X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/0264889df8dd6775d765416a13804bc4ed8cc3f7..fedfd71f5492177a7c7d7fd2bd1529a832106395:/lunaix-os/arch/x86/boot.S

diff --git a/lunaix-os/arch/x86/boot.S b/lunaix-os/arch/x86/boot.S
index 29746ee..1eddb52 100644
--- a/lunaix-os/arch/x86/boot.S
+++ b/lunaix-os/arch/x86/boot.S
@@ -14,7 +14,9 @@
 
 .section .text
     .global start_
-    .type start_, @function
+    .type start_, @function     /* Optional, this just give the 
+                                 * linker more knowledge about the label 
+                                 */
     start_:
         movl $stack_top, %esp
         /* 
@@ -24,7 +26,26 @@
                 3. Enable paging
         */
         call _kernel_init
+        
+        subl $0x6, %esp
+        movl $_gdt, 2(%esp)
+        movw _gdt_limit, %ax
+        movw %ax, (%esp)
+        lgdt (%esp)
+        addl $0x6, %esp
 
+        movw $0x10, %cx
+        movw %cx, %es
+        movw %cx, %ds
+        movw %cx, %fs
+        movw %cx, %gs
+        movw %cx, %ss
+
+        pushw $0x08
+        pushl $_after_gdt
+        retf
+
+    _after_gdt:
         pushl %ebx
         call _kernel_main