From: Stacey Son <[email protected]>

Add host_to_target_semarray() to convert host semaphore array to target
format for semctl(2) GETALL operations.

Signed-off-by: Stacey Son <[email protected]>
Signed-off-by: Warner Losh <[email protected]>
---
 bsd-user/bsd-misc.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/bsd-user/bsd-misc.c b/bsd-user/bsd-misc.c
index d9eb87db80..677cb49d27 100644
--- a/bsd-user/bsd-misc.c
+++ b/bsd-user/bsd-misc.c
@@ -79,3 +79,36 @@ 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) {
+        free(host_array);
+        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) {
+        free(host_array);
+        return -TARGET_EFAULT;
+    }
+    for (i = 0; i < nsems; i++) {
+        __put_user(array[i], host_array + i);
+    }
+    free(host_array);
+    unlock_user(array, target_addr, 1);
+    return 0;
+}

-- 
2.52.0


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