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mm: Don't pin ZERO_PAGE in pin_user_pages()
[linux-block.git] / include / linux / compat.h
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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
129typedef struct {
130 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
131} compat_sigset_t;
132
b772434b 133int set_compat_user_sigmask(const compat_sigset_t __user *umask,
ded653cc
DD		 134 size_t sigsetsize);
135
08d32fe5 136struct compat_sigaction {
2a148698 137#ifndef __ARCH_HAS_IRIX_SIGACTION
08d32fe5
AV		 138 compat_uptr_t sa_handler;
139 compat_ulong_t sa_flags;
140#else
2a148698 141 compat_uint_t sa_flags;
08d32fe5
AV		 142 compat_uptr_t sa_handler;
143#endif
144#ifdef __ARCH_HAS_SA_RESTORER
145 compat_uptr_t sa_restorer;
146#endif
147 compat_sigset_t sa_mask __packed;
148};
08d32fe5 149
b713da69
AV		 150typedef union compat_sigval {
151 compat_int_t sival_int;
152 compat_uptr_t sival_ptr;
153} compat_sigval_t;
154
155typedef struct compat_siginfo {
156 int si_signo;
157#ifndef __ARCH_HAS_SWAPPED_SIGINFO
158 int si_errno;
159 int si_code;
160#else
161 int si_code;
162 int si_errno;
163#endif
164
165 union {
166 int _pad[128/sizeof(int) - 3];
167
168 /* kill() */
169 struct {
170 compat_pid_t _pid; /* sender's pid */
171 __compat_uid32_t _uid; /* sender's uid */
172 } _kill;
173
174 /* POSIX.1b timers */
175 struct {
176 compat_timer_t _tid; /* timer id */
177 int _overrun; /* overrun count */
178 compat_sigval_t _sigval; /* same as below */
179 } _timer;
180
181 /* POSIX.1b signals */
182 struct {
183 compat_pid_t _pid; /* sender's pid */
184 __compat_uid32_t _uid; /* sender's uid */
185 compat_sigval_t _sigval;
186 } _rt;
187
188 /* SIGCHLD */
189 struct {
190 compat_pid_t _pid; /* which child */
191 __compat_uid32_t _uid; /* sender's uid */
192 int _status; /* exit code */
193 compat_clock_t _utime;
194 compat_clock_t _stime;
195 } _sigchld;
196
197#ifdef CONFIG_X86_X32_ABI
198 /* SIGCHLD (x32 version) */
199 struct {
200 compat_pid_t _pid; /* which child */
201 __compat_uid32_t _uid; /* sender's uid */
202 int _status; /* exit code */
203 compat_s64 _utime;
204 compat_s64 _stime;
205 } _sigchld_x32;
206#endif
207
208 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
209 struct {
210 compat_uptr_t _addr; /* faulting insn/memory ref. */
8420f719
EB		 211#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
212 sizeof(short) : __alignof__(compat_uptr_t))
b713da69 213 union {
add0b32e
EB		 214 /* used on alpha and sparc */
215 int _trapno; /* TRAP # which caused the signal */
b68a68d3
EB		 216 /*
217 * used when si_code=BUS_MCEERR_AR or
218 * used when si_code=BUS_MCEERR_AO
219 */
220 short int _addr_lsb; /* Valid LSB of the reported address. */
b713da69
AV		 221 /* used when si_code=SEGV_BNDERR */
222 struct {
8420f719 223 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
b713da69
AV		 224 compat_uptr_t _lower;
225 compat_uptr_t _upper;
226 } _addr_bnd;
227 /* used when si_code=SEGV_PKUERR */
b68a68d3 228 struct {
8420f719 229 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
b68a68d3
EB		 230 u32 _pkey;
231 } _addr_pkey;
fb6cc127 232 /* used when si_code=TRAP_PERF */
0683b531
EB		 233 struct {
234 compat_ulong_t _data;
235 u32 _type;
78ed93d7 236 u32 _flags;
0683b531 237 } _perf;
b713da69
AV		 238 };
239 } _sigfault;
240
241 /* SIGPOLL */
242 struct {
243 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
244 int _fd;
245 } _sigpoll;
246
247 struct {
248 compat_uptr_t _call_addr; /* calling user insn */
249 int _syscall; /* triggering system call number */
250 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
251 } _sigsys;
252 } _sifields;
253} compat_siginfo_t;
254
1da177e4
LT		 255struct compat_rlimit {
256 compat_ulong_t rlim_cur;
257 compat_ulong_t rlim_max;
258};
259
3ce0f237
CH		 260#ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED
261#define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed))
262#else
263#define __ARCH_COMPAT_FLOCK64_PACK
264#endif
265
266struct compat_flock {
267 short l_type;
268 short l_whence;
269 compat_off_t l_start;
