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 : typedef struct {
130 : compat_sigset_word sig[_COMPAT_NSIG_WORDS];
131 : } compat_sigset_t;
132 :
133 : int set_compat_user_sigmask(const compat_sigset_t __user *umask,
134 : size_t sigsetsize);
135 :
136 : struct compat_sigaction {
137 : #ifndef __ARCH_HAS_IRIX_SIGACTION
138 : compat_uptr_t sa_handler;
139 : compat_ulong_t sa_flags;
140 : #else
141 : compat_uint_t sa_flags;
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 : };
149 :
150 : typedef union compat_sigval {
151 : compat_int_t sival_int;
152 : compat_uptr_t sival_ptr;
153 : } compat_sigval_t;
154 :
155 : typedef 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. */
211 : #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
212 : sizeof(short) : __alignof__(compat_uptr_t))
213 : union {
214 : /* used on alpha and sparc */
215 : int _trapno; /* TRAP # which caused the signal */
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. */
221 : /* used when si_code=SEGV_BNDERR */
222 : struct {
223 : char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
224 : compat_uptr_t _lower;
225 : compat_uptr_t _upper;
226 : } _addr_bnd;
227 : /* used when si_code=SEGV_PKUERR */
228 : struct {
229 : char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
230 : u32 _pkey;
231 : } _addr_pkey;
232 : /* used when si_code=TRAP_PERF */
233 : struct {
234 : compat_ulong_t _data;
235 : u32 _type;
236 : u32 _flags;
237 : } _perf;
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 :
255 : struct compat_rlimit {
256 : compat_ulong_t rlim_cur;
257 : compat_ulong_t rlim_max;
258 : };
259 :
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 :
266 : struct 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 :
280 : struct 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 :
291 : struct compat_rusage {
292 : struct old_timeval32 ru_utime;
293 : struct old_timeval32 ru_stime;
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 :
310 : extern int put_compat_rusage(const struct rusage *,
311 : struct compat_rusage __user *);
312 :
313 : struct compat_siginfo;
314 : struct __compat_aio_sigset;
315 :
316 : struct compat_dirent {
317 : u32 d_ino;
318 : compat_off_t d_off;
319 : u16 d_reclen;
320 : char d_name[256];
321 : };
322 :
323 : struct 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 :
330 : #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
331 :
332 : typedef 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 :
347 : struct 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 :
356 : struct compat_if_settings {
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 :
362 : struct compat_ifreq {
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 */
377 : char ifru_newname[IFNAMSIZ];
378 : compat_caddr_t ifru_data;
379 : struct compat_if_settings ifru_settings;
380 : } ifr_ifru;
381 : };
382 :
383 : struct compat_ifconf {
384 : compat_int_t ifc_len; /* size of buffer */
385 : compat_caddr_t ifcbuf;
386 : };
387 :
388 : struct compat_robust_list {
389 : compat_uptr_t next;
390 : };
391 :
392 : struct 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 :
398 : #ifdef CONFIG_COMPAT_OLD_SIGACTION
399 : struct 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 :
407 : struct compat_keyctl_kdf_params {
408 : compat_uptr_t hashname;
409 : compat_uptr_t otherinfo;
410 : __u32 otherinfolen;
411 : __u32 __spare[8];
412 : };
413 :
414 : struct compat_stat;
415 : struct compat_statfs;
416 : struct compat_statfs64;
417 : struct compat_old_linux_dirent;
418 : struct compat_linux_dirent;
419 : struct linux_dirent64;
420 : struct compat_msghdr;
421 : struct compat_mmsghdr;
422 : struct compat_sysinfo;
423 : struct compat_sysctl_args;
424 : struct compat_kexec_segment;
425 : struct compat_mq_attr;
426 : struct compat_msgbuf;
427 :
428 : void copy_siginfo_to_external32(struct compat_siginfo *to,
429 : const struct kernel_siginfo *from);
430 : int copy_siginfo_from_user32(kernel_siginfo_t *to,
431 : const struct compat_siginfo __user *from);
432 : int __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
437 : int get_compat_sigevent(struct sigevent *event,
438 : const struct compat_sigevent __user *u_event);
439 :
440 : extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
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 : */
446 : static inline int
447 : put_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) */
451 : #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
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];
455 : fallthrough;
456 : case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
457 : fallthrough;
458 : case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
459 : fallthrough;
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 : }
467 :
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)
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)
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)
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)
533 : #endif
534 :
535 : extern int compat_ptrace_request(struct task_struct *child,
536 : compat_long_t request,
537 : compat_ulong_t addr, compat_ulong_t data);
538 :
539 : extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
540 : compat_ulong_t addr, compat_ulong_t data);
541 :
542 : struct epoll_event; /* fortunately, this one is fixed-layout */
543 :
544 : int compat_restore_altstack(const compat_stack_t __user *uss);
545 : int __compat_save_altstack(compat_stack_t __user *, unsigned long);
546 : #define unsafe_compat_save_altstack(uss, sp, label) do { \
547 : compat_stack_t __user *__uss = uss; \
548 : struct task_struct *t = current; \
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); \
553 : } while (0);
554 :
555 : /*
556 : * These syscall function prototypes are kept in the same order as
557 : * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
558 : * go below.
