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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> | |
23 | #include <asm/siginfo.h> | |
3f2e05e9 | 24 | #include <asm/signal.h> |
1da177e4 | 25 | |
7303e30e DB |
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 | ||
45e87781 L |
37 | #ifndef COMPAT_USE_64BIT_TIME |
38 | #define COMPAT_USE_64BIT_TIME 0 | |
39 | #endif | |
40 | ||
46836613 | 41 | #ifndef __SC_DELOUSE |
4f59c718 | 42 | #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) |
46836613 AV |
43 | #endif |
44 | ||
7303e30e | 45 | #ifndef COMPAT_SYSCALL_DEFINE0 |
217f4433 | 46 | #define COMPAT_SYSCALL_DEFINE0(name) \ |
c9a21195 HM |
47 | asmlinkage long compat_sys_##name(void); \ |
48 | ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ | |
217f4433 | 49 | asmlinkage long compat_sys_##name(void) |
7303e30e | 50 | #endif /* COMPAT_SYSCALL_DEFINE0 */ |
217f4433 | 51 | |
46836613 AV |
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 | ||
5ac9efa3 DB |
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 | */ | |
7303e30e | 70 | #ifndef COMPAT_SYSCALL_DEFINEx |
5ac9efa3 | 71 | #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ |
bee20031 AB |
72 | __diag_push(); \ |
73 | __diag_ignore(GCC, 8, "-Wattribute-alias", \ | |
74 | "Type aliasing is used to sanitize syscall arguments");\ | |
5ac9efa3 DB |
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 | { \ | |
bee20031 AB |
82 | long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ |
83 | __MAP(x,__SC_TEST,__VA_ARGS__); \ | |
84 | return ret; \ | |
5ac9efa3 | 85 | } \ |
bee20031 | 86 | __diag_pop(); \ |
5ac9efa3 | 87 | static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) |
7303e30e | 88 | #endif /* COMPAT_SYSCALL_DEFINEx */ |
46836613 | 89 | |
bfdc5970 CH |
90 | struct compat_iovec { |
91 | compat_uptr_t iov_base; | |
92 | compat_size_t iov_len; | |
93 | }; | |
94 | ||
9b064fc3 AV |
95 | #ifndef compat_user_stack_pointer |
96 | #define compat_user_stack_pointer() current_user_stack_pointer() | |
97 | #endif | |
90268439 AV |
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 | |
22839869 WD |
105 | #ifndef COMPAT_MINSIGSTKSZ |
106 | #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ | |
107 | #endif | |
90268439 | 108 | |
1da177e4 LT |
109 | #define compat_jiffies_to_clock_t(x) \ |
110 | (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) | |
111 | ||
202e5979 SR |
112 | typedef __compat_uid32_t compat_uid_t; |
113 | typedef __compat_gid32_t compat_gid_t; | |
114 | ||
5d0e5283 | 115 | struct compat_sel_arg_struct; |
1da177e4 LT |
116 | struct rusage; |
117 | ||
c1745f84 | 118 | struct old_itimerval32; |
54ad9c46 | 119 | |
1da177e4 LT |
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 | ||
b772434b | 133 | int set_compat_user_sigmask(const compat_sigset_t __user *umask, |
ded653cc DD |
134 | size_t sigsetsize); |
135 | ||
08d32fe5 | 136 | struct compat_sigaction { |
2a148698 | 137 | #ifndef __ARCH_HAS_IRIX_SIGACTION |
08d32fe5 AV |
138 | compat_uptr_t sa_handler; |
139 | compat_ulong_t sa_flags; | |
140 | #else | |
2a148698 | 141 | compat_uint_t sa_flags; |
08d32fe5 AV |
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 | }; | |
08d32fe5 | 149 | |
b713da69 AV |
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. */ | |
8420f719 EB |
211 | #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ |
212 | sizeof(short) : __alignof__(compat_uptr_t)) | |
b713da69 | 213 | union { |
add0b32e EB |
214 | /* used on alpha and sparc */ |
215 | int _trapno; /* TRAP # which caused the signal */ | |
b68a68d3 EB |
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. */ | |
b713da69 AV |
221 | /* used when si_code=SEGV_BNDERR */ |
222 | struct { | |
8420f719 | 223 | char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; |
b713da69 AV |
224 | compat_uptr_t _lower; |
225 | compat_uptr_t _upper; | |
226 | } _addr_bnd; | |
227 | /* used when si_code=SEGV_PKUERR */ | |
b68a68d3 | 228 | struct { |
8420f719 | 229 | char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; |
b68a68d3 EB |
230 | u32 _pkey; |
231 | } _addr_pkey; | |
fb6cc127 | 232 | /* used when si_code=TRAP_PERF */ |
0683b531 EB |
233 | struct { |
234 | compat_ulong_t _data; | |
235 | u32 _type; | |
78ed93d7 | 236 | u32 _flags; |
0683b531 | 237 | } _perf; |
b713da69 AV |
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 | ||
1da177e4 LT |
255 | struct compat_rlimit { |
256 | compat_ulong_t rlim_cur; | |
257 | compat_ulong_t rlim_max; | |
258 | }; | |
259 | ||
3ce0f237 CH |
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 | ||
1da177e4 | 291 | struct compat_rusage { |
9afc5eee AB |
292 | struct old_timeval32 ru_utime; |
293 | struct old_timeval32 ru_stime; | |
1da177e4 LT |
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 | ||
