Problems adding a custom section to a Windows binary

This is slightly offtopic, but maybe some of the Windows folks know an answer to this question. I've been working on #9686 https://ghc.haskell.org/trac/ghc/ticket/9686, but have been blocked by Windows rejecting all my attempts to add a custom section to a binary withthe error "bash: ./c.exe: cannot execute binary file: Exec format error". I'm not sure if this is a gcc/binutils bug or not (the exact same commands with the same tools work fine on Linux binaries). I have filed http://sourceforge.net/p/mingw/bugs/2239 and https://sourceware.org/bugzilla/show_bug.cgi?id=17466 to see what the developers say, but have not gotten a response yet. Perhaps someone here knows what's going on? -- Gintautas Miliauskas