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 :
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 : };
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_statfs;
385 : struct compat_statfs64;
386 : struct compat_old_linux_dirent;
387 : struct compat_linux_dirent;
388 : struct linux_dirent64;
389 : struct compat_msghdr;
390 : struct compat_mmsghdr;
391 : struct compat_sysinfo;
392 : struct compat_sysctl_args;
393 : struct compat_kexec_segment;
394 : struct compat_mq_attr;
395 : struct compat_msgbuf;
396 :
397 : #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
398 :
399 : #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
400 :
401 : long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
402 : unsigned long bitmap_size);
403 : long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
404 : unsigned long bitmap_size);
405 : void copy_siginfo_to_external32(struct compat_siginfo *to,
406 : const struct kernel_siginfo *from);
407 : int copy_siginfo_from_user32(kernel_siginfo_t *to,
408 : const struct compat_siginfo __user *from);
409 : int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
410 : const kernel_siginfo_t *from);
411 : #ifndef copy_siginfo_to_user32
412 : #define copy_siginfo_to_user32 __copy_siginfo_to_user32
413 : #endif
414 : int get_compat_sigevent(struct sigevent *event,
415 : const struct compat_sigevent __user *u_event);
416 :
417 : extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
418 :
419 : /*
420 : * Defined inline such that size can be compile time constant, which avoids
421 : * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
422 : */
423 : static inline int
424 0 : put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
425 : unsigned int size)
426 : {
427 : /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
428 : #ifdef __BIG_ENDIAN
429 : compat_sigset_t v;
430 : switch (_NSIG_WORDS) {
431 : case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
432 : fallthrough;
433 : case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
434 : fallthrough;
435 : case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
436 : fallthrough;
437 : case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
438 : }
439 : return copy_to_user(compat, &v, size) ? -EFAULT : 0;
440 : #else
441 0 : return copy_to_user(compat, set, size) ? -EFAULT : 0;
442 : #endif
443 : }
444 :
445 : #ifdef CONFIG_CPU_BIG_ENDIAN
446 : #define unsafe_put_compat_sigset(compat, set, label) do { \
447 : compat_sigset_t __user *__c = compat; \
448 : const sigset_t *__s = set; \
449 : \
450 : switch (_NSIG_WORDS) { \
451 : case 4: \
452 : unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
453 : unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
454 : fallthrough; \
455 : case 3: \
456 : unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
457 : unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
458 : fallthrough; \
459 : case 2: \
460 : unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
461 : unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
462 : fallthrough; \
463 : case 1: \
464 : unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
465 : unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
466 : } \
467 : } while (0)
468 : #else
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 : unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
474 : } while (0)
475 : #endif
476 :
477 : extern int compat_ptrace_request(struct task_struct *child,
478 : compat_long_t request,
479 : compat_ulong_t addr, compat_ulong_t data);
480 :
481 : extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
482 : compat_ulong_t addr, compat_ulong_t data);
483 :
484 : struct epoll_event; /* fortunately, this one is fixed-layout */
485 :
486 : extern void __user *compat_alloc_user_space(unsigned long len);
487 :
488 : int compat_restore_altstack(const compat_stack_t __user *uss);
489 : int __compat_save_altstack(compat_stack_t __user *, unsigned long);
490 : #define unsafe_compat_save_altstack(uss, sp, label) do { \
491 : compat_stack_t __user *__uss = uss; \
492 : struct task_struct *t = current; \
493 : unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
494 : &__uss->ss_sp, label); \
495 : unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
496 : unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
497 : if (t->sas_ss_flags & SS_AUTODISARM) \
498 : sas_ss_reset(t); \
499 : } while (0);
500 :
501 : /*
502 : * These syscall function prototypes are kept in the same order as
503 : * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
504 : * go below.
505 : *
506 : * Please note that these prototypes here are only provided for information
507 : * purposes, for static analysis, and for linking from the syscall table.
508 : * These functions should not be called elsewhere from kernel code.
