dfhack/plugins/Dfusion/luafiles/onfunction/plugin.lua

42 lines
1.3 KiB
Lua

onfunction=onfunction or {}
function onfunction.install()
ModData=engine.installMod("dfusion/onfunction/functions.o","functions",4)
modpos=ModData.pos
modsize=ModData.size
onfunction.pos=modpos
trgpos=engine.getpushvalue()
print(string.format("Function installed in:%x function to call is: %x",modpos,trgpos))
local firstpos=modpos+engine.FindMarker(ModData,"function")
engine.poked(firstpos,trgpos-firstpos-4) --call Lua-Onfunction
onfunction.fpos=modpos+engine.FindMarker(ModData,"function3")
engine.poked(modpos+engine.FindMarker(ModData,"function2"),modpos+modsize)
engine.poked(onfunction.fpos,modpos+modsize)
SetExecute(modpos)
onfunction.calls={}
end
function OnFunction(values)
print("Onfunction called!")
print("Data:")
for k,v in pairs(values) do
print(string.format("%s=%x",k,v))
end
return onfunction.calls[values.ret] --returns real function to call
end
function onfunction.patch(addr)
if(engine.peekb(addr)~=0xe8) then
error("Incorrect address, not a function call")
else
onfunction.calls[addr+5]=addr+engine.peekd(addr+1)+5 --adds real function to call
engine.poked(addr+1,engine.getmod("functions")-addr-5)
end
end
mypos=engine.getmod("functions")
if mypos then
print("Onfunction already installed")
onfunction.patch(0x189dd6+offsets.base())
else
onfunction.install()
end