собенности
переход на следующий адрес по инструкциям ветвления вычисляется Lua кодом по ret, jmp, jmp condition до исполнения кода
определение опкодов ветвления по readmem без дизассемблериования
по тестам последний брейкпоинт снимается на ближайшем цикле
Пример лога до близжайшего цикла, когда поднимается из рутины вверх
> RET :00454684 - C3 - ret
> -->> :0045468C - 5B - pop ebx
> RET :0045468F - C3 - ret
> -->> :00454695 - C3 - ret
> RET :00454695 - C3 - ret
> -->> :00437F36 - 5B - pop ebx
> RET :00437F37 - C3 - ret
> -->> :004272EB - 5B - pop ebx
> RET :004272EC - C3 - ret
> -->> :004273E9 - 5E - pop esi
> RET :004273EA - C3 - ret
> -->> :00437A2E - 5F - pop edi
> RET :00437A34 - C3 - ret
> -->> :0043B749 - 5B - pop ebx
> RET :0043B74D - C3 - ret
> -->> :00427195 - 5F - pop edi
> RET :00427198 - C3 - ret
> -->> :004376BB - 8B 45 FC - mov eax,[ebp-04]
> RET :004376C2 - C2 0400 - ret 0004
> -->> :0043B880 - 89 46 0C - mov [esi+0C],eax
> RET :0043B88A - C3 - ret
> -->> :0043BFF4 - 84 C0 - test al,al
> isCJMP :0043BFF6 - 75 09 - jne 0043C001
> RET :0043C003 - C3 - ret
> -->> :0044DFAD - 5E - pop esi
> RET :0044DFAF - C3 - ret
> -->> :00437A2E - 5F - pop edi
\--[[
Версия: 0.01.b1
Выход из рутины до близжайшего цикла
]]--
mainAddress = 0x0045B5A4 -- адрес некоторого параметра в игре
nextAddress = nil
is64bits = targetIs64Bit()
tableInstruction ={}
tableBreakpointsAddress ={}
function ContaintsBeakPoint(address)
for i = 1, #tableBreakpointsAddress do
if tableBreakpointsAddress[i] == address then
return true
end
end
return false
end
\-- Возвращает адрес по ret
function GetNextAddressFromRET(address)
if is64bits then
nextAddress = readPointer(RSP)
else
nextAddress = readPointer(ESP)
end
return nextAddress
end
\-- Возвращает адрес по Jmp
function GetNextAddressFromJMP(address)
local disassembledstring = nil
if is64bits then
local disassembledstring = disassemble(RIP)
else
local disassembledstring = disassemble(EIP)
end
local _, opcode, _, _ = splitDisassembledString(disassembledstring)
return GetAddressFromOpcode(opcode)
end
function ToBits(num, bits)
local t = {}
for b = bits, 1, -1 do
rest = math.fmod(num,2)
t[b] = math.floor(rest)
num = (num-rest)/2
end
if num == 0 then
return t
else
return {'Not enough bits to represent this number'}
end
end
function GetEFLAGS()
local bitsTable = ToBits(EFLAGS, 16)
local tableEFLAGS =
{
OF = bitsTable[17-12],
DF = bitsTable[17-11],
SF = bitsTable[17-8],
ZF = bitsTable[17-7],
AF = bitsTable[17-5],
PF = bitsTable[17-3],
CF = bitsTable[17-1]
}
--for k,v in pairs(tableEFLAGS) do
-- print (k..' = '..v)
--end
--
--print(EFLAGS)
--local s = ''
--for i=1,#bitsTable do
-- s = s..bitsTable[i]
--end
--print(s)
return tableEFLAGS
end
\-- Возвращает адрес из опкода jmp dword ptr [edi*4+07895D88] или jmp 07895D88
\--print(string.format('%08X', newAddress))
function GetAddressFromOpcode (opcode)
local rightLine = string.match(opcode, '%S*%s*(%S*)')
local isPointer = string.match(opcode, '%[')
if isPointer then
rightLine = string.match(opcode, '%[(.*)%]')
--00454664 - 8B 83 60030000 - mov eax,[ebx+00000360]
if string.match(opcode, 'eax') then rightLine = string.gsub(rightLine, 'eax', EAX) end
if string.match(opcode, 'ebx') then rightLine = string.gsub(rightLine, 'ebx', EBX) end
if string.match(opcode, 'ecx') then rightLine = string.gsub(rightLine, 'ecx', ECX) end
if string.match(opcode, 'edx') then rightLine = string.gsub(rightLine, 'edx', EDX) end
if string.match(opcode, 'esi') then rightLine = string.gsub(rightLine, 'esi', ESI) end
if string.match(opcode, 'edi') then rightLine = string.gsub(rightLine, 'edi', EDI) end
if string.match(opcode, 'esp') then rightLine = string.gsub(rightLine, 'esp', ESP) end
if string.match(opcode, 'ebp') then rightLine = string.gsub(rightLine, 'ebp', EBP) end
if is64bits then
if string.match(opcode, 'rax') then rightLine = string.gsub(rightLine, 'rax', RAX) end
if string.match(opcode, 'rbx') then rightLine = string.gsub(rightLine, 'rbx', RBX) end
if string.match(opcode, 'rcx') then rightLine = string.gsub(rightLine, 'rcx', RCX) end
if string.match(opcode, 'rdx') then rightLine = string.gsub(rightLine, 'rdx', RDX) end
if string.match(opcode, 'rsi') then rightLine = string.gsub(rightLine, 'rsi', RSI) end
if string.match(opcode, 'rdi') then rightLine = string.gsub(rightLine, 'rdi', RDI) end
if string.match(opcode, 'rsp') then rightLine = string.gsub(rightLine, 'rsp', RSP) end
if string.match(opcode, 'rbp') then rightLine = string.gsub(rightLine, 'rbp', RBP) end
if string.match(opcode, 'r8') then rightLine = string.gsub(rightLine, 'r8', R8) end
if string.match(opcode, 'r9') then rightLine = string.gsub(rightLine, 'r9', R9) end
if string.match(opcode, 'r10') then rightLine = string.gsub(rightLine, 'r10', R10) end
if string.match(opcode, 'r11') then rightLine = string.gsub(rightLine, 'r11', R11) end
if string.match(opcode, 'r12') then rightLine = string.gsub(rightLine, 'r12', R12) end
if string.match(opcode, 'r13') then rightLine = string.gsub(rightLine, 'r13', R13) end
if string.match(opcode, 'r14') then rightLine = string.gsub(rightLine, 'r14', R14) end
if string.match(opcode, 'r15') then rightLine = string.gsub(rightLine, 'r15', R15) end
end
return getAddress('%['..rightLine..'%]')
end
return getAddress(rightLine)
end
\-- Возвращает адрес по Jmp condition, когда тот выполняется или не выполняется
function GetNextAddressFromConditionJMP(address, size)
local _,opcode,_,_ = splitDisassembledString(disassemble(address))
local leftString = string.match(opcode, '%S*')
local eflags = GetEFLAGS()
if (leftString == 'jnz' or leftString == 'jne') then if eflags.ZF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'je' or leftString == 'jz') then if eflags.ZF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jg' or leftString == 'jnle') then if eflags.ZF == 0 and eflags.SF == eflags.OF then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jb' or leftString == 'jc' or leftString == 'jnae') then if eflags.CF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jae') then if eflags.CF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'ja') then if eflags.CF == 0 and eflags.ZF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jbe') then if eflags.CF == 1 and eflags.ZF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jl' or leftString == 'jnge') then if eflags.SF ~= eflags.OF then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jle' or leftString == 'jng') then if eflags.ZF == 1 or eflags.SF ~= eflags.OF then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jna') then