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mm: simplify compat_sys_move_pages
[linux-block.git] / include / linux / compat.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
LT		 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 */
1da177e4 8
5180e3e2 9#include <linux/types.h>
9afc5eee 10#include <linux/time.h>
1da177e4
LT		 11
12#include <linux/stat.h>
13#include <linux/param.h> /* for HZ */
14#include <linux/sem.h>
2dceba14
AB		 15#include <linux/socket.h>
16#include <linux/if.h>
be84cb43 17#include <linux/fs.h>
45e9683e 18#include <linux/aio_abi.h> /* for aio_context_t */
fde9fc76 19#include <linux/uaccess.h>
f5b972e9 20#include <linux/unistd.h>
1da177e4
LT		 21
22#include <asm/compat.h>
23#include <asm/siginfo.h>
3f2e05e9 24#include <asm/signal.h>
1da177e4 25
7303e30e
DB		 26#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
27/*
28 * It may be useful for an architecture to override the definitions of the
29 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
30 * to use a different calling convention for syscalls. To allow for that,
31 + the prototypes for the compat_sys_*() functions below will *not* be included
32 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
33 */
34#include <asm/syscall_wrapper.h>
35#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
36
45e87781
L		 37#ifndef COMPAT_USE_64BIT_TIME
38#define COMPAT_USE_64BIT_TIME 0
39#endif
40
46836613 41#ifndef __SC_DELOUSE
4f59c718 42#define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
46836613
AV		 43#endif
44
7303e30e 45#ifndef COMPAT_SYSCALL_DEFINE0
217f4433 46#define COMPAT_SYSCALL_DEFINE0(name) \
c9a21195
HM		 47 asmlinkage long compat_sys_##name(void); \
48 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
217f4433 49 asmlinkage long compat_sys_##name(void)
7303e30e 50#endif /* COMPAT_SYSCALL_DEFINE0 */
217f4433 51
46836613
AV		 52#define COMPAT_SYSCALL_DEFINE1(name, ...) \
53 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
54#define COMPAT_SYSCALL_DEFINE2(name, ...) \
55 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
56#define COMPAT_SYSCALL_DEFINE3(name, ...) \
57 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
58#define COMPAT_SYSCALL_DEFINE4(name, ...) \
59 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
60#define COMPAT_SYSCALL_DEFINE5(name, ...) \
61 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
62#define COMPAT_SYSCALL_DEFINE6(name, ...) \
63 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
64
5ac9efa3
DB		 65/*
66 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
67 * sign-extends 32-bit ints to longs whenever needed. The actual work is
68 * done within __do_compat_sys_*().
69 */
7303e30e 70#ifndef COMPAT_SYSCALL_DEFINEx
5ac9efa3 71#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
bee20031
AB		 72 __diag_push(); \
73 __diag_ignore(GCC, 8, "-Wattribute-alias", \
74 "Type aliasing is used to sanitize syscall arguments");\
5ac9efa3
DB		 75 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
76 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
77 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
78 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
80 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
81 { \
bee20031
AB		 82 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
83 __MAP(x,__SC_TEST,__VA_ARGS__); \
84 return ret; \
5ac9efa3 85 } \
bee20031 86 __diag_pop(); \
5ac9efa3 87 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
7303e30e 88#endif /* COMPAT_SYSCALL_DEFINEx */
46836613 89
bfdc5970
CH		 90struct compat_iovec {
91 compat_uptr_t iov_base;
92 compat_size_t iov_len;
93};
94
9b064fc3
AV		 95#ifndef compat_user_stack_pointer
96#define compat_user_stack_pointer() current_user_stack_pointer()
97#endif
90268439
AV		 98#ifndef compat_sigaltstack /* we'll need that for MIPS */
99typedef struct compat_sigaltstack {
100 compat_uptr_t ss_sp;
101 int ss_flags;
102 compat_size_t ss_size;
103} compat_stack_t;
104#endif
22839869
WD		 105#ifndef COMPAT_MINSIGSTKSZ
106#define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
107#endif
90268439 108
1da177e4
LT		 109#define compat_jiffies_to_clock_t(x) \
110 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
111
202e5979
SR		 112typedef __compat_uid32_t compat_uid_t;
113typedef __compat_gid32_t compat_gid_t;
114
5d0e5283 115struct compat_sel_arg_struct;
