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 | ||
1da177e4 LT |
282 | /* |
283 | * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation. | |
284 | * | |
285 | * This is really horribly ugly. | |
286 | */ | |
1df23957 | 287 | #ifdef CONFIG_SYSVIPC |
1da177e4 LT |
288 | asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr) |
289 | { | |
290 | if (call >> 16) /* hack for backward compatibility */ | |
291 | return -EINVAL; | |
292 | ||
293 | call &= 0xffff; | |
294 | ||
295 | switch (call) { | |
296 | case SEMTIMEDOP: | |
297 | return compat_sys_semtimedop(first, compat_ptr(ptr), | |
298 | second, compat_ptr(third)); | |
299 | case SEMOP: | |
300 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
301 | return sys_semtimedop(first, compat_ptr(ptr), | |
302 | second, NULL); | |
303 | case SEMGET: | |
304 | return sys_semget(first, second, third); | |
305 | case SEMCTL: | |
306 | return compat_sys_semctl(first, second, third, | |
307 | compat_ptr(ptr)); | |
308 | case MSGSND: | |
309 | return compat_sys_msgsnd(first, second, third, | |
310 | compat_ptr(ptr)); | |
311 | case MSGRCV: | |
312 | return compat_sys_msgrcv(first, second, 0, third, | |
313 | 0, compat_ptr(ptr)); | |
314 | case MSGGET: | |
315 | return sys_msgget((key_t) first, second); | |
316 | case MSGCTL: | |
317 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
318 | case SHMAT: | |
319 | return compat_sys_shmat(first, second, third, | |
320 | 0, compat_ptr(ptr)); | |
321 | case SHMDT: | |
322 | return sys_shmdt(compat_ptr(ptr)); | |
323 | case SHMGET: | |
324 | return sys_shmget(first, (unsigned)second, third); | |
325 | case SHMCTL: | |
326 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
327 | } | |
328 | ||
329 | return -ENOSYS; | |
330 | } | |
1df23957 | 331 | #endif |
1da177e4 | 332 | |
24954a14 | 333 | asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) |
1da177e4 LT |
334 | { |
335 | if ((int)high < 0) | |
336 | return -EINVAL; | |
337 | else | |
338 | return sys_truncate(path, (high << 32) | low); | |
339 | } | |
340 | ||
341 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) | |
342 | { | |
343 | if ((int)high < 0) | |
344 | return -EINVAL; | |
345 | else | |
346 | return sys_ftruncate(fd, (high << 32) | low); | |
347 | } | |
348 | ||
1da177e4 LT |
349 | asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid, |
350 | struct compat_timespec __user *interval) | |
351 | { | |
352 | struct timespec t; | |
353 | int ret; | |
354 | mm_segment_t old_fs = get_fs (); | |
355 | ||
356 | set_fs (KERNEL_DS); | |
2b67fc46 HC |
357 | ret = sys_sched_rr_get_interval(pid, |
358 | (struct timespec __force __user *) &t); | |
1da177e4 LT |
359 | set_fs (old_fs); |
360 | if (put_compat_timespec(&t, interval)) | |
361 | return -EFAULT; | |
362 | return ret; | |
363 | } | |
364 | ||
365 | asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, | |
366 | compat_sigset_t __user *oset, size_t sigsetsize) | |
367 | { | |
368 | sigset_t s; | |
369 | compat_sigset_t s32; | |
370 | int ret; | |
371 | mm_segment_t old_fs = get_fs(); | |
372 | ||
373 | if (set) { | |
374 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) | |
375 | return -EFAULT; | |
376 | switch (_NSIG_WORDS) { | |
377 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); | |
378 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); | |
379 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); | |
380 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
381 | } | |
382 | } | |
383 | set_fs (KERNEL_DS); | |
d2c993d8 | 384 | ret = sys_rt_sigprocmask(how, |
2b67fc46 HC |
385 | set ? (sigset_t __force __user *) &s : NULL, |
386 | oset ? (sigset_t __force __user *) &s : NULL, | |
d2c993d8 | 387 | sigsetsize); |
1da177e4 LT |
388 | set_fs (old_fs); |
389 | if (ret) return ret; | |
390 | if (oset) { | |
391 | switch (_NSIG_WORDS) { | |
392 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
