mirror of
https://github.com/holub/mame
synced 2025-06-14 08:26:57 +03:00
552 lines
16 KiB
Lua
552 lines
16 KiB
Lua
-- license:BSD-3-Clause
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-- copyright-holders:Carl
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-- This includes a library of functions to be used at the Lua console as cf.getspaces() etc...
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local exports = {}
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exports.name = "cheatfind"
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exports.version = "0.0.1"
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exports.description = "Cheat finder helper library"
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exports.license = "The BSD 3-Clause License"
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exports.author = { name = "Carl" }
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local cheatfind = exports
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function cheatfind.startplugin()
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local cheat = {}
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-- return table of devices and spaces
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function cheat.getspaces()
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local spaces = {}
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for tag, device in pairs(manager:machine().devices) do
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if device.spaces then
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spaces[tag] = {}
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for name, space in pairs(device.spaces) do
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spaces[tag][name] = space
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end
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end
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end
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return spaces
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end
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-- return table of ram devices
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function cheat.getram()
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local ram = {}
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for tag, device in pairs(manager:machine().devices) do
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if device:shortname() == "ram" then
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ram[tag] = {}
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ram[tag].dev = device
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ram[tag].size = emu.item(device.items["0/m_size"]):read(0)
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end
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end
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return ram
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end
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-- save data block
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function cheat.save(space, start, size)
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local data = { block = "", start = start, size = size, space = space }
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if space.shortname then
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if space:shortname() == "ram" then
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data.block = emu.item(space.items["0/m_pointer"]):read_block(start, size)
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if not data.block then
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return nil
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end
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end
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else
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local block = ""
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local temp = {}
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local j = 1
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for i = start, start + size do
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if j < 65536 then
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temp[j] = string.pack("B", space:read_u8(i))
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j = j + 1
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else
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block = block .. table.concat(temp) .. string.pack("B", space:read_u8(i))
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temp = {}
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j = 1
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end
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end
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block = block .. table.concat(temp)
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data.block = block
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end
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return data
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end
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-- compare two data blocks, format is as lua string.unpack, bne and beq val is table of masks
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function cheat.comp(olddata, newdata, oper, format, val, bcd)
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local ret = {}
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local ref = {} -- this is a helper for comparing two match lists
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local bitmask = nil
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local function bne(a, b, val, addr)
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if type(val) ~= "table" then
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bitmask = a ~ b
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return bitmask ~= 0
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elseif not val[addr] then
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return false
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else
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bitmask = (a ~ b) & val[addr]
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return bitmask ~= 0
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end
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end
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local function beq(a, b, val, addr)
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if type(val) ~= "table" then
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bitmask = ~a ~ b
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return bitmask ~= 0
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elseif not val[addr] then
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return false
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else
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bitmask = (~a ~ b) & val[addr]
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return bitmask ~= 0
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end
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end
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local cfoper = {
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lt = function(a, b, val) return (a < b and val == 0) or (val > 0 and (a + val) == b) end,
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gt = function(a, b, val) return (a > b and val == 0) or (val > 0 and (a - val) == b) end,
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eq = function(a, b, val) return a == b end,
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ne = function(a, b, val) return (a ~= b and val == 0) or
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(val > 0 and ((a - val) == b or (a + val) == b)) end,
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bne = bne, beq = beq }
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local function check_bcd(val)
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local a = val + 0x0666666666666666
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a = a ~ val
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return (a & 0x1111111111111110) == 0
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end
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local function frombcd(val)
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local result = 0
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local mul = 1
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while val ~= 0 do
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result = result + ((val % 16) * mul)
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val = val >> 4
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mul = mul * 10
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end
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return result
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end
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if olddata.start ~= newdata.start or olddata.size ~= newdata.size or not cfoper[oper] then
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return {}
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end
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if not val then
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val = 0
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end
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for i = 1, olddata.size do
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local old = string.unpack(format, olddata.block, i)
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local new = string.unpack(format, newdata.block, i)
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local oldc, newc = old, new
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local comp = false
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local addr = olddata.start + i - 1
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if not bcd or (check_bcd(old) and check_bcd(new)) then
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if bcd then
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oldc = frombcd(old)
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newc = frombcd(new)
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end
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if cfoper[oper](oldc, newc, val, addr) then
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ret[#ret + 1] = { addr = addr,
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oldval = old,
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newval = new,
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bitmask = bitmask }
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ref[ret[#ret].addr] = #ret
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end
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end
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end
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return ret, ref
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end
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local function check_val(oper, val, matches)
