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83 lines
3.0 KiB
Python
83 lines
3.0 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import argparse
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import gdb
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import pwndbg.arch
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import pwndbg.commands
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import pwndbg.config
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import pwndbg.hexdump
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import pwndbg.memory
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import pwndbg.regs
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pwndbg.config.Parameter('hexdump-width',
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16,
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'line width of hexdump command')
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pwndbg.config.Parameter('hexdump-bytes',
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64,
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'number of bytes printed by hexdump command')
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pwndbg.config.Parameter('hexdump-group-width',
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4,
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"number of bytes grouped in hexdump command (If -1, the architecture's pointer size is used)")
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pwndbg.config.Parameter('hexdump-group-use-big-endian',
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False,
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'Use big-endian within each group of bytes. Only applies to raw bytes, not the ASCII part. '
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'See also hexdump-highlight-group-lsb.')
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def address_or_module_name(s):
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gdbval_or_str = pwndbg.commands.sloppy_gdb_parse(s)
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if isinstance(gdbval_or_str, str):
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module_name = gdbval_or_str
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pages = list(filter(lambda page: module_name in page.objfile, pwndbg.vmmap.get()))
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if pages:
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return pages[0].vaddr
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else:
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raise argparse.ArgumentError('Could not find pages for module %s' % module_name)
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elif isinstance(gdbval_or_str, (int, gdb.Value)):
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addr = gdbval_or_str
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return addr
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else:
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raise argparse.ArgumentTypeError('Unknown hexdump argument type.')
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parser = argparse.ArgumentParser(description='Hexdumps data at the specified address or module name (or at $sp)')
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parser.add_argument('address', type=address_or_module_name, nargs='?', default='$sp',
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help='Address or module name to dump')
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parser.add_argument('count', nargs='?', default=pwndbg.config.hexdump_bytes,
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help='Number of bytes to dump')
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@pwndbg.commands.ArgparsedCommand(parser)
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@pwndbg.commands.OnlyWhenRunning
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def hexdump(address=None, count=pwndbg.config.hexdump_bytes):
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if hexdump.repeat:
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address = hexdump.last_address
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hexdump.offset += 1
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else:
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hexdump.offset = 0
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address = int(address)
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address &= pwndbg.arch.ptrmask
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count = max(int(count), 0)
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width = int(pwndbg.config.hexdump_width)
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group_width = int(pwndbg.config.hexdump_group_width)
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group_width = pwndbg.typeinfo.ptrsize if group_width == -1 else group_width
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flip_group_endianess = pwndbg.config.hexdump_group_use_big_endian and pwndbg.arch.endian == 'little'
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if count > address > 0x10000:
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count -= address
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try:
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data = pwndbg.memory.read(address, count, partial=True)
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hexdump.last_address = (address + count)
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except gdb.error as e:
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print(e)
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return
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for i, line in enumerate(pwndbg.hexdump.hexdump(data, address=address, width=width, group_width=group_width, flip_group_endianess=flip_group_endianess, offset=hexdump.offset)):
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print(line)
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hexdump.offset += i
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hexdump.last_address = 0
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hexdump.offset = 0
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