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author | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-09 10:27:22 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-15 20:46:45 -0400 |
commit | 20bc2a3aff5a88a666e81182fd277ea2a521fd3d (patch) | |
tree | 5834be6c2b551d9429c250b6c620f32dedb9ed0c /ipc/compat.c | |
parent | 28327fae62b011216026b66299882c53b95b4500 (diff) | |
download | linux-20bc2a3aff5a88a666e81182fd277ea2a521fd3d.tar.gz linux-20bc2a3aff5a88a666e81182fd277ea2a521fd3d.tar.bz2 linux-20bc2a3aff5a88a666e81182fd277ea2a521fd3d.zip |
ipc(2): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc/compat.c')
-rw-r--r-- | ipc/compat.c | 98 |
1 files changed, 4 insertions, 94 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index 3c25ca1e46c7..00c2e3beccc8 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -39,11 +39,6 @@ struct compat_msgbuf { char mtext[1]; }; -struct compat_ipc_kludge { - compat_uptr_t msgp; - compat_long_t msgtyp; -}; - int get_compat_ipc64_perm(struct ipc64_perm *to, struct compat_ipc64_perm __user *from) { @@ -104,95 +99,6 @@ static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bu return msgsz; } -#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; - - switch (call) { - case SEMOP: - /* struct sembuf is the same on 32 and 64bit :)) */ - return sys_semtimedop(first, compat_ptr(ptr), second, NULL); - case SEMTIMEDOP: - return compat_sys_semtimedop(first, compat_ptr(ptr), second, - compat_ptr(fifth)); - case SEMGET: - return sys_semget(first, second, third); - case SEMCTL: - if (!ptr) - return -EINVAL; - if (get_user(pad, (u32 __user *) compat_ptr(ptr))) - return -EFAULT; - return compat_sys_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; - - 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, (s32)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: { - 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: - return sys_shmget(first, (unsigned)second, third); - case SHMCTL: - return compat_sys_shmctl(first, second, compat_ptr(ptr)); - } - - return -ENOSYS; -} -#endif - COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp, compat_ssize_t, msgsz, int, msgflg) { @@ -211,6 +117,10 @@ COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp, msgflg, compat_do_msg_fill); } +#ifndef COMPAT_SHMLBA +#define COMPAT_SHMLBA SHMLBA +#endif + COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg) { unsigned long ret; |