cpu: properly reload segment registers after lgdt

2020-09-19 17:18:39 +03:00
parent 5f7b6e2cee
commit f9eb40dbfb
1 changed files with 22 additions and 2 deletions
@@ -2,7 +2,27 @@
 .global amd64_gdt_load
 amd64_gdt_load:
    lgdt (%rdi)
-    // Not sure if CS reload is needed
    movw $0x28, %ax
    ltr %ax
-    retq
+
+    mov %rsp, %rdx
+    mov $0x10, %rax
+    push %rax
+    push %rdx
+
+    pushf
+
+    mov $0x08, %rax
+    push %rax
+    lea 1f(%rip), %rax
+    push %rax
+
+    iretq
+
+1:
+    mov $0x10, %rax
+    mov %rax, %ds
+    mov %rax, %es
+    mov %rax, %fs
+    mov %rax, %gs
+    ret