Line data Source code
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 : #include <asm/siginfo.h>
24 : #include <asm/signal.h>
25 :
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 :
37 : #ifndef COMPAT_USE_64BIT_TIME
38 : #define COMPAT_USE_64BIT_TIME 0
39 : #endif
40 :
41 : #ifndef __SC_DELOUSE
42 : #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
43 : #endif
44 :
45 : #ifndef COMPAT_SYSCALL_DEFINE0
46 : #define COMPAT_SYSCALL_DEFINE0(name) \
47 : asmlinkage long compat_sys_##name(void); \
48 : ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
49 : asmlinkage long compat_sys_##name(void)
50 : #endif /* COMPAT_SYSCALL_DEFINE0 */
51 :
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 :
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 : */
70 : #ifndef COMPAT_SYSCALL_DEFINEx
71 : #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
72 : __diag_push(); \
73 : __diag_ignore(GCC, 8, "-Wattribute-alias", \
74 : "Type aliasing is used to sanitize syscall arguments");\
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 : { \
82 : long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
83 : __MAP(x,__SC_TEST,__VA_ARGS__); \
84 : return ret; \
85 : } \
86 : __diag_pop(); \
87 : static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
88 : #endif /* COMPAT_SYSCALL_DEFINEx */
89 :
90 : struct compat_iovec {
91 : compat_uptr_t iov_base;
92 : compat_size_t iov_len;
93 : };
94 :
95 : #ifndef compat_user_stack_pointer
96 : #define compat_user_stack_pointer() current_user_stack_pointer()
97 : #endif
98 : #ifndef compat_sigaltstack /* we'll need that for MIPS */
99 : typedef 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
105 : #ifndef COMPAT_MINSIGSTKSZ
106 : #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
107 : #endif
108 :
109 : #define compat_jiffies_to_clock_t(x) \
110 : (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
111 :
112 : typedef __compat_uid32_t compat_uid_t;
113 : typedef __compat_gid32_t compat_gid_t;
114 :
115 : struct compat_sel_arg_struct;
116 : struct rusage;
117 :
118 : struct old_itimerval32;
119 :
120 : struct 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 :
129 : #ifndef compat_sigset_t
130 : typedef struct {
131 : compat_sigset_word sig[_COMPAT_NSIG_WORDS];
132 : } compat_sigset_t;
133 : #endif
134 :
135 : int set_compat_user_sigmask(const compat_sigset_t __user *umask,
136 : size_t sigsetsize);
137 :
138 : struct compat_sigaction {
139 : #ifndef __ARCH_HAS_IRIX_SIGACTION
140 : compat_uptr_t sa_handler;
141 : compat_ulong_t sa_flags;
142 : #else
143 : compat_uint_t sa_flags;
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 : };
151 :
152 : typedef union compat_sigval {
153 : compat_int_t sival_int;
154 : compat_uptr_t sival_ptr;
155 : } compat_sigval_t;
156 :
157 : typedef 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. */
213 : #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
214 : sizeof(short) : __alignof__(compat_uptr_t))
215 : union {
216 : /* used on alpha and sparc */
217 : int _trapno; /* TRAP # which caused the signal */
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. */
223 : /* used when si_code=SEGV_BNDERR */
224 : struct {
225 : char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
226 : compat_uptr_t _lower;
227 : compat_uptr_t _upper;
228 : } _addr_bnd;
229 : /* used when si_code=SEGV_PKUERR */
230 : struct {
231 : char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
232 : u32 _pkey;
233 : } _addr_pkey;
234 : /* used when si_code=TRAP_PERF */
235 : struct {
236 : compat_ulong_t _data;
237 : u32 _type;
238 : } _perf;
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 :
256 : struct compat_rlimit {
257 : compat_ulong_t rlim_cur;
258 : compat_ulong_t rlim_max;
259 : };
260 :
261 : struct compat_rusage {
262 : struct old_timeval32 ru_utime;
263 : struct old_timeval32 ru_stime;
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 :
280 : extern int put_compat_rusage(const struct rusage *,
281 : struct compat_rusage __user *);
282 :
283 : struct compat_siginfo;
284 : struct __compat_aio_sigset;
285 :
286 : struct compat_dirent {
287 : u32 d_ino;
288 : compat_off_t d_off;
289 : u16 d_reclen;
290 : char d_name[256];
291 : };
292 :
293 : struct 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 :
300 : #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
301 :
302 : typedef 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 :
317 : struct 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 :
326 : struct compat_if_settings {
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 :
332 : struct compat_ifreq {
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 */
347 : char ifru_newname[IFNAMSIZ];
348 : compat_caddr_t ifru_data;