270 compat_off_t l_len;
271#ifdef __ARCH_COMPAT_FLOCK_EXTRA_SYSID
272 __ARCH_COMPAT_FLOCK_EXTRA_SYSID
273#endif
274 compat_pid_t l_pid;
275#ifdef __ARCH_COMPAT_FLOCK_PAD
276 __ARCH_COMPAT_FLOCK_PAD
277#endif
278};
279
280struct compat_flock64 {
281 short l_type;
282 short l_whence;
283 compat_loff_t l_start;
284 compat_loff_t l_len;
285 compat_pid_t l_pid;
286#ifdef __ARCH_COMPAT_FLOCK64_PAD
287 __ARCH_COMPAT_FLOCK64_PAD
288#endif
289} __ARCH_COMPAT_FLOCK64_PACK;
290
1da177e4 291struct compat_rusage {
9afc5eee
AB		 292 struct old_timeval32 ru_utime;
293 struct old_timeval32 ru_stime;
1da177e4
LT		 294 compat_long_t ru_maxrss;
295 compat_long_t ru_ixrss;
296 compat_long_t ru_idrss;
297 compat_long_t ru_isrss;
298 compat_long_t ru_minflt;
299 compat_long_t ru_majflt;
300 compat_long_t ru_nswap;
301 compat_long_t ru_inblock;
302 compat_long_t ru_oublock;
303 compat_long_t ru_msgsnd;
304 compat_long_t ru_msgrcv;
305 compat_long_t ru_nsignals;
306 compat_long_t ru_nvcsw;
307 compat_long_t ru_nivcsw;
308};
309
4800a5bb
CM		 310extern int put_compat_rusage(const struct rusage *,
311 struct compat_rusage __user *);
1da177e4
LT		 312
313struct compat_siginfo;
7a074e96 314struct __compat_aio_sigset;
1da177e4 315
1da177e4
LT		 316struct compat_dirent {
317 u32 d_ino;
318 compat_off_t d_off;
319 u16 d_reclen;
320 char d_name[256];
321};
322
2b1c6bd7
CH		 323struct compat_ustat {
324 compat_daddr_t f_tfree;
325 compat_ino_t f_tinode;
326 char f_fname[6];
327 char f_fpack[6];
328};
329
1da177e4
LT		 330#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
331
332typedef struct compat_sigevent {
333 compat_sigval_t sigev_value;
334 compat_int_t sigev_signo;
335 compat_int_t sigev_notify;
336 union {
337 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
338 compat_int_t _tid;
339
340 struct {
341 compat_uptr_t _function;
342 compat_uptr_t _attribute;
343 } _sigev_thread;
344 } _sigev_un;
345} compat_sigevent_t;
346
2dceba14
AB		 347struct compat_ifmap {
348 compat_ulong_t mem_start;
349 compat_ulong_t mem_end;
350 unsigned short base_addr;
351 unsigned char irq;
352 unsigned char dma;
353 unsigned char port;
354};
355
4800a5bb 356struct compat_if_settings {
7a50a240
AB		 357 unsigned int type; /* Type of physical device or protocol */
358 unsigned int size; /* Size of the data allocated by the caller */
359 compat_uptr_t ifs_ifsu; /* union of pointers */
360};
361
2dceba14 362struct compat_ifreq {
7a50a240
AB		 363 union {
364 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
365 } ifr_ifrn;
366 union {
367 struct sockaddr ifru_addr;
368 struct sockaddr ifru_dstaddr;
369 struct sockaddr ifru_broadaddr;
370 struct sockaddr ifru_netmask;
371 struct sockaddr ifru_hwaddr;
372 short ifru_flags;
373 compat_int_t ifru_ivalue;
374 compat_int_t ifru_mtu;
375 struct compat_ifmap ifru_map;
376 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
2dceba14 377 char ifru_newname[IFNAMSIZ];
7a50a240
AB		 378 compat_caddr_t ifru_data;
379 struct compat_if_settings ifru_settings;
380 } ifr_ifru;
2dceba14
AB		 381};
382
383struct compat_ifconf {
4800a5bb
CM		 384 compat_int_t ifc_len; /* size of buffer */
385 compat_caddr_t ifcbuf;
2dceba14
AB		 386};
387
34f192c6
IM		 388struct compat_robust_list {
389 compat_uptr_t next;
390};
391
392struct compat_robust_list_head {
393 struct compat_robust_list list;
394 compat_long_t futex_offset;
395 compat_uptr_t list_op_pending;
396};
397
495dfbf7
AV		 398#ifdef CONFIG_COMPAT_OLD_SIGACTION
399struct compat_old_sigaction {
400 compat_uptr_t sa_handler;
401 compat_old_sigset_t sa_mask;
402 compat_ulong_t sa_flags;
403 compat_uptr_t sa_restorer;
404};
405#endif
406
f1c316a3
SM		 407struct compat_keyctl_kdf_params {
408 compat_uptr_t hashname;
409 compat_uptr_t otherinfo;
410 __u32 otherinfolen;
411 __u32 __spare[8];
412};
413
1a33b18b 414struct compat_stat;
be84cb43
CM		 415struct compat_statfs;
416struct compat_statfs64;
417struct compat_old_linux_dirent;
418struct compat_linux_dirent;
419struct linux_dirent64;
420struct compat_msghdr;
421struct compat_mmsghdr;
422struct compat_sysinfo;
423struct compat_sysctl_args;
424struct compat_kexec_segment;
