def make_helper_call(ret_type, name, arg_types): # type: (str, str, typing.List[str]) -> hr.cexpr_t
"""Make a call expression to a helper function (non-existing function with arbitrary name)."""
helper_expr = hr.cexpr_t()
helper_expr.ea = idaapi.BADADDR
helper_expr.op = hr.cot_helper
helper_expr.helper = name
call_expr = hr.cexpr_t()
call_expr.op = hr.cot_call
call_expr.x = helper_expr
call_expr.a = hr.carglist_t()
# EXTREMELY IMPORTANT: set the expression types. Without this, Hex-Rays will crash
# in mysterious ways.
t = idaapi.tinfo_t()
idaapi.parse_decl2(idaapi.cvar.idati, "%s (__cdecl *)(%s);" % (ret_type, ','.join(arg_types)),
t, idaapi.PT_TYP)
helper_expr.type = t
call_expr.a.functype = t
call_expr.type = t.get_rettype()
return call_expr
def make_call_expr(fcnexpr, args):
expr = ida_hexrays.cexpr_t()
expr.op = ida_hexrays.cot_call
expr.x = fcnexpr
expr.a = ida_hexrays.carglist_t()
return expr