Functions for reading/writing some special registers

2018-02-13 12:47:50 +01:00
parent 96d2ebd977
commit c1c3842ace
5 changed files with 37 additions and 9 deletions
--- a/src/kernel/cpu/registers.S
+++ b/src/kernel/cpu/registers.S
@@ -0,0 +1,23 @@
+.intel_syntax noprefix
+
+.global load_idt
+load_idt:
+  lidt [rdi]
+  ret
+
+.global read_cr0
+read_cr0:
+  mov rax, cr0
+  ret
+.global read_cr2
+read_cr2:
+  mov rax, cr2
+  ret
+.global read_cr3
+read_cr3:
+  mov rax, cr3
+  ret
+.global read_cr4
+read_cr4:
+  mov rax, cr4
+  ret