sch: Make sch_invoke return back to kernel

include/menix/system/sch/scheduler.h

@@ -18,7 +18,7 @@ void sch_init(BootInfo* info);
 
 // Makes the scheduler act immediately instead of waiting for a timer.
 // ? Defined per architecture.
-ATTR(noreturn) void sch_invoke();
+void sch_invoke();
 
 // Saves the architecture dependent data of the `thread`.
 // ? Defined per architecture.

kernel/arch/x86_64/sch/core.c

@@ -5,14 +5,12 @@
 
 #include <apic.h>
 
-ATTR(noreturn) void sch_invoke()
+void sch_invoke()
 {
 	asm_interrupt_enable();
 
 	// Force a software interrupt.
 	asm_int(INT_TIMER);
-
-	__builtin_unreachable();
 }
 
 void sch_arch_save(Cpu* core, Thread* thread)

kernel/arch/x86_64/system/interrupts.c

@@ -101,13 +101,12 @@ void interrupt_register(usize idx, InterruptFn handler)
 	asm_interrupt_enable();
 }
 
-void interrupt_handler(Context* regs)
+Context* interrupt_handler(Context* regs)
 {
 	// If we have a handler for this interrupt, call it.
 	if (regs->isr < ARRAY_SIZE(exception_handlers) && exception_handlers[regs->isr])
 	{
-		exception_handlers[regs->isr](regs);
-		return;
+		return exception_handlers[regs->isr](regs);
 	}
 
 	// If unhandled and caused by the user, terminate the process with SIGILL.
@@ -118,7 +117,7 @@ void interrupt_handler(Context* regs)
 		arch_dump_registers(regs);
 
 		proc_kill(proc, true);
-		return;
+		return regs;
 	}
 
 	// Disable spinlocks so we have a chance of displaying a message.

kernel/system/sch/core.c

@@ -242,7 +242,7 @@ Context* sch_reschedule(Context* context)
 	}
 
 	// Grab the next thread.
-	running = sch_next(running);
+	running = sch_next(thread_list);
 
 	// If there are no more threads to run, something went wrong.
 	if (running == NULL)

kernel/system/sch/proc.c

@@ -142,8 +142,7 @@ bool proc_execve(const char* name, const char* path, char** argv, char** envp, b
 	vm_set_page_map(map);
 	spin_free(&proc_lock);
 
-	// Run the scheduler.
-	sch_invoke();
+	return true;
 }
 
 usize proc_fork(Process* proc, Thread* thread)