summaryrefslogtreecommitdiffstats
path: root/arch/parisc/kernel/sys_parisc32.c
blob: 71efd6a28e2a39b60a3151836d50facd9594984f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
/*
 * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 2000-2001 Hewlett Packard Company
 * Copyright (C) 2000 John Marvin
 * Copyright (C) 2001 Matthew Wilcox
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment. Based heavily on sys_ia32.c and sys_sparc32.c.
 */

#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h> 
#include <linux/mm.h> 
#include <linux/file.h> 
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/time.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/ncp_fs.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/binfmts.h>
#include <linux/namei.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/swap.h>
#include <linux/syscalls.h>

#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>

#include "sys32.h"

#undef DEBUG

#ifdef DEBUG
#define DBG(x)	printk x
#else
#define DBG(x)
#endif

/*
 * sys32_execve() executes a new program.
 */

asmlinkage int sys32_execve(struct pt_regs *regs)
{
	int error;
	char *filename;

	DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
	filename = getname((const char __user *) regs->gr[26]);
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;
	error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
				 compat_ptr(regs->gr[24]), regs);
	if (error == 0) {
		task_lock(current);
		current->ptrace &= ~PT_DTRACE;
		task_unlock(current);
	}
	putname(filename);
out:

	return error;
}

asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
	int r22, int r21, int r20)
{
    printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", 
    	current->comm, current->pid, r20);
    return -ENOSYS;
}

#ifdef CONFIG_SYSCTL

struct __sysctl_args32 {
	u32 name;
	int nlen;
	u32 oldval;
	u32 oldlenp;
	u32 newval;
	u32 newlen;
	u32 __unused[4];
};

asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
{
#ifndef CONFIG_SYSCTL_SYSCALL
	return -ENOSYS;
#else
	struct __sysctl_args32 tmp;
	int error;
	unsigned int oldlen32;
	size_t oldlen, __user *oldlenp = NULL;
	unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;

	DBG(("sysctl32(%p)\n", args));

	if (copy_from_user(&tmp, args, sizeof(tmp)))
		return -EFAULT;

	if (tmp.oldval && tmp.oldlenp) {
		/* Duh, this is ugly and might not work if sysctl_args
		   is in read-only memory, but do_sysctl does indirectly
		   a lot of uaccess in both directions and we'd have to
		   basically copy the whole sysctl.c here, and
		   glibc's __sysctl uses rw memory for the structure
		   anyway.  */
		/* a possibly better hack than this, which will avoid the
		 * problem if the struct is read only, is to push the
		 * 'oldlen' value out to the user's stack instead. -PB
		 */
		if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
			return -EFAULT;
		oldlen = oldlen32;
		if (put_user(oldlen, (size_t *)addr))
			return -EFAULT;
		oldlenp = (size_t *)addr;
	}

	lock_kernel();
	error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen,
			  (void __user *)(u64)tmp.oldval, oldlenp,
			  (void __user *)(u64)tmp.newval, tmp.newlen);
	unlock_kernel();
	if (oldlenp) {
		if (!error) {
			if (get_user(oldlen, (size_t *)addr)) {
				error = -EFAULT;
			} else {
				oldlen32 = oldlen;
				if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
					error = -EFAULT;
			}
		}
		if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
			error = -EFAULT;
	}
	return error;
#endif
}

#endif /* CONFIG_SYSCTL */

asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
	struct compat_timespec __user *interval)
{
	struct timespec t;
	int ret;

	KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
	if (put_compat_timespec(&t, interval))
		return -EFAULT;
	return ret;
}

static int
put_compat_timeval(struct compat_timeval __user *u, struct timeval *t)
{
	struct compat_timeval t32;
	t32.tv_sec = t->tv_sec;
	t32.tv_usec = t->tv_usec;
	return copy_to_user(u, &t32, sizeof t32);
}

static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
{
	long usec;

	if (__get_user(o->tv_sec, &i->tv_sec))
		return -EFAULT;
	if (__get_user(usec, &i->tv_usec))
		return -EFAULT;
	o->tv_nsec = usec * 1000;
	return 0;
}

asmlinkage int
sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
    extern void do_gettimeofday(struct timeval *tv);

    if (tv) {
	    struct timeval ktv;
	    do_gettimeofday(&ktv);
	    if (put_compat_timeval(tv, &ktv))
		    return -EFAULT;
    }
    if (tz) {
	    extern struct timezone sys_tz;
	    if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
		    return -EFAULT;
    }
    return 0;
}

asmlinkage 
int sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
	struct timespec kts;
	struct timezone ktz;

 	if (tv) {
		if (get_ts32(&kts, tv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_from_user(&ktz, tz, sizeof(ktz)))
			return -EFAULT;
	}

