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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 LT |
27 | #include <linux/smp.h> |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/sem.h> | |
30 | #include <linux/msg.h> | |
31 | #include <linux/shm.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/uio.h> | |
1da177e4 LT |
34 | #include <linux/quota.h> |
35 | #include <linux/module.h> | |
1da177e4 LT |
36 | #include <linux/poll.h> |
37 | #include <linux/personality.h> | |
38 | #include <linux/stat.h> | |
39 | #include <linux/filter.h> | |
40 | #include <linux/highmem.h> | |
41 | #include <linux/highuid.h> | |
42 | #include <linux/mman.h> | |
43 | #include <linux/ipv6.h> | |
44 | #include <linux/in.h> | |
45 | #include <linux/icmpv6.h> | |
46 | #include <linux/syscalls.h> | |
47 | #include <linux/sysctl.h> | |
48 | #include <linux/binfmts.h> | |
a9415644 | 49 | #include <linux/capability.h> |
1da177e4 LT |
50 | #include <linux/compat.h> |
51 | #include <linux/vfs.h> | |
52 | #include <linux/ptrace.h> | |
068e1b94 | 53 | #include <linux/fadvise.h> |
cba4fbbf | 54 | #include <linux/ipc.h> |
1da177e4 LT |
55 | |
56 | #include <asm/types.h> | |
1da177e4 | 57 | #include <asm/uaccess.h> |
1da177e4 LT |
58 | |
59 | #include <net/scm.h> | |
60 | #include <net/sock.h> | |
61 | ||
62 | #include "compat_linux.h" | |
63 | ||
c1821c2e GS |
64 | long psw_user32_bits = (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | |
65 | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | | |
66 | PSW_MASK_PSTATE | PSW_DEFAULT_KEY); | |
67 | long psw32_user_bits = (PSW32_BASE_BITS | PSW32_MASK_DAT | PSW32_ASC_HOME | | |
68 | PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | | |
69 | PSW32_MASK_PSTATE); | |
1da177e4 LT |
70 | |
71 | /* For this source file, we want overflow handling. */ | |
72 | ||
73 | #undef high2lowuid | |
74 | #undef high2lowgid | |
75 | #undef low2highuid | |
76 | #undef low2highgid | |
77 | #undef SET_UID16 | |
78 | #undef SET_GID16 | |
79 | #undef NEW_TO_OLD_UID | |
80 | #undef NEW_TO_OLD_GID | |
81 | #undef SET_OLDSTAT_UID | |
82 | #undef SET_OLDSTAT_GID | |
83 | #undef SET_STAT_UID | |
84 | #undef SET_STAT_GID | |
85 | ||
86 | #define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid) | |
87 | #define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid) | |
88 | #define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid) | |
89 | #define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid) | |
90 | #define SET_UID16(var, uid) var = high2lowuid(uid) | |
91 | #define SET_GID16(var, gid) var = high2lowgid(gid) | |
92 | #define NEW_TO_OLD_UID(uid) high2lowuid(uid) | |
93 | #define NEW_TO_OLD_GID(gid) high2lowgid(gid) | |
94 | #define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
95 | #define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
96 | #define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
97 | #define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
98 | ||
24954a14 | 99 | asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group) |
1da177e4 LT |
100 | { |
101 | return sys_chown(filename, low2highuid(user), low2highgid(group)); | |
102 | } | |
103 | ||
24954a14 | 104 | asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group) |
1da177e4 LT |
105 | { |
106 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); | |
107 | } | |
108 | ||
109 | asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group) | |
110 | { | |
111 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); | |
112 | } | |
113 | ||
114 | asmlinkage long sys32_setregid16(u16 rgid, u16 egid) | |
115 | { | |
116 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); | |
117 | } | |
118 | ||
119 | asmlinkage long sys32_setgid16(u16 gid) | |
120 | { | |
121 | return sys_setgid((gid_t)gid); | |
122 | } | |
