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-rw-r--r--ipc/compat.c687
1 files changed, 687 insertions, 0 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
new file mode 100644
index 000000000000..70e4e4e10fd1
--- /dev/null
+++ b/ipc/compat.c
@@ -0,0 +1,687 @@
+/*
+ * 32 bit compatibility code for System V IPC
+ *
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 2000 VA Linux Co
+ * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
+ * Copyright (C) 2000 Hewlett-Packard Co.
+ * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com)
+ * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port)
+ * Copyright (C) 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 IBM
+ * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de)
+ *
+ * This code is collected from the versions for sparc64, mips64, s390x, ia64,
+ * ppc64 and x86_64, all of which are based on the original sparc64 version
+ * by Jakub Jelinek.
+ *
+ */
+#include <linux/compat.h>
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/highuid.h>
+#include <linux/init.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+
+#include "util.h"
+
+struct compat_msgbuf {
+ compat_long_t mtype;
+ char mtext[1];
+};
+
+struct compat_ipc_perm {
+ key_t key;
+ compat_uid_t uid;
+ compat_gid_t gid;
+ compat_uid_t cuid;
+ compat_gid_t cgid;
+ compat_mode_t mode;
+ unsigned short seq;
+};
+
+struct compat_semid_ds {
+ struct compat_ipc_perm sem_perm;
+ compat_time_t sem_otime;
+ compat_time_t sem_ctime;
+ compat_uptr_t sem_base;
+ compat_uptr_t sem_pending;
+ compat_uptr_t sem_pending_last;
+ compat_uptr_t undo;
+ unsigned short sem_nsems;
+};
+
+struct compat_msqid_ds {
+ struct compat_ipc_perm msg_perm;
+ compat_uptr_t msg_first;
+ compat_uptr_t msg_last;
+ compat_time_t msg_stime;
+ compat_time_t msg_rtime;
+ compat_time_t msg_ctime;
+ compat_ulong_t msg_lcbytes;
+ compat_ulong_t msg_lqbytes;
+ unsigned short msg_cbytes;
+ unsigned short msg_qnum;
+ unsigned short msg_qbytes;
+ compat_ipc_pid_t msg_lspid;
+ compat_ipc_pid_t msg_lrpid;
+};
+
+struct compat_shmid_ds {
+ struct compat_ipc_perm shm_perm;
+ int shm_segsz;
+ compat_time_t shm_atime;
+ compat_time_t shm_dtime;
+ compat_time_t shm_ctime;
+ compat_ipc_pid_t shm_cpid;
+ compat_ipc_pid_t shm_lpid;
+ unsigned short shm_nattch;
+ unsigned short shm_unused;
+ compat_uptr_t shm_unused2;
+ compat_uptr_t shm_unused3;
+};
+
+struct compat_ipc_kludge {
+ compat_uptr_t msgp;
+ compat_long_t msgtyp;
+};
+
+struct compat_shminfo64 {
+ compat_ulong_t shmmax;
+ compat_ulong_t shmmin;
+ compat_ulong_t shmmni;
+ compat_ulong_t shmseg;
+ compat_ulong_t shmall;
+ compat_ulong_t __unused1;
+ compat_ulong_t __unused2;
+ compat_ulong_t __unused3;
+ compat_ulong_t __unused4;
+};
+
+struct compat_shm_info {
+ compat_int_t used_ids;
+ compat_ulong_t shm_tot, shm_rss, shm_swp;
+ compat_ulong_t swap_attempts, swap_successes;
+};
+
+extern int sem_ctls[];
+#define sc_semopm (sem_ctls[2])
+#define MAXBUF (64*1024)
+
+static inline int compat_ipc_parse_version(int *cmd)
+{
+ int version = *cmd & IPC_64;
+
+ /* this is tricky: architectures that have support for the old
+ * ipc structures in 64 bit binaries need to have IPC_64 set
+ * in cmd, the others need to have it cleared */
+#ifndef ipc_parse_version
+ *cmd |= IPC_64;
+#else
+ *cmd &= ~IPC_64;
+#endif
+ return version;
+}
+
+static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
+ struct compat_ipc64_perm __user *up64)
+{
+ int err;
+
+ err = __get_user(p64->uid, &up64->uid);
+ err |= __get_user(p64->gid, &up64->gid);
+ err |= __get_user(p64->mode, &up64->mode);