393 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
394 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
395 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
396 | } | |
397 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) | |
398 | return -EFAULT; | |
399 | } | |
400 | return 0; | |
401 | } | |
402 | ||
403 | asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, | |
404 | size_t sigsetsize) | |
405 | { | |
406 | sigset_t s; | |
407 | compat_sigset_t s32; | |
408 | int ret; | |
409 | mm_segment_t old_fs = get_fs(); | |
410 | ||
411 | set_fs (KERNEL_DS); | |
2b67fc46 | 412 | ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize); |
1da177e4 LT |
413 | set_fs (old_fs); |
414 | if (!ret) { | |
415 | switch (_NSIG_WORDS) { | |
416 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
417 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
418 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
419 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
420 | } | |
421 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) | |
422 | return -EFAULT; | |
423 | } | |
424 | return ret; | |
425 | } | |
426 | ||
427 | asmlinkage long | |
428 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
429 | { | |
430 | siginfo_t info; | |
431 | int ret; | |
432 | mm_segment_t old_fs = get_fs(); | |
433 | ||
434 | if (copy_siginfo_from_user32(&info, uinfo)) | |
435 | return -EFAULT; | |
436 | set_fs (KERNEL_DS); | |
2b67fc46 | 437 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info); |
1da177e4 LT |
438 | set_fs (old_fs); |
439 | return ret; | |
440 | } | |
441 | ||
442 | /* | |
443 | * sys32_execve() executes a new program after the asm stub has set | |
444 | * things up for us. This should basically do what I want it to. | |
445 | */ | |
03ff9a23 | 446 | asmlinkage long sys32_execve(void) |
1da177e4 | 447 | { |
03ff9a23 MS |
448 | struct pt_regs *regs = task_pt_regs(current); |
449 | char *filename; | |
450 | unsigned long result; | |
451 | int rc; | |
1da177e4 | 452 | |
03ff9a23 MS |
453 | filename = getname(compat_ptr(regs->orig_gpr2)); |
454 | if (IS_ERR(filename)) { | |
455 | result = PTR_ERR(filename); | |
1da177e4 | 456 | goto out; |
1da177e4 | 457 | } |
03ff9a23 MS |
458 | rc = compat_do_execve(filename, compat_ptr(regs->gprs[3]), |
459 | compat_ptr(regs->gprs[4]), regs); | |
460 | if (rc) { | |
461 | result = rc; | |
462 | goto out_putname; | |
463 | } | |
464 | task_lock(current); | |
465 | current->ptrace &= ~PT_DTRACE; | |
466 | task_unlock(current); | |
467 | current->thread.fp_regs.fpc=0; | |
468 | asm volatile("sfpc %0,0" : : "d" (0)); | |
469 | result = regs->gprs[2]; | |
470 | out_putname: | |
1da177e4 LT |
471 | putname(filename); |
472 | out: | |
03ff9a23 | 473 | return result; |
1da177e4 LT |
474 | } |
475 | ||
476 | ||
477 | #ifdef CONFIG_MODULES | |
478 | ||
479 | asmlinkage long | |
480 | sys32_init_module(void __user *umod, unsigned long len, | |
481 | const char __user *uargs) | |
482 | { | |
483 | return sys_init_module(umod, len, uargs); | |
484 | } | |
485 | ||
486 | asmlinkage long | |
487 | sys32_delete_module(const char __user *name_user, unsigned int flags) | |
488 | { | |
489 | return sys_delete_module(name_user, flags); | |
490 | } | |
491 | ||
492 | #else /* CONFIG_MODULES */ | |
493 | ||
494 | asmlinkage long | |
495 | sys32_init_module(void __user *umod, unsigned long len, | |
496 | const char __user *uargs) | |
497 | { | |
498 | return -ENOSYS; | |
499 | } | |
500 | ||
501 | asmlinkage long | |
502 | sys32_delete_module(const char __user *name_user, unsigned int flags) | |
503 | { | |
504 | return -ENOSYS; | |
505 | } | |
506 | ||
507 | #endif /* CONFIG_MODULES */ | |
508 | ||
24954a14 | 509 | asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf, |
1da177e4 LT |
510 | size_t count, u32 poshi, u32 poslo) |
511 | { | |
512 | if ((compat_ssize_t) count < 0) | |
