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Merge tag 'powerpc-5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[mirror_ubuntu-kernels.git] / include / linux / compat.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_COMPAT_H
3 #define _LINUX_COMPAT_H
4 /*
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
7 */
8
9 #include <linux/types.h>
10 #include <linux/time.h>
11
12 #include <linux/stat.h>
13 #include <linux/param.h> /* for HZ */
14 #include <linux/sem.h>
15 #include <linux/socket.h>
16 #include <linux/if.h>
17 #include <linux/fs.h>
18 #include <linux/aio_abi.h> /* for aio_context_t */
19 #include <linux/uaccess.h>
20 #include <linux/unistd.h>
21
22 #include <asm/compat.h>
23
24 #ifdef CONFIG_COMPAT
25 #include <asm/siginfo.h>
26 #include <asm/signal.h>
27 #endif
28
29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
30 /*
31 * It may be useful for an architecture to override the definitions of the
32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
33 * to use a different calling convention for syscalls. To allow for that,
34 + the prototypes for the compat_sys_*() functions below will *not* be included
35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
36 */
37 #include <asm/syscall_wrapper.h>
38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
39
40 #ifndef COMPAT_USE_64BIT_TIME
41 #define COMPAT_USE_64BIT_TIME 0
42 #endif
43
44 #ifndef __SC_DELOUSE
45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
46 #endif
47
48 #ifndef COMPAT_SYSCALL_DEFINE0
49 #define COMPAT_SYSCALL_DEFINE0(name) \
50 asmlinkage long compat_sys_##name(void); \
51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
52 asmlinkage long compat_sys_##name(void)
53 #endif /* COMPAT_SYSCALL_DEFINE0 */
54
55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
67
68 /*
69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
70 * sign-extends 32-bit ints to longs whenever needed. The actual work is
71 * done within __do_compat_sys_*().
72 */
73 #ifndef COMPAT_SYSCALL_DEFINEx
74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
75 __diag_push(); \
76 __diag_ignore(GCC, 8, "-Wattribute-alias", \
77 "Type aliasing is used to sanitize syscall arguments");\
78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
85 { \
86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
87 __MAP(x,__SC_TEST,__VA_ARGS__); \
88 return ret; \
89 } \
90 __diag_pop(); \
91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
92 #endif /* COMPAT_SYSCALL_DEFINEx */
93
94 struct compat_iovec {
95 compat_uptr_t iov_base;
96 compat_size_t iov_len;
97 };
98
99 #ifdef CONFIG_COMPAT
100
101 #ifndef compat_user_stack_pointer
102 #define compat_user_stack_pointer() current_user_stack_pointer()
103 #endif
104 #ifndef compat_sigaltstack /* we'll need that for MIPS */
105 typedef struct compat_sigaltstack {
106 compat_uptr_t ss_sp;
107 int ss_flags;
108 compat_size_t ss_size;
109 } compat_stack_t;
110 #endif
111 #ifndef COMPAT_MINSIGSTKSZ
112 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
113 #endif
114
115 #define compat_jiffies_to_clock_t(x) \
116 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
117
118 typedef __compat_uid32_t compat_uid_t;
119 typedef __compat_gid32_t compat_gid_t;
120
121 struct compat_sel_arg_struct;
122 struct rusage;
123
124 struct old_itimerval32;
125
126 struct compat_tms {
127 compat_clock_t tms_utime;
128 compat_clock_t tms_stime;
129 compat_clock_t tms_cutime;
130 compat_clock_t tms_cstime;
131 };
132
133 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
134
135 typedef struct {
136 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
137 } compat_sigset_t;
138
139 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
140 size_t sigsetsize);
141
142 struct compat_sigaction {
143 #ifndef __ARCH_HAS_IRIX_SIGACTION
144 compat_uptr_t sa_handler;
145 compat_ulong_t sa_flags;
