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Clear U bit for second stack page so that it functions as a guard page

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Frans Kaashoek 2019-07-22 15:38:08 -04:00
parent 38b430687c
commit b2e9c8eea5
3 changed files with 13 additions and 1 deletions
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3
kernel/defs.h
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@ -192,9 +192,10 @@ void unmappages(pagetable_t, uint64, uint64, int);
uint64 walkaddr(pagetable_t, uint64);
int copyout(pagetable_t, uint64, char *, uint64);
int copyin(pagetable_t, char *, uint64, uint64);
int copyinstr(pagetable_t pagetable, char *dst, uint64 srcva, uint64 max);
int copyinstr(pagetable_t, char *, uint64, uint64);
char* map_kstack();
uint64 kernelpa(uint64);
void clearpteu(pagetable_t, uint64);
// plic.c
void plicinit(void);