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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_COMPAT_H |
3 | #define _LINUX_COMPAT_H | |
4 | /* | |
5 | * These are the type definitions for the architecture specific | |
6 | * syscall compatibility layer. | |
7 | */ | |
1da177e4 | 8 | |
5180e3e2 | 9 | #include <linux/types.h> |
9afc5eee | 10 | #include <linux/time.h> |
1da177e4 LT |
11 | |
12 | #include <linux/stat.h> | |
13 | #include <linux/param.h> /* for HZ */ | |
14 | #include <linux/sem.h> | |
2dceba14 AB |
15 | #include <linux/socket.h> |
16 | #include <linux/if.h> | |
be84cb43 | 17 | #include <linux/fs.h> |
45e9683e | 18 | #include <linux/aio_abi.h> /* for aio_context_t */ |
fde9fc76 | 19 | #include <linux/uaccess.h> |
f5b972e9 | 20 | #include <linux/unistd.h> |
1da177e4 LT |
21 | |
22 | #include <asm/compat.h> | |
2b5a9a37 AB |
23 | |
24 | #ifdef CONFIG_COMPAT | |
1da177e4 | 25 | #include <asm/siginfo.h> |
3f2e05e9 | 26 | #include <asm/signal.h> |
5055c677 | 27 | #endif |
1da177e4 | 28 | |
7303e30e DB |
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 | ||
45e87781 L |
40 | #ifndef COMPAT_USE_64BIT_TIME |
41 | #define COMPAT_USE_64BIT_TIME 0 | |
42 | #endif | |
43 | ||
46836613 | 44 | #ifndef __SC_DELOUSE |
4f59c718 | 45 | #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) |
46836613 AV |
46 | #endif |
47 | ||
7303e30e | 48 | #ifndef COMPAT_SYSCALL_DEFINE0 |
217f4433 | 49 | #define COMPAT_SYSCALL_DEFINE0(name) \ |
c9a21195 HM |
50 | asmlinkage long compat_sys_##name(void); \ |
51 | ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ | |
217f4433 | 52 | asmlinkage long compat_sys_##name(void) |
7303e30e | 53 | #endif /* COMPAT_SYSCALL_DEFINE0 */ |
217f4433 | 54 | |
46836613 AV |
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 | ||
5ac9efa3 DB |
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 | */ | |
7303e30e | 73 | #ifndef COMPAT_SYSCALL_DEFINEx |
5ac9efa3 | 74 | #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ |
bee20031 AB |
75 | __diag_push(); \ |
76 | __diag_ignore(GCC, 8, "-Wattribute-alias", \ | |
77 | "Type aliasing is used to sanitize syscall arguments");\ | |
5ac9efa3 DB |
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 | { \ | |
bee20031 AB |
86 | long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ |
87 | __MAP(x,__SC_TEST,__VA_ARGS__); \ | |
88 | return ret; \ | |
5ac9efa3 | 89 | } \ |
bee20031 | 90 | __diag_pop(); \ |
5ac9efa3 | 91 | static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) |
7303e30e | 92 | #endif /* COMPAT_SYSCALL_DEFINEx */ |
46836613 | 93 | |
bfdc5970 CH |
94 | struct compat_iovec { |
95 | compat_uptr_t iov_base; | |
96 | compat_size_t iov_len; | |
97 | }; | |
98 | ||
5055c677 DD |
99 | #ifdef CONFIG_COMPAT |
100 | ||
9b064fc3 AV |
101 | #ifndef compat_user_stack_pointer |
102 | #define compat_user_stack_pointer() current_user_stack_pointer() | |
103 | #endif | |
90268439 AV |
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 | |
22839869 WD |
111 | #ifndef COMPAT_MINSIGSTKSZ |
112 | #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ | |
113 | #endif | |
90268439 | 114 | |
1da177e4 LT |
115 | #define compat_jiffies_to_clock_t(x) \ |
116 | (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) | |
117 | ||
202e5979 SR |
118 | typedef __compat_uid32_t compat_uid_t; |
119 | typedef __compat_gid32_t compat_gid_t; | |
120 | ||
5d0e5283 | 121 | struct compat_sel_arg_struct; |
1da177e4 LT |
122 | struct rusage; |
123 | ||
c1745f84 | 124 | struct old_itimerval32; |
54ad9c46 | 125 | |
1da177e4 LT |
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 | ||
b772434b | 139 | int set_compat_user_sigmask(const compat_sigset_t __user *umask, |
ded653cc DD |
140 | size_t sigsetsize); |
141 | ||
08d32fe5 | 142 | struct compat_sigaction { |
2a148698 | 143 | #ifndef __ARCH_HAS_IRIX_SIGACTION |