146 #else
147 compat_uint_t sa_flags;
148 compat_uptr_t sa_handler;
149 #endif
150 #ifdef __ARCH_HAS_SA_RESTORER
151 compat_uptr_t sa_restorer;
152 #endif
153 compat_sigset_t sa_mask __packed;
154 };
155
156 typedef union compat_sigval {
157 compat_int_t sival_int;
158 compat_uptr_t sival_ptr;
159 } compat_sigval_t;
160
161 typedef struct compat_siginfo {
162 int si_signo;
163 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
164 int si_errno;
165 int si_code;
166 #else
167 int si_code;
168 int si_errno;
169 #endif
170
171 union {
172 int _pad[128/sizeof(int) - 3];
173
174 /* kill() */
175 struct {
176 compat_pid_t _pid; /* sender's pid */
177 __compat_uid32_t _uid; /* sender's uid */
178 } _kill;
179
180 /* POSIX.1b timers */
181 struct {
182 compat_timer_t _tid; /* timer id */
183 int _overrun; /* overrun count */
184 compat_sigval_t _sigval; /* same as below */
185 } _timer;
186
187 /* POSIX.1b signals */
188 struct {
189 compat_pid_t _pid; /* sender's pid */
190 __compat_uid32_t _uid; /* sender's uid */
191 compat_sigval_t _sigval;
192 } _rt;
193
194 /* SIGCHLD */
195 struct {
196 compat_pid_t _pid; /* which child */
197 __compat_uid32_t _uid; /* sender's uid */
198 int _status; /* exit code */
199 compat_clock_t _utime;
200 compat_clock_t _stime;
201 } _sigchld;
202
203 #ifdef CONFIG_X86_X32_ABI
204 /* SIGCHLD (x32 version) */
205 struct {
206 compat_pid_t _pid; /* which child */
207 __compat_uid32_t _uid; /* sender's uid */
208 int _status; /* exit code */
209 compat_s64 _utime;
210 compat_s64 _stime;
211 } _sigchld_x32;
212 #endif
213
214 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
215 struct {
216 compat_uptr_t _addr; /* faulting insn/memory ref. */
217 #ifdef __ARCH_SI_TRAPNO
218 int _trapno; /* TRAP # which caused the signal */
219 #endif
220 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
221 sizeof(short) : __alignof__(compat_uptr_t))
222 union {
223 /*
224 * used when si_code=BUS_MCEERR_AR or
225 * used when si_code=BUS_MCEERR_AO
226 */
227 short int _addr_lsb; /* Valid LSB of the reported address. */
228 /* used when si_code=SEGV_BNDERR */
229 struct {
230 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
231 compat_uptr_t _lower;
232 compat_uptr_t _upper;
233 } _addr_bnd;
234 /* used when si_code=SEGV_PKUERR */
235 struct {
236 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
237 u32 _pkey;
238 } _addr_pkey;
239 /* used when si_code=TRAP_PERF */
240 compat_ulong_t _perf;
241 };
242 } _sigfault;
243
244 /* SIGPOLL */
245 struct {
246 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
247 int _fd;
248 } _sigpoll;
249
250 struct {
251 compat_uptr_t _call_addr; /* calling user insn */
252 int _syscall; /* triggering system call number */
253 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
254 } _sigsys;
255 } _sifields;
256 } compat_siginfo_t;
257
258 struct compat_rlimit {
259 compat_ulong_t rlim_cur;
260 compat_ulong_t rlim_max;
261 };
262
263 struct compat_rusage {
264 struct old_timeval32 ru_utime;
265 struct old_timeval32 ru_stime;
266 compat_long_t ru_maxrss;
267 compat_long_t ru_ixrss;
268 compat_long_t ru_idrss;
269 compat_long_t ru_isrss;
270 compat_long_t ru_minflt;
271 compat_long_t ru_majflt;
272 compat_long_t ru_nswap;
273 compat_long_t ru_inblock;
274 compat_long_t ru_oublock;
275 compat_long_t ru_msgsnd;
276 compat_long_t ru_msgrcv;
277 compat_long_t ru_nsignals;
278 compat_long_t ru_nvcsw;
279 compat_long_t ru_nivcsw;
280 };
281
282 extern int put_compat_rusage(const struct rusage *,
283 struct compat_rusage __user *);
284
285 struct compat_siginfo;
286 struct __compat_aio_sigset;
287
288 struct compat_dirent {
289 u32 d_ino;
290 compat_off_t d_off;
291 u16 d_reclen;
292 char d_name[256];
293 };
294
295 struct compat_ustat {
296 compat_daddr_t f_tfree;
297 compat_ino_t f_tinode;
298 char f_fname[6];
299 char f_fpack[6];
300 };
301
