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my solution to lab5

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winPond
2019-07-11 19:40:12 +08:00
parent 1f043fb694
commit f78713349c
364 changed files with 8775 additions and 3249 deletions
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14
lab/lib/pageref.c Normal file
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@@ -0,0 +1,14 @@
#include <inc/lib.h>
int
pageref(void *v)
{
pte_t pte;
if (!(uvpd[PDX(v)] & PTE_P))
return 0;
pte = uvpt[PGNUM(v)];
if (!(pte & PTE_P))
return 0;
return pages[PGNUM(pte)].pp_ref;
}