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> | |
27 | #include <linux/utsname.h> | |
1da177e4 LT |
28 | #include <linux/smp.h> |
29 | #include <linux/smp_lock.h> | |
30 | #include <linux/sem.h> | |
31 | #include <linux/msg.h> | |
32 | #include <linux/shm.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/uio.h> | |
35 | #include <linux/nfs_fs.h> | |
36 | #include <linux/quota.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/sunrpc/svc.h> | |
39 | #include <linux/nfsd/nfsd.h> | |
40 | #include <linux/nfsd/cache.h> | |
41 | #include <linux/nfsd/xdr.h> | |
42 | #include <linux/nfsd/syscall.h> | |
43 | #include <linux/poll.h> | |
44 | #include <linux/personality.h> | |
45 | #include <linux/stat.h> | |
46 | #include <linux/filter.h> | |
47 | #include <linux/highmem.h> | |
48 | #include <linux/highuid.h> | |
49 | #include <linux/mman.h> | |
50 | #include <linux/ipv6.h> | |
51 | #include <linux/in.h> | |
52 | #include <linux/icmpv6.h> | |
53 | #include <linux/syscalls.h> | |
54 | #include <linux/sysctl.h> | |
55 | #include <linux/binfmts.h> | |
a9415644 | 56 | #include <linux/capability.h> |
1da177e4 LT |
57 | #include <linux/compat.h> |
58 | #include <linux/vfs.h> | |
59 | #include <linux/ptrace.h> | |
068e1b94 | 60 | #include <linux/fadvise.h> |
cba4fbbf | 61 | #include <linux/ipc.h> |
1da177e4 LT |
62 | |
63 | #include <asm/types.h> | |
1da177e4 | 64 | #include <asm/uaccess.h> |
1da177e4 LT |
65 | |
66 | #include <net/scm.h> | |
67 | #include <net/sock.h> | |
68 | ||
69 | #include "compat_linux.h" | |
70 | ||
c1821c2e GS |
71 | long psw_user32_bits = (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | |
72 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
73 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); | |
74 | long psw32_user_bits = (PSW32_BASE_BITS | PSW32_MASK_DAT | PSW32_ASC_HOME | | |
75 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
76 | PSW32_MASK_PSTATE); | |
1da177e4 LT |
77 | |
78 | /* For this source file, we want overflow handling. */ | |
79 | ||
80 | #undef high2lowuid | |
81 | #undef high2lowgid | |
82 | #undef low2highuid | |
83 | #undef low2highgid | |
84 | #undef SET_UID16 | |
85 | #undef SET_GID16 | |
86 | #undef NEW_TO_OLD_UID | |
87 | #undef NEW_TO_OLD_GID | |
88 | #undef SET_OLDSTAT_UID | |
89 | #undef SET_OLDSTAT_GID | |
90 | #undef SET_STAT_UID | |
91 | #undef SET_STAT_GID | |
92 | ||
93 | #define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid) | |
94 | #define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid) | |
95 | #define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid) | |
96 | #define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid) | |
97 | #define SET_UID16(var, uid) var = high2lowuid(uid) | |
98 | #define SET_GID16(var, gid) var = high2lowgid(gid) | |
99 | #define NEW_TO_OLD_UID(uid) high2lowuid(uid) | |
100 | #define NEW_TO_OLD_GID(gid) high2lowgid(gid) | |
101 | #define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
102 | #define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
103 | #define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
104 | #define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
105 | ||
24954a14 | 106 | asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group) |
1da177e4 LT |
107 | { |
108 | return sys_chown(filename, low2highuid(user), low2highgid(group)); | |
109 | } | |
110 | ||
24954a14 | 111 | asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group) |
1da177e4 LT |
112 | { |
113 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); | |
114 | } | |
115 | ||
116 | asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group) | |
117 | { | |
118 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); | |
119 | } | |
120 | ||
121 | asmlinkage long sys32_setregid16(u16 rgid, u16 egid) | |
122 | { | |
123 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); | |
124 | } | |
125 | ||
126 | asmlinkage long sys32_setgid16(u16 gid) | |