1da177e4
LT		 116struct rusage;
117
c1745f84 118struct old_itimerval32;
54ad9c46 119
1da177e4
LT		 120struct compat_tms {
121 compat_clock_t tms_utime;
122 compat_clock_t tms_stime;
123 compat_clock_t tms_cutime;
124 compat_clock_t tms_cstime;
125};
126
127#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
128
1a33b18b 129#ifndef compat_sigset_t
1da177e4
LT		 130typedef struct {
131 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
132} compat_sigset_t;
1a33b18b 133#endif
1da177e4 134
b772434b 135int set_compat_user_sigmask(const compat_sigset_t __user *umask,
ded653cc
DD		 136 size_t sigsetsize);
137
08d32fe5 138struct compat_sigaction {
2a148698 139#ifndef __ARCH_HAS_IRIX_SIGACTION
08d32fe5
AV		 140 compat_uptr_t sa_handler;
141 compat_ulong_t sa_flags;
142#else
2a148698 143 compat_uint_t sa_flags;
08d32fe5
AV		 144 compat_uptr_t sa_handler;
145#endif
146#ifdef __ARCH_HAS_SA_RESTORER
147 compat_uptr_t sa_restorer;
148#endif
149 compat_sigset_t sa_mask __packed;
150};
08d32fe5 151
b713da69
AV		 152typedef union compat_sigval {
153 compat_int_t sival_int;
154 compat_uptr_t sival_ptr;
155} compat_sigval_t;
156
157typedef struct compat_siginfo {
158 int si_signo;
159#ifndef __ARCH_HAS_SWAPPED_SIGINFO
160 int si_errno;
161 int si_code;
162#else
163 int si_code;
164 int si_errno;
165#endif
166
167 union {
168 int _pad[128/sizeof(int) - 3];
169
170 /* kill() */
171 struct {
172 compat_pid_t _pid; /* sender's pid */
173 __compat_uid32_t _uid; /* sender's uid */
174 } _kill;
175
176 /* POSIX.1b timers */
177 struct {
178 compat_timer_t _tid; /* timer id */
179 int _overrun; /* overrun count */
180 compat_sigval_t _sigval; /* same as below */
181 } _timer;
182
183 /* POSIX.1b signals */
184 struct {
185 compat_pid_t _pid; /* sender's pid */
186 __compat_uid32_t _uid; /* sender's uid */
187 compat_sigval_t _sigval;
188 } _rt;
189
190 /* SIGCHLD */
191 struct {
192 compat_pid_t _pid; /* which child */
193 __compat_uid32_t _uid; /* sender's uid */
194 int _status; /* exit code */
195 compat_clock_t _utime;
196 compat_clock_t _stime;
197 } _sigchld;
198
199#ifdef CONFIG_X86_X32_ABI
200 /* SIGCHLD (x32 version) */
201 struct {
202 compat_pid_t _pid; /* which child */
203 __compat_uid32_t _uid; /* sender's uid */
204 int _status; /* exit code */
205 compat_s64 _utime;
206 compat_s64 _stime;
207 } _sigchld_x32;
208#endif
209
210 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
211 struct {
212 compat_uptr_t _addr; /* faulting insn/memory ref. */
8420f719
EB		 213#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
214 sizeof(short) : __alignof__(compat_uptr_t))
b713da69 215 union {
add0b32e
EB		 216 /* used on alpha and sparc */
217 int _trapno; /* TRAP # which caused the signal */
b68a68d3
EB		 218 /*
219 * used when si_code=BUS_MCEERR_AR or
220 * used when si_code=BUS_MCEERR_AO
221 */
222 short int _addr_lsb; /* Valid LSB of the reported address. */
b713da69
AV		 223 /* used when si_code=SEGV_BNDERR */
224 struct {
8420f719 225 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
b713da69
AV		 226 compat_uptr_t _lower;
227 compat_uptr_t _upper;
228 } _addr_bnd;
229 /* used when si_code=SEGV_PKUERR */
b68a68d3 230 struct {
8420f719 231 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
b68a68d3
EB		 232 u32 _pkey;
233 } _addr_pkey;
fb6cc127 234 /* used when si_code=TRAP_PERF */
0683b531
EB		 235 struct {
236 compat_ulong_t _data;
237 u32 _type;
238 } _perf;
b713da69
AV		 239 };
240 } _sigfault;
241
242 /* SIGPOLL */
243 struct {
244 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
245 int _fd;
246 } _sigpoll;
247
248 struct {
249 compat_uptr_t _call_addr; /* calling user insn */
250 int _syscall; /* triggering system call number */
251 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
252 } _sigsys;
253 } _sifields;
254} compat_siginfo_t;
255
1da177e4
LT		 256struct compat_rlimit {
257 compat_ulong_t rlim_cur;
258 compat_ulong_t rlim_max;
259};
260
261struct compat_rusage {
9afc5eee
AB		 262 struct old_timeval32 ru_utime;
263 struct old_timeval32 ru_stime;
1da177e4
LT		 264 compat_long_t ru_maxrss;
265 compat_long_t ru_ixrss;
266 compat_long_t ru_idrss;
267 compat_long_t ru_isrss;
268 compat_long_t ru_minflt;
269 compat_long_t ru_majflt;
270 compat_long_t ru_nswap;
271 compat_long_t ru_inblock;
272 compat_long_t ru_oublock;
273 compat_long_t ru_msgsnd;
