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/compat_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
107#define compat_jiffies_to_clock_t(x) \
108 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
109
110typedef __compat_uid32_t compat_uid_t;
111typedef __compat_gid32_t compat_gid_t;
112
113typedef compat_ulong_t compat_aio_context_t;
114
115struct compat_sel_arg_struct;
116struct rusage;
117
118struct compat_utimbuf {
119 compat_time_t actime;
120 compat_time_t modtime;
121};
122
123struct compat_itimerval {
124 struct compat_timeval it_interval;
125 struct compat_timeval it_value;
126};
127
128struct itimerval;
129int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
130int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
131
132struct compat_tms {
133 compat_clock_t tms_utime;
134 compat_clock_t tms_stime;
135 compat_clock_t tms_cutime;
136 compat_clock_t tms_cstime;
137};
138
139struct compat_timex {
140 compat_uint_t modes;
141 compat_long_t offset;
142 compat_long_t freq;
143 compat_long_t maxerror;
144 compat_long_t esterror;
145 compat_int_t status;
146 compat_long_t constant;
147 compat_long_t precision;
148 compat_long_t tolerance;
149 struct compat_timeval time;
150 compat_long_t tick;
151 compat_long_t ppsfreq;
152 compat_long_t jitter;
153 compat_int_t shift;
154 compat_long_t stabil;
155 compat_long_t jitcnt;
156 compat_long_t calcnt;
157 compat_long_t errcnt;
158 compat_long_t stbcnt;
159 compat_int_t tai;
160
161 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
162 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
163 compat_int_t:32; compat_int_t:32; compat_int_t:32;
164};
165
166struct timex;
167int compat_get_timex(struct timex *, const struct compat_timex __user *);
168int compat_put_timex(struct compat_timex __user *, const struct timex *);
169
170#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
171
172typedef struct {
173 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
174} compat_sigset_t;
175
176struct compat_sigaction {
177#ifndef __ARCH_HAS_IRIX_SIGACTION
178 compat_uptr_t sa_handler;
179 compat_ulong_t sa_flags;
180#else
181 compat_uint_t sa_flags;
182 compat_uptr_t sa_handler;
183#endif
184#ifdef __ARCH_HAS_SA_RESTORER
185 compat_uptr_t sa_restorer;
186#endif
187 compat_sigset_t sa_mask __packed;
188};
189
190typedef union compat_sigval {
191 compat_int_t sival_int;
192 compat_uptr_t sival_ptr;
193} compat_sigval_t;
194
195typedef struct compat_siginfo {
196 int si_signo;
197#ifndef __ARCH_HAS_SWAPPED_SIGINFO
198 int si_errno;
199 int si_code;
200#else
201 int si_code;
202 int si_errno;
203#endif
204
205 union {
206 int _pad[128/sizeof(int) - 3];
207
208 /* kill() */
209 struct {
210 compat_pid_t _pid; /* sender's pid */
211 __compat_uid32_t _uid; /* sender's uid */
212 } _kill;
213
214 /* POSIX.1b timers */
215 struct {
216 compat_timer_t _tid; /* timer id */
217 int _overrun; /* overrun count */
218 compat_sigval_t _sigval; /* same as below */
219 } _timer;
220
221 /* POSIX.1b signals */
222 struct {
223 compat_pid_t _pid; /* sender's pid */
224 __compat_uid32_t _uid; /* sender's uid */
225 compat_sigval_t _sigval;
226 } _rt;
227
228 /* SIGCHLD */
229 struct {
230 compat_pid_t _pid; /* which child */
231 __compat_uid32_t _uid; /* sender's uid */
232 int _status; /* exit code */
233 compat_clock_t _utime;
234 compat_clock_t _stime;
235 } _sigchld;
236
237#ifdef CONFIG_X86_X32_ABI
238 /* SIGCHLD (x32 version) */
239 struct {
240 compat_pid_t _pid; /* which child */
241 __compat_uid32_t _uid; /* sender's uid */
242 int _status; /* exit code */
243 compat_s64 _utime;
244 compat_s64 _stime;
245 } _sigchld_x32;
246#endif
247
248 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
249 struct {
250 compat_uptr_t _addr; /* faulting insn/memory ref. */
251#ifdef __ARCH_SI_TRAPNO
252 int _trapno; /* TRAP # which caused the signal */
253#endif
254#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
255 sizeof(short) : __alignof__(compat_uptr_t))
256 union {
257 /*
258 * used when si_code=BUS_MCEERR_AR or