127 | { | |
128 | return sys_setgid((gid_t)gid); | |
129 | } | |
130 | ||
131 | asmlinkage long sys32_setreuid16(u16 ruid, u16 euid) | |
132 | { | |
133 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); | |
134 | } | |
135 | ||
136 | asmlinkage long sys32_setuid16(u16 uid) | |
137 | { | |
138 | return sys_setuid((uid_t)uid); | |
139 | } | |
140 | ||
141 | asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid) | |
142 | { | |
143 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), | |
144 | low2highuid(suid)); | |
145 | } | |
146 | ||
24954a14 | 147 | asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid) |
1da177e4 LT |
148 | { |
149 | int retval; | |
150 | ||
151 | if (!(retval = put_user(high2lowuid(current->uid), ruid)) && | |
152 | !(retval = put_user(high2lowuid(current->euid), euid))) | |
153 | retval = put_user(high2lowuid(current->suid), suid); | |
154 | ||
155 | return retval; | |
156 | } | |
157 | ||
158 | asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid) | |
159 | { | |
160 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), | |
161 | low2highgid(sgid)); | |
162 | } | |
163 | ||
24954a14 | 164 | asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid) |
1da177e4 LT |
165 | { |
166 | int retval; | |
167 | ||
168 | if (!(retval = put_user(high2lowgid(current->gid), rgid)) && | |
169 | !(retval = put_user(high2lowgid(current->egid), egid))) | |
170 | retval = put_user(high2lowgid(current->sgid), sgid); | |
171 | ||
172 | return retval; | |
173 | } | |
174 | ||
175 | asmlinkage long sys32_setfsuid16(u16 uid) | |
176 | { | |
177 | return sys_setfsuid((uid_t)uid); | |
178 | } | |
179 | ||
180 | asmlinkage long sys32_setfsgid16(u16 gid) | |
181 | { | |
182 | return sys_setfsgid((gid_t)gid); | |
183 | } | |
184 | ||
24954a14 | 185 | static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info) |
1da177e4 LT |
186 | { |
187 | int i; | |
188 | u16 group; | |
189 | ||
190 | for (i = 0; i < group_info->ngroups; i++) { | |
191 | group = (u16)GROUP_AT(group_info, i); | |
192 | if (put_user(group, grouplist+i)) | |
193 | return -EFAULT; | |
194 | } | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
24954a14 | 199 | static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist) |
1da177e4 LT |
200 | { |
201 | int i; | |
202 | u16 group; | |
203 | ||
204 | for (i = 0; i < group_info->ngroups; i++) { | |
205 | if (get_user(group, grouplist+i)) | |
206 | return -EFAULT; | |
207 | GROUP_AT(group_info, i) = (gid_t)group; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
24954a14 | 213 | asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist) |
1da177e4 LT |
214 | { |
215 | int i; | |
216 | ||
217 | if (gidsetsize < 0) | |
218 | return -EINVAL; | |
219 | ||
220 | get_group_info(current->group_info); | |
221 | i = current->group_info->ngroups; | |
222 | if (gidsetsize) { | |
223 | if (i > gidsetsize) { | |
224 | i = -EINVAL; | |
225 | goto out; | |
226 | } | |
227 | if (groups16_to_user(grouplist, current->group_info)) { | |
228 | i = -EFAULT; | |
229 | goto out; | |
230 | } | |
231 | } | |
232 | out: | |
233 | put_group_info(current->group_info); | |
234 | return i; | |
235 | } | |
236 | ||
24954a14 | 237 | asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist) |
1da177e4 LT |
238 | { |
239 | struct group_info *group_info; | |
240 | int retval; | |
241 | ||
242 | if (!capable(CAP_SETGID)) | |
243 | return -EPERM; | |
244 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
245 | return -EINVAL; | |
246 | ||
247 | group_info = groups_alloc(gidsetsize); | |
248 | if (!group_info) | |
249 | return -ENOMEM; | |
250 | retval = groups16_from_user(group_info, grouplist); | |
251 | if (retval) { | |
252 | put_group_info(group_info); | |
253 | return retval; | |
254 | } | |
255 | ||
256 | retval = set_current_groups(group_info); | |
257 | put_group_info(group_info); | |
258 | ||
259 | return retval; | |
260 | } | |
261 | ||
