * used when si_code=BUS_MCEERR_AR or
228 * used when si_code=BUS_MCEERR_AO
229 */
230 short int _addr_lsb; /* Valid LSB of the reported address. */
231 /* used when si_code=SEGV_BNDERR */
232 struct {
233 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
234 compat_uptr_t _lower;
235 compat_uptr_t _upper;
236 } _addr_bnd;
237 /* used when si_code=SEGV_PKUERR */
238 struct {
239 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
240 u32 _pkey;
241 } _addr_pkey;
242 };
243 } _sigfault;
244
245 /* SIGPOLL */
246 struct {
247 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
248 int _fd;
249 } _sigpoll;
250
251 struct {
252 compat_uptr_t _call_addr; /* calling user insn */
253 int _syscall; /* triggering system call number */
254 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
255 } _sigsys;
256 } _sifields;
257} compat_siginfo_t;
258
259/*
260 * These functions operate on 32- or 64-bit specs depending on
261 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
262 */
263extern int compat_get_timespec(struct timespec *, const void __user *);
264extern int compat_put_timespec(const struct timespec *, void __user *);
265extern int compat_get_timeval(struct timeval *, const void __user *);
266extern int compat_put_timeval(const struct timeval *, void __user *);
267
268struct compat_iovec {
269 compat_uptr_t iov_base;
270 compat_size_t iov_len;
271};
272
273struct compat_rlimit {
274 compat_ulong_t rlim_cur;
275 compat_ulong_t rlim_max;
276};
277
278struct compat_rusage {
279 struct old_timeval32 ru_utime;
280 struct old_timeval32 ru_stime;
281 compat_long_t ru_maxrss;
282 compat_long_t ru_ixrss;
283 compat_long_t ru_idrss;
284 compat_long_t ru_isrss;
285 compat_long_t ru_minflt;
286 compat_long_t ru_majflt;
287 compat_long_t ru_nswap;
288 compat_long_t ru_inblock;
289 compat_long_t ru_oublock;
290 compat_long_t ru_msgsnd;
291 compat_long_t ru_msgrcv;
292 compat_long_t ru_nsignals;
293 compat_long_t ru_nvcsw;
294 compat_long_t ru_nivcsw;
295};
296
297extern int put_compat_rusage(const struct rusage *,
298 struct compat_rusage __user *);
299
300struct compat_siginfo;
301struct __compat_aio_sigset;
302
303struct compat_dirent {
304 u32 d_ino;
305 compat_off_t d_off;
306 u16 d_reclen;
307 char d_name[256];
308};
309
310struct compat_ustat {
311 compat_daddr_t f_tfree;
312 compat_ino_t f_tinode;
313 char f_fname[6];
314 char f_fpack[6];
315};
316
317#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
318
319typedef struct compat_sigevent {
320 compat_sigval_t sigev_value;
321 compat_int_t sigev_signo;
322 compat_int_t sigev_notify;
323 union {
324 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
325 compat_int_t _tid;
326
327 struct {
328 compat_uptr_t _function;
329 compat_uptr_t _attribute;
330 } _sigev_thread;
331 } _sigev_un;
332} compat_sigevent_t;
333
334struct compat_ifmap {
335 compat_ulong_t mem_start;
336 compat_ulong_t mem_end;
337 unsigned short base_addr;
338 unsigned char irq;
339 unsigned char dma;
340 unsigned char port;
341};
342
343struct compat_if_settings {
344 unsigned int type; /* Type of physical device or protocol */
345 unsigned int size; /* Size of the data allocated by the caller */
346 compat_uptr_t ifs_ifsu; /* union of pointers */
347};
348
349struct compat_ifreq {
350 union {
351 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
352 } ifr_ifrn;
353 union {
354 struct sockaddr ifru_addr;
355 struct sockaddr ifru_dstaddr;
356 struct sockaddr ifru_broadaddr;
357 struct sockaddr ifru_netmask;
358 struct sockaddr ifru_hwaddr;
359 short ifru_flags;
360 compat_int_t ifru_ivalue;
361 compat_int_t ifru_mtu;
362 struct compat_ifmap ifru_map;
363 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
364 char ifru_newname[IFNAMSIZ];
365 compat_caddr_t ifru_data;
366 struct compat_if_settings ifru_settings;
367 } ifr_ifru;
368};
369
370struct compat_ifconf {
371 compat_int_t ifc_len; /* size of buffer */
372 compat_caddr_t ifcbuf;
373};
374
375struct compat_robust_list {
376 compat_uptr_t next;
377};
378
379struct compat_robust_list_head {
380 struct compat_robust_list list;
381 compat_long_t futex_offset;
382 compat_uptr_t list_op_pending;
383};
384
385#ifdef CONFIG_COMPAT_OLD_SIGACTION