08d32fe5 AV |
144 | compat_uptr_t sa_handler; |
145 | compat_ulong_t sa_flags; | |
146 | #else | |
2a148698 | 147 | compat_uint_t sa_flags; |
08d32fe5 AV |
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 | }; | |
08d32fe5 | 155 | |
b713da69 AV |
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 | |
8420f719 EB |
220 | #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ |
221 | sizeof(short) : __alignof__(compat_uptr_t)) | |
b713da69 | 222 | union { |
b68a68d3 EB |
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. */ | |
b713da69 AV |
228 | /* used when si_code=SEGV_BNDERR */ |
229 | struct { | |
8420f719 | 230 | char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; |
b713da69 AV |
231 | compat_uptr_t _lower; |
232 | compat_uptr_t _upper; | |
233 | } _addr_bnd; | |
234 | /* used when si_code=SEGV_PKUERR */ | |
b68a68d3 | 235 | struct { |
8420f719 | 236 | char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; |
b68a68d3 EB |
237 | u32 _pkey; |
238 | } _addr_pkey; | |
b713da69 AV |
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 | ||
1da177e4 LT |
256 | struct compat_rlimit { |
257 | compat_ulong_t rlim_cur; | |
258 | compat_ulong_t rlim_max; | |
259 | }; | |
260 | ||
261 | struct compat_rusage { | |
9afc5eee AB |
262 | struct old_timeval32 ru_utime; |
263 | struct old_timeval32 ru_stime; | |
1da177e4 LT |
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 | ||
4800a5bb CM |
280 | extern int put_compat_rusage(const struct rusage *, |
281 | struct compat_rusage __user *); | |
1da177e4 LT |
282 | |
283 | struct compat_siginfo; | |
7a074e96 | 284 | struct __compat_aio_sigset; |
1da177e4 | 285 | |
1da177e4 LT |
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 | ||
2b1c6bd7 CH |
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 | ||
1da177e4 LT |
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 | ||
2dceba14 AB |
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 | ||
4800a5bb | 326 | struct compat_if_settings { |
7a50a240 AB |
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 | ||
2dceba14 | 332 | struct compat_ifreq { |
7a50a240 AB |
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 */ | |
2dceba14 | 347 | char ifru_newname[IFNAMSIZ]; |
7a50a240 AB |
348 | compat_caddr_t ifru_data; |
349 | struct compat_if_settings ifru_settings; | |
350 | } ifr_ifru; | |
2dceba14 AB |
351 | }; |
352 | ||
353 | struct compat_ifconf { | |
4800a5bb CM |
354 | compat_int_t ifc_len; /* size of buffer */ |
355 | compat_caddr_t ifcbuf; | |
2dceba14 AB |
356 | }; |
357 | ||
34f192c6 IM |
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 | ||
495dfbf7 AV |
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 | ||
f1c316a3 SM |
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 | ||
be84cb43 CM |
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; | |
48b25c43 | 395 | struct compat_msgbuf; |
be84cb43 | 396 | |
1da177e4 LT |
397 | #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) |
398 | ||
1e1fc133 | 399 | #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) |
1da177e4 | 400 | |
5fa3839a | 401 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4 LT |
402 | unsigned long bitmap_size); |
403 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, | |
404 | unsigned long bitmap_size); | |
c3b3f524 CH |
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 | |
1da177e4 LT |
414 | int get_compat_sigevent(struct sigevent *event, |
415 | const struct compat_sigevent __user *u_event); | |
416 | ||
3968cf62 | 417 | extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); |
fde9fc76 MR |
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 | 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]; | |
df561f66 | 432 | fallthrough; |
fde9fc76 | 433 | case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; |
df561f66 | 434 | fallthrough; |