349 : struct compat_if_settings ifru_settings;
350 : } ifr_ifru;
351 : };
352 :
353 : struct compat_ifconf {
354 : compat_int_t ifc_len; /* size of buffer */
355 : compat_caddr_t ifcbuf;
356 : };
357 :
358 : struct compat_robust_list {
359 : compat_uptr_t next;
360 : };
361 :
362 : struct 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 :
368 : #ifdef CONFIG_COMPAT_OLD_SIGACTION
369 : struct 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 :
377 : struct compat_keyctl_kdf_params {
378 : compat_uptr_t hashname;
379 : compat_uptr_t otherinfo;
380 : __u32 otherinfolen;
381 : __u32 __spare[8];
382 : };
383 :
384 : struct compat_stat;
385 : struct compat_statfs;
386 : struct compat_statfs64;
387 : struct compat_old_linux_dirent;
388 : struct compat_linux_dirent;
389 : struct linux_dirent64;
390 : struct compat_msghdr;
391 : struct compat_mmsghdr;
392 : struct compat_sysinfo;
393 : struct compat_sysctl_args;
394 : struct compat_kexec_segment;
395 : struct compat_mq_attr;
396 : struct compat_msgbuf;
397 :
398 : void copy_siginfo_to_external32(struct compat_siginfo *to,
399 : const struct kernel_siginfo *from);
400 : int copy_siginfo_from_user32(kernel_siginfo_t *to,
401 : const struct compat_siginfo __user *from);
402 : int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
403 : const kernel_siginfo_t *from);
404 : #ifndef copy_siginfo_to_user32
405 : #define copy_siginfo_to_user32 __copy_siginfo_to_user32
406 : #endif
407 : int get_compat_sigevent(struct sigevent *event,
408 : const struct compat_sigevent __user *u_event);
409 :
410 : extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
411 :
412 : /*
413 : * Defined inline such that size can be compile time constant, which avoids
414 : * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
415 : */
416 : static inline int
417 : put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
418 : unsigned int size)
419 : {
420 : /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
421 : #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
422 : compat_sigset_t v;
423 : switch (_NSIG_WORDS) {
424 : case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
425 : fallthrough;
426 : case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
427 : fallthrough;
428 : case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
429 : fallthrough;
430 : case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
431 : }
432 : return copy_to_user(compat, &v, size) ? -EFAULT : 0;
433 : #else
434 : return copy_to_user(compat, set, size) ? -EFAULT : 0;
435 : #endif
436 : }
437 :
438 : #ifdef CONFIG_CPU_BIG_ENDIAN
439 : #define unsafe_put_compat_sigset(compat, set, label) do { \
440 : compat_sigset_t __user *__c = compat; \
441 : const sigset_t *__s = set; \
442 : \
443 : switch (_NSIG_WORDS) { \
444 : case 4: \
445 : unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
446 : unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
447 : fallthrough; \
448 : case 3: \
449 : unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
450 : unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
451 : fallthrough; \
452 : case 2: \
453 : unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
454 : unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
455 : fallthrough; \
456 : case 1: \
457 : unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
458 : unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
459 : } \
460 : } while (0)
461 :
462 : #define unsafe_get_compat_sigset(set, compat, label) do { \
463 : const compat_sigset_t __user *__c = compat; \
464 : compat_sigset_word hi, lo; \
465 : sigset_t *__s = set; \
466 : \
467 : switch (_NSIG_WORDS) { \
468 : case 4: \
469 : unsafe_get_user(lo, &__c->sig[7], label); \
470 : unsafe_get_user(hi, &__c->sig[6], label); \
471 : __s->sig[3] = hi | (((long)lo) << 32); \
472 : fallthrough; \
473 : case 3: \
474 : unsafe_get_user(lo, &__c->sig[5], label); \
475 : unsafe_get_user(hi, &__c->sig[4], label); \
476 : __s->sig[2] = hi | (((long)lo) << 32); \
477 : fallthrough; \
478 : case 2: \
479 : unsafe_get_user(lo, &__c->sig[3], label); \
480 : unsafe_get_user(hi, &__c->sig[2], label); \
481 : __s->sig[1] = hi | (((long)lo) << 32); \
482 : fallthrough; \
483 : case 1: \
484 : unsafe_get_user(lo, &__c->sig[1], label); \
485 : unsafe_get_user(hi, &__c->sig[0], label); \
486 : __s->sig[0] = hi | (((long)lo) << 32); \
487 : } \
488 : } while (0)
489 : #else
490 : #define unsafe_put_compat_sigset(compat, set, label) do { \
491 : compat_sigset_t __user *__c = compat; \
492 : const sigset_t *__s = set; \
493 : \
494 : unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
495 : } while (0)
496 :
497 : #define unsafe_get_compat_sigset(set, compat, label) do { \
498 : const compat_sigset_t __user *__c = compat; \