274 compat_long_t ru_msgrcv;
275 compat_long_t ru_nsignals;
276 compat_long_t ru_nvcsw;
277 compat_long_t ru_nivcsw;
278};
279
4800a5bb
CM		 280extern int put_compat_rusage(const struct rusage *,
281 struct compat_rusage __user *);
1da177e4
LT		 282
283struct compat_siginfo;
7a074e96 284struct __compat_aio_sigset;
1da177e4 285
1da177e4
LT		 286struct compat_dirent {
287 u32 d_ino;
288 compat_off_t d_off;
289 u16 d_reclen;
290 char d_name[256];
291};
292
2b1c6bd7
CH		 293struct compat_ustat {
294 compat_daddr_t f_tfree;
295 compat_ino_t f_tinode;
296 char f_fname[6];
297 char f_fpack[6];
298};
299
1da177e4
LT		 300#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
301
302typedef struct compat_sigevent {
303 compat_sigval_t sigev_value;
304 compat_int_t sigev_signo;
305 compat_int_t sigev_notify;
306 union {
307 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
308 compat_int_t _tid;
309
310 struct {
311 compat_uptr_t _function;
312 compat_uptr_t _attribute;
313 } _sigev_thread;
314 } _sigev_un;
315} compat_sigevent_t;
316
2dceba14
AB		 317struct compat_ifmap {
318 compat_ulong_t mem_start;
319 compat_ulong_t mem_end;
320 unsigned short base_addr;
321 unsigned char irq;
322 unsigned char dma;
323 unsigned char port;
324};
325
4800a5bb 326struct compat_if_settings {
7a50a240
AB		 327 unsigned int type; /* Type of physical device or protocol */
328 unsigned int size; /* Size of the data allocated by the caller */
329 compat_uptr_t ifs_ifsu; /* union of pointers */
330};
331
2dceba14 332struct compat_ifreq {
7a50a240
AB		 333 union {
334 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
335 } ifr_ifrn;
336 union {
337 struct sockaddr ifru_addr;
338 struct sockaddr ifru_dstaddr;
339 struct sockaddr ifru_broadaddr;
340 struct sockaddr ifru_netmask;
341 struct sockaddr ifru_hwaddr;
342 short ifru_flags;
343 compat_int_t ifru_ivalue;
344 compat_int_t ifru_mtu;
345 struct compat_ifmap ifru_map;
346 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
2dceba14 347 char ifru_newname[IFNAMSIZ];
7a50a240
AB		 348 compat_caddr_t ifru_data;
349 struct compat_if_settings ifru_settings;
350 } ifr_ifru;
2dceba14
AB		 351};
352
353struct compat_ifconf {
4800a5bb
CM		 354 compat_int_t ifc_len; /* size of buffer */
355 compat_caddr_t ifcbuf;
2dceba14
AB		 356};
357
34f192c6
IM		 358struct compat_robust_list {
359 compat_uptr_t next;
360};
361
362struct compat_robust_list_head {
363 struct compat_robust_list list;
364 compat_long_t futex_offset;
365 compat_uptr_t list_op_pending;
366};
367
495dfbf7
AV		 368#ifdef CONFIG_COMPAT_OLD_SIGACTION
369struct compat_old_sigaction {
370 compat_uptr_t sa_handler;
371 compat_old_sigset_t sa_mask;
372 compat_ulong_t sa_flags;
373 compat_uptr_t sa_restorer;
374};
375#endif
376
f1c316a3
SM		 377struct compat_keyctl_kdf_params {
378 compat_uptr_t hashname;
379 compat_uptr_t otherinfo;
380 __u32 otherinfolen;
381 __u32 __spare[8];
382};
383
1a33b18b 384struct compat_stat;
be84cb43
CM		 385struct compat_statfs;
386struct compat_statfs64;
387struct compat_old_linux_dirent;
388struct compat_linux_dirent;
389struct linux_dirent64;
390struct compat_msghdr;
391struct compat_mmsghdr;
392struct compat_sysinfo;
393struct compat_sysctl_args;
394struct compat_kexec_segment;
395struct compat_mq_attr;
48b25c43 396struct compat_msgbuf;
be84cb43 397
1da177e4
LT		 398#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
399
1e1fc133 400#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
1da177e4 401
5fa3839a 402long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
1da177e4
LT		 403 unsigned long bitmap_size);
404long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
405 unsigned long bitmap_size);
c3b3f524
CH		 406void copy_siginfo_to_external32(struct compat_siginfo *to,
407 const struct kernel_siginfo *from);
408int copy_siginfo_from_user32(kernel_siginfo_t *to,
409 const struct compat_siginfo __user *from);
410int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
411 const kernel_siginfo_t *from);
412#ifndef copy_siginfo_to_user32
413#define copy_siginfo_to_user32 __copy_siginfo_to_user32
414#endif
1da177e4
LT		 415int get_compat_sigevent(struct sigevent *event,
416 const struct compat_sigevent __user *u_event);
417
3968cf62 418extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
fde9fc76
MR		 419
420/*