fde9fc76 | 435 | case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; |
df561f66 | 436 | fallthrough; |
fde9fc76 MR |
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 | return copy_to_user(compat, set, size) ? -EFAULT : 0; | |
442 | #endif | |
443 | } | |
bebfa101 | 444 | |
032d82d9 RM |
445 | extern int compat_ptrace_request(struct task_struct *child, |
446 | compat_long_t request, | |
447 | compat_ulong_t addr, compat_ulong_t data); | |
448 | ||
c269f196 RM |
449 | extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, |
450 | compat_ulong_t addr, compat_ulong_t data); | |
c269f196 | 451 | |
c679a089 DB |
452 | struct epoll_event; /* fortunately, this one is fixed-layout */ |
453 | ||
c679a089 DB |
454 | extern void __user *compat_alloc_user_space(unsigned long len); |
455 | ||
456 | int compat_restore_altstack(const compat_stack_t __user *uss); | |
457 | int __compat_save_altstack(compat_stack_t __user *, unsigned long); | |
39f16c1c | 458 | #define unsafe_compat_save_altstack(uss, sp, label) do { \ |
c679a089 DB |
459 | compat_stack_t __user *__uss = uss; \ |
460 | struct task_struct *t = current; \ | |
39f16c1c AV |
461 | unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ |
462 | &__uss->ss_sp, label); \ | |
463 | unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ | |
464 | unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ | |
c679a089 DB |
465 | if (t->sas_ss_flags & SS_AUTODISARM) \ |
466 | sas_ss_reset(t); \ | |
467 | } while (0); | |
468 | ||
f6dfb4fd | 469 | /* |
c679a089 | 470 | * These syscall function prototypes are kept in the same order as |
3e2052e5 DB |
471 | * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls |
472 | * go below. | |
c679a089 DB |
473 | * |
474 | * Please note that these prototypes here are only provided for information | |
475 | * purposes, for static analysis, and for linking from the syscall table. | |
476 | * These functions should not be called elsewhere from kernel code. | |
7303e30e DB |
477 | * |
478 | * As the syscall calling convention may be different from the default | |
479 | * for architectures overriding the syscall calling convention, do not | |
480 | * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. | |
f6dfb4fd | 481 | */ |
7303e30e | 482 | #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER |
c679a089 DB |
483 | asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); |
484 | asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, | |
485 | u32 __user *iocb); | |
7a074e96 CH |
486 | asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, |
487 | compat_long_t min_nr, | |
488 | compat_long_t nr, | |
489 | struct io_event __user *events, | |
9afc5eee | 490 | struct old_timespec32 __user *timeout, |
7a074e96 | 491 | const struct __compat_aio_sigset __user *usig); |
7a35397f DD |
492 | asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, |
493 | compat_long_t min_nr, | |
494 | compat_long_t nr, | |
495 | struct io_event __user *events, | |
496 | struct __kernel_timespec __user *timeout, | |
497 | const struct __compat_aio_sigset __user *usig); | |
c679a089 DB |
498 | |
499 | /* fs/cookies.c */ | |
500 | asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); | |
501 | ||
502 | /* fs/eventpoll.c */ | |
f6dfb4fd | 503 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
35280bd4 | 504 | struct epoll_event __user *events, |
f6dfb4fd DL |
505 | int maxevents, int timeout, |
506 | const compat_sigset_t __user *sigmask, | |
507 | compat_size_t sigsetsize); | |
508 | ||
c679a089 DB |
509 | /* fs/fcntl.c */ |
510 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
511 | compat_ulong_t arg); | |
512 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
513 | compat_ulong_t arg); | |
97416ce8 | 514 | |
c679a089 DB |
515 | /* fs/ioctl.c */ |