123 | ||
124 | asmlinkage long sys32_setreuid16(u16 ruid, u16 euid) | |
125 | { | |
126 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); | |
127 | } | |
128 | ||
129 | asmlinkage long sys32_setuid16(u16 uid) | |
130 | { | |
131 | return sys_setuid((uid_t)uid); | |
132 | } | |
133 | ||
134 | asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid) | |
135 | { | |
136 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), | |
137 | low2highuid(suid)); | |
138 | } | |
139 | ||
24954a14 | 140 | asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid) |
1da177e4 LT |
141 | { |
142 | int retval; | |
143 | ||
b6dff3ec DH |
144 | if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) && |
145 | !(retval = put_user(high2lowuid(current->cred->euid), euid))) | |
146 | retval = put_user(high2lowuid(current->cred->suid), suid); | |
1da177e4 LT |
147 | |
148 | return retval; | |
149 | } | |
150 | ||
151 | asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid) | |
152 | { | |
153 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), | |
154 | low2highgid(sgid)); | |
155 | } | |
156 | ||
24954a14 | 157 | asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid) |
1da177e4 LT |
158 | { |
159 | int retval; | |
160 | ||
b6dff3ec DH |
161 | if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) && |
162 | !(retval = put_user(high2lowgid(current->cred->egid), egid))) | |
163 | retval = put_user(high2lowgid(current->cred->sgid), sgid); | |
1da177e4 LT |
164 | |
165 | return retval; | |
166 | } | |
167 | ||
168 | asmlinkage long sys32_setfsuid16(u16 uid) | |
169 | { | |
170 | return sys_setfsuid((uid_t)uid); | |
171 | } | |
172 | ||
173 | asmlinkage long sys32_setfsgid16(u16 gid) | |
174 | { | |
175 | return sys_setfsgid((gid_t)gid); | |
176 | } | |
177 | ||
24954a14 | 178 | static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info) |
1da177e4 LT |
179 | { |
180 | int i; | |
181 | u16 group; | |
182 | ||
183 | for (i = 0; i < group_info->ngroups; i++) { | |
184 | group = (u16)GROUP_AT(group_info, i); | |
185 | if (put_user(group, grouplist+i)) | |
186 | return -EFAULT; | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
24954a14 | 192 | static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist) |
1da177e4 LT |
193 | { |
194 | int i; | |
195 | u16 group; | |
196 | ||
197 | for (i = 0; i < group_info->ngroups; i++) { | |
198 | if (get_user(group, grouplist+i)) | |
199 | return -EFAULT; | |
200 | GROUP_AT(group_info, i) = (gid_t)group; | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
24954a14 | 206 | asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist) |
1da177e4 LT |
207 | { |
208 | int i; | |
209 | ||
210 | if (gidsetsize < 0) | |
211 | return -EINVAL; | |
212 | ||
b6dff3ec DH |
213 | get_group_info(current->cred->group_info); |
214 | i = current->cred->group_info->ngroups; | |
1da177e4 LT |
215 | if (gidsetsize) { |
216 | if (i > gidsetsize) { | |
217 | i = -EINVAL; | |
218 | goto out; | |
219 | } | |
b6dff3ec | 220 | if (groups16_to_user(grouplist, current->cred->group_info)) { |
1da177e4 LT |
221 | i = -EFAULT; |
222 | goto out; | |
223 | } | |
224 | } | |
225 | out: | |
b6dff3ec | 226 | put_group_info(current->cred->group_info); |
1da177e4 LT |
227 | return i; |
228 | } | |
229 | ||
24954a14 | 230 | asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist) |
1da177e4 LT |
231 | { |
232 | struct group_info *group_info; | |
233 | int retval; | |
234 | ||
235 | if (!capable(CAP_SETGID)) | |
236 | return -EPERM; | |
237 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
238 | return -EINVAL; | |
239 | ||
240 | group_info = groups_alloc(gidsetsize); | |
241 | if (!group_info) | |
242 | return -ENOMEM; | |
243 | retval = groups16_from_user(group_info, grouplist); | |
244 | if (retval) { | |
245 | put_group_info(group_info); | |
