Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/s390x/kernel/linux32.c | |
3 | * | |
4 | * S390 version | |
5 | * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
6 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), | |
7 | * Gerhard Tonn (ton@de.ibm.com) | |
8 | * Thomas Spatzier (tspat@de.ibm.com) | |
9 | * | |
10 | * Conversion between 31bit and 64bit native syscalls. | |
11 | * | |
12 | * Heavily inspired by the 32-bit Sparc compat code which is | |
13 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
14 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
15 | * | |
16 | */ | |
17 | ||
18 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/sched.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/file.h> | |
24 | #include <linux/signal.h> | |
25 | #include <linux/resource.h> | |
26 | #include <linux/times.h> | |
1da177e4 | 27 | #include <linux/smp.h> |
1da177e4 LT |
28 | #include <linux/sem.h> |
29 | #include <linux/msg.h> | |
30 | #include <linux/shm.h> | |
1da177e4 | 31 | #include <linux/uio.h> |
1da177e4 LT |
32 | #include <linux/quota.h> |
33 | #include <linux/module.h> | |
1da177e4 LT |
34 | #include <linux/poll.h> |
35 | #include <linux/personality.h> | |
36 | #include <linux/stat.h> | |
37 | #include <linux/filter.h> | |
38 | #include <linux/highmem.h> | |
39 | #include <linux/highuid.h> | |
40 | #include <linux/mman.h> | |
41 | #include <linux/ipv6.h> | |
42 | #include <linux/in.h> | |
43 | #include <linux/icmpv6.h> | |
44 | #include <linux/syscalls.h> | |
45 | #include <linux/sysctl.h> | |
46 | #include <linux/binfmts.h> | |
a9415644 | 47 | #include <linux/capability.h> |
1da177e4 LT |
48 | #include <linux/compat.h> |
49 | #include <linux/vfs.h> | |
50 | #include <linux/ptrace.h> | |
068e1b94 | 51 | #include <linux/fadvise.h> |
cba4fbbf | 52 | #include <linux/ipc.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
1da177e4 LT |
54 | |
55 | #include <asm/types.h> | |
1da177e4 | 56 | #include <asm/uaccess.h> |
1da177e4 LT |
57 | |
58 | #include <net/scm.h> | |
59 | #include <net/sock.h> | |
60 | ||
61 | #include "compat_linux.h" | |
62 | ||
b50511e4 MS |
63 | u32 psw32_user_bits = PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | |
64 | PSW32_DEFAULT_KEY | PSW32_MASK_BASE | PSW32_MASK_MCHECK | | |
65 | PSW32_MASK_PSTATE | PSW32_ASC_HOME; | |
1da177e4 LT |
66 | |
67 | /* For this source file, we want overflow handling. */ | |
68 | ||
69 | #undef high2lowuid | |
70 | #undef high2lowgid | |
71 | #undef low2highuid | |
72 | #undef low2highgid | |
73 | #undef SET_UID16 | |
74 | #undef SET_GID16 | |
75 | #undef NEW_TO_OLD_UID | |
76 | #undef NEW_TO_OLD_GID | |
77 | #undef SET_OLDSTAT_UID | |
78 | #undef SET_OLDSTAT_GID | |
79 | #undef SET_STAT_UID | |
80 | #undef SET_STAT_GID | |
81 | ||
82 | #define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid) | |
83 | #define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid) | |
84 | #define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid) | |
85 | #define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid) | |
86 | #define SET_UID16(var, uid) var = high2lowuid(uid) | |
87 | #define SET_GID16(var, gid) var = high2lowgid(gid) | |
88 | #define NEW_TO_OLD_UID(uid) high2lowuid(uid) | |
89 | #define NEW_TO_OLD_GID(gid) high2lowgid(gid) | |
90 | #define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
91 | #define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
92 | #define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
93 | #define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
94 | ||
24954a14 | 95 | asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group) |
1da177e4 LT |
96 | { |
97 | return sys_chown(filename, low2highuid(user), low2highgid(group)); | |
98 | } | |
99 | ||
24954a14 | 100 | asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group) |
