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ShowCallStack.py
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ShowCallStack.py
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import idaapi
import ida_funcs
import ida_bytes
import ida_dbg
import ida_ida
import idc
from idaapi import Choose
#------------------------DEBUG PART------------------------#
DEBUG = 3
INFO = 2
WARNING = 1
LogLevel = 3
def debug(*arg):
if LogLevel >= DEBUG:
unpack_and_print(arg)
def info(*arg):
if LogLevel >= INFO:
unpack_and_print(arg)
def warning(*arg):
if LogLevel >= WARNING:
unpack_and_print(arg)
def unpack_and_print(*arg):
if arg is not None:
arg = arg[0]
msg = str(arg[0])
for i in range(1, len(arg)):
msg+= ", " + str(arg[i])
print(msg)
#----------------------------------------------------------#
#------------------------CONSTANTS-------------------------#
MAX_NUMBER_FUNCTION_TO_SHOW = 1024
#https://hex-rays.com/products/ida/support/idadoc/276.shtml
class OperandType:
GENERAL_REG = 1 # General Register (al, ax, es, ds...) reg
DIRECT_MEM_REF = 2 # Direct Memory Reference (DATA) addr
MEMORY_REF = 3 # Memory Ref [Base Reg + Index Reg] phrase
MEMORY_REG = 4 # Memory Reg [Base Reg + Index Reg + Displacement] phrase+addr
IMMEDIATE_VALUE = 5 # Immediate Value
#https://hex-rays.com/products/ida/support/idadoc/277.shtml
class OperandValueRegister:
RSP = 4
RBP = 5
#----------------------------------------------------------#
#-------------------FunctionAssemblyCalculator-------------#
#this class contains method helps with a calculation in function colde
class FunctionAssemblyCalculator:
def iterateByPaddingToTheLastInstruction(ea):
debug("iterateByPaddingToTheLastInstruction. Address: 0x{:X}".format(ea))
for i in range(0,16):
ea -= 1
bytes = idc.get_bytes(ea, 1)
debug('ea: 0x{:X}'.format(ea))
debug(idc.get_bytes(ea, 1)[0])
if idc.get_bytes(ea, 1)[0] == 0xCC or idc.get_bytes(ea, 1)[0] == 0x90:
print('continue')
continue
break;
def findRetInstruction(prev_ea):
debug("findRetInstruction. Address: 0x{:X}".format(prev_ea))
for i in range(0,256):
debug(idc.print_insn_mnem(prev_ea))
if "ret" in idc.print_insn_mnem(prev_ea):
debug("ret found. Address: 0x{:X}".format(prev_ea))
break
elif idc.print_insn_mnem(prev_ea) == "jmp" and idc.print_operand(prev_ea, 0) == "atexit":
debug("probably mfc")
break
if idaapi.decode_prev_insn(insn, prev_ea) != idaapi.BADADDR:
prev_ea = idaapi.decode_prev_insn(insn, prev_ea)
else:
#ret is not at the end of function
debug('ret is not at the end of function')
#maybe 0xCC bytes?