516 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
517 | compat_ulong_t arg); | |
140ff8b0 | 518 | |
c679a089 | 519 | /* fs/open.c */ |
be84cb43 CM |
520 | asmlinkage long compat_sys_statfs(const char __user *pathname, |
521 | struct compat_statfs __user *buf); | |
be84cb43 CM |
522 | asmlinkage long compat_sys_statfs64(const char __user *pathname, |
523 | compat_size_t sz, | |
524 | struct compat_statfs64 __user *buf); | |
c679a089 DB |
525 | asmlinkage long compat_sys_fstatfs(unsigned int fd, |
526 | struct compat_statfs __user *buf); | |
be84cb43 CM |
527 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, |
528 | struct compat_statfs64 __user *buf); | |
c679a089 DB |
529 | asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); |
530 | asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); | |
531 | /* No generic prototype for truncate64, ftruncate64, fallocate */ | |
532 | asmlinkage long compat_sys_openat(int dfd, const char __user *filename, | |
533 | int flags, umode_t mode); | |
534 | ||
535 | /* fs/readdir.c */ | |
be84cb43 CM |
536 | asmlinkage long compat_sys_getdents(unsigned int fd, |
537 | struct compat_linux_dirent __user *dirent, | |
538 | unsigned int count); | |
c679a089 DB |
539 | |
540 | /* fs/read_write.c */ | |
541 | asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); | |
c679a089 DB |
542 | /* No generic prototype for pread64 and pwrite64 */ |
543 | asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, | |
3523a9d4 | 544 | const struct iovec __user *vec, |
c679a089 DB |
545 | compat_ulong_t vlen, u32 pos_low, u32 pos_high); |
546 | asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, | |
3523a9d4 | 547 | const struct iovec __user *vec, |
c679a089 DB |
548 | compat_ulong_t vlen, u32 pos_low, u32 pos_high); |
549 | #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 | |
550 | asmlinkage long compat_sys_preadv64(unsigned long fd, | |
3523a9d4 | 551 | const struct iovec __user *vec, |
c679a089 DB |
552 | unsigned long vlen, loff_t pos); |
553 | #endif | |
554 | ||
555 | #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 | |
556 | asmlinkage long compat_sys_pwritev64(unsigned long fd, | |
3523a9d4 | 557 | const struct iovec __user *vec, |
c679a089 DB |
558 | unsigned long vlen, loff_t pos); |
559 | #endif | |
560 | ||
561 | /* fs/sendfile.c */ | |
562 | asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, | |
563 | compat_off_t __user *offset, compat_size_t count); | |
564 | asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, | |
565 | compat_loff_t __user *offset, compat_size_t count); | |
566 | ||
567 | /* fs/select.c */ | |
8dabe724 | 568 | asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, |
be84cb43 CM |
569 | compat_ulong_t __user *outp, |
570 | compat_ulong_t __user *exp, | |
9afc5eee | 571 | struct old_timespec32 __user *tsp, |
be84cb43 | 572 | void __user *sig); |
e024707b DD |
573 | asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, |
574 | compat_ulong_t __user *outp, | |
575 | compat_ulong_t __user *exp, | |
576 | struct __kernel_timespec __user *tsp, | |
577 | void __user *sig); | |
8dabe724 | 578 | asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, |
be84cb43 | 579 | unsigned int nfds, |
9afc5eee | 580 | struct old_timespec32 __user *tsp, |
be84cb43 CM |
581 | const compat_sigset_t __user *sigmask, |
582 | compat_size_t sigsetsize); | |
8bd27a30 DD |
583 | asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, |
584 | unsigned int nfds, | |
585 | struct __kernel_timespec __user *tsp, | |
586 | const compat_sigset_t __user *sigmask, | |
587 | compat_size_t sigsetsize); | |
c679a089 DB |
588 | |
589 | /* fs/signalfd.c */ | |
be84cb43 CM |
590 | asmlinkage long compat_sys_signalfd4(int ufd, |
591 | const compat_sigset_t __user *sigmask, | |
592 | compat_size_t sigsetsize, int flags); | |
be84cb43 | 593 | |
