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1/*
2 * S390 version
3 * Copyright IBM Corp. 2000
4 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
5 * Gerhard Tonn (ton@de.ibm.com)
6 * Thomas Spatzier (tspat@de.ibm.com)
7 *
8 * Conversion between 31bit and 64bit native syscalls.
9 *
10 * Heavily inspired by the 32-bit Sparc compat code which is
11 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
12 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
13 *
14 */
15
16
17#include <linux/kernel.h>
18#include <linux/sched.h>
19#include <linux/fs.h>
20#include <linux/mm.h>
21#include <linux/file.h>
22#include <linux/signal.h>
23#include <linux/resource.h>
24#include <linux/times.h>
25#include <linux/smp.h>
26#include <linux/sem.h>
27#include <linux/msg.h>
28#include <linux/shm.h>
29#include <linux/uio.h>
30#include <linux/quota.h>
31#include <linux/module.h>
32#include <linux/poll.h>
33#include <linux/personality.h>
34#include <linux/stat.h>
35#include <linux/filter.h>
36#include <linux/highmem.h>
37#include <linux/highuid.h>
38#include <linux/mman.h>
39#include <linux/ipv6.h>
40#include <linux/in.h>
41#include <linux/icmpv6.h>
42#include <linux/syscalls.h>
43#include <linux/sysctl.h>
44#include <linux/binfmts.h>
45#include <linux/capability.h>
46#include <linux/compat.h>
47#include <linux/vfs.h>
48#include <linux/ptrace.h>
49#include <linux/fadvise.h>
50#include <linux/ipc.h>
51#include <linux/slab.h>
52
53#include <asm/types.h>
54#include <linux/uaccess.h>
55
56#include <net/scm.h>
57#include <net/sock.h>
58
59#include "compat_linux.h"
60
61/* For this source file, we want overflow handling. */
62
63#undef high2lowuid
64#undef high2lowgid
65#undef low2highuid
66#undef low2highgid
67#undef SET_UID16
68#undef SET_GID16
69#undef NEW_TO_OLD_UID
70#undef NEW_TO_OLD_GID
71#undef SET_OLDSTAT_UID
72#undef SET_OLDSTAT_GID
73#undef SET_STAT_UID
74#undef SET_STAT_GID
75
76#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
77#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
78#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
79#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
80#define SET_UID16(var, uid) var = high2lowuid(uid)
81#define SET_GID16(var, gid) var = high2lowgid(gid)
82#define NEW_TO_OLD_UID(uid) high2lowuid(uid)
83#define NEW_TO_OLD_GID(gid) high2lowgid(gid)
84#define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
85#define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
86#define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
87#define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
88
89COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
90 u16, user, u16, group)
91{
92 return sys_chown(filename, low2highuid(user), low2highgid(group));
93}
94
95COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *,
96 filename, u16, user, u16, group)
97{
98 return sys_lchown(filename, low2highuid(user), low2highgid(group));
99}
100
101COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group)
102{
103 return sys_fchown(fd, low2highuid(user), low2highgid(group));
104}
105
106COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid)
107{
108 return sys_setregid(low2highgid(rgid), low2highgid(egid));
109}
110
111COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid)
112{
113 return sys_setgid((gid_t)gid);
114}
115
116COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid)
117{
118 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
119}
120
121COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid)
122{
123 return sys_setuid((uid_t)uid);
124}
125
126COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid)
127{
128 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
129 low2highuid(suid));
130}
131
132COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp,
133 u16 __user *, euidp, u16 __user *, suidp)
134{
135 const struct cred *cred = current_cred();
136 int retval;
137 u16 ruid, euid, suid;
138
139 ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
140 euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
141 suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
142
143 if (!(retval = put_user(ruid, ruidp)) &&
144 !(retval = put_user(euid, euidp)))
