From 73ece9d19e56ac2b53587702e84c903967baa352 Mon Sep 17 00:00:00 2001 From: "E. Almqvist" Date: Sat, 27 Nov 2021 16:31:10 +0100 Subject: [PATCH] Non-distructive assembly stuff --- kernel/enable_paging.asm | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/enable_paging.asm b/kernel/enable_paging.asm index 5a24d15..9a12923 100644 --- a/kernel/enable_paging.asm +++ b/kernel/enable_paging.asm @@ -5,6 +5,7 @@ PAGE_DIRECTORY_ADDR equ 0xffffffff ; TODO: change me to something good global enable_paging_registers ; make the SR "global" so that we can access it in the kernel etc enable_paging_registers: + push eax mov eax, PAGE_DIRECTORY_ADDR ; Move the address of the ; page register (page directory) into eax ; (Using eax as a middle-man register) @@ -14,10 +15,9 @@ enable_paging_registers: or eax, PAGING_ENABLE_FLAG ; perform the OR operation on eax (ex: 0b01 or 0b10 = 0b11) ; This is needed to enable paging (set the flag as "enabled") - ; DANGER: past this op memory will get weird - ; mov cr0, eax ; Move it into cr0 to finally enable paging - ; TODO: Make this work to prevent kernel "panic" (actually death) -> bootloop + mov cr0, eax ; Move it into cr0 to finally enable paging + pop eax ret ; return to last location