linux-kernel-module-cheat/run-gdb-user

#!/usr/bin/env python3

import imp
import os
import sys

import common
rungdb = imp.load_source('run_gdb', os.path.join(kwargs['root_dir'], 'run-gdb'))

parser = self.get_argparse(argparse_args={
    'description': '''GDB step debug guest userland processes without gdbserver.

More information at: https://github.com/cirosantilli/linux-kernel-module-cheat#gdb-step-debug-userland-processes
'''
})
parser.add_argument(
    'executable',
    help='Path to the executable to be debugged relative to the Buildroot build directory.'
)
parser.add_argument(
    'break_at',
    default=None,
    help='Break at this point, e.g. main.',
    nargs='?'
)
args = self.setup(parser)
executable = self.resolve_userland(kwargs['executable'])
addr = self.get_elf_entry(os.path.join(kwargs['buildroot_build_build_dir'], executable))
extra_args = {}
extra_args['before'] = '-ex \"add-symbol-file {} {}\"'.format(executable, hex(addr))
# Or else lx-symbols throws for arm:
# gdb.MemoryError: Cannot access memory at address 0xbf0040cc
# TODO understand better.
# Also, lx-symbols overrides the add-symbol-file commands.
extra_args['no_lxsymbols'] = True
extra_args['break_at'] = kwargs['break_at']
sys.exit(rungdb.main(args, extra_args))