From bb2a6b4d93512e8afc1b1999eb58f1f506cc27ae Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 26 Jan 2020 18:38:36 +0100
Subject: Magic commit

Some things work, others don't.
---
 src/kernel/tasks/process.asm | 48 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 src/kernel/tasks/process.asm

(limited to 'src/kernel/tasks/process.asm')

diff --git a/src/kernel/tasks/process.asm b/src/kernel/tasks/process.asm
new file mode 100644
index 0000000..a46ac3d
--- /dev/null
+++ b/src/kernel/tasks/process.asm
@@ -0,0 +1,48 @@
+[GLOBAL read_eip]
+read_eip:
+    pop eax
+    jmp eax
+
+[GLOBAL copy_page_physical]
+copy_page_physical:
+    push ebx
+    pushf
+
+    cli
+
+    mov ebx, [esp+12]
+    mov ecx, [esp+16]
+
+    mov edx, cr0
+    and edx, 0x7fffffff
+    mov cr0, edx
+
+    mov edx, 1024
+
+.loop:
+    mov eax, [ebx]
+    mov [ecx], eax
+    add ebx, 4
+    add ecx, 4
+    dec edx
+    jnz .loop
+
+    mov edx, cr0
+    or  edx, 0x80000000
+    mov cr0, edx
+
+    popf
+    pop ebx
+    ret
+
+[GLOBAL perform_task_switch]
+perform_task_switch:
+     cli
+     mov ecx, [esp+4]
+     mov eax, [esp+8]
+     mov ebp, [esp+12]
+     mov esp, [esp+16]
+     mov cr3, eax
+     mov eax, 0x12345
+     sti
+     jmp ecx
\ No newline at end of file
-- 
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