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jblitzar
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github-python

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self._initialized = True
self.file = self.get_file()
self.regs = self.get_regs()
def get_file(self):
"""
Get file from gdb
"""
out = gdb.execute("info files", to_string=True)
if out and '"' in out:
p = re.compile(".*exec file:\s*`(.*)'")
m = p.search(out)
if m:
result = m.group(1)
else: # stripped file, get symbol file
p = re.compile("Symbols from \"([^\"]*)")
m = p.search(out)
if m:
result = m.group(1)
return result
def get_regs(self):
"""
Get registers from gdb
"""
out = gdb.execute("info registers", to_string=True).encode("ascii")
regs = {}
for line in out.splitlines():
reg, reg_val = line.split()[0:2]
regs[reg] = int(reg_val, 0)
return regs
def get_argc(self):
stack_start_address = self.get_stack_start_address()
argc_raw = "".join(
list(gdb.selected_inferior().read_memory(stack_start_address,
Arch().pointer_byte)))
return struct.unpack(Arch().struct_format, argc_raw)[0]
def get_argv_list(self):
"""
Return argv list
argv_list = [
[argv[0] address, size],
[argv[1] address, size]
]
"""
argv_list = []
argv_base = self.get_stack_start_address() + Arch().pointer_byte
for i in range(self.get_argc()):
pointer = argv_base + Arch().pointer_byte * i
pointer_raw = "".join(
list(gdb.selected_inferior().read_memory(
pointer,
Arch().pointer_byte)))
address = struct.unpack(Arch().struct_format, pointer_raw)[0]
size = 0
while ord(
list(gdb.selected_inferior().read_memory(
address + size, 1))[0]) != 0:
size += 1
argv_list.append((address, size))
return argv_list
def get_stack_start_address(self):
out = gdb.execute("info proc all", to_string=True)
line = out.splitlines()[-1]
pattern = re.compile("(0x[0-9a-f]*)")
matches = pattern.findall(line)
return int(matches[0], 0)
def get_main_frame_number(self):
out = gdb.execute("backtrace", to_string=True)
# #1 0x080484af in main ()
pattern = re.compile("#([\d])\s+(0x[0-9a-f]*)\sin\s(\w+)")
matches = pattern.findall(out)
for (num, address, name) in matches:
if name == "main":
return num
return None
def get_memory(self, address, size):
"""
Get memory content from gdb
Args:
- address: start address of memory
- size: address length
Returns:
- list of memory content
"""
return map(ord, list(gdb.selected_inferior().read_memory(
address, size)))
def get_reg(self, reg):
"""
Get register from gdb
Args:
- reg: register name
Returns: