94 lines
2.7 KiB
Python
94 lines
2.7 KiB
Python
#!/usr/bin/python2
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import sys
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import re
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import argparse
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from .Emulator import Emulator, REGISTERS
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from .TikzPainter import TikzPainter
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from .AsciiPainter import AsciiPainter
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from . import Junk
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ARG_DESC = '''
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A silly x86-64 emulator and stack visualizer.
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'''
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PAINTER_ID_TO_CLASS = {
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'ascii': AsciiPainter,
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'tikz': TikzPainter
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}
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def parse_args ():
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parser = argparse.ArgumentParser(description = ARG_DESC)
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parser.add_argument('-i', '--input-file', default='-', help = 'File to use as input', dest = 'input-file')
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parser.add_argument('-o', '--output-file', default='-', help = 'File to use as output', dest = 'output-file')
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parser.add_argument('-p', '--painter', default='ascii', help = 'Drawer to use', dest = 'painter-name', choices=PAINTER_ID_TO_CLASS.keys())
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for register in REGISTERS:
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parser.add_argument('--'+register[1:], nargs = 1, type = int, default = None, dest = register, help = 'the initial value of the register')
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args = vars(parser.parse_args())
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# Determine args #
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registers_init = {}
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for register in REGISTERS:
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registers_init[register[1:]] = Junk.Junk('old '+register[1:])
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#
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registers_init['rip'] = 0
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registers_init['rsp'] = 0
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registers_init['rbp'] = Junk.Junk('old bp')
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#
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for register in REGISTERS:
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if args[register]:
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registers_init[register[1:]] = args[register][0]
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#
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program = ""
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if args['input-file'] == '-':
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program = sys.stdin.read()
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else:
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with open(args['input-file']) as file:
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program = file.read()
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# Output file:
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output_file = None
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if args['output-file'] == '-':
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output_file = sys.stdout
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else:
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output_file = open(args['output-file'], 'w')
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# Determine painter class
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painter_class = PAINTER_ID_TO_CLASS[args['painter-name']]
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## Return
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return (program, registers_init, output_file, painter_class)
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def main ():
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(program, registers_init, output_file, painter_class) = parse_args()
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# Determine registers to display
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registers_to_draw = ["%rip","%rbp","%rsp", ""]
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for match in re.findall(r"%r[a-z0-9]{1,2}", program):
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if match not in registers_to_draw:
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registers_to_draw.append(match)
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# Setup emulator and drawer
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emu = Emulator(program)
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emu.setRegs(**registers_init)
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emu.setStack(Junk.Junk("junk..."), Junk.Junk("call eip"))
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painter = painter_class(registers_to_draw)
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# Iteratively draw states.
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painter.saveState(emu)
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for line_nr in emu:
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painter.saveState(emu, line_nr)
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# Display result
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output_file.write(painter.to_string(emu))
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output_file.close()
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if __name__ == "__main__":
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main()
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