def get_symbol_address(symbol):
"""
for a given Maple symbol, returns its address in hex string via gdb p command,
or None if not found
"""
cmd = 'p ' + symbol
try:
result = m_util.gdb_exec_to_str(cmd)
except:
return None
match_pattern = '<' + symbol + '>'
if result.find(match_pattern) is -1:
return None
else:
x = result.split()
pattern_index = x.index(match_pattern)
return x[pattern_index - 1]
def __init__(self):
gdb.Command.__init__(self, "msrcpath", gdb.COMMAND_FILES,
gdb.COMPLETE_NONE)
global maple_source_path_list
# add current working directory at the top
line = m_util.gdb_exec_to_str('pwd')
if line:
s = line.split()
line = s[2][:-1] if len(s) is 3 else None
if line:
maple_source_path_list.append(
os.path.expandvars(os.path.expanduser(line)))
'''
if len(maple_source_path_list) == 1:
gdb_print("Maple application source code search path only has one path as following:")
gdb_print(" ", maple_source_path_list[0])
gdb_print("Please add more search paths using msrcpath -add <path> command")
'''
m_util.gdb_exec('alias msp = msrcpath')
def get_symbol_name_by_current_func_args():
"""
get the 'func' symbol name and its address in currect frame stack
"""
cmd = 'p func'
try:
result = m_util.gdb_exec_to_str(cmd)
except:
return None, None
if m_debug.Debug: m_debug.dbg_print("result=", result)
if 'header = ' in result and '_mirbin_info>' in result:
s = result.split('header = ')
address = s[1].split()[0]
name = s[1].split()[1].split('>')[0][1:]
caller = result.split('caller = ')[1].split(',')[0]
if m_debug.Debug: m_debug.dbg_print("address=", address, "name=", name, "caller=", caller)
return address, name
else:
return None, None
def print_array_class_values(self, addr):
""" display 10 items if length is less than 10, or first 7 and last three if length is over 11 """
item_num = self.get_array_length(addr)
if item_num > 10:
item_list = [
0, 1, 2, 3, 4, 5, 6, item_num - 3, item_num - 2, item_num - 1
]
else:
item_list = [i for i in range(item_num)]
steps = 0
show_snip = True
for i in item_list:
obj_addr = addr + 4 + 8 * i # class reference is a pointer, 8 bytes
cmd = 'x/1gx ' + hex(obj_addr)
if m_debug.Debug: m_debug.dbg_print("cmd=", cmd)
try:
buffer = m_util.gdb_exec_to_str(cmd)
except:
buf = ' [{}] {}'.format(i, 'no-data')
gdb_print(buf)
steps += 1
continue
steps += 1
v = buffer.split(':')[1].strip()
v = hex(int(v, 16)) #remove leading 0s. e.g. 0x000123 to 0x123
buf = ' [{}] {}'.format(i, v)
gdb_print(buf)
if item_num > 10 and steps > 6 and show_snip == True:
gdb_print(" ...")
show_snip = False
return
def stop(self):
"""
provide stop control logic here.
note, user will add one or more Maple symbol into mbp_table, only those qualified
ones in mbp_table will be admitted to make breakpoint stop
return True: to stop
False: to bypass
"""
# if the Maple breakpoint was created before .so is loaded, when the breakpoint is hit,
# plt will be not disable. So we disable it
buf = m_util.gdb_exec_to_str("info b")
if not is_maple_invoke_bp_plt_disabled(buf):
disable_maple_invoke_bp_plt(buf)
return False
# if the Maple breakpoint was created before .so is loaded, bp_addr, bp_info (location)
# if not available. But once hit, address and loc start to be available.
if not self.bp_info or not self.bp_addr:
self.bp_addr, self.bp_info = get_maple_invoke_bp_stop_addr(buf)
# determine whether need to look up pending symbol's address. If the number of loaded libraries
# is not eaual to the one saved, then libs might have been loaded or unloaded, so we try to update
if len(gdb.objfiles()) != self.load_objfiles:
self.load_objfiles = len(gdb.objfiles())
pending_addr_symbol_list = self.get_pending_addr_symbol_list()
if len(pending_addr_symbol_list) > 0:
for sym in pending_addr_symbol_list:
self.update_pending_addr_symbol(sym)
# NOTE!!! here we are getting the current stack's mir_header's address
args_addr = m_symbol.get_symbol_addr_by_current_frame_args()
if not args_addr or not args_addr in self.mbp_addr_sym_table:
return False
# mir_header address matches one breakpoint address list
table_args_addr = self.mbp_addr_sym_table[args_addr]
args_symbol = table_args_addr['mir_symbol']
match_pattern = table_args_addr['symbol']
# it is possible that match pattern is in mbp_addr_sym_table for address check,
# but the self.mbp_addr_sym_table[args_addr]['symbol'] could have been cleared
# in self.mbp_table by user's mb -clear command
if not match_pattern in self.mbp_table:
return False
# Maple symbol for the breakpoint is disabled
table_match_pattern = self.mbp_table[match_pattern]
if table_match_pattern['disabled'] is True:
return False
if table_match_pattern['ignore_count'] > 0:
