From: Stacey Son <sson@FreeBSD.org>

Add host_to_target_semarray() to convert host semaphore array to target
format for semctl(2) GETALL 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 | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/bsd-user/bsd-misc.c b/bsd-user/bsd-misc.c
index d1645db46b..65fd7b72e5 100644
--- a/bsd-user/bsd-misc.c
+++ b/bsd-user/bsd-misc.c
@@ -68,3 +68,33 @@ abi_long target_to_host_semarray(int semid, unsigned short **host_array,
 
     return 0;
 }
+
+abi_long host_to_target_semarray(int semid, abi_ulong target_addr,
+        unsigned short **host_arrayp)
+{
+    g_autofree unsigned short *host_array = *host_arrayp;
+    abi_long ret;
+    int nsems, i;
+    unsigned short *array;
+    union semun semun;
+    struct semid_ds semid_ds;
+
+    semun.buf = &semid_ds;
+
+    ret = semctl(semid, 0, IPC_STAT, semun);
+    if (ret == -1) {
+        return get_errno(ret);
+    }
+
+    nsems = semid_ds.sem_nsems;
+    array = (unsigned short *)lock_user(VERIFY_WRITE, target_addr,
+        nsems * sizeof(unsigned short), 0);
+    if (array == NULL) {
+        return -TARGET_EFAULT;
+    }
+    for (i = 0; i < nsems; i++) {
+        __put_user(array[i], host_array + i);
+    }
+    unlock_user(array, target_addr, 1);
+    return 0;
+}
-- 
2.52.0