mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-25 19:21:35 +01:00
qemu basic boots work, not tested extensively
This commit is contained in:
Ciro Santilli
13
common.py
13
common.py
@@ -60,8 +60,9 @@ def get_argparse(**kwargs):
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parser.add_argument(
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'-N', '--gem5-worktree',
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help="""\
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gem5 worktree to use for build and Python scripts at runtime.
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If not given, just use the submodule source.
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gem5 git worktree to use for build and Python scripts at runtime. Automatically
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create a new git worktree with the given id if one does not exist. If not
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given, just use the submodule source.
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"""
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)
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parser.add_argument(
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@@ -195,10 +196,10 @@ def setup(parser):
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def mkdir():
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global this
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os.makedirs(this.build_dir, exist_ok=True)
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os.mkdirs(this.gem5_out_dir, exit_ok=True)
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os.mkdirs(this.gem5_run_dir, exit_ok=True)
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os.mkdirs(this.qemu_run_dir, exit_ok=True)
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os.mkdirs(this.p9_dir, exit_ok=True)
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os.makedirs(this.gem5_out_dir, exist_ok=True)
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os.makedirs(this.gem5_run_dir, exist_ok=True)
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os.makedirs(this.qemu_run_dir, exist_ok=True)
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os.makedirs(this.p9_dir, exist_ok=True)
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# Default paths.
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root_dir = os.path.dirname(os.path.abspath(__file__))
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238
run
238
run
@@ -157,6 +157,7 @@ parser.add_argument(
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)
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args = common.setup(parser)
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# Common qemu / gem5 logic.
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# nokaslr:
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# * https://unix.stackexchange.com/questions/397939/turning-off-kaslr-to-debug-linux-kernel-using-qemu-and-gdb
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# * https://stackoverflow.com/questions/44612822/unable-to-debug-kernel-with-qemu-gdb/49840927#49840927
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@@ -164,25 +165,26 @@ args = common.setup(parser)
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kernel_cli_extra = 'console_msg_format=syslog nokaslr norandmaps panic=-1 printk.devkmsg=on printk.time=y'
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if args.kernel_cli_extra is not None:
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kernel_cli_extra += ' {}'.format(args.kernel_cli_extra)
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# Common qemu / gem5 logic.
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env = os.environ.copy()
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kernel_cli_extra_after_dash = ''
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extra_args_qemu = []
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extra_emulator_args = args.extra_emulator_args.copy()
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extra_qemu_args = []
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if args.debug_vm:
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debug_vm = ['gdb', '-q', '-ex', 'start', '--args']
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else:
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debug_vm = []
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if args.debug:
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extra_args_qemu.append('-S')
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extra_qemu_args.append('-S')
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if args.kernel_cli_extra_after_dash_base64 is not None:
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kernel_cli_extra_after_dash += ' lkmc_eval_base64="{}"'.format(base64.b64encode(args.kernel_cli_extra_after_dash_base64))
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if args.kernel_cli_extra_after_dash is not None:
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kernel_cli_extra_after_dash += ' {}'.format(args.kernel_cli_extra_after_dash)
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if args.kgdb:
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kernel_cli_extra += " kgdbwait"
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kernel_cli_extra += ' kgdbwait'
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if args.vnc:
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vnc = ['-vnc', ':0']
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else:
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vnc = []
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if args.initrd or args.initramfs:
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ramfs = True
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else:
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@@ -192,17 +194,15 @@ if args.eval is not None:
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initarg = 'rdinit'
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else:
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initarg = 'init'
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kernel_cli_extra += '{}=/eval_base64.sh'.format(initarg)
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kernel_cli_extra += ' {}=/eval_base64.sh'.format(initarg)
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kernel_cli_extra_after_dash += ' lkmc_eval="{}"'.format(base64.b64encode(args.eval))
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if not args.graphic:
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if args.arch == 'x86_64':
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kernel_cli_extra += ' console=ttyS0'
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extra_args_qemu.append('-nographic')
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extra_qemu_args.append('-nographic')
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if kernel_cli_extra_after_dash:
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kernel_cli_extra += " - {}".format(kernel_cli_extra_after_dash)
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kernel_cli_extra_after_dash
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# A dummy value that is already turned on by default and does not produce large output,
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# just to prevent QEMU from emitting a warning that '' is not valid.