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.
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.
567 : */
568 : #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
569 : asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
570 : asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
571 : u32 __user *iocb);
572 : asmlinkage 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,
576 : struct old_timespec32 __user *timeout,
577 : const struct __compat_aio_sigset __user *usig);
578 : asmlinkage 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);
584 :
585 : /* fs/cookies.c */
586 : asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
587 :
588 : /* fs/eventpoll.c */
589 : asmlinkage long compat_sys_epoll_pwait(int epfd,
590 : struct epoll_event __user *events,
591 : int maxevents, int timeout,
592 : const compat_sigset_t __user *sigmask,
593 : compat_size_t sigsetsize);
594 : asmlinkage 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);
600 :
601 : /* fs/fcntl.c */
602 : asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
603 : compat_ulong_t arg);
604 : asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
605 : compat_ulong_t arg);
606 :
607 : /* fs/ioctl.c */
608 : asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
609 : compat_ulong_t arg);
610 :
611 : /* fs/open.c */
612 : asmlinkage long compat_sys_statfs(const char __user *pathname,
613 : struct compat_statfs __user *buf);
614 : asmlinkage long compat_sys_statfs64(const char __user *pathname,
615 : compat_size_t sz,
616 : struct compat_statfs64 __user *buf);
617 : asmlinkage long compat_sys_fstatfs(unsigned int fd,
618 : struct compat_statfs __user *buf);
619 : asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
620 : struct compat_statfs64 __user *buf);
621 : asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
622 : asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
623 : /* No generic prototype for truncate64, ftruncate64, fallocate */
624 : asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
625 : int flags, umode_t mode);
626 :
627 : /* fs/readdir.c */
628 : asmlinkage long compat_sys_getdents(unsigned int fd,
629 : struct compat_linux_dirent __user *dirent,
630 : unsigned int count);
631 :
632 : /* fs/read_write.c */
633 : asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
634 : /* No generic prototype for pread64 and pwrite64 */
635 : asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
636 : const struct iovec __user *vec,
637 : compat_ulong_t vlen, u32 pos_low, u32 pos_high);
638 : asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
639 : const struct iovec __user *vec,
640 : compat_ulong_t vlen, u32 pos_low, u32 pos_high);
641 : #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
642 : asmlinkage long compat_sys_preadv64(unsigned long fd,
643 : const struct iovec __user *vec,
644 : unsigned long vlen, loff_t pos);
645 : #endif
646 :
647 : #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
648 : asmlinkage long compat_sys_pwritev64(unsigned long fd,
649 : const struct iovec __user *vec,
650 : unsigned long vlen, loff_t pos);
651 : #endif
652 :
653 : /* fs/sendfile.c */
654 : asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
655 : compat_off_t __user *offset, compat_size_t count);
656 : asmlinkage 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 */
660 : asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
661 : compat_ulong_t __user *outp,
662 : compat_ulong_t __user *exp,
663 : struct old_timespec32 __user *tsp,
664 : void __user *sig);
665 : asmlinkage 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);
670 : asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
671 : unsigned int nfds,
672 : struct old_timespec32 __user *tsp,
673 : const compat_sigset_t __user *sigmask,
674 : compat_size_t sigsetsize);
675 : asmlinkage 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);
680 :
681 : /* fs/signalfd.c */
682 : asmlinkage long compat_sys_signalfd4(int ufd,
683 : const compat_sigset_t __user *sigmask,
684 : compat_size_t sigsetsize, int flags);
685 :
686 : /* fs/stat.c */
687 : asmlinkage long compat_sys_newfstatat(unsigned int dfd,
688 : const char __user *filename,
689 : struct compat_stat __user *statbuf,
690 : int flag);
691 : asmlinkage 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 :
696 : /* kernel/exit.c */
697 : asmlinkage 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 */
704 : asmlinkage long
705 : compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
706 : compat_size_t len);
707 : asmlinkage long
708 : compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
709 : compat_size_t __user *len_ptr);
710 :
711 : /* kernel/itimer.c */
712 : asmlinkage long compat_sys_getitimer(int which,
713 : struct old_itimerval32 __user *it);
714 : asmlinkage long compat_sys_setitimer(int which,
715 : struct old_itimerval32 __user *in,
716 : struct old_itimerval32 __user *out);
717 :
718 : /* kernel/kexec.c */
719 : asmlinkage 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 */