499 : sigset_t *__s = set; \
500 : \
501 : unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
502 : } while (0)
503 : #endif
504 :
505 : extern int compat_ptrace_request(struct task_struct *child,
506 : compat_long_t request,
507 : compat_ulong_t addr, compat_ulong_t data);
508 :
509 : extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
510 : compat_ulong_t addr, compat_ulong_t data);
511 :
512 : struct epoll_event; /* fortunately, this one is fixed-layout */
513 :
514 : int compat_restore_altstack(const compat_stack_t __user *uss);
515 : int __compat_save_altstack(compat_stack_t __user *, unsigned long);
516 : #define unsafe_compat_save_altstack(uss, sp, label) do { \
517 : compat_stack_t __user *__uss = uss; \
518 : struct task_struct *t = current; \
519 : unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
520 : &__uss->ss_sp, label); \
521 : unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
522 : unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
523 : } while (0);
524 :
525 : /*
526 : * These syscall function prototypes are kept in the same order as
527 : * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
528 : * go below.
529 : *
530 : * Please note that these prototypes here are only provided for information
531 : * purposes, for static analysis, and for linking from the syscall table.
532 : * These functions should not be called elsewhere from kernel code.
533 : *
534 : * As the syscall calling convention may be different from the default
535 : * for architectures overriding the syscall calling convention, do not
536 : * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
537 : */
538 : #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
539 : asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
540 : asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
541 : u32 __user *iocb);
542 : asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
543 : compat_long_t min_nr,
544 : compat_long_t nr,
545 : struct io_event __user *events,
546 : struct old_timespec32 __user *timeout,
547 : const struct __compat_aio_sigset __user *usig);
548 : asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
549 : compat_long_t min_nr,
550 : compat_long_t nr,
551 : struct io_event __user *events,
552 : struct __kernel_timespec __user *timeout,
553 : const struct __compat_aio_sigset __user *usig);
554 :
555 : /* fs/cookies.c */
556 : asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
557 :
558 : /* fs/eventpoll.c */
559 : asmlinkage long compat_sys_epoll_pwait(int epfd,
560 : struct epoll_event __user *events,
561 : int maxevents, int timeout,
562 : const compat_sigset_t __user *sigmask,
563 : compat_size_t sigsetsize);
564 : asmlinkage long compat_sys_epoll_pwait2(int epfd,
565 : struct epoll_event __user *events,
566 : int maxevents,
567 : const struct __kernel_timespec __user *timeout,
568 : const compat_sigset_t __user *sigmask,
569 : compat_size_t sigsetsize);
570 :
571 : /* fs/fcntl.c */
572 : asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
573 : compat_ulong_t arg);
574 : asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
575 : compat_ulong_t arg);
576 :
577 : /* fs/ioctl.c */
578 : asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
579 : compat_ulong_t arg);
580 :
581 : /* fs/open.c */
582 : asmlinkage long compat_sys_statfs(const char __user *pathname,
583 : struct compat_statfs __user *buf);
584 : asmlinkage long compat_sys_statfs64(const char __user *pathname,
585 : compat_size_t sz,
586 : struct compat_statfs64 __user *buf);
587 : asmlinkage long compat_sys_fstatfs(unsigned int fd,
588 : struct compat_statfs __user *buf);
589 : asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
590 : struct compat_statfs64 __user *buf);
591 : asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
592 : asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
593 : /* No generic prototype for truncate64, ftruncate64, fallocate */
594 : asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
595 : int flags, umode_t mode);
596 :
597 : /* fs/readdir.c */
598 : asmlinkage long compat_sys_getdents(unsigned int fd,
599 : struct compat_linux_dirent __user *dirent,
600 : unsigned int count);
601 :
602 : /* fs/read_write.c */
603 : asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
604 : /* No generic prototype for pread64 and pwrite64 */
605 : asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
606 : const struct iovec __user *vec,
607 : compat_ulong_t vlen, u32 pos_low, u32 pos_high);
608 : asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
609 : const struct iovec __user *vec,
610 : compat_ulong_t vlen, u32 pos_low, u32 pos_high);
611 : #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