	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}

int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
{
	compat_ino_t ino;
	int err;

	if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
	    !new_valid_dev(stat->rdev))
		return -EOVERFLOW;

	ino = stat->ino;
	if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
		return -EOVERFLOW;

	err  = put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
	err |= put_user(ino, &statbuf->st_ino);
	err |= put_user(stat->mode, &statbuf->st_mode);
	err |= put_user(stat->nlink, &statbuf->st_nlink);
	err |= put_user(0, &statbuf->st_reserved1);
	err |= put_user(0, &statbuf->st_reserved2);
	err |= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
	err |= put_user(stat->size, &statbuf->st_size);
	err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	err |= put_user(stat->blksize, &statbuf->st_blksize);
	err |= put_user(stat->blocks, &statbuf->st_blocks);
	err |= put_user(0, &statbuf->__unused1);
	err |= put_user(0, &statbuf->__unused2);
	err |= put_user(0, &statbuf->__unused3);
	err |= put_user(0, &statbuf->__unused4);
	err |= put_user(0, &statbuf->__unused5);
	err |= put_user(0, &statbuf->st_fstype); /* not avail */
	err |= put_user(0, &statbuf->st_realdev); /* not avail */
	err |= put_user(0, &statbuf->st_basemode); /* not avail */
	err |= put_user(0, &statbuf->st_spareshort);
	err |= put_user(stat->uid, &statbuf->st_uid);
	err |= put_user(stat->gid, &statbuf->st_gid);
	err |= put_user(0, &statbuf->st_spare4[0]);
	err |= put_user(0, &statbuf->st_spare4[1]);
	err |= put_user(0, &statbuf->st_spare4[2]);

	return err;
}

/*** copied from mips64 ***/
/*
 * Ooo, nasty.  We need here to frob 32-bit unsigned longs to
 * 64-bit unsigned longs.
 */

static inline int
get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
	n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
	if (ufdset) {
		unsigned long odd;

		if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32)))
			return -EFAULT;

		odd = n & 1UL;
		n &= ~1UL;
		while (n) {
			unsigned long h, l;
			__get_user(l, ufdset);
			__get_user(h, ufdset+1);
			ufdset += 2;
			*fdset++ = h << 32 | l;
			n -= 2;
		}
		if (odd)
			__get_user(*fdset, ufdset);
	} else {
		/* Tricky, must clear full unsigned long in the
		 * kernel fdset at the end, this makes sure that
		 * actually happens.
		 */
		memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
	}
	return 0;
}

static inline void
set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
	unsigned long odd;
	n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));

	if (!ufdset)
		return;

	odd = n & 1UL;
	n &= ~1UL;
	while (n) {
		unsigned long h, l;
		l = *fdset++;
		h = l >> 32;
		__put_user(l, ufdset);
		__put_user(h, ufdset+1);
		ufdset += 2;
		n -= 2;
	}
	if (odd)
		__put_user(*fdset, ufdset);
}

struct msgbuf32 {
    int mtype;
    char mtext[1];
};

asmlinkage long sys32_msgsnd(int msqid,
				struct msgbuf32 __user *umsgp32,
				size_t msgsz, int msgflg)
{
	struct msgbuf *mb;
	struct msgbuf32 mb32;
	int err;

	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
		return -ENOMEM;

	err = get_user(mb32.mtype, &umsgp32->mtype);
	mb->mtype = mb32.mtype;
	err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);

	if (err)
		err = -EFAULT;
	else
		KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);

	kfree(mb);
	return err;
}

asmlinkage long sys32_msgrcv(int msqid,
				struct msgbuf32 __user *umsgp32,
				size_t msgsz, long msgtyp, int msgflg)
{
	struct msgbuf *mb;
	struct msgbuf32 mb32;
	int err, len;

	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
		return -ENOMEM;

	KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);

	if (err >= 0) {
		len = err;
		mb32.mtype = mb->mtype;
		err = put_user(mb32.mtype, &umsgp32->mtype);
		err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
		if (err)
			err = -EFAULT;
		else
			err = len;
	}

	kfree(mb);
	return err;
}

asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
{
        mm_segment_t old_fs = get_fs();
        int ret;
        off_t of;

        if (offset && get_user(of, offset))
                return -EFAULT;

        set_fs(KERNEL_DS);
        ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
        set_fs(old_fs);

        if (offset && put_user(of, offset))
                return -EFAULT;

        return ret;
}

asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
{
	mm_segment_t old_fs = get_fs();
	int ret;
	loff_t lof;
	
	if (offset && get_user(lof, offset))
		return -EFAULT;
		
	set_fs(KERNEL_DS);
	ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
	set_fs(old_fs);
	
	if (offset && put_user(lof, offset))
		return -EFAULT;
		
	return ret;
}


/* lseek() needs a wrapper because 'offset' can be negative, but the top
 * half of the argument has been zeroed by syscall.S.
 */

asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
{
	return sys_lseek(fd, offset, origin);
}

asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
{
        union semun u;
	
        if (cmd == SETVAL) {
                /* Ugh.  arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
                 * The int should be in the first 4, but our argument
                 * frobbing has left it in the last 4.
                 */
                u.val = *((int *)&arg + 1);
                return sys_semctl (semid, semnum, cmd, u);
	}
	return sys_semctl (semid, semnum, cmd, arg);
}

long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
			  size_t len)
{
	return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
				  buf, len);
}

asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
				u32 lenhi, u32 lenlo)
{
        return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
                             ((loff_t)lenhi << 32) | lenlo);
}
OpenPOWER on IntegriCloud