2 * 32 bit compatibility code for System V IPC
4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 2000 VA Linux Co
8 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
11 * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com)
12 * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port)
13 * Copyright (C) 2000 Silicon Graphics, Inc.
14 * Copyright (C) 2001 IBM
15 * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation
16 * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de)
18 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
19 * ppc64 and x86_64, all of which are based on the original sparc64 version
23 #include <linux/compat.h>
24 #include <linux/errno.h>
25 #include <linux/highuid.h>
26 #include <linux/init.h>
27 #include <linux/msg.h>
28 #include <linux/shm.h>
29 #include <linux/syscalls.h>
30 #include <linux/ptrace.h>
32 #include <linux/mutex.h>
33 #include <asm/uaccess.h>
37 struct compat_msgbuf {
42 struct compat_ipc_perm {
52 struct compat_semid_ds {
53 struct compat_ipc_perm sem_perm;
54 compat_time_t sem_otime;
55 compat_time_t sem_ctime;
56 compat_uptr_t sem_base;
57 compat_uptr_t sem_pending;
58 compat_uptr_t sem_pending_last;
60 unsigned short sem_nsems;
63 struct compat_msqid_ds {
64 struct compat_ipc_perm msg_perm;
65 compat_uptr_t msg_first;
66 compat_uptr_t msg_last;
67 compat_time_t msg_stime;
68 compat_time_t msg_rtime;
69 compat_time_t msg_ctime;
70 compat_ulong_t msg_lcbytes;
71 compat_ulong_t msg_lqbytes;
72 unsigned short msg_cbytes;
73 unsigned short msg_qnum;
74 unsigned short msg_qbytes;
75 compat_ipc_pid_t msg_lspid;
76 compat_ipc_pid_t msg_lrpid;
79 struct compat_shmid_ds {
80 struct compat_ipc_perm shm_perm;
82 compat_time_t shm_atime;
83 compat_time_t shm_dtime;
84 compat_time_t shm_ctime;
85 compat_ipc_pid_t shm_cpid;
86 compat_ipc_pid_t shm_lpid;
87 unsigned short shm_nattch;
88 unsigned short shm_unused;
89 compat_uptr_t shm_unused2;
90 compat_uptr_t shm_unused3;
93 struct compat_ipc_kludge {
98 struct compat_shminfo64 {
99 compat_ulong_t shmmax;
100 compat_ulong_t shmmin;
101 compat_ulong_t shmmni;
102 compat_ulong_t shmseg;
103 compat_ulong_t shmall;
104 compat_ulong_t __unused1;
105 compat_ulong_t __unused2;
106 compat_ulong_t __unused3;
107 compat_ulong_t __unused4;
110 struct compat_shm_info {
111 compat_int_t used_ids;
112 compat_ulong_t shm_tot, shm_rss, shm_swp;
113 compat_ulong_t swap_attempts, swap_successes;
116 extern int sem_ctls[];
117 #define sc_semopm (sem_ctls[2])
119 static inline int compat_ipc_parse_version(int *cmd)
121 #ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
122 int version = *cmd & IPC_64;
124 /* this is tricky: architectures that have support for the old
125 * ipc structures in 64 bit binaries need to have IPC_64 set
126 * in cmd, the others need to have it cleared */
127 #ifndef ipc_parse_version
134 /* With the asm-generic APIs, we always use the 64-bit versions. */
139 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
140 struct compat_ipc64_perm __user *up64)
144 err = __get_user(p64->uid, &up64->uid);
145 err |= __get_user(p64->gid, &up64->gid);
146 err |= __get_user(p64->mode, &up64->mode);
150 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
151 struct compat_ipc_perm __user *up)
155 err = __get_user(p->uid, &up->uid);
156 err |= __get_user(p->gid, &up->gid);
157 err |= __get_user(p->mode, &up->mode);
161 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
162 struct compat_ipc64_perm __user *up64)
166 err = __put_user(p64->key, &up64->key);
167 err |= __put_user(p64->uid, &up64->uid);
168 err |= __put_user(p64->gid, &up64->gid);
169 err |= __put_user(p64->cuid, &up64->cuid);
170 err |= __put_user(p64->cgid, &up64->cgid);
171 err |= __put_user(p64->mode, &up64->mode);
172 err |= __put_user(p64->seq, &up64->seq);
176 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
177 struct compat_ipc_perm __user *up)
183 err = __put_user(p->key, &up->key);
185 err |= __put_user(u, &up->uid);
187 err |= __put_user(g, &up->gid);
189 err |= __put_user(u, &up->cuid);
191 err |= __put_user(g, &up->cgid);
192 err |= __put_user(p->mode, &up->mode);
193 err |= __put_user(p->seq, &up->seq);
197 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
198 struct compat_semid64_ds __user *up64)
200 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
202 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
205 static inline int get_compat_semid_ds(struct semid64_ds *s,
206 struct compat_semid_ds __user *up)
208 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
210 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
213 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
214 struct compat_semid64_ds __user *up64)
218 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
220 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
221 err |= __put_user(s64->sem_otime, &up64->sem_otime);
222 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
223 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
227 static inline int put_compat_semid_ds(struct semid64_ds *s,
228 struct compat_semid_ds __user *up)
232 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
234 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
