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sparc: switch to use of generic old sigaction
[~andy/linux] / arch / sparc / kernel / sys_sparc32.c
1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
2  *
3  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
5  *
6  * These routines maintain argument size conversion between 32bit and 64bit
7  * environment.
8  */
9
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/capability.h>
13 #include <linux/fs.h> 
14 #include <linux/mm.h> 
15 #include <linux/file.h> 
16 #include <linux/signal.h>
17 #include <linux/resource.h>
18 #include <linux/times.h>
19 #include <linux/smp.h>
20 #include <linux/sem.h>
21 #include <linux/msg.h>
22 #include <linux/shm.h>
23 #include <linux/uio.h>
24 #include <linux/nfs_fs.h>
25 #include <linux/quota.h>
26 #include <linux/poll.h>
27 #include <linux/personality.h>
28 #include <linux/stat.h>
29 #include <linux/filter.h>
30 #include <linux/highmem.h>
31 #include <linux/highuid.h>
32 #include <linux/mman.h>
33 #include <linux/ipv6.h>
34 #include <linux/in.h>
35 #include <linux/icmpv6.h>
36 #include <linux/syscalls.h>
37 #include <linux/sysctl.h>
38 #include <linux/binfmts.h>
39 #include <linux/dnotify.h>
40 #include <linux/security.h>
41 #include <linux/compat.h>
42 #include <linux/vfs.h>
43 #include <linux/ptrace.h>
44 #include <linux/slab.h>
45
46 #include <asm/types.h>
47 #include <asm/uaccess.h>
48 #include <asm/fpumacro.h>
49 #include <asm/mmu_context.h>
50 #include <asm/compat_signal.h>
51
52 #ifdef CONFIG_SYSVIPC                                                        
53 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
54 {
55         int version;
56
57         version = call >> 16; /* hack for backward compatibility */
58         call &= 0xffff;
59
60         switch (call) {
61         case SEMTIMEDOP:
62                 if (fifth)
63                         /* sign extend semid */
64                         return compat_sys_semtimedop((int)first,
65                                                      compat_ptr(ptr), second,
66                                                      compat_ptr(fifth));
67                 /* else fall through for normal semop() */
68         case SEMOP:
69                 /* struct sembuf is the same on 32 and 64bit :)) */
70                 /* sign extend semid */
71                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
72                                       NULL);
73         case SEMGET:
74                 /* sign extend key, nsems */
75                 return sys_semget((int)first, (int)second, third);
76         case SEMCTL:
77                 /* sign extend semid, semnum */
78                 return compat_sys_semctl((int)first, (int)second, third,
79                                          compat_ptr(ptr));
80
81         case MSGSND:
82                 /* sign extend msqid */
83                 return compat_sys_msgsnd((int)first, (int)second, third,
84                                          compat_ptr(ptr));
85         case MSGRCV:
86                 /* sign extend msqid, msgtyp */
87                 return compat_sys_msgrcv((int)first, second, (int)fifth,
88                                          third, version, compat_ptr(ptr));
89         case MSGGET:
90                 /* sign extend key */
91                 return sys_msgget((int)first, second);
92         case MSGCTL:
93                 /* sign extend msqid */
94                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
95
96         case SHMAT:
97                 /* sign extend shmid */
98                 return compat_sys_shmat((int)first, second, third, version,
99                                         compat_ptr(ptr));
100         case SHMDT:
101                 return sys_shmdt(compat_ptr(ptr));
102         case SHMGET:
103                 /* sign extend key_t */
104                 return sys_shmget((int)first, second, third);
105         case SHMCTL:
106                 /* sign extend shmid */
107                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
108
109         default:
110                 return -ENOSYS;
111         }
112
113         return -ENOSYS;
114 }
115 #endif
116
117 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
118 {
119         if ((int)high < 0)
120                 return -EINVAL;
121         else
122                 return sys_truncate(path, (high << 32) | low);
123 }
124
125 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
126 {
127         if ((int)high < 0)
128                 return -EINVAL;
129         else
130                 return sys_ftruncate(fd, (high << 32) | low);
131 }
132
133 static int cp_compat_stat64(struct kstat *stat,
134                             struct compat_stat64 __user *statbuf)
135 {
136         int err;
137
138         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
139         err |= put_user(stat->ino, &statbuf->st_ino);
140         err |= put_user(stat->mode, &statbuf->st_mode);
141         err |= put_user(stat->nlink, &statbuf->st_nlink);
142         err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
143         err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
144         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
145         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
146         err |= put_user(stat->size, &statbuf->st_size);
147         err |= put_user(stat->blksize, &statbuf->st_blksize);
148         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
149         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
150         err |= put_user(stat->blocks, &statbuf->st_blocks);
151         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
152         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
153         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
154         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
155         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
156         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
157         err |= put_user(0, &statbuf->__unused4);
158         err |= put_user(0, &statbuf->__unused5);
159
160         return err;
161 }
162
163 asmlinkage long compat_sys_stat64(const char __user * filename,
164                 struct compat_stat64 __user *statbuf)
165 {
166         struct kstat stat;
167         int error = vfs_stat(filename, &stat);
168
169         if (!error)
170                 error = cp_compat_stat64(&stat, statbuf);
171         return error;
172 }
173
174 asmlinkage long compat_sys_lstat64(const char __user * filename,
175                 struct compat_stat64 __user *statbuf)
176 {
177         struct kstat stat;
178         int error = vfs_lstat(filename, &stat);
179
180         if (!error)
181                 error = cp_compat_stat64(&stat, statbuf);
182         return error;
183 }
184
