Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on | |
c202f298 | 3 | * sys_sparc32 |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2000 VA Linux Co | |
6 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> | |
c202f298 TG |
7 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> |
8 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
9 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
1da177e4 LT |
10 | * Copyright (C) 2000 Hewlett-Packard Co. |
11 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> | |
c202f298 | 12 | * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port) |
1da177e4 LT |
13 | * |
14 | * These routines maintain argument size conversion between 32bit and 64bit | |
c202f298 | 15 | * environment. In 2.5 most of this should be moved to a generic directory. |
1da177e4 LT |
16 | * |
17 | * This file assumes that there is a hole at the end of user address space. | |
c202f298 TG |
18 | * |
19 | * Some of the functions are LE specific currently. These are | |
20 | * hopefully all marked. This should be fixed. | |
1da177e4 LT |
21 | */ |
22 | ||
1da177e4 LT |
23 | #include <linux/kernel.h> |
24 | #include <linux/sched.h> | |
c202f298 TG |
25 | #include <linux/fs.h> |
26 | #include <linux/file.h> | |
1da177e4 LT |
27 | #include <linux/signal.h> |
28 | #include <linux/syscalls.h> | |
1da177e4 LT |
29 | #include <linux/times.h> |
30 | #include <linux/utsname.h> | |
1da177e4 | 31 | #include <linux/smp_lock.h> |
1da177e4 | 32 | #include <linux/mm.h> |
1da177e4 | 33 | #include <linux/uio.h> |
1da177e4 LT |
34 | #include <linux/poll.h> |
35 | #include <linux/personality.h> | |
36 | #include <linux/stat.h> | |
1da177e4 | 37 | #include <linux/rwsem.h> |
1da177e4 LT |
38 | #include <linux/compat.h> |
39 | #include <linux/vfs.h> | |
40 | #include <linux/ptrace.h> | |
41 | #include <linux/highuid.h> | |
ddb15ec1 | 42 | #include <linux/sysctl.h> |
1da177e4 LT |
43 | #include <asm/mman.h> |
44 | #include <asm/types.h> | |
45 | #include <asm/uaccess.h> | |
1da177e4 | 46 | #include <asm/atomic.h> |
28d23128 | 47 | #include <asm/vgtod.h> |
2f06de06 | 48 | #include <asm/sys_ia32.h> |
1da177e4 LT |
49 | |
50 | #define AA(__x) ((unsigned long)(__x)) | |
51 | ||
1da177e4 | 52 | |
c202f298 TG |
53 | asmlinkage long sys32_truncate64(char __user *filename, |
54 | unsigned long offset_low, | |
55 | unsigned long offset_high) | |
1da177e4 LT |
56 | { |
57 | return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low); | |
58 | } | |
59 | ||
c202f298 TG |
60 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low, |
61 | unsigned long offset_high) | |
1da177e4 LT |
62 | { |
63 | return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low); | |
64 | } | |
65 | ||
c202f298 TG |
66 | /* |
67 | * Another set for IA32/LFS -- x86_64 struct stat is different due to | |
68 | * support for 64bit inode numbers. | |
69 | */ | |
70 | static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat) | |
1da177e4 LT |
71 | { |
72 | typeof(ubuf->st_uid) uid = 0; | |
73 | typeof(ubuf->st_gid) gid = 0; | |
74 | SET_UID(uid, stat->uid); | |
75 | SET_GID(gid, stat->gid); | |
76 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) || | |
77 | __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) || | |
c202f298 TG |
78 | __put_user(stat->ino, &ubuf->__st_ino) || |
79 | __put_user(stat->ino, &ubuf->st_ino) || | |
80 | __put_user(stat->mode, &ubuf->st_mode) || | |
81 | __put_user(stat->nlink, &ubuf->st_nlink) || | |
82 | __put_user(uid, &ubuf->st_uid) || | |
83 | __put_user(gid, &ubuf->st_gid) || | |
84 | __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) || | |
85 | __put_user(stat->size, &ubuf->st_size) || | |
86 | __put_user(stat->atime.tv_sec, &ubuf->st_atime) || | |
87 | __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) || | |
88 | __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) || | |
