mathieu/matos
1
1
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Complete pagefault handler

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
core/exception_handler.c
View File

@ -11,14 +11,21 @@ __attribute__((interrupt)) void print_handler(struct interrupt_frame *frame, ulo
(void)error_code; (void)error_code;
} }
// c.f. https://wiki.osdev.org/Paging#Handling // c.f. https://wiki.osdev.org/Paging#Handling
// error_code bit0: Present ? // error_code bit0: Present ?
// bit1: Trying to write ? // bit1: Trying to write ?
// bit2: User page try to access? // 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); printStringDetails("PAGE FAULT", RED, BLACK, 0, VGA_HEIGHT - 1);
printIntDetails(error_code, RED, BLACK, 11, VGA_HEIGHT - 1); printIntDetails(error_code, RED, BLACK, 11, VGA_HEIGHT - 1);
(void)faulting_address;
(void)frame; (void)frame;
(void)error_code; (void)error_code;
} }