How to eval raw x86 code? #18

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1. waynee95 commented on May 18, 2023

   

   waynee95

   on May 18, 2023

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   For now I fixed it with a dirty fix:

   def eval_imm(self, e) -> int:
           if e.data == 'int_a':
              ### fix ###
              from lark import Tree
              if type(e.children[0]) == Tree:
                 v = int(e.children[0].children[0])
              else:
              ### fix ###
   
                 v = int(e.children[0])
              if is_int64(v):
                  return v
              else:
                  raise Exception('eval_imm: invalid immediate:', v)
   
           #if e.data == 'int_a':
           #    return int(e.children[0])
           #elif e.data == 'neg_a':
           if e.data == 'neg_a':
               return -self.eval_imm(e.children[0])
           else:
               raise Exception('eval_imm: unknown immediate:', e)

   Another thing that was missing is the actual "eval" part in the function parse_and_eval_program:

   def parse_and_eval_program(self, s):
           p = x86_parser.parse(s)
           return self.eval_program(p)