386struct compat_old_sigaction {
387 compat_uptr_t sa_handler;
388 compat_old_sigset_t sa_mask;
389 compat_ulong_t sa_flags;
390 compat_uptr_t sa_restorer;
391};
392#endif
393
394struct compat_keyctl_kdf_params {
395 compat_uptr_t hashname;
396 compat_uptr_t otherinfo;
397 __u32 otherinfolen;
398 __u32 __spare[8];
399};
400
401struct compat_statfs;
402struct compat_statfs64;
403struct compat_old_linux_dirent;
404struct compat_linux_dirent;
405struct linux_dirent64;
406struct compat_msghdr;
407struct compat_mmsghdr;
408struct compat_sysinfo;
409struct compat_sysctl_args;
410struct compat_kexec_segment;
411struct compat_mq_attr;
412struct compat_msgbuf;
413
414extern void compat_exit_robust_list(struct task_struct *curr);
415
416#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
417
418#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
419
420long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
421 unsigned long bitmap_size);
422long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
423 unsigned long bitmap_size);
424int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
425int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
426int get_compat_sigevent(struct sigevent *event,
427 const struct compat_sigevent __user *u_event);
428
429static inline int old_timeval32_compare(struct old_timeval32 *lhs,
430 struct old_timeval32 *rhs)
431{
432 if (lhs->tv_sec < rhs->tv_sec)
433 return -1;
434 if (lhs->tv_sec > rhs->tv_sec)
435 return 1;
436 return lhs->tv_usec - rhs->tv_usec;
437}
438
439static inline int old_timespec32_compare(struct old_timespec32 *lhs,
440 struct old_timespec32 *rhs)
441{
442 if (lhs->tv_sec < rhs->tv_sec)
443 return -1;
444 if (lhs->tv_sec > rhs->tv_sec)
445 return 1;
446 return lhs->tv_nsec - rhs->tv_nsec;
447}
448
449extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
450
451/*
452 * Defined inline such that size can be compile time constant, which avoids
453 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
454 */
455static inline int
456put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
457 unsigned int size)
458{
459 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
460#ifdef __BIG_ENDIAN
461 compat_sigset_t v;
462 switch (_NSIG_WORDS) {
463 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
464 /* fall through */
465 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
466 /* fall through */
467 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
468 /* fall through */
469 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
470 }
471 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
472#else
473 return copy_to_user(compat, set, size) ? -EFAULT : 0;
474#endif
475}
476
477extern int compat_ptrace_request(struct task_struct *child,
478 compat_long_t request,
479 compat_ulong_t addr, compat_ulong_t data);
480
481extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
482 compat_ulong_t addr, compat_ulong_t data);
483
484struct epoll_event; /* fortunately, this one is fixed-layout */
485
486extern ssize_t compat_rw_copy_check_uvector(int type,
487 const struct compat_iovec __user *uvector,
488 unsigned long nr_segs,
489 unsigned long fast_segs, struct iovec *fast_pointer,
490 struct iovec **ret_pointer);
491
492extern void __user *compat_alloc_user_space(unsigned long len);
493
494int compat_restore_altstack(const compat_stack_t __user *uss);
495int __compat_save_altstack(compat_stack_t __user *, unsigned long);
496#define compat_save_altstack_ex(uss, sp) do { \
497 compat_stack_t __user *__uss = uss; \
498 struct task_struct *t = current; \
499 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
500 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
501 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
502 if (t->sas_ss_flags & SS_AUTODISARM) \
503 sas_ss_reset(t); \
504} while (0);
505
506/*
507 * These syscall function prototypes are kept in the same order as
508 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
509 * go below.
510 *
511 * Please note that these prototypes here are only provided for information
512 * purposes, for static analysis, and for linking from the syscall table.
513 * These functions should not be called elsewhere from kernel code.
