2/ and that array of pages (or, rather, array of meta data, one entry per page) is of size 0x1000, and we calculate that we want page 0x3fff ...which is bigger than 0x1000. So we index past the end of the array. And segv a SECOND time.
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5/ solved it! I was doing math wrong. if p is a pointer to addr 0x100 and q is a pointer to 0x104 what's the delta between the two? if (char *) pointers, then 4 if (word *) pointers, then 1 my bad
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