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Hey guys,

I'm currently developing my memory management system. Now I set up the kernels page directory with one page table, identity mapping the first 4 Mebibyte of memory.

Now when activating paging, I am able to access the memory from 0x000000 to 0x3FFFFC, but when I want to use 0x3FFFFD, 0x3FFFFE or 0x3FFFFF I get a page fault.

So I just set up the directory, zero each entry, then set up the first table, map 4MiB and enable paging. Do you have an idea whats wrong with it (allocator.getPage() returns a value higher than 0x400000 representing a free memory area)?

http://pastebin.com/Ts4SJt5v

Thanks in advance

\me holds his eyes closed, trying to nail this one without looking at the code

Could it be that your "access" is accessing an int (4 bytes)?

You are right, thank you very much for your help.

Problem solved

You seem to have serious trouble with the idea that data has a length.