421 * Defined inline such that size can be compile time constant, which avoids
422 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
423 */
424static inline int
425put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
426 unsigned int size)
427{
428 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
1a33b18b 429#if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
fde9fc76
MR		 430 compat_sigset_t v;
431 switch (_NSIG_WORDS) {
432 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
df561f66 433 fallthrough;
fde9fc76 434 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
df561f66 435 fallthrough;
fde9fc76 436 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
df561f66 437 fallthrough;
fde9fc76
MR		 438 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
439 }
440 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
441#else
442 return copy_to_user(compat, set, size) ? -EFAULT : 0;
443#endif
444}
bebfa101 445
14026b94
CL		 446#ifdef CONFIG_CPU_BIG_ENDIAN
447#define unsafe_put_compat_sigset(compat, set, label) do { \
448 compat_sigset_t __user *__c = compat; \
449 const sigset_t *__s = set; \
450 \
451 switch (_NSIG_WORDS) { \
452 case 4: \
453 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
454 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
455 fallthrough; \
456 case 3: \
457 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
458 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
459 fallthrough; \
460 case 2: \
461 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
462 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
463 fallthrough; \
464 case 1: \
465 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
466 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
467 } \
468} while (0)
fb05121f
CL		 469
470#define unsafe_get_compat_sigset(set, compat, label) do { \
471 const compat_sigset_t __user *__c = compat; \
472 compat_sigset_word hi, lo; \
473 sigset_t *__s = set; \
474 \
475 switch (_NSIG_WORDS) { \
476 case 4: \
477 unsafe_get_user(lo, &__c->sig[7], label); \
478 unsafe_get_user(hi, &__c->sig[6], label); \
479 __s->sig[3] = hi | (((long)lo) << 32); \
480 fallthrough; \
481 case 3: \
482 unsafe_get_user(lo, &__c->sig[5], label); \
483 unsafe_get_user(hi, &__c->sig[4], label); \
484 __s->sig[2] = hi | (((long)lo) << 32); \
485 fallthrough; \
486 case 2: \
487 unsafe_get_user(lo, &__c->sig[3], label); \
488 unsafe_get_user(hi, &__c->sig[2], label); \
489 __s->sig[1] = hi | (((long)lo) << 32); \
490 fallthrough; \
491 case 1: \
492 unsafe_get_user(lo, &__c->sig[1], label); \
493 unsafe_get_user(hi, &__c->sig[0], label); \
494 __s->sig[0] = hi | (((long)lo) << 32); \
495 } \
496} while (0)
14026b94
CL		 497#else
498#define unsafe_put_compat_sigset(compat, set, label) do { \
499 compat_sigset_t __user *__c = compat; \
500 const sigset_t *__s = set; \
501 \
502 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
503} while (0)
fb05121f
CL		 504
505#define unsafe_get_compat_sigset(set, compat, label) do { \
506 const compat_sigset_t __user *__c = compat; \
507 sigset_t *__s = set; \
508 \
509 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
510} while (0)
14026b94
CL		 511#endif
512
032d82d9
RM		 513extern int compat_ptrace_request(struct task_struct *child,
514 compat_long_t request,
515 compat_ulong_t addr, compat_ulong_t data);
516
c269f196
RM		 517extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
518 compat_ulong_t addr, compat_ulong_t data);
c269f196 519
c679a089
DB		 520struct epoll_event; /* fortunately, this one is fixed-layout */
521
c679a089
DB		 522extern void __user *compat_alloc_user_space(unsigned long len);
523
524int compat_restore_altstack(const compat_stack_t __user *uss);
525int __compat_save_altstack(compat_stack_t __user *, unsigned long);
39f16c1c 526#define unsafe_compat_save_altstack(uss, sp, label) do { \
c679a089
DB		 527 compat_stack_t __user *__uss = uss; \
528 struct task_struct *t = current; \
39f16c1c
AV		 529 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
530 &__uss->ss_sp, label); \
531 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
532 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
c679a089
DB		 533} while (0);
534
f6dfb4fd 535/*
c679a089 536 * These syscall function prototypes are kept in the same order as
3e2052e5
DB		 537 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
538 * go below.