89 | __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) || | |
90 | __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) || | |
91 | __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) || | |
92 | __put_user(stat->blksize, &ubuf->st_blksize) || | |
93 | __put_user(stat->blocks, &ubuf->st_blocks)) | |
1da177e4 LT |
94 | return -EFAULT; |
95 | return 0; | |
96 | } | |
97 | ||
c202f298 TG |
98 | asmlinkage long sys32_stat64(char __user *filename, |
99 | struct stat64 __user *statbuf) | |
1da177e4 LT |
100 | { |
101 | struct kstat stat; | |
102 | int ret = vfs_stat(filename, &stat); | |
c202f298 | 103 | |
1da177e4 LT |
104 | if (!ret) |
105 | ret = cp_stat64(statbuf, &stat); | |
106 | return ret; | |
107 | } | |
108 | ||
c202f298 TG |
109 | asmlinkage long sys32_lstat64(char __user *filename, |
110 | struct stat64 __user *statbuf) | |
1da177e4 LT |
111 | { |
112 | struct kstat stat; | |
113 | int ret = vfs_lstat(filename, &stat); | |
114 | if (!ret) | |
115 | ret = cp_stat64(statbuf, &stat); | |
116 | return ret; | |
117 | } | |
118 | ||
c202f298 | 119 | asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf) |
1da177e4 LT |
120 | { |
121 | struct kstat stat; | |
122 | int ret = vfs_fstat(fd, &stat); | |
123 | if (!ret) | |
124 | ret = cp_stat64(statbuf, &stat); | |
125 | return ret; | |
126 | } | |
127 | ||
c202f298 TG |
128 | asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename, |
129 | struct stat64 __user *statbuf, int flag) | |
cff2b760 UD |
130 | { |
131 | struct kstat stat; | |
0112fc22 | 132 | int error; |
cff2b760 | 133 | |
0112fc22 OD |
134 | error = vfs_fstatat(dfd, filename, &stat, flag); |
135 | if (error) | |
136 | return error; | |
137 | return cp_stat64(statbuf, &stat); | |
cff2b760 UD |
138 | } |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Linux/i386 didn't use to be able to handle more than | |
142 | * 4 system call parameters, so these system calls used a memory | |
143 | * block for parameter passing.. | |
144 | */ | |
145 | ||
146 | struct mmap_arg_struct { | |
147 | unsigned int addr; | |
148 | unsigned int len; | |
149 | unsigned int prot; | |
150 | unsigned int flags; | |
151 | unsigned int fd; | |
152 | unsigned int offset; | |
153 | }; | |
154 | ||
c202f298 | 155 | asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg) |
1da177e4 LT |
156 | { |
157 | struct mmap_arg_struct a; | |
158 | struct file *file = NULL; | |
159 | unsigned long retval; | |
160 | struct mm_struct *mm ; | |
161 | ||
162 | if (copy_from_user(&a, arg, sizeof(a))) | |
163 | return -EFAULT; | |
164 | ||
165 | if (a.offset & ~PAGE_MASK) | |
c202f298 | 166 | return -EINVAL; |
1da177e4 LT |
167 | |
168 | if (!(a.flags & MAP_ANONYMOUS)) { | |
169 | file = fget(a.fd); | |
170 | if (!file) | |
171 | return -EBADF; | |
172 | } | |
c202f298 TG |
173 | |
174 | mm = current->mm; | |
175 | down_write(&mm->mmap_sem); | |
176 | retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, | |
177 | a.offset>>PAGE_SHIFT); | |
1da177e4 LT |
178 | if (file) |
179 | fput(file); | |
180 | ||
c202f298 | 181 | up_write(&mm->mmap_sem); |
1da177e4 LT |
182 | |
183 | return retval; | |
184 | } | |
185 | ||
c202f298 TG |
186 | asmlinkage long sys32_mprotect(unsigned long start, size_t len, |
187 | unsigned long prot) | |
1da177e4 | 188 | { |
c202f298 | 189 | return sys_mprotect(start, len, prot); |
1da177e4 LT |
190 | } |
191 | ||
c202f298 | 192 | asmlinkage long sys32_pipe(int __user *fd) |
1da177e4 LT |
193 | { |
194 | int retval; | |
195 | int fds[2]; | |
196 | ||
ed8cae8b | 197 | retval = do_pipe_flags(fds, 0); |
1da177e4 LT |
198 | if (retval) |
199 | goto out; | |
200 | if (copy_to_user(fd, fds, sizeof(fds))) | |
201 | retval = -EFAULT; | |
c202f298 | 202 | out: |
1da177e4 LT |
203 | return retval; |
204 | } | |
205 | ||
c202f298 TG |