if eflags.CF == 1 or eflags.ZF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jc') then if eflags.CF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jp' or leftString == 'jpe') then if eflags.PF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jnp' or leftString == 'jpo') then if eflags.PF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jnb' or leftString == 'jnc') then if eflags.CF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jnbe') then if eflags.CF == 0 and eflags.ZF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jno') then if eflags.OF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jns') then if eflags.SF == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jo') then if eflags.OF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'js') then if eflags.SF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jge' or leftString == 'jnl') then if eflags.CF == 1 and eflags.OF == 1 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jrcxz') then if RCX == 0 then return GetAddressFromOpcode(opcode) end
elseif (leftString == 'jecxz') then if ECX == 0 then return GetAddressFromOpcode(opcode) end
end
return address + size
end
function IsRet(address)
local value = readBytes(address,1, false)
return value == 0xC3 or value == 0xCB or value == 0xC2 or value == 0xCA
end
function IsCall(address)
local value = readBytes(address,1, false)
return value == 0xFF or value == 0xE8 -- or value == 0x9A
end
function IsJMP(address)
local value = readBytes (address, 1, false)
if value == 0xFF then
if readBytes (address + 1, 1, false) == 05 then
return false
end
end
return value == 0xEB or value == 0xE9 or value == 0xFF -- or value == 0xEA
\--[[
078921A8 - EB 38 - jmp 078921E2
0789242D - E9 E2000000 - jmp 07892514
07894F4C - FF E2 - jmp edx
07895C67 - FF 24 BD 885D8907 - jmp dword ptr [edi*4+07895D88]
]]--
end
function IsConditionJMP(address)
local value = readBytes (address, 1, false)
return
value == 0x77 or value == 0x73 or value == 0x72 or value == 0x76 or
value == 0xE3 or value == 0x74 or value == 0x7F or value == 0x7D or
value == 0x7C or value == 0x7E or value == 0x75 or value == 0x71 or
value == 0x7B or value == 0x79 or value == 0x70 or value == 0x7A or
value == 0x78 or value == 0x0F
end
\-- Возвращает адрес, на который, будет прыжок
function GetNextAddress(addressXIP)
-- Определить на какой инструкции мы находимся, чтобы узнать на какую следующу инструкцию ставить бряк
-- ret - прыжок по смещению ESP/RSP
-- jmp - прыжок без условия
-- je, jne, jxx - прыжок с улосвием
-- Определить размер инструкции, тип инструкции на текущем addressXIP
local findIndex = -1
for i = 1, #tableInstruction do
if tableInstruction[i].XIP == addressXIP then
findIndex = i
break
end
end
local size = 0
local isRet = false
local isJMP = false
local isCJMP = false
if findIndex == -1 then
-- Если нет данных
---------------- ЗАПОМИНАТЬ РАЗМЕР ИНСТРУКЦИИ (чтобы не дизассемблировать повторно)
size = getInstructionSize(addressXIP)
isRet = IsRet(addressXIP)
isJMP = IsJMP(addressXIP)
isCJMP = IsConditionJMP(addressXIP)
table.insert(tableInstruction, {XIP = addressXIP, SIZE = size, ISRET = isRet, ISJMP = isJMP, ISCJMP = isCJMP})
else
-- Если данные есть
size = tableInstruction[findIndex].SIZE
isRet = tableInstruction[findIndex].ISRET
