PSP directory may have multiple sub directories
@rihter007 is already working on this.
Since Apr 25, 2022.
- Dominant language
- Go
- Stars
- 373
- Forks
- 59
- PR merge metrics
- No merged PRs in 30d
Description
From Steam Deck firmware, we can obtain the follow:
- one level 1 PSP directory that points to two further locations
- both locations each point to a PSP recovery directory
The current data structure has thus the following issues:
- only a single level 2 directory is supported for each legacy and modern PSP
- the range (offset + length) is decoupled from the directory itself; it should be part of the directory
## Excerpts
### PSP level 1 directory
```
00021000: 2450 5350 a100 4f07 0200 0000 0000 0000 $PSP..O.........
00021010: 4800 0000 0000 0000 0000 0600 0000 0000 H...............
00021020: 4a00 0000 0000 0000 0000 0700 0000 0000 J...............
```
These point to another location each.
### PSP level 2 recovery directory A:
```
00060000: 0200 0000 0300 0000 ff00 0000 0000 0800 ................
```
### PSP level 2 recovery directory B:
```
00070000: 0100 0000 0300 0000 ff00 0000 0000 8800 ................
```
### Actual level 2 directories
```
00080000: 2450 4c32 36b1 638b 1a00 0000 0206 0040 $PL26.c........@
00080010: 0000 0000 4004 0000 0004 0000 0000 0080 ....@...........
00080020: 0100 0000 0022 0000 0009 0000 0000 0080 ....."..........
00080030: 7300 0000 80f6 0000 002b 0000 0000 0080 s........+......
00080040: 0200 0000 5043 0100 0022 0100 0000 0080 ....PC..."......
00080050: 0400 0000 0000 0200 0020 2600 0000 0080 ......... &.....
00080060: 0800 0000 0002 0400 0066 0200 0000 0080 .........f......
00080070: 0900 0000 4004 0000 0068 0600 0000 0080 ....@....h......
```
```
00880000: 2450 4c32 36b1 638b 1a00 0000 0206 0040 $PL26.c........@
00880010: 0000 0000 4004 0000 0004 0000 0000 0080 ....@...........
00880020: 0100 0000 0022 0000 0009 0000 0000 0080 ....."..........
00880030: 7300 0000 80f6 0000 002b 0000 0000 0080 s........+......
00880040: 0200 0000 5043 0100 0022 0100 0000 0080 ....PC..."......
00880050: 0400 0000 0000 0200 0020 2600 0000 0080 ......... &.....
00880060: 0800 0000 0002 0400 0066 0200 0000 0080 .........f......
00880070: 0900 0000 4004 0000 0068 0600 0000 0080 ....@....h......
00880080: 0b00 0000 ffff ffff 4100 0000 0000 0000 ........A.......
```
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.