From 7168790763cdeb794df52be6e3b39fbb021c5a64 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 8 Apr 2011 09:24:19 -0400 Subject: workaround broken msghdr struct on 64bit linux POSIX clearly specifies the type of msg_iovlen and msg_controllen, and Linux ignores it and makes them both size_t instead. to work around this we add padding (instead of just using the wrong types like glibc does), but we also need to patch-up the struct before passing it to the kernel in case the caller did not zero-fill it. if i could trust the kernel to just ignore the upper 32 bits, this would not be necessary, but i don't think it will ignore them... --- arch/x86_64/bits/socket.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/x86_64/bits') diff --git a/arch/x86_64/bits/socket.h b/arch/x86_64/bits/socket.h index b3230625..0e5ee1aa 100644 --- a/arch/x86_64/bits/socket.h +++ b/arch/x86_64/bits/socket.h @@ -3,9 +3,9 @@ struct msghdr void *msg_name; socklen_t msg_namelen; struct iovec *msg_iov; - int msg_iovlen; + int msg_iovlen, __pad1; void *msg_control; - socklen_t msg_controllen; + socklen_t msg_controllen, __pad2; int msg_flags; }; -- cgit v1.2.1