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import random
from miasm2.expression.expression import *
from miasm2.expression.expression_helper import ExprRandom
from miasm2.ir.translators import Translator
random.seed(0)
class ExprRandom_OpSubRange(ExprRandom):
operations_by_args_number = {1: ["-"],
2: ["<<", ">>",],
"2+": ["+", "*", "&", "|", "^"],
}
print "[+] Compute a random expression:"
expr = ExprRandom_OpSubRange.get(depth=8)
print "-> %s" % expr
print
target_exprs = {lang:Translator.to_language(lang).from_expr(expr)
for lang in Translator.available_languages()}
for target_lang, target_expr in target_exprs.iteritems():
print "[+] Translate in %s:" % target_lang
print target_expr
print
print "[+] Eval in Python:"
def memory(addr, size):
ret = random.randint(0, (1 << size) - 1)
print "Memory access: @0x%x -> 0x%x" % (addr, ret)
return ret
for expr_id in expr.get_r(mem_read=True):
if isinstance(expr_id, ExprId):
value = random.randint(0, (1 << expr_id.size) - 1)
print "Declare var: %s = 0x%x" % (expr_id.name, value)
globals()[expr_id.name] = value
print "-> 0x%x" % eval(target_exprs["Python"])
print "[+] Validate the Miasm syntax rebuilding"
exprRebuild = eval(target_exprs["Miasm"])
assert(expr == exprRebuild)
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