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if oper ~= "beq" and oper ~= "bne" then
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return val
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elseif not matches or not matches[1].bitmask then
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return nil
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end
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local masks = {}
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for num, match in pairs(matches) do
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masks[match.addr] = match.bitmask
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end
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return masks
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end
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-- compare two blocks and filter by table of previous matches
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function cheat.compnext(olddata, newdata, oldmatch, oper, format, val, bcd)
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local matches, refs = cheat.comp(olddata, newdata, oper, format, check_val(oper, val, oldmatch), bcd)
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local nonmatch = {}
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local oldrefs = {}
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for num, match in pairs(oldmatch) do
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oldrefs[match.addr] = num
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end
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for addr, ref in pairs(refs) do
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if not oldrefs[addr] then
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nonmatch[ref] = true
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refs[addr] = nil
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else
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matches[ref].oldval = oldmatch[oldrefs[addr]].oldval
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end
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end
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local resort = {}
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for num, match in pairs(matches) do
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if not nonmatch[num] then
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resort[#resort + 1] = match
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end
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end
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return resort
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end
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-- compare a data block to the current state
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function cheat.compcur(olddata, oper, format, val, bcd)
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local newdata = cheat.save(olddata.space, olddata.start, olddata.size, olddata.space)
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return cheat.comp(olddata, newdata, oper, format, val, bcd)
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end
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-- compare a data block to the current state and filter
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function cheat.compcurnext(olddata, oldmatch, oper, format, val, bcd)
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local newdata = cheat.save(olddata.space, olddata.start, olddata.size, olddata.space)
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return cheat.compnext(olddata, newdata, oldmatch, oper, format, val, bcd)
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end
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_G.cf = cheat
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local devtable = {}
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local devsel = 1
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local devcur = 1
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local formtable = { "B", "b", "<H", ">H", "<h", ">h", "<L", ">L", "<l", ">l", "<J", ">J", "<j", ">j" }
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local formname = { "u8", "s8", "little u16", "big u16", "little s16", "big s16",
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"little u32", "big u32", "little s32", "big s32", "little u64", "big u64", "little s64", "big s64" }
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local width = 1
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local bcd = 0
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local optable = { "lt", "gt", "eq", "ne", "beq", "bne" }
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local opsel = 1
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local value = 0
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local leftop = 1
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local rightop = 0
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local matches = {}
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local matchsel = 1
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local menu_blocks = {}
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local midx = { region = 1, init = 2, lop = 4, op = 5, rop = 6, val = 7,
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width = 9, bcd = 10, undo = 11, save = 12, comp = 13, match = 15, watch = 0 }
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local watches = {}
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local function start()
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devtable = {}
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devsel = 1
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devcur = 1
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width = 1
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bcd = 0
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opsel = 1
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value = 0
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leftop = 1
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rightop = 1
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matches = {}
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matchsel = 1
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menu_blocks = {}
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watches = {}
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local space_table = cheat.getspaces()
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for tag, list in pairs(space_table) do
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if list.program then
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local ram = {}
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for num, entry in pairs(list.program.map) do
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if entry.writetype == "ram" then
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ram[#ram + 1] = { offset = entry.offset, size = entry.endoff - entry.offset }
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end
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end
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if next(ram) then
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if tag == ":maincpu" then
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table.insert(devtable, 1, { tag = tag, space = list.program, ram = ram })
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else
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devtable[#devtable + 1] = { tag = tag, space = list.program, ram = ram }
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end
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end
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end
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end
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space_table = cheat.getram()
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for tag, ram in pairs(space_table) do
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devtable[#devtable + 1] = { tag = tag, space = ram.dev, ram = {{ offset = 0, size = ram.size }} }
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end
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end
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emu.register_start(start)
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local function menu_populate()
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local menu = {}
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local function menu_lim(val, min, max, menuitem)
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if val == min then
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menuitem[3] = "r"
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elseif val == max then
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menuitem[3] = "l"
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else
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menuitem[3] = "lr"
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end
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end
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menu[midx.region] = { "CPU or RAM", devtable[devsel].tag, 0 }
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if #devtable == 1 then
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menu[midx.region][3] = 0
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else
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menu_lim(devsel, 1, #devtable, menu[midx.region])
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end
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menu[midx.init] = { "Start new search", "", 0 }
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if #menu_blocks ~= 0 then
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menu[midx.init + 1] = { "---", "", "off" }
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menu[midx.lop] = { "Left operand", leftop, "" }
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menu_lim(leftop, 1, #menu_blocks[1] + 1, menu[midx.lop])
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if leftop == #menu_blocks[1] + 1 then
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menu[midx.lop][2] = "All"
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end
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menu[midx.op] = { "Operator", optable[opsel], "" }
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menu_lim(opsel, 1, #optable, menu[midx.op])
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menu[midx.rop] = { "Right operand", rightop, "" }
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menu_lim(rightop, 1, #menu_blocks[1] + 1, menu[midx.rop])
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if rightop == #menu_blocks[1] + 1 then
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menu[midx.rop][2] = "Current"
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end
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menu[midx.val] = { "Value", value, "" }
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menu_lim(value, 0, 100, menu[midx.val]) -- max value?