262 | asmlinkage long sys32_getuid16(void) | |
263 | { | |
264 | return high2lowuid(current->uid); | |
265 | } | |
266 | ||
267 | asmlinkage long sys32_geteuid16(void) | |
268 | { | |
269 | return high2lowuid(current->euid); | |
270 | } | |
271 | ||
272 | asmlinkage long sys32_getgid16(void) | |
273 | { | |
274 | return high2lowgid(current->gid); | |
275 | } | |
276 | ||
277 | asmlinkage long sys32_getegid16(void) | |
278 | { | |
279 | return high2lowgid(current->egid); | |
280 | } | |
281 | ||
282 | /* 32-bit timeval and related flotsam. */ | |
283 | ||
24954a14 | 284 | static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i) |
1da177e4 | 285 | { |
a63a4931 | 286 | return (!access_ok(VERIFY_READ, o, sizeof(*o)) || |
1da177e4 LT |
287 | (__get_user(o->tv_sec, &i->tv_sec) || |
288 | __get_user(o->tv_usec, &i->tv_usec))); | |
289 | } | |
290 | ||
24954a14 | 291 | static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i) |
1da177e4 LT |
292 | { |
293 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
294 | (__put_user(i->tv_sec, &o->tv_sec) || | |
295 | __put_user(i->tv_usec, &o->tv_usec))); | |
296 | } | |
297 | ||
298 | /* | |
299 | * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation. | |
300 | * | |
301 | * This is really horribly ugly. | |
302 | */ | |
1df23957 | 303 | #ifdef CONFIG_SYSVIPC |
1da177e4 LT |
304 | asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr) |
305 | { | |
306 | if (call >> 16) /* hack for backward compatibility */ | |
307 | return -EINVAL; | |
308 | ||
309 | call &= 0xffff; | |
310 | ||
311 | switch (call) { | |
312 | case SEMTIMEDOP: | |
313 | return compat_sys_semtimedop(first, compat_ptr(ptr), | |
314 | second, compat_ptr(third)); | |
315 | case SEMOP: | |
316 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
317 | return sys_semtimedop(first, compat_ptr(ptr), | |
318 | second, NULL); | |
319 | case SEMGET: | |
320 | return sys_semget(first, second, third); | |
321 | case SEMCTL: | |
322 | return compat_sys_semctl(first, second, third, | |
323 | compat_ptr(ptr)); | |
324 | case MSGSND: | |
325 | return compat_sys_msgsnd(first, second, third, | |
326 | compat_ptr(ptr)); | |
327 | case MSGRCV: | |
328 | return compat_sys_msgrcv(first, second, 0, third, | |
329 | 0, compat_ptr(ptr)); | |
330 | case MSGGET: | |
331 | return sys_msgget((key_t) first, second); | |
332 | case MSGCTL: | |
333 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
334 | case SHMAT: | |
335 | return compat_sys_shmat(first, second, third, | |
336 | 0, compat_ptr(ptr)); | |
337 | case SHMDT: | |
338 | return sys_shmdt(compat_ptr(ptr)); | |
339 | case SHMGET: | |
340 | return sys_shmget(first, (unsigned)second, third); | |
341 | case SHMCTL: | |
342 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
343 | } | |
344 | ||
345 | return -ENOSYS; | |
346 | } | |
1df23957 | 347 | #endif |
1da177e4 | 348 | |
24954a14 | 349 | asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) |
1da177e4 LT |
350 | { |
351 | if ((int)high < 0) | |
352 | return -EINVAL; | |
353 | else | |
354 | return sys_truncate(path, (high << 32) | low); | |
355 | } | |
356 | ||
357 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) | |
358 | { | |
359 | if ((int)high < 0) | |
360 | return -EINVAL; | |
361 | else | |
362 | return sys_ftruncate(fd, (high << 32) | low); | |
363 | } | |
364 | ||
24954a14 | 365 | int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf) |
1da177e4 | 366 | { |
afefdbb2 | 367 | compat_ino_t ino; |
1da177e4 LT |
368 | int err; |
369 | ||
370 | if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) | |
371 | return -EOVERFLOW; | |
372 | ||
afefdbb2 DH |
373 | ino = stat->ino; |
374 | if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) | |
375 | return -EOVERFLOW; | |
376 | ||
1da177e4 LT |
377 | err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev); |
378 | err |= put_user(stat->ino, &statbuf->st_ino); | |