235 err |= __put_user(s->sem_otime, &up->sem_otime);
236 err |= __put_user(s->sem_ctime, &up->sem_ctime);
237 err |= __put_user(s->sem_nsems, &up->sem_nsems);
241 static long do_compat_semctl(int first, int second, int third, u32 pad)
245 struct semid64_ds s64;
246 struct semid64_ds __user *up64;
247 int version = compat_ipc_parse_version(&third);
249 memset(&s64, 0, sizeof(s64));
251 if ((third & (~IPC_64)) == SETVAL)
252 fourth.val = (int) pad;
254 fourth.__pad = compat_ptr(pad);
255 switch (third & (~IPC_64)) {
266 err = sys_semctl(first, second, third, fourth);
271 up64 = compat_alloc_user_space(sizeof(s64));
273 err = sys_semctl(first, second, third, fourth);
276 if (copy_from_user(&s64, up64, sizeof(s64)))
278 else if (version == IPC_64)
279 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
281 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
287 if (version == IPC_64) {
288 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
290 err = get_compat_semid_ds(&s64, compat_ptr(pad));
292 up64 = compat_alloc_user_space(sizeof(s64));
293 if (copy_to_user(up64, &s64, sizeof(s64)))
299 err = sys_semctl(first, second, third, fourth);
309 long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
311 struct compat_msgbuf __user *msgp = dest;
314 if (put_user(msg->m_type, &msgp->mtype))
317 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
318 if (store_msg(msgp->mtext, msg, msgsz))
323 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
324 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
330 if (get_user(pad, (u32 __user *) uptr))
332 return do_compat_semctl(first, second, third, pad);
335 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
337 struct compat_msgbuf __user *up = uptr;
345 if (get_user(type, &up->mtype))
348 return do_msgsnd(first, type, up->mtext, second, third);
351 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
352 int version, void __user *uptr)
360 struct compat_ipc_kludge ipck;
363 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
365 uptr = compat_ptr(ipck.msgp);
366 msgtyp = ipck.msgtyp;
368 return do_msgrcv(first, uptr, second, msgtyp, third, compat_do_msg_fill);
371 long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
373 return do_compat_semctl(semid, semnum, cmd, arg);
376 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
377 compat_ssize_t msgsz, int msgflg)
381 if (get_user(mtype, &msgp->mtype))
383 return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg);
386 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
387 compat_ssize_t msgsz, long msgtyp, int msgflg)
389 return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg,
394 static inline int get_compat_msqid64(struct msqid64_ds *m64,
395 struct compat_msqid64_ds __user *up64)
399 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
401 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
402 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
406 static inline int get_compat_msqid(struct msqid64_ds *m,
407 struct compat_msqid_ds __user *up)
411 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
413 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
414 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
418 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
419 struct compat_msqid64_ds __user *up64)
423 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
425 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
426 err |= __put_user(m64->msg_stime, &up64->msg_stime);
427 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
428 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
429 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
430 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
431 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
432 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
433 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
437 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
438 struct compat_msqid_ds __user *up)
442 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
444 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
445 err |= __put_user(m->msg_stime, &up->msg_stime);
446 err |= __put_user(m->msg_rtime, &up->msg_rtime);
447 err |= __put_user(m->msg_ctime, &up->msg_ctime);
448 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
449 err |= __put_user(m->msg_qnum, &up->msg_qnum);
450 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
451 err |= __put_user(m->msg_lspid, &up->msg_lspid);
452 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
456 long compat_sys_msgctl(int first, int second, void __user *uptr)
459 struct msqid64_ds m64;
460 int version = compat_ipc_parse_version(&second);
463 memset(&m64, 0, sizeof(m64));
465 switch (second & (~IPC_64)) {
469 err = sys_msgctl(first, second, uptr);
473 if (version == IPC_64) {
474 err = get_compat_msqid64(&m64, uptr);
476 err = get_compat_msqid(&m64, uptr);
480 p = compat_alloc_user_space(sizeof(m64));
481 if (copy_to_user(p, &m64, sizeof(m64)))
484 err = sys_msgctl(first, second, p);
489 p = compat_alloc_user_space(sizeof(m64));
490 err = sys_msgctl(first, second, p);
493 if (copy_from_user(&m64, p, sizeof(m64)))
495 else if (version == IPC_64)