246 | return retval; | |
247 | } | |
248 | ||
249 | retval = set_current_groups(group_info); | |
250 | put_group_info(group_info); | |
251 | ||
252 | return retval; | |
253 | } | |
254 | ||
255 | asmlinkage long sys32_getuid16(void) | |
256 | { | |
b6dff3ec | 257 | return high2lowuid(current->cred->uid); |
1da177e4 LT |
258 | } |
259 | ||
260 | asmlinkage long sys32_geteuid16(void) | |
261 | { | |
b6dff3ec | 262 | return high2lowuid(current->cred->euid); |
1da177e4 LT |
263 | } |
264 | ||
265 | asmlinkage long sys32_getgid16(void) | |
266 | { | |
b6dff3ec | 267 | return high2lowgid(current->cred->gid); |
1da177e4 LT |
268 | } |
269 | ||
270 | asmlinkage long sys32_getegid16(void) | |
271 | { | |
b6dff3ec | 272 | return high2lowgid(current->cred->egid); |
1da177e4 LT |
273 | } |
274 | ||
1da177e4 LT |
275 | /* |
276 | * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation. | |
277 | * | |
278 | * This is really horribly ugly. | |
279 | */ | |
1df23957 | 280 | #ifdef CONFIG_SYSVIPC |
1da177e4 LT |
281 | asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr) |
282 | { | |
283 | if (call >> 16) /* hack for backward compatibility */ | |
284 | return -EINVAL; | |
285 | ||
286 | call &= 0xffff; | |
287 | ||
288 | switch (call) { | |
289 | case SEMTIMEDOP: | |
290 | return compat_sys_semtimedop(first, compat_ptr(ptr), | |
291 | second, compat_ptr(third)); | |
292 | case SEMOP: | |
293 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
294 | return sys_semtimedop(first, compat_ptr(ptr), | |
295 | second, NULL); | |
296 | case SEMGET: | |
297 | return sys_semget(first, second, third); | |
298 | case SEMCTL: | |
299 | return compat_sys_semctl(first, second, third, | |
300 | compat_ptr(ptr)); | |
301 | case MSGSND: | |
302 | return compat_sys_msgsnd(first, second, third, | |
303 | compat_ptr(ptr)); | |
304 | case MSGRCV: | |
305 | return compat_sys_msgrcv(first, second, 0, third, | |
306 | 0, compat_ptr(ptr)); | |
307 | case MSGGET: | |
308 | return sys_msgget((key_t) first, second); | |
309 | case MSGCTL: | |
310 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
311 | case SHMAT: | |
312 | return compat_sys_shmat(first, second, third, | |
313 | 0, compat_ptr(ptr)); | |
314 | case SHMDT: | |
315 | return sys_shmdt(compat_ptr(ptr)); | |
316 | case SHMGET: | |
317 | return sys_shmget(first, (unsigned)second, third); | |
318 | case SHMCTL: | |
319 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
320 | } | |
321 | ||
322 | return -ENOSYS; | |
323 | } | |
1df23957 | 324 | #endif |
1da177e4 | 325 | |
24954a14 | 326 | asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) |
1da177e4 LT |
327 | { |
328 | if ((int)high < 0) | |
329 | return -EINVAL; | |
330 | else | |
331 | return sys_truncate(path, (high << 32) | low); | |
332 | } | |
333 | ||
334 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) | |
335 | { | |
336 | if ((int)high < 0) | |
337 | return -EINVAL; | |
338 | else | |
339 | return sys_ftruncate(fd, (high << 32) | low); | |
340 | } | |
341 | ||
1da177e4 LT |
342 | asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid, |
343 | struct compat_timespec __user *interval) | |
344 | { | |
345 | struct timespec t; | |
346 | int ret; | |
347 | mm_segment_t old_fs = get_fs (); | |
348 | ||
349 | set_fs (KERNEL_DS); | |
2b67fc46 HC |
350 | ret = sys_sched_rr_get_interval(pid, |
351 | (struct timespec __force __user *) &t); | |
1da177e4 LT |
352 | set_fs (old_fs); |
353 | if (put_compat_timespec(&t, interval)) | |
354 | return -EFAULT; | |
355 | return ret; | |
356 | } | |
357 | ||
358 | asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, | |
359 | compat_sigset_t __user *oset, size_t sigsetsize) | |
360 | { | |
361 | sigset_t s; | |
362 | compat_sigset_t s32; | |
363 | int ret; | |
364 | mm_segment_t old_fs = get_fs(); | |
