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Complete pagefault handler

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This commit is contained in:
Mathieu Maret 2018-11-20 17:43:19 +01:00
parent 8108c8f3ab
commit 432d8801e1
1 changed files with 9 additions and 2 deletions
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11
core/exception_handler.c
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@ -11,14 +11,21 @@ __attribute__((interrupt)) void print_handler(struct interrupt_frame *frame, ulo
(void)error_code;
}
// c.f. https://wiki.osdev.org/Paging#Handling
// error_code bit0: Present ?
// bit1: Trying to write ?
// bit2: User page try to access?
__attribute__((interrupt)) void pagefault_handler(struct interrupt_frame *frame, ulong error_code){
__attribute__((interrupt)) void pagefault_handler(struct interrupt_frame *frame,
ulong error_code)
{
// A page fault has occurred.
// The faulting address is stored in the CR2 register.
uint32_t faulting_address;
asm volatile("mov %%cr2, %0" : "=r"(faulting_address));
printStringDetails("PAGE FAULT", RED, BLACK, 0, VGA_HEIGHT - 1);
printIntDetails(error_code, RED, BLACK, 11, VGA_HEIGHT - 1);
(void)faulting_address;
(void)frame;
(void)error_code;
}