Notably, malloc() cannot be implemented because none of the system calls required for this project allow for memory allocation.
so we have provided a simple but complete file system in the filesys directory.
There is no need to modify the file system code for this project,
You need to be able to create a simulated disk with a file system partition. The pintos-mkdisk program provides this functionality. From the userprog/build directory, execute pintos-mkdisk filesys.dsk --filesys-size=2.
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