145 retval = put_user(suid, suidp);
146
147 return retval;
148}
149
150COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid)
151{
152 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
153 low2highgid(sgid));
154}
155
156COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp,
157 u16 __user *, egidp, u16 __user *, sgidp)
158{
159 const struct cred *cred = current_cred();
160 int retval;
161 u16 rgid, egid, sgid;
162
163 rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
164 egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
165 sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
166
167 if (!(retval = put_user(rgid, rgidp)) &&
168 !(retval = put_user(egid, egidp)))
169 retval = put_user(sgid, sgidp);
170
171 return retval;
172}
173
174COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid)
175{
176 return sys_setfsuid((uid_t)uid);
177}
178
179COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid)
180{
181 return sys_setfsgid((gid_t)gid);
182}
183
184static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
185{
186 struct user_namespace *user_ns = current_user_ns();
187 int i;
188 u16 group;
189 kgid_t kgid;
190
191 for (i = 0; i < group_info->ngroups; i++) {
192 kgid = group_info->gid[i];
193 group = (u16)from_kgid_munged(user_ns, kgid);
194 if (put_user(group, grouplist+i))
195 return -EFAULT;
196 }
197
198 return 0;
199}
200
201static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
202{
203 struct user_namespace *user_ns = current_user_ns();
204 int i;
205 u16 group;
206 kgid_t kgid;
207
208 for (i = 0; i < group_info->ngroups; i++) {
209 if (get_user(group, grouplist+i))
210 return -EFAULT;
211
212 kgid = make_kgid(user_ns, (gid_t)group);
213 if (!gid_valid(kgid))
214 return -EINVAL;
215
216 group_info->gid[i] = kgid;
217 }
218
219 return 0;
220}
221
222COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist)
223{
224 const struct cred *cred = current_cred();
225 int i;
226
227 if (gidsetsize < 0)
228 return -EINVAL;
229
230 get_group_info(cred->group_info);
231 i = cred->group_info->ngroups;
232 if (gidsetsize) {
233 if (i > gidsetsize) {
234 i = -EINVAL;
235 goto out;
236 }
237 if (groups16_to_user(grouplist, cred->group_info)) {
238 i = -EFAULT;
239 goto out;
240 }
241 }
242out:
243 put_group_info(cred->group_info);
244 return i;
245}
246
247COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist)
248{
249 struct group_info *group_info;
250 int retval;
251
252 if (!may_setgroups())
253 return -EPERM;
254 if ((unsigned)gidsetsize > NGROUPS_MAX)
255 return -EINVAL;
256
257 group_info = groups_alloc(gidsetsize);
258 if (!group_info)
259 return -ENOMEM;
260 retval = groups16_from_user(group_info, grouplist);
261 if (retval) {
262 put_group_info(group_info);
263 return retval;
264 }
265
266 retval = set_current_groups(group_info);
267 put_group_info(group_info);
268
269 return retval;
270}
271
272COMPAT_SYSCALL_DEFINE0(s390_getuid16)
273{
274 return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
275}
276
277COMPAT_SYSCALL_DEFINE0(s390_geteuid16)
278{
279 return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
280}
281
282COMPAT_SYSCALL_DEFINE0(s390_getgid16)
283{
284 return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
285}
286
287COMPAT_SYSCALL_DEFINE0(s390_getegid16)
288{
289 return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
290}
291
292#ifdef CONFIG_SYSVIPC
293COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
294 compat_ulong_t, third, compat_uptr_t, ptr)
295{
296 if (call >> 16) /* hack for backward compatibility */
297 return -EINVAL;
298 return compat_sys_ipc(call, first, second, third, ptr, third);
299}
300#endif
301
302COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low)
303{
304 return sys_truncate(path, (unsigned long)high << 32 | low);
305}
306
307COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low)
308{
309 return sys_ftruncate(fd, (unsigned long)high << 32 | low);
310}
311
312COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf,
313 compat_size_t, count, u32, high, u32, low)
314{
315 if ((compat_ssize_t) count < 0)
316 return -EINVAL;
317 return sys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low);
318}
319
320COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf,
321 compat_size_t, count, u32, high, u32, low)
322{
323 if ((compat_ssize_t) count < 0)
324 return -EINVAL;
325 return sys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low);
326}
327
328COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count)
329{
330 return sys_readahead(fd, (unsigned long)high << 32 | low, count);
331}
332
333struct stat64_emu31 {
334 unsigned long long st_dev;
335 unsigned int __pad1;
336#define STAT64_HAS_BROKEN_ST_INO 1
337 u32 __st_ino;
338 unsigned int st_mode;
339 unsigned int st_nlink;
340 u32 st_uid;
341 u32 st_gid;
342 unsigned long long st_rdev;
343 unsigned int __pad3;
344 long st_size;
345 u32 st_blksize;
346 unsigned char __pad4[4];
347 u32 __pad5; /* future possible st_blocks high bits */
348 u32 st_blocks; /* Number 512-byte blocks allocated. */
349 u32 st_atime;
350 u32 __pad6;
351 u32 st_mtime;
352 u32 __pad7;
353 u32 st_ctime;
354 u32 __pad8; /* will be high 32 bits of ctime someday */
355 unsigned long st_ino;
356};
357
358static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
359{
360 struct stat64_emu31 tmp;
361
362 memset(&tmp, 0, sizeof(tmp));
363
364 tmp.st_dev = huge_encode_dev(stat->dev);
365 tmp.st_ino = stat->ino;
366 tmp.__st_ino = (u32)stat->ino;
367 tmp.st_mode = stat->mode;
368 tmp.st_nlink = (unsigned int)stat->nlink;
369 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
370 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
371 tmp.st_rdev = huge_encode_dev(stat->rdev);
372 tmp.st_size = stat->size;
373 tmp.st_blksize = (u32)stat->blksize;
374 tmp.st_blocks = (u32)stat->blocks;
375 tmp.st_atime = (u32)stat->atime.tv_sec;
376 tmp.st_mtime = (u32)stat->mtime.tv_sec;
377 tmp.st_ctime = (u32)stat->ctime.tv_sec;
378
379 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
380}
381
382COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
383{
384 struct kstat stat;
385 int ret = vfs_stat(filename, &stat);
386 if (!ret)
387 ret = cp_stat64(statbuf, &stat);
388 return ret;
389}
390
391COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
392{
393 struct kstat stat;
394 int ret = vfs_lstat(filename, &stat);
395 if (!ret)
396 ret = cp_stat64(statbuf, &stat);
397 return ret;
398}
399
400COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf)
401{
402 struct kstat stat;
403 int ret = vfs_fstat(fd, &stat);
404 if (!ret)
405 ret = cp_stat64(statbuf, &stat);
406 return ret;
407}
408
409COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename,
410 struct stat64_emu31 __user *, statbuf, int, flag)
411{
412 struct kstat stat;
413 int error;
414
415 error = vfs_fstatat(dfd, filename, &stat, flag);
416 if (error)
417 return error;
418 return cp_stat64(statbuf, &stat);
419}
420
421/*
422 * Linux/i386 didn't use to be able to handle more than
423 * 4 system call parameters, so these system calls used a memory
424 * block for parameter passing..
425 */
426
427struct mmap_arg_struct_emu31 {
428 compat_ulong_t addr;
429 compat_ulong_t len;
430 compat_ulong_t prot;
431 compat_ulong_t flags;
432 compat_ulong_t fd;
433 compat_ulong_t offset;
434};
435
436COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg)
437{
438 struct mmap_arg_struct_emu31 a;
439
440 if (copy_from_user(&a, arg, sizeof(a)))
441 return -EFAULT;
442 if (a.offset & ~PAGE_MASK)
443 return -EINVAL;
444 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
445 a.offset >> PAGE_SHIFT);
446}
447
448COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg)
449{
450 struct mmap_arg_struct_emu31 a;
451
452 if (copy_from_user(&a, arg, sizeof(a)))
453 return -EFAULT;
454 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
455}
456
457COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count)
458{
459 if ((compat_ssize_t) count < 0)
460 return -EINVAL;
461
462 return sys_read(fd, buf, count);
463}
464
465COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count)
466{
467 if ((compat_ssize_t) count < 0)
468 return -EINVAL;
469
470 return sys_write(fd, buf, count);
471}
472
473/*
474 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
475 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
476 * because the 31 bit values differ from the 64 bit values.