365 | ||
366 | if (set) { | |
367 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) | |
368 | return -EFAULT; | |
369 | switch (_NSIG_WORDS) { | |
370 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); | |
371 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); | |
372 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); | |
373 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
374 | } | |
375 | } | |
376 | set_fs (KERNEL_DS); | |
d2c993d8 | 377 | ret = sys_rt_sigprocmask(how, |
2b67fc46 HC |
378 | set ? (sigset_t __force __user *) &s : NULL, |
379 | oset ? (sigset_t __force __user *) &s : NULL, | |
d2c993d8 | 380 | sigsetsize); |
1da177e4 LT |
381 | set_fs (old_fs); |
382 | if (ret) return ret; | |
383 | if (oset) { | |
384 | switch (_NSIG_WORDS) { | |
385 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
386 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
387 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
388 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
389 | } | |
390 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) | |
391 | return -EFAULT; | |
392 | } | |
393 | return 0; | |
394 | } | |
395 | ||
396 | asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, | |
397 | size_t sigsetsize) | |
398 | { | |
399 | sigset_t s; | |
400 | compat_sigset_t s32; | |
401 | int ret; | |
402 | mm_segment_t old_fs = get_fs(); | |
403 | ||
404 | set_fs (KERNEL_DS); | |
2b67fc46 | 405 | ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize); |
1da177e4 LT |
406 | set_fs (old_fs); |
407 | if (!ret) { | |
408 | switch (_NSIG_WORDS) { | |
409 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
410 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
411 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
412 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
413 | } | |
414 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) | |
415 | return -EFAULT; | |
416 | } | |
417 | return ret; | |
418 | } | |
419 | ||
420 | asmlinkage long | |
421 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
422 | { | |
423 | siginfo_t info; | |
424 | int ret; | |
425 | mm_segment_t old_fs = get_fs(); | |
426 | ||
427 | if (copy_siginfo_from_user32(&info, uinfo)) | |
428 | return -EFAULT; | |
429 | set_fs (KERNEL_DS); | |
2b67fc46 | 430 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info); |
1da177e4 LT |
431 | set_fs (old_fs); |
432 | return ret; | |
433 | } | |
434 | ||
435 | /* | |
436 | * sys32_execve() executes a new program after the asm stub has set | |
437 | * things up for us. This should basically do what I want it to. | |
438 | */ | |
3e86a8c6 HC |
439 | asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv, |
440 | compat_uptr_t __user *envp) | |
1da177e4 | 441 | { |
03ff9a23 MS |
442 | struct pt_regs *regs = task_pt_regs(current); |
443 | char *filename; | |
3e86a8c6 HC |
444 | long rc; |
445 | ||
446 | filename = getname(name); | |
447 | rc = PTR_ERR(filename); | |
448 | if (IS_ERR(filename)) | |
449 | return rc; | |
450 | rc = compat_do_execve(filename, argv, envp, regs); | |
451 | if (rc) | |
452 | goto out; | |
03ff9a23 MS |
453 | current->thread.fp_regs.fpc=0; |
454 | asm volatile("sfpc %0,0" : : "d" (0)); | |
3e86a8c6 | 455 | rc = regs->gprs[2]; |
1da177e4 | 456 | out: |
3e86a8c6 HC |
457 | putname(filename); |
458 | return rc; | |
1da177e4 LT |
459 | } |
460 | ||
24954a14 | 461 | asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf, |
1da177e4 LT |
462 | size_t count, u32 poshi, u32 poslo) |
463 | { | |
464 | if ((compat_ssize_t) count < 0) | |
465 | return -EINVAL; | |
466 | return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
467 | } | |
468 | ||
24954a14 | 469 | asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf, |
1da177e4 LT |
470 | size_t count, u32 poshi, u32 poslo) |
