diff options
Diffstat (limited to 'arch/x86_64/memory')
| -rw-r--r-- | arch/x86_64/memory/pml4.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86_64/memory/pml4.c b/arch/x86_64/memory/pml4.c index d5fb56b..b42ce06 100644 --- a/arch/x86_64/memory/pml4.c +++ b/arch/x86_64/memory/pml4.c @@ -1,5 +1,6 @@ #include "arch/x86_64/page.h" #include "arch/x86_64/processor.h" +#include "arch/x86_64/idt.h" #include "device/processor.h" #include "memory.h" #include "boot.h" @@ -7,6 +8,7 @@ #include "init.h" #include "string.h" #include "jove.h" +#include "print.h" #include "api/error.h" #include <stdint.h> @@ -81,6 +83,27 @@ pml4_try_map(pmle_t *pml4, uintptr_t pptr, uintptr_t vptr) return KE_OK; } +static void +s_handle_pagefault(ivt_state_t *state) +{ + int eflags = state->err; + bool e_present = eflags & 1; + bool e_write = (eflags & 2) > 0; + bool e_user = (eflags & 4) > 0; + bool e_insf = (eflags & 16) > 0; + + uintptr_t faultaddr; + __asm__ volatile("movq %%cr2, %0": "=r"(faultaddr)); + + kprintf("\n%s %s %s page for %s\n", + e_user ? "User" : "Kernel", + e_write ? "wrote to" : "read from", + e_present ? "present" : "non-present", + e_insf ? "instruction" : "memory"); + kprintf("Faulting address: %p\n", faultaddr); + kpanic_state(state, "Unhandled page fault"); +} + __attribute__((aligned(0x1000))) pmle_t s_kernel_pml4[512]; // Page L4 __attribute__((aligned(0x1000))) pmle_t s_kernel_pml3[512]; // Page L3 __attribute__((aligned(0x1000))) pmle_t s_kernel_pml2[512]; // Page directory @@ -139,6 +162,7 @@ pml4_setup_init(void) } __asm__ volatile("mov %0, %%cr3":: "r"(kernel_pml4_base)); + kernel_isr_handles[EXCEPTION_PF] = s_handle_pagefault; //Add page mapping object to init directory. _initDirectory.entries[INIT_OBJECT_PAGEMAP] = (objdir_entry_t) { |