513 | return -EINVAL; | |
514 | return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
515 | } | |
516 | ||
24954a14 | 517 | asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf, |
1da177e4 LT |
518 | size_t count, u32 poshi, u32 poslo) |
519 | { | |
520 | if ((compat_ssize_t) count < 0) | |
521 | return -EINVAL; | |
522 | return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
523 | } | |
524 | ||
525 | asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count) | |
526 | { | |
527 | return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count); | |
528 | } | |
529 | ||
24954a14 | 530 | asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count) |
1da177e4 LT |
531 | { |
532 | mm_segment_t old_fs = get_fs(); | |
533 | int ret; | |
534 | off_t of; | |
535 | ||
536 | if (offset && get_user(of, offset)) | |
537 | return -EFAULT; | |
538 | ||
539 | set_fs(KERNEL_DS); | |
d2c993d8 | 540 | ret = sys_sendfile(out_fd, in_fd, |
2b67fc46 | 541 | offset ? (off_t __force __user *) &of : NULL, count); |
1da177e4 LT |
542 | set_fs(old_fs); |
543 | ||
83b942bd | 544 | if (offset && put_user(of, offset)) |
1da177e4 LT |
545 | return -EFAULT; |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
550 | asmlinkage long sys32_sendfile64(int out_fd, int in_fd, | |
24954a14 | 551 | compat_loff_t __user *offset, s32 count) |
1da177e4 LT |
552 | { |
553 | mm_segment_t old_fs = get_fs(); | |
554 | int ret; | |
555 | loff_t lof; | |
556 | ||
557 | if (offset && get_user(lof, offset)) | |
558 | return -EFAULT; | |
559 | ||
560 | set_fs(KERNEL_DS); | |
d2c993d8 | 561 | ret = sys_sendfile64(out_fd, in_fd, |
2b67fc46 HC |
562 | offset ? (loff_t __force __user *) &lof : NULL, |
563 | count); | |
1da177e4 LT |
564 | set_fs(old_fs); |
565 | ||
566 | if (offset && put_user(lof, offset)) | |
567 | return -EFAULT; | |
568 | ||
569 | return ret; | |
570 | } | |
571 | ||
b89a8171 | 572 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
573 | struct __sysctl_args32 { |
574 | u32 name; | |
575 | int nlen; | |
576 | u32 oldval; | |
577 | u32 oldlenp; | |
578 | u32 newval; | |
579 | u32 newlen; | |
580 | u32 __unused[4]; | |
581 | }; | |
582 | ||
24954a14 | 583 | asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args) |
1da177e4 LT |
584 | { |
585 | struct __sysctl_args32 tmp; | |
586 | int error; | |
24954a14 AV |
587 | size_t oldlen; |
588 | size_t __user *oldlenp = NULL; | |
589 | unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; | |
1da177e4 LT |
590 | |
591 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
592 | return -EFAULT; | |
593 | ||
594 | if (tmp.oldval && tmp.oldlenp) { | |
595 | /* Duh, this is ugly and might not work if sysctl_args | |
596 | is in read-only memory, but do_sysctl does indirectly | |
597 | a lot of uaccess in both directions and we'd have to | |
598 | basically copy the whole sysctl.c here, and | |
599 | glibc's __sysctl uses rw memory for the structure | |
600 | anyway. */ | |
24954a14 AV |
601 | if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) || |
602 | put_user(oldlen, (size_t __user *)addr)) | |
1da177e4 | 603 | return -EFAULT; |
24954a14 | 604 | oldlenp = (size_t __user *)addr; |
1da177e4 LT |
605 | } |
606 | ||
607 | lock_kernel(); | |
24954a14 AV |
608 | error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval), |
609 | oldlenp, compat_ptr(tmp.newval), tmp.newlen); | |
1da177e4 LT |
610 | unlock_kernel(); |
611 | if (oldlenp) { | |
612 | if (!error) { | |
24954a14 AV |
613 | if (get_user(oldlen, (size_t __user *)addr) || |
614 | put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp))) | |
1da177e4 LT |
615 | error = -EFAULT; |
616 | } | |
12bae235 HC |
617 | if (copy_to_user(args->__unused, tmp.__unused, |
618 | sizeof(tmp.__unused))) | |
619 | error = -EFAULT; | |
1da177e4 LT |
620 | } |
621 | return error; | |
622 | } | |
623 | #endif | |
624 | ||