206 | asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act, |
207 | struct sigaction32 __user *oact, | |
208 | unsigned int sigsetsize) | |
1da177e4 LT |
209 | { |
210 | struct k_sigaction new_ka, old_ka; | |
211 | int ret; | |
212 | compat_sigset_t set32; | |
213 | ||
214 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
215 | if (sigsetsize != sizeof(compat_sigset_t)) | |
216 | return -EINVAL; | |
217 | ||
218 | if (act) { | |
219 | compat_uptr_t handler, restorer; | |
220 | ||
221 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
222 | __get_user(handler, &act->sa_handler) || | |
223 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || | |
c202f298 TG |
224 | __get_user(restorer, &act->sa_restorer) || |
225 | __copy_from_user(&set32, &act->sa_mask, | |
226 | sizeof(compat_sigset_t))) | |
1da177e4 LT |
227 | return -EFAULT; |
228 | new_ka.sa.sa_handler = compat_ptr(handler); | |
229 | new_ka.sa.sa_restorer = compat_ptr(restorer); | |
c202f298 TG |
230 | |
231 | /* | |
232 | * FIXME: here we rely on _COMPAT_NSIG_WORS to be >= | |
233 | * than _NSIG_WORDS << 1 | |
234 | */ | |
1da177e4 LT |
235 | switch (_NSIG_WORDS) { |
236 | case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | |
237 | | (((long)set32.sig[7]) << 32); | |
238 | case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | |
239 | | (((long)set32.sig[5]) << 32); | |
240 | case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | |
241 | | (((long)set32.sig[3]) << 32); | |
242 | case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | |
243 | | (((long)set32.sig[1]) << 32); | |
244 | } | |
245 | } | |
246 | ||
247 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
248 | ||
249 | if (!ret && oact) { | |
c202f298 TG |
250 | /* |
251 | * FIXME: here we rely on _COMPAT_NSIG_WORS to be >= | |
252 | * than _NSIG_WORDS << 1 | |
253 | */ | |
1da177e4 LT |
254 | switch (_NSIG_WORDS) { |
255 | case 4: | |
256 | set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); | |
257 | set32.sig[6] = old_ka.sa.sa_mask.sig[3]; | |
258 | case 3: | |
259 | set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); | |
260 | set32.sig[4] = old_ka.sa.sa_mask.sig[2]; | |
261 | case 2: | |
262 | set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); | |
263 | set32.sig[2] = old_ka.sa.sa_mask.sig[1]; | |
264 | case 1: | |
265 | set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); | |
266 | set32.sig[0] = old_ka.sa.sa_mask.sig[0]; | |
267 | } | |
268 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
c202f298 TG |
269 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), |
270 | &oact->sa_handler) || | |
271 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), | |
272 | &oact->sa_restorer) || | |
1da177e4 | 273 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || |
c202f298 TG |
274 | __copy_to_user(&oact->sa_mask, &set32, |
275 | sizeof(compat_sigset_t))) | |
1da177e4 LT |
276 | return -EFAULT; |
277 | } | |
278 | ||
279 | return ret; | |
280 | } | |
281 | ||
c202f298 TG |
282 | asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act, |
283 | struct old_sigaction32 __user *oact) | |
1da177e4 | 284 | { |
c202f298 TG |
285 | struct k_sigaction new_ka, old_ka; |
286 | int ret; | |
1da177e4 | 287 | |
c202f298 | 288 | if (act) { |
1da177e4 LT |
289 | compat_old_sigset_t mask; |
290 | compat_uptr_t handler, restorer; | |
291 | ||
292 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
293 | __get_user(handler, &act->sa_handler) || | |
294 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || | |
295 | __get_user(restorer, &act->sa_restorer) || | |
296 | __get_user(mask, &act->sa_mask)) | |
297 | return -EFAULT; | |
298 | ||
299 | new_ka.sa.sa_handler = compat_ptr(handler); | |
300 | new_ka.sa.sa_restorer = compat_ptr(restorer); | |
301 | ||
302 | siginitset(&new_ka.sa.sa_mask, mask); | |
c202f298 | 303 | } |
1da177e4 | 304 | |