477 */
478
479COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise)
480{
481 if (advise == 4)
482 advise = POSIX_FADV_DONTNEED;
483 else if (advise == 5)
484 advise = POSIX_FADV_NOREUSE;
485 return sys_fadvise64(fd, (unsigned long)high << 32 | low, len, advise);
486}
487
488struct fadvise64_64_args {
489 int fd;
490 long long offset;
491 long long len;
492 int advice;
493};
494
495COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
496{
497 struct fadvise64_64_args a;
498
499 if ( copy_from_user(&a, args, sizeof(a)) )
500 return -EFAULT;
501 if (a.advice == 4)
502 a.advice = POSIX_FADV_DONTNEED;
503 else if (a.advice == 5)
504 a.advice = POSIX_FADV_NOREUSE;
505 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
506}
507
508COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow,
509 u32, nhigh, u32, nlow, unsigned int, flags)
510{
511 return sys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow,
512 ((u64)nhigh << 32) + nlow, flags);
513}
514
515COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd, int, mode, u32, offhigh, u32, offlow,
516 u32, lenhigh, u32, lenlow)
517{
518 return sys_fallocate(fd, mode, ((loff_t)offhigh << 32) + offlow,
519 ((u64)lenhigh << 32) + lenlow);
520}
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
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/smp.h>
28#include <linux/sem.h>
29#include <linux/msg.h>
30#include <linux/shm.h>
31#include <linux/uio.h>
32#include <linux/quota.h>
33#include <linux/module.h>
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>
47#include <linux/capability.h>
48#include <linux/compat.h>
49#include <linux/vfs.h>
50#include <linux/ptrace.h>
51#include <linux/fadvise.h>
52#include <linux/ipc.h>
53#include <linux/slab.h>
54
55#include <asm/types.h>
56#include <asm/uaccess.h>
57
58#include <net/scm.h>
59#include <net/sock.h>
60
61#include "compat_linux.h"
62
63u32 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;
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
95asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
96{
97 return sys_chown(filename, low2highuid(user), low2highgid(group));
98}
99
100asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
101{
102 return sys_lchown(filename, low2highuid(user), low2highgid(group));
103}
104
105asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
106{
107 return sys_fchown(fd, low2highuid(user), low2highgid(group));
108}
109
110asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
111{
112 return sys_setregid(low2highgid(rgid), low2highgid(egid));
113}
114
115asmlinkage long sys32_setgid16(u16 gid)
116{
117 return sys_setgid((gid_t)gid);
118}
119
120asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
121{
122 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
123}
124
125asmlinkage long sys32_setuid16(u16 uid)
126{
127 return sys_setuid((uid_t)uid);
128}
129
130asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
131{
132 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
133 low2highuid(suid));
134}
135
136asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
137{
138 int retval;
139
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);
143
144 return retval;
145}
146
147asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
148{
149 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
150 low2highgid(sgid));
151}
152
153asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
154{
155 int retval;
156
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);
160
161 return retval;
162}
163
164asmlinkage long sys32_setfsuid16(u16 uid)
165{
166 return sys_setfsuid((uid_t)uid);
167}
168
169asmlinkage long sys32_setfsgid16(u16 gid)
170{
171 return sys_setfsgid((gid_t)gid);
172}
173
174static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
175{
176 struct user_namespace *user_ns = current_user_ns();
177 int i;
178 u16 group;
179 kgid_t kgid;
180
181 for (i = 0; i < group_info->ngroups; i++) {
182 kgid = GROUP_AT(group_info, i);
183 group = (u16)from_kgid_munged(user_ns, kgid);
184 if (put_user(group, grouplist+i))
185 return -EFAULT;
186 }
187
188 return 0;
189}
190
191static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
192{
193 struct user_namespace *user_ns = current_user_ns();
194 int i;
195 u16 group;
196 kgid_t kgid;
197
198 for (i = 0; i < group_info->ngroups; i++) {
199 if (get_user(group, grouplist+i))
200 return -EFAULT;
201
202 kgid = make_kgid(user_ns, (gid_t)group);
203 if (!gid_valid(kgid))
204 return -EINVAL;
205
206 GROUP_AT(group_info, i) = kgid;
207 }
208
209 return 0;
210}
211
212asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
213{
214 int i;
215
216 if (gidsetsize < 0)
217 return -EINVAL;
218
219 get_group_info(current->cred->group_info);
220 i = current->cred->group_info->ngroups;
221 if (gidsetsize) {
222 if (i > gidsetsize) {
223 i = -EINVAL;
224 goto out;
225 }
226 if (groups16_to_user(grouplist, current->cred->group_info)) {
227 i = -EFAULT;
228 goto out;
229 }
230 }
231out:
232 put_group_info(current->cred->group_info);
233 return i;
234}
235
236asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
237{
238 struct group_info *group_info;
239 int retval;
240
241 if (!capable(CAP_SETGID))
242 return -EPERM;
243 if ((unsigned)gidsetsize > NGROUPS_MAX)
244 return -EINVAL;
245
246 group_info = groups_alloc(gidsetsize);
247 if (!group_info)
248 return -ENOMEM;
249 retval = groups16_from_user(group_info, grouplist);
250 if (retval) {
251 put_group_info(group_info);
252 return retval;
253 }
254
255 retval = set_current_groups(group_info);
256 put_group_info(group_info);
257
258 return retval;
259}
260
261asmlinkage long sys32_getuid16(void)
262{
263 return high2lowuid(current->cred->uid);
264}
265
266asmlinkage long sys32_geteuid16(void)
267{
268 return high2lowuid(current->cred->euid);
269}
270
271asmlinkage long sys32_getgid16(void)
272{
273 return high2lowgid(current->cred->gid);
274}
275
276asmlinkage long sys32_getegid16(void)
277{
278 return high2lowgid(current->cred->egid);
279}
280
281/*
282 * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation.