c679a089
DB		 539 *
540 * Please note that these prototypes here are only provided for information
541 * purposes, for static analysis, and for linking from the syscall table.
542 * These functions should not be called elsewhere from kernel code.
7303e30e
DB		 543 *
544 * As the syscall calling convention may be different from the default
545 * for architectures overriding the syscall calling convention, do not
546 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
f6dfb4fd 547 */
7303e30e 548#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
c679a089
DB		 549asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
550asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
551 u32 __user *iocb);
7a074e96
CH		 552asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
553 compat_long_t min_nr,
554 compat_long_t nr,
555 struct io_event __user *events,
9afc5eee 556 struct old_timespec32 __user *timeout,
7a074e96 557 const struct __compat_aio_sigset __user *usig);
7a35397f
DD		 558asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
559 compat_long_t min_nr,
560 compat_long_t nr,
561 struct io_event __user *events,
562 struct __kernel_timespec __user *timeout,
563 const struct __compat_aio_sigset __user *usig);
c679a089
DB		 564
565/* fs/cookies.c */
566asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
567
568/* fs/eventpoll.c */
f6dfb4fd 569asmlinkage long compat_sys_epoll_pwait(int epfd,
35280bd4 570 struct epoll_event __user *events,
f6dfb4fd
DL		 571 int maxevents, int timeout,
572 const compat_sigset_t __user *sigmask,
573 compat_size_t sigsetsize);
b0a0c261
WB		 574asmlinkage long compat_sys_epoll_pwait2(int epfd,
575 struct epoll_event __user *events,
576 int maxevents,
577 const struct __kernel_timespec __user *timeout,
578 const compat_sigset_t __user *sigmask,
579 compat_size_t sigsetsize);
f6dfb4fd 580
c679a089
DB		 581/* fs/fcntl.c */
582asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
583 compat_ulong_t arg);
584asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
585 compat_ulong_t arg);
97416ce8 586
c679a089
DB		 587/* fs/ioctl.c */
588asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
589 compat_ulong_t arg);
140ff8b0 590
c679a089 591/* fs/open.c */
be84cb43
CM		 592asmlinkage long compat_sys_statfs(const char __user *pathname,
593 struct compat_statfs __user *buf);
be84cb43
CM		 594asmlinkage long compat_sys_statfs64(const char __user *pathname,
595 compat_size_t sz,
596 struct compat_statfs64 __user *buf);
c679a089
DB		 597asmlinkage long compat_sys_fstatfs(unsigned int fd,
598 struct compat_statfs __user *buf);
be84cb43
CM		 599asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
600 struct compat_statfs64 __user *buf);
c679a089
DB		 601asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
602asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
603/* No generic prototype for truncate64, ftruncate64, fallocate */
604asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
605 int flags, umode_t mode);
606
607/* fs/readdir.c */
be84cb43
CM		 608asmlinkage long compat_sys_getdents(unsigned int fd,
609 struct compat_linux_dirent __user *dirent,
610 unsigned int count);
c679a089
DB		 611
612/* fs/read_write.c */
613asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
c679a089
DB		 614/* No generic prototype for pread64 and pwrite64 */
615asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
3523a9d4 616 const struct iovec __user *vec,
c679a089
DB		 617 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
618asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
3523a9d4 619 const struct iovec __user *vec,
c679a089
DB		 620 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
621#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
622asmlinkage long compat_sys_preadv64(unsigned long fd,
3523a9d4 623 const struct iovec __user *vec,
c679a089
DB		 624 unsigned long vlen, loff_t pos);
625#endif
626
627#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
628asmlinkage long compat_sys_pwritev64(unsigned long fd,
3523a9d4 629 const struct iovec __user *vec,
c679a089
DB		 630 unsigned long vlen, loff_t pos);
631#endif
632
633/* fs/sendfile.c */
634asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
635 compat_off_t __user *offset, compat_size_t count);
636asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
637 compat_loff_t __user *offset, compat_size_t count);
638
639/* fs/select.c */
8dabe724 640asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
be84cb43
CM		 641 compat_ulong_t __user *outp,
642 compat_ulong_t __user *exp,
9afc5eee 643 struct old_timespec32 __user *tsp,
be84cb43 644 void __user *sig);
e024707b
DD		 645asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