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trace_type = 'pr_manager_run'
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@@ -265,134 +265,120 @@ if args.gem5:
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'--dtb-file', os.path.join(common.gem5_system_dir, 'arm', 'dt', 'armv{}_gem5_v1_{}cpu.dtb'.format(common.armv, args.cpus)),
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'--machine-type', 'VExpress_GEM5_V1',
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]
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#else
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# mkdir -p "common.run_dir"
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# if [ -z "$debug_vm" ]; then
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# serial_monitor="-serial mon:stdio \\
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#"
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# else
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# serial_monitor=
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# fi
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# if "$kvm"; then
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# extra_args="${extra_args}-enable-kvm \\
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#"
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# fi
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# if "$kgdb"; then
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# extra_args_qemu="${extra_args_qemu}-serial 'tcp::${common_gdb_port},server,nowait' \\
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#"
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# fi
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# if "$prebuilt"; then
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# common_mkdir
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# qemu_executable="qemu-system-${common_arch}"
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# else
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# qemu_executable="${common_qemu_exec}"
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# fi
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# extra_args="${extra_args_qemu}${extra_args}"
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# qemu_common="\
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#${debug_vm}\
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#${qemu_executable} \\
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#-device rtl8139,netdev=net0 \\
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#-gdb 'tcp::${common_gdb_port}' \\
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#-kernel '${common_linux_image}' \\
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#-m '${memory}' \\
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#-monitor 'telnet::${common_qemu_monitor_port},server,nowait' \\
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#-netdev 'user,hostfwd=tcp::${common_qemu_hostfwd_generic_port}-:${common_qemu_hostfwd_generic_port},hostfwd=tcp::${common_qemu_hostfwd_ssh_port}-:22,id=net0' \\
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#-no-reboot \\
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#${serial_monitor}\
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#-smp '${cpus}' \\
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#-trace 'enable=${trace_type},file=${common_run_dir}/trace.bin' \\
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#-virtfs 'local,path=${common_9p_dir},mount_tag=host_scratch,security_model=mapped,id=host_scratch' \\
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#-virtfs 'local,path=${common_buildroot_out_dir}/build,mount_tag=host_out,security_model=mapped,id=host_out' \\
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#${vnc}"
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# if "$initrd"; then
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# extra_args="${extra_args} -initrd '${common_images_dir}/rootfs.cpio' \\
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#"
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# fi
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#
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# # Disk related options.
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# if "$ramfs"; then
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# # TODO why is this needed, and why any string works.
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# root='root=/dev/anything'
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# else
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# if [ -n "$rr" ]; then
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# driveif=none
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# rrid=',id=img-direct'
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# root='root=/dev/sda'
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# snapshot=
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# else
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# driveif=virtio
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# root='root=/dev/vda'
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# rrid=
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# snapshot=,snapshot
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# fi
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# extra_args="${extra_args}-drive 'file=${common_qcow2_file},format=qcow2,if=${driveif}${snapshot}${rrid}' \\
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#"
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# if [ -n "$rr" ]; then
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# extra_args="${extra_args}\
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#-drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \\
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#-device ide-hd,drive=img-blkreplay \\
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#"
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# fi
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# fi
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#
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# if [ -n "$rr" ]; then
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# extra_args="${extra_args}\
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#-object filter-replay,id=replay,netdev=net0 \\
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#-icount 'shift=7,rr=${rr},rrfile=${common_qemu_rrfile}' \\
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#"
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# virtio_gpu_pci=
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# else
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# virtio_gpu_pci="-device virtio-gpu-pci \\
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#"
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# fi
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# case "args.arch" in
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# x86_64)
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# if "$kgdb"; then
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# kernel_cli_extra="${kernel_cli_extra} kgdboc=ttyS0,115200"
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# fi
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# cmd="\
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#${qemu_common}\
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#-M pc \\
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#-append '${root} nopat ${kernel_cli_extra}' \\
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#-device edu \\
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#"
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# ;;
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# arm|aarch64)
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# if "$kgdb"; then
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# kernel_cli_extra="${kernel_cli_extra} kgdboc=ttyAMA0,115200"
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# fi
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# if [ "args.arch" = arm ]; then
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# cpu=cortex-a15
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# else
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# cpu=cortex-a57
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# fi
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# # highmem=off needed since v3.0.0 due to:
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# # http://lists.nongnu.org/archive/html/qemu-discuss/2018-08/msg00034.html
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# cmd="\
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#${qemu_common}\
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#-M virt,highmem=off \\
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#-append '${root} ${kernel_cli_extra}' \\
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#-cpu "$cpu" \\
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#${virtio_gpu_pci}\
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#"
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# ;;
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# esac
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#fi
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else:
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os.makedirs(common.run_dir, exist_ok=True)
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if args.debug_vm:
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serial_monitor = []