302 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
303
304 typedef struct compat_sigevent {
305 compat_sigval_t sigev_value;
306 compat_int_t sigev_signo;
307 compat_int_t sigev_notify;
308 union {
309 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
310 compat_int_t _tid;
311
312 struct {
313 compat_uptr_t _function;
314 compat_uptr_t _attribute;
315 } _sigev_thread;
316 } _sigev_un;
317 } compat_sigevent_t;
318
319 struct compat_ifmap {
320 compat_ulong_t mem_start;
321 compat_ulong_t mem_end;
322 unsigned short base_addr;
323 unsigned char irq;
324 unsigned char dma;
325 unsigned char port;
326 };
327
328 struct compat_if_settings {
329 unsigned int type; /* Type of physical device or protocol */
330 unsigned int size; /* Size of the data allocated by the caller */
331 compat_uptr_t ifs_ifsu; /* union of pointers */
332 };
333
334 struct compat_ifreq {
335 union {
336 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
337 } ifr_ifrn;
338 union {
339 struct sockaddr ifru_addr;
340 struct sockaddr ifru_dstaddr;
341 struct sockaddr ifru_broadaddr;
342 struct sockaddr ifru_netmask;
343 struct sockaddr ifru_hwaddr;
344 short ifru_flags;
345 compat_int_t ifru_ivalue;
346 compat_int_t ifru_mtu;
347 struct compat_ifmap ifru_map;
348 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
349 char ifru_newname[IFNAMSIZ];
350 compat_caddr_t ifru_data;
351 struct compat_if_settings ifru_settings;
352 } ifr_ifru;
353 };
354
355 struct compat_ifconf {
356 compat_int_t ifc_len; /* size of buffer */
357 compat_caddr_t ifcbuf;
358 };
359
360 struct compat_robust_list {
361 compat_uptr_t next;
362 };
363
364 struct compat_robust_list_head {
365 struct compat_robust_list list;
366 compat_long_t futex_offset;
367 compat_uptr_t list_op_pending;
368 };
369
370 #ifdef CONFIG_COMPAT_OLD_SIGACTION
371 struct compat_old_sigaction {
372 compat_uptr_t sa_handler;
373 compat_old_sigset_t sa_mask;
374 compat_ulong_t sa_flags;
375 compat_uptr_t sa_restorer;
376 };
377 #endif
378
379 struct compat_keyctl_kdf_params {
380 compat_uptr_t hashname;
381 compat_uptr_t otherinfo;
382 __u32 otherinfolen;
383 __u32 __spare[8];
384 };
385
386 struct compat_statfs;
387 struct compat_statfs64;
388 struct compat_old_linux_dirent;
389 struct compat_linux_dirent;
390 struct linux_dirent64;
391 struct compat_msghdr;
392 struct compat_mmsghdr;
393 struct compat_sysinfo;
394 struct compat_sysctl_args;
395 struct compat_kexec_segment;
396 struct compat_mq_attr;
397 struct compat_msgbuf;
398
399 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
400
401 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
402
403 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
404 unsigned long bitmap_size);
405 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
406 unsigned long bitmap_size);
407 void copy_siginfo_to_external32(struct compat_siginfo *to,
408 const struct kernel_siginfo *from);
409 int copy_siginfo_from_user32(kernel_siginfo_t *to,
410 const struct compat_siginfo __user *from);
411 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
412 const kernel_siginfo_t *from);
413 #ifndef copy_siginfo_to_user32
414 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
415 #endif
416 int get_compat_sigevent(struct sigevent *event,
417 const struct compat_sigevent __user *u_event);
418
419 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
420
421 /*
422 * Defined inline such that size can be compile time constant, which avoids
423 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
424 */
425 static inline int
426 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
427 unsigned int size)
428 {
429 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
430 #ifdef __BIG_ENDIAN
431 compat_sigset_t v;
432 switch (_NSIG_WORDS) {
433 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
434 fallthrough;