1da177e4 LT |
101 | { |
102 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); | |
103 | } | |
104 | ||
105 | asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group) | |
106 | { | |
107 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); | |
108 | } | |
109 | ||
110 | asmlinkage long sys32_setregid16(u16 rgid, u16 egid) | |
111 | { | |
112 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); | |
113 | } | |
114 | ||
115 | asmlinkage long sys32_setgid16(u16 gid) | |
116 | { | |
117 | return sys_setgid((gid_t)gid); | |
118 | } | |
119 | ||
120 | asmlinkage long sys32_setreuid16(u16 ruid, u16 euid) | |
121 | { | |
122 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); | |
123 | } | |
124 | ||
125 | asmlinkage long sys32_setuid16(u16 uid) | |
126 | { | |
127 | return sys_setuid((uid_t)uid); | |
128 | } | |
129 | ||
130 | asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid) | |
131 | { | |
132 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), | |
133 | low2highuid(suid)); | |
134 | } | |
135 | ||
24954a14 | 136 | asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid) |
1da177e4 LT |
137 | { |
138 | int retval; | |
139 | ||
b6dff3ec DH |
140 | if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) && |
141 | !(retval = put_user(high2lowuid(current->cred->euid), euid))) | |
142 | retval = put_user(high2lowuid(current->cred->suid), suid); | |
1da177e4 LT |
143 | |
144 | return retval; | |
145 | } | |
146 | ||
147 | asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid) | |
148 | { | |
149 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), | |
150 | low2highgid(sgid)); | |
151 | } | |
152 | ||
24954a14 | 153 | asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid) |
1da177e4 LT |
154 | { |
155 | int retval; | |
156 | ||
b6dff3ec DH |
157 | if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) && |
158 | !(retval = put_user(high2lowgid(current->cred->egid), egid))) | |
159 | retval = put_user(high2lowgid(current->cred->sgid), sgid); | |
1da177e4 LT |
160 | |
161 | return retval; | |
162 | } | |
163 | ||
164 | asmlinkage long sys32_setfsuid16(u16 uid) | |
165 | { | |
166 | return sys_setfsuid((uid_t)uid); | |
167 | } | |
168 | ||
169 | asmlinkage long sys32_setfsgid16(u16 gid) | |
170 | { | |
171 | return sys_setfsgid((gid_t)gid); | |
172 | } | |
173 | ||
24954a14 | 174 | static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info) |
1da177e4 LT |
175 | { |
176 | int i; | |
177 | u16 group; | |
178 | ||
179 | for (i = 0; i < group_info->ngroups; i++) { | |
180 | group = (u16)GROUP_AT(group_info, i); | |
181 | if (put_user(group, grouplist+i)) | |
182 | return -EFAULT; | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
24954a14 | 188 | static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist) |
1da177e4 LT |
189 | { |
190 | int i; | |
191 | u16 group; | |
192 | ||
193 | for (i = 0; i < group_info->ngroups; i++) { | |
194 | if (get_user(group, grouplist+i)) | |
195 | return -EFAULT; | |
196 | GROUP_AT(group_info, i) = (gid_t)group; | |
197 | } | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
24954a14 | 202 | asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist) |
1da177e4 LT |
203 | { |
204 | int i; | |
205 | ||
206 | if (gidsetsize < 0) | |
207 | return -EINVAL; | |
208 | ||
b6dff3ec DH |
209 | get_group_info(current->cred->group_info); |
210 | i = current->cred->group_info->ngroups; | |
1da177e4 LT |
211 | if (gidsetsize) { |
212 | if (i > gidsetsize) { | |
213 | i = -EINVAL; | |
214 | goto out; | |
215 | } | |
b6dff3ec | 216 | if (groups16_to_user(grouplist, current->cred->group_info)) { |
1da177e4 LT |
217 | i = -EFAULT; |
218 | goto out; | |
219 | } | |
220 | } | |
221 | out: | |
b6dff3ec | 222 | put_group_info(current->cred->group_info); |
1da177e4 LT |
223 | return i; |
224 | } | |
225 | ||