283 *
284 * This is really horribly ugly.
285 */
286#ifdef CONFIG_SYSVIPC
287asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
288{
289 if (call >> 16) /* hack for backward compatibility */
290 return -EINVAL;
291 switch (call) {
292 case SEMTIMEDOP:
293 return compat_sys_semtimedop(first, compat_ptr(ptr),
294 second, compat_ptr(third));
295 case SEMOP:
296 /* struct sembuf is the same on 32 and 64bit :)) */
297 return sys_semtimedop(first, compat_ptr(ptr),
298 second, NULL);
299 case SEMGET:
300 return sys_semget(first, second, third);
301 case SEMCTL:
302 return compat_sys_semctl(first, second, third,
303 compat_ptr(ptr));
304 case MSGSND:
305 return compat_sys_msgsnd(first, second, third,
306 compat_ptr(ptr));
307 case MSGRCV:
308 return compat_sys_msgrcv(first, second, 0, third,
309 0, compat_ptr(ptr));
310 case MSGGET:
311 return sys_msgget((key_t) first, second);
312 case MSGCTL:
313 return compat_sys_msgctl(first, second, compat_ptr(ptr));
314 case SHMAT:
315 return compat_sys_shmat(first, second, third,
316 0, compat_ptr(ptr));
317 case SHMDT:
318 return sys_shmdt(compat_ptr(ptr));
319 case SHMGET:
320 return sys_shmget(first, (unsigned)second, third);
321 case SHMCTL:
322 return compat_sys_shmctl(first, second, compat_ptr(ptr));
323 }
324
325 return -ENOSYS;
326}
327#endif
328
329asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
330{
331 if ((int)high < 0)
332 return -EINVAL;
333 else
334 return sys_truncate(path, (high << 32) | low);
335}
336
337asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
338{
339 if ((int)high < 0)
340 return -EINVAL;
341 else
342 return sys_ftruncate(fd, (high << 32) | low);
343}
344
345asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
346 struct compat_timespec __user *interval)
347{
348 struct timespec t;
349 int ret;
350 mm_segment_t old_fs = get_fs ();
351
352 set_fs (KERNEL_DS);
353 ret = sys_sched_rr_get_interval(pid,
354 (struct timespec __force __user *) &t);
355 set_fs (old_fs);
356 if (put_compat_timespec(&t, interval))
357 return -EFAULT;
358 return ret;
359}
360
361asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
362 compat_sigset_t __user *oset, size_t sigsetsize)
363{
364 sigset_t s;
365 compat_sigset_t s32;
366 int ret;
367 mm_segment_t old_fs = get_fs();
368
369 if (set) {
370 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
371 return -EFAULT;
372 s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
373 }
374 set_fs (KERNEL_DS);
375 ret = sys_rt_sigprocmask(how,
376 set ? (sigset_t __force __user *) &s : NULL,
377 oset ? (sigset_t __force __user *) &s : NULL,
378 sigsetsize);
379 set_fs (old_fs);
380 if (ret) return ret;
381 if (oset) {
382 s32.sig[1] = (s.sig[0] >> 32);
383 s32.sig[0] = s.sig[0];
384 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
385 return -EFAULT;
386 }
387 return 0;
388}
389
390asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
391 size_t sigsetsize)
392{
393 sigset_t s;
394 compat_sigset_t s32;
395 int ret;
396 mm_segment_t old_fs = get_fs();
397
398 set_fs (KERNEL_DS);
399 ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize);
400 set_fs (old_fs);
401 if (!ret) {
402 s32.sig[1] = (s.sig[0] >> 32);
403 s32.sig[0] = s.sig[0];
404 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
405 return -EFAULT;
406 }
407 return ret;
408}
409
410asmlinkage long
411sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
412{
413 siginfo_t info;
414 int ret;
415 mm_segment_t old_fs = get_fs();
416
417 if (copy_siginfo_from_user32(&info, uinfo))
418 return -EFAULT;
419 set_fs (KERNEL_DS);
420 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info);
421 set_fs (old_fs);
422 return ret;
423}
424
425/*
426 * sys32_execve() executes a new program after the asm stub has set
427 * things up for us. This should basically do what I want it to.