435 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
436 fallthrough;
437 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
438 fallthrough;
439 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
440 }
441 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
442 #else
443 return copy_to_user(compat, set, size) ? -EFAULT : 0;
444 #endif
445 }
446
447 #ifdef CONFIG_CPU_BIG_ENDIAN
448 #define unsafe_put_compat_sigset(compat, set, label) do { \
449 compat_sigset_t __user *__c = compat; \
450 const sigset_t *__s = set; \
451 \
452 switch (_NSIG_WORDS) { \
453 case 4: \
454 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
455 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
456 fallthrough; \
457 case 3: \
458 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
459 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
460 fallthrough; \
461 case 2: \
462 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
463 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
464 fallthrough; \
465 case 1: \
466 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
467 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
468 } \
469 } while (0)
470
471 #define unsafe_get_compat_sigset(set, compat, label) do { \
472 const compat_sigset_t __user *__c = compat; \
473 compat_sigset_word hi, lo; \
474 sigset_t *__s = set; \
475 \
476 switch (_NSIG_WORDS) { \
477 case 4: \
478 unsafe_get_user(lo, &__c->sig[7], label); \
479 unsafe_get_user(hi, &__c->sig[6], label); \
480 __s->sig[3] = hi | (((long)lo) << 32); \
481 fallthrough; \
482 case 3: \
483 unsafe_get_user(lo, &__c->sig[5], label); \
484 unsafe_get_user(hi, &__c->sig[4], label); \
485 __s->sig[2] = hi | (((long)lo) << 32); \
486 fallthrough; \
487 case 2: \
488 unsafe_get_user(lo, &__c->sig[3], label); \
489 unsafe_get_user(hi, &__c->sig[2], label); \
490 __s->sig[1] = hi | (((long)lo) << 32); \
491 fallthrough; \
492 case 1: \
493 unsafe_get_user(lo, &__c->sig[1], label); \
494 unsafe_get_user(hi, &__c->sig[0], label); \
495 __s->sig[0] = hi | (((long)lo) << 32); \
496 } \
497 } while (0)
498 #else
499 #define unsafe_put_compat_sigset(compat, set, label) do { \
500 compat_sigset_t __user *__c = compat; \
501 const sigset_t *__s = set; \
502 \
503 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
504 } while (0)
505
506 #define unsafe_get_compat_sigset(set, compat, label) do { \
507 const compat_sigset_t __user *__c = compat; \
508 sigset_t *__s = set; \
509 \
510 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
511 } while (0)
512 #endif
513
514 extern int compat_ptrace_request(struct task_struct *child,
515 compat_long_t request,
516 compat_ulong_t addr, compat_ulong_t data);
517
518 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
519 compat_ulong_t addr, compat_ulong_t data);
520
521 struct epoll_event; /* fortunately, this one is fixed-layout */
522
523 extern void __user *compat_alloc_user_space(unsigned long len);
524
525 int compat_restore_altstack(const compat_stack_t __user *uss);
526 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
527 #define unsafe_compat_save_altstack(uss, sp, label) do { \
528 compat_stack_t __user *__uss = uss; \
529 struct task_struct *t = current; \
530 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
531 &__uss->ss_sp, label); \
532 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
533 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
534 if (t->sas_ss_flags & SS_AUTODISARM) \
535 sas_ss_reset(t); \
536 } while (0);
537
538 /*
539 * These syscall function prototypes are kept in the same order as
540 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
541 * go below.
542 *
543 * Please note that these prototypes here are only provided for information
544 * purposes, for static analysis, and for linking from the syscall table.
545 * These functions should not be called elsewhere from kernel code.