725 : asmlinkage long compat_sys_timer_create(clockid_t which_clock,
726 : struct compat_sigevent __user *timer_event_spec,
727 : timer_t __user *created_timer_id);
728 :
729 : /* kernel/ptrace.c */
730 : asmlinkage 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 */
734 : asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
735 : unsigned int len,
736 : compat_ulong_t __user *user_mask_ptr);
737 : asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
738 : unsigned int len,
739 : compat_ulong_t __user *user_mask_ptr);
740 :
741 : /* kernel/signal.c */
742 : asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
743 : compat_stack_t __user *uoss_ptr);
744 : asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
745 : compat_size_t sigsetsize);
746 : #ifndef CONFIG_ODD_RT_SIGACTION
747 : asmlinkage long compat_sys_rt_sigaction(int,
748 : const struct compat_sigaction __user *,
749 : struct compat_sigaction __user *,
750 : compat_size_t);
751 : #endif
752 : asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
753 : compat_sigset_t __user *oset,
754 : compat_size_t sigsetsize);
755 : asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
756 : compat_size_t sigsetsize);
757 : asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
758 : struct compat_siginfo __user *uinfo,
759 : struct old_timespec32 __user *uts, compat_size_t sigsetsize);
760 : asmlinkage 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);
763 : asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
764 : struct compat_siginfo __user *uinfo);
765 : /* No generic prototype for rt_sigreturn */
766 :
767 : /* kernel/sys.c */
768 : asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
769 : asmlinkage long compat_sys_getrlimit(unsigned int resource,
770 : struct compat_rlimit __user *rlim);
771 : asmlinkage long compat_sys_setrlimit(unsigned int resource,
772 : struct compat_rlimit __user *rlim);
773 : asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
774 :
775 : /* kernel/time.c */
776 : asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
777 : struct timezone __user *tz);
778 : asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
779 : struct timezone __user *tz);
780 :
781 : /* kernel/timer.c */
782 : asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
783 :
784 : /* ipc/mqueue.c */
785 : asmlinkage 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);
788 : asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
789 : const struct compat_sigevent __user *u_notification);
790 : asmlinkage 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);
793 :
794 : /* ipc/msg.c */
795 : asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
796 : asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
797 : compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
798 : asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
799 : compat_ssize_t msgsz, int msgflg);
800 :
801 : /* ipc/sem.c */
802 : asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
803 :
804 : /* ipc/shm.c */
805 : asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
806 : asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
807 :
808 : /* net/socket.c */
809 : asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
810 : unsigned flags, struct sockaddr __user *addr,
811 : int __user *addrlen);
812 : asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
813 : unsigned flags);
814 : asmlinkage 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 */
818 :
819 : /* security/keys/keyctl.c */
820 : asmlinkage long compat_sys_keyctl(u32 option,
821 : u32 arg2, u32 arg3, u32 arg4, u32 arg5);
822 :
823 : /* arch/example/kernel/sys_example.c */
824 : asmlinkage 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 */
830 : asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
831 : compat_pid_t pid, int sig,
832 : struct compat_siginfo __user *uinfo);
833 : asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
834 : unsigned vlen, unsigned int flags,
835 : struct __kernel_timespec __user *timeout);
836 : asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
837 : unsigned vlen, unsigned int flags,
838 : struct old_timespec32 __user *timeout);
839 : asmlinkage long compat_sys_wait4(compat_pid_t pid,
840 : compat_uint_t __user *stat_addr, int options,
841 : struct compat_rusage __user *ru);
842 : asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
843 : int, const char __user *);
844 : asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
845 : struct file_handle __user *handle,
846 : int flags);
847 : asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
848 : unsigned vlen, unsigned int flags);
849 : asmlinkage 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);
852 : asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
853 : const struct iovec __user *vec,
854 : compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
855 : asmlinkage ssize_t compat_sys_pwritev2(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 : #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