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else:
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serial_monitor = ['-serial', 'mon:stdio']
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if args.kvm:
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extra_emulator_args.append('-enable-kvm')
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if args.kgdb:
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extra_qemu_args.extend(['-serial', 'tcp::{},server,nowait'.format(common.gdb_port)])
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if args.prebuilt:
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common.mkdir()
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qemu_executable = "qemu-system-{}".format(args.arch)
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else:
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qemu_executable = common.qemu_executable
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extra_emulator_args = extra_qemu_args + extra_emulator_args
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cmd = (
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debug_vm +
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[
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qemu_executable,
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'-device', 'rtl8139,netdev=net0',
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'-gdb', 'tcp::{}'.format(common.gdb_port),
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'-kernel', common.linux_image,
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'-m', args.memory,
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'-monitor', 'telnet::{},server,nowait'.format(common.qemu_monitor_port),
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'-netdev', 'user,hostfwd=tcp::{}-:{},hostfwd=tcp::{}-:22,id=net0'.format(common.qemu_hostfwd_generic_port, common.qemu_hostfwd_generic_port, common.qemu_hostfwd_ssh_port),
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'-no-reboot',
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'-smp', str(args.cpus),
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'-trace', 'enable={},file={}'.format(trace_type, os.path.join(common.run_dir, 'trace.bin')),
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'-virtfs', 'local,path={},mount_tag=host_scratch,security_model=mapped,id=host_scratch'.format(common.p9_dir),
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'-virtfs', 'local,path={},mount_tag=host_out,security_model=mapped,id=host_out'.format(common.build_dir),
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] +
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serial_monitor +
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vnc
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)
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if args.initrd:
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extra_emulator_args.extend(['-initrd', os.path.join(common.images_dir, 'rootfs.cpio')])
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rr = args.qemu_record or args.qemu_replay
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if ramfs:
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# TODO why is this needed, and why any string works.
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root = 'root=/dev/anything'
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else:
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if rr:
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driveif = 'none'
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rrid = ',id=img-direct'
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root = 'root=/dev/sda'
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snapshot = ''
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else:
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driveif = 'virtio'
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root = 'root=/dev/vda'
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rrid = ''
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snapshot = ',snapshot'
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extra_emulator_args.extend([
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'-drive',
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'file={},format=qcow2,if={}{}{}'.format(common.qcow2_file, driveif, snapshot, rrid)
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])
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if rr:
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extra_emulator_args.extend([
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'-drive', 'driver=blkreplay,if=none,image=img-direct,id=img-blkreplay',
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'-device', 'ide-hd,drive=img-blkreplay'
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])
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if rr:
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extra_emulator_args.extend([
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'-object', 'filter-replay,id=replay,netdev=net0',
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'-icount', 'shift=7,rr={},rrfile={}'.format('record' if args.qemu_record else 'replay', common.qemu_rrfile),
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])
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virtio_gpu_pci = []
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else:
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virtio_gpu_pci = ['-device', 'virtio-gpu-pci']
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if args.arch == 'x86_64':
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if args.kgdb:
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kernel_cli_extra += ' kgdboc=ttyS0,115200'
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cmd.extend([
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'-M', 'pc',
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'-append', '{} nopat {}'.format(root, kernel_cli_extra),
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'-device', 'edu',
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])
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elif args.arch == 'arm' or args.arch == 'aarch64':
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if args.kgdb:
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kernel_cli_extra += ' kgdboc=ttyAMA0,115200'
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if args.arch == 'arm':
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cpu = 'cortex-a15'
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else:
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cpu = 'cortex-a57'
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# highmem=off needed since v3.0.0 due to:
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# http://lists.nongnu.org/archive/html/qemu-discuss/2018-08/msg00034.html
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cmd = (
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cmd +
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[
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'-M', 'virt,highmem=off',
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'-append', '{} {}'.format(root, kernel_cli_extra),
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'-cpu', cpu,
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] +
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virtio_gpu_pci
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)
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cmd += extra_emulator_args
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print(' \\\n'.join(cmd))
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subprocess.check_output(cmd, env=env)
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try:
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subprocess.Popen(cmd, env=env).wait()
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except KeyboardInterrupt:
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pass
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#if args.tmux:
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# if args.gem5:
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# eval "./tmu 'sleep 2;./gem5-shell -n ${common_run_id} ${tmux_args};'"
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# elif args.debug:
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# eval "./tmu ./rungdb -a '${common_arch} -L ${common_linux_variant}' -n ${common_run_id} ${tmux_args}"
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# eval "./tmu ./rungdb -a '${args.arch} -L ${common_linux_variant}' -n ${common_run_id} ${tmux_args}"
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#if [ -n "${1:-}" ]; then
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# extra_args="${extra_args}${@} \\
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# extra_emulator_args="${extra_emulator_args}${@} \\
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#"
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#fi
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#cmd="time \\
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#${cmd}${extra_args}"
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#${cmd}${extra_emulator_args}"
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#if [ -z "$debug_vm" ]; then
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# cmd="${cmd}\
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#|& tee >(ts -s %.s > ${common_termout_file})\
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