425struct compat_mq_attr;
48b25c43 426struct compat_msgbuf;
be84cb43 427
c3b3f524
CH		 428void copy_siginfo_to_external32(struct compat_siginfo *to,
429 const struct kernel_siginfo *from);
430int copy_siginfo_from_user32(kernel_siginfo_t *to,
431 const struct compat_siginfo __user *from);
432int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
433 const kernel_siginfo_t *from);
434#ifndef copy_siginfo_to_user32
435#define copy_siginfo_to_user32 __copy_siginfo_to_user32
436#endif
1da177e4
LT		 437int get_compat_sigevent(struct sigevent *event,
438 const struct compat_sigevent __user *u_event);
439
3968cf62 440extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
fde9fc76
MR		 441
442/*
443 * Defined inline such that size can be compile time constant, which avoids
444 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
445 */
446static inline int
447put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
448 unsigned int size)
449{
450 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
1a33b18b 451#if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
fde9fc76
MR		 452 compat_sigset_t v;
453 switch (_NSIG_WORDS) {
454 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
df561f66 455 fallthrough;
fde9fc76 456 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
df561f66 457 fallthrough;
fde9fc76 458 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
df561f66 459 fallthrough;
fde9fc76
MR		 460 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
461 }
462 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
463#else
464 return copy_to_user(compat, set, size) ? -EFAULT : 0;
465#endif
466}
bebfa101 467
14026b94
CL		 468#ifdef CONFIG_CPU_BIG_ENDIAN
469#define unsafe_put_compat_sigset(compat, set, label) do { \
470 compat_sigset_t __user *__c = compat; \
471 const sigset_t *__s = set; \
472 \
473 switch (_NSIG_WORDS) { \
474 case 4: \
475 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
476 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
477 fallthrough; \
478 case 3: \
479 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
480 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
481 fallthrough; \
482 case 2: \
483 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
484 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
485 fallthrough; \
486 case 1: \
487 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
488 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
489 } \
490} while (0)
fb05121f
CL		 491
492#define unsafe_get_compat_sigset(set, compat, label) do { \
493 const compat_sigset_t __user *__c = compat; \
494 compat_sigset_word hi, lo; \
495 sigset_t *__s = set; \
496 \
497 switch (_NSIG_WORDS) { \
498 case 4: \
499 unsafe_get_user(lo, &__c->sig[7], label); \
500 unsafe_get_user(hi, &__c->sig[6], label); \
501 __s->sig[3] = hi | (((long)lo) << 32); \
502 fallthrough; \
503 case 3: \
504 unsafe_get_user(lo, &__c->sig[5], label); \
505 unsafe_get_user(hi, &__c->sig[4], label); \
506 __s->sig[2] = hi | (((long)lo) << 32); \
507 fallthrough; \
508 case 2: \
509 unsafe_get_user(lo, &__c->sig[3], label); \
510 unsafe_get_user(hi, &__c->sig[2], label); \
511 __s->sig[1] = hi | (((long)lo) << 32); \
512 fallthrough; \
513 case 1: \
514 unsafe_get_user(lo, &__c->sig[1], label); \
515 unsafe_get_user(hi, &__c->sig[0], label); \
516 __s->sig[0] = hi | (((long)lo) << 32); \
517 } \
518} while (0)
14026b94
CL		 519#else
520#define unsafe_put_compat_sigset(compat, set, label) do { \
521 compat_sigset_t __user *__c = compat; \
522 const sigset_t *__s = set; \
523 \
524 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
525} while (0)
fb05121f
CL		 526
527#define unsafe_get_compat_sigset(set, compat, label) do { \
528 const compat_sigset_t __user *__c = compat; \
529 sigset_t *__s = set; \
530 \
531 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
532} while (0)
14026b94
CL		 533#endif
534
032d82d9
RM		 535extern int compat_ptrace_request(struct task_struct *child,
536 compat_long_t request,
537 compat_ulong_t addr, compat_ulong_t data);
538
c269f196
RM		 539extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