428 */
429asmlinkage long sys32_execve(const char __user *name, compat_uptr_t __user *argv,
430 compat_uptr_t __user *envp)
431{
432 struct pt_regs *regs = task_pt_regs(current);
433 char *filename;
434 long rc;
435
436 filename = getname(name);
437 rc = PTR_ERR(filename);
438 if (IS_ERR(filename))
439 return rc;
440 rc = compat_do_execve(filename, argv, envp, regs);
441 if (rc)
442 goto out;
443 current->thread.fp_regs.fpc=0;
444 asm volatile("sfpc %0,0" : : "d" (0));
445 rc = regs->gprs[2];
446out:
447 putname(filename);
448 return rc;
449}
450
451asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
452 size_t count, u32 poshi, u32 poslo)
453{
454 if ((compat_ssize_t) count < 0)
455 return -EINVAL;
456 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
457}
458
459asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
460 size_t count, u32 poshi, u32 poslo)
461{
462 if ((compat_ssize_t) count < 0)
463 return -EINVAL;
464 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
465}
466
467asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
468{
469 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
470}
471
472asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
473{
474 mm_segment_t old_fs = get_fs();
475 int ret;
476 off_t of;
477
478 if (offset && get_user(of, offset))
479 return -EFAULT;
480
481 set_fs(KERNEL_DS);
482 ret = sys_sendfile(out_fd, in_fd,
483 offset ? (off_t __force __user *) &of : NULL, count);
484 set_fs(old_fs);
485
486 if (offset && put_user(of, offset))
487 return -EFAULT;
488
489 return ret;
490}
491
492asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
493 compat_loff_t __user *offset, s32 count)
494{
495 mm_segment_t old_fs = get_fs();
496 int ret;
497 loff_t lof;
498
499 if (offset && get_user(lof, offset))
500 return -EFAULT;
501
502 set_fs(KERNEL_DS);
503 ret = sys_sendfile64(out_fd, in_fd,
504 offset ? (loff_t __force __user *) &lof : NULL,
505 count);
506 set_fs(old_fs);
507
508 if (offset && put_user(lof, offset))
509 return -EFAULT;
510
511 return ret;
512}
513
514struct stat64_emu31 {
515 unsigned long long st_dev;
516 unsigned int __pad1;
517#define STAT64_HAS_BROKEN_ST_INO 1
518 u32 __st_ino;
519 unsigned int st_mode;
520 unsigned int st_nlink;
521 u32 st_uid;
522 u32 st_gid;
523 unsigned long long st_rdev;
524 unsigned int __pad3;
525 long st_size;
526 u32 st_blksize;
527 unsigned char __pad4[4];
528 u32 __pad5; /* future possible st_blocks high bits */
529 u32 st_blocks; /* Number 512-byte blocks allocated. */
530 u32 st_atime;
531 u32 __pad6;
532 u32 st_mtime;
533 u32 __pad7;
534 u32 st_ctime;
535 u32 __pad8; /* will be high 32 bits of ctime someday */
536 unsigned long st_ino;
537};
538
539static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
540{
541 struct stat64_emu31 tmp;
542
543 memset(&tmp, 0, sizeof(tmp));
544
545 tmp.st_dev = huge_encode_dev(stat->dev);
546 tmp.st_ino = stat->ino;
547 tmp.__st_ino = (u32)stat->ino;
548 tmp.st_mode = stat->mode;
549 tmp.st_nlink = (unsigned int)stat->nlink;
550 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
551 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
552 tmp.st_rdev = huge_encode_dev(stat->rdev);
553 tmp.st_size = stat->size;
554 tmp.st_blksize = (u32)stat->blksize;
555 tmp.st_blocks = (u32)stat->blocks;
556 tmp.st_atime = (u32)stat->atime.tv_sec;
