diff options
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/compat.c | 158 |
1 files changed, 66 insertions, 92 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index 1da2e2e..6cb6a4d 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) |
