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https://github.com/cirosantilli/linux-kernel-module-cheat.git
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preparing for tmux and gdb
This commit is contained in:
Ciro Santilli
174
rungdb
174
rungdb
@@ -1,87 +1,87 @@
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#!/usr/bin/env bash
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. "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common"
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after=
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before=
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lx_symbols="-ex 'lx-symbols ../kernel_module-1.0/' \\
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"
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kgdb=false
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docontinue=true
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while getopts "A:a:b:CgkL:n:X${common_getopts_flags}" OPT; do
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case "$OPT" in
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A)
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after="$OPTARG"
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;;
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b)
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before="$OPTARG"
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;;
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C)
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# No Continue.
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docontinue=false
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;;
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k)
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kgdb=true
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;;
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X)
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lx_symbols=
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;;
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?)
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common_getopts_case "$OPT"
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;;
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esac
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done
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shift "$(($OPTIND - 1))"
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if [ "$#" -gt 0 ]; then
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brk="-ex 'break ${1}' \\
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"
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shift
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else
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brk=
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fi
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common_setup
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gdb="${common_host_dir}/usr/bin/${common_arch}-linux-gdb \\
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${before}"
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if "$kgdb"; then
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cmd="\
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${gdb}\
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-q \\
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-ex 'add-auto-load-safe-path $(pwd)' \\
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-ex 'file vmlinux' \\
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-ex 'target remote localhost:${common_gdb_port}' \\
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"
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else
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# ## lx-symbols
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#
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# ### lx-symbols after continue
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#
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# lx symbols must be run after continue.
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#
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# running it immediately after the connect on the bootloader leads to failure,
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# likely because kernel structure on which it depends are not yet available.
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#
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# With this setup, continue runs, and lx-symbols only runs when a break happens,
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# either by hitting the breakpoint, or by entering Ctrl + C.
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#
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# Sure, if the user sets a break on a raw address of the bootloader,
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# problems will still arise, but let's think about that some other time.
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#
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# ### lx-symbols autoload
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#
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# The lx-symbols commands gets loaded through the file vmlinux-gdb.py
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# which gets put on the kernel build root when python debugging scripts are enabled.
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cmd="\
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${gdb}\
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-q \\
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-ex 'add-auto-load-safe-path $(pwd)' \\
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-ex 'file vmlinux' \\
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-ex 'target remote localhost:${common_gdb_port}' \\
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${brk}\
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"
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fi
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if "$docontinue"; then
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cmd="${cmd}\
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-ex continue \\
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${lx_symbols}\
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"
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fi
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"${common_root_dir}/eeval" "cd '${common_linux_variant_dir}' && \\
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$cmd $after" "${common_run_dir}/rungdb.sh"
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#!/usr/bin/env python3
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import os
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import shlex
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import signal
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import subprocess
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import common
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parser = common.get_argparse(description='Connect with GDB to an emulator to debug Linux itself')
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parser.add_argument(
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'-A', '--after', default='',
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help='Pass extra arguments to GDB, to be appended after all other arguments'
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)
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parser.add_argument(
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'-b', '--before', default='',
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help='Pass extra arguments to GDB to be prepended before any of the arguments passed by this script'
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)
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parser.add_argument(
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'-C', '--no-continue', default=False, action='store_true',
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help="Don't run continue after connecting"
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)
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parser.add_argument(
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'-k', '--kgdb', default=False, action='store_true'
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)
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parser.add_argument(
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'-X', '--no-lxsymbols', default=False, action='store_true'
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)
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parser.add_argument(
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'break_at', nargs='?',
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help='Extra options to append at the end of the emulator command line'
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)
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args = common.setup(parser)
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after = shlex.split(args.after)
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before = shlex.split(args.before)
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if args.no_lxsymbols:
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lx_symbols = []
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else:
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lx_symbols = ['-ex', 'lx-symbols ../kernel_module-1.0/']
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if args.break_at is not None:
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break_at = ['-ex', 'break {}'.format(args.break_at)]
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else:
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break_at = []
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cmd = (
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[
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os.path.join(common.host_bin_dir,
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'{}-linux-gdb'.format(args.arch))
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] +
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before +
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[
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'-q',
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'-ex', 'add-auto-load-safe-path {}'.format(common.linux_variant_dir),
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'-ex', 'file {}'.format(common.vmlinux),
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'-ex', 'target remote localhost:{}'.format(common.gdb_port),
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]
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)
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if not args.kgdb:
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cmd.extend(break_at)
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if not args.no_continue:
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# ## lx-symbols
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#
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# ### lx-symbols after continue
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#
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# lx symbols must be run after continue.
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#
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# running it immediately after the connect on the bootloader leads to failure,
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# likely because kernel structure on which it depends are not yet available.
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#
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# With this setup, continue runs, and lx-symbols only runs when a break happens,
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# either by hitting the breakpoint, or by entering Ctrl + C.
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#
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# Sure, if the user sets a break on a raw address of the bootloader,
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# problems will still arise, but let's think about that some other time.
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#
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# ### lx-symbols autoload
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#
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# The lx-symbols commands gets loaded through the file vmlinux-gdb.py
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# which gets put on the kernel build root when python debugging scripts are enabled.
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cmd.extend(['-ex', 'continue'] + lx_symbols)
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cmd.extend(after)
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common.print_cmd(cmd)
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# TODO eeval
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# "${common.root_dir}/eeval" "$cmd $after" "${common.run_dir}/rungdb.sh"
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def signal_handler(sig, frame): pass
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signal.signal(signal.SIGINT, signal_handler)
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subprocess.Popen(cmd, cwd=common.linux_variant_dir).wait()
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