+ return err;
+}
+
+static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
+ struct compat_ipc_perm __user *up)
+{
+ int err;
+
+ err = __get_user(p->uid, &up->uid);
+ err |= __get_user(p->gid, &up->gid);
+ err |= __get_user(p->mode, &up->mode);
+ return err;
+}
+
+static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
+ struct compat_ipc64_perm __user *up64)
+{
+ int err;
+
+ err = __put_user(p64->key, &up64->key);
+ err |= __put_user(p64->uid, &up64->uid);
+ err |= __put_user(p64->gid, &up64->gid);
+ err |= __put_user(p64->cuid, &up64->cuid);
+ err |= __put_user(p64->cgid, &up64->cgid);
+ err |= __put_user(p64->mode, &up64->mode);
+ err |= __put_user(p64->seq, &up64->seq);
+ return err;
+}
+
+static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
+ struct compat_ipc_perm __user *up)
+{
+ int err;
+ compat_uid_t u;
+ compat_gid_t g;
+
+ err = __put_user(p->key, &up->key);
+ SET_UID(u, p->uid);
+ err |= __put_user(u, &up->uid);
+ SET_GID(g, p->gid);
+ err |= __put_user(g, &up->gid);
+ SET_UID(u, p->cuid);
+ err |= __put_user(u, &up->cuid);
+ SET_GID(g, p->cgid);
+ err |= __put_user(g, &up->cgid);
+ err |= __put_user(p->mode, &up->mode);
+ err |= __put_user(p->seq, &up->seq);
+ return err;
+}
+
+static inline int get_compat_semid64_ds(struct semid64_ds *s64,
+ struct compat_semid64_ds __user *up64)
+{
+ if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
+ return -EFAULT;
+ return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
+}
+
+static inline int get_compat_semid_ds(struct semid64_ds *s,
+ struct compat_semid_ds __user *up)
+{
+ if (!access_ok (VERIFY_READ, up, sizeof(*up)))
+ return -EFAULT;
+ return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
+}
+
+static inline int put_compat_semid64_ds(struct semid64_ds *s64,
+ struct compat_semid64_ds __user *up64)
+{
+ int err;
+
+ if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
+ return -EFAULT;
+ err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
+ err |= __put_user(s64->sem_otime, &up64->sem_otime);
+ err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
+ err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
+ return err;
+}
+
+static inline int put_compat_semid_ds(struct semid64_ds *s,
+ struct compat_semid_ds __user *up)
+{
+ int err;
+
+ if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
+ err = -EFAULT;
+ err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
+ err |= __put_user(s->sem_otime, &up->sem_otime);
+ err |= __put_user(s->sem_ctime, &up->sem_ctime);
+ err |= __put_user(s->sem_nsems, &up->sem_nsems);
+ return err;
+}
+
+long compat_sys_semctl(int first, int second, int third, void __user *uptr)
+{
+ union semun fourth;
+ u32 pad;
+ int err, err2;
+ struct semid64_ds s64;
+ struct semid64_ds __user *up64;
+ int version = compat_ipc_parse_version(&third);
+
+ if (!uptr)
+ return -EINVAL;
+ if (get_user(pad, (u32 __user *) uptr))
+ return -EFAULT;
+ if ((third & (~IPC_64)) == SETVAL)
+ fourth.val = (int) pad;
+ else
+ fourth.__pad = compat_ptr(pad);
+ switch (third & (~IPC_64)) {
+ case IPC_INFO:
+ case IPC_RMID:
+ case SEM_INFO:
+ case GETVAL:
+ case GETPID:
+ case GETNCNT:
+ case GETZCNT:
+ case GETALL:
+ case SETVAL:
+ case SETALL:
+ err = sys_semctl(first, second, third, fourth);
+ break;
+
+ case IPC_STAT:
+ case SEM_STAT:
+ up64 = compat_alloc_user_space(sizeof(s64));
+ fourth.__pad = up64;
+ err = sys_semctl(first, second, third, fourth);
+ if (err < 0)
+ break;
+ if (copy_from_user(&s64, up64, sizeof(s64)))
+ err2 = -EFAULT;
+ else if (version == IPC_64)
