ExeFS

ExeFS or Executable Filesystem, is the part of the CXI, which contains information related to the executable program.

The ExeFS usually contains one or more of the following files:

.code Contains the code binary, which can be optionally reverse-LZSS compressed via an exheader flag.
.logo Contains distribution licensing Binary data.
.banner Contains the banner which homemenu uses for this CXI.
.icon Contains the icon which homemenu displays for this CXI.

The ExeFS header is 0x200 bytes long and follows this simple structure:

START	SIZE	DESCRIPTION
0x00	0x80	File headers (8 headers maximum, 16 bytes each)
0x80	0x80	Reserved
0x100	0x100	File hashes (8 hashes maximum, 32 bytes each, one for each header)

There are a maximum of 8 file headers in the ExeFS format, which have the following structure:

Each file header has a corresponding file hash, which is the SHA256 hash calculated over the entire file contents.

* Offsets are non-inclusive of the header's size(0x200 bytes).

** The 'Logo' is not a compulsory part of ExeFS, so an ExeFS without a 'Logo', will have these entries of the header filled with zeros. .