546 *
547 * As the syscall calling convention may be different from the default
548 * for architectures overriding the syscall calling convention, do not
549 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
550 */
551 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
552 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
553 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
554 u32 __user *iocb);
555 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
556 compat_long_t min_nr,
557 compat_long_t nr,
558 struct io_event __user *events,
559 struct old_timespec32 __user *timeout,
560 const struct __compat_aio_sigset __user *usig);
561 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
562 compat_long_t min_nr,
563 compat_long_t nr,
564 struct io_event __user *events,
565 struct __kernel_timespec __user *timeout,
566 const struct __compat_aio_sigset __user *usig);
567
568 /* fs/cookies.c */
569 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
570
571 /* fs/eventpoll.c */
572 asmlinkage long compat_sys_epoll_pwait(int epfd,
573 struct epoll_event __user *events,
574 int maxevents, int timeout,
575 const compat_sigset_t __user *sigmask,
576 compat_size_t sigsetsize);
577 asmlinkage long compat_sys_epoll_pwait2(int epfd,
578 struct epoll_event __user *events,
579 int maxevents,
580 const struct __kernel_timespec __user *timeout,
581 const compat_sigset_t __user *sigmask,
582 compat_size_t sigsetsize);
583
584 /* fs/fcntl.c */
585 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
586 compat_ulong_t arg);
587 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
588 compat_ulong_t arg);
589
590 /* fs/ioctl.c */
591 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
592 compat_ulong_t arg);
593
594 /* fs/open.c */
595 asmlinkage long compat_sys_statfs(const char __user *pathname,
596 struct compat_statfs __user *buf);
597 asmlinkage long compat_sys_statfs64(const char __user *pathname,
598 compat_size_t sz,
599 struct compat_statfs64 __user *buf);
600 asmlinkage long compat_sys_fstatfs(unsigned int fd,
601 struct compat_statfs __user *buf);
602 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
603 struct compat_statfs64 __user *buf);
604 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
605 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
606 /* No generic prototype for truncate64, ftruncate64, fallocate */
607 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
608 int flags, umode_t mode);
609
610 /* fs/readdir.c */
611 asmlinkage long compat_sys_getdents(unsigned int fd,
612 struct compat_linux_dirent __user *dirent,
613 unsigned int count);
614
615 /* fs/read_write.c */
616 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
617 /* No generic prototype for pread64 and pwrite64 */
618 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
619 const struct iovec __user *vec,
620 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
621 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
622 const struct iovec __user *vec,
623 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
624 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
625 asmlinkage long compat_sys_preadv64(unsigned long fd,
626 const struct iovec __user *vec,
627 unsigned long vlen, loff_t pos);
628 #endif
629
630 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
631 asmlinkage long compat_sys_pwritev64(unsigned long fd,
632 const struct iovec __user *vec,
633 unsigned long vlen, loff_t pos);
634 #endif
635
636 /* fs/sendfile.c */
637 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
638 compat_off_t __user *offset, compat_size_t count);
639 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
640 compat_loff_t __user *offset, compat_size_t count);
641
642 /* fs/select.c */
643 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
644 compat_ulong_t __user *outp,
645 compat_ulong_t __user *exp,
646 struct old_timespec32 __user *tsp,
647 void __user *sig);
648 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
649 compat_ulong_t __user *outp,
650 compat_ulong_t __user *exp,
651 struct __kernel_timespec __user *tsp,
652 void __user *sig);
653 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
654 unsigned int nfds,
655 struct old_timespec32 __user *tsp,
656 const compat_sigset_t __user *sigmask,
657 compat_size_t sigsetsize);
658 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
659 unsigned int nfds,
660 struct __kernel_timespec __user *tsp,
661 const compat_sigset_t __user *sigmask,
662 compat_size_t sigsetsize);
663
664 /* fs/signalfd.c */
665 asmlinkage long compat_sys_signalfd4(int ufd,
666 const compat_sigset_t __user *sigmask,
667 compat_size_t sigsetsize, int flags);
668
669 /* fs/stat.c */
670 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
671 const char __user *filename,
672 struct compat_stat __user *statbuf,
673 int flag);
674 asmlinkage long compat_sys_newfstat(unsigned int fd,
675 struct compat_stat __user *statbuf);
676
677 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
678
679 /* kernel/exit.c */
680 asmlinkage long compat_sys_waitid(int, compat_pid_t,
681 struct compat_siginfo __user *, int,
682 struct compat_rusage __user *);
683
684
685
686 /* kernel/futex.c */
687 asmlinkage long
688 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
689 compat_size_t len);
690 asmlinkage long
691 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
692 compat_size_t __user *len_ptr);
693
694 /* kernel/itimer.c */
695 asmlinkage long compat_sys_getitimer(int which,
696 struct old_itimerval32 __user *it);
697 asmlinkage long compat_sys_setitimer(int which,
698 struct old_itimerval32 __user *in,
