add ULOS loader

mods/loader_ulos.lua

@@ -0,0 +1,35 @@
+-- ULOS loader --
+local zy = krequire("zorya")
+local utils = krequire("utils")
+local thd = krequire("thd")
+local vdev = krequire("util_vcomponent")
+local function proxytable(t)
+	return setmetatable({}, {__index=function(self, i)
+		if (type(t[i]) == "table") then
+			self[i] = proxytable(t[i])
+			return rawget(self, i)
+		else
+			return t[i]
+		end
+	end})
+end
+local ulos_count = 0
+return function(addr)
+	local fs = component.proxy(addr)
+	thd.add("ulos$"..ulos_count, function()
+		local env = utils.make_env()
+		function env.computer.getBootAddress()
+			return addr
+		end
+		function env.computer.setBootAddress()end
+		local old_dl = utils.debug_log
+		load(utils.readfile(fs.address, fs.open("/boot/cynosure.lua")), "=/boot/cynosure.lua", "t", env)()
+		computer.pushSignal("ulos_dead")
+	end)
+	while true do
+		if computer.pullSignal() == "ulos_dead" then
+			utils.debug_log("Got signal.")
+			break
+		end
+	end
+end