refactor: decouple i386 specific instruction invocation

[lunaix-os.git] / lunaix-os / kernel / asm / x86 / pfault.c

diff --git a/lunaix-os/kernel/asm/x86/pfault.c b/lunaix-os/kernel/asm/x86/pfault.c
deleted file mode 100644 (file)
index c16385a..0000000
--- a/lunaix-os/kernel/asm/x86/pfault.c
+++ /dev/null
@@ -1,66 +0,0 @@
-#include <arch/x86/interrupts.h>
-#include <lunaix/mm/pmm.h>
-#include <lunaix/mm/mm.h>
-#include <lunaix/mm/region.h>
-#include <lunaix/mm/vmm.h>
-#include <lunaix/common.h>
-#include <lunaix/syslog.h>
-#include <lunaix/status.h>
-#include <lunaix/sched.h>
-
-static void kprintf(const char* fmt, ...) { va_list args; va_start(args, fmt); __kprintf("PFAULT", fmt, args); va_end(args); }
-
-extern void __print_panic_msg(const char* msg, const isr_param* param);
-
-void
-intr_routine_page_fault (const isr_param* param) 
-{
-    uintptr_t ptr = cpu_rcr2();
-    if (!ptr) {
-        goto segv_term;
-    }
-
-    struct mm_region* hit_region = region_get(__current, ptr);
-
-    if (!hit_region) {
-        // Into the void...
-        goto segv_term;
-    }
-
-    // if (param->eip == ptr && !(hit_region->attr & REGION_EXEC)) {
-    //     goto segv_term;
-    // }
-
-    x86_pte_t* pte = CURPROC_PTE(ptr >> 12);
-    if (*pte & PG_PRESENT) {
-        if ((hit_region->attr & REGION_PERM_MASK) == (REGION_RSHARED | REGION_READ)) {
-            // normal page fault, do COW
-                uintptr_t pa = (uintptr_t)vmm_dup_page(__current->pid, PG_ENTRY_ADDR(*pte));
-                pmm_free_page(__current->pid, *pte & ~0xFFF);
-                *pte = (*pte & 0xFFF) | pa | PG_WRITE;
-                return;
-        }
-        // impossible cases or accessing privileged page
-        goto segv_term;
-    }
-
-    if (!(*pte)) {
-        // Invalid location
-        goto segv_term;
-    }
-    uintptr_t loc = *pte & ~0xfff;
-    // a writable page, not present, pte attr is not null and no indication of cached page -> a new page need to be alloc
-    if ((hit_region->attr & REGION_WRITE) && (*pte & 0xfff) && !loc) {
-        uintptr_t pa = pmm_alloc_page(__current->pid, 0);
-        *pte = *pte | pa | PG_PRESENT;
-        return;
-    }
-    // page not present, bring it from disk or somewhere else
-    __print_panic_msg("WIP page fault route", param);
-    while (1);
-
-segv_term:
-    kprintf(KERROR "(pid: %d) Segmentation fault on %p (%p:%p)\n", __current->pid, ptr, param->cs, param->eip);
-    terminate_proc(LXSEGFAULT);
-    // should not reach
-}
\ No newline at end of file