On 2/6/26 03:26, Warner Losh wrote:
From: Stacey Son <[email protected]>
Add host_to_target_msqid_ds() to convert host struct msqid_ds to target
format for msgctl(2) IPC_STAT operations.
Signed-off-by: Stacey Son <[email protected]>
Signed-off-by: Brooks Davis <[email protected]>
Signed-off-by: Sean Bruno <[email protected]>
Signed-off-by: Mikael Urankar <[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 e7031c5264..03773e2620 100644
--- a/bsd-user/bsd-misc.c
+++ b/bsd-user/bsd-misc.c
@@ -187,3 +187,36 @@ abi_long target_to_host_msqid_ds(struct msqid_ds *host_md,
return 0;
}
+
+abi_long host_to_target_msqid_ds(abi_ulong target_addr,
+ struct msqid_ds *host_md)
+{
+ struct target_msqid_ds *target_md;
+
+ if (!lock_user_struct(VERIFY_WRITE, target_md, target_addr, 0)) {
+ return -TARGET_EFAULT;
+ }
+
+ memset(target_md, 0, sizeof(struct target_msqid_ds));
+ host_to_target_ipc_perm__locked(&target_md->msg_perm,
+ &host_md->msg_perm);
+
+ /* msg_first and msg_last are not used by IPC_SET/IPC_STAT in kernel. */
+ target_md->msg_cbytes = tswapal(host_md->msg_cbytes);
+ target_md->msg_qnum = tswapal(host_md->msg_qnum);
+ target_md->msg_qbytes = tswapal(host_md->msg_qbytes);
+ target_md->msg_lspid = tswapal(host_md->msg_lspid);
+ target_md->msg_lrpid = tswapal(host_md->msg_lrpid);
+#if defined(TARGET_I386)
+ target_md->msg_stime = tswap32(host_md->msg_stime);
+ target_md->msg_rtime = tswap32(host_md->msg_rtime);
+ target_md->msg_ctime = tswap32(host_md->msg_ctime);
+#else
+ target_md->msg_stime = tswap64(host_md->msg_stime);
+ target_md->msg_rtime = tswap64(host_md->msg_rtime);
+ target_md->msg_ctime = tswap64(host_md->msg_ctime);
+#endif
+ unlock_user_struct(target_md, target_addr, 1);
+
+ return 0;
+}
Use __get_user and you won't need the ifdef, since the size of the type is then
automatically handled.
r~