509 : *
510 : * As the syscall calling convention may be different from the default
511 : * for architectures overriding the syscall calling convention, do not
512 : * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
513 : */
514 : #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
515 : asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
516 : asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
517 : u32 __user *iocb);
518 : asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
519 : compat_long_t min_nr,
520 : compat_long_t nr,
521 : struct io_event __user *events,
522 : struct old_timespec32 __user *timeout,
523 : const struct __compat_aio_sigset __user *usig);
524 : asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
525 : compat_long_t min_nr,
526 : compat_long_t nr,
527 : struct io_event __user *events,
528 : struct __kernel_timespec __user *timeout,
529 : const struct __compat_aio_sigset __user *usig);
530 :
531 : /* fs/cookies.c */
532 : asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
533 :
534 : /* fs/eventpoll.c */
535 : asmlinkage long compat_sys_epoll_pwait(int epfd,
536 : struct epoll_event __user *events,
537 : int maxevents, int timeout,
538 : const compat_sigset_t __user *sigmask,
539 : compat_size_t sigsetsize);
540 : asmlinkage long compat_sys_epoll_pwait2(int epfd,
541 : struct epoll_event __user *events,
542 : int maxevents,
543 : const struct __kernel_timespec __user *timeout,
544 : const compat_sigset_t __user *sigmask,
545 : compat_size_t sigsetsize);
546 :
547 : /* fs/fcntl.c */
548 : asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
549 : compat_ulong_t arg);
550 : asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
551 : compat_ulong_t arg);
552 :
553 : /* fs/ioctl.c */
554 : asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
555 : compat_ulong_t arg);
556 :
557 : /* fs/open.c */
558 : asmlinkage long compat_sys_statfs(const char __user *pathname,
559 : struct compat_statfs __user *buf);
560 : asmlinkage long compat_sys_statfs64(const char __user *pathname,
561 : compat_size_t sz,
562 : struct compat_statfs64 __user *buf);
563 : asmlinkage long compat_sys_fstatfs(unsigned int fd,
564 : struct compat_statfs __user *buf);
565 : asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
566 : struct compat_statfs64 __user *buf);
567 : asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
568 : asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
569 : /* No generic prototype for truncate64, ftruncate64, fallocate */
570 : asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
571 : int flags, umode_t mode);
572 :
573 : /* fs/readdir.c */
574 : asmlinkage long compat_sys_getdents(unsigned int fd,
575 : struct compat_linux_dirent __user *dirent,
576 : unsigned int count);
577 :
578 : /* fs/read_write.c */
579 : asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
580 : /* No generic prototype for pread64 and pwrite64 */
581 : asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
582 : const struct iovec __user *vec,
583 : compat_ulong_t vlen, u32 pos_low, u32 pos_high);
584 : asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
585 : const struct iovec __user *vec,
586 : compat_ulong_t vlen, u32 pos_low, u32 pos_high);
587 : #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
588 : asmlinkage long compat_sys_preadv64(unsigned long fd,
589 : const struct iovec __user *vec,
590 : unsigned long vlen, loff_t pos);
591 : #endif
592 :
593 : #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
594 : asmlinkage long compat_sys_pwritev64(unsigned long fd,
595 : const struct iovec __user *vec,
596 : unsigned long vlen, loff_t pos);
597 : #endif
598 :
599 : /* fs/sendfile.c */
600 : asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
601 : compat_off_t __user *offset, compat_size_t count);
602 : asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
603 : compat_loff_t __user *offset, compat_size_t count);
604 :
605 : /* fs/select.c */
606 : asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
607 : compat_ulong_t __user *outp,
608 : compat_ulong_t __user *exp,
609 : struct old_timespec32 __user *tsp,
610 : void __user *sig);
611 : asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
612 : compat_ulong_t __user *outp,
613 : compat_ulong_t __user *exp,
614 : struct __kernel_timespec __user *tsp,
615 : void __user *sig);
616 : asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
617 : unsigned int nfds,
618 : struct old_timespec32 __user *tsp,