646 compat_ulong_t __user *outp,
647 compat_ulong_t __user *exp,
648 struct __kernel_timespec __user *tsp,
649 void __user *sig);
8dabe724 650asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
be84cb43 651 unsigned int nfds,
9afc5eee 652 struct old_timespec32 __user *tsp,
be84cb43
CM		 653 const compat_sigset_t __user *sigmask,
654 compat_size_t sigsetsize);
8bd27a30
DD		 655asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
656 unsigned int nfds,
657 struct __kernel_timespec __user *tsp,
658 const compat_sigset_t __user *sigmask,
659 compat_size_t sigsetsize);
c679a089
DB		 660
661/* fs/signalfd.c */
be84cb43
CM		 662asmlinkage long compat_sys_signalfd4(int ufd,
663 const compat_sigset_t __user *sigmask,
664 compat_size_t sigsetsize, int flags);
be84cb43 665
c679a089
DB		 666/* fs/stat.c */
667asmlinkage long compat_sys_newfstatat(unsigned int dfd,
668 const char __user *filename,
669 struct compat_stat __user *statbuf,
670 int flag);
671asmlinkage long compat_sys_newfstat(unsigned int fd,
672 struct compat_stat __user *statbuf);
673
674/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
675
c679a089
DB		 676/* kernel/exit.c */
677asmlinkage long compat_sys_waitid(int, compat_pid_t,
678 struct compat_siginfo __user *, int,
679 struct compat_rusage __user *);
680
681
682
683/* kernel/futex.c */
c679a089
DB		 684asmlinkage long
685compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
686 compat_size_t len);
687asmlinkage long
688compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
689 compat_size_t __user *len_ptr);
690
c679a089 691/* kernel/itimer.c */
be84cb43 692asmlinkage long compat_sys_getitimer(int which,
c1745f84 693 struct old_itimerval32 __user *it);
be84cb43 694asmlinkage long compat_sys_setitimer(int which,
c1745f84
AB		 695 struct old_itimerval32 __user *in,
696 struct old_itimerval32 __user *out);
c679a089
DB		 697
698/* kernel/kexec.c */
699asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
700 compat_ulong_t nr_segments,
701 struct compat_kexec_segment __user *,
702 compat_ulong_t flags);
703
704/* kernel/posix-timers.c */
be84cb43
CM		 705asmlinkage long compat_sys_timer_create(clockid_t which_clock,
706 struct compat_sigevent __user *timer_event_spec,
707 timer_t __user *created_timer_id);
c679a089
DB		 708
709/* kernel/ptrace.c */
710asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
711 compat_long_t addr, compat_long_t data);
712
713/* kernel/sched/core.c */
714asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
715 unsigned int len,
716 compat_ulong_t __user *user_mask_ptr);
717asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
718 unsigned int len,
719 compat_ulong_t __user *user_mask_ptr);
c679a089
DB		 720
721/* kernel/signal.c */
722asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
723 compat_stack_t __user *uoss_ptr);
be84cb43
CM		 724asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
725 compat_size_t sigsetsize);
08d32fe5 726#ifndef CONFIG_ODD_RT_SIGACTION
08d32fe5
AV		 727asmlinkage long compat_sys_rt_sigaction(int,
728 const struct compat_sigaction __user *,
729 struct compat_sigaction __user *,
730 compat_size_t);
731#endif
c679a089
DB		 732asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
733 compat_sigset_t __user *oset,
734 compat_size_t sigsetsize);
735asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
736 compat_size_t sigsetsize);
8dabe724 737asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
c679a089 738 struct compat_siginfo __user *uinfo,
9afc5eee 739 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
2367c4b5
AB		 740asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
741 struct compat_siginfo __user *uinfo,
742 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
75907d4d
AV		 743asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
744 struct compat_siginfo __user *uinfo);
c679a089
DB		 745/* No generic prototype for rt_sigreturn */
746
747/* kernel/sys.c */
748asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
749asmlinkage long compat_sys_getrlimit(unsigned int resource,
750 struct compat_rlimit __user *rlim);
751asmlinkage long compat_sys_setrlimit(unsigned int resource,
752 struct compat_rlimit __user *rlim);
753asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
754
755/* kernel/time.c */
9afc5eee 756asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
c679a089 757 struct timezone __user *tz);
9afc5eee 758asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
c679a089 759 struct timezone __user *tz);
c679a089
DB		 760
761/* kernel/timer.c */
be84cb43 762asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
c679a089
DB		 763
764/* ipc/mqueue.c */
be84cb43