612 : asmlinkage long compat_sys_preadv64(unsigned long fd,
613 : const struct iovec __user *vec,
614 : unsigned long vlen, loff_t pos);
615 : #endif
616 :
617 : #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
618 : asmlinkage long compat_sys_pwritev64(unsigned long fd,
619 : const struct iovec __user *vec,
620 : unsigned long vlen, loff_t pos);
621 : #endif
622 :
623 : /* fs/sendfile.c */
624 : asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
625 : compat_off_t __user *offset, compat_size_t count);
626 : asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
627 : compat_loff_t __user *offset, compat_size_t count);
628 :
629 : /* fs/select.c */
630 : asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
631 : compat_ulong_t __user *outp,
632 : compat_ulong_t __user *exp,
633 : struct old_timespec32 __user *tsp,
634 : void __user *sig);
635 : asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
636 : compat_ulong_t __user *outp,
637 : compat_ulong_t __user *exp,
638 : struct __kernel_timespec __user *tsp,
639 : void __user *sig);
640 : asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
641 : unsigned int nfds,
642 : struct old_timespec32 __user *tsp,
643 : const compat_sigset_t __user *sigmask,
644 : compat_size_t sigsetsize);
645 : asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
646 : unsigned int nfds,
647 : struct __kernel_timespec __user *tsp,
648 : const compat_sigset_t __user *sigmask,
649 : compat_size_t sigsetsize);
650 :
651 : /* fs/signalfd.c */
652 : asmlinkage long compat_sys_signalfd4(int ufd,
653 : const compat_sigset_t __user *sigmask,
654 : compat_size_t sigsetsize, int flags);
655 :
656 : /* fs/stat.c */
657 : asmlinkage long compat_sys_newfstatat(unsigned int dfd,
658 : const char __user *filename,
659 : struct compat_stat __user *statbuf,
660 : int flag);
661 : asmlinkage long compat_sys_newfstat(unsigned int fd,
662 : struct compat_stat __user *statbuf);
663 :
664 : /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
665 :
666 : /* kernel/exit.c */
667 : asmlinkage long compat_sys_waitid(int, compat_pid_t,
668 : struct compat_siginfo __user *, int,
669 : struct compat_rusage __user *);
670 :
671 :
672 :
673 : /* kernel/futex.c */
674 : asmlinkage long
675 : compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
676 : compat_size_t len);
677 : asmlinkage long
678 : compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
679 : compat_size_t __user *len_ptr);
680 :
681 : /* kernel/itimer.c */
682 : asmlinkage long compat_sys_getitimer(int which,
683 : struct old_itimerval32 __user *it);
684 : asmlinkage long compat_sys_setitimer(int which,
685 : struct old_itimerval32 __user *in,
686 : struct old_itimerval32 __user *out);
687 :
688 : /* kernel/kexec.c */
689 : asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
690 : compat_ulong_t nr_segments,
691 : struct compat_kexec_segment __user *,
692 : compat_ulong_t flags);
693 :
694 : /* kernel/posix-timers.c */
695 : asmlinkage long compat_sys_timer_create(clockid_t which_clock,
696 : struct compat_sigevent __user *timer_event_spec,
697 : timer_t __user *created_timer_id);
698 :
699 : /* kernel/ptrace.c */
700 : asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
701 : compat_long_t addr, compat_long_t data);
702 :
703 : /* kernel/sched/core.c */
704 : asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
705 : unsigned int len,
706 : compat_ulong_t __user *user_mask_ptr);
707 : asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
708 : unsigned int len,
709 : compat_ulong_t __user *user_mask_ptr);
710 :
711 : /* kernel/signal.c */
712 : asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
713 : compat_stack_t __user *uoss_ptr);
714 : asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
715 : compat_size_t sigsetsize);
716 : #ifndef CONFIG_ODD_RT_SIGACTION
717 : asmlinkage long compat_sys_rt_sigaction(int,
718 : const struct compat_sigaction __user *,
719 : struct compat_sigaction __user *,
720 : compat_size_t);
721 : #endif
722 : asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
723 : compat_sigset_t __user *oset,
724 : compat_size_t sigsetsize);
725 : asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
726 : compat_size_t sigsetsize);
727 : asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
728 : struct compat_siginfo __user *uinfo,
729 : struct old_timespec32 __user *uts, compat_size_t sigsetsize);
730 : asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
731 : struct compat_siginfo __user *uinfo,
732 : struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
733 : asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
734 : struct compat_siginfo __user *uinfo);
735 : /* No generic prototype for rt_sigreturn */
736 :
737 : /* kernel/sys.c */