379 | err |= put_user(stat->mode, &statbuf->st_mode); | |
380 | err |= put_user(stat->nlink, &statbuf->st_nlink); | |
381 | err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid); | |
382 | err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid); | |
383 | err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev); | |
384 | err |= put_user(stat->size, &statbuf->st_size); | |
385 | err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); | |
386 | err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); | |
387 | err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); | |
388 | err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); | |
389 | err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); | |
390 | err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); | |
391 | err |= put_user(stat->blksize, &statbuf->st_blksize); | |
392 | err |= put_user(stat->blocks, &statbuf->st_blocks); | |
393 | /* fixme | |
394 | err |= put_user(0, &statbuf->__unused4[0]); | |
395 | err |= put_user(0, &statbuf->__unused4[1]); | |
396 | */ | |
397 | return err; | |
398 | } | |
399 | ||
1da177e4 LT |
400 | asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid, |
401 | struct compat_timespec __user *interval) | |
402 | { | |
403 | struct timespec t; | |
404 | int ret; | |
405 | mm_segment_t old_fs = get_fs (); | |
406 | ||
407 | set_fs (KERNEL_DS); | |
2b67fc46 HC |
408 | ret = sys_sched_rr_get_interval(pid, |
409 | (struct timespec __force __user *) &t); | |
1da177e4 LT |
410 | set_fs (old_fs); |
411 | if (put_compat_timespec(&t, interval)) | |
412 | return -EFAULT; | |
413 | return ret; | |
414 | } | |
415 | ||
416 | asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, | |
417 | compat_sigset_t __user *oset, size_t sigsetsize) | |
418 | { | |
419 | sigset_t s; | |
420 | compat_sigset_t s32; | |
421 | int ret; | |
422 | mm_segment_t old_fs = get_fs(); | |
423 | ||
424 | if (set) { | |
425 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) | |
426 | return -EFAULT; | |
427 | switch (_NSIG_WORDS) { | |
428 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); | |
429 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); | |
430 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); | |
431 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
432 | } | |
433 | } | |
434 | set_fs (KERNEL_DS); | |
d2c993d8 | 435 | ret = sys_rt_sigprocmask(how, |
2b67fc46 HC |
436 | set ? (sigset_t __force __user *) &s : NULL, |
437 | oset ? (sigset_t __force __user *) &s : NULL, | |
d2c993d8 | 438 | sigsetsize); |
1da177e4 LT |
439 | set_fs (old_fs); |
440 | if (ret) return ret; | |
441 | if (oset) { | |
442 | switch (_NSIG_WORDS) { | |
443 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
444 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
445 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
446 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
447 | } | |
448 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) | |
449 | return -EFAULT; | |
450 | } | |
451 | return 0; | |
452 | } | |
453 | ||
454 | asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, | |
455 | size_t sigsetsize) | |
456 | { | |
457 | sigset_t s; | |
458 | compat_sigset_t s32; | |
459 | int ret; | |
460 | mm_segment_t old_fs = get_fs(); | |
461 | ||
462 | set_fs (KERNEL_DS); | |
2b67fc46 | 463 | ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize); |
1da177e4 LT |
464 | set_fs (old_fs); |
465 | if (!ret) { | |
466 | switch (_NSIG_WORDS) { | |
467 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
468 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
469 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
470 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
471 | } | |
472 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) | |
473 | return -EFAULT; | |
474 | } | |
475 | return ret; | |
476 | } | |
477 | ||
478 | asmlinkage long | |
479 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
