extern Uint GetEIP(); // start.asm
extern Uint32 gaInitPageDir[1024]; // start.asm
extern void Kernel_Stack_Top;
-extern volatile int giThreadListLock;
+extern tSpinlock glThreadListLock;
extern int giNumCPUs;
extern int giNextTID;
extern int giTotalTickets;
extern void Threads_Dump();
extern tThread *Threads_CloneTCB(Uint *Err, Uint Flags);
extern void Isr8(); // Double Fault
+extern void Proc_ReturnToUser();
// === PROTOTYPES ===
void ArchThreads_Init();
void Proc_ChangeStack();
int Proc_Clone(Uint *Err, Uint Flags);
void Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP);
+void Proc_CallFaultHandler(tThread *Thread);
void Proc_Scheduler();
// === GLOBALS ===
return 0;
}
+/**
+ * \brief Calls a signal handler in user mode
+ * \note Used for signals
+ */
+void Proc_CallFaultHandler(tThread *Thread)
+{
+ // Rewinds the stack and calls the user function
+ // Never returns
+ __asm__ __volatile__ ("mov %0, %%ebp;\n\tcall Proc_ReturnToUser" :: "r"(Thread->FaultHandler));
+ for(;;);
+}
+
/**
* \fn void Proc_Scheduler(int CPU)
* \brief Swap current thread and clears dead threads
tThread *thread;
// If the spinlock is set, let it complete
- if(giThreadListLock) return;
+ if(IS_LOCKED(&glThreadListLock)) return;
// Clear Delete Queue
while(gDeleteThreads)
#else
__asm__ __volatile__ ("mov %0, %%cr3"::"a"(thread->MemState.CR3));
#endif
+
+ #if 0
+ if(thread->SavedState.ESP > 0xC0000000
+ && thread->SavedState.ESP < thread->KernelStack-0x2000) {
+ Log_Warning("Proc", "Possible bad ESP %p (PID %i)", thread->SavedState.ESP);
+ }
+ #endif
+
// Switch threads
__asm__ __volatile__ (
"mov %1, %%esp\n\t" // Restore ESP