Difference between revisions of "3DSX Format"
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Steveice10 (talk | contribs) (Add extended header.) |
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| Line 3: | Line 3: | ||
The file is structured like this: | The file is structured like this: | ||
* Header | * Header | ||
| + | * Extended Header, if the header size field is greater than 32. | ||
* Code relocation table header | * Code relocation table header | ||
* Rodata relocation table header | * Rodata relocation table header | ||
| Line 12: | Line 13: | ||
* Rodata relocation table | * Rodata relocation table | ||
* Data relocation table | * Data relocation table | ||
| + | * [[SMDH]] data, if there is an extended header. | ||
| + | * [[RomFS]] data, if there is an extended header. | ||
== Header == | == Header == | ||
| Line 55: | Line 58: | ||
| 4 | | 4 | ||
| Bss segment size | | Bss segment size | ||
| + | |} | ||
| + | |||
| + | == Extended Header == | ||
| + | {| class="wikitable" border="1" | ||
| + | |- | ||
| + | ! Offset | ||
| + | ! Size | ||
| + | ! Description | ||
| + | |- | ||
| + | | 0x0 | ||
| + | | 4 | ||
| + | | [[SMDH]] offset. | ||
| + | |- | ||
| + | | 0x4 | ||
| + | | 4 | ||
| + | | [[SMDH]] size. | ||
| + | |- | ||
| + | | 0x8 | ||
| + | | 4 | ||
| + | | [[RomFS]] offset. | ||
|} | |} | ||
Revision as of 21:48, 21 November 2015
The 3DSX format is an executable file-format designed for homebrew applications on the 3DS.
The file is structured like this:
- Header
- Extended Header, if the header size field is greater than 32.
- Code relocation table header
- Rodata relocation table header
- Data relocation table header
- Code segment
- Rodata segment
- Data segment
- Code relocation table
- Rodata relocation table
- Data relocation table
- SMDH data, if there is an extended header.
- RomFS data, if there is an extended header.
Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 4 | Magic (3DSX) |
| 0x4 | 2 | Header size |
| 0x6 | 2 | Relocation Header size |
| 0x8 | 4 | Format version |
| 0xC | 4 | Flags |
| 0x10 | 4 | Code segment size |
| 0x14 | 4 | Rodata segment size |
| 0x18 | 4 | Data segment size (including bss) |
| 0x1C | 4 | Bss segment size |
Extended Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 4 | SMDH offset. |
| 0x4 | 4 | SMDH size. |
| 0x8 | 4 | RomFS offset. |
Relocation Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 4 | Number of absolute relocations |
| 0x4 | 4 | Number of relative relocations |
Relocation
| Offset | Size | Description |
|---|---|---|
| 0x0 | 2 | Number of words to skip |
| 0x2 | 2 | Number of words to patch |