bsd-user: Add host_to_target_semid_ds for semctl(2)

Add host_to_target_semid_ds() to convert host struct semid_ds to target
format for semctl(2) IPC_STAT operations.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>

bsd-user/bsd-misc.c

@@ -116,3 +116,23 @@ abi_long target_to_host_semid_ds(struct semid_ds *host_sd,
     unlock_user_struct(target_sd, target_addr, 0);
     return 0;
 }
+
+abi_long host_to_target_semid_ds(abi_ulong target_addr,
+        struct semid_ds *host_sd)
+{
+    struct target_semid_ds *target_sd;
+
+    if (!lock_user_struct(VERIFY_WRITE, target_sd, target_addr, 0)) {
+        return -TARGET_EFAULT;
+    }
+    host_to_target_ipc_perm__locked(&target_sd->sem_perm,
+                                    &host_sd->sem_perm);
+    /* sem_base is not used by kernel for IPC_STAT/IPC_SET */
+    /* target_sd->sem_base = h2g((void *)host_sd->sem_base); */
+    __put_user(target_sd->sem_nsems, &host_sd->sem_nsems);
+    __put_user(target_sd->sem_otime, &host_sd->sem_otime);
+    __put_user(target_sd->sem_ctime, &host_sd->sem_ctime);
+    unlock_user_struct(target_sd, target_addr, 1);
+
+    return 0;
+}