619 : const compat_sigset_t __user *sigmask,
620 : compat_size_t sigsetsize);
621 : asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
622 : unsigned int nfds,
623 : struct __kernel_timespec __user *tsp,
624 : const compat_sigset_t __user *sigmask,
625 : compat_size_t sigsetsize);
626 :
627 : /* fs/signalfd.c */
628 : asmlinkage long compat_sys_signalfd4(int ufd,
629 : const compat_sigset_t __user *sigmask,
630 : compat_size_t sigsetsize, int flags);
631 :
632 : /* fs/stat.c */
633 : asmlinkage long compat_sys_newfstatat(unsigned int dfd,
634 : const char __user *filename,
635 : struct compat_stat __user *statbuf,
636 : int flag);
637 : asmlinkage long compat_sys_newfstat(unsigned int fd,
638 : struct compat_stat __user *statbuf);
639 :
640 : /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
641 :
642 : /* kernel/exit.c */
643 : asmlinkage long compat_sys_waitid(int, compat_pid_t,
644 : struct compat_siginfo __user *, int,
645 : struct compat_rusage __user *);
646 :
647 :
648 :
649 : /* kernel/futex.c */
650 : asmlinkage long
651 : compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
652 : compat_size_t len);
653 : asmlinkage long
654 : compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
655 : compat_size_t __user *len_ptr);
656 :
657 : /* kernel/itimer.c */
658 : asmlinkage long compat_sys_getitimer(int which,
659 : struct old_itimerval32 __user *it);
660 : asmlinkage long compat_sys_setitimer(int which,
661 : struct old_itimerval32 __user *in,
662 : struct old_itimerval32 __user *out);
663 :
664 : /* kernel/kexec.c */
665 : asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
666 : compat_ulong_t nr_segments,
667 : struct compat_kexec_segment __user *,
668 : compat_ulong_t flags);
669 :
670 : /* kernel/posix-timers.c */
671 : asmlinkage long compat_sys_timer_create(clockid_t which_clock,
672 : struct compat_sigevent __user *timer_event_spec,
673 : timer_t __user *created_timer_id);
674 :
675 : /* kernel/ptrace.c */
676 : asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
677 : compat_long_t addr, compat_long_t data);
678 :
679 : /* kernel/sched/core.c */
680 : asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
681 : unsigned int len,
682 : compat_ulong_t __user *user_mask_ptr);
683 : asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
684 : unsigned int len,
685 : compat_ulong_t __user *user_mask_ptr);
686 :
687 : /* kernel/signal.c */
688 : asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
689 : compat_stack_t __user *uoss_ptr);
690 : asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
691 : compat_size_t sigsetsize);
692 : #ifndef CONFIG_ODD_RT_SIGACTION
693 : asmlinkage long compat_sys_rt_sigaction(int,
694 : const struct compat_sigaction __user *,
695 : struct compat_sigaction __user *,
696 : compat_size_t);
697 : #endif
698 : asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
699 : compat_sigset_t __user *oset,
700 : compat_size_t sigsetsize);
701 : asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
702 : compat_size_t sigsetsize);
703 : asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
704 : struct compat_siginfo __user *uinfo,
705 : struct old_timespec32 __user *uts, compat_size_t sigsetsize);
706 : asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
707 : struct compat_siginfo __user *uinfo,
708 : struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
709 : asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
710 : struct compat_siginfo __user *uinfo);
711 : /* No generic prototype for rt_sigreturn */
712 :
713 : /* kernel/sys.c */
714 : asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
715 : asmlinkage long compat_sys_getrlimit(unsigned int resource,
716 : struct compat_rlimit __user *rlim);
717 : asmlinkage long compat_sys_setrlimit(unsigned int resource,
718 : struct compat_rlimit __user *rlim);
719 : asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
720 :
721 : /* kernel/time.c */
722 : asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
723 : struct timezone __user *tz);
724 : asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
725 : struct timezone __user *tz);
726 :
727 : /* kernel/timer.c */
728 : asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
729 :
730 : /* ipc/mqueue.c */
731 : asmlinkage long compat_sys_mq_open(const char __user *u_name,
732 : int oflag, compat_mode_t mode,
733 : struct compat_mq_attr __user *u_attr);
734 : asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
735 : const struct compat_sigevent __user *u_notification);