259 * used when si_code=BUS_MCEERR_AO
260 */
261 short int _addr_lsb; /* Valid LSB of the reported address. */
262 /* used when si_code=SEGV_BNDERR */
263 struct {
264 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
265 compat_uptr_t _lower;
266 compat_uptr_t _upper;
267 } _addr_bnd;
268 /* used when si_code=SEGV_PKUERR */
269 struct {
270 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
271 u32 _pkey;
272 } _addr_pkey;
273 };
274 } _sigfault;
275
276 /* SIGPOLL */
277 struct {
278 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
279 int _fd;
280 } _sigpoll;
281
282 struct {
283 compat_uptr_t _call_addr; /* calling user insn */
284 int _syscall; /* triggering system call number */
285 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
286 } _sigsys;
287 } _sifields;
288} compat_siginfo_t;
289
290/*
291 * These functions operate on 32- or 64-bit specs depending on
292 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
293 */
294extern int compat_get_timespec(struct timespec *, const void __user *);
295extern int compat_put_timespec(const struct timespec *, void __user *);
296extern int compat_get_timeval(struct timeval *, const void __user *);
297extern int compat_put_timeval(const struct timeval *, void __user *);
298
299struct compat_iovec {
300 compat_uptr_t iov_base;
301 compat_size_t iov_len;
302};
303
304struct compat_rlimit {
305 compat_ulong_t rlim_cur;
306 compat_ulong_t rlim_max;
307};
308
309struct compat_rusage {
310 struct compat_timeval ru_utime;
311 struct compat_timeval ru_stime;
312 compat_long_t ru_maxrss;
313 compat_long_t ru_ixrss;
314 compat_long_t ru_idrss;
315 compat_long_t ru_isrss;
316 compat_long_t ru_minflt;
317 compat_long_t ru_majflt;
318 compat_long_t ru_nswap;
319 compat_long_t ru_inblock;
320 compat_long_t ru_oublock;
321 compat_long_t ru_msgsnd;
322 compat_long_t ru_msgrcv;
323 compat_long_t ru_nsignals;
324 compat_long_t ru_nvcsw;
325 compat_long_t ru_nivcsw;
326};
327
328extern int put_compat_rusage(const struct rusage *,
329 struct compat_rusage __user *);
330
331struct compat_siginfo;
332struct __compat_aio_sigset;
333
334struct compat_dirent {
335 u32 d_ino;
336 compat_off_t d_off;
337 u16 d_reclen;
338 char d_name[256];
339};
340
341struct compat_ustat {
342 compat_daddr_t f_tfree;
343 compat_ino_t f_tinode;
344 char f_fname[6];
345 char f_fpack[6];
346};
347
348#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
349
350typedef struct compat_sigevent {
351 compat_sigval_t sigev_value;
352 compat_int_t sigev_signo;
353 compat_int_t sigev_notify;
354 union {
355 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
356 compat_int_t _tid;
357
358 struct {
359 compat_uptr_t _function;
360 compat_uptr_t _attribute;
361 } _sigev_thread;
362 } _sigev_un;
363} compat_sigevent_t;
364
365struct compat_ifmap {
366 compat_ulong_t mem_start;
367 compat_ulong_t mem_end;
368 unsigned short base_addr;
369 unsigned char irq;
370 unsigned char dma;
371 unsigned char port;
372};
373
374struct compat_if_settings {
375 unsigned int type; /* Type of physical device or protocol */
376 unsigned int size; /* Size of the data allocated by the caller */
377 compat_uptr_t ifs_ifsu; /* union of pointers */
378};
379
380struct compat_ifreq {
381 union {
382 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
383 } ifr_ifrn;
384 union {
385 struct sockaddr ifru_addr;
386 struct sockaddr ifru_dstaddr;
387 struct sockaddr ifru_broadaddr;
388 struct sockaddr ifru_netmask;
389 struct sockaddr ifru_hwaddr;
390 short ifru_flags;
391 compat_int_t ifru_ivalue;
392 compat_int_t ifru_mtu;
393 struct compat_ifmap ifru_map;
394 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
395 char ifru_newname[IFNAMSIZ];
396 compat_caddr_t ifru_data;
397 struct compat_if_settings ifru_settings;
398 } ifr_ifru;
399};
400
401struct compat_ifconf {
402 compat_int_t ifc_len; /* size of buffer */
403 compat_caddr_t ifcbuf;
404};
405
406struct compat_robust_list {
407 compat_uptr_t next;
408};
409
410struct compat_robust_list_head {
411 struct compat_robust_list list;