24954a14 | 226 | asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist) |
1da177e4 LT |
227 | { |
228 | struct group_info *group_info; | |
229 | int retval; | |
230 | ||
231 | if (!capable(CAP_SETGID)) | |
232 | return -EPERM; | |
233 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
234 | return -EINVAL; | |
235 | ||
236 | group_info = groups_alloc(gidsetsize); | |
237 | if (!group_info) | |
238 | return -ENOMEM; | |
239 | retval = groups16_from_user(group_info, grouplist); | |
240 | if (retval) { | |
241 | put_group_info(group_info); | |
242 | return retval; | |
243 | } | |
244 | ||
245 | retval = set_current_groups(group_info); | |
246 | put_group_info(group_info); | |
247 | ||
248 | return retval; | |
249 | } | |
250 | ||
251 | asmlinkage long sys32_getuid16(void) | |
252 | { | |
b6dff3ec | 253 | return high2lowuid(current->cred->uid); |
1da177e4 LT |
254 | } |
255 | ||
256 | asmlinkage long sys32_geteuid16(void) | |
257 | { | |
b6dff3ec | 258 | return high2lowuid(current->cred->euid); |
1da177e4 LT |
259 | } |
260 | ||
261 | asmlinkage long sys32_getgid16(void) | |
262 | { | |
b6dff3ec | 263 | return high2lowgid(current->cred->gid); |
1da177e4 LT |
264 | } |
265 | ||
266 | asmlinkage long sys32_getegid16(void) | |
267 | { | |
b6dff3ec | 268 | return high2lowgid(current->cred->egid); |
1da177e4 LT |
269 | } |
270 | ||
1da177e4 LT |
271 | /* |
272 | * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation. | |
273 | * | |
274 | * This is really horribly ugly. | |
275 | */ | |
1df23957 | 276 | #ifdef CONFIG_SYSVIPC |
1da177e4 LT |
277 | asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr) |
278 | { | |
279 | if (call >> 16) /* hack for backward compatibility */ | |
280 | return -EINVAL; | |
1da177e4 LT |
281 | switch (call) { |
282 | case SEMTIMEDOP: | |
283 | return compat_sys_semtimedop(first, compat_ptr(ptr), | |
284 | second, compat_ptr(third)); | |
285 | case SEMOP: | |
286 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
287 | return sys_semtimedop(first, compat_ptr(ptr), | |
288 | second, NULL); | |
289 | case SEMGET: | |
290 | return sys_semget(first, second, third); | |
291 | case SEMCTL: | |
292 | return compat_sys_semctl(first, second, third, | |
293 | compat_ptr(ptr)); | |
294 | case MSGSND: | |
295 | return compat_sys_msgsnd(first, second, third, | |
296 | compat_ptr(ptr)); | |
297 | case MSGRCV: | |
298 | return compat_sys_msgrcv(first, second, 0, third, | |
299 | 0, compat_ptr(ptr)); | |
300 | case MSGGET: | |
301 | return sys_msgget((key_t) first, second); | |
302 | case MSGCTL: | |
303 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
304 | case SHMAT: | |
305 | return compat_sys_shmat(first, second, third, | |
306 | 0, compat_ptr(ptr)); | |
307 | case SHMDT: | |
308 | return sys_shmdt(compat_ptr(ptr)); | |
309 | case SHMGET: | |
310 | return sys_shmget(first, (unsigned)second, third); | |
311 | case SHMCTL: | |
312 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
313 | } | |
314 | ||
315 | return -ENOSYS; | |
316 | } | |
1df23957 | 317 | #endif |
1da177e4 | 318 | |
24954a14 | 319 | asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) |
1da177e4 LT |
320 | { |
321 | if ((int)high < 0) | |
322 | return -EINVAL; | |
323 | else | |
324 | return sys_truncate(path, (high << 32) | low); | |
325 | } | |
326 | ||
327 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) | |
328 | { | |
329 | if ((int)high < 0) | |
330 | return -EINVAL; | |
331 | else | |
332 | return sys_ftruncate(fd, (high << 32) | low); | |
333 | } | |
334 | ||
1da177e4 LT |
335 | asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid, |
336 | struct compat_timespec __user *interval) | |
337 | { | |
338 | struct timespec t; | |
339 | int ret; | |
340 | mm_segment_t old_fs = get_fs (); | |
341 | ||
342 | set_fs (KERNEL_DS); | |
2b67fc46 HC |
