Paging and heap rewrite

VESA drawing causes a Page fault because it tries to use a pointer to the framebuffer which was created before the paging has been initialized. If the resolution is set after the paging has been initialized the CPU throws a triple fault because the int32 call can not happen with paging turned on. To be fixed soon!

1 files changed, 4 insertions, 29 deletions

diff --git a/src/kernel/interact.asm b/src/kernel/interact.asm
index 8a3e91e..eaad82e 100644
--- a/src/kernel/interact.asm
+++ b/src/kernel/interact.asm
@@ -1,33 +1,5 @@
-;
-; Protected Mode BIOS Call Functionailty v2.0 - by Napalm
-; -------------------------------------------------------
-;
-; This is code shows how its POSSIBLE to execute BIOS interrupts
-; by switch out to real-mode and then back into protected mode.
-;
-; If you wish to use all or part of this code you must agree
-; to the license at the following URL.
-;
+; Protected Mode BIOS Call Functionality v2.0 - by Napalm
 ; License: http://creativecommons.org/licenses/by-sa/2.0/uk/
-;
-; Notes: This file is in NASM syntax.
-;        Turn off paging before calling these functions.
-;        int32() resets all selectors.
-;
-; C Prototype:
-;   void _cdelc int32(unsigned char intnum, regs16_t *regs);
-;
-; Example of usage:
-;   regs.ax = 0x0013;
-;   int32(0x10, &regs);
-;   memset((char *)0xA0000, 1, (320*200));
-;   memset((char *)0xA0000 + (100*320+80), 14, 80);
-;   regs.ax = 0x0000;
-;   int32(0x16, &regs);
-;   regs.ax = 0x0003;
-;   int32(0x10, &regs);
-;
-;
 [bits 32]
 
 global int32, _int32
@@ -60,6 +32,9 @@ endstruc
 
 section .text
    int32: use32                               ; by Napalm
+   mov edx, cr0
+   and edx, 0x7fffffff
+   mov cr0, edx
    _int32:
       cli                                    ; disable interrupts
       pusha                                  ; save register state to 32bit stack