CM		 765asmlinkage long compat_sys_mq_open(const char __user *u_name,
766 int oflag, compat_mode_t mode,
767 struct compat_mq_attr __user *u_attr);
c679a089
DB		 768asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
769 const struct compat_sigevent __user *u_notification);
770asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
771 const struct compat_mq_attr __user *u_mqstat,
772 struct compat_mq_attr __user *u_omqstat);
4c696ba7 773
c679a089
DB		 774/* ipc/msg.c */
775asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
776asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
777 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
778asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
779 compat_ssize_t msgsz, int msgflg);
c41d68a5 780
c679a089
DB		 781/* ipc/sem.c */
782asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
c679a089
DB		 783
784/* ipc/shm.c */
785asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
786asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
787
788/* net/socket.c */
789asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
790 unsigned flags, struct sockaddr __user *addr,
791 int __user *addrlen);
c679a089
DB		 792asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
793 unsigned flags);
794asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
795 unsigned int flags);
796
797/* mm/filemap.c: No generic prototype for readahead */
c41d68a5 798
c679a089
DB		 799/* security/keys/keyctl.c */
800asmlinkage long compat_sys_keyctl(u32 option,
801 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
802
803/* arch/example/kernel/sys_example.c */
804asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
805 const compat_uptr_t __user *envp);
806
807/* mm/fadvise.c: No generic prototype for fadvise64_64 */
808
809/* mm/, CONFIG_MMU only */
810asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
811 compat_ulong_t mode,
812 compat_ulong_t __user *nmask,
813 compat_ulong_t maxnode, compat_ulong_t flags);
814asmlinkage long compat_sys_get_mempolicy(int __user *policy,
815 compat_ulong_t __user *nmask,
816 compat_ulong_t maxnode,
817 compat_ulong_t addr,
818 compat_ulong_t flags);
819asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
820 compat_ulong_t maxnode);
821asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
822 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
823 const compat_ulong_t __user *new_nodes);
824asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
825 __u32 __user *pages,
826 const int __user *nodes,
827 int __user *status,
828 int flags);
829
830asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
831 compat_pid_t pid, int sig,
832 struct compat_siginfo __user *uinfo);
e11d4284
AB		 833asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
834 unsigned vlen, unsigned int flags,
835 struct __kernel_timespec __user *timeout);
8dabe724 836asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
c679a089 837 unsigned vlen, unsigned int flags,
9afc5eee 838 struct old_timespec32 __user *timeout);
c679a089
DB		 839asmlinkage long compat_sys_wait4(compat_pid_t pid,
840 compat_uint_t __user *stat_addr, int options,
841 struct compat_rusage __user *ru);
842asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
843 int, const char __user *);
844asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
845 struct file_handle __user *handle,
846 int flags);
c679a089
DB		 847asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
848 unsigned vlen, unsigned int flags);
c679a089
DB		 849asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
850 const compat_uptr_t __user *argv,
851 const compat_uptr_t __user *envp, int flags);
852asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
3523a9d4 853 const struct iovec __user *vec,
c679a089
DB		 854 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
855asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
3523a9d4 856 const struct iovec __user *vec,
c679a089
DB		 857 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
858#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
576d0703 859asmlinkage long compat_sys_preadv64v2(unsigned long fd,
3523a9d4 860 const struct iovec __user *vec,
c679a089
DB		 861 unsigned long vlen, loff_t pos, rwf_t flags);
862#endif
a67ba43d 863
c679a089
DB		 864#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
865asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
3523a9d4 866 const struct iovec __user *vec,
c679a089
DB		 867 unsigned long vlen, loff_t pos, rwf_t flags);
868#endif
869
870
c679a089
DB		 871/*
872 * Deprecated system calls which are still defined in
873 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
874 */
875
876/* __ARCH_WANT_SYSCALL_NO_AT */