for i in range(0,16):
prev_ea -= 1
bytes = idc.get_bytes(prev_ea, 1)
debug(idc.get_bytes(prev_ea, 1)[0])
if idc.get_bytes(prev_ea, 1)[0] == 0xCC or idc.get_bytes(prev_ea, 1)[0] == 0x90: #b'0xcc'
debug('continue')
continue
break;
if idaapi.decode_prev_insn(insn, prev_ea) == idaapi.BADADDR:
return (0, 0, 0)
curr_insn = idaapi.decode_prev_insn(insn, prev_ea)
curr_insn += insn.size
debug(idaapi.print_insn_mnem(curr_insn))
prev_ea = curr_insn
return prev_ea
def findRspRbpDifference(curr_ea):
difference = 0
for i in range(0,256):
mnem = idc.print_insn_mnem(curr_ea)
debug(mnem)
idaapi.decode_insn(insn, curr_ea)
if mnem == 'push':
push_offset = 8
difference += push_offset
elif mnem == 'sub':
if idc.get_operand_value(curr_ea, 0) == OperandValueRegister.RSP and idc.get_operand_type(curr_ea, 1) == OperandType.IMMEDIATE_VALUE:
rsp_substraction = idc.get_operand_value(curr_ea, 1)
difference += rsp_substraction
elif mnem == 'mov' or mnem == 'lea':
#debug('type: ', idc.get_operand_type(curr_ea, 0), ' val: ', idc.get_operand_value(curr_ea, 0))
debug( idc.generate_disasm_line(curr_ea, 0))
if idc.get_operand_value(curr_ea, 0) == OperandValueRegister.RBP:
debug(mnem, ' type: ', idc.get_operand_type(curr_ea, 1), ' val: ', 'bp: 0x{:X}'.format(idc.get_operand_value(curr_ea, 1)))
#case 1: mov
if mnem == 'mov':
if idc.get_operand_type(curr_ea, 1) == OperandType.GENERAL_REG and idc.get_operand_value(curr_ea, 1) == OperandValueRegister.RSP:
displacement = 0
#case 2: lea
if mnem == 'lea':
if idc.get_operand_type(curr_ea, 1) == OperandType.MEMORY_REG:
if idc.get_operand_value(curr_ea, 1) > 0xF000000000000000:
displacement = 0x10000000000000000 - idc.get_operand_value(curr_ea, 1)
difference += displacement
else:
displacement = idc.get_operand_value(curr_ea, 1)
difference -= displacement
break
curr_ea += insn.size
return difference
#----------------------------------------------------------#
class MyChoose(Choose):
def __init__(self, items, call_addr_list, title):
Choose.__init__(
self,
title,
[ ["Call Address", 10], ["Call Argument", 20], ["Caller function", 20],
["Function offset", 10], ["Segment", 10], ["Stack pointer", 10] ],
flags = Choose.CH_RESTORE
| (Choose.CH_CAN_INS
| Choose.CH_CAN_DEL
| Choose.CH_CAN_EDIT
| Choose.CH_CAN_REFRESH),
embedded = None,
width = None,
height = None)
self.items = items
self.call_addr_list = call_addr_list
self.icon = 5
self.selcount = 0
self.modal = False
#maybe add some popup names?
#self.popup_names = ["First", "Second", "Third"]
def OnInit(self):
#debug("inited", str(self))
return True
def OnGetSize(self):
n = len(self.items)
#debug("getsize -> %d" % n)
return n
def OnGetLine(self, n):
#debug("getline %d" % n)
return self.items[n]
def OnRefresh(self, n):
start()
def OnSelectLine(self, n):
info("index: {}, addr: {}".format(n, hex(self.call_addr_list[n])))
ida_kernwin.jumpto(self.call_addr_list[n])
return (Choose.NOTHING_CHANGED, )
#redundant
# def OnCommand(self, n, cmd_id):
# if cmd_id == self.cmd_jmp:
# row = self.items[n]
# idc.jumpto(int(row[0], 16))
#def show(self):
#self.Show()
#self.cmd_jmp = self.AddCommand("Jump to call")
def extract_function_info_from_nearest_name(call_addr):
if nearest_name:
nearest_fun_debug_info = nearest_name.find(call_addr)
if nearest_fun_debug_info:
nearest_fun_debug_info_Ea, nearest_fun_debug_info_Name, index = nearest_fun_debug_info
nearest_fun_debug_info_EndEa = find_func_end(nearest_fun_debug_info_Ea)
debug("nearest_fun_debug_info_Name: {}, call_addr: {:X}, nearest_fun_debug_info_Ea: {:X}, nearest_fun_debug_info_EndEa: {:X}".format(nearest_fun_debug_info_Name, call_addr, nearest_fun_debug_info_Ea, nearest_fun_debug_info_EndEa))
if call_addr >= nearest_fun_debug_info_Ea and call_addr <= nearest_fun_debug_info_EndEa:
function_ea = nearest_fun_debug_info_Ea
function_name = nearest_fun_debug_info_Name
return (True, function_name, function_ea, nearest_fun_debug_info_EndEa)
return (False, None, None, None)
def get_func_name_and_call_offset(call_addr):