c679a089 DB |
594 | /* fs/stat.c */ |
595 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, | |
596 | const char __user *filename, | |
597 | struct compat_stat __user *statbuf, | |
598 | int flag); | |
599 | asmlinkage long compat_sys_newfstat(unsigned int fd, | |
600 | struct compat_stat __user *statbuf); | |
601 | ||
602 | /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ | |
603 | ||
c679a089 DB |
604 | /* kernel/exit.c */ |
605 | asmlinkage long compat_sys_waitid(int, compat_pid_t, | |
606 | struct compat_siginfo __user *, int, | |
607 | struct compat_rusage __user *); | |
608 | ||
609 | ||
610 | ||
611 | /* kernel/futex.c */ | |
c679a089 DB |
612 | asmlinkage long |
613 | compat_sys_set_robust_list(struct compat_robust_list_head __user *head, | |
614 | compat_size_t len); | |
615 | asmlinkage long | |
616 | compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, | |
617 | compat_size_t __user *len_ptr); | |
618 | ||
c679a089 | 619 | /* kernel/itimer.c */ |
be84cb43 | 620 | asmlinkage long compat_sys_getitimer(int which, |
c1745f84 | 621 | struct old_itimerval32 __user *it); |
be84cb43 | 622 | asmlinkage long compat_sys_setitimer(int which, |
c1745f84 AB |
623 | struct old_itimerval32 __user *in, |
624 | struct old_itimerval32 __user *out); | |
c679a089 DB |
625 | |
626 | /* kernel/kexec.c */ | |
627 | asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, | |
628 | compat_ulong_t nr_segments, | |
629 | struct compat_kexec_segment __user *, | |
630 | compat_ulong_t flags); | |
631 | ||
632 | /* kernel/posix-timers.c */ | |
be84cb43 CM |
633 | asmlinkage long compat_sys_timer_create(clockid_t which_clock, |
634 | struct compat_sigevent __user *timer_event_spec, | |
635 | timer_t __user *created_timer_id); | |
c679a089 DB |
636 | |
637 | /* kernel/ptrace.c */ | |
638 | asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, | |
639 | compat_long_t addr, compat_long_t data); | |
640 | ||
641 | /* kernel/sched/core.c */ | |
642 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, | |
643 | unsigned int len, | |
644 | compat_ulong_t __user *user_mask_ptr); | |
645 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, | |
646 | unsigned int len, | |
647 | compat_ulong_t __user *user_mask_ptr); | |
c679a089 DB |
648 | |
649 | /* kernel/signal.c */ | |
650 | asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, | |
651 | compat_stack_t __user *uoss_ptr); | |
be84cb43 CM |
652 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, |
653 | compat_size_t sigsetsize); | |
08d32fe5 | 654 | #ifndef CONFIG_ODD_RT_SIGACTION |
08d32fe5 AV |
655 | asmlinkage long compat_sys_rt_sigaction(int, |
656 | const struct compat_sigaction __user *, | |
657 | struct compat_sigaction __user *, | |
658 | compat_size_t); | |
659 | #endif | |
c679a089 DB |
660 | asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, |
661 | compat_sigset_t __user *oset, | |
662 | compat_size_t sigsetsize); | |
663 | asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, | |
664 | compat_size_t sigsetsize); | |
8dabe724 | 665 | asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, |
c679a089 | 666 | struct compat_siginfo __user *uinfo, |
9afc5eee | 667 | struct old_timespec32 __user *uts, compat_size_t sigsetsize); |
2367c4b5 AB |
668 | asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, |
669 | struct compat_siginfo __user *uinfo, | |
670 | struct __kernel_timespec __user *uts, compat_size_t sigsetsize); | |
75907d4d AV |
671 | asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, |
672 | struct compat_siginfo __user *uinfo); | |
c679a089 DB |
673 | /* No generic prototype for rt_sigreturn */ |
674 | ||
675 | /* kernel/sys.c */ | |
676 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); | |
677 | asmlinkage long compat_sys_getrlimit(unsigned int resource, | |