471 | { | |
472 | if ((compat_ssize_t) count < 0) | |
473 | return -EINVAL; | |
474 | return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
475 | } | |
476 | ||
477 | asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count) | |
478 | { | |
479 | return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count); | |
480 | } | |
481 | ||
24954a14 | 482 | asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count) |
1da177e4 LT |
483 | { |
484 | mm_segment_t old_fs = get_fs(); | |
485 | int ret; | |
486 | off_t of; | |
487 | ||
488 | if (offset && get_user(of, offset)) | |
489 | return -EFAULT; | |
490 | ||
491 | set_fs(KERNEL_DS); | |
d2c993d8 | 492 | ret = sys_sendfile(out_fd, in_fd, |
2b67fc46 | 493 | offset ? (off_t __force __user *) &of : NULL, count); |
1da177e4 LT |
494 | set_fs(old_fs); |
495 | ||
83b942bd | 496 | if (offset && put_user(of, offset)) |
1da177e4 LT |
497 | return -EFAULT; |
498 | ||
499 | return ret; | |
500 | } | |
501 | ||
502 | asmlinkage long sys32_sendfile64(int out_fd, int in_fd, | |
24954a14 | 503 | compat_loff_t __user *offset, s32 count) |
1da177e4 LT |
504 | { |
505 | mm_segment_t old_fs = get_fs(); | |
506 | int ret; | |
507 | loff_t lof; | |
508 | ||
509 | if (offset && get_user(lof, offset)) | |
510 | return -EFAULT; | |
511 | ||
512 | set_fs(KERNEL_DS); | |
d2c993d8 | 513 | ret = sys_sendfile64(out_fd, in_fd, |
2b67fc46 HC |
514 | offset ? (loff_t __force __user *) &lof : NULL, |
515 | count); | |
1da177e4 LT |
516 | set_fs(old_fs); |
517 | ||
518 | if (offset && put_user(lof, offset)) | |
519 | return -EFAULT; | |
520 | ||
521 | return ret; | |
522 | } | |
523 | ||
1da177e4 LT |
524 | struct stat64_emu31 { |
525 | unsigned long long st_dev; | |
526 | unsigned int __pad1; | |
527 | #define STAT64_HAS_BROKEN_ST_INO 1 | |
528 | u32 __st_ino; | |
529 | unsigned int st_mode; | |
530 | unsigned int st_nlink; | |
531 | u32 st_uid; | |
532 | u32 st_gid; | |
533 | unsigned long long st_rdev; | |
534 | unsigned int __pad3; | |
535 | long st_size; | |
536 | u32 st_blksize; | |
537 | unsigned char __pad4[4]; | |
538 | u32 __pad5; /* future possible st_blocks high bits */ | |
539 | u32 st_blocks; /* Number 512-byte blocks allocated. */ | |
540 | u32 st_atime; | |
541 | u32 __pad6; | |
542 | u32 st_mtime; | |
543 | u32 __pad7; | |
544 | u32 st_ctime; | |
545 | u32 __pad8; /* will be high 32 bits of ctime someday */ | |
546 | unsigned long st_ino; | |
547 | }; | |
548 | ||
24954a14 | 549 | static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat) |
1da177e4 LT |
550 | { |
551 | struct stat64_emu31 tmp; | |
552 | ||
553 | memset(&tmp, 0, sizeof(tmp)); | |
554 | ||
555 | tmp.st_dev = huge_encode_dev(stat->dev); | |
556 | tmp.st_ino = stat->ino; | |
557 | tmp.__st_ino = (u32)stat->ino; | |
558 | tmp.st_mode = stat->mode; | |
559 | tmp.st_nlink = (unsigned int)stat->nlink; | |
560 | tmp.st_uid = stat->uid; | |
561 | tmp.st_gid = stat->gid; | |
562 | tmp.st_rdev = huge_encode_dev(stat->rdev); | |
563 | tmp.st_size = stat->size; | |
564 | tmp.st_blksize = (u32)stat->blksize; | |
565 | tmp.st_blocks = (u32)stat->blocks; | |
566 | tmp.st_atime = (u32)stat->atime.tv_sec; | |
567 | tmp.st_mtime = (u32)stat->mtime.tv_sec; | |
568 | tmp.st_ctime = (u32)stat->ctime.tv_sec; | |
569 | ||
570 | return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; | |
571 | } | |
572 | ||
24954a14 | 573 | asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
574 | { |
575 | struct kstat stat; | |
576 | int ret = vfs_stat(filename, &stat); | |
577 | if (!ret) | |
578 | ret = cp_stat64(statbuf, &stat); | |
579 | return ret; | |
580 | } | |
581 | ||
24954a14 | 582 | asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
583 | { |
584 | struct kstat stat; | |
585 | int ret = vfs_lstat(filename, &stat); | |
586 | if (!ret) | |