4800a5bb CM |
310 | extern int put_compat_rusage(const struct rusage *, |
311 | struct compat_rusage __user *); | |
1da177e4 LT |
312 | |
313 | struct compat_siginfo; | |
7a074e96 | 314 | struct __compat_aio_sigset; |
1da177e4 | 315 | |
1da177e4 LT |
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 | ||
2b1c6bd7 CH |
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 | ||
1da177e4 LT |
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 | ||
2dceba14 AB |
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 | ||
4800a5bb | 356 | struct compat_if_settings { |
7a50a240 AB |
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 | ||
2dceba14 | 362 | struct compat_ifreq { |
7a50a240 AB |
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 */ | |
2dceba14 | 377 | char ifru_newname[IFNAMSIZ]; |
7a50a240 AB |
378 | compat_caddr_t ifru_data; |
379 | struct compat_if_settings ifru_settings; | |
380 | } ifr_ifru; | |
2dceba14 AB |
381 | }; |
382 | ||
383 | struct compat_ifconf { | |
4800a5bb CM |
384 | compat_int_t ifc_len; /* size of buffer */ |
385 | compat_caddr_t ifcbuf; | |
2dceba14 AB |
386 | }; |
387 | ||
34f192c6 IM |
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 | ||
495dfbf7 AV |
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 | ||
f1c316a3 SM |
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 | ||
1a33b18b | 414 | struct compat_stat; |
be84cb43 CM |
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; | |
48b25c43 | 426 | struct compat_msgbuf; |
be84cb43 | 427 | |
c3b3f524 CH |
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 | |
1da177e4 LT |
437 | int get_compat_sigevent(struct sigevent *event, |
438 | const struct compat_sigevent __user *u_event); | |
439 | ||
3968cf62 | 440 | extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); |
fde9fc76 MR |
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) */ | |
1a33b18b | 451 | #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT) |
fde9fc76 MR |
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]; | |
df561f66 | 455 | fallthrough; |
fde9fc76 | 456 | case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; |
df561f66 | 457 | fallthrough; |
fde9fc76 | 458 | case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; |
df561f66 | 459 | fallthrough; |
fde9fc76 MR |
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 | } | |
bebfa101 | 467 | |
14026b94 CL |
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) | |
fb05121f CL |
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) | |
14026b94 CL |
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) | |
fb05121f CL |
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) | |
14026b94 CL |
533 | #endif |
534 | ||
032d82d9 RM |
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 | ||
c269f196 RM |
539 | extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, |
540 | compat_ulong_t addr, compat_ulong_t data); | |
c269f196 | 541 | |
c679a089 DB |
542 | struct epoll_event; /* fortunately, this one is fixed-layout */ |
543 | ||
c679a089 DB |
544 | int compat_restore_altstack(const compat_stack_t __user *uss); |
545 | int __compat_save_altstack(compat_stack_t __user *, unsigned long); | |
39f16c1c | 546 | #define unsafe_compat_save_altstack(uss, sp, label) do { \ |
c679a089 DB |
547 | compat_stack_t __user *__uss = uss; \ |
548 | struct task_struct *t = current; \ | |
39f16c1c AV |
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); \ | |
c679a089 DB |
553 | } while (0); |
554 | ||
f6dfb4fd | 555 | /* |
c679a089 | 556 | * These syscall function prototypes are kept in the same order as |
3e2052e5 DB |
557 | * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls |
558 | * go below. | |
c679a089 DB |
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. | |
7303e30e DB |
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. | |
f6dfb4fd | 567 | */ |
7303e30e | 568 | #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER |
c679a089 DB |
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); | |
7a074e96 CH |
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, | |
9afc5eee | 576 | struct old_timespec32 __user *timeout, |
7a074e96 | 577 | const struct __compat_aio_sigset __user *usig); |
7a35397f DD |
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); | |
c679a089 DB |
584 | |
585 | /* fs/cookies.c */ | |
586 | asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); | |
587 | ||
588 | /* fs/eventpoll.c */ | |
f6dfb4fd | 589 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
35280bd4 | 590 | struct epoll_event __user *events, |
f6dfb4fd DL |
591 | int maxevents, int timeout, |
592 | const compat_sigset_t __user *sigmask, | |
593 | compat_size_t sigsetsize); | |
b0a0c261 WB |
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); | |
f6dfb4fd | 600 | |