678 | struct compat_rlimit __user *rlim); | |
679 | asmlinkage long compat_sys_setrlimit(unsigned int resource, | |
680 | struct compat_rlimit __user *rlim); | |
681 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); | |
682 | ||
683 | /* kernel/time.c */ | |
9afc5eee | 684 | asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, |
c679a089 | 685 | struct timezone __user *tz); |
9afc5eee | 686 | asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, |
c679a089 | 687 | struct timezone __user *tz); |
c679a089 DB |
688 | |
689 | /* kernel/timer.c */ | |
be84cb43 | 690 | asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); |
c679a089 DB |
691 | |
692 | /* ipc/mqueue.c */ | |
be84cb43 CM |
693 | asmlinkage long compat_sys_mq_open(const char __user *u_name, |
694 | int oflag, compat_mode_t mode, | |
695 | struct compat_mq_attr __user *u_attr); | |
c679a089 DB |
696 | asmlinkage long compat_sys_mq_notify(mqd_t mqdes, |
697 | const struct compat_sigevent __user *u_notification); | |
698 | asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, | |
699 | const struct compat_mq_attr __user *u_mqstat, | |
700 | struct compat_mq_attr __user *u_omqstat); | |
4c696ba7 | 701 | |
c679a089 DB |
702 | /* ipc/msg.c */ |
703 | asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); | |
704 | asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, | |
705 | compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); | |
706 | asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, | |
707 | compat_ssize_t msgsz, int msgflg); | |
c41d68a5 | 708 | |
c679a089 DB |
709 | /* ipc/sem.c */ |
710 | asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); | |
c679a089 DB |
711 | |
712 | /* ipc/shm.c */ | |
713 | asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); | |
714 | asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); | |
715 | ||
716 | /* net/socket.c */ | |
717 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, | |
718 | unsigned flags, struct sockaddr __user *addr, | |
719 | int __user *addrlen); | |
c679a089 DB |
720 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, |
721 | unsigned flags); | |
722 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, | |
723 | unsigned int flags); | |
724 | ||
725 | /* mm/filemap.c: No generic prototype for readahead */ | |
c41d68a5 | 726 | |
c679a089 DB |
727 | /* security/keys/keyctl.c */ |
728 | asmlinkage long compat_sys_keyctl(u32 option, | |
729 | u32 arg2, u32 arg3, u32 arg4, u32 arg5); | |
730 | ||
731 | /* arch/example/kernel/sys_example.c */ | |
732 | asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, | |
733 | const compat_uptr_t __user *envp); | |
734 | ||
735 | /* mm/fadvise.c: No generic prototype for fadvise64_64 */ | |
736 | ||
737 | /* mm/, CONFIG_MMU only */ | |
738 | asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, | |
739 | compat_ulong_t mode, | |
740 | compat_ulong_t __user *nmask, | |
741 | compat_ulong_t maxnode, compat_ulong_t flags); | |
742 | asmlinkage long compat_sys_get_mempolicy(int __user *policy, | |
743 | compat_ulong_t __user *nmask, | |
744 | compat_ulong_t maxnode, | |
745 | compat_ulong_t addr, | |
746 | compat_ulong_t flags); | |
747 | asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, | |
748 | compat_ulong_t maxnode); | |
749 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, | |
750 | compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, | |
751 | const compat_ulong_t __user *new_nodes); | |
752 | asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, | |
753 | __u32 __user *pages, | |
754 | const int __user *nodes, | |
755 | int __user *status, | |
756 | int flags); | |
757 | ||
758 | asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, | |
759 | compat_pid_t pid, int sig, | |
760 | struct compat_siginfo __user *uinfo); | |
e11d4284 AB |