412 compat_long_t futex_offset;
413 compat_uptr_t list_op_pending;
414};
415
416#ifdef CONFIG_COMPAT_OLD_SIGACTION
417struct compat_old_sigaction {
418 compat_uptr_t sa_handler;
419 compat_old_sigset_t sa_mask;
420 compat_ulong_t sa_flags;
421 compat_uptr_t sa_restorer;
422};
423#endif
424
425struct compat_keyctl_kdf_params {
426 compat_uptr_t hashname;
427 compat_uptr_t otherinfo;
428 __u32 otherinfolen;
429 __u32 __spare[8];
430};
431
432struct compat_statfs;
433struct compat_statfs64;
434struct compat_old_linux_dirent;
435struct compat_linux_dirent;
436struct linux_dirent64;
437struct compat_msghdr;
438struct compat_mmsghdr;
439struct compat_sysinfo;
440struct compat_sysctl_args;
441struct compat_kexec_segment;
442struct compat_mq_attr;
443struct compat_msgbuf;
444
445extern void compat_exit_robust_list(struct task_struct *curr);
446
447#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
448
449#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
450
451long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
452 unsigned long bitmap_size);
453long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
454 unsigned long bitmap_size);
455int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from);
456int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
457int get_compat_sigevent(struct sigevent *event,
458 const struct compat_sigevent __user *u_event);
459
460static inline int compat_timeval_compare(struct compat_timeval *lhs,
461 struct compat_timeval *rhs)
462{
463 if (lhs->tv_sec < rhs->tv_sec)
464 return -1;
465 if (lhs->tv_sec > rhs->tv_sec)
466 return 1;
467 return lhs->tv_usec - rhs->tv_usec;
468}
469
470static inline int compat_timespec_compare(struct compat_timespec *lhs,
471 struct compat_timespec *rhs)
472{
473 if (lhs->tv_sec < rhs->tv_sec)
474 return -1;
475 if (lhs->tv_sec > rhs->tv_sec)
476 return 1;
477 return lhs->tv_nsec - rhs->tv_nsec;
478}
479
480extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
481
482/*
483 * Defined inline such that size can be compile time constant, which avoids
484 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
485 */
486static inline int
487put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
488 unsigned int size)
489{
490 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
491#ifdef __BIG_ENDIAN
492 compat_sigset_t v;
493 switch (_NSIG_WORDS) {
494 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
495 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
496 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
497 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
498 }
499 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
500#else
501 return copy_to_user(compat, set, size) ? -EFAULT : 0;
502#endif
503}
504
505extern int compat_ptrace_request(struct task_struct *child,
506 compat_long_t request,
507 compat_ulong_t addr, compat_ulong_t data);
508
509extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
510 compat_ulong_t addr, compat_ulong_t data);
511
512struct epoll_event; /* fortunately, this one is fixed-layout */
513
514extern ssize_t compat_rw_copy_check_uvector(int type,
515 const struct compat_iovec __user *uvector,
516 unsigned long nr_segs,
517 unsigned long fast_segs, struct iovec *fast_pointer,
518 struct iovec **ret_pointer);
519
520extern void __user *compat_alloc_user_space(unsigned long len);
521
522int compat_restore_altstack(const compat_stack_t __user *uss);
523int __compat_save_altstack(compat_stack_t __user *, unsigned long);
524#define compat_save_altstack_ex(uss, sp) do { \
525 compat_stack_t __user *__uss = uss; \
526 struct task_struct *t = current; \
527 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
528 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
529 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
530 if (t->sas_ss_flags & SS_AUTODISARM) \
531 sas_ss_reset(t); \
532} while (0);
533
534/*
535 * These syscall function prototypes are kept in the same order as
536 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
537 * go below.