557 tmp.st_mtime = (u32)stat->mtime.tv_sec;
558 tmp.st_ctime = (u32)stat->ctime.tv_sec;
559
560 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
561}
562
563asmlinkage long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
564{
565 struct kstat stat;
566 int ret = vfs_stat(filename, &stat);
567 if (!ret)
568 ret = cp_stat64(statbuf, &stat);
569 return ret;
570}
571
572asmlinkage long sys32_lstat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
573{
574 struct kstat stat;
575 int ret = vfs_lstat(filename, &stat);
576 if (!ret)
577 ret = cp_stat64(statbuf, &stat);
578 return ret;
579}
580
581asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
582{
583 struct kstat stat;
584 int ret = vfs_fstat(fd, &stat);
585 if (!ret)
586 ret = cp_stat64(statbuf, &stat);
587 return ret;
588}
589
590asmlinkage long sys32_fstatat64(unsigned int dfd, const char __user *filename,
591 struct stat64_emu31 __user* statbuf, int flag)
592{
593 struct kstat stat;
594 int error;
595
596 error = vfs_fstatat(dfd, filename, &stat, flag);
597 if (error)
598 return error;
599 return cp_stat64(statbuf, &stat);
600}
601
602/*
603 * Linux/i386 didn't use to be able to handle more than
604 * 4 system call parameters, so these system calls used a memory
605 * block for parameter passing..
606 */
607
608struct mmap_arg_struct_emu31 {
609 compat_ulong_t addr;
610 compat_ulong_t len;
611 compat_ulong_t prot;
612 compat_ulong_t flags;
613 compat_ulong_t fd;
614 compat_ulong_t offset;
615};
616
617asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
618{
619 struct mmap_arg_struct_emu31 a;
620
621 if (copy_from_user(&a, arg, sizeof(a)))
622 return -EFAULT;
623 if (a.offset & ~PAGE_MASK)
624 return -EINVAL;
625 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
626 a.offset >> PAGE_SHIFT);
627}
628
629asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
630{
631 struct mmap_arg_struct_emu31 a;
632
633 if (copy_from_user(&a, arg, sizeof(a)))
634 return -EFAULT;
635 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
636}
637
638asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
639{
640 if ((compat_ssize_t) count < 0)
641 return -EINVAL;
642
643 return sys_read(fd, buf, count);
644}
645
646asmlinkage long sys32_write(unsigned int fd, const char __user * buf, size_t count)
647{
648 if ((compat_ssize_t) count < 0)
649 return -EINVAL;
650
651 return sys_write(fd, buf, count);
652}
653
654/*
655 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
656 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
657 * because the 31 bit values differ from the 64 bit values.
658 */
659
660asmlinkage long
661sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
662{
663 if (advise == 4)
664 advise = POSIX_FADV_DONTNEED;
665 else if (advise == 5)
666 advise = POSIX_FADV_NOREUSE;
667 return sys_fadvise64(fd, offset, len, advise);
668}
669
670struct fadvise64_64_args {
671 int fd;
672 long long offset;
673 long long len;
674 int advice;
675};
676
677asmlinkage long
678sys32_fadvise64_64(struct fadvise64_64_args __user *args)
679{
680 struct fadvise64_64_args a;
681
682 if ( copy_from_user(&a, args, sizeof(a)) )
683 return -EFAULT;
684 if (a.advice == 4)
685 a.advice = POSIX_FADV_DONTNEED;
686 else if (a.advice == 5)
687 a.advice = POSIX_FADV_NOREUSE;
688 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
689}