c679a089 DB |
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); | |
97416ce8 | 606 | |
c679a089 DB |
607 | /* fs/ioctl.c */ |
608 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
609 | compat_ulong_t arg); | |
140ff8b0 | 610 | |
c679a089 | 611 | /* fs/open.c */ |
be84cb43 CM |
612 | asmlinkage long compat_sys_statfs(const char __user *pathname, |
613 | struct compat_statfs __user *buf); | |
be84cb43 CM |
614 | asmlinkage long compat_sys_statfs64(const char __user *pathname, |
615 | compat_size_t sz, | |
616 | struct compat_statfs64 __user *buf); | |
c679a089 DB |
617 | asmlinkage long compat_sys_fstatfs(unsigned int fd, |
618 | struct compat_statfs __user *buf); | |
be84cb43 CM |
619 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, |
620 | struct compat_statfs64 __user *buf); | |
c679a089 DB |
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 */ | |
be84cb43 CM |
628 | asmlinkage long compat_sys_getdents(unsigned int fd, |
629 | struct compat_linux_dirent __user *dirent, | |
630 | unsigned int count); | |
c679a089 DB |
631 | |
632 | /* fs/read_write.c */ | |
633 | asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); | |
c679a089 DB |
634 | /* No generic prototype for pread64 and pwrite64 */ |
635 | asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, | |
3523a9d4 | 636 | const struct iovec __user *vec, |
c679a089 DB |
637 | compat_ulong_t vlen, u32 pos_low, u32 pos_high); |
638 | asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, | |
3523a9d4 | 639 | const struct iovec __user *vec, |
c679a089 DB |
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, | |
3523a9d4 | 643 | const struct iovec __user *vec, |
c679a089 DB |
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, | |
3523a9d4 | 649 | const struct iovec __user *vec, |
c679a089 DB |
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 */ | |
8dabe724 | 660 | asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, |
be84cb43 CM |
661 | compat_ulong_t __user *outp, |
662 | compat_ulong_t __user *exp, | |
9afc5eee | 663 | struct old_timespec32 __user *tsp, |
be84cb43 | 664 | void __user *sig); |
e024707b DD |
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); | |
8dabe724 | 670 | asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, |
be84cb43 | 671 | unsigned int nfds, |
9afc5eee | 672 | struct old_timespec32 __user *tsp, |
be84cb43 CM |
673 | const compat_sigset_t __user *sigmask, |
674 | compat_size_t sigsetsize); | |
8bd27a30 DD |
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); | |
c679a089 DB |
680 | |
681 | /* fs/signalfd.c */ | |
be84cb43 CM |
682 | asmlinkage long compat_sys_signalfd4(int ufd, |
683 | const compat_sigset_t __user *sigmask, | |
684 | compat_size_t sigsetsize, int flags); | |
be84cb43 | 685 | |
c679a089 DB |
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 | ||
c679a089 DB |
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 */ | |
c679a089 DB |
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 | ||
c679a089 | 711 | /* kernel/itimer.c */ |
be84cb43 | 712 | asmlinkage long compat_sys_getitimer(int which, |
c1745f84 | 713 | struct old_itimerval32 __user *it); |
be84cb43 | 714 | asmlinkage long compat_sys_setitimer(int which, |
c1745f84 AB |
715 | struct old_itimerval32 __user *in, |
716 | struct old_itimerval32 __user *out); | |
c679a089 DB |
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 */ | |
be84cb43 CM |
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); | |
c679a089 DB |
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); | |
c679a089 DB |
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); | |
be84cb43 CM |
744 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, |
745 | compat_size_t sigsetsize); | |
08d32fe5 | 746 | #ifndef CONFIG_ODD_RT_SIGACTION |
08d32fe5 AV |
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 | |
c679a089 DB |
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); | |
8dabe724 | 757 | asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, |
c679a089 | 758 | struct compat_siginfo __user *uinfo, |
9afc5eee | 759 | struct old_timespec32 __user *uts, compat_size_t sigsetsize); |
2367c4b5 AB |
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); | |
75907d4d AV |
763 | asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, |
764 | struct compat_siginfo __user *uinfo); | |
c679a089 DB |
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 */ | |
9afc5eee | 776 | asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, |
c679a089 | 777 | struct timezone __user *tz); |
9afc5eee | 778 | asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, |
c679a089 | 779 | struct timezone __user *tz); |
c679a089 DB |
780 | |
781 | /* kernel/timer.c */ | |
be84cb43 | 782 | asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); |