625 | struct stat64_emu31 { | |
626 | unsigned long long st_dev; | |
627 | unsigned int __pad1; | |
628 | #define STAT64_HAS_BROKEN_ST_INO 1 | |
629 | u32 __st_ino; | |
630 | unsigned int st_mode; | |
631 | unsigned int st_nlink; | |
632 | u32 st_uid; | |
633 | u32 st_gid; | |
634 | unsigned long long st_rdev; | |
635 | unsigned int __pad3; | |
636 | long st_size; | |
637 | u32 st_blksize; | |
638 | unsigned char __pad4[4]; | |
639 | u32 __pad5; /* future possible st_blocks high bits */ | |
640 | u32 st_blocks; /* Number 512-byte blocks allocated. */ | |
641 | u32 st_atime; | |
642 | u32 __pad6; | |
643 | u32 st_mtime; | |
644 | u32 __pad7; | |
645 | u32 st_ctime; | |
646 | u32 __pad8; /* will be high 32 bits of ctime someday */ | |
647 | unsigned long st_ino; | |
648 | }; | |
649 | ||
24954a14 | 650 | static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat) |
1da177e4 LT |
651 | { |
652 | struct stat64_emu31 tmp; | |
653 | ||
654 | memset(&tmp, 0, sizeof(tmp)); | |
655 | ||
656 | tmp.st_dev = huge_encode_dev(stat->dev); | |
657 | tmp.st_ino = stat->ino; | |
658 | tmp.__st_ino = (u32)stat->ino; | |
659 | tmp.st_mode = stat->mode; | |
660 | tmp.st_nlink = (unsigned int)stat->nlink; | |
661 | tmp.st_uid = stat->uid; | |
662 | tmp.st_gid = stat->gid; | |
663 | tmp.st_rdev = huge_encode_dev(stat->rdev); | |
664 | tmp.st_size = stat->size; | |
665 | tmp.st_blksize = (u32)stat->blksize; | |
666 | tmp.st_blocks = (u32)stat->blocks; | |
667 | tmp.st_atime = (u32)stat->atime.tv_sec; | |
668 | tmp.st_mtime = (u32)stat->mtime.tv_sec; | |
669 | tmp.st_ctime = (u32)stat->ctime.tv_sec; | |
670 | ||
671 | return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; | |
672 | } | |
673 | ||
24954a14 | 674 | asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
675 | { |
676 | struct kstat stat; | |
677 | int ret = vfs_stat(filename, &stat); | |
678 | if (!ret) | |
679 | ret = cp_stat64(statbuf, &stat); | |
680 | return ret; | |
681 | } | |
682 | ||
24954a14 | 683 | asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
684 | { |
685 | struct kstat stat; | |
686 | int ret = vfs_lstat(filename, &stat); | |
687 | if (!ret) | |
688 | ret = cp_stat64(statbuf, &stat); | |
689 | return ret; | |
690 | } | |
691 | ||
24954a14 | 692 | asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf) |
1da177e4 LT |
693 | { |
694 | struct kstat stat; | |
695 | int ret = vfs_fstat(fd, &stat); | |
696 | if (!ret) | |
697 | ret = cp_stat64(statbuf, &stat); | |
698 | return ret; | |
699 | } | |
700 | ||
ed3d021b HC |
701 | asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename, |
702 | struct stat64_emu31 __user* statbuf, int flag) | |
19bf9cbf HC |
703 | { |
704 | struct kstat stat; | |
705 | int error = -EINVAL; | |
706 | ||
707 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
708 | goto out; | |
709 | ||
710 | if (flag & AT_SYMLINK_NOFOLLOW) | |
711 | error = vfs_lstat_fd(dfd, filename, &stat); | |
712 | else | |
713 | error = vfs_stat_fd(dfd, filename, &stat); | |
714 | ||
715 | if (!error) | |
716 | error = cp_stat64(statbuf, &stat); | |
717 | out: | |
718 | return error; | |
719 | } | |
720 | ||
1da177e4 LT |
721 | /* |
722 | * Linux/i386 didn't use to be able to handle more than | |
723 | * 4 system call parameters, so these system calls used a memory | |
724 | * block for parameter passing.. | |
725 | */ | |
726 | ||
727 | struct mmap_arg_struct_emu31 { | |
728 | u32 addr; | |
729 | u32 len; | |
730 | u32 prot; | |
731 | u32 flags; | |
732 | u32 fd; | |
733 | u32 offset; | |
734 | }; | |
735 | ||
736 | /* common code for old and new mmaps */ | |
737 | static inline long do_mmap2( | |
738 | unsigned long addr, unsigned long len, | |
739 | unsigned long prot, unsigned long flags, | |
740 | unsigned long fd, unsigned long pgoff) | |
741 | { | |
742 | struct file * file = NULL; | |
743 | unsigned long error = -EBADF; | |
744 | ||