+ err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
+ else
+ err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
+ if (err2)
+ err = -EFAULT;
+ break;
+
+ case IPC_SET:
+ if (version == IPC_64) {
+ err = get_compat_semid64_ds(&s64, compat_ptr(pad));
+ } else {
+ err = get_compat_semid_ds(&s64, compat_ptr(pad));
+ }
+ up64 = compat_alloc_user_space(sizeof(s64));
+ if (copy_to_user(up64, &s64, sizeof(s64)))
+ err = -EFAULT;
+ if (err)
+ break;
+
+ fourth.__pad = up64;
+ err = sys_semctl(first, second, third, fourth);
+ break;
+
+ default:
+ err = -EINVAL;
+ break;
+ }
+ return err;
+}
+
+long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
+{
+ struct msgbuf __user *p;
+ struct compat_msgbuf __user *up = uptr;
+ long type;
+
+ if (first < 0)
+ return -EINVAL;
+ if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
+ return -EINVAL;
+
+ p = compat_alloc_user_space(second + sizeof(struct msgbuf));
+ if (get_user(type, &up->mtype) ||
+ put_user(type, &p->mtype) ||
+ copy_in_user(p->mtext, up->mtext, second))
+ return -EFAULT;
+
+ return sys_msgsnd(first, p, second, third);
+}
+
+long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
+ int version, void __user *uptr)
+{
+ struct msgbuf __user *p;
+ struct compat_msgbuf __user *up;
+ long type;
+ int err;
+
+ if (first < 0)
+ return -EINVAL;
+ if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
+ return -EINVAL;
+
+ if (!version) {
+ struct compat_ipc_kludge ipck;
+ err = -EINVAL;
+ if (!uptr)
+ goto out;
+ err = -EFAULT;
+ if (copy_from_user (&ipck, uptr, sizeof(ipck)))
+ goto out;
+ uptr = compat_ptr(ipck.msgp);
+ msgtyp = ipck.msgtyp;
+ }
+ p = compat_alloc_user_space(second + sizeof(struct msgbuf));
+ err = sys_msgrcv(first, p, second, msgtyp, third);
+ if (err < 0)
+ goto out;
+ up = uptr;
+ if (get_user(type, &p->mtype) ||
+ put_user(type, &up->mtype) ||
+ copy_in_user(up->mtext, p->mtext, err))
+ err = -EFAULT;
+out:
+ return err;
+}
+
+static inline int get_compat_msqid64(struct msqid64_ds *m64,
+ struct compat_msqid64_ds __user *up64)
+{
+ int err;
+
+ if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
+ return -EFAULT;
+ err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
+ err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
+ return err;
+}
+
+static inline int get_compat_msqid(struct msqid64_ds *m,
+ struct compat_msqid_ds __user *up)
+{
+ int err;
+
+ if (!access_ok(VERIFY_READ, up, sizeof(*up)))
+ return -EFAULT;
+ err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
+ err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
+ return err;
+}
+
+static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
+ struct compat_msqid64_ds __user *up64)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
+ return -EFAULT;
+ err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
+ err |= __put_user(m64->msg_stime, &up64->msg_stime);
+ err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
+ err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
+ err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
+ err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
+ err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
+ err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
+ err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
+ return err;
+}
+
+static inline int put_compat_msqid_ds(struct msqid64_ds *m,
+ struct compat_msqid_ds __user *up)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
+ return -EFAULT;
+ err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
+ err |= __put_user(m->msg_stime, &up->msg_stime);