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if value == 0 then
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menu[midx.val][2] = "Any"
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end
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menu[midx.val + 1] = { "---", "", "off" }
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menu[midx.width] = { "Data Format", formname[width], 0 }
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menu_lim(width, 1, #formtable, menu[midx.width])
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menu[midx.bcd] = { "BCD", "Off", 0 }
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menu_lim(bcd, 0, 1, menu[midx.bcd])
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if bcd == 1 then
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menu[midx.bcd][2] = "On"
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end
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menu[midx.undo] = { "Undo last search -- #" .. #matches, "", 0 }
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menu[midx.save] = { "Save current -- #" .. #menu_blocks[1] + 1, "", 0 }
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menu[midx.comp] = { "Compare", "", 0 }
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if #matches ~= 0 then
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menu[midx.comp + 1] = { "---", "", "off" }
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menu[midx.match] = { "Match block", matchsel, "" }
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if #matches[#matches] == 1 then
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menu[midx.match][3] = 0
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else
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menu_lim(matchsel, 1, #matches[#matches], menu[midx.match])
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end
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for num2, match in ipairs(matches[#matches][matchsel]) do
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if #menu > 50 then
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break
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end
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local numform = ""
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local bitwidth = formtable[width]:sub(2, 2):lower()
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if bitwidth == "h" then
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numform = " %04x"
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elseif bitwidth == "l" then
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numform = " %08x"
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elseif bitwidth == "j" then
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numform = " %016x"
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else
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numform = " %02x"
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end
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menu[#menu + 1] = { string.format("%08x" .. numform .. numform, match.addr, match.oldval,
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match.newval), "", 0 }
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if not match.mode then
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match.mode = 1
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end
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if match.mode == 1 then
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menu[#menu][2] = "Test"
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elseif match.mode == 2 then
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menu[#menu][2] = "Write"
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else
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menu[#menu][2] = "Watch"
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end
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menu_lim(match.mode, 1, 3, menu[#menu])
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end
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end
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if #watches ~= 0 then
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menu[#menu + 1] = { "Clear Watches", "", 0 }
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midx.watch = #menu
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end
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end
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return menu
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end
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local function menu_callback(index, event)
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local ret = false
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local function incdec(val, min, max)
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if event == "left" and val ~= min then
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val = val - 1
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ret = true
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elseif event == "right" and val ~= max then
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val = val + 1
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ret = true
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end
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return val
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end
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if index == midx.region then
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if (event == "left" or event == "right") and #menu_blocks ~= 0 then
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manager:machine():popmessage("Changes to this only take effect when \"Start new search\" is selected")
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end
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devsel = incdec(devsel, 1, #devtable)
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return true
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elseif index == midx.init then
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if event == "select" then
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menu_blocks = {}
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matches = {}
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for num, region in ipairs(devtable[devcur].ram) do
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menu_blocks[num] = {}
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menu_blocks[num][1] = cheat.save(devtable[devcur].space, region.offset, region.size)
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end
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manager:machine():popmessage("Data cleared and current state saved")
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watches = {}
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leftop = 1
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rightop = 2
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ret = true
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end
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devcur = devsel
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elseif index == midx.undo then
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if event == "select" and #matches > 0 then
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matches[#matches] = nil
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end
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ret = true
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elseif index == midx.save then
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if event == "select" then
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for num, region in ipairs(devtable[devcur].ram) do
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menu_blocks[num][#menu_blocks[num] + 1] = cheat.save(devtable[devcur].space, region.offset, region.size)
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end
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manager:machine():popmessage("Current state saved")
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ret = true
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end
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elseif index == midx.op then
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opsel = incdec(opsel, 1, #optable)