859 : asmlinkage long compat_sys_preadv64v2(unsigned long fd,
860 : const struct iovec __user *vec,
861 : unsigned long vlen, loff_t pos, rwf_t flags);
862 : #endif
863 :
864 : #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
865 : asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
866 : const struct iovec __user *vec,
867 : unsigned long vlen, loff_t pos, rwf_t flags);
868 : #endif
869 :
870 :
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 */
877 : asmlinkage long compat_sys_open(const char __user *filename, int flags,
878 : umode_t mode);
879 :
880 : /* __ARCH_WANT_SYSCALL_NO_FLAGS */
881 : asmlinkage 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 */
886 : asmlinkage long compat_sys_newstat(const char __user *filename,
887 : struct compat_stat __user *statbuf);
888 : asmlinkage long compat_sys_newlstat(const char __user *filename,
889 : struct compat_stat __user *statbuf);
890 :
891 : /* __ARCH_WANT_SYSCALL_DEPRECATED */
892 : asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
893 : compat_ulong_t __user *outp, compat_ulong_t __user *exp,
894 : struct old_timeval32 __user *tvp);
895 : asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
896 : asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
897 : unsigned flags);
898 :
899 : /* obsolete: fs/readdir.c */
900 : asmlinkage 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 */
905 : asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
906 :
907 : /* obsolete: ipc */
908 : asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
909 :
910 : /* obsolete: kernel/signal.c */
911 : #ifdef __ARCH_WANT_SYS_SIGPENDING
912 : asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
913 : #endif
914 :
915 : #ifdef __ARCH_WANT_SYS_SIGPROCMASK
916 : asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
917 : compat_old_sigset_t __user *oset);
918 : #endif
919 : #ifdef CONFIG_COMPAT_OLD_SIGACTION
920 : asmlinkage long compat_sys_sigaction(int sig,
921 : const struct compat_old_sigaction __user *act,
922 : struct compat_old_sigaction __user *oact);
923 : #endif
924 :
925 : /* obsolete: net/socket.c */
926 : asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
927 :
928 : #ifdef __ARCH_WANT_COMPAT_TRUNCATE64
929 : asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));
930 : #endif
931 :
932 : #ifdef __ARCH_WANT_COMPAT_FTRUNCATE64
933 : asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));
934 : #endif
935 :
936 : #ifdef __ARCH_WANT_COMPAT_FALLOCATE
937 : asmlinkage 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
942 : asmlinkage 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
947 : asmlinkage 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
952 : asmlinkage 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
957 : asmlinkage 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
962 : asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);
963 : #endif
964 :
965 : #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
966 :
967 : /**
968 : * ns_to_old_timeval32 - Compat version of ns_to_timeval
969 : * @nsec: the nanoseconds value to be converted
970 : *
971 : * Returns the old_timeval32 representation of the nsec parameter.
972 : */
973 : static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
974 : {
975 : struct __kernel_old_timeval tv;
976 : struct old_timeval32 ctv;
977 :
978 : tv = ns_to_kernel_old_timeval(nsec);
979 : ctv.tv_sec = tv.tv_sec;
980 : ctv.tv_usec = tv.tv_usec;
981 :
982 : return ctv;
983 : }
984 :
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 :
991 : int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
992 : struct compat_statfs64 __user * buf);
993 : int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
994 : struct compat_statfs64 __user * buf);
995 :
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
1004 : static inline bool in_compat_syscall(void) { return is_compat_task(); }
1005 : #endif
1006 :
1007 : #else /* !CONFIG_COMPAT */
1008 :
1009 : #define is_compat_task() (0)
1010 : /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
1011 : #define in_compat_syscall in_compat_syscall
1012 : static inline bool in_compat_syscall(void) { return false; }
1013 :
1014 : #endif /* CONFIG_COMPAT */
1015 :
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 :
1020 : long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
1021 : unsigned long bitmap_size);
1022 : long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
1023 : unsigned long bitmap_size);
1024 :
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 :
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
1041 : static inline void __user *compat_ptr(compat_uptr_t uptr)
1042 : {
1043 0 : return (void __user *)(unsigned long)uptr;
1044 : }
1045 : #endif
1046 :
1047 : static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1048 : {
1049 : return (u32)(unsigned long)uptr;
1050 : }
1051 :
1052 : #endif /* _LINUX_COMPAT_H */
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