gdt: add ring3 code and data segments

2025-04-06 17:13:48 +03:00
parent 2e2b7c7612
commit 86cb117509
1 changed files with 18 additions and 0 deletions
@@ -19,6 +19,22 @@ gdt_data:
  db 11001111b ; 48-55 limit (48-51) and flags (52-55)
  db 0         ; 56-63 base

+gdt_code_ring3:
+  dw 0xffff
+  dw 0
+  db 0
+  db 11111010b
+  db 11001111b
+  db 0
+
+gdt_data_ring3:
+  dw 0xffff
+  dw 0
+  db 0
+  db 11110010b
+  db 11001111b
+  db 0
+
 gdt_end:


@@ -28,3 +44,5 @@ gdt:

 CODE_SEG equ gdt_code - gdt_start
 DATA_SEG equ gdt_data - gdt_start
+CODE_SEG_RING3 equ gdt_code_ring3 - gdt_start  ; 24
+DATA_SEG_RING3 equ gdt_data_ring3 - gdt_start  ; 32