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memchunkhdr = a data structure describing chunks of memory allocated by the ARM11 kernel.
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Here is some code describing the layout of a memory chunk header.
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This is the header that the kernel uses to implement the FCRAM heap.
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struct MemoryChunkHeader {
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Size : 0xC bytes?
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int num_pages; // size of this chunk in terms of small pages
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void* next;
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void* prev;
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int unk1;
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int unk2;
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};
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The "next" and "prev" members are used to implement a linked-list. In fact, chances are this is actually a kernel object inherited from [[KLinkedList]].