311 lines
13 KiB
Python
311 lines
13 KiB
Python
import re, string, struct
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from subprocess import Popen, PIPE, STDOUT
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import color, mode
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from lex import Grammar, PatternRule, RegionRule
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from method import Method, Argument
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from point import Point
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class HexSetByteOrder(Method):
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'''Sets the byte-order to use to 'little', 'big', or 'native' order'''
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args = [Argument("byteorder", type=type(''), prompt="Byte order: ")]
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def _execute(self, w, **vargs):
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order = vargs['byteorder']
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if order in w.mode.byteorders:
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w.mode.byteorder = order
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w.set_error("byte-order set to %r" % w.mode.byteorder)
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else:
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w.set_error("invalid ordering %r (use 'little', 'big', or 'native'")
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class HexForward(Method):
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def _execute(self, w, **vargs):
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w.forward()
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end = w.buffer.get_buffer_end()
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while w.cursor_char().isspace() and w.cursor < end:
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w.forward()
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class HexBackward(Method):
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def _execute(self, w, **vargs):
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w.backward()
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start = w.buffer.get_buffer_start()
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while w.cursor_char().isspace() and w.cursor > start:
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w.backward()
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class HexForwardWord(Method):
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def _execute(self, w, **vargs):
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hf = w.application.methods['hex-forward']
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for i in range(0, w.buffer.wordsize * 2):
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hf.execute(w, **vargs)
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class HexBackwardWord(Method):
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def _execute(self, w, **vargs):
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hb = w.application.methods['hex-backward']
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for i in range(0, w.buffer.wordsize * 2):
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hb.execute(w, **vargs)
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class HexStartOfLine(Method):
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'''Move the cursor to the start of the current hex line'''
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def _execute(self, w, **vargs):
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w.start_of_line()
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class HexEndOfLine(Method):
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'''Move the cursor to the end of the current hex line'''
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def _execute(self, w, **vargs):
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w.end_of_line()
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if w.cursor_char() == '\n':
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w.backward()
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class HexRead(Method):
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_is_method = False
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def __init__(self, type_, fmt):
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self.name = 'hex-read-%s' % type_.lower()
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self.type_ = type_
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self.fmt = fmt
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self.size = struct.calcsize(fmt)
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self.args = []
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self.help = "Read %r from address in the current buffer." % self.type_
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def _get_ix(self, b, cy, cx):
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ix = b.cursorx_to_datax(cy, cx)
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return ix
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def _execute(self, w, **vargs):
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b = w.buffer
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hb = w.application.methods['hex-backward']
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(cx, cy) = w.cursor.xy()
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ix = self._get_ix(b, cy, cx)
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addr = b.get_address(cy, 0) + ix
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try:
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v = w.mode.read_struct(cy, ix, self.fmt, self.size)
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if v is None:
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w.set_error("not enough data to read %s" % self.type_)
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else:
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end = '%s-endian' % w.mode.byteorder
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w.set_error("%s %s at 0x%08x: %r" % (end, self.type_, addr, v))
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except Exception, e:
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w.set_error("%s could not be read at 0x%08x" % (self.type_, addr))
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class HexReadAligned(HexRead):
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_is_method = False
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def __init__(self, type_, fmt):
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self.name = 'hex-read-aligned-%s' % type_.lower()
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self.type_ = type_
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self.fmt = fmt
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self.size = struct.calcsize(fmt)
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self.args = []
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self.help = "Read %r from word-aligned address in the current buffer." % self.type_
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def _get_ix(self, b, cy, cx):
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ix = b.cursorx_to_datax(cy, cx)
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ix -= ix % b.wordsize
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return ix
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class HexOverwriteChar(Method):
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_is_method = False
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def __init__(self, c):
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self.name = 'hex-overwrite-char-%s' % c
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self.args = []
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self.help = "Overwrite %r into the current hex buffer." % c
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self.char = c
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def _execute(self, w, **vargs):
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w.overwrite_char_at_cursor(self.char)
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end = w.buffer.get_buffer_end()
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while w.cursor_char().isspace() and w.cursor < end:
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w.forward()
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class ShowX86Instruction(Method):
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''''''
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size_re = re.compile(r'X86 insn \((\d+) bytes\):')
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def _execute(self, w, **vargs):
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disinst = w.application.config.get('hex.disinst')
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(cx, cy) = w.cursor.xy()
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ix = w.buffer.cursorx_to_datax(cy, cx)
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data = w.mode.read_data(cy, ix, 13)
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data = ''.join(['%02x' % ord(c) for c in data])
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try:
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p = Popen((disinst, data), stdout=PIPE, stderr=STDOUT)
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lines = [l.strip() for l in p.stdout.readlines()]
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result = p.wait()
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m = self.size_re.match(lines[0])
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assert m
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size = int(m.group(1))
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data = data[:size]
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w.set_error("%s %s" % (data, lines[1]))
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except Exception, e:
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w.set_error("there was an error")
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class GotoAddress(Method):
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'''Jump to the specified line number'''
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args = [Argument("address", type=type(0), prompt="Goto address: ")]
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def _execute(self, w, **vargs):
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b = w.buffer
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addr = vargs["address"]
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if addr < 0:
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w.set_error("Negative address not supported.")
