Unifying the Lunaix's Physical Memory Model (#28)

[lunaix-os.git] / lunaix-os / arch / i386 / boot / prologue.S

diff --git a/lunaix-os/arch/i386/boot/prologue.S b/lunaix-os/arch/i386/boot/prologue.S
index ff77ef591def5bb8ab39693a162d87197abde829..dc17242271d1cf1ee56c21443bca1f2fac00c3a1 100644 (file)
--- a/lunaix-os/arch/i386/boot/prologue.S
+++ b/lunaix-os/arch/i386/boot/prologue.S
@@ -2,6 +2,21 @@
 
 #define __ASM__
 #include <sys/abi.h>
 
 #define __ASM__
 #include <sys/abi.h>

+#include <sys/failsafe.h>
+
+.section .bss.kstack
+    .global __kinit_stack_end
+    
+    .align 16
+    __kinit_stack_end:
+        .skip 2048, 0
+    __kinit_stack_top:
+    # TODO 
+    # This stack was too small that corrupt the ambient kernel structures.
+    #  (took me days to figure this out!)
+    # We should spent more time to implement a good strategy to detect such
+    #  run-over (we can check these invariants when we trapped in some non-recoverable
+    #  state and provide good feedback to user)

 
 .section .text
     .global hhk_entry_
 
 .section .text
     .global hhk_entry_


@@ -9,12 +24,17 @@
         /*
             欢迎来到虚拟内存的世界！ :D
          */
         /*
             欢迎来到虚拟内存的世界！ :D
          */

+        movl $__kinit_stack_top, %esp

         andl $stack_alignment, %esp
         andl $stack_alignment, %esp

+
+        movl $__kinit_stack_end, %eax
+        movl $STACK_SANITY, (%eax)
+        movl $STACK_SANITY, 4(%eax)
+        movl $STACK_SANITY, 8(%eax)
+        movl $STACK_SANITY, 12(%eax)
+

         subl $16, %esp
         subl $16, %esp

-        /* 
-            最终还是决定将IDT&GDT的初始化和安装放在这里
-            注意：由于已开启分页，GDTR与IDTR里面放的不是物理地址，是线性地址！ 
-        */
+

         /* 
             加载 GDT 
             P.s. 虽然GDT在分页后已变得不重要，甚至可以忽略不作。但为了保持完整性，还是选择加载他
         /* 
             加载 GDT 
             P.s. 虽然GDT在分页后已变得不重要，甚至可以忽略不作。但为了保持完整性，还是选择加载他