success, function_name, function_ea, function_end_ea = extract_function_info_from_nearest_name(call_addr)
if success:
#don't know why function_name sometimes is None. TODO check this
if function_name is None:
function_name = "unknown name"
call_offset_in_function = "+0x{:X}".format(call_addr - function_ea)
else:
#failed to get info from nearest name
function_info = idaapi.get_func(call_addr)
if not function_info:
ida_funcs.add_func(call_addr, idaapi.BADADDR)
function_info = idaapi.get_func(call_addr)
if function_info:
function_ea = function_info.start_ea
function_name = idc.get_func_name(function_ea)
call_offset_int = call_addr - function_ea
call_offset_in_function = "+0x{:X}".format(call_offset_int)
return (function_name, call_offset_in_function, function_ea, function_end_ea)
def get_info_about_call(call_addr, call_arg, stack_ptr, current_function = False):
one_row = []
call_addr_str = '{:08X}'.format(call_addr)
#when print current function, then add " <ip>"
if current_function:
call_addr_str += " <ip>"
#"Call Address" column
one_row.append(call_addr_str)
#"Call Argument", column
one_row.append(call_arg)
function_name, call_offset_in_function, _, _ = get_func_name_and_call_offset(call_addr)
#when print current function, then add " <curr fun>"
if current_function:
function_name += " <curr fun>"
#"Function name" column
one_row.append(function_name)
#when print current function, then add " <curr pos>"
if current_function:
call_offset_in_function += " <curr pos>"
#Function offset" column
one_row.append(call_offset_in_function)
#"Segment" columns
one_row.append(idaapi.get_segm_name(idaapi.getseg(call_addr)))
#"Stack pointer" column
one_row.append(" 0x{:X}".format(stack_ptr))
return one_row
def check_previous_inst_is_call(return_addr, is_64bit):
list_of_call_inst_lengths = [2, 3, 5, 6, 7]
if is_64bit:
list_of_call_inst_lengths.append(9)
for call_length in list_of_call_inst_lengths:
call_addr = return_addr - call_length
try:
if idaapi.is_call_insn(call_addr) and idc.create_insn(call_addr) and print_insn_mnem(call_addr) == "call":
return (True, call_addr)
except ValueError:
continue
return (False, None)
def set_version_and_platform_specific_elements():
if idaapi.IDA_SDK_VERSION < 730:
is_64bit = idaapi.get_inf_structure().is_64bit()
is_32bit = idaapi.get_inf_structure().is_32bit() and not is_64bit
elif idaapi.IDA_SDK_VERSION < 760:
is_64bit = idaapi.inf_is_64bit()
is_32bit = idaapi.inf_is_32bit() and not is_64bit
else:
is_64bit = idaapi.inf_is_64bit()
is_32bit = idaapi.inf_is_32bit_exactly()
return is_64bit
def calculate_caller_function_frame_info_x64(ea, sp, bp):
PTR_SIZE = 8
debug('ea: 0x{:X}'.format(ea))
function_info = idaapi.get_func(ea)
if function_info:
function_start_ea = function_info.start_ea
function_end_ea = function_info.end_ea
else:
debug('function_info is None')
_, _, function_start_ea, function_end_ea = get_func_name_and_call_offset(ea)
debug('function_start_ea: 0x{:X}, function_end_ea: 0x{:X}'.format(function_start_ea, function_end_ea))
prev_ea = idaapi.decode_prev_insn(insn, function_end_ea)
#often padding is present at the end of a function. Iterate by padding to the last function's instruction
if prev_ea == idaapi.BADADDR:
prev_ea = FunctionAssemblyCalculator.iterateByPaddingToTheLastInstruction(function_end_ea)
#often ret is not at the end of the function but earlier. Find it
prev_ea = FunctionAssemblyCalculator.findRetInstruction(prev_ea)
#case 2: find a 'pop rbp' or 'add rsp, X'. Skip or pops
#prev_ea point to 'ret' instruction. Get previous instrucion
prev_ea = idaapi.decode_prev_insn(insn, prev_ea)
#if at the end some values are popped from stack then we need remember that
pop_instruction_number = 0
while idc.print_insn_mnem(prev_ea) == "pop":
debug(idc.get_operand_value(prev_ea, 0))
if idc.get_operand_value(prev_ea, 0) == OperandValueRegister.RBP:
#pop rbp found. Unfortunately I don't konw a value of current rbp so I need calculate.