496 err2 = put_compat_msqid64_ds(&m64, uptr);
498 err2 = put_compat_msqid_ds(&m64, uptr);
510 #ifndef COMPAT_SHMLBA
511 #define COMPAT_SHMLBA SHMLBA
514 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
515 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
520 compat_ulong_t __user *uaddr;
524 err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA);
527 uaddr = compat_ptr(third);
528 return put_user(raddr, uaddr);
531 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
536 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
539 force_successful_syscall_return();
544 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
545 struct compat_shmid64_ds __user *up64)
547 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
549 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
552 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
553 struct compat_shmid_ds __user *up)
555 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
557 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
560 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
561 struct compat_shmid64_ds __user *up64)
565 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
567 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
568 err |= __put_user(s64->shm_atime, &up64->shm_atime);
569 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
570 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
571 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
572 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
573 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
574 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
578 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
579 struct compat_shmid_ds __user *up)
583 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
585 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
586 err |= __put_user(s->shm_atime, &up->shm_atime);
587 err |= __put_user(s->shm_dtime, &up->shm_dtime);
588 err |= __put_user(s->shm_ctime, &up->shm_ctime);
589 err |= __put_user(s->shm_segsz, &up->shm_segsz);
590 err |= __put_user(s->shm_nattch, &up->shm_nattch);
591 err |= __put_user(s->shm_cpid, &up->shm_cpid);
592 err |= __put_user(s->shm_lpid, &up->shm_lpid);
596 static inline int put_compat_shminfo64(struct shminfo64 *smi,
597 struct compat_shminfo64 __user *up64)
601 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
603 if (smi->shmmax > INT_MAX)
604 smi->shmmax = INT_MAX;
605 err = __put_user(smi->shmmax, &up64->shmmax);
606 err |= __put_user(smi->shmmin, &up64->shmmin);
607 err |= __put_user(smi->shmmni, &up64->shmmni);
608 err |= __put_user(smi->shmseg, &up64->shmseg);
609 err |= __put_user(smi->shmall, &up64->shmall);
613 static inline int put_compat_shminfo(struct shminfo64 *smi,
614 struct shminfo __user *up)
618 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
620 if (smi->shmmax > INT_MAX)
621 smi->shmmax = INT_MAX;
622 err = __put_user(smi->shmmax, &up->shmmax);
623 err |= __put_user(smi->shmmin, &up->shmmin);
624 err |= __put_user(smi->shmmni, &up->shmmni);
625 err |= __put_user(smi->shmseg, &up->shmseg);
626 err |= __put_user(smi->shmall, &up->shmall);
630 static inline int put_compat_shm_info(struct shm_info __user *ip,
631 struct compat_shm_info __user *uip)
636 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
637 copy_from_user(&si, ip, sizeof(si)))
639 err = __put_user(si.used_ids, &uip->used_ids);
640 err |= __put_user(si.shm_tot, &uip->shm_tot);
641 err |= __put_user(si.shm_rss, &uip->shm_rss);
642 err |= __put_user(si.shm_swp, &uip->shm_swp);
643 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
644 err |= __put_user(si.swap_successes, &uip->swap_successes);
648 long compat_sys_shmctl(int first, int second, void __user *uptr)
651 struct shmid64_ds s64;
652 struct shminfo64 smi;
654 int version = compat_ipc_parse_version(&second);
656 memset(&s64, 0, sizeof(s64));
658 switch (second & (~IPC_64)) {
662 err = sys_shmctl(first, second, uptr);
666 p = compat_alloc_user_space(sizeof(smi));
667 err = sys_shmctl(first, second, p);
670 if (copy_from_user(&smi, p, sizeof(smi)))
672 else if (version == IPC_64)
673 err2 = put_compat_shminfo64(&smi, uptr);
675 err2 = put_compat_shminfo(&smi, uptr);
682 if (version == IPC_64) {
683 err = get_compat_shmid64_ds(&s64, uptr);
685 err = get_compat_shmid_ds(&s64, uptr);
689 p = compat_alloc_user_space(sizeof(s64));
690 if (copy_to_user(p, &s64, sizeof(s64)))
693 err = sys_shmctl(first, second, p);
698 p = compat_alloc_user_space(sizeof(s64));
699 err = sys_shmctl(first, second, p);
702 if (copy_from_user(&s64, p, sizeof(s64)))
704 else if (version == IPC_64)
705 err2 = put_compat_shmid64_ds(&s64, uptr);
707 err2 = put_compat_shmid_ds(&s64, uptr);
713 p = compat_alloc_user_space(sizeof(struct shm_info));
714 err = sys_shmctl(first, second, p);
717 err2 = put_compat_shm_info(p, uptr);
729 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
730 unsigned nsops, const struct compat_timespec __user *timeout)
732 struct timespec __user *ts64 = NULL;
735 ts64 = compat_alloc_user_space(sizeof(*ts64));
736 if (get_compat_timespec(&ts, timeout))
738 if (copy_to_user(ts64, &ts, sizeof(ts)))
741 return sys_semtimedop(semid, tsems, nsops, ts64);