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author | Rich Felker <dalias@aerifal.cx> | 2011-04-08 09:24:19 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2011-04-08 09:24:19 -0400 |
commit | 7168790763cdeb794df52be6e3b39fbb021c5a64 (patch) | |
tree | fa302a8cb7f16d6201db3499082cc6b70012769a /arch/x86_64 | |
parent | 5b8d81f706da0b7dc0abb5d0d74595d5b2f60d52 (diff) | |
download | musl-7168790763cdeb794df52be6e3b39fbb021c5a64.tar.gz |
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...
Diffstat (limited to 'arch/x86_64')
-rw-r--r-- | arch/x86_64/bits/socket.h | 4 |
1 files changed, 2 insertions, 2 deletions
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; }; |