c202f298 | 305 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); |
1da177e4 LT |
306 | |
307 | if (!ret && oact) { | |
308 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
c202f298 TG |
309 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), |
310 | &oact->sa_handler) || | |
311 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), | |
312 | &oact->sa_restorer) || | |
1da177e4 LT |
313 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || |
314 | __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) | |
315 | return -EFAULT; | |
c202f298 | 316 | } |
1da177e4 LT |
317 | |
318 | return ret; | |
319 | } | |
320 | ||
c202f298 TG |
321 | asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, |
322 | compat_sigset_t __user *oset, | |
323 | unsigned int sigsetsize) | |
1da177e4 LT |
324 | { |
325 | sigset_t s; | |
326 | compat_sigset_t s32; | |
327 | int ret; | |
328 | mm_segment_t old_fs = get_fs(); | |
c202f298 | 329 | |
1da177e4 | 330 | if (set) { |
c202f298 | 331 | if (copy_from_user(&s32, set, sizeof(compat_sigset_t))) |
1da177e4 LT |
332 | return -EFAULT; |
333 | switch (_NSIG_WORDS) { | |
334 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); | |
335 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); | |
336 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); | |
337 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
338 | } | |
339 | } | |
c202f298 | 340 | set_fs(KERNEL_DS); |
ddb15ec1 AK |
341 | ret = sys_rt_sigprocmask(how, |
342 | set ? (sigset_t __user *)&s : NULL, | |
343 | oset ? (sigset_t __user *)&s : NULL, | |
c202f298 TG |
344 | sigsetsize); |
345 | set_fs(old_fs); | |
346 | if (ret) | |
347 | return ret; | |
1da177e4 LT |
348 | if (oset) { |
349 | switch (_NSIG_WORDS) { | |
350 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
351 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
352 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
353 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
354 | } | |
c202f298 | 355 | if (copy_to_user(oset, &s32, sizeof(compat_sigset_t))) |
1da177e4 LT |
356 | return -EFAULT; |
357 | } | |
358 | return 0; | |
359 | } | |
360 | ||
c202f298 | 361 | asmlinkage long sys32_alarm(unsigned int seconds) |
1da177e4 | 362 | { |
c08b8a49 | 363 | return alarm_setitimer(seconds); |
1da177e4 LT |
364 | } |
365 | ||
1da177e4 LT |
366 | struct sel_arg_struct { |
367 | unsigned int n; | |
368 | unsigned int inp; | |
369 | unsigned int outp; | |
370 | unsigned int exp; | |
371 | unsigned int tvp; | |
372 | }; | |
373 | ||
c202f298 | 374 | asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg) |
1da177e4 LT |
375 | { |
376 | struct sel_arg_struct a; | |
377 | ||
378 | if (copy_from_user(&a, arg, sizeof(a))) | |
379 | return -EFAULT; | |
380 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
381 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
382 | } | |
383 | ||
c202f298 TG |
384 | asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, |
385 | int options) | |
1da177e4 LT |
386 | { |
387 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
388 | } | |
389 | ||
1da177e4 LT |
390 | /* 32-bit timeval and related flotsam. */ |
391 | ||
c202f298 | 392 | asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2) |
1da177e4 LT |
393 | { |
394 | return sys_sysfs(option, arg1, arg2); | |
395 | } | |
396 | ||
c202f298 TG |
397 | asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid, |
398 | struct compat_timespec __user *interval) | |
1da177e4 LT |
399 | { |
400 | struct timespec t; | |
401 | int ret; | |
c202f298 TG |
402 | mm_segment_t old_fs = get_fs(); |
403 | ||
404 | set_fs(KERNEL_DS); | |
ddb15ec1 | 405 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); |
c202f298 | 406 | set_fs(old_fs); |
1da177e4 LT |
407 | if (put_compat_timespec(&t, interval)) |
408 | return -EFAULT; | |
409 | return ret; | |
