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This is the header stored at the beginning of unused blocks of FCRAM memory. The kernel maintains these structures to keep a list of free blocks and their sizes.

By overwriting the pointers in instances of this struct (e.g. using an attack like gspwn) and then (de)allocating memory, one can achieve a controlled ARM11 kernel-mode write on system versions up to 9.2 (memchunkhax).

Size : 0xC bytes

Offset Type Description
0x0 u32 Size in pages
0x4 MemoryBlockHeader* Next
0x8 MemoryBlockHeader* Prev