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77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
# Copyright (c) 2016-2019, 2021 by Rocky Bernstein
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Python 3.7 bytecode decompiler scanner
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Does some additional massaging of xdis-disassembled instructions to
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make things easier for decompilation.
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This sets up opcodes Python's 3.7 and calls a generalized
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scanner routine for Python 3.
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"""
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from uncompyle6.scanners.scanner37base import Scanner37Base
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# bytecode verification, verify(), uses JUMP_OPs from here
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from xdis.opcodes import opcode_37 as opc
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# bytecode verification, verify(), uses JUMP_OPS from here
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JUMP_OPs = opc.JUMP_OPS
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class Scanner37(Scanner37Base):
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def __init__(self, show_asm=None):
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Scanner37Base.__init__(self, (3, 7), show_asm)
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return
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pass
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def ingest(self, co, classname=None, code_objects={}, show_asm=None):
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tokens, customize = Scanner37Base.ingest(self, co, classname, code_objects, show_asm)
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for t in tokens:
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# The lowest bit of flags indicates whether the
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# var-keyword argument is placed at the top of the stack
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if t.op == self.opc.CALL_FUNCTION_EX and t.attr & 1:
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t.kind = "CALL_FUNCTION_EX_KW"
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pass
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elif t.op == self.opc.BUILD_STRING:
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t.kind = "BUILD_STRING_%s" % t.attr
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elif t.op == self.opc.CALL_FUNCTION_KW:
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t.kind = "CALL_FUNCTION_KW_%s" % t.attr
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elif t.op == self.opc.FORMAT_VALUE:
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if t.attr & 0x4:
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t.kind = "FORMAT_VALUE_ATTR"
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pass
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elif t.op == self.opc.BUILD_MAP_UNPACK_WITH_CALL:
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t.kind = "BUILD_MAP_UNPACK_WITH_CALL_%d" % t.attr
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elif t.op == self.opc.BUILD_TUPLE_UNPACK_WITH_CALL:
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t.kind = "BUILD_TUPLE_UNPACK_WITH_CALL_%d" % t.attr
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pass
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return tokens, customize
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if __name__ == "__main__":
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from uncompyle6 import PYTHON_VERSION
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if PYTHON_VERSION == 3.7:
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import inspect
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co = inspect.currentframe().f_code
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tokens, customize = Scanner37().ingest(co)
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for t in tokens:
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print(t.format())
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pass
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else:
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print("Need to be Python 3.7 to demo; I am %s." %
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PYTHON_VERSION)
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