debug('CASE 2.1: calculate bp from function prolog')
# there is a need to use rbp. Unfortunately we don't know a corelation between rsp and rbp, so we need use simple heuristic to deterimne it.
# Script will scan function from beginning looking for operation like: mov rbp, rsp or lea rbp, [rsp+0x00]
difference = FunctionAssemblyCalculator.findRspRbpDifference(function_start_ea)
#values for current funciton
sp = bp + difference
ret = idc.get_qword(sp)
bp = sp - PTR_SIZE
#Calculate registers for caller. ret takes a value from stack so I need change sp one more time
sp += PTR_SIZE
bp = idc.get_qword(bp) #get bp value from stack
debug('sp: 0x{:X}'.format(sp))
debug('bp: 0x{:X}'.format(bp))
return (ret, sp, bp)
else:
prev_ea = idaapi.decode_prev_insn(insn, prev_ea)
pop_instruction_number += 1
#CASE 2.2: get func base pointer from rbp
debug('CASE 2.2: calclulate bp from function epilog')
debug(idc.print_insn_mnem(prev_ea), idc.get_operand_value(prev_ea, 0))
old_sp = sp
function_stack_size = 0
mnem = idc.print_insn_mnem(prev_ea)
arg_0_type = idc.get_operand_type(prev_ea,0)
arg_0_value = idc.get_operand_value(prev_ea,0)
arg_1_type = idc.get_operand_type(prev_ea,1)
if mnem == "add" and arg_0_type == OperandType.GENERAL_REG and arg_0_value == OperandValueRegister.RSP and arg_1_type == OperandType.IMMEDIATE_VALUE:
#this function has own place for stack. Count it
function_stack_size = idc.get_operand_value(prev_ea, 1)
sp += function_stack_size
sp = sp + pop_instruction_number*PTR_SIZE
ret = idc.get_qword(sp)
#ret takes a value from stack so I need change sp one more time
sp += PTR_SIZE
#one more thing to do. Often previous instruction restoring rbp
prev_ea = idaapi.decode_prev_insn(insn, prev_ea)
mnem = idc.print_insn_mnem(prev_ea)
arg_0_type = idc.get_operand_type(prev_ea,0)
arg_0_value = idc.get_operand_value(prev_ea,0)
arg_1_type = idc.get_operand_type(prev_ea,1)
if mnem == 'mov' and arg_0_type == OperandType.GENERAL_REG and arg_0_value == OperandValueRegister.RBP and arg_1_type == OperandType.MEMORY_REG:
bp = idc.get_qword(old_sp + idc.get_operand_value(prev_ea, 1))
debug(mnem, 'type0: ', arg_0_type, arg_0_value, 'type0: ', arg_1_type, idc.get_operand_value(prev_ea, 1))
return (ret, sp, bp)
def get_all_calls():
is_64bit = set_version_and_platform_specific_elements()
call_list = []
call_addr_list = []
#check if stack segment is None. It's a problem
if is_64bit:
sp = cpu.Rsp
ip = cpu.Rip
else:
sp = cpu.Esp
ip = cpu.Eip
if idaapi.getseg(sp) is None:
warning("Stack segment is None")
return False
#information about current fun
is_current_fun = True
call_list.append(get_info_about_call(ip, "", sp, is_current_fun))
call_addr_list.append(ip)
#iterate by stack
if is_64bit:
#at the begging return address is set as a current ip
return_addr = cpu.Rip
curr_sp = cpu.Rsp
curr_bp = cpu.Rbp
for i in range(0, MAX_NUMBER_FUNCTION_TO_SHOW):