738 : asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
739 : asmlinkage long compat_sys_getrlimit(unsigned int resource,
740 : struct compat_rlimit __user *rlim);
741 : asmlinkage long compat_sys_setrlimit(unsigned int resource,
742 : struct compat_rlimit __user *rlim);
743 : asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
744 :
745 : /* kernel/time.c */
746 : asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
747 : struct timezone __user *tz);
748 : asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
749 : struct timezone __user *tz);
750 :
751 : /* kernel/timer.c */
752 : asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
753 :
754 : /* ipc/mqueue.c */
755 : asmlinkage long compat_sys_mq_open(const char __user *u_name,
756 : int oflag, compat_mode_t mode,
757 : struct compat_mq_attr __user *u_attr);
758 : asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
759 : const struct compat_sigevent __user *u_notification);
760 : asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
761 : const struct compat_mq_attr __user *u_mqstat,
762 : struct compat_mq_attr __user *u_omqstat);
763 :
764 : /* ipc/msg.c */
765 : asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
766 : asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
767 : compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
768 : asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
769 : compat_ssize_t msgsz, int msgflg);
770 :
771 : /* ipc/sem.c */
772 : asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
773 :
774 : /* ipc/shm.c */
775 : asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
776 : asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
777 :
778 : /* net/socket.c */
779 : asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
780 : unsigned flags, struct sockaddr __user *addr,
781 : int __user *addrlen);
782 : asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
783 : unsigned flags);
784 : asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
785 : unsigned int flags);
786 :
787 : /* mm/filemap.c: No generic prototype for readahead */
788 :
789 : /* security/keys/keyctl.c */
790 : asmlinkage long compat_sys_keyctl(u32 option,
791 : u32 arg2, u32 arg3, u32 arg4, u32 arg5);
792 :
793 : /* arch/example/kernel/sys_example.c */
794 : asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
795 : const compat_uptr_t __user *envp);
796 :
797 : /* mm/fadvise.c: No generic prototype for fadvise64_64 */
798 :
799 : /* mm/, CONFIG_MMU only */
800 : asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
801 : compat_pid_t pid, int sig,
802 : struct compat_siginfo __user *uinfo);
803 : asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
804 : unsigned vlen, unsigned int flags,
805 : struct __kernel_timespec __user *timeout);
806 : asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
807 : unsigned vlen, unsigned int flags,
808 : struct old_timespec32 __user *timeout);
809 : asmlinkage long compat_sys_wait4(compat_pid_t pid,
810 : compat_uint_t __user *stat_addr, int options,
811 : struct compat_rusage __user *ru);
812 : asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
813 : int, const char __user *);
814 : asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
815 : struct file_handle __user *handle,
816 : int flags);
817 : asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
818 : unsigned vlen, unsigned int flags);
819 : asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
820 : const compat_uptr_t __user *argv,
821 : const compat_uptr_t __user *envp, int flags);
822 : asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
823 : const struct iovec __user *vec,
824 : compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
825 : asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
826 : const struct iovec __user *vec,
827 : compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
828 : #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
829 : asmlinkage long compat_sys_preadv64v2(unsigned long fd,
830 : const struct iovec __user *vec,
831 : unsigned long vlen, loff_t pos, rwf_t flags);
832 : #endif
833 :
834 : #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
835 : asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
836 : const struct iovec __user *vec,
837 : unsigned long vlen, loff_t pos, rwf_t flags);
838 : #endif
839 :
840 :
841 : /*
842 : * Deprecated system calls which are still defined in
843 : * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
844 : */
845 :
846 : /* __ARCH_WANT_SYSCALL_NO_AT */
847 : asmlinkage long compat_sys_open(const char __user *filename, int flags,
848 : umode_t mode);
849 :
850 : /* __ARCH_WANT_SYSCALL_NO_FLAGS */
851 : asmlinkage long compat_sys_signalfd(int ufd,
852 : const compat_sigset_t __user *sigmask,