480 | { | |
481 | siginfo_t info; | |
482 | int ret; | |
483 | mm_segment_t old_fs = get_fs(); | |
484 | ||
485 | if (copy_siginfo_from_user32(&info, uinfo)) | |
486 | return -EFAULT; | |
487 | set_fs (KERNEL_DS); | |
2b67fc46 | 488 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info); |
1da177e4 LT |
489 | set_fs (old_fs); |
490 | return ret; | |
491 | } | |
492 | ||
493 | /* | |
494 | * sys32_execve() executes a new program after the asm stub has set | |
495 | * things up for us. This should basically do what I want it to. | |
496 | */ | |
03ff9a23 | 497 | asmlinkage long sys32_execve(void) |
1da177e4 | 498 | { |
03ff9a23 MS |
499 | struct pt_regs *regs = task_pt_regs(current); |
500 | char *filename; | |
501 | unsigned long result; | |
502 | int rc; | |
1da177e4 | 503 | |
03ff9a23 MS |
504 | filename = getname(compat_ptr(regs->orig_gpr2)); |
505 | if (IS_ERR(filename)) { | |
506 | result = PTR_ERR(filename); | |
1da177e4 | 507 | goto out; |
1da177e4 | 508 | } |
03ff9a23 MS |
509 | rc = compat_do_execve(filename, compat_ptr(regs->gprs[3]), |
510 | compat_ptr(regs->gprs[4]), regs); | |
511 | if (rc) { | |
512 | result = rc; | |
513 | goto out_putname; | |
514 | } | |
515 | task_lock(current); | |
516 | current->ptrace &= ~PT_DTRACE; | |
517 | task_unlock(current); | |
518 | current->thread.fp_regs.fpc=0; | |
519 | asm volatile("sfpc %0,0" : : "d" (0)); | |
520 | result = regs->gprs[2]; | |
521 | out_putname: | |
1da177e4 LT |
522 | putname(filename); |
523 | out: | |
03ff9a23 | 524 | return result; |
1da177e4 LT |
525 | } |
526 | ||
527 | ||
528 | #ifdef CONFIG_MODULES | |
529 | ||
530 | asmlinkage long | |
531 | sys32_init_module(void __user *umod, unsigned long len, | |
532 | const char __user *uargs) | |
533 | { | |
534 | return sys_init_module(umod, len, uargs); | |
535 | } | |
536 | ||
537 | asmlinkage long | |
538 | sys32_delete_module(const char __user *name_user, unsigned int flags) | |
539 | { | |
540 | return sys_delete_module(name_user, flags); | |
541 | } | |
542 | ||
543 | #else /* CONFIG_MODULES */ | |
544 | ||
545 | asmlinkage long | |
546 | sys32_init_module(void __user *umod, unsigned long len, | |
547 | const char __user *uargs) | |
548 | { | |
549 | return -ENOSYS; | |
550 | } | |
551 | ||
552 | asmlinkage long | |
553 | sys32_delete_module(const char __user *name_user, unsigned int flags) | |
554 | { | |
555 | return -ENOSYS; | |
556 | } | |
557 | ||
558 | #endif /* CONFIG_MODULES */ | |
559 | ||
560 | /* Translations due to time_t size differences. Which affects all | |
561 | sorts of things, like timeval and itimerval. */ | |
562 | ||
563 | extern struct timezone sys_tz; | |
564 | ||
24954a14 | 565 | asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
1da177e4 LT |
566 | { |
567 | if (tv) { | |
568 | struct timeval ktv; | |
569 | do_gettimeofday(&ktv); | |
570 | if (put_tv32(tv, &ktv)) | |
571 | return -EFAULT; | |
572 | } | |
573 | if (tz) { | |
574 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
575 | return -EFAULT; | |
576 | } | |
577 | return 0; | |
578 | } | |
579 | ||
24954a14 | 580 | static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i) |
1da177e4 LT |
581 | { |
582 | long usec; | |
583 | ||
584 | if (!access_ok(VERIFY_READ, i, sizeof(*i))) | |
585 | return -EFAULT; | |
586 | if (__get_user(o->tv_sec, &i->tv_sec)) | |
587 | return -EFAULT; | |
588 | if (__get_user(usec, &i->tv_usec)) | |
589 | return -EFAULT; | |
590 | o->tv_nsec = usec * 1000; | |
591 | return 0; | |
592 | } | |
593 | ||
24954a14 | 594 | asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
1da177e4 LT |
595 | { |
596 | struct timespec kts; | |
597 | struct timezone ktz; | |
598 | ||
599 | if (tv) { | |
600 | if (get_ts32(&kts, tv)) | |
601 | return -EFAULT; | |
602 | } | |
603 | if (tz) { | |
604 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
605 | return -EFAULT; | |
606 | } | |
607 | ||
608 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