514 *
515 * As the syscall calling convention may be different from the default
516 * for architectures overriding the syscall calling convention, do not
517 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
518 */
519#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
520asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
521asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
522 u32 __user *iocb);
523asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
524 compat_long_t min_nr,
525 compat_long_t nr,
526 struct io_event __user *events,
527 struct old_timespec32 __user *timeout,
528 const struct __compat_aio_sigset __user *usig);
529asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
530 compat_long_t min_nr,
531 compat_long_t nr,
532 struct io_event __user *events,
533 struct __kernel_timespec __user *timeout,
534 const struct __compat_aio_sigset __user *usig);
535
536/* fs/cookies.c */
537asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
538
539/* fs/eventpoll.c */
540asmlinkage long compat_sys_epoll_pwait(int epfd,
541 struct epoll_event __user *events,
542 int maxevents, int timeout,
543 const compat_sigset_t __user *sigmask,
544 compat_size_t sigsetsize);
545
546/* fs/fcntl.c */
547asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
548 compat_ulong_t arg);
549asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
550 compat_ulong_t arg);
551
552/* fs/ioctl.c */
553asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
554 compat_ulong_t arg);
555
556/* fs/namespace.c */
557asmlinkage long compat_sys_mount(const char __user *dev_name,
558 const char __user *dir_name,
559 const char __user *type, compat_ulong_t flags,
560 const void __user *data);
561
562/* fs/open.c */
563asmlinkage long compat_sys_statfs(const char __user *pathname,
564 struct compat_statfs __user *buf);
565asmlinkage long compat_sys_statfs64(const char __user *pathname,
566 compat_size_t sz,
567 struct compat_statfs64 __user *buf);
568asmlinkage long compat_sys_fstatfs(unsigned int fd,
569 struct compat_statfs __user *buf);
570asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
571 struct compat_statfs64 __user *buf);
572asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
573asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
574/* No generic prototype for truncate64, ftruncate64, fallocate */
575asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
576 int flags, umode_t mode);
577
578/* fs/readdir.c */
579asmlinkage long compat_sys_getdents(unsigned int fd,
580 struct compat_linux_dirent __user *dirent,
581 unsigned int count);
582
583/* fs/read_write.c */
584asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
585asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
586 const struct compat_iovec __user *vec, compat_ulong_t vlen);
587asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
588 const struct compat_iovec __user *vec, compat_ulong_t vlen);
589/* No generic prototype for pread64 and pwrite64 */
590asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
591 const struct compat_iovec __user *vec,
592 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
593asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
594 const struct compat_iovec __user *vec,
595 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
596#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
597asmlinkage long compat_sys_preadv64(unsigned long fd,
598 const struct compat_iovec __user *vec,
599 unsigned long vlen, loff_t pos);
600#endif
601
602#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
603asmlinkage long compat_sys_pwritev64(unsigned long fd,
604 const struct compat_iovec __user *vec,
605 unsigned long vlen, loff_t pos);
606#endif
607
608/* fs/sendfile.c */
609asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
610 compat_off_t __user *offset, compat_size_t count);
611asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
612 compat_loff_t __user *offset, compat_size_t count);
613
614/* fs/select.c */
615asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
616 compat_ulong_t __user *outp,
617 compat_ulong_t __user *exp,
618 struct old_timespec32 __user *tsp,
619 void __user *sig);
620asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
621 compat_ulong_t __user *outp,
622 compat_ulong_t __user *exp,
623 struct __kernel_timespec __user *tsp,
624 void __user *sig);
625asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
626 unsigned int nfds,
627 struct old_timespec32 __user *tsp,
628 const compat_sigset_t __user *sigmask,
629 compat_size_t sigsetsize);
630asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
631 unsigned int nfds,
632 struct __kernel_timespec __user *tsp,
633 const compat_sigset_t __user *sigmask,
634 compat_size_t sigsetsize);
635
636/* fs/signalfd.c */
637asmlinkage long compat_sys_signalfd4(int ufd,
638 const compat_sigset_t __user *sigmask,
639 compat_size_t sigsetsize, int flags);
640
641/* fs/splice.c */
642asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
643 unsigned int nr_segs, unsigned int flags);
644
645/* fs/stat.c */
646asmlinkage long compat_sys_newfstatat(unsigned int dfd,
647 const char __user *filename,
648 struct compat_stat __user *statbuf,
649 int flag);
650asmlinkage long compat_sys_newfstat(unsigned int fd,
651 struct compat_stat __user *statbuf);
652
653/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
654
655/* kernel/exit.c */
656asmlinkage long compat_sys_waitid(int, compat_pid_t,
657 struct compat_siginfo __user *, int,
658 struct compat_rusage __user *);
659
660
661
662/* kernel/futex.c */
663asmlinkage long
664compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
665 compat_size_t len);
666asmlinkage long
667compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
668 compat_size_t __user *len_ptr);
669
670/* kernel/itimer.c */
671asmlinkage long compat_sys_getitimer(int which,
672 struct compat_itimerval __user *it);
673asmlinkage long compat_sys_setitimer(int which,
674 struct compat_itimerval __user *in,
675 struct compat_itimerval __user *out);
676
677/* kernel/kexec.c */
678asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
679 compat_ulong_t nr_segments,
680 struct compat_kexec_segment __user *,
681 compat_ulong_t flags);
682
683/* kernel/posix-timers.c */
684asmlinkage long compat_sys_timer_create(clockid_t which_clock,
685 struct compat_sigevent __user *timer_event_spec,
686 timer_t __user *created_timer_id);
687
688/* kernel/ptrace.c */
689asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
690 compat_long_t addr, compat_long_t data);
691
692/* kernel/sched/core.c */
693asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
694 unsigned int len,
695 compat_ulong_t __user *user_mask_ptr);
696asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
697 unsigned int len,
698 compat_ulong_t __user *user_mask_ptr);
699
700/* kernel/signal.c */
701asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
702 compat_stack_t __user *uoss_ptr);
703asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
704 compat_size_t sigsetsize);
705#ifndef CONFIG_ODD_RT_SIGACTION
706asmlinkage long compat_sys_rt_sigaction(int,
707 const struct compat_sigaction __user *,
708 struct compat_sigaction __user *,
709 compat_size_t);
710#endif
711asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
712 compat_sigset_t __user *oset,
713 compat_size_t sigsetsize);
714asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
715 compat_size_t sigsetsize);
716asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
717 struct compat_siginfo __user *uinfo,
718 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
719asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
720 struct compat_siginfo __user *uinfo,
721 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
722asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
723 struct compat_siginfo __user *uinfo);
724/* No generic prototype for rt_sigreturn */
725
726/* kernel/sys.c */
727asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
728asmlinkage long compat_sys_getrlimit(unsigned int resource,
729 struct compat_rlimit __user *rlim);
730asmlinkage long compat_sys_setrlimit(unsigned int resource,
731 struct compat_rlimit __user *rlim);
732asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
733
734/* kernel/time.c */
735asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
736 struct timezone __user *tz);
737asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
738 struct timezone __user *tz);
739
740/* kernel/timer.c */
741asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
742
743/* ipc/mqueue.c */
744asmlinkage long compat_sys_mq_open(const char __user *u_name,
745 int oflag, compat_mode_t mode,
746 struct compat_mq_attr __user *u_attr);
747asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
748 const struct compat_sigevent __user *u_notification);
749asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
750 const struct compat_mq_attr __user *u_mqstat,
751 struct compat_mq_attr __user *u_omqstat);
752
753/* ipc/msg.c */
754asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
755asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
756 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
757asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
758 compat_ssize_t msgsz, int msgflg);
759
760/* ipc/sem.c */
761asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
762
763/* ipc/shm.c */
764asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
765asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
766
767/* net/socket.c */
768asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
769 unsigned flags, struct sockaddr __user *addr,
770 int __user *addrlen);
771asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
772 char __user *optval, unsigned int optlen);
773asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
774 char __user *optval, int __user *optlen);
775asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
776 unsigned flags);
777asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
778 unsigned int flags);
779
780/* mm/filemap.c: No generic prototype for readahead */
781
782/* security/keys/keyctl.c */
783asmlinkage long compat_sys_keyctl(u32 option,
784 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
785
786/* arch/example/kernel/sys_example.c */
787asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
788 const compat_uptr_t __user *envp);
789
790/* mm/fadvise.c: No generic prototype for fadvise64_64 */
791
792/* mm/, CONFIG_MMU only */
793asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
794 compat_ulong_t mode,
795 compat_ulong_t __user *nmask,
796 compat_ulong_t maxnode, compat_ulong_t flags);
797asmlinkage long compat_sys_get_mempolicy(int __user *policy,
798 compat_ulong_t __user *nmask,
799 compat_ulong_t maxnode,
800 compat_ulong_t addr,
801 compat_ulong_t flags);
802asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
803 compat_ulong_t maxnode);
804asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
805 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
806 const compat_ulong_t __user *new_nodes);
807asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
808 __u32 __user *pages,
809 const int __user *nodes,
810 int __user *status,
811 int flags);
812
813asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
814 compat_pid_t pid, int sig,
815 struct compat_siginfo __user *uinfo);
816asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
817 unsigned vlen, unsigned int flags,
818 struct __kernel_timespec __user *timeout);
819asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
820 unsigned vlen, unsigned int flags,
821 struct old_timespec32 __user *timeout);
822asmlinkage long compat_sys_wait4(compat_pid_t pid,
823 compat_uint_t __user *stat_addr, int options,
824 struct compat_rusage __user *ru);
825asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
826 int, const char __user *);
827asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
828 struct file_handle __user *handle,
829 int flags);
830asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
831 unsigned vlen, unsigned int flags);
832asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
833 const struct compat_iovec __user *lvec,
834 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
835 compat_ulong_t riovcnt, compat_ulong_t flags);
836asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
837 const struct compat_iovec __user *lvec,
838 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
839 compat_ulong_t riovcnt, compat_ulong_t flags);
840asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
841 const compat_uptr_t __user *argv,
842 const compat_uptr_t __user *envp, int flags);
843asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
844 const struct compat_iovec __user *vec,
845 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
846asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
847 const struct compat_iovec __user *vec,
848 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
849#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
850asmlinkage long compat_sys_readv64v2(unsigned long fd,
851 const struct compat_iovec __user *vec,
852 unsigned long vlen, loff_t pos, rwf_t flags);
853#endif
854
855#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
856asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
857 const struct compat_iovec __user *vec,
858 unsigned long vlen, loff_t pos, rwf_t flags);
859#endif
860
861
862/*
863 * Deprecated system calls which are still defined in
864 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
865 */
866
867/* __ARCH_WANT_SYSCALL_NO_AT */
868asmlinkage long compat_sys_open(const char __user *filename, int flags,
869 umode_t mode);
870
871/* __ARCH_WANT_SYSCALL_NO_FLAGS */
872asmlinkage long compat_sys_signalfd(int ufd,
873 const compat_sigset_t __user *sigmask,
874 compat_size_t sigsetsize);
875
876/* __ARCH_WANT_SYSCALL_OFF_T */
877asmlinkage long compat_sys_newstat(const char __user *filename,
878 struct compat_stat __user *statbuf);
879asmlinkage long compat_sys_newlstat(const char __user *filename,
880 struct compat_stat __user *statbuf);
881
882/* __ARCH_WANT_SYSCALL_DEPRECATED */
883asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
884 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
885 struct old_timeval32 __user *tvp);
886asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
887asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
888 unsigned flags);
889asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
890
891/* obsolete: fs/readdir.c */
892asmlinkage long compat_sys_old_readdir(unsigned int fd,
893 struct compat_old_linux_dirent __user *,
894 unsigned int count);
895
896/* obsolete: fs/select.c */
897asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
898
899/* obsolete: ipc */
900asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
901
902/* obsolete: kernel/signal.c */
903#ifdef __ARCH_WANT_SYS_SIGPENDING
904asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
905#endif
906
907#ifdef __ARCH_WANT_SYS_SIGPROCMASK
908asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
909 compat_old_sigset_t __user *oset);
910#endif
911#ifdef CONFIG_COMPAT_OLD_SIGACTION
912asmlinkage long compat_sys_sigaction(int sig,
913 const struct compat_old_sigaction __user *act,
914 struct compat_old_sigaction __user *oact);
915#endif
916
917/* obsolete: net/socket.c */
918asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
919
920#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
921
922
923/*
924 * For most but not all architectures, "am I in a compat syscall?" and
925 * "am I a compat task?" are the same question. For architectures on which
926 * they aren't the same question, arch code can override in_compat_syscall.
927 */
928
929#ifndef in_compat_syscall
930static inline bool in_compat_syscall(void) { return is_compat_task(); }
931#endif
932
933/**
934 * ns_to_old_timeval32 - Compat version of ns_to_timeval
935 * @nsec: the nanoseconds value to be converted
936 *
937 * Returns the old_timeval32 representation of the nsec parameter.
938 */
939static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
940{
941 struct timeval tv;
942 struct old_timeval32 ctv;
943
944 tv = ns_to_timeval(nsec);
945 ctv.tv_sec = tv.tv_sec;
946 ctv.tv_usec = tv.tv_usec;
947
948 return ctv;
949}
950
951/*
952 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
953 * directly. Instead, use one of the functions which work equivalently, such
954 * as the kcompat_sys_xyzyyz() functions prototyped below.
955 */
956
957int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
958 struct compat_statfs64 __user * buf);
959int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
960 struct compat_statfs64 __user * buf);
961
962#else /* !CONFIG_COMPAT */
963
964#define is_compat_task() (0)
965/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
966#define in_compat_syscall in_compat_syscall
967static inline bool in_compat_syscall(void) { return false; }
968
969#endif /* CONFIG_COMPAT */
970
971#endif /* _LINUX_COMPAT_H */
972