736 : asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
737 : const struct compat_mq_attr __user *u_mqstat,
738 : struct compat_mq_attr __user *u_omqstat);
739 :
740 : /* ipc/msg.c */
741 : asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
742 : asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
743 : compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
744 : asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
745 : compat_ssize_t msgsz, int msgflg);
746 :
747 : /* ipc/sem.c */
748 : asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
749 :
750 : /* ipc/shm.c */
751 : asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
752 : asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
753 :
754 : /* net/socket.c */
755 : asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
756 : unsigned flags, struct sockaddr __user *addr,
757 : int __user *addrlen);
758 : asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
759 : unsigned flags);
760 : asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
761 : unsigned int flags);
762 :
763 : /* mm/filemap.c: No generic prototype for readahead */
764 :
765 : /* security/keys/keyctl.c */
766 : asmlinkage long compat_sys_keyctl(u32 option,
767 : u32 arg2, u32 arg3, u32 arg4, u32 arg5);
768 :
769 : /* arch/example/kernel/sys_example.c */
770 : asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
771 : const compat_uptr_t __user *envp);
772 :
773 : /* mm/fadvise.c: No generic prototype for fadvise64_64 */
774 :
775 : /* mm/, CONFIG_MMU only */
776 : asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
777 : compat_ulong_t mode,
778 : compat_ulong_t __user *nmask,
779 : compat_ulong_t maxnode, compat_ulong_t flags);
780 : asmlinkage long compat_sys_get_mempolicy(int __user *policy,
781 : compat_ulong_t __user *nmask,
782 : compat_ulong_t maxnode,
783 : compat_ulong_t addr,
784 : compat_ulong_t flags);
785 : asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
786 : compat_ulong_t maxnode);
787 : asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
788 : compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
789 : const compat_ulong_t __user *new_nodes);
790 : asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
791 : __u32 __user *pages,
792 : const int __user *nodes,
793 : int __user *status,
794 : int flags);
795 :
796 : asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
797 : compat_pid_t pid, int sig,
798 : struct compat_siginfo __user *uinfo);
799 : asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
800 : unsigned vlen, unsigned int flags,
801 : struct __kernel_timespec __user *timeout);
802 : asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
803 : unsigned vlen, unsigned int flags,
804 : struct old_timespec32 __user *timeout);
805 : asmlinkage long compat_sys_wait4(compat_pid_t pid,
806 : compat_uint_t __user *stat_addr, int options,
807 : struct compat_rusage __user *ru);
808 : asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
809 : int, const char __user *);
810 : asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
811 : struct file_handle __user *handle,
812 : int flags);
813 : asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
814 : unsigned vlen, unsigned int flags);
815 : asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
816 : const compat_uptr_t __user *argv,
817 : const compat_uptr_t __user *envp, int flags);
818 : asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
819 : const struct iovec __user *vec,
820 : compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
821 : asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
822 : const struct iovec __user *vec,
823 : compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
824 : #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
825 : asmlinkage long compat_sys_preadv64v2(unsigned long fd,
826 : const struct iovec __user *vec,
827 : unsigned long vlen, loff_t pos, rwf_t flags);
828 : #endif
829 :
830 : #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
831 : asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
832 : const struct iovec __user *vec,
833 : unsigned long vlen, loff_t pos, rwf_t flags);
834 : #endif
835 :
836 :
837 : /*
838 : * Deprecated system calls which are still defined in
839 : * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
840 : */
841 :
842 : /* __ARCH_WANT_SYSCALL_NO_AT */
843 : asmlinkage long compat_sys_open(const char __user *filename, int flags,
844 : umode_t mode);
845 :