609 | } | |
610 | ||
24954a14 | 611 | asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf, |
1da177e4 LT |
612 | size_t count, u32 poshi, u32 poslo) |
613 | { | |
614 | if ((compat_ssize_t) count < 0) | |
615 | return -EINVAL; | |
616 | return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
617 | } | |
618 | ||
24954a14 | 619 | asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf, |
1da177e4 LT |
620 | size_t count, u32 poshi, u32 poslo) |
621 | { | |
622 | if ((compat_ssize_t) count < 0) | |
623 | return -EINVAL; | |
624 | return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
625 | } | |
626 | ||
627 | asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count) | |
628 | { | |
629 | return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count); | |
630 | } | |
631 | ||
24954a14 | 632 | asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count) |
1da177e4 LT |
633 | { |
634 | mm_segment_t old_fs = get_fs(); | |
635 | int ret; | |
636 | off_t of; | |
637 | ||
638 | if (offset && get_user(of, offset)) | |
639 | return -EFAULT; | |
640 | ||
641 | set_fs(KERNEL_DS); | |
d2c993d8 | 642 | ret = sys_sendfile(out_fd, in_fd, |
2b67fc46 | 643 | offset ? (off_t __force __user *) &of : NULL, count); |
1da177e4 LT |
644 | set_fs(old_fs); |
645 | ||
83b942bd | 646 | if (offset && put_user(of, offset)) |
1da177e4 LT |
647 | return -EFAULT; |
648 | ||
649 | return ret; | |
650 | } | |
651 | ||
652 | asmlinkage long sys32_sendfile64(int out_fd, int in_fd, | |
24954a14 | 653 | compat_loff_t __user *offset, s32 count) |
1da177e4 LT |
654 | { |
655 | mm_segment_t old_fs = get_fs(); | |
656 | int ret; | |
657 | loff_t lof; | |
658 | ||
659 | if (offset && get_user(lof, offset)) | |
660 | return -EFAULT; | |
661 | ||
662 | set_fs(KERNEL_DS); | |
d2c993d8 | 663 | ret = sys_sendfile64(out_fd, in_fd, |
2b67fc46 HC |
664 | offset ? (loff_t __force __user *) &lof : NULL, |
665 | count); | |
1da177e4 LT |
666 | set_fs(old_fs); |
667 | ||
668 | if (offset && put_user(lof, offset)) | |
669 | return -EFAULT; | |
670 | ||
671 | return ret; | |
672 | } | |
673 | ||
b89a8171 | 674 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
675 | struct __sysctl_args32 { |
676 | u32 name; | |
677 | int nlen; | |
678 | u32 oldval; | |
679 | u32 oldlenp; | |
680 | u32 newval; | |
681 | u32 newlen; | |
682 | u32 __unused[4]; | |
683 | }; | |
684 | ||
24954a14 | 685 | asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args) |
1da177e4 LT |
686 | { |
687 | struct __sysctl_args32 tmp; | |
688 | int error; | |
24954a14 AV |
689 | size_t oldlen; |
690 | size_t __user *oldlenp = NULL; | |
691 | unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; | |
1da177e4 LT |
692 | |
693 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
694 | return -EFAULT; | |
695 | ||
696 | if (tmp.oldval && tmp.oldlenp) { | |
697 | /* Duh, this is ugly and might not work if sysctl_args | |
698 | is in read-only memory, but do_sysctl does indirectly | |
699 | a lot of uaccess in both directions and we'd have to | |
700 | basically copy the whole sysctl.c here, and | |
701 | glibc's __sysctl uses rw memory for the structure | |
702 | anyway. */ | |
24954a14 AV |
703 | if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) || |
704 | put_user(oldlen, (size_t __user *)addr)) | |
1da177e4 | 705 | return -EFAULT; |
24954a14 | 706 | oldlenp = (size_t __user *)addr; |
1da177e4 LT |
707 | } |
708 | ||
709 | lock_kernel(); | |
24954a14 AV |
710 | error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval), |
711 | oldlenp, compat_ptr(tmp.newval), tmp.newlen); | |
1da177e4 LT |
712 | unlock_kernel(); |
713 | if (oldlenp) { | |
714 | if (!error) { | |
24954a14 AV |
715 | if (get_user(oldlen, (size_t __user *)addr) || |
716 | put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp))) | |
1da177e4 LT |
717 | error = -EFAULT; |
718 | } | |
12bae235 HC |
719 | if (copy_to_user(args->__unused, tmp.__unused, |