745 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
746 | if (!(flags & MAP_ANONYMOUS)) { | |
747 | file = fget(fd); | |
748 | if (!file) | |
749 | goto out; | |
750 | } | |
751 | ||
752 | down_write(¤t->mm->mmap_sem); | |
753 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
754 | if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) { | |
755 | /* Result is out of bounds. */ | |
756 | do_munmap(current->mm, addr, len); | |
757 | error = -ENOMEM; | |
758 | } | |
759 | up_write(¤t->mm->mmap_sem); | |
760 | ||
761 | if (file) | |
762 | fput(file); | |
763 | out: | |
764 | return error; | |
765 | } | |
766 | ||
767 | ||
768 | asmlinkage unsigned long | |
24954a14 | 769 | old32_mmap(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
770 | { |
771 | struct mmap_arg_struct_emu31 a; | |
772 | int error = -EFAULT; | |
773 | ||
774 | if (copy_from_user(&a, arg, sizeof(a))) | |
775 | goto out; | |
776 | ||
777 | error = -EINVAL; | |
778 | if (a.offset & ~PAGE_MASK) | |
779 | goto out; | |
780 | ||
781 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT); | |
782 | out: | |
783 | return error; | |
784 | } | |
785 | ||
786 | asmlinkage long | |
24954a14 | 787 | sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg) |
1da177e4 LT |
788 | { |
789 | struct mmap_arg_struct_emu31 a; | |
790 | int error = -EFAULT; | |
791 | ||
792 | if (copy_from_user(&a, arg, sizeof(a))) | |
793 | goto out; | |
794 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); | |
795 | out: | |
796 | return error; | |
797 | } | |
798 | ||
24954a14 | 799 | asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
800 | { |
801 | if ((compat_ssize_t) count < 0) | |
802 | return -EINVAL; | |
803 | ||
804 | return sys_read(fd, buf, count); | |
805 | } | |
806 | ||
24954a14 | 807 | asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count) |
1da177e4 LT |
808 | { |
809 | if ((compat_ssize_t) count < 0) | |
810 | return -EINVAL; | |
811 | ||
812 | return sys_write(fd, buf, count); | |
813 | } | |
814 | ||
03ff9a23 | 815 | asmlinkage long sys32_clone(void) |
1da177e4 | 816 | { |
03ff9a23 MS |
817 | struct pt_regs *regs = task_pt_regs(current); |
818 | unsigned long clone_flags; | |
819 | unsigned long newsp; | |
24954a14 | 820 | int __user *parent_tidptr, *child_tidptr; |
1da177e4 | 821 | |
03ff9a23 MS |
822 | clone_flags = regs->gprs[3] & 0xffffffffUL; |
823 | newsp = regs->orig_gpr2 & 0x7fffffffUL; | |
824 | parent_tidptr = compat_ptr(regs->gprs[4]); | |
825 | child_tidptr = compat_ptr(regs->gprs[5]); | |
826 | if (!newsp) | |
827 | newsp = regs->gprs[15]; | |
828 | return do_fork(clone_flags, newsp, regs, 0, | |
1da177e4 LT |
829 | parent_tidptr, child_tidptr); |
830 | } | |
831 | ||
068e1b94 MS |
832 | /* |
833 | * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64. | |
834 | * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE} | |
835 | * because the 31 bit values differ from the 64 bit values. | |
836 | */ | |
837 | ||
838 | asmlinkage long | |
839 | sys32_fadvise64(int fd, loff_t offset, size_t len, int advise) | |
840 | { | |
841 | if (advise == 4) | |
842 | advise = POSIX_FADV_DONTNEED; | |
843 | else if (advise == 5) | |
844 | advise = POSIX_FADV_NOREUSE; | |
845 | return sys_fadvise64(fd, offset, len, advise); | |
846 | } | |
847 | ||
848 | struct fadvise64_64_args { | |
849 | int fd; | |
850 | long long offset; | |
851 | long long len; | |
852 | int advice; | |
853 | }; | |
854 | ||
855 | asmlinkage long | |
856 | sys32_fadvise64_64(struct fadvise64_64_args __user *args) | |
857 | { | |
858 | struct fadvise64_64_args a; | |
859 | ||
860 | if ( copy_from_user(&a, args, sizeof(a)) ) | |
861 | return -EFAULT; | |
862 | if (a.advice == 4) | |
863 | a.advice = POSIX_FADV_DONTNEED; | |
864 | else if (a.advice == 5) | |
865 | a.advice = POSIX_FADV_NOREUSE; | |
866 | return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); | |
867 | } |