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ix = addr % (b.groupsize * b.numgroups)
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cx = w.buffer.datax_to_cursorx(ix)
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cy = addr // (b.groupsize * b.numgroups)
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w.goto(Point(cx, cy))
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w.set_error("Goto 0x%08x (%r, %r)" % (addr, cx, cy))
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class ShowAddress(Method):
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'''Show the cursor's address in the current buffer'''
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def _execute(self, w, **vargs):
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(cx, cy) = w.cursor.xy()
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ix = w.buffer.cursorx_to_datax(cy, cx)
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addr = w.buffer.get_address(cy, ix)
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w.set_error("Cursor's address is 0x%08x" % addr)
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class Hex(mode.Fundamental):
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modename = 'Hex'
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config = {
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'hex.disinst': 'disinst',
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}
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lmargin = 12
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rmargin = 18
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_ctrans = ['.'] * 256
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byteorder = 'native'
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byteorders = {
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'native': '=',
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'little': '<',
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'big': '>',
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}
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cgreen = color.build('green', 'default', 'bold')
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ccyan = color.build('cyan', 'default', 'bold')
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ccursor = color.build('default', 'default', 'bold', 'reverse')
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for c in string.letters + string.digits + string.punctuation + ' ':
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_ctrans[ord(c)] = c
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ctrans = ''.join(_ctrans)
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actions = [HexForward, HexBackward, HexForwardWord, HexBackwardWord,
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HexStartOfLine, HexEndOfLine, ShowAddress, ShowX86Instruction,
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GotoAddress, HexSetByteOrder]
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def __init__(self, w):
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mode.Fundamental.__init__(self, w)
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self.bindings = {}
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self.add_bindings('center-view', ('C-l',))
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self.add_bindings('next-line', ('C-n', 'D_ARROW',))
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self.add_bindings('previous-line', ('C-p', 'U_ARROW',))
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self.add_bindings('next-section', ('M-n', 'M-D_ARROW',))
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self.add_bindings('previous-section', ('M-p', 'M-U_ARROW',))
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self.add_bindings('page-down', ('C-v', 'PG_DN',))
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self.add_bindings('page-up', ('M-v', 'PG_UP',))
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self.add_bindings('goto-beginning', ('M-<',))
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self.add_bindings('goto-end', ('M->',))
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self.add_bindings('right-word', ('M-f',))
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self.add_bindings('left-word', ('M-b',))
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self.add_bindings('set-mark', ('C-@',))
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self.add_bindings('switch-buffer', ('C-x b',))
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self.add_bindings('switch-mark', ('C-x C-x',))
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self.add_bindings('undo', ('C-/', 'C-x u',))
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self.add_bindings('redo', ('M-/', 'M-_', 'C-x r',))
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self.add_bindings('goto-line', ('M-g',))
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self.add_bindings('forward-chars', ('C-x M-c',))
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self.add_bindings('forward-lines', ('C-x M-n',))
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self.add_bindings('search', ('C-s',))
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self.add_bindings('reverse-search', ('C-r',))
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self.add_bindings('regex-search', ('M-C-s',))
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self.add_bindings('regex-reverse-search', ('M-C-r',))
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self.add_bindings('toggle-margins', ('M-m',))
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self.add_bindings('open-file', ('C-x C-f',))
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self.add_bindings('kill-buffer', ('C-x k',))
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self.add_bindings('list-buffers', ('C-x C-b',))
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self.add_bindings('meta-x', ('M-x',))
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self.add_bindings('save-buffer', ('C-x C-s',))
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self.add_bindings('save-buffer-as', ('C-x C-w',))
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self.add_bindings('exit', ('C-x C-c',))
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self.add_bindings('split-window', ('C-x s', 'C-x 2',))
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self.add_bindings('unsplit-window', ('C-u s', 'C-x 1',))
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self.add_bindings('toggle-window', ('C-x o',))
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self.add_bindings('open-console', ('M-e',))
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self.add_bindings('show-bindings-buffer', ('C-c M-h',))
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self.add_bindings('show-functions-buffer', ('C-c M-?',))
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self.add_bindings('which-command', ('M-h',))
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self.add_bindings('cmd-help-buffer', ('M-?',))
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self.add_bindings('set-mode', ('C-x m',))
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self.add_bindings('cancel', ('C-]',))
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self.add_bindings('exec', ('C-c e', 'C-c !'))
