From: Stacey Son <sson@FreeBSD.org>
Add target_to_host_msqid_ds() to convert target struct msqid_ds to host
format for msgctl(2) IPC_SET operations. Uses memset to zero the struct
rather than directly accessing kernel-only members. Handles FreeBSD
64-bit time_t except on i386.
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Brooks Davis <brooks@one-eyed-alien.net>
Signed-off-by: Sean Bruno <sbruno@FreeBSD.org>
Signed-off-by: Mikael Urankar <mikael.urankar@gmail.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
bsd-user/bsd-misc.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/bsd-user/bsd-misc.c b/bsd-user/bsd-misc.c
index 9c47073c5a..62362e8204 100644
--- a/bsd-user/bsd-misc.c
+++ b/bsd-user/bsd-misc.c
@@ -150,3 +150,30 @@ abi_long host_to_target_semid_ds(abi_ulong target_addr,
return 0;
}
+
+abi_long target_to_host_msqid_ds(struct msqid_ds *host_md,
+ abi_ulong target_addr)
+{
+ struct target_msqid_ds *target_md;
+
+ if (!lock_user_struct(VERIFY_READ, target_md, target_addr, 1)) {
+ return -TARGET_EFAULT;
+ }
+
+ memset(host_md, 0, sizeof(struct msqid_ds));
+ target_to_host_ipc_perm__locked(&host_md->msg_perm,
+ &target_md->msg_perm);
+
+ /* msg_first and msg_last are not used by IPC_SET/IPC_STAT in kernel. */
+ __get_user(host_md->msg_cbytes, &target_md->msg_cbytes);
+ __get_user(host_md->msg_qnum, &target_md->msg_qnum);
+ __get_user(host_md->msg_qbytes, &target_md->msg_qbytes);
+ __get_user(host_md->msg_lspid, &target_md->msg_lspid);
+ __get_user(host_md->msg_lrpid, &target_md->msg_lrpid);
+ __get_user(host_md->msg_stime, &target_md->msg_stime);
+ __get_user(host_md->msg_rtime, &target_md->msg_rtime);
+ __get_user(host_md->msg_ctime, &target_md->msg_ctime);
+ unlock_user_struct(target_md, target_addr, 0);
+
+ return 0;
+}
--
2.52.0