return_addr, curr_sp, curr_bp = calculate_caller_function_frame_info_x64(return_addr, curr_sp, curr_bp)
if return_addr == idaapi.BADADDR or return_addr == 0:
break
curr_segment = idaapi.getseg(return_addr)
#segmenst must exists and be executable
if not curr_segment or (curr_segment.perm & idaapi.SEGPERM_EXEC) == 0:
continue
is_call, curr_call_addr = check_previous_inst_is_call(return_addr, is_64bit)
if not is_call:
continue
#if bytes are not disassembled, then do it
flags = ida_bytes.get_full_flags(curr_call_addr)
if not ida_bytes.is_code(flags):
idc.create_insn(curr_call_addr)
#save a call argument
call_list.append(get_info_about_call(curr_call_addr, print_operand(curr_call_addr, 0), return_addr))
call_addr_list.append(curr_call_addr)
else:
curr_ebp = cpu.Ebp
ptr_size = 4
pfn_get_ptr = idc.get_wide_dword
for i in range(0, MAX_NUMBER_FUNCTION_TO_SHOW):
return_addr = pfn_get_ptr(curr_ebp + ptr_size)
debug('ret: {:08X}'.format(return_addr))
curr_ebp = pfn_get_ptr(curr_ebp)
debug('ebp: {:08X}'.format(curr_ebp))
if return_addr == idaapi.BADADDR or return_addr == 0:
break
curr_segment = idaapi.getseg(return_addr)
#segmenst must exists and be executable
if not curr_segment or (curr_segment.perm & idaapi.SEGPERM_EXEC) == 0:
continue
is_call, curr_call_addr = check_previous_inst_is_call(return_addr, is_64bit)
if not is_call:
continue
#if bytes are not disassembled, then do it
flags = ida_bytes.get_full_flags(curr_call_addr)
if not ida_bytes.is_code(flags):
idc.create_insn(curr_call_addr)
#save a call argument
call_list.append(get_info_about_call(curr_call_addr, print_operand(curr_call_addr, 0), curr_ebp))
call_addr_list.append(curr_call_addr)
return True, call_list, call_addr_list
def init_nearest_names():
debugNamesList = ida_name.get_debug_names(
ida_ida.inf_get_min_ea(),
ida_ida.inf_get_max_ea())
#NearestName definition: <ida_dir>\python\3\ida_name.py, line: 1351
#if your idapython NearestName is unavailable, comment this code
return idaapi.NearestName(debugNamesList)
#program starts here
def start():
process_is_suspended = False
#check if process is suspended
if idaapi.is_debugger_on():
if idaapi.get_process_state() == -1:
process_is_suspended = True
else:
idaapi.warning("Please suspend the debugger!")
else:
idaapi.warning("Please run the process!")
#then start a stack checking
if process_is_suspended:
is_success, call_list, call_addr_list = get_all_calls()
if is_success and call_list is not None:
curr_thread = ida_dbg.get_current_thread()
title = "CallStack - thread: {}".format(curr_thread)
idaapi.close_chooser(title)
c = MyChoose(call_list, call_addr_list, title)
c.Show()
else:
idaapi.warning("Something wrong. There is no functions. Set DEBUG flag in the script and check what is going on")
insn = ida_ua.insn_t()
nearest_name = init_nearest_names()
debug(nearest_name)
start()