587 | ret = cp_stat64(statbuf, &stat); | |
588 | return ret; | |
589 | } | |
590 | ||
24954a14 | 591 | asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
592 | { |
593 | struct kstat stat; | |
594 | int ret = vfs_fstat(fd, &stat); | |
595 | if (!ret) | |
596 | ret = cp_stat64(statbuf, &stat); | |
597 | return ret; | |
598 | } | |
599 | ||
ed3d021b HC |
600 | asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename, |
601 | struct stat64_emu31 __user* statbuf, int flag) | |
19bf9cbf HC |
602 | { |
603 | struct kstat stat; | |
0112fc22 | 604 | int error; |
19bf9cbf | 605 | |
0112fc22 OD |
606 | error = vfs_fstatat(dfd, filename, &stat, flag); |
607 | if (error) | |
608 | return error; | |
609 | return cp_stat64(statbuf, &stat); | |
19bf9cbf HC |
610 | } |
611 | ||
1da177e4 LT |
612 | /* |
613 | * Linux/i386 didn't use to be able to handle more than | |
614 | * 4 system call parameters, so these system calls used a memory | |
615 | * block for parameter passing.. | |
616 | */ | |
617 | ||
618 | struct mmap_arg_struct_emu31 { | |
619 | u32 addr; | |
620 | u32 len; | |
621 | u32 prot; | |
622 | u32 flags; | |
623 | u32 fd; | |
624 | u32 offset; | |
625 | }; | |
626 | ||
1da177e4 | 627 | asmlinkage unsigned long |
24954a14 | 628 | old32_mmap(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
629 | { |
630 | struct mmap_arg_struct_emu31 a; | |
631 | int error = -EFAULT; | |
632 | ||
633 | if (copy_from_user(&a, arg, sizeof(a))) | |
634 | goto out; | |
635 | ||
636 | error = -EINVAL; | |
637 | if (a.offset & ~PAGE_MASK) | |
638 | goto out; | |
639 | ||
f8b72560 AV |
640 | error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, |
641 | a.offset >> PAGE_SHIFT); | |
1da177e4 LT |
642 | out: |
643 | return error; | |
644 | } | |
645 | ||
646 | asmlinkage long | |
24954a14 | 647 | sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
648 | { |
649 | struct mmap_arg_struct_emu31 a; | |
650 | int error = -EFAULT; | |
651 | ||
652 | if (copy_from_user(&a, arg, sizeof(a))) | |
653 | goto out; | |
f8b72560 | 654 | error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); |
1da177e4 LT |
655 | out: |
656 | return error; | |
657 | } | |
658 | ||
24954a14 | 659 | asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
660 | { |
661 | if ((compat_ssize_t) count < 0) | |
662 | return -EINVAL; | |
663 | ||
664 | return sys_read(fd, buf, count); | |
665 | } | |
666 | ||
24954a14 | 667 | asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
668 | { |
669 | if ((compat_ssize_t) count < 0) | |
670 | return -EINVAL; | |
671 | ||
672 | return sys_write(fd, buf, count); | |
673 | } | |
674 | ||
068e1b94 MS |
675 | /* |
676 | * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64. | |
677 | * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE} | |
678 | * because the 31 bit values differ from the 64 bit values. | |
679 | */ | |
680 | ||
681 | asmlinkage long | |
682 | sys32_fadvise64(int fd, loff_t offset, size_t len, int advise) | |
683 | { | |
684 | if (advise == 4) | |
685 | advise = POSIX_FADV_DONTNEED; | |
686 | else if (advise == 5) | |
687 | advise = POSIX_FADV_NOREUSE; | |
688 | return sys_fadvise64(fd, offset, len, advise); | |
689 | } | |
690 | ||
691 | struct fadvise64_64_args { | |
692 | int fd; | |
693 | long long offset; | |
694 | long long len; | |
695 | int advice; | |
696 | }; | |
697 | ||
698 | asmlinkage long | |
699 | sys32_fadvise64_64(struct fadvise64_64_args __user *args) | |
700 | { | |
701 | struct fadvise64_64_args a; | |
702 | ||
703 | if ( copy_from_user(&a, args, sizeof(a)) ) | |
704 | return -EFAULT; | |
705 | if (a.advice == 4) | |
706 | a.advice = POSIX_FADV_DONTNEED; | |
707 | else if (a.advice == 5) | |
708 | a.advice = POSIX_FADV_NOREUSE; | |
709 | return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); | |
710 | } |