853 : compat_size_t sigsetsize);
854 :
855 : /* __ARCH_WANT_SYSCALL_OFF_T */
856 : asmlinkage long compat_sys_newstat(const char __user *filename,
857 : struct compat_stat __user *statbuf);
858 : asmlinkage long compat_sys_newlstat(const char __user *filename,
859 : struct compat_stat __user *statbuf);
860 :
861 : /* __ARCH_WANT_SYSCALL_DEPRECATED */
862 : asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
863 : compat_ulong_t __user *outp, compat_ulong_t __user *exp,
864 : struct old_timeval32 __user *tvp);
865 : asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
866 : asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
867 : unsigned flags);
868 :
869 : /* obsolete: fs/readdir.c */
870 : asmlinkage long compat_sys_old_readdir(unsigned int fd,
871 : struct compat_old_linux_dirent __user *,
872 : unsigned int count);
873 :
874 : /* obsolete: fs/select.c */
875 : asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
876 :
877 : /* obsolete: ipc */
878 : asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
879 :
880 : /* obsolete: kernel/signal.c */
881 : #ifdef __ARCH_WANT_SYS_SIGPENDING
882 : asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
883 : #endif
884 :
885 : #ifdef __ARCH_WANT_SYS_SIGPROCMASK
886 : asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
887 : compat_old_sigset_t __user *oset);
888 : #endif
889 : #ifdef CONFIG_COMPAT_OLD_SIGACTION
890 : asmlinkage long compat_sys_sigaction(int sig,
891 : const struct compat_old_sigaction __user *act,
892 : struct compat_old_sigaction __user *oact);
893 : #endif
894 :
895 : /* obsolete: net/socket.c */
896 : asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
897 :
898 : #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
899 :
900 : /**
901 : * ns_to_old_timeval32 - Compat version of ns_to_timeval
902 : * @nsec: the nanoseconds value to be converted
903 : *
904 : * Returns the old_timeval32 representation of the nsec parameter.
905 : */
906 : static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
907 : {
908 : struct __kernel_old_timeval tv;
909 : struct old_timeval32 ctv;
910 :
911 : tv = ns_to_kernel_old_timeval(nsec);
912 : ctv.tv_sec = tv.tv_sec;
913 : ctv.tv_usec = tv.tv_usec;
914 :
915 : return ctv;
916 : }
917 :
918 : /*
919 : * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
920 : * directly. Instead, use one of the functions which work equivalently, such
921 : * as the kcompat_sys_xyzyyz() functions prototyped below.
922 : */
923 :
924 : int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
925 : struct compat_statfs64 __user * buf);
926 : int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
927 : struct compat_statfs64 __user * buf);
928 :
929 : #ifdef CONFIG_COMPAT
930 :
931 : /*
932 : * For most but not all architectures, "am I in a compat syscall?" and
933 : * "am I a compat task?" are the same question. For architectures on which
934 : * they aren't the same question, arch code can override in_compat_syscall.
935 : */
936 : #ifndef in_compat_syscall
937 : static inline bool in_compat_syscall(void) { return is_compat_task(); }
938 : #endif
939 :
940 : #else /* !CONFIG_COMPAT */
941 :
942 : #define is_compat_task() (0)
943 : /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
944 : #define in_compat_syscall in_compat_syscall
945 : static inline bool in_compat_syscall(void) { return false; }
946 :
947 : #endif /* CONFIG_COMPAT */
948 :
949 : #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
950 :
951 : #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
952 :
953 : long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
954 : unsigned long bitmap_size);
955 : long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
956 : unsigned long bitmap_size);
957 :
958 : /*
959 : * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
960 : * types, and will need special compat treatment for that. Most architectures
961 : * don't need that special handling even for compat syscalls.
962 : */
963 : #ifndef compat_need_64bit_alignment_fixup
964 : #define compat_need_64bit_alignment_fixup() false
965 : #endif
966 :
967 : /*
968 : * A pointer passed in from user mode. This should not
969 : * be used for syscall parameters, just declare them
970 : * as pointers because the syscall entry code will have
971 : * appropriately converted them already.
972 : */
973 : #ifndef compat_ptr
974 : static inline void __user *compat_ptr(compat_uptr_t uptr)
975 : {
976 0 : return (void __user *)(unsigned long)uptr;
977 : }
978 : #endif
979 :
980 : static inline compat_uptr_t ptr_to_compat(void __user *uptr)
981 : {
982 : return (u32)(unsigned long)uptr;
983 : }
984 :
985 : #endif /* _LINUX_COMPAT_H */
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