720 | sizeof(tmp.__unused))) | |
721 | error = -EFAULT; | |
1da177e4 LT |
722 | } |
723 | return error; | |
724 | } | |
725 | #endif | |
726 | ||
727 | struct stat64_emu31 { | |
728 | unsigned long long st_dev; | |
729 | unsigned int __pad1; | |
730 | #define STAT64_HAS_BROKEN_ST_INO 1 | |
731 | u32 __st_ino; | |
732 | unsigned int st_mode; | |
733 | unsigned int st_nlink; | |
734 | u32 st_uid; | |
735 | u32 st_gid; | |
736 | unsigned long long st_rdev; | |
737 | unsigned int __pad3; | |
738 | long st_size; | |
739 | u32 st_blksize; | |
740 | unsigned char __pad4[4]; | |
741 | u32 __pad5; /* future possible st_blocks high bits */ | |
742 | u32 st_blocks; /* Number 512-byte blocks allocated. */ | |
743 | u32 st_atime; | |
744 | u32 __pad6; | |
745 | u32 st_mtime; | |
746 | u32 __pad7; | |
747 | u32 st_ctime; | |
748 | u32 __pad8; /* will be high 32 bits of ctime someday */ | |
749 | unsigned long st_ino; | |
750 | }; | |
751 | ||
24954a14 | 752 | static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat) |
1da177e4 LT |
753 | { |
754 | struct stat64_emu31 tmp; | |
755 | ||
756 | memset(&tmp, 0, sizeof(tmp)); | |
757 | ||
758 | tmp.st_dev = huge_encode_dev(stat->dev); | |
759 | tmp.st_ino = stat->ino; | |
760 | tmp.__st_ino = (u32)stat->ino; | |
761 | tmp.st_mode = stat->mode; | |
762 | tmp.st_nlink = (unsigned int)stat->nlink; | |
763 | tmp.st_uid = stat->uid; | |
764 | tmp.st_gid = stat->gid; | |
765 | tmp.st_rdev = huge_encode_dev(stat->rdev); | |
766 | tmp.st_size = stat->size; | |
767 | tmp.st_blksize = (u32)stat->blksize; | |
768 | tmp.st_blocks = (u32)stat->blocks; | |
769 | tmp.st_atime = (u32)stat->atime.tv_sec; | |
770 | tmp.st_mtime = (u32)stat->mtime.tv_sec; | |
771 | tmp.st_ctime = (u32)stat->ctime.tv_sec; | |
772 | ||
773 | return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; | |
774 | } | |
775 | ||
24954a14 | 776 | asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
777 | { |
778 | struct kstat stat; | |
779 | int ret = vfs_stat(filename, &stat); | |
780 | if (!ret) | |
781 | ret = cp_stat64(statbuf, &stat); | |
782 | return ret; | |
783 | } | |
784 | ||
24954a14 | 785 | asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
786 | { |
787 | struct kstat stat; | |
788 | int ret = vfs_lstat(filename, &stat); | |
789 | if (!ret) | |
790 | ret = cp_stat64(statbuf, &stat); | |
791 | return ret; | |
792 | } | |
793 | ||
24954a14 | 794 | asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
795 | { |
796 | struct kstat stat; | |
797 | int ret = vfs_fstat(fd, &stat); | |
798 | if (!ret) | |
799 | ret = cp_stat64(statbuf, &stat); | |
800 | return ret; | |
801 | } | |
802 | ||
ed3d021b HC |
803 | asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename, |
804 | struct stat64_emu31 __user* statbuf, int flag) | |
19bf9cbf HC |
805 | { |
806 | struct kstat stat; | |
807 | int error = -EINVAL; | |
808 | ||
809 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
810 | goto out; | |
811 | ||
812 | if (flag & AT_SYMLINK_NOFOLLOW) | |
813 | error = vfs_lstat_fd(dfd, filename, &stat); | |
814 | else | |
815 | error = vfs_stat_fd(dfd, filename, &stat); | |
816 | ||
817 | if (!error) | |
818 | error = cp_stat64(statbuf, &stat); | |
819 | out: | |
820 | return error; | |
821 | } | |
822 | ||
1da177e4 LT |
823 | /* |
824 | * Linux/i386 didn't use to be able to handle more than | |
825 | * 4 system call parameters, so these system calls used a memory | |
826 | * block for parameter passing.. | |
827 | */ | |
828 | ||
829 | struct mmap_arg_struct_emu31 { | |
830 | u32 addr; | |
831 | u32 len; | |
832 | u32 prot; | |
833 | u32 flags; | |
834 | u32 fd; | |
835 | u32 offset; | |
836 | }; | |
837 | ||
838 | /* common code for old and new mmaps */ | |
839 | static inline long do_mmap2( | |
840 | unsigned long addr, unsigned long len, | |
841 | unsigned long prot, unsigned long flags, | |
842 | unsigned long fd, unsigned long pgoff) | |
843 | { | |
