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ExeFS or Executable Filesystem, is the part of the CXI, which is executed when the CXI is run. And contains:
=== Overview ===
ExeFS or Executable Filesystem, is the part of the CXI, which is executed when the CXI is run.
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.
* .code Contains the code binary, which can be optionally reverse-LZSS compressed via an exheader flag.
* [[logo]] Contains distribution licensing Binary data.
* [[logo|.logo]] Contains distribution licensing Binary data.
* [[File Formats|banner]] Contains the banner which homemenu uses for this CXI.
* [[File Formats|.banner]] Contains the banner which homemenu uses for this CXI.
* [[SMDH|icon]] Contains the icon which homemenu displays for this CXI.
* [[SMDH|.icon]] Contains the icon which homemenu displays for this CXI.
=== AFTER DECRYPTION ===
=== Format ===
The ExeFS header is 0x200 bytes long and follows this structure:
The ExeFS header is 0x200 bytes long and follows this simple structure:
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
| 0x00
| 0x00
| 0x05
| 0x80
| Always '.code'
| File headers (8 headers maximum, 16 bytes each)
|-
|-
| 0x05
| 0x80
| 0x03
| 0x80
| Reserved
| Reserved
|-
|-
| 0x08
| 0x100
| 0x04
| 0x100
| ARM Code Offset*
| File hashes (8 hashes maximum, 32 bytes each, one for each header)
|-
|}
==== File headers ====
| ARM Code Length
There are a maximum of 8 file headers in the ExeFS format, which have the following structure:
{| class="wikitable" border="1"
|-
|-
! START
! SIZE
! DESCRIPTION
|-
|-
| 0x1C
| 0x0
| 0x04
| 0x8
| Banner Length
| File name
|-
|-
| 0x20
| 0x8
| 0x04
| 0x4
| Always 'icon'
| File offset
|-
|-
| 0xC
| 0x4
| File size
|}
|}
==== File hashes ====
Each file header has a corresponding file hash, which is the SHA256 hash calculated over the entire file contents.
<nowiki>* Offsets are non-inclusive of the header's size(0x200 bytes).</nowiki>
<nowiki>* Offsets are non-inclusive of the header's size(0x200 bytes).</nowiki>