diff options
Diffstat (limited to 'miasm2/ir/translators')
| -rw-r--r-- | miasm2/ir/translators/C.py | 110 | ||||
| -rw-r--r-- | miasm2/ir/translators/python.py | 3 | ||||
| -rw-r--r-- | miasm2/ir/translators/smt2.py | 21 | ||||
| -rw-r--r-- | miasm2/ir/translators/translator.py | 7 | ||||
| -rw-r--r-- | miasm2/ir/translators/z3_ir.py | 16 |
5 files changed, 122 insertions, 35 deletions
diff --git a/miasm2/ir/translators/C.py b/miasm2/ir/translators/C.py index 226f26f1..a8e3a254 100644 --- a/miasm2/ir/translators/C.py +++ b/miasm2/ir/translators/C.py @@ -18,6 +18,14 @@ class TranslatorC(Translator): '>>>': 'rot_right', } + def __init__(self, symbol_pool=None, **kwargs): + """Instance a C translator + @symbol_pool: AsmSymbolPool instance + """ + super(TranslatorC, self).__init__(**kwargs) + # symbol pool + self.symbol_pool = symbol_pool + def _size2mask(self, size): """Return a C string corresponding to the size2mask operation, with support for @size <= 128""" @@ -44,16 +52,31 @@ class TranslatorC(Translator): ) return "0x%x" % expr.arg.arg + def from_ExprLoc(self, expr): + loc_key = expr.loc_key + if self.symbol_pool is None: + return str(loc_key) + offset = self.symbol_pool.loc_key_to_offset(loc_key) + name = self.symbol_pool.loc_key_to_name(loc_key) + + if offset is None: + return name + return "0x%x" % offset + def from_ExprAff(self, expr): - return "%s = %s" % tuple(map(self.from_expr, (expr.dst, expr.src))) + new_dst = self.from_expr(expr.dst) + new_src = self.from_expr(expr.src) + return "%s = %s" % (new_dst, new_src) def from_ExprCond(self, expr): - return "(%s?%s:%s)" % tuple(map(self.from_expr, - (expr.cond, expr.src1, expr.src2))) + new_cond = self.from_expr(expr.cond) + new_src1 = self.from_expr(expr.src1) + new_src2 = self.from_expr(expr.src2) + return "(%s?%s:%s)" % (new_cond, new_src1, new_src2) def from_ExprMem(self, expr): - return "MEM_LOOKUP_%.2d(jitcpu, %s)" % (expr.size, - self.from_expr(expr.arg)) + new_ptr = self.from_expr(expr.arg) + return "MEM_LOOKUP_%.2d(jitcpu, %s)" % (expr.size, new_ptr) def from_ExprOp(self, expr): if len(expr.args) == 1: @@ -63,9 +86,11 @@ class TranslatorC(Translator): self._size2mask(expr.args[0].size), ) elif expr.op in ['cntleadzeros', 'cnttrailzeros']: - return "%s(0x%x, %s)" % (expr.op, - expr.args[0].size, - self.from_expr(expr.args[0])) + return "%s(0x%x, %s)" % ( + expr.op, + expr.args[0].size, + self.from_expr(expr.args[0]) + ) elif expr.op == '!': return "(~ %s)&%s" % ( self.from_expr(expr.args[0]), @@ -78,7 +103,10 @@ class TranslatorC(Translator): expr.op.startswith("fxam_c") or expr.op in ["-", "ftan", "frndint", "f2xm1", "fsin", "fsqrt", "fabs", "fcos", "fchs"]): - return "%s(%s)" % (expr.op, self.from_expr(expr.args[0])) + return "%s(%s)" % ( + expr.op, + self.from_expr(expr.args[0]) + ) else: raise NotImplementedError('Unknown op: %r' % expr.op) @@ -91,10 +119,12 @@ class TranslatorC(Translator): self._size2mask(expr.args[1].size), ) elif expr.op in self.dct_shift: - return 'SHIFT_%s(%d, %s, %s)' % (self.dct_shift[expr.op].upper(), - expr.args[0].size, - self.from_expr(expr.args[0]), - self.from_expr(expr.args[1])) + return 'SHIFT_%s(%d, %s, %s)' % ( + self.dct_shift[expr.op].upper(), + expr.args[0].size, + self.from_expr(expr.args[0]), + self.from_expr(expr.args[1]) + ) elif expr.is_associative() or expr.op in ["%", "/"]: oper = ['(%s&%s)' % ( self.from_expr(arg), @@ -105,9 +135,11 @@ class TranslatorC(Translator): return "((%s)&%s)" % (oper, self._size2mask(expr.args[0].size)) elif expr.op in ['-']: return '(((%s&%s) %s (%s&%s))&%s)' % ( - self.from_expr(expr.args[0]), self._size2mask(expr.args[0].size), + self.from_expr(expr.args[0]), + self._size2mask(expr.args[0].size), str(expr.op), - self.from_expr(expr.args[1]), self._size2mask(expr.args[1].size), + self.from_expr(expr.args[1]), + self._size2mask(expr.args[1].size), self._size2mask(expr.args[0].size) ) elif expr.op in self.dct_rot: @@ -125,21 +157,29 @@ class TranslatorC(Translator): elif (expr.op.startswith("fcom") or expr.op in ["fadd", "fsub", "fdiv", 'fmul', "fscale", "fprem", "fprem_lsb", "fyl2x", "fpatan"]): - return "fpu_%s(%s, %s)" % (expr.op, - self.from_expr(expr.args[0]), - self.from_expr(expr.args[1])) + return "fpu_%s(%s, %s)" % ( + expr.op, + self.from_expr(expr.args[0]), + self.from_expr(expr.args[1]) + ) elif expr.op == "segm": return "segm2addr(jitcpu, %s, %s)" % ( - self.from_expr(expr.args[0]), self.from_expr(expr.args[1])) + self.from_expr(expr.args[0]), + self.from_expr(expr.args[1]) + ) elif expr.op in ['udiv', 'umod', 'idiv', 'imod']: - return '%s%d(%s, %s)' % (expr.op, - expr.args[0].size, - self.from_expr(expr.args[0]), - self.from_expr(expr.args[1])) + return '%s%d(%s, %s)' % ( + expr.op, + expr.args[0].size, + self.from_expr(expr.args[0]), + self.from_expr(expr.args[1]) + ) elif expr.op in ["bcdadd", "bcdadd_cf"]: - return "%s_%d(%s, %s)" % (expr.op, expr.args[0].size, - self.from_expr(expr.args[0]), - self.from_expr(expr.args[1])) + return "%s_%d(%s, %s)" % ( + expr.op, expr.args[0].size, + self.from_expr(expr.args[0]), + self.from_expr(expr.args[1]) + ) else: raise NotImplementedError('Unknown op: %r' % expr.op) @@ -159,9 +199,11 @@ class TranslatorC(Translator): def from_ExprSlice(self, expr): # XXX check mask for 64 bit & 32 bit compat - return "((%s>>%d) &%s)" % (self.from_expr(expr.arg), - expr.start, - self._size2mask(expr.stop - expr.start)) + return "((%s>>%d) &%s)" % ( + self.from_expr(expr.arg), + expr.start, + self._size2mask(expr.stop - expr.start) + ) def from_ExprCompose(self, expr): out = [] @@ -178,10 +220,12 @@ class TranslatorC(Translator): dst_cast = "uint%d_t" % size for index, arg in expr.iter_args(): - out.append("(((%s)(%s & %s)) << %d)" % (dst_cast, - self.from_expr(arg), - self._size2mask(arg.size), - index)) + out.append("(((%s)(%s & %s)) << %d)" % ( + dst_cast, + self.from_expr(arg), + self._size2mask(arg.size), + index) + ) out = ' | '.join(out) return '(' + out + ')' diff --git a/miasm2/ir/translators/python.py b/miasm2/ir/translators/python.py index d7369e9e..e05f5e4d 100644 --- a/miasm2/ir/translators/python.py +++ b/miasm2/ir/translators/python.py @@ -20,6 +20,9 @@ class TranslatorPython(Translator): def from_ExprId(self, expr): return str(expr) + def from_ExprLoc(self, expr): + return str(expr) + def from_ExprMem(self, expr): return "memory(%s, 0x%x)" % (self.from_expr(expr.arg), expr.size / 8) diff --git a/miasm2/ir/translators/smt2.py b/miasm2/ir/translators/smt2.py index 18bcb9bd..6a6fec16 100644 --- a/miasm2/ir/translators/smt2.py +++ b/miasm2/ir/translators/smt2.py @@ -120,7 +120,7 @@ class TranslatorSMT2(Translator): # Implemented language __LANG__ = "smt2" - def __init__(self, endianness="<", **kwargs): + def __init__(self, endianness="<", symbol_pool=None, **kwargs): """Instance a SMT2 translator @endianness: (optional) memory endianness """ @@ -129,6 +129,8 @@ class TranslatorSMT2(Translator): self._mem = SMT2Mem(endianness) # map of translated bit vectors self._bitvectors = dict() + # symbol pool + self.symbol_pool = symbol_pool def from_ExprInt(self, expr): return bit_vec_val(expr.arg.arg, expr.size) @@ -148,6 +150,23 @@ class TranslatorSMT2(Translator): self._bitvectors[str(expr)] = expr.size return str(expr) + def from_ExprLoc(self, expr): + loc_key = expr.loc_key + if self.symbol_pool is None: + if str(loc_key) not in self._bitvectors: + self._bitvectors[str(loc_key)] = expr.size + return str(loc_key) + + offset = self.symbol_pool.loc_key_to_offset(loc_key) + name = self.symbol_pool.loc_key_to_name(loc_key) + + if offset is None: + return bit_vec_val(str(offset), expr.size) + name = "|{}|".format(str(name)) + if name not in self._bitvectors: + self._bitvectors[name] = expr.size + return name + def from_ExprMem(self, expr): addr = self.from_expr(expr.arg) # size to read from memory diff --git a/miasm2/ir/translators/translator.py b/miasm2/ir/translators/translator.py index e3641843..557fdabe 100644 --- a/miasm2/ir/translators/translator.py +++ b/miasm2/ir/translators/translator.py @@ -53,6 +53,12 @@ class Translator(object): """ raise NotImplementedError("Abstract method") + def from_ExprLoc(self, expr): + """Translate an ExprLoc + @expr: ExprLoc to translate + """ + raise NotImplementedError("Abstract method") + def from_ExprCompose(self, expr): """Translate an ExprCompose @expr: ExprCompose to translate @@ -100,6 +106,7 @@ class Translator(object): # Handle Expr type handlers = {m2_expr.ExprInt: self.from_ExprInt, m2_expr.ExprId: self.from_ExprId, + m2_expr.ExprLoc: self.from_ExprLoc, m2_expr.ExprCompose: self.from_ExprCompose, m2_expr.ExprSlice: self.from_ExprSlice, m2_expr.ExprOp: self.from_ExprOp, diff --git a/miasm2/ir/translators/z3_ir.py b/miasm2/ir/translators/z3_ir.py index 536daff1..544dd26f 100644 --- a/miasm2/ir/translators/z3_ir.py +++ b/miasm2/ir/translators/z3_ir.py @@ -116,7 +116,7 @@ class TranslatorZ3(Translator): # Operations translation trivial_ops = ["+", "-", "/", "%", "&", "^", "|", "*", "<<"] - def __init__(self, endianness="<", **kwargs): + def __init__(self, endianness="<", symbol_pool=None, **kwargs): """Instance a Z3 translator @endianness: (optional) memory endianness """ @@ -126,6 +126,8 @@ class TranslatorZ3(Translator): super(TranslatorZ3, self).__init__(**kwargs) self._mem = Z3Mem(endianness) + # symbol pool + self.symbol_pool = symbol_pool def from_ExprInt(self, expr): return z3.BitVecVal(expr.arg.arg, expr.size) @@ -136,6 +138,18 @@ class TranslatorZ3(Translator): else: return z3.BitVec(str(expr), expr.size) + def from_ExprLoc(self, expr): + if self.symbol_pool is None: + # No symbol_pool, fallback to default name + return z3.BitVec(str(expr), expr.size) + label = self.symbol_pool.loc_key_to_label(expr.loc_key) + if label is None: + # No symbol_pool, fallback to default name + return z3.BitVec(str(expr), expr.size) + elif label.offset is None: + return z3.BitVec(label.name, expr.size) + return z3.BitVecVal(label.offset, expr.size) + def from_ExprMem(self, expr): addr = self.from_expr(expr.arg) return self._mem.get(addr, expr.size) |