538 *
539 * Please note that these prototypes here are only provided for information
540 * purposes, for static analysis, and for linking from the syscall table.
541 * These functions should not be called elsewhere from kernel code.
542 *
543 * As the syscall calling convention may be different from the default
544 * for architectures overriding the syscall calling convention, do not
545 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
546 */
547#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
548asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
549asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
550 u32 __user *iocb);
551asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
552 compat_long_t min_nr,
553 compat_long_t nr,
554 struct io_event __user *events,
555 struct compat_timespec __user *timeout);
556asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
557 compat_long_t min_nr,
558 compat_long_t nr,
559 struct io_event __user *events,
560 struct compat_timespec __user *timeout,
561 const struct __compat_aio_sigset __user *usig);
562
563/* fs/cookies.c */
564asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
565
566/* fs/eventpoll.c */
567asmlinkage long compat_sys_epoll_pwait(int epfd,
568 struct epoll_event __user *events,
569 int maxevents, int timeout,
570 const compat_sigset_t __user *sigmask,
571 compat_size_t sigsetsize);
572
573/* fs/fcntl.c */
574asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
575 compat_ulong_t arg);
576asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
577 compat_ulong_t arg);
578
579/* fs/ioctl.c */
580asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
581 compat_ulong_t arg);
582
583/* fs/namespace.c */
584asmlinkage long compat_sys_mount(const char __user *dev_name,
585 const char __user *dir_name,
586 const char __user *type, compat_ulong_t flags,
587 const void __user *data);
588
589/* fs/open.c */
590asmlinkage long compat_sys_statfs(const char __user *pathname,
591 struct compat_statfs __user *buf);
592asmlinkage long compat_sys_statfs64(const char __user *pathname,
593 compat_size_t sz,
594 struct compat_statfs64 __user *buf);
595asmlinkage long compat_sys_fstatfs(unsigned int fd,
596 struct compat_statfs __user *buf);
597asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
598 struct compat_statfs64 __user *buf);
599asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
600asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
601/* No generic prototype for truncate64, ftruncate64, fallocate */
602asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
603 int flags, umode_t mode);
604
605/* fs/readdir.c */
606asmlinkage long compat_sys_getdents(unsigned int fd,
607 struct compat_linux_dirent __user *dirent,
608 unsigned int count);
609
610/* fs/read_write.c */
611asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
612asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
613 const struct compat_iovec __user *vec, compat_ulong_t vlen);
614asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
615 const struct compat_iovec __user *vec, compat_ulong_t vlen);
616/* No generic prototype for pread64 and pwrite64 */
617asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
618 const struct compat_iovec __user *vec,
619 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
620asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
621 const struct compat_iovec __user *vec,
622 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
623#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
624asmlinkage long compat_sys_preadv64(unsigned long fd,
625 const struct compat_iovec __user *vec,
626 unsigned long vlen, loff_t pos);
627#endif
628
629#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
630asmlinkage long compat_sys_pwritev64(unsigned long fd,
631 const struct compat_iovec __user *vec,
632 unsigned long vlen, loff_t pos);
633#endif
634
635/* fs/sendfile.c */
636asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
637 compat_off_t __user *offset, compat_size_t count);
638asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
639 compat_loff_t __user *offset, compat_size_t count);
640
641/* fs/select.c */
642asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
643 compat_ulong_t __user *outp,
644 compat_ulong_t __user *exp,
645 struct compat_timespec __user *tsp,
646 void __user *sig);
647asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
648 unsigned int nfds,
649 struct compat_timespec __user *tsp,
650 const compat_sigset_t __user *sigmask,
651 compat_size_t sigsetsize);
652
653/* fs/signalfd.c */
654asmlinkage long compat_sys_signalfd4(int ufd,
655 const compat_sigset_t __user *sigmask,
656 compat_size_t sigsetsize, int flags);
657
658/* fs/splice.c */
659asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