540 compat_ulong_t addr, compat_ulong_t data);
c269f196 541
c679a089
DB		 542struct epoll_event; /* fortunately, this one is fixed-layout */
543
c679a089
DB		 544int compat_restore_altstack(const compat_stack_t __user *uss);
545int __compat_save_altstack(compat_stack_t __user *, unsigned long);
39f16c1c 546#define unsafe_compat_save_altstack(uss, sp, label) do { \
c679a089
DB		 547 compat_stack_t __user *__uss = uss; \
548 struct task_struct *t = current; \
39f16c1c
AV		 549 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
550 &__uss->ss_sp, label); \
551 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
552 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
c679a089
DB		 553} while (0);
554
f6dfb4fd 555/*
c679a089 556 * These syscall function prototypes are kept in the same order as
3e2052e5
DB		 557 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
558 * go below.
c679a089
DB		 559 *
560 * Please note that these prototypes here are only provided for information
561 * purposes, for static analysis, and for linking from the syscall table.
562 * These functions should not be called elsewhere from kernel code.
7303e30e
DB		 563 *
564 * As the syscall calling convention may be different from the default
565 * for architectures overriding the syscall calling convention, do not
566 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
f6dfb4fd 567 */
7303e30e 568#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
c679a089
DB		 569asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
570asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
571 u32 __user *iocb);
7a074e96
CH		 572asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
573 compat_long_t min_nr,
574 compat_long_t nr,
575 struct io_event __user *events,
9afc5eee 576 struct old_timespec32 __user *timeout,
7a074e96 577 const struct __compat_aio_sigset __user *usig);
7a35397f
DD		 578asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
579 compat_long_t min_nr,
580 compat_long_t nr,
581 struct io_event __user *events,
582 struct __kernel_timespec __user *timeout,
583 const struct __compat_aio_sigset __user *usig);
c679a089
DB		 584
585/* fs/cookies.c */
586asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
587
588/* fs/eventpoll.c */
f6dfb4fd 589asmlinkage long compat_sys_epoll_pwait(int epfd,
35280bd4 590 struct epoll_event __user *events,
f6dfb4fd
DL		 591 int maxevents, int timeout,
592 const compat_sigset_t __user *sigmask,
593 compat_size_t sigsetsize);
b0a0c261
WB		 594asmlinkage long compat_sys_epoll_pwait2(int epfd,
595 struct epoll_event __user *events,
596 int maxevents,
597 const struct __kernel_timespec __user *timeout,
598 const compat_sigset_t __user *sigmask,
599 compat_size_t sigsetsize);
f6dfb4fd 600
c679a089
DB		 601/* fs/fcntl.c */
602asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
603 compat_ulong_t arg);
604asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
605 compat_ulong_t arg);
97416ce8 606
c679a089
DB		 607/* fs/ioctl.c */
608asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
609 compat_ulong_t arg);
140ff8b0 610
c679a089 611/* fs/open.c */
be84cb43
CM		 612asmlinkage long compat_sys_statfs(const char __user *pathname,
613 struct compat_statfs __user *buf);
be84cb43
CM		 614asmlinkage long compat_sys_statfs64(const char __user *pathname,
615 compat_size_t sz,
616 struct compat_statfs64 __user *buf);
c679a089
DB		 617asmlinkage long compat_sys_fstatfs(unsigned int fd,
618 struct compat_statfs __user *buf);
be84cb43
CM		 619asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
620 struct compat_statfs64 __user *buf);
c679a089
DB		 621asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
622asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
623/* No generic prototype for truncate64, ftruncate64, fallocate */
624asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
625 int flags, umode_t mode);
626
627/* fs/readdir.c */
be84cb43
CM		 628asmlinkage long compat_sys_getdents(unsigned int fd,
629 struct compat_linux_dirent __user *dirent,
630 unsigned int count);
c679a089
DB		 631
632/* fs/read_write.c */
633asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
c679a089
DB		 634/* No generic prototype for pread64 and pwrite64 */
635asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
3523a9d4 636 const struct iovec __user *vec,
c679a089
DB		 637 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
638asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
3523a9d4 639 const struct iovec __user *vec,
c679a089
DB		 640 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
641#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
642asmlinkage long compat_sys_preadv64(unsigned long fd,
3523a9d4 643 const struct iovec __user *vec,
c679a089
DB		 644 unsigned long vlen, loff_t pos);
645#endif
646
647#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
648asmlinkage long compat_sys_pwritev64(unsigned long fd,
3523a9d4 649 const struct iovec __user *vec,
c679a089
DB		 650 unsigned long vlen, loff_t pos);
651#endif
652
653/* fs/sendfile.c */
654asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
655 compat_off_t __user *offset, compat_size_t count);
656asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
657 compat_loff_t __user *offset, compat_size_t count);
658
659/* fs/select.c */
8dabe724 660asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
be84cb43
CM		 661 compat_ulong_t __user *outp,
662 compat_ulong_t __user *exp,
9afc5eee 663 struct old_timespec32 __user *tsp,
be84cb43 664 void __user *sig);
e024707b
DD		 665asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
666 compat_ulong_t __user *outp,
667 compat_ulong_t __user *exp,
668 struct __kernel_timespec __user *tsp,
669 void __user *sig);
8dabe724 670asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
be84cb43 671 unsigned int nfds,
9afc5eee 672 struct old_timespec32 __user *tsp,
be84cb43
CM		 673 const compat_sigset_t __user *sigmask,
674 compat_size_t sigsetsize);
8bd27a30
DD		 675asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
676 unsigned int nfds,
677 struct __kernel_timespec __user *tsp,
678 const compat_sigset_t __user *sigmask,
679 compat_size_t sigsetsize);
c679a089
DB		 680
681/* fs/signalfd.c */
be84cb43
CM		 682asmlinkage long compat_sys_signalfd4(int ufd,
683 const compat_sigset_t __user *sigmask,
684 compat_size_t sigsetsize, int flags);
be84cb43 685
c679a089
DB		 686/* fs/stat.c */
687asmlinkage long compat_sys_newfstatat(unsigned int dfd,
688 const char __user *filename,
689 struct compat_stat __user *statbuf,
690 int flag);
691asmlinkage long compat_sys_newfstat(unsigned int fd,
692 struct compat_stat __user *statbuf);
693
694/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
695
c679a089
DB		 696/* kernel/exit.c */
697asmlinkage long compat_sys_waitid(int, compat_pid_t,
698 struct compat_siginfo __user *, int,
699 struct compat_rusage __user *);
700
701
702
703/* kernel/futex.c */
c679a089
DB		 704asmlinkage long
705compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
706 compat_size_t len);
707asmlinkage long
708compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
709 compat_size_t __user *len_ptr);
710
c679a089 711/* kernel/itimer.c */
be84cb43 712asmlinkage long compat_sys_getitimer(int which,
c1745f84 713 struct old_itimerval32 __user *it);
be84cb43 714asmlinkage long compat_sys_setitimer(int which,
c1745f84
AB		 715 struct old_itimerval32 __user *in,
716 struct old_itimerval32 __user *out);
c679a089
DB		 717
718/* kernel/kexec.c */
719asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
720 compat_ulong_t nr_segments,
721 struct compat_kexec_segment __user *,
722 compat_ulong_t flags);
723
724/* kernel/posix-timers.c */
be84cb43
CM		 725asmlinkage long compat_sys_timer_create(clockid_t which_clock,
726 struct compat_sigevent __user *timer_event_spec,
727 timer_t __user *created_timer_id);
c679a089
DB		 728
729/* kernel/ptrace.c */
730asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
731 compat_long_t addr, compat_long_t data);
732
733/* kernel/sched/core.c */
734asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
735 unsigned int len,
736 compat_ulong_t __user *user_mask_ptr);
737asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