343 | ret = sys_sched_rr_get_interval(pid, |
344 | (struct timespec __force __user *) &t); | |
1da177e4 LT |
345 | set_fs (old_fs); |
346 | if (put_compat_timespec(&t, interval)) | |
347 | return -EFAULT; | |
348 | return ret; | |
349 | } | |
350 | ||
351 | asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, | |
352 | compat_sigset_t __user *oset, size_t sigsetsize) | |
353 | { | |
354 | sigset_t s; | |
355 | compat_sigset_t s32; | |
356 | int ret; | |
357 | mm_segment_t old_fs = get_fs(); | |
358 | ||
359 | if (set) { | |
360 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) | |
361 | return -EFAULT; | |
399c1d8d | 362 | s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); |
1da177e4 LT |
363 | } |
364 | set_fs (KERNEL_DS); | |
d2c993d8 | 365 | ret = sys_rt_sigprocmask(how, |
2b67fc46 HC |
366 | set ? (sigset_t __force __user *) &s : NULL, |
367 | oset ? (sigset_t __force __user *) &s : NULL, | |
d2c993d8 | 368 | sigsetsize); |
1da177e4 LT |
369 | set_fs (old_fs); |
370 | if (ret) return ret; | |
371 | if (oset) { | |
399c1d8d MS |
372 | s32.sig[1] = (s.sig[0] >> 32); |
373 | s32.sig[0] = s.sig[0]; | |
1da177e4 LT |
374 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) |
375 | return -EFAULT; | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
380 | asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, | |
381 | size_t sigsetsize) | |
382 | { | |
383 | sigset_t s; | |
384 | compat_sigset_t s32; | |
385 | int ret; | |
386 | mm_segment_t old_fs = get_fs(); | |
387 | ||
388 | set_fs (KERNEL_DS); | |
2b67fc46 | 389 | ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize); |
1da177e4 LT |
390 | set_fs (old_fs); |
391 | if (!ret) { | |
399c1d8d MS |
392 | s32.sig[1] = (s.sig[0] >> 32); |
393 | s32.sig[0] = s.sig[0]; | |
1da177e4 LT |
394 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) |
395 | return -EFAULT; | |
396 | } | |
397 | return ret; | |
398 | } | |
399 | ||
400 | asmlinkage long | |
401 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
402 | { | |
403 | siginfo_t info; | |
404 | int ret; | |
405 | mm_segment_t old_fs = get_fs(); | |
406 | ||
407 | if (copy_siginfo_from_user32(&info, uinfo)) | |
408 | return -EFAULT; | |
409 | set_fs (KERNEL_DS); | |
2b67fc46 | 410 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info); |
1da177e4 LT |
411 | set_fs (old_fs); |
412 | return ret; | |
413 | } | |
414 | ||
415 | /* | |
416 | * sys32_execve() executes a new program after the asm stub has set | |
417 | * things up for us. This should basically do what I want it to. | |
418 | */ | |
c7887325 | 419 | asmlinkage long sys32_execve(const char __user *name, compat_uptr_t __user *argv, |
3e86a8c6 | 420 | compat_uptr_t __user *envp) |
1da177e4 | 421 | { |
03ff9a23 MS |
422 | struct pt_regs *regs = task_pt_regs(current); |
423 | char *filename; | |
3e86a8c6 HC |
424 | long rc; |
425 | ||
426 | filename = getname(name); | |
427 | rc = PTR_ERR(filename); | |
428 | if (IS_ERR(filename)) | |
429 | return rc; | |
430 | rc = compat_do_execve(filename, argv, envp, regs); | |
431 | if (rc) | |
432 | goto out; | |
03ff9a23 MS |
433 | current->thread.fp_regs.fpc=0; |
434 | asm volatile("sfpc %0,0" : : "d" (0)); | |
3e86a8c6 | 435 | rc = regs->gprs[2]; |
1da177e4 | 436 | out: |
3e86a8c6 HC |
437 | putname(filename); |
438 | return rc; | |
1da177e4 LT |
439 | } |
440 | ||
24954a14 | 441 | asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf, |
1da177e4 LT |
442 | size_t count, u32 poshi, u32 poslo) |
443 | { | |
444 | if ((compat_ssize_t) count < 0) | |
445 | return -EINVAL; | |
446 | return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
447 | } | |
448 | ||
24954a14 | 449 | asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf, |
1da177e4 LT |
450 | size_t count, u32 poshi, u32 poslo) |
451 | { | |
452 | if ((compat_ssize_t) count < 0) | |