660 unsigned int nr_segs, unsigned int flags);
661
662/* fs/stat.c */
663asmlinkage long compat_sys_newfstatat(unsigned int dfd,
664 const char __user *filename,
665 struct compat_stat __user *statbuf,
666 int flag);
667asmlinkage long compat_sys_newfstat(unsigned int fd,
668 struct compat_stat __user *statbuf);
669
670/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
671
672/* fs/timerfd.c */
673asmlinkage long compat_sys_timerfd_gettime(int ufd,
674 struct compat_itimerspec __user *otmr);
675asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
676 const struct compat_itimerspec __user *utmr,
677 struct compat_itimerspec __user *otmr);
678
679/* fs/utimes.c */
680asmlinkage long compat_sys_utimensat(unsigned int dfd,
681 const char __user *filename,
682 struct compat_timespec __user *t,
683 int flags);
684
685/* kernel/exit.c */
686asmlinkage long compat_sys_waitid(int, compat_pid_t,
687 struct compat_siginfo __user *, int,
688 struct compat_rusage __user *);
689
690
691
692/* kernel/futex.c */
693asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
694 struct compat_timespec __user *utime, u32 __user *uaddr2,
695 u32 val3);
696asmlinkage long
697compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
698 compat_size_t len);
699asmlinkage long
700compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
701 compat_size_t __user *len_ptr);
702
703/* kernel/hrtimer.c */
704asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
705 struct compat_timespec __user *rmtp);
706
707/* kernel/itimer.c */
708asmlinkage long compat_sys_getitimer(int which,
709 struct compat_itimerval __user *it);
710asmlinkage long compat_sys_setitimer(int which,
711 struct compat_itimerval __user *in,
712 struct compat_itimerval __user *out);
713
714/* kernel/kexec.c */
715asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
716 compat_ulong_t nr_segments,
717 struct compat_kexec_segment __user *,
718 compat_ulong_t flags);
719
720/* kernel/posix-timers.c */
721asmlinkage long compat_sys_timer_create(clockid_t which_clock,
722 struct compat_sigevent __user *timer_event_spec,
723 timer_t __user *created_timer_id);
724asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
725 struct compat_itimerspec __user *setting);
726asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
727 struct compat_itimerspec __user *new,
728 struct compat_itimerspec __user *old);
729asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
730 struct compat_timespec __user *tp);
731asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
732 struct compat_timespec __user *tp);
733asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
734 struct compat_timespec __user *tp);
735asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
736 struct compat_timespec __user *rqtp,
737 struct compat_timespec __user *rmtp);
738
739/* kernel/ptrace.c */
740asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
741 compat_long_t addr, compat_long_t data);
742
743/* kernel/sched/core.c */
744asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
745 unsigned int len,
746 compat_ulong_t __user *user_mask_ptr);
747asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
748 unsigned int len,
749 compat_ulong_t __user *user_mask_ptr);
750asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
751 struct compat_timespec __user *interval);
752
753/* kernel/signal.c */
754asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
755 compat_stack_t __user *uoss_ptr);
756asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
757 compat_size_t sigsetsize);
758#ifndef CONFIG_ODD_RT_SIGACTION
759asmlinkage long compat_sys_rt_sigaction(int,
760 const struct compat_sigaction __user *,
761 struct compat_sigaction __user *,
762 compat_size_t);
763#endif
764asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
765 compat_sigset_t __user *oset,
766 compat_size_t sigsetsize);
767asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
768 compat_size_t sigsetsize);
769asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
770 struct compat_siginfo __user *uinfo,
771 struct compat_timespec __user *uts, compat_size_t sigsetsize);
772asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
773 struct compat_siginfo __user *uinfo);
774/* No generic prototype for rt_sigreturn */
775
776/* kernel/sys.c */
777asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
778asmlinkage long compat_sys_getrlimit(unsigned int resource,
779 struct compat_rlimit __user *rlim);
780asmlinkage long compat_sys_setrlimit(unsigned int resource,
781 struct compat_rlimit __user *rlim);
782asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
783
784/* kernel/time.c */
785asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
786 struct timezone __user *tz);
787asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
788 struct timezone __user *tz);
789asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
790
791/* kernel/timer.c */
792asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
793
794/* ipc/mqueue.c */
795asmlinkage long compat_sys_mq_open(const char __user *u_name,
796 int oflag, compat_mode_t mode,
797 struct compat_mq_attr __user *u_attr);
798asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
799 const char __user *u_msg_ptr,
800 compat_size_t msg_len, unsigned int msg_prio,
801 const struct compat_timespec __user *u_abs_timeout);
802asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
803 char __user *u_msg_ptr,
804 compat_size_t msg_len, unsigned int __user *u_msg_prio,
805 const struct compat_timespec __user *u_abs_timeout);
806asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
807 const struct compat_sigevent __user *u_notification);
808asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
809 const struct compat_mq_attr __user *u_mqstat,
810 struct compat_mq_attr __user *u_omqstat);
811
812/* ipc/msg.c */
813asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
814asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
815 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
816asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
817 compat_ssize_t msgsz, int msgflg);
818
819/* ipc/sem.c */
820asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
821asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
822 unsigned nsems, const struct compat_timespec __user *timeout);
823
824/* ipc/shm.c */
825asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
826asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
827
828/* net/socket.c */
829asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
830 unsigned flags, struct sockaddr __user *addr,
831 int __user *addrlen);
832asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
833 char __user *optval, unsigned int optlen);
834asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
835 char __user *optval, int __user *optlen);
836asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
837 unsigned flags);
838asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
839 unsigned int flags);
840
841/* mm/filemap.c: No generic prototype for readahead */
842
843/* security/keys/keyctl.c */
844asmlinkage long compat_sys_keyctl(u32 option,
845 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
846
847/* arch/example/kernel/sys_example.c */
848asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
849 const compat_uptr_t __user *envp);
850
851/* mm/fadvise.c: No generic prototype for fadvise64_64 */
852
853/* mm/, CONFIG_MMU only */
854asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
855 compat_ulong_t mode,
856 compat_ulong_t __user *nmask,
857 compat_ulong_t maxnode, compat_ulong_t flags);
858asmlinkage long compat_sys_get_mempolicy(int __user *policy,
859 compat_ulong_t __user *nmask,
860 compat_ulong_t maxnode,
861 compat_ulong_t addr,
862 compat_ulong_t flags);
863asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
864 compat_ulong_t maxnode);
865asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
866 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
867 const compat_ulong_t __user *new_nodes);
868asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
869 __u32 __user *pages,
870 const int __user *nodes,
871 int __user *status,
872 int flags);
873
874asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
875 compat_pid_t pid, int sig,
876 struct compat_siginfo __user *uinfo);
877asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
878 unsigned vlen, unsigned int flags,
879 struct compat_timespec __user *timeout);
880asmlinkage long compat_sys_wait4(compat_pid_t pid,
881 compat_uint_t __user *stat_addr, int options,
882 struct compat_rusage __user *ru);
883asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
884 int, const char __user *);
885asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
886 struct file_handle __user *handle,
887 int flags);
888asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
889 struct compat_timex __user *tp);
890asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
891 unsigned vlen, unsigned int flags);
892asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
893 const struct compat_iovec __user *lvec,
894 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
895 compat_ulong_t riovcnt, compat_ulong_t flags);
896asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
897 const struct compat_iovec __user *lvec,
898 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
899 compat_ulong_t riovcnt, compat_ulong_t flags);
900asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
901 const compat_uptr_t __user *argv,
902 const compat_uptr_t __user *envp, int flags);
903asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