846 : /* __ARCH_WANT_SYSCALL_NO_FLAGS */
847 : asmlinkage long compat_sys_signalfd(int ufd,
848 : const compat_sigset_t __user *sigmask,
849 : compat_size_t sigsetsize);
850 :
851 : /* __ARCH_WANT_SYSCALL_OFF_T */
852 : asmlinkage long compat_sys_newstat(const char __user *filename,
853 : struct compat_stat __user *statbuf);
854 : asmlinkage long compat_sys_newlstat(const char __user *filename,
855 : struct compat_stat __user *statbuf);
856 :
857 : /* __ARCH_WANT_SYSCALL_DEPRECATED */
858 : asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
859 : compat_ulong_t __user *outp, compat_ulong_t __user *exp,
860 : struct old_timeval32 __user *tvp);
861 : asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
862 : asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
863 : unsigned flags);
864 :
865 : /* obsolete: fs/readdir.c */
866 : asmlinkage long compat_sys_old_readdir(unsigned int fd,
867 : struct compat_old_linux_dirent __user *,
868 : unsigned int count);
869 :
870 : /* obsolete: fs/select.c */
871 : asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
872 :
873 : /* obsolete: ipc */
874 : asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
875 :
876 : /* obsolete: kernel/signal.c */
877 : #ifdef __ARCH_WANT_SYS_SIGPENDING
878 : asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
879 : #endif
880 :
881 : #ifdef __ARCH_WANT_SYS_SIGPROCMASK
882 : asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
883 : compat_old_sigset_t __user *oset);
884 : #endif
885 : #ifdef CONFIG_COMPAT_OLD_SIGACTION
886 : asmlinkage long compat_sys_sigaction(int sig,
887 : const struct compat_old_sigaction __user *act,
888 : struct compat_old_sigaction __user *oact);
889 : #endif
890 :
891 : /* obsolete: net/socket.c */
892 : asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
893 :
894 : #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
895 :
896 :
897 : /*
898 : * For most but not all architectures, "am I in a compat syscall?" and
899 : * "am I a compat task?" are the same question. For architectures on which
900 : * they aren't the same question, arch code can override in_compat_syscall.
901 : */
902 :
903 : #ifndef in_compat_syscall
904 : static inline bool in_compat_syscall(void) { return is_compat_task(); }
905 : #endif
906 :
907 : /**
908 : * ns_to_old_timeval32 - Compat version of ns_to_timeval
909 : * @nsec: the nanoseconds value to be converted
910 : *
911 : * Returns the old_timeval32 representation of the nsec parameter.
912 : */
913 : static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
914 : {
915 : struct __kernel_old_timeval tv;
916 : struct old_timeval32 ctv;
917 :
918 : tv = ns_to_kernel_old_timeval(nsec);
919 : ctv.tv_sec = tv.tv_sec;
920 : ctv.tv_usec = tv.tv_usec;
921 :
922 : return ctv;
923 : }
924 :
925 : /*
926 : * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
927 : * directly. Instead, use one of the functions which work equivalently, such
928 : * as the kcompat_sys_xyzyyz() functions prototyped below.
929 : */
930 :
931 : int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
932 : struct compat_statfs64 __user * buf);
933 : int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
934 : struct compat_statfs64 __user * buf);
935 :
936 : #else /* !CONFIG_COMPAT */
937 :
938 : #define is_compat_task() (0)
939 : /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
940 : #define in_compat_syscall in_compat_syscall
941 : static inline bool in_compat_syscall(void) { return false; }
942 :
943 : #endif /* CONFIG_COMPAT */
944 :
945 : /*
946 : * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
947 : * types, and will need special compat treatment for that. Most architectures
948 : * don't need that special handling even for compat syscalls.
949 : */
950 : #ifndef compat_need_64bit_alignment_fixup
951 : #define compat_need_64bit_alignment_fixup() false
952 : #endif
953 :
954 : /*
955 : * A pointer passed in from user mode. This should not
956 : * be used for syscall parameters, just declare them
957 : * as pointers because the syscall entry code will have
958 : * appropriately converted them already.
959 : */
960 : #ifndef compat_ptr
961 0 : static inline void __user *compat_ptr(compat_uptr_t uptr)
962 : {
963 0 : return (void __user *)(unsigned long)uptr;
964 : }
965 : #endif
966 :
967 0 : static inline compat_uptr_t ptr_to_compat(void __user *uptr)
968 : {
969 0 : return (u32)(unsigned long)uptr;
970 : }
971 :
972 : #endif /* _LINUX_COMPAT_H */
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