isJMP = tableInstruction[findIndex].ISJMP
isCJMP = tableInstruction[findIndex].ISCJMP
end
---------------
if isRet then
print('> RET :' ..disassemble(nextAddress))
nextAddress = GetNextAddressFromRET(addressXIP)
print('> -->> :' ..disassemble(nextAddress))
elseif isJMP then
print('> isJMP :' ..disassemble(nextAddress))
nextAddress = GetNextAddressFromJMP(addressXIP)
elseif isCJMP then
print('> isCJMP :' ..disassemble(nextAddress))
nextAddress = GetNextAddressFromConditionJMP(addressXIP, size)
else
nextAddress = addressXIP + size
end
return nextAddress
end
function debugger_onBreakpoint()
local isContaintsBreakPoint = false
-- Удалить прошлый брейкпоинт
if(nextAddress ~= nil) then
isContaintsBreakPoint = ContaintsBeakPoint(nextAddress)
if isContaintsBreakPoint then
debug_removeBreakpoint(nextAddress)
end
end
-- Поставить брейкпоинт на следующую инструкцию не входя в call-ы
local XIP = 0
if is64bits then XIP = EIP else XIP = RIP end
nextAddress = GetNextAddress(XIP)
if not ContaintsBeakPoint(nextAddress) then
debug_setBreakpoint(nextAddress, 1, bptExecute, bpmDebugRegister)
table.insert(tableBreakpointsAddress, nextAddress)
end
return 1 --1 не показывать дизассемблер
end
if getOpenedProcessID() == 0 then
openProcess('test.exe')
end
\--bptWrite
\--bptAccess
debug_removeBreakpoint()
debug_setBreakpoint(mainAddress, 4, bptWrite, bpmDebugRegister)
Справка
77 cb JA rel8 D Valid Valid Jump short if above (CF=0 and ZF=0).
73 cb JAE rel8 D Valid Valid Jump short if above or equal (CF=0).
72 cb JB rel8 D Valid Valid Jump short if below (CF=1).
76 cb JBE rel8 D Valid Valid Jump short if below or equal (CF=1 or ZF=1).
72 cb JC rel8 D Valid Valid Jump short if carry (CF=1).
E3 cb JCXZ rel8 D N.E. Valid Jump short if CX register is 0.
E3 cb JECXZ rel8 D Valid Valid Jump short if ECX register is 0.
E3 cb JRCXZ rel8 D Valid N.E. Jump short if RCX register is 0.
74 cb JE rel8 D Valid Valid Jump short if equal (ZF=1).
7F cb JG rel8 D Valid Valid Jump short if greater (ZF=0 and SF=OF).
7D cb JGE rel8 D Valid Valid Jump short if greater or equal (SF=OF).
7C cb JL rel8 D Valid Valid Jump short if less (SF≠ OF).
7E cb JLE rel8 D Valid Valid Jump short if less or equal (ZF=1 or SF≠ OF).
76 cb JNA rel8 D Valid Valid Jump short if not above (CF=1 or ZF=1).
72 cb JNAE rel8 D Valid Valid Jump short if not above or equal (CF=1).
73 cb JNB rel8 D Valid Valid Jump short if not below (CF=0).
77 cb JNBE rel8 D Valid Valid Jump short if not below or equal (CF=0 andZF=0).
73 cb JNC rel8 D Valid Valid Jump short if not carry (CF=0).
75 cb JNE rel8 D Valid Valid Jump short if not equal (ZF=0).
7E cb JNG rel8 D Valid Valid Jump short if not greater (ZF=1 or SF≠ OF).
7C cb JNGE rel8 D Valid Valid Jump short if not greater or equal (SF≠ OF).
7D cb JNL rel8 D Valid Valid Jump short if not less (SF=OF).
7F cb JNLE rel8 D Valid Valid Jump short if not less or equal (ZF=0 and SF=OF).
71 cb JNO rel8 D Valid Valid Jump short if not overflow (OF=0).
7B cb JNP rel8 D Valid Valid Jump short if not parity (PF=0).
79 cb JNS rel8 D Valid Valid Jump short if not sign (SF=0).
75 cb JNZ rel8 D Valid Valid Jump short if not zero (ZF=0).
70 cb JO rel8 D Valid Valid Jump short if overflow (OF=1).
7A cb JP rel8 D Valid Valid Jump short if parity (PF=1).
