From 205950e9744a2d77526a6eba108e51f5543b6c89 Mon Sep 17 00:00:00 2001
From: pjht <terppa05@gmail.com>
Date: Sun, 10 Feb 2019 15:04:54 -0600
Subject: [PATCH] Add page fault debug messages

---
 cpu/i386/isr.c | 40 ++++++++++++++++++++++------------------
 1 file changed, 22 insertions(+), 18 deletions(-)

diff --git a/cpu/i386/isr.c b/cpu/i386/isr.c
index a139ebe..1ef55bb 100644
--- a/cpu/i386/isr.c
+++ b/cpu/i386/isr.c
@@ -122,24 +122,28 @@ void isr_handler(registers_t r) {
     case 14: {
       uint32_t addr;
       asm("movl %%cr2,%0": "=r"(addr));
-      vga_write_string("FAULT\n");
-      // if (r.err_code==0) {
-      //   klog("PANIC","Kernel process tried to read a non-present page entry at address %x",addr);
-      // } else if (r.err_code==1) {
-      //   klog("PANIC","Kernel process tried to read a page and caused a protection fault at address %x",addr);
-      // } else if (r.err_code==2) {
-      //   klog("PANIC","Kernel process tried to write to a non-present page entry at address %x",addr);
-      // } else if (r.err_code==3) {
-      //   klog("PANIC","Kernel process tried to write a page and caused a protection fault at address %x",addr);
-      // } else if (r.err_code==4) {
-      //   klog("PANIC","User process tried to read a non-present page entry at address %x",addr);
-      // } else if (r.err_code==5) {
-      //   klog("PANIC","User process tried to read a page and caused a protection fault at address %x",addr);
-      // } else if (r.err_code==6) {
-      //   klog("PANIC","User process tried to write to a non-present page entry at address %x",addr);
-      // } else if (r.err_code==7) {
-      //   klog("PANIC","User process tried to write a page and caused a protection fault at address %x",addr);
-      // }
+      if (r.err_code==0) {
+        vga_write_string("Kernel process tried to read a non-present page entry at address ");
+      } else if (r.err_code==1) {
+        vga_write_string("Kernel process tried to read a page and caused a protection fault at address ");
+      } else if (r.err_code==2) {
+        vga_write_string("Kernel process tried to write to a non-present page entry at address ");
+      } else if (r.err_code==3) {
+        vga_write_string("Kernel process tried to write a page and caused a protection fault at address ");
+      } else if (r.err_code==4) {
+        vga_write_string("User process tried to read a non-present page entry at address ");
+      } else if (r.err_code==5) {
+        vga_write_string("User process tried to read a page and caused a protection fault at address ");
+      } else if (r.err_code==6) {
+        vga_write_string("User process tried to write to a non-present page entry at address ");
+      } else if (r.err_code==7) {
+        vga_write_string("User process tried to write a page and caused a protection fault at address ");
+      }
+      char str[11];
+      str[0]='\0';
+      hex_to_ascii(addr,str);
+      vga_write_string(str);
+      vga_write_string("\n");
       // if ((r.err_code&1)==0) {
       //   // int dir_entry=(addr&0xFFC00000)>>22;
       //   // int table_entry=(addr&0x3FF000)>12;