+ err |= __put_user(m->msg_rtime, &up->msg_rtime);
+ err |= __put_user(m->msg_ctime, &up->msg_ctime);
+ err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
+ err |= __put_user(m->msg_qnum, &up->msg_qnum);
+ err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
+ err |= __put_user(m->msg_lspid, &up->msg_lspid);
+ err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
+ return err;
+}
+
+long compat_sys_msgctl(int first, int second, void __user *uptr)
+{
+ int err, err2;
+ struct msqid64_ds m64;
+ int version = compat_ipc_parse_version(&second);
+ void __user *p;
+
+ switch (second & (~IPC_64)) {
+ case IPC_INFO:
+ case IPC_RMID:
+ case MSG_INFO:
+ err = sys_msgctl(first, second, uptr);
+ break;
+
+ case IPC_SET:
+ if (version == IPC_64) {
+ err = get_compat_msqid64(&m64, uptr);
+ } else {
+ err = get_compat_msqid(&m64, uptr);
+ }
+ if (err)
+ break;
+ p = compat_alloc_user_space(sizeof(m64));
+ if (copy_to_user(p, &m64, sizeof(m64)))
+ err = -EFAULT;
+ else
+ err = sys_msgctl(first, second, p);
+ break;
+
+ case IPC_STAT:
+ case MSG_STAT:
+ p = compat_alloc_user_space(sizeof(m64));
+ err = sys_msgctl(first, second, p);
+ if (err < 0)
+ break;
+ if (copy_from_user(&m64, p, sizeof(m64)))
+ err2 = -EFAULT;
+ else if (version == IPC_64)
+ err2 = put_compat_msqid64_ds(&m64, uptr);
+ else
+ err2 = put_compat_msqid_ds(&m64, uptr);
+ if (err2)
+ err = -EFAULT;
+ break;
+
+ default:
+ err = -EINVAL;
+ break;
+ }
+ return err;
+}
+
+long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
+ void __user *uptr)
+{
+ int err;
+ unsigned long raddr;
+ compat_ulong_t __user *uaddr;
+
+ if (version == 1)
+ return -EINVAL;
+ err = do_shmat(first, uptr, second, &raddr);
+ if (err < 0)
+ return err;
+ uaddr = compat_ptr(third);
+ return put_user(raddr, uaddr);
+}
+
+static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
+ struct compat_shmid64_ds __user *up64)
+{
+ if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
+ return -EFAULT;
+ return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
+}
+
+static inline int get_compat_shmid_ds(struct shmid64_ds *s,
+ struct compat_shmid_ds __user *up)
+{
+ if (!access_ok(VERIFY_READ, up, sizeof(*up)))
+ return -EFAULT;
+ return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
+}
+
+static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
+ struct compat_shmid64_ds __user *up64)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
+ return -EFAULT;
+ err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
+ err |= __put_user(s64->shm_atime, &up64->shm_atime);
+ err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
+ err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
+ err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
+ err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
+ err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
+ err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
+ return err;
+}
+
+static inline int put_compat_shmid_ds(struct shmid64_ds *s,
+ struct compat_shmid_ds __user *up)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
+ return -EFAULT;
+ err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
+ err |= __put_user(s->shm_atime, &up->shm_atime);
+ err |= __put_user(s->shm_dtime, &up->shm_dtime);
+ err |= __put_user(s->shm_ctime, &up->shm_ctime);
+ err |= __put_user(s->shm_segsz, &up->shm_segsz);
+ err |= __put_user(s->shm_nattch, &up->shm_nattch);
+ err |= __put_user(s->shm_cpid, &up->shm_cpid);
+ err |= __put_user(s->shm_lpid, &up->shm_lpid);
+ return err;
+}
+