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self.add_bindings('grep', ('C-c g',))
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self.add_bindings('pipe', ('C-c p', 'C-c |'))
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self.add_bindings('view-buffer-parent', ('C-c .',))
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self.add_bindings('get-token', ('C-c t',))
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self.add_bindings('hex-forward', ('C-f', 'R_ARROW',))
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self.add_bindings('hex-backward', ('C-b', 'L_ARROW',))
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self.add_bindings('hex-forward-word', ('M-f', 'M-R_ARROW',))
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self.add_bindings('hex-backward-word', ('M-b', 'M-L_ARROW',))
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self.add_bindings('hex-start-of-line', ('C-a', 'HOME',))
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self.add_bindings('hex-end-of-line', ('C-e', 'END',))
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self.add_action_and_bindings(HexRead('char', 'b'), ('C-c b',))
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self.add_action_and_bindings(HexRead('uchar', 'B'), ('C-c B',))
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self.add_action_and_bindings(HexRead('short', 'h'), ('C-c h',))
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self.add_action_and_bindings(HexRead('ushort', 'H'), ('C-c H',))
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self.add_action_and_bindings(HexRead('int', 'i'), ('C-c i',))
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self.add_action_and_bindings(HexRead('uint', 'I'), ('C-c I',))
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self.add_action_and_bindings(HexRead('long', 'l'), ('C-c l',))
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self.add_action_and_bindings(HexRead('ulong', 'L'), ('C-c L',))
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self.add_action_and_bindings(HexRead('float', 'f'), ('C-c f',))
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self.add_action_and_bindings(HexRead('double', 'd'), ('C-c d',))
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self.add_action_and_bindings(HexReadAligned('char', 'b'), ('C-u b',))
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self.add_action_and_bindings(HexReadAligned('uchar', 'B'), ('C-u B',))
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self.add_action_and_bindings(HexReadAligned('short', 'h'), ('C-u h',))
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self.add_action_and_bindings(HexReadAligned('ushort', 'H'), ('C-u H',))
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self.add_action_and_bindings(HexReadAligned('int', 'i'), ('C-u i',))
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self.add_action_and_bindings(HexReadAligned('uint', 'I'), ('C-u I',))
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self.add_action_and_bindings(HexReadAligned('long', 'l'), ('C-u l',))
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self.add_action_and_bindings(HexReadAligned('ulong', 'L'), ('C-u L',))
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self.add_action_and_bindings(HexReadAligned('float', 'f'), ('C-u f',))
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self.add_action_and_bindings(HexReadAligned('double', 'd'), ('C-u d',))
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self.add_bindings('show-address', ('C-c a',))
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self.add_bindings('show-x86-instruction', ('C-c x',))
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self.add_bindings('goto-address', ('C-c M-g',))
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# create all the insert actions for the basic text input
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for c in string.letters + string.digits + string.punctuation:
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if c in string.hexdigits:
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self.add_action_and_bindings(HexOverwriteChar(c), (c,))
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def get_address(self, y, x):
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return (y * 16) + x
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def get_lmargin(self, y, x=0, ended=False, cont=False):
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lm = self.lmargin
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if ended:
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s = ' -------- '
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else:
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addr = self.get_address(y, x)
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s = '0x%08x ' % addr
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return ((0, s, self.ccyan),)
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def get_rmargin(self, y, x=0, ended=False, cont=False):
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if ended:
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return ((0, '', 0),)
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else:
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(cx, cy) = self.window.cursor.xy()
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s = string.translate(self.window.buffer.rawdata[y], self.ctrans)
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if cy == y:
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i = self.window.buffer.cursorx_to_datax(cy, cx)
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if i is None:
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rmargins = ((0, s, self.cgreen),)
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elif i < len(s):
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rmargins = ((0, s[0:i], self.cgreen),
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(i, s[i], self.ccursor),
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(i + 1, s[i+1:], self.cgreen))
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else:
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rmargins= ((0, s[0:i], self.cgreen),
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(i, s[i], self.cgreen),)
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return rmargins
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else:
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return ((0, s, self.cgreen),)
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def read_data(self, cy, ix, size):
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b = self.window.buffer
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s = b.rawdata[cy][ix:]
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if len(s) < size:
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if cy < len(b.rawdata) - 1:
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s += b.rawdata[cy + 1]
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s = s[:size]
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return s
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def read_struct(self, cy, ix, fmt, size):
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s = self.read_data(cy, ix, size)
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fmt = '%s%s' % (self.byteorders[self.byteorder], fmt)
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return struct.unpack(fmt, s)[0]
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install = Hex.install
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