cdl_utils: remove unmaintained python library

simpleeval is no longer maintained. As the python setuptool has dropped
python 2 support completely, it is unable to install simpleeval from
source. Replacing it with the builtin eval(). It only takes input from
camkes template, which is somewhat trusted. Simple sanity check is also
added to filter out unexpected inputs.

Signed-off-by: Siwei Zhuang <[email protected]>

cdl_utils/capdl_linker.py

@@ -5,7 +5,6 @@
 # SPDX-License-Identifier: BSD-2-Clause
 #
 
-from simpleeval import EvalWithCompoundTypes
 from capdl.Object import register_object_sizes, Untyped
 from capdl.Allocator import ASIDTableAllocator, BestFitAllocator
 from capdl import ELF, lookup_architecture, TCB, valid_architectures
@@ -63,11 +62,10 @@ def final_spec(args, obj_space, cspaces, addr_spaces, targets, architecture):
                     # We exclude TCBs that refer to a different CSpace
                     continue
                 funcs = {"get_vaddr": lambda x: elf.get_symbol_vaddr(x)}
-                s = EvalWithCompoundTypes(functions=funcs)
-                tcb.ip = s.eval(str(tcb.ip))
-                tcb.sp = s.eval(str(tcb.sp))
-                tcb.addr = s.eval(str(tcb.addr))
-                tcb.init = s.eval(str(tcb.init))
+                tcb.ip = eval(str(tcb.ip), {"__builtins__": None}, funcs)
+                tcb.sp = eval(str(tcb.sp), {"__builtins__": None}, funcs)
+                tcb.addr = eval(str(tcb.addr), {"__builtins__": None}, funcs)
+                tcb.init = eval(str(tcb.init), {"__builtins__": None}, funcs)
                 if not args.fprovide_tcb_caps:
                     del cspace.cnode[slot]
         cspace.cnode.finalise_size(arch=arch)