x86_64: pmap: enable kernel-mode write-protection

2026-04-01 18:06:50 +01:00
parent 8b41f5e681
commit 15c2207ab9
3 changed files with 17 additions and 2 deletions
@@ -24,12 +24,13 @@ gigabyte_pages:
 1:	mov $0x1, %rax
 	jmp 3f

-2:	mov $0x0, %rax	
+2:	mov $0x0, %rax

 3:	pop %rbx
 	pop %rbp
 	ret

+
 	.global enable_nx
 	.type enable_nx, @function

@@ -40,3 +41,14 @@ enable_nx:
 	wrmsr

 	ret
+
+
+	.global enable_wp
+	.type enable_wp, @function
+
+enable_wp:
+	mov %cr0, %rax
+	or $0x10000, %rax
+	mov %rax, %cr0
+
+	ret