699 struct old_itimerval32 __user *out);
700
701 /* kernel/kexec.c */
702 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
703 compat_ulong_t nr_segments,
704 struct compat_kexec_segment __user *,
705 compat_ulong_t flags);
706
707 /* kernel/posix-timers.c */
708 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
709 struct compat_sigevent __user *timer_event_spec,
710 timer_t __user *created_timer_id);
711
712 /* kernel/ptrace.c */
713 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
714 compat_long_t addr, compat_long_t data);
715
716 /* kernel/sched/core.c */
717 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
718 unsigned int len,
719 compat_ulong_t __user *user_mask_ptr);
720 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
721 unsigned int len,
722 compat_ulong_t __user *user_mask_ptr);
723
724 /* kernel/signal.c */
725 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
726 compat_stack_t __user *uoss_ptr);
727 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
728 compat_size_t sigsetsize);
729 #ifndef CONFIG_ODD_RT_SIGACTION
730 asmlinkage long compat_sys_rt_sigaction(int,
731 const struct compat_sigaction __user *,
732 struct compat_sigaction __user *,
733 compat_size_t);
734 #endif
735 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
736 compat_sigset_t __user *oset,
737 compat_size_t sigsetsize);
738 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
739 compat_size_t sigsetsize);
740 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
741 struct compat_siginfo __user *uinfo,
742 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
743 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
744 struct compat_siginfo __user *uinfo,
745 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
746 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
747 struct compat_siginfo __user *uinfo);
748 /* No generic prototype for rt_sigreturn */
749
750 /* kernel/sys.c */
751 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
752 asmlinkage long compat_sys_getrlimit(unsigned int resource,
753 struct compat_rlimit __user *rlim);
754 asmlinkage long compat_sys_setrlimit(unsigned int resource,
755 struct compat_rlimit __user *rlim);
756 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
757
758 /* kernel/time.c */
759 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
760 struct timezone __user *tz);
761 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
762 struct timezone __user *tz);
763
764 /* kernel/timer.c */
765 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
766
767 /* ipc/mqueue.c */
768 asmlinkage long compat_sys_mq_open(const char __user *u_name,
769 int oflag, compat_mode_t mode,
770 struct compat_mq_attr __user *u_attr);
771 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
772 const struct compat_sigevent __user *u_notification);
773 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
774 const struct compat_mq_attr __user *u_mqstat,
775 struct compat_mq_attr __user *u_omqstat);
776
777 /* ipc/msg.c */
778 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
779 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
780 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
781 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
782 compat_ssize_t msgsz, int msgflg);
783
784 /* ipc/sem.c */
785 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
786
787 /* ipc/shm.c */
788 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
789 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
790
791 /* net/socket.c */
792 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
793 unsigned flags, struct sockaddr __user *addr,
794 int __user *addrlen);
795 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
796 unsigned flags);
797 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
798 unsigned int flags);
799
800 /* mm/filemap.c: No generic prototype for readahead */
801
802 /* security/keys/keyctl.c */
803 asmlinkage long compat_sys_keyctl(u32 option,
804 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
805
806 /* arch/example/kernel/sys_example.c */
807 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
808 const compat_uptr_t __user *envp);
809
810 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
811
812 /* mm/, CONFIG_MMU only */
813 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
814 compat_ulong_t mode,
815 compat_ulong_t __user *nmask,
816 compat_ulong_t maxnode, compat_ulong_t flags);
817 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
818 compat_ulong_t __user *nmask,
819 compat_ulong_t maxnode,
820 compat_ulong_t addr,
821 compat_ulong_t flags);
822 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
823 compat_ulong_t maxnode);
824 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
825 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
826 const compat_ulong_t __user *new_nodes);
827 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
828 __u32 __user *pages,
829 const int __user *nodes,
830 int __user *status,
831 int flags);
832
833 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
834 compat_pid_t pid, int sig,
835 struct compat_siginfo __user *uinfo);
836 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
837 unsigned vlen, unsigned int flags,
838 struct __kernel_timespec __user *timeout);
839 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
840 unsigned vlen, unsigned int flags,
841 struct old_timespec32 __user *timeout);
842 asmlinkage long compat_sys_wait4(compat_pid_t pid,
843 compat_uint_t __user *stat_addr, int options,
844 struct compat_rusage __user *ru);
845 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
