GitHub - shreyaakamath/Xv6-StackRelocation-ExceptionHandling: modify the xv6 kernel to support null pointers and relocate the user stack to the bottom of the address space

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modify the xv6 kernel to support null pointers and relocate the user stack to the bottom of the address space

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Name		Name	Last commit message	Last commit date
Latest commit History 1 Commit
xv6		xv6
README		README

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Author names: Shreya Kamath,Mushahid Alam

CS login : shreyakamath,mushahid

description:
*added an invalid page for page 0 -> this causes  null pointer deference to cause a segfault 

*stack is at the end of the user space -> user can grow stack by allocating more than 4096 bytes. stack grows one page at a time 

*added a guard page between stack and heap -> heap will not overwrite stack , stack will not overwrite heap