904 const struct compat_iovec __user *vec,
905 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
906asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
907 const struct compat_iovec __user *vec,
908 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
909#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
910asmlinkage long compat_sys_readv64v2(unsigned long fd,
911 const struct compat_iovec __user *vec,
912 unsigned long vlen, loff_t pos, rwf_t flags);
913#endif
914
915#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
916asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
917 const struct compat_iovec __user *vec,
918 unsigned long vlen, loff_t pos, rwf_t flags);
919#endif
920
921
922/*
923 * Deprecated system calls which are still defined in
924 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
925 */
926
927/* __ARCH_WANT_SYSCALL_NO_AT */
928asmlinkage long compat_sys_open(const char __user *filename, int flags,
929 umode_t mode);
930asmlinkage long compat_sys_utimes(const char __user *filename,
931 struct compat_timeval __user *t);
932
933/* __ARCH_WANT_SYSCALL_NO_FLAGS */
934asmlinkage long compat_sys_signalfd(int ufd,
935 const compat_sigset_t __user *sigmask,
936 compat_size_t sigsetsize);
937
938/* __ARCH_WANT_SYSCALL_OFF_T */
939asmlinkage long compat_sys_newstat(const char __user *filename,
940 struct compat_stat __user *statbuf);
941asmlinkage long compat_sys_newlstat(const char __user *filename,
942 struct compat_stat __user *statbuf);
943
944/* __ARCH_WANT_SYSCALL_DEPRECATED */
945asmlinkage long compat_sys_time(compat_time_t __user *tloc);
946asmlinkage long compat_sys_utime(const char __user *filename,
947 struct compat_utimbuf __user *t);
948asmlinkage long compat_sys_futimesat(unsigned int dfd,
949 const char __user *filename,
950 struct compat_timeval __user *t);
951asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
952 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
953 struct compat_timeval __user *tvp);
954asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
955asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
956 unsigned flags);
957asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
958
959/* obsolete: fs/readdir.c */
960asmlinkage long compat_sys_old_readdir(unsigned int fd,
961 struct compat_old_linux_dirent __user *,
962 unsigned int count);
963
964/* obsolete: fs/select.c */
965asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
966
967/* obsolete: ipc */
968asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
969
970/* obsolete: kernel/signal.c */
971#ifdef __ARCH_WANT_SYS_SIGPENDING
972asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
973#endif
974
975#ifdef __ARCH_WANT_SYS_SIGPROCMASK
976asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
977 compat_old_sigset_t __user *oset);
978#endif
979#ifdef CONFIG_COMPAT_OLD_SIGACTION
980asmlinkage long compat_sys_sigaction(int sig,
981 const struct compat_old_sigaction __user *act,
982 struct compat_old_sigaction __user *oact);
983#endif
984
985/* obsolete: kernel/time/time.c */
986asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
987
988/* obsolete: net/socket.c */
989asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
990
991#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
992
993
994/*
995 * For most but not all architectures, "am I in a compat syscall?" and
996 * "am I a compat task?" are the same question. For architectures on which
997 * they aren't the same question, arch code can override in_compat_syscall.
998 */
999
1000#ifndef in_compat_syscall
1001static inline bool in_compat_syscall(void) { return is_compat_task(); }
1002#endif
1003
1004/**
1005 * ns_to_compat_timeval - Compat version of ns_to_timeval
1006 * @nsec: the nanoseconds value to be converted
1007 *
1008 * Returns the compat_timeval representation of the nsec parameter.
1009 */
1010static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
1011{
1012 struct timeval tv;
1013 struct compat_timeval ctv;
1014
1015 tv = ns_to_timeval(nsec);
1016 ctv.tv_sec = tv.tv_sec;
1017 ctv.tv_usec = tv.tv_usec;
1018
1019 return ctv;
1020}
1021
1022/*
1023 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
1024 * directly. Instead, use one of the functions which work equivalently, such
1025 * as the kcompat_sys_xyzyyz() functions prototyped below.
1026 */
1027
1028int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
1029 struct compat_statfs64 __user * buf);
1030int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
1031 struct compat_statfs64 __user * buf);
1032
1033#else /* !CONFIG_COMPAT */
1034
1035#define is_compat_task() (0)
1036#ifndef in_compat_syscall
1037static inline bool in_compat_syscall(void) { return false; }
1038#endif
1039
1040#endif /* CONFIG_COMPAT */
1041
1042#endif /* _LINUX_COMPAT_H */
1043