846 int, const char __user *);
847 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
848 struct file_handle __user *handle,
849 int flags);
850 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
851 unsigned vlen, unsigned int flags);
852 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
853 const compat_uptr_t __user *argv,
854 const compat_uptr_t __user *envp, int flags);
855 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
856 const struct iovec __user *vec,
857 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
858 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
859 const struct iovec __user *vec,
860 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
861 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
862 asmlinkage long compat_sys_preadv64v2(unsigned long fd,
863 const struct iovec __user *vec,
864 unsigned long vlen, loff_t pos, rwf_t flags);
865 #endif
866
867 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
868 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
869 const struct iovec __user *vec,
870 unsigned long vlen, loff_t pos, rwf_t flags);
871 #endif
872
873
874 /*
875 * Deprecated system calls which are still defined in
876 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
877 */
878
879 /* __ARCH_WANT_SYSCALL_NO_AT */
880 asmlinkage long compat_sys_open(const char __user *filename, int flags,
881 umode_t mode);
882
883 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
884 asmlinkage long compat_sys_signalfd(int ufd,
885 const compat_sigset_t __user *sigmask,
886 compat_size_t sigsetsize);
887
888 /* __ARCH_WANT_SYSCALL_OFF_T */
889 asmlinkage long compat_sys_newstat(const char __user *filename,
890 struct compat_stat __user *statbuf);
891 asmlinkage long compat_sys_newlstat(const char __user *filename,
892 struct compat_stat __user *statbuf);
893
894 /* __ARCH_WANT_SYSCALL_DEPRECATED */
895 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
896 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
897 struct old_timeval32 __user *tvp);
898 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
899 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
900 unsigned flags);
901
902 /* obsolete: fs/readdir.c */
903 asmlinkage long compat_sys_old_readdir(unsigned int fd,
904 struct compat_old_linux_dirent __user *,
905 unsigned int count);
906
907 /* obsolete: fs/select.c */
908 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
909
910 /* obsolete: ipc */
911 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
912
913 /* obsolete: kernel/signal.c */
914 #ifdef __ARCH_WANT_SYS_SIGPENDING
915 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
916 #endif
917
918 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
919 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
920 compat_old_sigset_t __user *oset);
921 #endif
922 #ifdef CONFIG_COMPAT_OLD_SIGACTION
923 asmlinkage long compat_sys_sigaction(int sig,
924 const struct compat_old_sigaction __user *act,
925 struct compat_old_sigaction __user *oact);
926 #endif
927
928 /* obsolete: net/socket.c */
929 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
930
931 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
932
933
934 /*
935 * For most but not all architectures, "am I in a compat syscall?" and
936 * "am I a compat task?" are the same question. For architectures on which
937 * they aren't the same question, arch code can override in_compat_syscall.
938 */
939
940 #ifndef in_compat_syscall
941 static inline bool in_compat_syscall(void) { return is_compat_task(); }
942 #endif
943
944 /**
945 * ns_to_old_timeval32 - Compat version of ns_to_timeval
946 * @nsec: the nanoseconds value to be converted
947 *
948 * Returns the old_timeval32 representation of the nsec parameter.
949 */
950 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
951 {
952 struct __kernel_old_timeval tv;
953 struct old_timeval32 ctv;
954
955 tv = ns_to_kernel_old_timeval(nsec);
956 ctv.tv_sec = tv.tv_sec;
957 ctv.tv_usec = tv.tv_usec;
958
959 return ctv;
960 }
961
962 /*
963 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
964 * directly. Instead, use one of the functions which work equivalently, such
965 * as the kcompat_sys_xyzyyz() functions prototyped below.
966 */
967
968 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
969 struct compat_statfs64 __user * buf);
970 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
971 struct compat_statfs64 __user * buf);
972
973 #else /* !CONFIG_COMPAT */
974
975 #define is_compat_task() (0)
976 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
977 #define in_compat_syscall in_compat_syscall
978 static inline bool in_compat_syscall(void) { return false; }
979
980 #endif /* CONFIG_COMPAT */
981
982 /*
983 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
984 * types, and will need special compat treatment for that. Most architectures
985 * don't need that special handling even for compat syscalls.
986 */
987 #ifndef compat_need_64bit_alignment_fixup
988 #define compat_need_64bit_alignment_fixup() false
989 #endif
990
991 /*
992 * A pointer passed in from user mode. This should not
993 * be used for syscall parameters, just declare them
994 * as pointers because the syscall entry code will have
995 * appropriately converted them already.
996 */
997 #ifndef compat_ptr
998 static inline void __user *compat_ptr(compat_uptr_t uptr)
999 {
1000 return (void __user *)(unsigned long)uptr;
1001 }
1002 #endif
1003
1004 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1005 {
1006 return (u32)(unsigned long)uptr;
1007 }
1008
1009 #endif /* _LINUX_COMPAT_H */
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