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This commit is contained in:
Justine Tunney 2020-12-01 03:43:40 -08:00
parent 3e4fd4b0ad
commit e44a0cf6f8
256 changed files with 23100 additions and 2294 deletions
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9
ape/lib/getpagetableentry.c
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@ -20,12 +20,13 @@
#include "ape/lib/pc.h"
#include "libc/assert.h"
textreal static uint64_t pushpagetable(uint64_t *ptsp) {
static textreal uint64_t __pushpagetable(uint64_t *ptsp) {
return (*ptsp -= PAGESIZE) | PAGE_V | PAGE_RW;
}
textreal uint64_t *getpagetableentry(int64_t vaddr, unsigned depth,
struct PageTable *pml4t, uint64_t *ptsp) {
textreal uint64_t *__getpagetableentry(int64_t vaddr, unsigned depth,
struct PageTable *pml4t,
uint64_t *ptsp) {
uint64_t *entry;
unsigned char shift;
assert(depth <= 3);
@ -36,7 +37,7 @@ textreal uint64_t *getpagetableentry(int64_t vaddr, unsigned depth,
entry = &pml4t->p[(vaddr >> shift) & 511];
if (!depth--) return entry;
shift -= 9;
if (!*entry) *entry = pushpagetable(ptsp);
if (!*entry) *entry = __pushpagetable(ptsp);
pml4t = (void *)(*entry & PAGE_TA);
}
}