Kernel/armv7 - Debugging, fixed TLB issues with a HACK!

[tpg/acess2.git] / Kernel / arch / x86 / proc.asm

diff --git a/Kernel/arch/x86/proc.asm b/Kernel/arch/x86/proc.asm
index 74a25d4..014cfed 100644 (file)
--- a/Kernel/arch/x86/proc.asm
+++ b/Kernel/arch/x86/proc.asm
@@ -55,11 +55,14 @@ SwitchTasks:
        
        ; Old IP
        mov eax, [esp+0x20+16]
+       test eax, eax
+       jz .nosave
        mov DWORD [eax], .restore
        ; Old SP
        mov eax, [esp+0x20+8]
        mov [eax], esp
 
+.nosave:
        mov ecx, [esp+0x20+12]  ; New IP
        mov eax, [esp+0x20+20]  ; New CR3
        mov esp, [esp+0x20+ 4]  ; New SP
@@ -376,4 +379,4 @@ User_Syscall_Exit:
        mov ebx, [esp+4]
        int 0xAC
 
-; vim: ft=nasm, ts=8
+; vim: ft=nasm ts=8