+static inline int put_compat_shminfo64(struct shminfo64 *smi,
+ struct compat_shminfo64 __user *up64)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
+ return -EFAULT;
+ err = __put_user(smi->shmmax, &up64->shmmax);
+ err |= __put_user(smi->shmmin, &up64->shmmin);
+ err |= __put_user(smi->shmmni, &up64->shmmni);
+ err |= __put_user(smi->shmseg, &up64->shmseg);
+ err |= __put_user(smi->shmall, &up64->shmall);
+ return err;
+}
+
+static inline int put_compat_shminfo(struct shminfo64 *smi,
+ struct shminfo __user *up)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
+ return -EFAULT;
+ err = __put_user(smi->shmmax, &up->shmmax);
+ err |= __put_user(smi->shmmin, &up->shmmin);
+ err |= __put_user(smi->shmmni, &up->shmmni);
+ err |= __put_user(smi->shmseg, &up->shmseg);
+ err |= __put_user(smi->shmall, &up->shmall);
+}
+
+static inline int put_compat_shm_info(struct shm_info __user *ip,
+ struct compat_shm_info __user *uip)
+{
+ int err;
+ struct shm_info si;
+
+ if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
+ copy_from_user(&si, ip, sizeof(si)))
+ return -EFAULT;
+ err = __put_user(si.used_ids, &uip->used_ids);
+ err |= __put_user(si.shm_tot, &uip->shm_tot);
+ err |= __put_user(si.shm_rss, &uip->shm_rss);
+ err |= __put_user(si.shm_swp, &uip->shm_swp);
+ err |= __put_user(si.swap_attempts, &uip->swap_attempts);
+ err |= __put_user(si.swap_successes, &uip->swap_successes);
+ return err;
+}
+
+long compat_sys_shmctl(int first, int second, void __user *uptr)
+{
+ void __user *p;
+ struct shmid64_ds s64;
+ struct shminfo64 smi;
+ int err, err2;
+ int version = compat_ipc_parse_version(&second);
+
+ switch (second & (~IPC_64)) {
+ case IPC_RMID:
+ case SHM_LOCK:
+ case SHM_UNLOCK:
+ err = sys_shmctl(first, second, uptr);
+ break;
+
+ case IPC_INFO:
+ p = compat_alloc_user_space(sizeof(smi));
+ err = sys_shmctl(first, second, p);
+ if (err < 0)
+ break;
+ if (copy_from_user(&smi, p, sizeof(smi)))
+ err2 = -EFAULT;
+ else if (version == IPC_64)
+ err2 = put_compat_shminfo64(&smi, uptr);
+ else
+ err2 = put_compat_shminfo(&smi, uptr);
+ if (err2)
+ err = -EFAULT;
+ break;
+
+
+ case IPC_SET:
+ if (version == IPC_64) {
+ err = get_compat_shmid64_ds(&s64, uptr);
+ } else {
+ err = get_compat_shmid_ds(&s64, uptr);
+ }
+ if (err)
+ break;
+ p = compat_alloc_user_space(sizeof(s64));
+ if (copy_to_user(p, &s64, sizeof(s64)))
+ err = -EFAULT;
+ else
+ err = sys_shmctl(first, second, p);
+ break;
+
+ case IPC_STAT:
+ case SHM_STAT:
+ p = compat_alloc_user_space(sizeof(s64));
+ err = sys_shmctl(first, second, p);
+ if (err < 0)
+ break;
+ if (copy_from_user(&s64, p, sizeof(s64)))
+ err2 = -EFAULT;
+ else if (version == IPC_64)
+ err2 = put_compat_shmid64_ds(&s64, uptr);
+ else
+ err2 = put_compat_shmid_ds(&s64, uptr);
+ if (err2)
+ err = -EFAULT;
+ break;
+
+ case SHM_INFO:
+ p = compat_alloc_user_space(sizeof(struct shm_info));
+ err = sys_shmctl(first, second, p);
+ if (err < 0)
+ break;
+ err2 = put_compat_shm_info(p, uptr);
+ if (err2)
+ err = -EFAULT;
+ break;
+
+ default:
+ err = -EINVAL;
+ break;
+ }
+ return err;
+}
+
+long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
+ unsigned nsops, const struct compat_timespec __user *timeout)
+{
+ struct timespec __user *ts64 = NULL;
+ if (timeout) {
+ struct timespec ts;
+ ts64 = compat_alloc_user_space(sizeof(*ts64));
+ if (get_compat_timespec(&ts, timeout))
+ return -EFAULT;
+ if (copy_to_user(ts64, &ts, sizeof(ts)))
+ return -EFAULT;
+ }
+ return sys_semtimedop(semid, tsems, nsops, ts64);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 10:25:07 +0000