738 unsigned int len,
739 compat_ulong_t __user *user_mask_ptr);
c679a089
DB		 740
741/* kernel/signal.c */
742asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
743 compat_stack_t __user *uoss_ptr);
be84cb43
CM		 744asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
745 compat_size_t sigsetsize);
08d32fe5 746#ifndef CONFIG_ODD_RT_SIGACTION
08d32fe5
AV		 747asmlinkage long compat_sys_rt_sigaction(int,
748 const struct compat_sigaction __user *,
749 struct compat_sigaction __user *,
750 compat_size_t);
751#endif
c679a089
DB		 752asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
753 compat_sigset_t __user *oset,
754 compat_size_t sigsetsize);
755asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
756 compat_size_t sigsetsize);
8dabe724 757asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
c679a089 758 struct compat_siginfo __user *uinfo,
9afc5eee 759 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
2367c4b5
AB		 760asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
761 struct compat_siginfo __user *uinfo,
762 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
75907d4d
AV		 763asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
764 struct compat_siginfo __user *uinfo);
c679a089
DB		 765/* No generic prototype for rt_sigreturn */
766
767/* kernel/sys.c */
768asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
769asmlinkage long compat_sys_getrlimit(unsigned int resource,
770 struct compat_rlimit __user *rlim);
771asmlinkage long compat_sys_setrlimit(unsigned int resource,
772 struct compat_rlimit __user *rlim);
773asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
774
775/* kernel/time.c */
9afc5eee 776asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
c679a089 777 struct timezone __user *tz);
9afc5eee 778asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
c679a089 779 struct timezone __user *tz);
c679a089
DB		 780
781/* kernel/timer.c */
be84cb43 782asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
c679a089
DB		 783
784/* ipc/mqueue.c */
be84cb43
CM		 785asmlinkage long compat_sys_mq_open(const char __user *u_name,
786 int oflag, compat_mode_t mode,
787 struct compat_mq_attr __user *u_attr);
c679a089
DB		 788asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
789 const struct compat_sigevent __user *u_notification);
790asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
791 const struct compat_mq_attr __user *u_mqstat,
792 struct compat_mq_attr __user *u_omqstat);
4c696ba7 793
c679a089
DB		 794/* ipc/msg.c */
795asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
796asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
797 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
798asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
799 compat_ssize_t msgsz, int msgflg);
c41d68a5 800
c679a089
DB		 801/* ipc/sem.c */
802asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
c679a089
DB		 803
804/* ipc/shm.c */
805asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
806asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
807
808/* net/socket.c */
809asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
810 unsigned flags, struct sockaddr __user *addr,
811 int __user *addrlen);
c679a089
DB		 812asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
813 unsigned flags);
814asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
815 unsigned int flags);
816
817/* mm/filemap.c: No generic prototype for readahead */
c41d68a5 818
c679a089
DB		 819/* security/keys/keyctl.c */
820asmlinkage long compat_sys_keyctl(u32 option,
821 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
822
823/* arch/example/kernel/sys_example.c */
824asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
825 const compat_uptr_t __user *envp);
826
827/* mm/fadvise.c: No generic prototype for fadvise64_64 */
828
829/* mm/, CONFIG_MMU only */
c679a089
DB		 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
59c10c52
GR		 928#ifdef __ARCH_WANT_COMPAT_TRUNCATE64
929asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));
930#endif
931
932#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64
933asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));
934#endif
935
936#ifdef __ARCH_WANT_COMPAT_FALLOCATE
937asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset),
938 compat_arg_u64(len));
939#endif
940
941#ifdef __ARCH_WANT_COMPAT_PREAD64
942asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count,
943 compat_arg_u64(pos));
944#endif
945
946#ifdef __ARCH_WANT_COMPAT_PWRITE64
947asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count,
948 compat_arg_u64(pos));
949#endif
950
951#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE
952asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos),
953 compat_arg_u64(nbytes), unsigned int flags);
954#endif
955
956#ifdef __ARCH_WANT_COMPAT_FADVISE64_64
957asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos),
958 compat_arg_u64(len), int advice);
959#endif
960
961#ifdef __ARCH_WANT_COMPAT_READAHEAD
962asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);
963#endif
964
7303e30e
DB		 965#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
966
cd19c364 967/**
9afc5eee 968 * ns_to_old_timeval32 - Compat version of ns_to_timeval
cd19c364
FW		 969 * @nsec: the nanoseconds value to be converted
970 *
9afc5eee 971 * Returns the old_timeval32 representation of the nsec parameter.
cd19c364 972 */
9afc5eee 973static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
cd19c364 974{
693737b6 975 struct __kernel_old_timeval tv;
9afc5eee 976 struct old_timeval32 ctv;
cd19c364 977
693737b6 978 tv = ns_to_kernel_old_timeval(nsec);
cd19c364
FW		 979 ctv.tv_sec = tv.tv_sec;
980 ctv.tv_usec = tv.tv_usec;
981
982 return ctv;
983}
984
9b54bf9d
MR		 985/*
986 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
987 * directly. Instead, use one of the functions which work equivalently, such
988 * as the kcompat_sys_xyzyyz() functions prototyped below.
989 */
990
991int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
992 struct compat_statfs64 __user * buf);
993int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
994 struct compat_statfs64 __user * buf);
995
1a33b18b
AB		 996#ifdef CONFIG_COMPAT
997
998/*
999 * For most but not all architectures, "am I in a compat syscall?" and
1000 * "am I a compat task?" are the same question. For architectures on which
1001 * they aren't the same question, arch code can override in_compat_syscall.
1002 */
1003#ifndef in_compat_syscall
1004static inline bool in_compat_syscall(void) { return is_compat_task(); }
1005#endif
1006
cd19c364 1007#else /* !CONFIG_COMPAT */
3c761ea0
LT		 1008
1009#define is_compat_task() (0)
a846446b
DS		 1010/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
1011#define in_compat_syscall in_compat_syscall
5180e3e2 1012static inline bool in_compat_syscall(void) { return false; }
3c761ea0 1013
1da177e4 1014#endif /* CONFIG_COMPAT */
5180e3e2 1015
e130242d
AB		 1016#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
1017
1018#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
1019
1020long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
1021 unsigned long bitmap_size);
1022long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
1023 unsigned long bitmap_size);
1024
527c4125
CH		 1025/*
1026 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
1027 * types, and will need special compat treatment for that. Most architectures
1028 * don't need that special handling even for compat syscalls.
1029 */
1030#ifndef compat_need_64bit_alignment_fixup
1031#define compat_need_64bit_alignment_fixup() false
1032#endif
1033
202bf8d7
AB		 1034/*
1035 * A pointer passed in from user mode. This should not
1036 * be used for syscall parameters, just declare them
1037 * as pointers because the syscall entry code will have
1038 * appropriately converted them already.
1039 */
1040#ifndef compat_ptr
1041static inline void __user *compat_ptr(compat_uptr_t uptr)
1042{
1043 return (void __user *)(unsigned long)uptr;
1044}
1045#endif
1046
1047static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1048{
1049 return (u32)(unsigned long)uptr;
1050}
1051
1da177e4 1052#endif /* _LINUX_COMPAT_H */
Linux 6.x block layer and io_uring tree(s)