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if event == "left" or event == "right" or event == "comment" then
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if optable[opsel] == "lt" then
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manager:machine():popmessage("Left less than right, value is difference")
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elseif optable[opsel] == "gt" then
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manager:machine():popmessage("Left greater than right, value is difference")
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elseif optable[opsel] == "eq" then
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manager:machine():popmessage("Left equal to right, value is ignored")
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elseif optable[opsel] == "ne" then
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manager:machine():popmessage("Left not equal to right, value is difference")
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elseif optable[opsel] == "beq" then
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manager:machine():popmessage("Left equal to right with bitmask, value is ignored")
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elseif optable[opsel] == "bne" then
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manager:machine():popmessage("Left not equal to right with bitmask, value is ignored")
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end
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end
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elseif index == midx.val then
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value = incdec(value, 0, 100)
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elseif index == midx.lop then
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leftop = incdec(leftop, 1, #menu_blocks[1])
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elseif index == midx.rop then
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rightop = incdec(rightop, 1, #menu_blocks[1] + 1)
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elseif index == midx.width then
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width = incdec(width, 1, #formtable)
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elseif index == midx.bcd then
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bcd = incdec(bcd, 0, 1)
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elseif index == midx.comp then
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if event == "select" then
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if #matches == 0 then
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matches[1] = {}
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for num = 1, #menu_blocks do
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if rightop == #menu_blocks[1] + 1 then
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matches[1][num] = cheat.compcur(menu_blocks[num][leftop], optable[opsel],
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formtable[width], value, bcd == 1)
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else
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matches[1][num] = cheat.comp(menu_blocks[num][leftop], menu_blocks[num][rightop],
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optable[opsel], formtable[width], value, bcd == 1)
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end
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end
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else
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lastmatch = matches[#matches]
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matches[#matches + 1] = {}
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for num = 1, #menu_blocks do
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if rightop == #menu_blocks[1] + 1 then
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matches[#matches][num] = cheat.compcurnext(menu_blocks[num][leftop], lastmatch[num],
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optable[opsel], formtable[width], value, bcd == 1)
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else
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matches[#matches][num] = cheat.compnext(menu_blocks[num][leftop], menu_blocks[num][rightop],
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lastmatch[num], optable[opsel], formtable[width], value, bcd == 1)
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end
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end
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end
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ret = true
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end
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elseif index == midx.match then
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matchsel = incdec(matchsel, 0, #matches[#matches])
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elseif index == midx.watch then
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watches = {}
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ret = true
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elseif index > midx.match then
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local match = matches[#matches][matchsel][index - midx.match]
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match.mode = incdec(match.mode, 1, 3)
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if event == "select" then
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local dev = devtable[devcur]
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local cheat = { desc = string.format("Test cheat at addr %08X", match.addr), script = {} }
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local wid = formtable[width]:sub(2, 2):lower()
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local xmlcheat
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local form
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if wid == "h" then
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wid = "u16"
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form = "%08x %04x"
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xmlcheat = "pw"
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elseif wid == "l" then
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wid = "u32"
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form = "%08x %08x"
|
|
xmlcheat = "pd"
|
|
elseif wid == "j" then
|
|
wid = "u64"
|
|
form = "%08x %016x"
|
|
xmlcheat = "pq"
|
|
else
|
|
wid = "u8"
|
|
form = "%08x %02x"
|
|
xmlcheat = "pb"
|
|
end
|
|
xmlcheat = string.format("<mamecheat version=1>\n<cheat desc=\"%s\">\n<script state=\"run\">\n<action>%s.%s@%X=%X</action>\n</script>\n</cheat>\n</mamecheat>", cheat.desc, dev.tag:sub(2), xmlcheat, match.addr, match.newval)
|
|
|
|
if dev.space.shortname then
|
|
cheat.ram = { ram = dev.tag }
|
|
cheat.script.on = "ram:write(" .. match.addr .. "," .. match.newval .. ")"
|
|
else
|
|
cheat.space = { cpu = { tag = dev.tag, type = "program" } }
|
|
cheat.script.run = "cpu:write_" .. wid .. "(" .. match.addr .. "," .. match.newval .. ")"
|
|
end
|
|
if match.mode == 1 then
|
|
if not _G.ce then
|
|
manager:machine():popmessage("Cheat engine not available")
|
|
else
|
|
_G.ce.inject(cheat)
|
|
end
|
|
elseif match.mode == 2 then
|
|
local filename = string.format("%s/%s_%08X_cheat", manager:machine():options().entries.cheatpath:value(), emu.romname(), match.addr)
|
|
local json = require("json")
|
|
local file = io.open(filename .. ".json", "w")
|
|
file:write(json.stringify({[1] = cheat}))
|
|
file:close()
|
|
file = io.open(filename .. ".xml", "w")
|
|
file:write(xmlcheat)
|
|
file:close()
|
|
manager:machine():popmessage("Cheat written to " .. filename)
|
|
else
|
|
local func = "return space:read"
|
|
local env = { space = devtable[devcur].space }
|
|
if not dev.space.shortname then
|
|
func = func .. "_" .. wid
|
|
end
|
|
func = func .. "(" .. match.addr .. ")"
|
|
watches[#watches + 1] = { addr = match.addr, func = load(func, func, "t", env), format = form }
|
|
end
|
|
end
|
|
end
|
|
devsel = devcur
|
|
return ret
|
|
end
|
|
emu.register_menu(menu_callback, menu_populate, "Cheat Finder")
|
|
emu.register_frame_done(function ()
|
|
local tag, screen = next(manager:machine().screens)
|
|
local height = mame_manager:ui():get_line_height()
|
|
for num, watch in ipairs(watches) do
|
|
screen:draw_text("left", num * height, string.format(watch.format, watch.addr, watch.func()))
|
|
end
|
|
end)
|
|
end
|
|
|
|
return exports
|