c679a089 DB |
783 | |
784 | /* ipc/mqueue.c */ | |
be84cb43 CM |
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); | |
c679a089 DB |
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); | |
4c696ba7 | 793 | |
c679a089 DB |
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); | |
c41d68a5 | 800 | |
c679a089 DB |
801 | /* ipc/sem.c */ |
802 | asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); | |
c679a089 DB |
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); | |
c679a089 DB |
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 */ | |
c41d68a5 | 818 | |
c679a089 DB |
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 */ | |
c679a089 DB |
830 | asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, |
831 | compat_pid_t pid, int sig, | |
832 | struct compat_siginfo __user *uinfo); | |
e11d4284 AB |
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); | |
8dabe724 | 836 | asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, |
c679a089 | 837 | unsigned vlen, unsigned int flags, |
9afc5eee | 838 | struct old_timespec32 __user *timeout); |
c679a089 DB |
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); | |
c679a089 DB |
847 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
848 | unsigned vlen, unsigned int flags); | |
c679a089 DB |
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, | |
3523a9d4 | 853 | const struct iovec __user *vec, |
c679a089 DB |
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, | |
3523a9d4 | 856 | const struct iovec __user *vec, |
c679a089 DB |
857 | compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); |
858 | #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 | |
576d0703 | 859 | asmlinkage long compat_sys_preadv64v2(unsigned long fd, |
3523a9d4 | 860 | const struct iovec __user *vec, |
c679a089 DB |
861 | unsigned long vlen, loff_t pos, rwf_t flags); |
862 | #endif | |
a67ba43d | 863 | |
c679a089 DB |
864 | #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 |
865 | asmlinkage long compat_sys_pwritev64v2(unsigned long fd, | |
3523a9d4 | 866 | const struct iovec __user *vec, |
c679a089 DB |
867 | unsigned long vlen, loff_t pos, rwf_t flags); |
868 | #endif | |
869 | ||
870 | ||
c679a089 DB |
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); | |
c679a089 DB |
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 */ | |
c679a089 DB |
892 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
893 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
9afc5eee | 894 | struct old_timeval32 __user *tvp); |
c679a089 DB |
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); | |
c679a089 DB |
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); | |
90268439 | 909 | |
c679a089 | 910 | /* obsolete: kernel/signal.c */ |
e9fb8b7e CM |
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 | |
c679a089 DB |
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 | |
e9fb8b7e | 924 | |
c679a089 DB |
925 | /* obsolete: net/socket.c */ |
926 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args); | |
5180e3e2 | 927 | |
59c10c52 GR |
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 | ||
7303e30e DB |
965 | #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ |
966 | ||
cd19c364 | 967 | /** |
9afc5eee | 968 | * ns_to_old_timeval32 - Compat version of ns_to_timeval |
cd19c364 FW |
969 | * @nsec: the nanoseconds value to be converted |
970 | * | |
9afc5eee | 971 | * Returns the old_timeval32 representation of the nsec parameter. |
cd19c364 | 972 | */ |
9afc5eee | 973 | static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) |
cd19c364 | 974 | { |
693737b6 | 975 | struct __kernel_old_timeval tv; |
9afc5eee | 976 | struct old_timeval32 ctv; |
cd19c364 | 977 | |
693737b6 | 978 | tv = ns_to_kernel_old_timeval(nsec); |
cd19c364 FW |
979 | ctv.tv_sec = tv.tv_sec; |
980 | ctv.tv_usec = tv.tv_usec; | |
981 | ||
982 | return ctv; | |
983 | } | |
984 | ||
9b54bf9d MR |
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 | ||
1a33b18b AB |
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 | ||
cd19c364 | 1007 | #else /* !CONFIG_COMPAT */ |
3c761ea0 LT |
1008 | |
1009 | #define is_compat_task() (0) | |
a846446b DS |
1010 | /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ |
1011 | #define in_compat_syscall in_compat_syscall | |
5180e3e2 | 1012 | static inline bool in_compat_syscall(void) { return false; } |
3c761ea0 | 1013 | |
1da177e4 | 1014 | #endif /* CONFIG_COMPAT */ |
5180e3e2 | 1015 | |
e130242d AB |
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 | ||
527c4125 CH |
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 | ||
202bf8d7 AB |
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 | 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 | ||
1da177e4 | 1052 | #endif /* _LINUX_COMPAT_H */ |