table_match_pattern['ignore_count'] -= 1
return False
table_match_pattern['hit_count'] += 1
# update the Maple gdb runtime metadata store.
m_datastore.mgdb_rdata.update_gdb_runtime_data()
# update the Maple frame change count
m_datastore.mgdb_rdata.update_frame_change_counter()
return True
def get_value_from_memory(self, addr, offset, length):
"""
params:
addr: int
offset: int
length: int
returns:
value in string
"""
if m_debug.Debug:
m_debug.dbg_print("addr=", addr, " offset=", offset, " length=",
length)
hex_string = None
doulbe_string = None
long_string = None
int_string = None
float_string = None
word_string = None
short_string = None
byte_string = None
ret = None
if length == 8: # 8 byte, could be a long, a 8 byte address ptr, or a double
cmd = 'x/1gx ' + hex(addr + offset) # cmd to get 8 byte address
try:
hex_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
hex_string = hex_string.split(':')[1]
hex_string = hex(int(hex_string, 16))
cmd = 'x/1gf ' + hex(
addr + offset) # cmd to get 8 byte double value
try:
double_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
double_string = double_string.split()[1]
cmd = 'x/1dg ' + hex(addr + offset) # cmd to get 8 byte long value
try:
long_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
long_string = long_string.split()[1]
ret = 'hex:' + hex_string + ',long:' + long_string + ',double:' + double_string
if m_debug.Debug: m_debug.dbg_print("ret=", ret)
return ret
elif length == 4: # 4 byte,could be int, float, hex
cmd = 'x/1xw ' + hex(
addr + offset) # cmd to get 4 byte hex address
try:
hex_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
hex_string = hex_string.split()[1]
cmd = 'x/1dw ' + hex(addr + offset) # cmd to get 4 byte int
try:
int_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
int_string = int_string.split()[1]
cmd = 'x/1fw ' + hex(addr + offset) # cmd to get 4 byte float
try:
float_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
float_string = float_string.split()[1]
ret = 'hex:' + hex_string + ',int:' + int_string + ',float:' + float_string
if m_debug.Debug: m_debug.dbg_print("ret=", ret)
return ret
elif length == 2: # 2 byte, could be short, hex, 2 character
cmd = 'x/1xh ' + hex(
addr + offset) # cmd to get 2 byte hex address
try:
hex_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
hex_string = hex_string.split()[1]
cmd = 'x/1dh ' + hex(addr + offset) # cmd to get 2 byte short int
try:
short_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
short_string = short_string.split()[1]
cmd = 'x/2b ' + hex(addr + offset) # cmd to get 2 byte characters
try:
byte_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
byte_string = byte_string.split(':')[1].strip()
ret = 'hex:' + hex_string + ',short:' + short_string + ',byte:' + byte_string
if m_debug.Debug: m_debug.dbg_print("ret=", ret)
return ret
elif length == 1: # 1 byte. could be hex, c
cmd = 'x/1xb ' + hex(addr + offset) # cmd to get 1 byte hex
try:
hex_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
hex_string = hex_string.split()[1]
cmd = 'x/1cb ' + hex(addr + offset) # cmd to get 1 byte characters
try:
byte_string = m_util.gdb_exec_to_str(cmd)
except:
if m_debug.Debug: m_debug.dbg_print()
return None
byte_string = byte_string.split(':')[1].strip()
ret = 'hex:' + hex_string + ',byte:' + byte_string
if m_debug.Debug: m_debug.dbg_print("ret=", ret)
return ret
else:
if m_debug.Debug: m_debug.dbg_print()
return None
def get_maple_caller_argument_value(arg_idx, arg_num, mtype):
"""
for a given Maple caller's arg_idx, arg_num and type,
get its value from caller's operand_stack
params:
arg_idx: the argument index in a Maple method.
e.g. method1(int a, long b, string c), for
argument "a", its arg index is 0, c is 2.
arg_num: number of argument a method has
mtype : a string. definition in m_asm.py
for "a", it could be 'i32', 'i64'
returns:
the argument value in string.
"""
if m_debug.Debug: m_debug.dbg_print("pass in arg_idx=", arg_idx, "arg_num=", arg_num, "mtype=", mtype)
# get the caller.sp first
try:
buffer = m_util.gdb_exec_to_str('p caller.sp')
except:
return None
if 'No symbol "caller" in current context.' in buffer:
return None
if ' = ' in buffer:
sp = int(buffer.split(' = ')[-1])
else:
return None
if arg_idx > sp: #sp must be >= num of args
return None
if m_debug.Debug: m_debug.dbg_print("sp=", sp)
# get the caller.operand_stack length
try:
buffer = m_util.gdb_exec_to_str('p caller.operand_stack.size()')
except:
return None
if buffer[0] != '$':
return None
if ' = ' in buffer:
try:
length = int(buffer.split(' = ')[1])
except:
return None
else:
return None
if m_debug.Debug: m_debug.dbg_print("length=", length)
if length < arg_idx:
return None
# get the caller.operand_stack[arg_idx]
idx = sp - arg_num + arg_idx + 1
try:
buffer = m_util.gdb_exec_to_str('p caller.operand_stack[' + str(idx) + ']')
except:
return None
vline = buffer.split('x = ')[1][1:].split('}')[0]
v = vline.split(mtype+' = ')[1].split(',')[0] if mtype in vline else None
return v
