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 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
310 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
316 if (get_user(pad, (u32 __user *) uptr))
318 return do_compat_semctl(first, second, third, pad);
321 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
323 struct compat_msgbuf __user *up = uptr;
331 if (get_user(type, &up->mtype))
334 return do_msgsnd(first, type, up->mtext, second, third);
337 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
338 int version, void __user *uptr)
340 struct compat_msgbuf __user *up;
350 struct compat_ipc_kludge ipck;
355 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
357 uptr = compat_ptr(ipck.msgp);
358 msgtyp = ipck.msgtyp;
361 err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
364 if (put_user(type, &up->mtype))
370 long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
372 return do_compat_semctl(semid, semnum, cmd, arg);
375 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
376 compat_ssize_t msgsz, int msgflg)
380 if (get_user(mtype, &msgp->mtype))
382 return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg);
385 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
386 compat_ssize_t msgsz, long msgtyp, int msgflg)
390 err = do_msgrcv(msqid, &mtype, msgp->mtext, (ssize_t)msgsz, msgtyp, msgflg);
394 if (put_user(mtype, &msgp->mtype))
401 static inline int get_compat_msqid64(struct msqid64_ds *m64,
402 struct compat_msqid64_ds __user *up64)
406 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
408 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
409 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
413 static inline int get_compat_msqid(struct msqid64_ds *m,
414 struct compat_msqid_ds __user *up)
418 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
420 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
421 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
425 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
426 struct compat_msqid64_ds __user *up64)
430 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
432 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
433 err |= __put_user(m64->msg_stime, &up64->msg_stime);
434 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
435 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
436 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
437 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
438 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
439 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
440 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
444 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
445 struct compat_msqid_ds __user *up)
449 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
451 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
452 err |= __put_user(m->msg_stime, &up->msg_stime);
453 err |= __put_user(m->msg_rtime, &up->msg_rtime);
454 err |= __put_user(m->msg_ctime, &up->msg_ctime);
455 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
456 err |= __put_user(m->msg_qnum, &up->msg_qnum);
457 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
458 err |= __put_user(m->msg_lspid, &up->msg_lspid);
459 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
463 long compat_sys_msgctl(int first, int second, void __user *uptr)
466 struct msqid64_ds m64;
467 int version = compat_ipc_parse_version(&second);
470 memset(&m64, 0, sizeof(m64));
472 switch (second & (~IPC_64)) {
476 err = sys_msgctl(first, second, uptr);
480 if (version == IPC_64) {
481 err = get_compat_msqid64(&m64, uptr);
483 err = get_compat_msqid(&m64, uptr);
487 p = compat_alloc_user_space(sizeof(m64));
488 if (copy_to_user(p, &m64, sizeof(m64)))
491 err = sys_msgctl(first, second, p);
496 p = compat_alloc_user_space(sizeof(m64));
497 err = sys_msgctl(first, second, p);
500 if (copy_from_user(&m64, p, sizeof(m64)))
502 else if (version == IPC_64)
503 err2 = put_compat_msqid64_ds(&m64, uptr);
505 err2 = put_compat_msqid_ds(&m64, uptr);
517 #ifndef COMPAT_SHMLBA
518 #define COMPAT_SHMLBA SHMLBA
521 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
522 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
527 compat_ulong_t __user *uaddr;
531 err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA);
534 uaddr = compat_ptr(third);
535 return put_user(raddr, uaddr);
538 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
543 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
546 force_successful_syscall_return();
551 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
552 struct compat_shmid64_ds __user *up64)
554 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
556 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
559 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
560 struct compat_shmid_ds __user *up)
562 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
564 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
567 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
568 struct compat_shmid64_ds __user *up64)
572 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
574 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
575 err |= __put_user(s64->shm_atime, &up64->shm_atime);
576 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
577 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
578 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
579 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
580 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
581 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
585 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
586 struct compat_shmid_ds __user *up)
590 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
592 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
593 err |= __put_user(s->shm_atime, &up->shm_atime);
594 err |= __put_user(s->shm_dtime, &up->shm_dtime);
595 err |= __put_user(s->shm_ctime, &up->shm_ctime);
596 err |= __put_user(s->shm_segsz, &up->shm_segsz);
597 err |= __put_user(s->shm_nattch, &up->shm_nattch);
598 err |= __put_user(s->shm_cpid, &up->shm_cpid);
599 err |= __put_user(s->shm_lpid, &up->shm_lpid);
603 static inline int put_compat_shminfo64(struct shminfo64 *smi,
604 struct compat_shminfo64 __user *up64)
608 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
610 if (smi->shmmax > INT_MAX)
611 smi->shmmax = INT_MAX;
612 err = __put_user(smi->shmmax, &up64->shmmax);
613 err |= __put_user(smi->shmmin, &up64->shmmin);
614 err |= __put_user(smi->shmmni, &up64->shmmni);
615 err |= __put_user(smi->shmseg, &up64->shmseg);
616 err |= __put_user(smi->shmall, &up64->shmall);
620 static inline int put_compat_shminfo(struct shminfo64 *smi,
621 struct shminfo __user *up)
625 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
627 if (smi->shmmax > INT_MAX)
628 smi->shmmax = INT_MAX;
629 err = __put_user(smi->shmmax, &up->shmmax);
630 err |= __put_user(smi->shmmin, &up->shmmin);
631 err |= __put_user(smi->shmmni, &up->shmmni);
632 err |= __put_user(smi->shmseg, &up->shmseg);
633 err |= __put_user(smi->shmall, &up->shmall);
637 static inline int put_compat_shm_info(struct shm_info __user *ip,
638 struct compat_shm_info __user *uip)
643 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
644 copy_from_user(&si, ip, sizeof(si)))
646 err = __put_user(si.used_ids, &uip->used_ids);
647 err |= __put_user(si.shm_tot, &uip->shm_tot);
648 err |= __put_user(si.shm_rss, &uip->shm_rss);
649 err |= __put_user(si.shm_swp, &uip->shm_swp);
650 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
651 err |= __put_user(si.swap_successes, &uip->swap_successes);
655 long compat_sys_shmctl(int first, int second, void __user *uptr)
658 struct shmid64_ds s64;
659 struct shminfo64 smi;
661 int version = compat_ipc_parse_version(&second);
663 memset(&s64, 0, sizeof(s64));
665 switch (second & (~IPC_64)) {
669 err = sys_shmctl(first, second, uptr);
673 p = compat_alloc_user_space(sizeof(smi));
674 err = sys_shmctl(first, second, p);
677 if (copy_from_user(&smi, p, sizeof(smi)))
679 else if (version == IPC_64)
680 err2 = put_compat_shminfo64(&smi, uptr);
682 err2 = put_compat_shminfo(&smi, uptr);
689 if (version == IPC_64) {
690 err = get_compat_shmid64_ds(&s64, uptr);
692 err = get_compat_shmid_ds(&s64, uptr);
696 p = compat_alloc_user_space(sizeof(s64));
697 if (copy_to_user(p, &s64, sizeof(s64)))
700 err = sys_shmctl(first, second, p);
705 p = compat_alloc_user_space(sizeof(s64));
706 err = sys_shmctl(first, second, p);
709 if (copy_from_user(&s64, p, sizeof(s64)))
711 else if (version == IPC_64)
712 err2 = put_compat_shmid64_ds(&s64, uptr);
714 err2 = put_compat_shmid_ds(&s64, uptr);
720 p = compat_alloc_user_space(sizeof(struct shm_info));
721 err = sys_shmctl(first, second, p);
724 err2 = put_compat_shm_info(p, uptr);
736 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
737 unsigned nsops, const struct compat_timespec __user *timeout)
739 struct timespec __user *ts64 = NULL;
742 ts64 = compat_alloc_user_space(sizeof(*ts64));
743 if (get_compat_timespec(&ts, timeout))
745 if (copy_to_user(ts64, &ts, sizeof(ts)))
748 return sys_semtimedop(semid, tsems, nsops, ts64);