761 | asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, |
762 | unsigned vlen, unsigned int flags, | |
763 | struct __kernel_timespec __user *timeout); | |
8dabe724 | 764 | asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, |
c679a089 | 765 | unsigned vlen, unsigned int flags, |
9afc5eee | 766 | struct old_timespec32 __user *timeout); |
c679a089 DB |
767 | asmlinkage long compat_sys_wait4(compat_pid_t pid, |
768 | compat_uint_t __user *stat_addr, int options, | |
769 | struct compat_rusage __user *ru); | |
770 | asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, | |
771 | int, const char __user *); | |
772 | asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, | |
773 | struct file_handle __user *handle, | |
774 | int flags); | |
c679a089 DB |
775 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
776 | unsigned vlen, unsigned int flags); | |
c679a089 DB |
777 | asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, |
778 | const compat_uptr_t __user *argv, | |
779 | const compat_uptr_t __user *envp, int flags); | |
780 | asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, | |
3523a9d4 | 781 | const struct iovec __user *vec, |
c679a089 DB |
782 | compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); |
783 | asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, | |
3523a9d4 | 784 | const struct iovec __user *vec, |
c679a089 DB |
785 | compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); |
786 | #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 | |
576d0703 | 787 | asmlinkage long compat_sys_preadv64v2(unsigned long fd, |
3523a9d4 | 788 | const struct iovec __user *vec, |
c679a089 DB |
789 | unsigned long vlen, loff_t pos, rwf_t flags); |
790 | #endif | |
a67ba43d | 791 | |
c679a089 DB |
792 | #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 |
793 | asmlinkage long compat_sys_pwritev64v2(unsigned long fd, | |
3523a9d4 | 794 | const struct iovec __user *vec, |
c679a089 DB |
795 | unsigned long vlen, loff_t pos, rwf_t flags); |
796 | #endif | |
797 | ||
798 | ||
c679a089 DB |
799 | /* |
800 | * Deprecated system calls which are still defined in | |
801 | * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch | |
802 | */ | |
803 | ||
804 | /* __ARCH_WANT_SYSCALL_NO_AT */ | |
805 | asmlinkage long compat_sys_open(const char __user *filename, int flags, | |
806 | umode_t mode); | |
c679a089 DB |
807 | |
808 | /* __ARCH_WANT_SYSCALL_NO_FLAGS */ | |
809 | asmlinkage long compat_sys_signalfd(int ufd, | |
810 | const compat_sigset_t __user *sigmask, | |
811 | compat_size_t sigsetsize); | |
812 | ||
813 | /* __ARCH_WANT_SYSCALL_OFF_T */ | |
814 | asmlinkage long compat_sys_newstat(const char __user *filename, | |
815 | struct compat_stat __user *statbuf); | |
816 | asmlinkage long compat_sys_newlstat(const char __user *filename, | |
817 | struct compat_stat __user *statbuf); | |
818 | ||
819 | /* __ARCH_WANT_SYSCALL_DEPRECATED */ | |
c679a089 DB |
820 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
821 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
9afc5eee | 822 | struct old_timeval32 __user *tvp); |
c679a089 DB |
823 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); |
824 | asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, | |
825 | unsigned flags); | |
c679a089 DB |
826 | |
827 | /* obsolete: fs/readdir.c */ | |
828 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
829 | struct compat_old_linux_dirent __user *, | |
830 | unsigned int count); | |
831 | ||
832 | /* obsolete: fs/select.c */ | |
833 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); | |
834 | ||
835 | /* obsolete: ipc */ | |
836 | asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); | |
90268439 | 837 | |
c679a089 | 838 | /* obsolete: kernel/signal.c */ |
e9fb8b7e CM |
839 | #ifdef __ARCH_WANT_SYS_SIGPENDING |
840 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); | |