410 | } | |
411 | ||
c202f298 TG |
412 | asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, |
413 | compat_size_t sigsetsize) | |
1da177e4 LT |
414 | { |
415 | sigset_t s; | |
416 | compat_sigset_t s32; | |
417 | int ret; | |
418 | mm_segment_t old_fs = get_fs(); | |
c202f298 TG |
419 | |
420 | set_fs(KERNEL_DS); | |
ddb15ec1 | 421 | ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize); |
c202f298 | 422 | set_fs(old_fs); |
1da177e4 LT |
423 | if (!ret) { |
424 | switch (_NSIG_WORDS) { | |
425 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
426 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
427 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
428 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
429 | } | |
c202f298 | 430 | if (copy_to_user(set, &s32, sizeof(compat_sigset_t))) |
1da177e4 LT |
431 | return -EFAULT; |
432 | } | |
433 | return ret; | |
434 | } | |
435 | ||
c202f298 TG |
436 | asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig, |
437 | compat_siginfo_t __user *uinfo) | |
1da177e4 LT |
438 | { |
439 | siginfo_t info; | |
440 | int ret; | |
441 | mm_segment_t old_fs = get_fs(); | |
c202f298 | 442 | |
1da177e4 LT |
443 | if (copy_siginfo_from_user32(&info, uinfo)) |
444 | return -EFAULT; | |
c202f298 | 445 | set_fs(KERNEL_DS); |
ddb15ec1 | 446 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info); |
c202f298 | 447 | set_fs(old_fs); |
1da177e4 LT |
448 | return ret; |
449 | } | |
450 | ||
b89a8171 | 451 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
452 | struct sysctl_ia32 { |
453 | unsigned int name; | |
454 | int nlen; | |
455 | unsigned int oldval; | |
456 | unsigned int oldlenp; | |
457 | unsigned int newval; | |
458 | unsigned int newlen; | |
459 | unsigned int __unused[4]; | |
460 | }; | |
461 | ||
462 | ||
c202f298 | 463 | asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32) |
1da177e4 LT |
464 | { |
465 | struct sysctl_ia32 a32; | |
c202f298 | 466 | mm_segment_t old_fs = get_fs(); |
1da177e4 LT |
467 | void __user *oldvalp, *newvalp; |
468 | size_t oldlen; | |
469 | int __user *namep; | |
470 | long ret; | |
1da177e4 | 471 | |
c202f298 | 472 | if (copy_from_user(&a32, args32, sizeof(a32))) |
1da177e4 LT |
473 | return -EFAULT; |
474 | ||
475 | /* | |
c202f298 TG |
476 | * We need to pre-validate these because we have to disable |
477 | * address checking before calling do_sysctl() because of | |
478 | * OLDLEN but we can't run the risk of the user specifying bad | |
479 | * addresses here. Well, since we're dealing with 32 bit | |
480 | * addresses, we KNOW that access_ok() will always succeed, so | |
481 | * this is an expensive NOP, but so what... | |
1da177e4 LT |
482 | */ |
483 | namep = compat_ptr(a32.name); | |
484 | oldvalp = compat_ptr(a32.oldval); | |
485 | newvalp = compat_ptr(a32.newval); | |
486 | ||
487 | if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
488 | || !access_ok(VERIFY_WRITE, namep, 0) | |
489 | || !access_ok(VERIFY_WRITE, oldvalp, 0) | |
490 | || !access_ok(VERIFY_WRITE, newvalp, 0)) | |
491 | return -EFAULT; | |
492 | ||
493 | set_fs(KERNEL_DS); | |
494 | lock_kernel(); | |
ddb15ec1 AK |
495 | ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen, |
496 | newvalp, (size_t) a32.newlen); | |
1da177e4 LT |
497 | unlock_kernel(); |
498 | set_fs(old_fs); | |
499 | ||
c202f298 | 500 | if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp))) |
1da177e4 LT |
501 | return -EFAULT; |
502 | ||
503 | return ret; | |
504 | } | |
505 | #endif | |
506 | ||
c202f298 TG |
507 | /* warning: next two assume little endian */ |
508 | asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count, | |
509 | u32 poslo, u32 poshi) | |
1da177e4 LT |
510 | { |
511 | return sys_pread64(fd, ubuf, count, | |
512 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
513 | } | |
514 | ||
c202f298 TG |