185 asmlinkage long compat_sys_fstat64(unsigned int fd,
186                 struct compat_stat64 __user * statbuf)
187 {
188         struct kstat stat;
189         int error = vfs_fstat(fd, &stat);
190
191         if (!error)
192                 error = cp_compat_stat64(&stat, statbuf);
193         return error;
194 }
195
196 asmlinkage long compat_sys_fstatat64(unsigned int dfd,
197                 const char __user *filename,
198                 struct compat_stat64 __user * statbuf, int flag)
199 {
200         struct kstat stat;
201         int error;
202
203         error = vfs_fstatat(dfd, filename, &stat, flag);
204         if (error)
205                 return error;
206         return cp_compat_stat64(&stat, statbuf);
207 }
208
209 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
210 {
211         return sys_sysfs(option, arg1, arg2);
212 }
213
214 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
215                         struct compat_old_sigaction __user *,act,
216                         struct compat_old_sigaction __user *,oact)
217 {
218         WARN_ON_ONCE(sig >= 0);
219         return compat_sys_sigaction(-sig, act, oact);
220 }
221
222 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
223                         struct compat_sigaction __user *,act,
224                         struct compat_sigaction __user *,oact,
225                         void __user *,restorer,
226                         compat_size_t,sigsetsize)
227 {
228         struct k_sigaction new_ka, old_ka;
229         int ret;
230         compat_sigset_t set32;
231
232         /* XXX: Don't preclude handling different sized sigset_t's.  */
233         if (sigsetsize != sizeof(compat_sigset_t))
234                 return -EINVAL;
235
236         if (act) {
237                 u32 u_handler, u_restorer;
238
239                 new_ka.ka_restorer = restorer;
240                 ret = get_user(u_handler, &act->sa_handler);
241                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
242                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
243                 sigset_from_compat(&new_ka.sa.sa_mask, &set32);
244                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
245                 ret |= __get_user(u_restorer, &act->sa_restorer);
246                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
247                 if (ret)
248                         return -EFAULT;
249         }
250
251         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
252
253         if (!ret && oact) {
254                 sigset_to_compat(&set32, &old_ka.sa.sa_mask);
255                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
256                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
257                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
258                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
259                 if (ret)
260                         ret = -EFAULT;
261         }
262
263         return ret;
264 }
265
266 #ifdef CONFIG_MODULES
267
268 asmlinkage long sys32_init_module(void __user *umod, u32 len,
269                                   const char __user *uargs)
270 {
271         return sys_init_module(umod, len, uargs);
272 }
273
274 asmlinkage long sys32_delete_module(const char __user *name_user,
275                                     unsigned int flags)
276 {
277         return sys_delete_module(name_user, flags);
278 }
279
280 #else /* CONFIG_MODULES */
281
282 asmlinkage long sys32_init_module(const char __user *name_user,
283                                   struct module __user *mod_user)
284 {
285         return -ENOSYS;
286 }
287
288 asmlinkage long sys32_delete_module(const char __user *name_user)
289 {
290         return -ENOSYS;
291 }
292
293 #endif  /* CONFIG_MODULES */
294
295 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
296                                         char __user *ubuf,
297                                         compat_size_t count,
298                                         unsigned long poshi,
299                                         unsigned long poslo)
300 {
301         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
302 }
303
304 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
305                                          char __user *ubuf,
306                                          compat_size_t count,
307                                          unsigned long poshi,
308                                          unsigned long poslo)
309 {
310         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
311 }
312
313 asmlinkage long compat_sys_readahead(int fd,
314                                      unsigned long offhi,
315                                      unsigned long offlo,
316                                      compat_size_t count)
317 {
318         return sys_readahead(fd, (offhi << 32) | offlo, count);
319 }
320
321 long compat_sys_fadvise64(int fd,
322                           unsigned long offhi,
323                           unsigned long offlo,
324                           compat_size_t len, int advice)
325 {
326         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
327 }
328
329 long compat_sys_fadvise64_64(int fd,
330                              unsigned long offhi, unsigned long offlo,
331                              unsigned long lenhi, unsigned long lenlo,
332                              int advice)
333 {
334         return sys_fadvise64_64(fd,
335                                 (offhi << 32) | offlo,
336                                 (lenhi << 32) | lenlo,
337                                 advice);
338 }
339
340 /* This is just a version for 32-bit applications which does
341  * not force O_LARGEFILE on.
342  */
343
344 asmlinkage long sparc32_open(const char __user *filename,
345                              int flags, int mode)
346 {
347         return do_sys_open(AT_FDCWD, filename, flags, mode);
348 }
349
350 long sys32_lookup_dcookie(unsigned long cookie_high,
351                           unsigned long cookie_low,
352                           char __user *buf, size_t len)
353 {
354         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
355                                   buf, len);
356 }
357
358 long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
359 {
360         return sys_sync_file_range(fd,
361                                    (off_high << 32) | off_low,
362                                    (nb_high << 32) | nb_low,
363                                    flags);
364 }
365
366 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
367                                      u32 lenhi, u32 lenlo)
368 {
369         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
370                              ((loff_t)lenhi << 32) | lenlo);
371 }