841 | #endif | |
842 | ||
843 | #ifdef __ARCH_WANT_SYS_SIGPROCMASK | |
844 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, | |
845 | compat_old_sigset_t __user *oset); | |
846 | #endif | |
c679a089 DB |
847 | #ifdef CONFIG_COMPAT_OLD_SIGACTION |
848 | asmlinkage long compat_sys_sigaction(int sig, | |
849 | const struct compat_old_sigaction __user *act, | |
850 | struct compat_old_sigaction __user *oact); | |
851 | #endif | |
e9fb8b7e | 852 | |
c679a089 DB |
853 | /* obsolete: net/socket.c */ |
854 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args); | |
5180e3e2 | 855 | |
7303e30e DB |
856 | #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ |
857 | ||
79170fda | 858 | |
5180e3e2 AL |
859 | /* |
860 | * For most but not all architectures, "am I in a compat syscall?" and | |
861 | * "am I a compat task?" are the same question. For architectures on which | |
862 | * they aren't the same question, arch code can override in_compat_syscall. | |
863 | */ | |
864 | ||
865 | #ifndef in_compat_syscall | |
866 | static inline bool in_compat_syscall(void) { return is_compat_task(); } | |
867 | #endif | |
868 | ||
cd19c364 | 869 | /** |
9afc5eee | 870 | * ns_to_old_timeval32 - Compat version of ns_to_timeval |
cd19c364 FW |
871 | * @nsec: the nanoseconds value to be converted |
872 | * | |
9afc5eee | 873 | * Returns the old_timeval32 representation of the nsec parameter. |
cd19c364 | 874 | */ |
9afc5eee | 875 | static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) |
cd19c364 | 876 | { |
693737b6 | 877 | struct __kernel_old_timeval tv; |
9afc5eee | 878 | struct old_timeval32 ctv; |
cd19c364 | 879 | |
693737b6 | 880 | tv = ns_to_kernel_old_timeval(nsec); |
cd19c364 FW |
881 | ctv.tv_sec = tv.tv_sec; |
882 | ctv.tv_usec = tv.tv_usec; | |
883 | ||
884 | return ctv; | |
885 | } | |
886 | ||
9b54bf9d MR |
887 | /* |
888 | * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) | |
889 | * directly. Instead, use one of the functions which work equivalently, such | |
890 | * as the kcompat_sys_xyzyyz() functions prototyped below. | |
891 | */ | |
892 | ||
893 | int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, | |
894 | struct compat_statfs64 __user * buf); | |
895 | int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, | |
896 | struct compat_statfs64 __user * buf); | |
897 | ||
cd19c364 | 898 | #else /* !CONFIG_COMPAT */ |
3c761ea0 LT |
899 | |
900 | #define is_compat_task() (0) | |
a846446b DS |
901 | /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ |
902 | #define in_compat_syscall in_compat_syscall | |
5180e3e2 | 903 | static inline bool in_compat_syscall(void) { return false; } |
3c761ea0 | 904 | |
1da177e4 | 905 | #endif /* CONFIG_COMPAT */ |
5180e3e2 | 906 | |
527c4125 CH |
907 | /* |
908 | * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit | |
909 | * types, and will need special compat treatment for that. Most architectures | |
910 | * don't need that special handling even for compat syscalls. | |
911 | */ | |
912 | #ifndef compat_need_64bit_alignment_fixup | |
913 | #define compat_need_64bit_alignment_fixup() false | |
914 | #endif | |
915 | ||
202bf8d7 AB |
916 | /* |
917 | * A pointer passed in from user mode. This should not | |
918 | * be used for syscall parameters, just declare them | |
919 | * as pointers because the syscall entry code will have | |
920 | * appropriately converted them already. | |
921 | */ | |
922 | #ifndef compat_ptr | |
923 | static inline void __user *compat_ptr(compat_uptr_t uptr) | |
924 | { | |
925 | return (void __user *)(unsigned long)uptr; | |
926 | } | |
927 | #endif | |
928 | ||
929 | static inline compat_uptr_t ptr_to_compat(void __user *uptr) | |
930 | { | |
931 | return (u32)(unsigned long)uptr; | |
932 | } | |
933 | ||
1da177e4 | 934 | #endif /* _LINUX_COMPAT_H */ |