515 | asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, |
516 | u32 poslo, u32 poshi) | |
1da177e4 LT |
517 | { |
518 | return sys_pwrite64(fd, ubuf, count, | |
519 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
520 | } | |
521 | ||
522 | ||
c202f298 | 523 | asmlinkage long sys32_personality(unsigned long personality) |
1da177e4 LT |
524 | { |
525 | int ret; | |
c202f298 TG |
526 | |
527 | if (personality(current->personality) == PER_LINUX32 && | |
1da177e4 LT |
528 | personality == PER_LINUX) |
529 | personality = PER_LINUX32; | |
530 | ret = sys_personality(personality); | |
531 | if (ret == PER_LINUX32) | |
532 | ret = PER_LINUX; | |
533 | return ret; | |
534 | } | |
535 | ||
c202f298 TG |
536 | asmlinkage long sys32_sendfile(int out_fd, int in_fd, |
537 | compat_off_t __user *offset, s32 count) | |
1da177e4 LT |
538 | { |
539 | mm_segment_t old_fs = get_fs(); | |
540 | int ret; | |
541 | off_t of; | |
c202f298 | 542 | |
1da177e4 LT |
543 | if (offset && get_user(of, offset)) |
544 | return -EFAULT; | |
c202f298 | 545 | |
1da177e4 | 546 | set_fs(KERNEL_DS); |
ddb15ec1 AK |
547 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, |
548 | count); | |
1da177e4 | 549 | set_fs(old_fs); |
c202f298 | 550 | |
83b942bd | 551 | if (offset && put_user(of, offset)) |
1da177e4 | 552 | return -EFAULT; |
1da177e4 LT |
553 | return ret; |
554 | } | |
555 | ||
1da177e4 | 556 | asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len, |
c202f298 TG |
557 | unsigned long prot, unsigned long flags, |
558 | unsigned long fd, unsigned long pgoff) | |
1da177e4 LT |
559 | { |
560 | struct mm_struct *mm = current->mm; | |
561 | unsigned long error; | |
c202f298 | 562 | struct file *file = NULL; |
1da177e4 LT |
563 | |
564 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
565 | if (!(flags & MAP_ANONYMOUS)) { | |
566 | file = fget(fd); | |
567 | if (!file) | |
568 | return -EBADF; | |
569 | } | |
570 | ||
571 | down_write(&mm->mmap_sem); | |
572 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
573 | up_write(&mm->mmap_sem); | |
574 | ||
575 | if (file) | |
576 | fput(file); | |
577 | return error; | |
578 | } | |
579 | ||
c202f298 | 580 | asmlinkage long sys32_olduname(struct oldold_utsname __user *name) |
1da177e4 | 581 | { |
c202f298 | 582 | char *arch = "x86_64"; |
26c13f2b | 583 | int err; |
1da177e4 LT |
584 | |
585 | if (!name) | |
586 | return -EFAULT; | |
e9ff3990 | 587 | if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname))) |
1da177e4 | 588 | return -EFAULT; |
c202f298 TG |
589 | |
590 | down_read(&uts_sem); | |
591 | ||
592 | err = __copy_to_user(&name->sysname, &utsname()->sysname, | |
593 | __OLD_UTS_LEN); | |
594 | err |= __put_user(0, name->sysname+__OLD_UTS_LEN); | |
595 | err |= __copy_to_user(&name->nodename, &utsname()->nodename, | |
596 | __OLD_UTS_LEN); | |
597 | err |= __put_user(0, name->nodename+__OLD_UTS_LEN); | |
598 | err |= __copy_to_user(&name->release, &utsname()->release, | |
599 | __OLD_UTS_LEN); | |
600 | err |= __put_user(0, name->release+__OLD_UTS_LEN); | |
601 | err |= __copy_to_user(&name->version, &utsname()->version, | |
602 | __OLD_UTS_LEN); | |
603 | err |= __put_user(0, name->version+__OLD_UTS_LEN); | |
604 | ||
605 | if (personality(current->personality) == PER_LINUX32) | |
606 | arch = "i686"; | |
607 | ||
608 | err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1); | |
e9ff3990 SH |
609 | |
610 | up_read(&uts_sem); | |
611 | ||
612 | err = err ? -EFAULT : 0; | |
613 | ||
614 | return err; | |
1da177e4 LT |
615 | } |
616 | ||
c202f298 | 617 | long sys32_uname(struct old_utsname __user *name) |
1da177e4 LT |
618 | { |
619 | int err; | |
c202f298 | 620 | |
1da177e4 LT |
621 | if (!name) |
622 | return -EFAULT; | |
623 | down_read(&uts_sem); | |
c202f298 | 624 | err = copy_to_user(name, utsname(), sizeof(*name)); |
1da177e4 | 625 | up_read(&uts_sem); |
