Fixed a bug with paging/tasking.

4 files changed, 10 insertions, 4 deletions

diff --git a/Source/Kernel/SyscallManager/IDT.ns.h b/Source/Kernel/SyscallManager/IDT.ns.h
index e73a885..ea8372a 100644
--- a/Source/Kernel/SyscallManager/IDT.ns.h
+++ b/Source/Kernel/SyscallManager/IDT.ns.h
@@ -4,6 +4,7 @@
 #include <common.h>
 
 struct registers_t {
+	u32int cr3;		//Page directory
 	u32int ds;                  // Data segment selector
 	u32int edi, esi, ebp, esp, ebx, edx, ecx, eax; // Pushed by pusha.
 	u32int int_no, err_code;    // Interrupt number and error code (if applicable)
diff --git a/Source/Kernel/SyscallManager/IDT.wtf.asm b/Source/Kernel/SyscallManager/IDT.wtf.asm
index b94612e..630b2fb 100644
--- a/Source/Kernel/SyscallManager/IDT.wtf.asm
+++ b/Source/Kernel/SyscallManager/IDT.wtf.asm
@@ -116,8 +116,14 @@ interrupt_common_stub:
    mov fs, ax
    mov gs, ax
 
+   mov eax, cr3
+   push eax
+
    call interrupt_handler
 
+   pop eax
+   mov cr3, eax
+
    pop eax        ; reload the original data segment descriptor
    mov ds, ax
    mov es, ax
diff --git a/Source/Kernel/TaskManager/Task.ns.cpp b/Source/Kernel/TaskManager/Task.ns.cpp
index aef07f3..75f9c3d 100644
--- a/Source/Kernel/TaskManager/Task.ns.cpp
+++ b/Source/Kernel/TaskManager/Task.ns.cpp
@@ -70,7 +70,7 @@ SimpleList<Thread*> *nextThread() {
 void doSwitch() {
 	if (currentThread == NULL or currentProcess == NULL) return;
 
-	u32int esp, ebp, eip, cr3;
+	u32int esp, ebp, eip;
 
 	asm volatile("mov %%esp, %0" : "=r"(esp));
 	asm volatile("mov %%ebp, %0" : "=r"(ebp));
@@ -91,7 +91,6 @@ void doSwitch() {
 	esp = t->getEsp();
 	ebp = t->getEbp();
 	eip = t->getEip();
-	cr3 = currentProcess->getPagedir()->physicalAddr;
 
 	asm volatile("cli");
 
@@ -101,10 +100,9 @@ void doSwitch() {
 			mov %0, %%ebp;	\
 			mov %1, %%esp;	\
 			mov %2, %%ecx;	\
-			mov %3, %%cr3;	\
 			mov $0x12345, %%eax;	\
 			jmp *%%ecx;"
-		: : "r"(ebp), "r"(esp), "r"(eip), "r"(cr3));
+		: : "r"(ebp), "r"(esp), "r"(eip));
 }
 
 void triggerSwitch() {
diff --git a/Source/Kernel/TaskManager/Thread.class.cpp b/Source/Kernel/TaskManager/Thread.class.cpp
index 419a954..a9c53ed 100644
--- a/Source/Kernel/TaskManager/Thread.class.cpp
+++ b/Source/Kernel/TaskManager/Thread.class.cpp
@@ -18,6 +18,7 @@ u32int Thread::scall(u8int wat, u32int a, u32int b, u32int c, u32int d) {
 }
 
 void runThread(Thread* thread, void* data, thread_entry_t entry_point) {
+	thread->m_process->getPagedir()->switchTo();
 	if (thread->m_isKernel) {
 		asm volatile("sti");
 		u32int ret = entry_point(data);	//Run !