7A cb JPE rel8 D Valid Valid Jump short if parity even (PF=1).
7B cb JPO rel8 D Valid Valid Jump short if parity odd (PF=0).
78 cb JS rel8 D Valid Valid Jump short if sign (SF=1).
74 cb JZ rel8 D Valid Valid Jump short if zero (ZF = 1).
0F 87 cw JA rel16 D N.S. Valid Jump near if above (CF=0 and ZF=0). Not supported in 64-bit mode.
0F 87 cd JA rel32 D Valid Valid Jump near if above (CF=0 and ZF=0).
0F 83 cw JAE rel16 D N.S. Valid Jump near if above or equal (CF=0). Not supported in 64-bit mode.
0F 83 cd JAE rel32 D Valid Valid Jump near if above or equal (CF=0).
0F 82 cw JB rel16 D N.S. Valid Jump near if below (CF=1). Not supported in 64-bit mode.
0F 82 cd JB rel32 D Valid Valid Jump near if below (CF=1).
0F 86 cw JBE rel16 D N.S. Valid Jump near if below or equal (CF=1 or ZF=1). Not supported in 64-bit mode.
0F 86 cd JBE rel32 D Valid Valid Jump near if below or equal (CF=1 or ZF=1).
0F 82 cw JC rel16 D N.S. Valid Jump near if carry (CF=1). Not supported in 64-bit mode.
0F 82 cd JC rel32 D Valid Valid Jump near if carry (CF=1).
0F 84 cw JE rel16 D N.S. Valid Jump near if equal (ZF=1). Not supported in 64-bit mode.
0F 84 cd JE rel32 D Valid Valid Jump near if equal (ZF=1).
0F 84 cw JZ rel16 D N.S. Valid Jump near if 0 (ZF=1). Not supported in 64-bit mode.
0F 84 cd JZ rel32 D Valid Valid Jump near if 0 (ZF=1).
0F 8F cw JG rel16 D N.S. Valid Jump near if greater (ZF=0 and SF=OF). Notsupported in 64-bit mode.
0F 8F cd JG rel32 D Valid Valid Jump near if greater (ZF=0 and SF=OF).
0F 8D cw JGE rel16 D N.S. Valid Jump near if greater or equal (SF=OF). Not supported in 64-bit mode.
0F 8D cd JGE rel32 D Valid Valid Jump near if greater or equal (SF=OF).
0F 8C cw JL rel16 D N.S. Valid Jump near if less (SF≠ OF). Not supported in 64-bit mode.
0F 8C cd JL rel32 D Valid Valid Jump near if less (SF≠ OF).
0F 8E cw JLE rel16 D N.S. Valid Jump near if less or equal (ZF=1 or SF≠ OF). Not supported in 64-bit mode.
0F 8E cd JLE rel32 D Valid Valid Jump near if less or equal (ZF=1 or SF≠ OF).
0F 86 cw JNA rel16 D N.S. Valid Jump near if not above (CF=1 or ZF=1). Not supported in 64-bit mode.
0F 86 cd JNA rel32 D Valid Valid Jump near if not above (CF=1 or ZF=1).
0F 82 cw JNAE rel16 D N.S. Valid Jump near if not above or equal (CF=1). Not supported in 64-bit mode.
0F 82 cd JNAE rel32 D Valid Valid Jump near if not above or equal (CF=1).
0F 83 cw JNB rel16 D N.S. Valid Jump near if not below (CF=0). Not supported in 64-bit mode.
0F 83 cd JNB rel32 D Valid Valid Jump near if not below (CF=0).
0F 87 cw JNBE rel16 D N.S. Valid Jump near if not below or equal (CF=0 and ZF=0). Not supported in 64-bit mode.
0F 87 cd JNBE rel32 D Valid Valid Jump near if not below or equal (CF=0 and ZF=0).
0F 83 cw JNC rel16 D N.S. Valid Jump near if not carry (CF=0). Not supported in 64-bit mode.