453 | return -EINVAL; | |
454 | return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
455 | } | |
456 | ||
457 | asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count) | |
458 | { | |
459 | return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count); | |
460 | } | |
461 | ||
24954a14 | 462 | asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count) |
1da177e4 LT |
463 | { |
464 | mm_segment_t old_fs = get_fs(); | |
465 | int ret; | |
466 | off_t of; | |
467 | ||
468 | if (offset && get_user(of, offset)) | |
469 | return -EFAULT; | |
470 | ||
471 | set_fs(KERNEL_DS); | |
d2c993d8 | 472 | ret = sys_sendfile(out_fd, in_fd, |
2b67fc46 | 473 | offset ? (off_t __force __user *) &of : NULL, count); |
1da177e4 LT |
474 | set_fs(old_fs); |
475 | ||
83b942bd | 476 | if (offset && put_user(of, offset)) |
1da177e4 LT |
477 | return -EFAULT; |
478 | ||
479 | return ret; | |
480 | } | |
481 | ||
482 | asmlinkage long sys32_sendfile64(int out_fd, int in_fd, | |
24954a14 | 483 | compat_loff_t __user *offset, s32 count) |
1da177e4 LT |
484 | { |
485 | mm_segment_t old_fs = get_fs(); | |
486 | int ret; | |
487 | loff_t lof; | |
488 | ||
489 | if (offset && get_user(lof, offset)) | |
490 | return -EFAULT; | |
491 | ||
492 | set_fs(KERNEL_DS); | |
d2c993d8 | 493 | ret = sys_sendfile64(out_fd, in_fd, |
2b67fc46 HC |
494 | offset ? (loff_t __force __user *) &lof : NULL, |
495 | count); | |
1da177e4 LT |
496 | set_fs(old_fs); |
497 | ||
498 | if (offset && put_user(lof, offset)) | |
499 | return -EFAULT; | |
500 | ||
501 | return ret; | |
502 | } | |
503 | ||
1da177e4 LT |
504 | struct stat64_emu31 { |
505 | unsigned long long st_dev; | |
506 | unsigned int __pad1; | |
507 | #define STAT64_HAS_BROKEN_ST_INO 1 | |
508 | u32 __st_ino; | |
509 | unsigned int st_mode; | |
510 | unsigned int st_nlink; | |
511 | u32 st_uid; | |
512 | u32 st_gid; | |
513 | unsigned long long st_rdev; | |
514 | unsigned int __pad3; | |
515 | long st_size; | |
516 | u32 st_blksize; | |
517 | unsigned char __pad4[4]; | |
518 | u32 __pad5; /* future possible st_blocks high bits */ | |
519 | u32 st_blocks; /* Number 512-byte blocks allocated. */ | |
520 | u32 st_atime; | |
521 | u32 __pad6; | |
522 | u32 st_mtime; | |
523 | u32 __pad7; | |
524 | u32 st_ctime; | |
525 | u32 __pad8; /* will be high 32 bits of ctime someday */ | |
526 | unsigned long st_ino; | |
527 | }; | |
528 | ||
24954a14 | 529 | static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat) |
1da177e4 LT |
530 | { |
531 | struct stat64_emu31 tmp; | |
532 | ||
533 | memset(&tmp, 0, sizeof(tmp)); | |
534 | ||
535 | tmp.st_dev = huge_encode_dev(stat->dev); | |
536 | tmp.st_ino = stat->ino; | |
537 | tmp.__st_ino = (u32)stat->ino; | |
538 | tmp.st_mode = stat->mode; | |
539 | tmp.st_nlink = (unsigned int)stat->nlink; | |
540 | tmp.st_uid = stat->uid; | |
541 | tmp.st_gid = stat->gid; | |
542 | tmp.st_rdev = huge_encode_dev(stat->rdev); | |
543 | tmp.st_size = stat->size; | |
544 | tmp.st_blksize = (u32)stat->blksize; | |
545 | tmp.st_blocks = (u32)stat->blocks; | |
546 | tmp.st_atime = (u32)stat->atime.tv_sec; | |
547 | tmp.st_mtime = (u32)stat->mtime.tv_sec; | |
548 | tmp.st_ctime = (u32)stat->ctime.tv_sec; | |
549 | ||
550 | return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; | |
551 | } | |
552 | ||
c7887325 | 553 | asmlinkage long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
554 | { |
555 | struct kstat stat; | |
556 | int ret = vfs_stat(filename, &stat); | |
557 | if (!ret) | |
558 | ret = cp_stat64(statbuf, &stat); | |
559 | return ret; | |
560 | } | |
561 | ||
c7887325 | 562 | asmlinkage long sys32_lstat64(const char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
563 | { |
564 | struct kstat stat; | |
565 | int ret = vfs_lstat(filename, &stat); | |
566 | if (!ret) | |
567 | ret = cp_stat64(statbuf, &stat); | |
