4 files changed, 24 insertions, 3 deletions

diff --git a/Source/Kernel/SyscallManager/IDT.ns.cpp b/Source/Kernel/SyscallManager/IDT.ns.cpp
index f447e6f..042ef92 100644
--- a/Source/Kernel/SyscallManager/IDT.ns.cpp
+++ b/Source/Kernel/SyscallManager/IDT.ns.cpp
@@ -76,6 +76,7 @@ extern "C" void interrupt_handler(registers_t regs) {
 		doSwitch = doSwitch or Task::IRQwakeup(regs.int_no - 32);
 	}
 	if (regs.int_no == 64) {
+		asm volatile("sti");	//Make syscalls preemtible
 		u32int res = (regs.eax >> 8);
 		u8int wat = (regs.eax & 0xFF);
 		if (res == 0xFFFFFF) {
@@ -91,6 +92,7 @@ extern "C" void interrupt_handler(registers_t regs) {
 		}
 		//Some syscalls have maybee modified current page directory, set it back to one for current process
 		Task::currProcess()->getPagedir()->switchTo();
+		asm volatile("cli");
 	}
 	if (regs.int_no == 66) {	//This syscall signals to kernel that thread ended.
 		Task::currentThreadExits(regs.eax);	//DO NOT COUNT ON COMMING BACK FROM HERE
diff --git a/Source/Kernel/SyscallManager/Res.ns.cpp b/Source/Kernel/SyscallManager/Res.ns.cpp
index 048d17a..c554166 100644
--- a/Source/Kernel/SyscallManager/Res.ns.cpp
+++ b/Source/Kernel/SyscallManager/Res.ns.cpp
@@ -4,6 +4,7 @@
 #include <Process.iface.h>
 #include <Thread.iface.h>
 #include <FSNode.iface.h>
+#include <Sys.iface.h>
 #include <TaskManager/Task.ns.h>
 
 namespace Res {
@@ -20,6 +21,7 @@ static_call_t staticCalls[] = {
 	{PRIF_OBJTYPE, Process::scall},
 	{THIF_OBJTYPE, Thread::scall},
 	{FNIF_OBJTYPE, FSNode::scall},
+	{SYIF_IFID, Sys::scall},
 	{0, 0}
 };
 
@@ -67,7 +69,7 @@ u32int call(u32int ressource, u8int wat, u32int a, u32int b, u32int c, u32int d,
 		if (ressource > size or ressources[ressource] == 0) {
 			return (u32int) - 1;
 		} else {
-			return ressources[ressource]->doCall(wat, a, b, c, d, e);
+			return ressources[ressource]->call(wat, a, b, c, d, e);
 		}
 	}
 }
diff --git a/Source/Kernel/SyscallManager/Ressource.class.cpp b/Source/Kernel/SyscallManager/Ressource.class.cpp
index f2aaccb..8862bca 100644
--- a/Source/Kernel/SyscallManager/Ressource.class.cpp
+++ b/Source/Kernel/SyscallManager/Ressource.class.cpp
@@ -1,7 +1,8 @@
 #include "Ressource.class.h"
 #include <SyscallManager/Res.ns.h>
+#include <UserManager/Usr.ns.h>
 
-Ressource::Ressource(u8int type, call_t* callTable) {
+Ressource::Ressource(u8int type, call_t* callTable) : m_lock(MUTEX_FALSE) {
 	m_id = Res::registerRes(this);
 	m_type = type;
 	m_callTables = 0;
@@ -39,3 +40,11 @@ u32int Ressource::doCall(u8int id, u32int a, u32int b, u32int c, u32int d, u32in
 	}
 	return (u32int) - 1;
 }
+
+u32int Ressource::call(u8int id, u32int a, u32int b, u32int c, u32int d, u32int e) {
+	if (!ISROOT && !accessible()) return (u32int) - 1;
+	m_lock.waitLock();
+	u32int r = doCall(id, a, b, c, d, e);
+	m_lock.unlock();
+	return r;
+}
diff --git a/Source/Kernel/SyscallManager/Ressource.class.h b/Source/Kernel/SyscallManager/Ressource.class.h
index f58276b..2ccdcc1 100644
--- a/Source/Kernel/SyscallManager/Ressource.class.h
+++ b/Source/Kernel/SyscallManager/Ressource.class.h
@@ -2,6 +2,7 @@
 #define DEF_RESSOURCE_CLASS_H
 
 #include <SimpleList.class.h>
+#include <Mutex.class.h>
 
 class Ressource;
 
@@ -37,18 +38,25 @@ class Ressource {
 	Ressource(const Ressource&);
 	Ressource& operator=(const Ressource&);
 	
+	Mutex m_lock;
+
 	u32int m_id;
 	u32int m_type;
 	SimpleList<call_t*> *m_callTables;
 
+	u32int doCall(u8int id, u32int a, u32int b, u32int c, u32int d, u32int e);
+
 	protected:
 	Ressource(u8int type, call_t* callTable = 0);
 	~Ressource();
 
+	//This function's role is to tell the Ressource if it is supposed to be accesible from current user or not
+	virtual bool accessible() = 0;	//This function should be overloaded by all derivated classes
+
 	void addCallTable(call_t* callTable);
 
 	public:
-	u32int doCall(u8int id, u32int a, u32int b, u32int c, u32int d, u32int e);
+	u32int call(u8int id, u32int a, u32int b, u32int c, u32int d, u32int e);
 	u32int resId() { return m_id; }
 	u32int resType() { return m_type; }
 };