0F 83 cd JNC rel32 D Valid Valid Jump near if not carry (CF=0).
0F 85 cw JNE rel16 D N.S. Valid Jump near if not equal (ZF=0). Not supported in 64-bit mode.
0F 85 cd JNE rel32 D Valid Valid Jump near if not equal (ZF=0).
0F 8E cw JNG rel16 D N.S. Valid Jump near if not greater (ZF=1 or SF≠ OF). Not supported in 64-bit mode.
0F 8E cd JNG rel32 D Valid Valid Jump near if not greater (ZF=1 or SF≠ OF).
0F 8C cw JNGE rel16 D N.S. Valid Jump near if not greater or equal (SF≠ OF). Not supported in 64-bit mode.
0F 8C cd JNGE rel32 D Valid Valid Jump near if not greater or equal (SF≠ OF).
0F 8D cw JNL rel16 D N.S. Valid Jump near if not less (SF=OF). Not supported in 64-bit mode.
0F 8D cd JNL rel32 D Valid Valid Jump near if not less (SF=OF).
0F 8F cw JNLE rel16 D N.S. Valid Jump near if not less or equal (ZF=0 and SF=OF). Not supported in 64-bit mode.
0F 8F cd JNLE rel32 D Valid Valid Jump near if not less or equal (ZF=0 and SF=OF).
0F 81 cw JNO rel16 D N.S. Valid Jump near if not overflow (OF=0). Not supported in 64-bit mode.
0F 81 cd JNO rel32 D Valid Valid Jump near if not overflow (OF=0).
0F 8B cw JNP rel16 D N.S. Valid Jump near if not parity (PF=0). Not supported in 64-bit mode.
0F 8B cd JNP rel32 D Valid Valid Jump near if not parity (PF=0).
0F 89 cw JNS rel16 D N.S. Valid Jump near if not sign (SF=0). Not supported in 64-bit mode.
0F 89 cd JNS rel32 D Valid Valid Jump near if not sign (SF=0).
0F 85 cw JNZ rel16 D N.S. Valid Jump near if not zero (ZF=0). Not supported in 64-bit mode.
0F 85 cd JNZ rel32 D Valid Valid Jump near if not zero (ZF=0).
0F 80 cw JO rel16 D N.S. Valid Jump near if overflow (OF=1). Not supported in 64-bit mode.
0F 80 cd JO rel32 D Valid Valid Jump near if overflow (OF=1).
0F 8A cw JP rel16 D N.S. Valid Jump near if parity (PF=1). Not supported in 64-bit mode.
0F 8A cd JP rel32 D Valid Valid Jump near if parity (PF=1).
0F 8A cw JPE rel16 D N.S. Valid Jump near if parity even (PF=1). Not supported in 64-bit mode.
0F 8A cd JPE rel32 D Valid Valid Jump near if parity even (PF=1).
0F 8B cw JPO rel16 D N.S. Valid Jump near if parity odd (PF=0). Not supported in 64-bit mode.
0F 8B cd JPO rel32 D Valid Valid Jump near if parity odd (PF=0).
0F 88 cw JS rel16 D N.S. Valid Jump near if sign (SF=1). Not supported in 64-bit mode.
0F 88 cd JS rel32 D Valid Valid Jump near if sign (SF=1).
0F 84 cw JZ rel16 D N.S. Valid Jump near if 0 (ZF=1). Not supported in 64-bit mode.
0F 84 cd JZ rel32 D Valid Valid Jump near if 0 (ZF=1).
Если трейсить трейслогом 1000 инструкций поверх call, то видим многократное повторение пути внутри цикла между 00437A34 и 0044DFAF.
С помощью скрипта можно выйти на цикл не используя трейслог
Можно использоваться функции определения куда прыгнет поток, до его выполнения.
Можно оперировать таблицей адресов с брейкпоинтами в пошаговой отладке.
Не в сети
