Hello, I would like to remind this email about binfmt_misc for PE. On Thursday 06 July 2023 13:55:50 Pali Rohár wrote: > Hello, > > I would like to ask how to properly register binfmt_misc for different > PE binaries, so kernel could execute the correct loader for them. > > I mean, how to register support for Win32 (console/gui) PE binaries and > also for CLR PE binaries (dotnet). Win32 needs to be executed under wine > and CLR ideally under dotnet core (or mono). > > I have read kernel documentation files admin-guide/binfmt-misc.rst > and admin-guide/mono.rst. But seems that they are in conflicts as both > wants to registers its own handler for the same magic: > > echo ':DOSWin:M::MZ::/usr/local/bin/wine:' > register > > echo ':CLR:M::MZ::/usr/bin/mono:' > /proc/sys/fs/binfmt_misc/register > > Not mentioning the fact that they register DOS MZ handler, which matches > not only all PE binaries (including EFI, libraries, other processors), > but also all kind of other NE/LE/LX binaries and different DOS extenders. > > From documentation it looks like that even registering PE binaries is > impossible by binfmt_misc as PE is detected by checking that indirect > reference from 0x3C is PE\0\0. And distinguish between Win32 and CLR > needs to parse PE COM descriptor directory. > > Or it is possible to write binfmt_misc pattern match based on indirect > offset?
