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from gdb import *
def search_dll(head, field, match, pfield):
"""
Search in a DLL by iterates over it.
head: name of the symbol denoting the head of the DLL
field: the field that should be search for match
match: the mathing value for field
pfield: the field whose value is to be printed for matched elements; None to
print all fields of the matched elemented
"""
(symbol, _) = lookup_symbol(head)
if symbol is None:
print("Can't find symbol: " + head)
return
symbol_val = symbol.value()
while symbol_val:
symbol_val_def = symbol_val.dereference()
field_val = symbol_val_def[field]
if field_val.type.code == gdb.TYPE_CODE_INT:
val = int(field_val)
res = (match == val)
elif (field_val.type.code == gdb.TYPE_CODE_STRING
) or (field_val.type.code == gdb.TYPE_CODE_ARRAY):
val = str(field_val)
res = (match == val)
elif (field_val.type.code == gdb.TYPE_CODE_TYPEDEF):
val = str(field_val)
res = match in val
else:
continue
if res:
if pfield is None:
print(symbol_val_def)
else:
print(symbol_val_def[pfield])
symbol_val = symbol_val_def["next"]
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