877asmlinkage long compat_sys_open(const char __user *filename, int flags,
878 umode_t mode);
c679a089
DB		 879
880/* __ARCH_WANT_SYSCALL_NO_FLAGS */
881asmlinkage long compat_sys_signalfd(int ufd,
882 const compat_sigset_t __user *sigmask,
883 compat_size_t sigsetsize);
884
885/* __ARCH_WANT_SYSCALL_OFF_T */
886asmlinkage long compat_sys_newstat(const char __user *filename,
887 struct compat_stat __user *statbuf);
888asmlinkage long compat_sys_newlstat(const char __user *filename,
889 struct compat_stat __user *statbuf);
890
891/* __ARCH_WANT_SYSCALL_DEPRECATED */
c679a089
DB		 892asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
893 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
9afc5eee 894 struct old_timeval32 __user *tvp);
c679a089
DB		 895asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
896asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
897 unsigned flags);
c679a089
DB		 898
899/* obsolete: fs/readdir.c */
900asmlinkage long compat_sys_old_readdir(unsigned int fd,
901 struct compat_old_linux_dirent __user *,
902 unsigned int count);
903
904/* obsolete: fs/select.c */
905asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
906
907/* obsolete: ipc */
908asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
90268439 909
c679a089 910/* obsolete: kernel/signal.c */
e9fb8b7e
CM		 911#ifdef __ARCH_WANT_SYS_SIGPENDING
912asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
913#endif
914
915#ifdef __ARCH_WANT_SYS_SIGPROCMASK
916asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
917 compat_old_sigset_t __user *oset);
918#endif
c679a089
DB		 919#ifdef CONFIG_COMPAT_OLD_SIGACTION
920asmlinkage long compat_sys_sigaction(int sig,
921 const struct compat_old_sigaction __user *act,
922 struct compat_old_sigaction __user *oact);
923#endif
e9fb8b7e 924
c679a089
DB		 925/* obsolete: net/socket.c */
926asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
5180e3e2 927
7303e30e
DB		 928#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
929
cd19c364 930/**
9afc5eee 931 * ns_to_old_timeval32 - Compat version of ns_to_timeval
cd19c364
FW		 932 * @nsec: the nanoseconds value to be converted
933 *
9afc5eee 934 * Returns the old_timeval32 representation of the nsec parameter.
cd19c364 935 */
9afc5eee 936static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
cd19c364 937{
693737b6 938 struct __kernel_old_timeval tv;
9afc5eee 939 struct old_timeval32 ctv;
cd19c364 940
693737b6 941 tv = ns_to_kernel_old_timeval(nsec);
cd19c364
FW		 942 ctv.tv_sec = tv.tv_sec;
943 ctv.tv_usec = tv.tv_usec;
944
945 return ctv;
946}
947
9b54bf9d
MR		 948/*
949 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
950 * directly. Instead, use one of the functions which work equivalently, such
951 * as the kcompat_sys_xyzyyz() functions prototyped below.
952 */
953
954int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
955 struct compat_statfs64 __user * buf);
956int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
957 struct compat_statfs64 __user * buf);
958
1a33b18b
AB		 959#ifdef CONFIG_COMPAT
960
961/*
962 * For most but not all architectures, "am I in a compat syscall?" and
963 * "am I a compat task?" are the same question. For architectures on which
964 * they aren't the same question, arch code can override in_compat_syscall.
965 */
966#ifndef in_compat_syscall
967static inline bool in_compat_syscall(void) { return is_compat_task(); }
968#endif
969
cd19c364 970#else /* !CONFIG_COMPAT */
3c761ea0
LT		 971
972#define is_compat_task() (0)
a846446b
DS		 973/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
974#define in_compat_syscall in_compat_syscall
5180e3e2 975static inline bool in_compat_syscall(void) { return false; }
3c761ea0 976
1da177e4 977#endif /* CONFIG_COMPAT */
5180e3e2 978
527c4125
CH		 979/*
980 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
981 * types, and will need special compat treatment for that. Most architectures
982 * don't need that special handling even for compat syscalls.
983 */
984#ifndef compat_need_64bit_alignment_fixup
985#define compat_need_64bit_alignment_fixup() false
986#endif
987
202bf8d7
AB		 988/*
989 * A pointer passed in from user mode. This should not
990 * be used for syscall parameters, just declare them
991 * as pointers because the syscall entry code will have
992 * appropriately converted them already.
993 */
994#ifndef compat_ptr
995static inline void __user *compat_ptr(compat_uptr_t uptr)
996{
997 return (void __user *)(unsigned long)uptr;
998}
999#endif
1000
1001static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1002{
1003 return (u32)(unsigned long)uptr;
1004}
1005
1da177e4 1006#endif /* _LINUX_COMPAT_H */
Linux 6.x block layer and io_uring tree(s)