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fix paging: invalidate tlb

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This commit is contained in:
Christoph Urlacher
2022-07-27 23:43:50 +02:00
parent 5b556f9446
commit 8430c50318
2 changed files with 6 additions and 2 deletions
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6
c_os/kernel/Paging.cc
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@ -107,6 +107,8 @@ void pg_write_protect_page(const unsigned int* p_page) {
unsigned int mask = PAGE_WRITEABLE; // fill to 32bit unsigned int mask = PAGE_WRITEABLE; // fill to 32bit
*page = *page & ~mask; // set writable to 0 *page = *page & ~mask; // set writable to 0
invalidate_tlb_entry(p_page);
} }
/***************************************************************************** /*****************************************************************************
@ -122,6 +124,8 @@ void pg_notpresent_page(const unsigned int* p_page) {
unsigned int mask = PAGE_PRESENT; unsigned int mask = PAGE_PRESENT;
*page = *page & ~mask; // set present to 0 *page = *page & ~mask; // set present to 0
invalidate_tlb_entry(p_page);
} }
/***************************************************************************** /*****************************************************************************
@ -206,4 +210,4 @@ void pg_init() {
// Paging aktivieren (in startup.asm) // Paging aktivieren (in startup.asm)
paging_on(reinterpret_cast<unsigned int*>(PAGE_DIRECTORY)); paging_on(reinterpret_cast<unsigned int*>(PAGE_DIRECTORY));
} }

2
c_os/kernel/Paging.h
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@ -55,7 +55,7 @@
// Externe Funktionen in startup.asm // Externe Funktionen in startup.asm
extern "C" { extern "C" {
void paging_on(unsigned int* p_pdir); // Paging einschalten void paging_on(unsigned int* p_pdir); // Paging einschalten
void invalidate_tlb_entry(unsigned int* ptr); // Page in TLB invalid. void invalidate_tlb_entry(const unsigned int* ptr); // Page in TLB invalid.
} }
// ativiert paging // ativiert paging