844 | struct file * file = NULL; | |
845 | unsigned long error = -EBADF; | |
846 | ||
847 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
848 | if (!(flags & MAP_ANONYMOUS)) { | |
849 | file = fget(fd); | |
850 | if (!file) | |
851 | goto out; | |
852 | } | |
853 | ||
854 | down_write(¤t->mm->mmap_sem); | |
855 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
856 | if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) { | |
857 | /* Result is out of bounds. */ | |
858 | do_munmap(current->mm, addr, len); | |
859 | error = -ENOMEM; | |
860 | } | |
861 | up_write(¤t->mm->mmap_sem); | |
862 | ||
863 | if (file) | |
864 | fput(file); | |
865 | out: | |
866 | return error; | |
867 | } | |
868 | ||
869 | ||
870 | asmlinkage unsigned long | |
24954a14 | 871 | old32_mmap(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
872 | { |
873 | struct mmap_arg_struct_emu31 a; | |
874 | int error = -EFAULT; | |
875 | ||
876 | if (copy_from_user(&a, arg, sizeof(a))) | |
877 | goto out; | |
878 | ||
879 | error = -EINVAL; | |
880 | if (a.offset & ~PAGE_MASK) | |
881 | goto out; | |
882 | ||
883 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT); | |
884 | out: | |
885 | return error; | |
886 | } | |
887 | ||
888 | asmlinkage long | |
24954a14 | 889 | sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
890 | { |
891 | struct mmap_arg_struct_emu31 a; | |
892 | int error = -EFAULT; | |
893 | ||
894 | if (copy_from_user(&a, arg, sizeof(a))) | |
895 | goto out; | |
896 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); | |
897 | out: | |
898 | return error; | |
899 | } | |
900 | ||
24954a14 | 901 | asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
902 | { |
903 | if ((compat_ssize_t) count < 0) | |
904 | return -EINVAL; | |
905 | ||
906 | return sys_read(fd, buf, count); | |
907 | } | |
908 | ||
24954a14 | 909 | asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
910 | { |
911 | if ((compat_ssize_t) count < 0) | |
912 | return -EINVAL; | |
913 | ||
914 | return sys_write(fd, buf, count); | |
915 | } | |
916 | ||
03ff9a23 | 917 | asmlinkage long sys32_clone(void) |
1da177e4 | 918 | { |
03ff9a23 MS |
919 | struct pt_regs *regs = task_pt_regs(current); |
920 | unsigned long clone_flags; | |
921 | unsigned long newsp; | |
24954a14 | 922 | int __user *parent_tidptr, *child_tidptr; |
1da177e4 | 923 | |
03ff9a23 MS |
924 | clone_flags = regs->gprs[3] & 0xffffffffUL; |
925 | newsp = regs->orig_gpr2 & 0x7fffffffUL; | |
926 | parent_tidptr = compat_ptr(regs->gprs[4]); | |
927 | child_tidptr = compat_ptr(regs->gprs[5]); | |
928 | if (!newsp) | |
929 | newsp = regs->gprs[15]; | |
930 | return do_fork(clone_flags, newsp, regs, 0, | |
1da177e4 LT |
931 | parent_tidptr, child_tidptr); |
932 | } | |
933 | ||
068e1b94 MS |
934 | /* |
935 | * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64. | |
936 | * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE} | |
937 | * because the 31 bit values differ from the 64 bit values. | |
938 | */ | |
939 | ||
940 | asmlinkage long | |
941 | sys32_fadvise64(int fd, loff_t offset, size_t len, int advise) | |
942 | { | |
943 | if (advise == 4) | |
944 | advise = POSIX_FADV_DONTNEED; | |
945 | else if (advise == 5) | |
946 | advise = POSIX_FADV_NOREUSE; | |
947 | return sys_fadvise64(fd, offset, len, advise); | |
948 | } | |
949 | ||
950 | struct fadvise64_64_args { | |
951 | int fd; | |
952 | long long offset; | |
953 | long long len; | |
954 | int advice; | |
955 | }; | |
956 | ||
957 | asmlinkage long | |
958 | sys32_fadvise64_64(struct fadvise64_64_args __user *args) | |
959 | { | |
960 | struct fadvise64_64_args a; | |
961 | ||
962 | if ( copy_from_user(&a, args, sizeof(a)) ) | |
963 | return -EFAULT; | |
964 | if (a.advice == 4) | |
965 | a.advice = POSIX_FADV_DONTNEED; | |
966 | else if (a.advice == 5) | |
967 | a.advice = POSIX_FADV_NOREUSE; | |
968 | return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); | |
969 | } |