568 | return ret; | |
569 | } | |
570 | ||
24954a14 | 571 | asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
572 | { |
573 | struct kstat stat; | |
574 | int ret = vfs_fstat(fd, &stat); | |
575 | if (!ret) | |
576 | ret = cp_stat64(statbuf, &stat); | |
577 | return ret; | |
578 | } | |
579 | ||
c7887325 | 580 | asmlinkage long sys32_fstatat64(unsigned int dfd, const char __user *filename, |
ed3d021b | 581 | struct stat64_emu31 __user* statbuf, int flag) |
19bf9cbf HC |
582 | { |
583 | struct kstat stat; | |
0112fc22 | 584 | int error; |
19bf9cbf | 585 | |
0112fc22 OD |
586 | error = vfs_fstatat(dfd, filename, &stat, flag); |
587 | if (error) | |
588 | return error; | |
589 | return cp_stat64(statbuf, &stat); | |
19bf9cbf HC |
590 | } |
591 | ||
1da177e4 LT |
592 | /* |
593 | * Linux/i386 didn't use to be able to handle more than | |
594 | * 4 system call parameters, so these system calls used a memory | |
595 | * block for parameter passing.. | |
596 | */ | |
597 | ||
598 | struct mmap_arg_struct_emu31 { | |
d3815898 HC |
599 | compat_ulong_t addr; |
600 | compat_ulong_t len; | |
601 | compat_ulong_t prot; | |
602 | compat_ulong_t flags; | |
603 | compat_ulong_t fd; | |
604 | compat_ulong_t offset; | |
1da177e4 LT |
605 | }; |
606 | ||
d3815898 | 607 | asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
608 | { |
609 | struct mmap_arg_struct_emu31 a; | |
1da177e4 LT |
610 | |
611 | if (copy_from_user(&a, arg, sizeof(a))) | |
d3815898 | 612 | return -EFAULT; |
1da177e4 | 613 | if (a.offset & ~PAGE_MASK) |
d3815898 HC |
614 | return -EINVAL; |
615 | a.addr = (unsigned long) compat_ptr(a.addr); | |
616 | return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, | |
617 | a.offset >> PAGE_SHIFT); | |
1da177e4 LT |
618 | } |
619 | ||
d3815898 | 620 | asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
621 | { |
622 | struct mmap_arg_struct_emu31 a; | |
1da177e4 LT |
623 | |
624 | if (copy_from_user(&a, arg, sizeof(a))) | |
d3815898 HC |
625 | return -EFAULT; |
626 | a.addr = (unsigned long) compat_ptr(a.addr); | |
627 | return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); | |
1da177e4 LT |
628 | } |
629 | ||
24954a14 | 630 | asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
631 | { |
632 | if ((compat_ssize_t) count < 0) | |
633 | return -EINVAL; | |
634 | ||
635 | return sys_read(fd, buf, count); | |
636 | } | |
637 | ||
c7887325 | 638 | asmlinkage long sys32_write(unsigned int fd, const char __user * buf, size_t count) |
1da177e4 LT |
639 | { |
640 | if ((compat_ssize_t) count < 0) | |
641 | return -EINVAL; | |
642 | ||
643 | return sys_write(fd, buf, count); | |
644 | } | |
645 | ||
068e1b94 MS |
646 | /* |
647 | * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64. | |
648 | * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE} | |
649 | * because the 31 bit values differ from the 64 bit values. | |
650 | */ | |
651 | ||
652 | asmlinkage long | |
653 | sys32_fadvise64(int fd, loff_t offset, size_t len, int advise) | |
654 | { | |
655 | if (advise == 4) | |
656 | advise = POSIX_FADV_DONTNEED; | |
657 | else if (advise == 5) | |
658 | advise = POSIX_FADV_NOREUSE; | |
659 | return sys_fadvise64(fd, offset, len, advise); | |
660 | } | |
661 | ||
662 | struct fadvise64_64_args { | |
663 | int fd; | |
664 | long long offset; | |
665 | long long len; | |
666 | int advice; | |
667 | }; | |
668 | ||
669 | asmlinkage long | |
670 | sys32_fadvise64_64(struct fadvise64_64_args __user *args) | |
671 | { | |
672 | struct fadvise64_64_args a; | |
673 | ||
674 | if ( copy_from_user(&a, args, sizeof(a)) ) | |
675 | return -EFAULT; | |
676 | if (a.advice == 4) | |
677 | a.advice = POSIX_FADV_DONTNEED; | |
678 | else if (a.advice == 5) | |
679 | a.advice = POSIX_FADV_NOREUSE; | |
680 | return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); | |
681 | } |