c202f298 | 626 | if (personality(current->personality) == PER_LINUX32) |
1da177e4 | 627 | err |= copy_to_user(&name->machine, "i686", 5); |
c202f298 TG |
628 | |
629 | return err ? -EFAULT : 0; | |
1da177e4 LT |
630 | } |
631 | ||
1da177e4 LT |
632 | asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv, |
633 | compat_uptr_t __user *envp, struct pt_regs *regs) | |
634 | { | |
635 | long error; | |
c202f298 | 636 | char *filename; |
1da177e4 LT |
637 | |
638 | filename = getname(name); | |
639 | error = PTR_ERR(filename); | |
640 | if (IS_ERR(filename)) | |
641 | return error; | |
642 | error = compat_do_execve(filename, argv, envp, regs); | |
1da177e4 LT |
643 | putname(filename); |
644 | return error; | |
645 | } | |
646 | ||
647 | asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp, | |
648 | struct pt_regs *regs) | |
649 | { | |
65ea5b03 PA |
650 | void __user *parent_tid = (void __user *)regs->dx; |
651 | void __user *child_tid = (void __user *)regs->di; | |
c202f298 | 652 | |
1da177e4 | 653 | if (!newsp) |
65ea5b03 | 654 | newsp = regs->sp; |
c202f298 | 655 | return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid); |
1da177e4 LT |
656 | } |
657 | ||
658 | /* | |
c202f298 TG |
659 | * Some system calls that need sign extended arguments. This could be |
660 | * done by a generic wrapper. | |
661 | */ | |
662 | long sys32_lseek(unsigned int fd, int offset, unsigned int whence) | |
1da177e4 LT |
663 | { |
664 | return sys_lseek(fd, offset, whence); | |
665 | } | |
666 | ||
667 | long sys32_kill(int pid, int sig) | |
668 | { | |
669 | return sys_kill(pid, sig); | |
670 | } | |
c202f298 TG |
671 | |
672 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, | |
1da177e4 | 673 | __u32 len_low, __u32 len_high, int advice) |
c202f298 | 674 | { |
1da177e4 LT |
675 | return sys_fadvise64_64(fd, |
676 | (((u64)offset_high)<<32) | offset_low, | |
677 | (((u64)len_high)<<32) | len_low, | |
c202f298 TG |
678 | advice); |
679 | } | |
1da177e4 LT |
680 | |
681 | long sys32_vm86_warning(void) | |
c202f298 | 682 | { |
1da177e4 LT |
683 | struct task_struct *me = current; |
684 | static char lastcomm[sizeof(me->comm)]; | |
c202f298 | 685 | |
1da177e4 | 686 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { |
c202f298 TG |
687 | compat_printk(KERN_INFO |
688 | "%s: vm86 mode not supported on 64 bit kernel\n", | |
689 | me->comm); | |
1da177e4 | 690 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); |
c202f298 | 691 | } |
1da177e4 | 692 | return -ENOSYS; |
c202f298 | 693 | } |
1da177e4 LT |
694 | |
695 | long sys32_lookup_dcookie(u32 addr_low, u32 addr_high, | |
c202f298 | 696 | char __user *buf, size_t len) |
1da177e4 LT |
697 | { |
698 | return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len); | |
699 | } | |
700 | ||
c202f298 TG |
701 | asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi, |
702 | size_t count) | |
e412ac49 AK |
703 | { |
704 | return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count); | |
705 | } | |
706 | ||
707 | asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi, | |
c202f298 | 708 | unsigned n_low, unsigned n_hi, int flags) |
e412ac49 AK |
709 | { |
710 | return sys_sync_file_range(fd, | |
711 | ((u64)off_hi << 32) | off_low, | |
712 | ((u64)n_hi << 32) | n_low, flags); | |
713 | } | |
714 | ||
c202f298 TG |
715 | asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi, |
716 | size_t len, int advice) | |
e412ac49 AK |
717 | { |
718 | return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo, | |
719 | len, advice); | |
720 | } | |
97ac7350 AA |
721 | |
722 | asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo, | |
723 | unsigned offset_hi, unsigned len_lo, | |
724 | unsigned len_hi) | |
725 | { | |
726 | return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo, | |
727 | ((u64)len_hi << 32) | len_lo); | |
728 | } |