aboutsummaryrefslogtreecommitdiff
path: root/ipc/compat.c
diff options
context:
space:
mode:
Diffstat (limited to 'ipc/compat.c')
-rw-r--r--ipc/compat.c158
1 files changed, 66 insertions, 92 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index 1da2e2eb9d7..6cb6a4df86e 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -306,7 +306,7 @@ static long do_compat_semctl(int first, int second, int third, u32 pad)
return err;
}
-long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
+static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
{
struct compat_msgbuf __user *msgp = dest;
size_t msgsz;
@@ -320,59 +320,16 @@ long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
return msgsz;
}
-#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
-long compat_sys_semctl(int first, int second, int third, void __user *uptr)
-{
- u32 pad;
-
- if (!uptr)
- return -EINVAL;
- if (get_user(pad, (u32 __user *) uptr))
- return -EFAULT;
- return do_compat_semctl(first, second, third, pad);
-}
-
-long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
-{
- struct compat_msgbuf __user *up = uptr;
- long type;
-
- if (first < 0)
- return -EINVAL;
- if (second < 0)
- return -EINVAL;
-
- if (get_user(type, &up->mtype))
- return -EFAULT;
-
- return do_msgsnd(first, type, up->mtext, second, third);
-}
-
-long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
- int version, void __user *uptr)
-{
- if (first < 0)
- return -EINVAL;
- if (second < 0)
- return -EINVAL;
-
- if (!version) {
- struct compat_ipc_kludge ipck;
- if (!uptr)
- return -EINVAL;
- if (copy_from_user (&ipck, uptr, sizeof(ipck)))
- return -EFAULT;
- uptr = compat_ptr(ipck.msgp);
- msgtyp = ipck.msgtyp;
- }
- return do_msgrcv(first, uptr, second, msgtyp, third,
- compat_do_msg_fill);
-}
+#ifndef COMPAT_SHMLBA
+#define COMPAT_SHMLBA SHMLBA
+#endif
+#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
u32, third, compat_uptr_t, ptr, u32, fifth)
{
int version;
+ u32 pad;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
@@ -387,21 +344,59 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
case SEMGET:
return sys_semget(first, second, third);
case SEMCTL:
- return compat_sys_semctl(first, second, third, compat_ptr(ptr));
+ if (!ptr)
+ return -EINVAL;
+ if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
+ return -EFAULT;
+ return do_compat_semctl(first, second, third, pad);
+
+ case MSGSND: {
+ struct compat_msgbuf __user *up = compat_ptr(ptr);
+ compat_long_t type;
+
+ if (first < 0 || second < 0)
+ return -EINVAL;
- case MSGSND:
- return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
- case MSGRCV:
- return compat_sys_msgrcv(first, second, fifth, third,
- version, compat_ptr(ptr));
+ if (get_user(type, &up->mtype))
+ return -EFAULT;
+
+ return do_msgsnd(first, type, up->mtext, second, third);
+ }
+ case MSGRCV: {
+ void __user *uptr = compat_ptr(ptr);
+
+ if (first < 0 || second < 0)
+ return -EINVAL;
+
+ if (!version) {
+ struct compat_ipc_kludge ipck;
+ if (!uptr)
+ return -EINVAL;
+ if (copy_from_user (&ipck, uptr, sizeof(ipck)))
+ return -EFAULT;
+ uptr = compat_ptr(ipck.msgp);
+ fifth = ipck.msgtyp;
+ }
+ return do_msgrcv(first, uptr, second, fifth, third,
+ compat_do_msg_fill);
+ }
case MSGGET:
return sys_msgget(first, second);
case MSGCTL:
return compat_sys_msgctl(first, second, compat_ptr(ptr));
- case SHMAT:
- return compat_sys_shmat(first, second, third, version,
- compat_ptr(ptr));
+ case SHMAT: {
+ int err;
+ unsigned long raddr;
+
+ if (version == 1)
+ return -EINVAL;
+ err = do_shmat(first, compat_ptr(ptr), second, &raddr,
+ COMPAT_SHMLBA);
+ if (err < 0)
+ return err;
+ return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
+ }
case SHMDT:
return sys_shmdt(compat_ptr(ptr));
case SHMGET:
@@ -412,29 +407,30 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
return -ENOSYS;
}
-#else
-long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
+#endif
+
+COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
{
return do_compat_semctl(semid, semnum, cmd, arg);
}
-long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
- compat_ssize_t msgsz, int msgflg)
+COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
+ compat_ssize_t, msgsz, int, msgflg)
{
+ struct compat_msgbuf __user *up = compat_ptr(msgp);
compat_long_t mtype;
- if (get_user(mtype, &msgp->mtype))
+ if (get_user(mtype, &up->mtype))
return -EFAULT;
- return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg);
+ return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
}
-long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
- compat_ssize_t msgsz, long msgtyp, int msgflg)
+COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
+ compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
{
- return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg,
- compat_do_msg_fill);
+ return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp,
+ msgflg, compat_do_msg_fill);
}
-#endif
static inline int get_compat_msqid64(struct msqid64_ds *m64,
struct compat_msqid64_ds __user *up64)
@@ -552,28 +548,7 @@ long compat_sys_msgctl(int first, int second, void __user *uptr)
return err;
}
-#ifndef COMPAT_SHMLBA
-#define COMPAT_SHMLBA SHMLBA
-#endif
-
-#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
-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, COMPAT_SHMLBA);
- if (err < 0)
- return err;
- uaddr = compat_ptr(third);
- return put_user(raddr, uaddr);
-}
-#else
-long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
+COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
{
unsigned long ret;
long err;
@@ -584,7 +559,6 @@ long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
force_successful_syscall_return();
return (long)ret;
}
-#endif
static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
struct compat_shmid64_ds __user *up64)
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 03:16:07 +0000