mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-26 19:51:35 +01:00
build runs, lots of uncommented and lots of untested though
Refactor everything. Create nice submodules/ and packages/ folders.
This commit is contained in:
Ciro Santilli
309
build
309
build
@@ -2,6 +2,7 @@
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import multiprocessing
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import os
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import pathlib
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import shlex
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import subprocess
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import sys
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@@ -17,166 +18,206 @@ defaults = {
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'kernel_config': [],
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'kernel_config_fragment': [],
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'kernel_custom_config_file': None,
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'kernel_module_reconfigure': False,
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'linux_reconfigure': False,
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'nproc': None,
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'skip_configure': False,
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'qemu_reconfigure': False,
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'verbose': False,
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'extra_make_args': '',
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}
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def path_relative_to_buildroot(abspath):
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return os.path.relpath(abspath, common.buildroot_dir)
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def main(args, extra_args=None):
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global defaults
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args = common.resolve_args(defaults, args, extra_args)
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mkdir -p "${common_out_dir}"
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buildroot_configs = args.buildroot_config
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extra_make_args = args.extra_make_args
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os.makedirs(common.out_dir, exist_ok=True)
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extra_make_args = shlex.split(args.extra_make_args)
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if args.kernel_module_reconfigure:
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extra_make_args.append('kernel_module-reconfigure')
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if args.linux_reconfigure:
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extra_make_args.append('linux-reconfigure')
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if args.qemu_reconfigure:
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extra_make_args.append('host-qemu-reconfigure')
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if args.gem5:
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extra_make_args.append('gem5-reconfigure')
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if args.initramfs:
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buildroot_configs.extend([
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'BR2_TARGET_ROOTFS_CPIO=n',
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'BR2_TARGET_ROOTFS_EXT2=n',
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'BR2_TARGET_ROOTFS_INITRAMFS=y',
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])
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if args.initrd:
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buildroot_configs.extend([
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'BR2_TARGET_ROOTFS_CPIO=y',
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'BR2_TARGET_ROOTFS_EXT2=n'
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'BR2_TARGET_ROOTFS_INITRAMFS=n',
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])
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if args.nproc is None:
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nproc = multiprocessing.cpu_count()
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else:
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nproc = args.nproc
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if common.arch == 'x86_64':
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if args.arch == 'x86_64':
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defconfig = 'qemu_x86_64_defconfig'
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elif common.arch == 'arm':
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elif args.arch == 'arm':
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defconfig = 'qemu_arm_vexpress_defconfig'
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elif common.arch == 'aarch64':
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elif args.arch == 'aarch64':
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defconfig = 'qemu_aarch64_virt_defconfig'
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# TODO
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buildroot_config_fragments="${common_root_dir}/br2/default"
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args.buildroot_config_fragment
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args.kernel_config
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args.kernel_config_fragment
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config_fragments="${config_fragments} ${common_root_dir}/br2/qemu ${br2_cli_file}"
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time {
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# Configure.
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if "$configure"; then
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if ! cmp "${kernel_config_fragment_cli_file}" "${kernel_config_fragment_cli_file_tmp}"; then
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# Only copy if modified, otherwise the kernel always rebuilds.
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cp "${kernel_config_fragment_cli_file_tmp}" "${kernel_config_fragment_cli_file}"
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fi
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cd "${common_buildroot_dir}"
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for p in $(find "${common_root_dir}/patches/buildroot/" -maxdepth 1 -name '*.patch' -print); do
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patch -N -r - -p 1 < "$p" || :
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done
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br2_external='../kernel_module:../gem5:../parsec-benchmark'
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packages_dir="${common_root_dir}/packages"
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for package_dir in "${packages_dir}"/*/; do
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br2_external="${br2_external}:../packages/$(basename "${package_dir}")"
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done
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make O="$common_buildroot_out_dir" BR2_EXTERNAL="$br2_external" "$defconfig"
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# TODO Can't get rid of these for now.
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# http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
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for config_fragment in $config_fragments; do
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cat "$config_fragment" >> "$common.buildroot_config_file"
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done
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printf "
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BR2_JLEVEL=${j}
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BR2_DL_DIR=\"${common_dir}/dl\"
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" >> "$common.buildroot_config_file"
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if "$common_gem5"; then
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printf "BR2_PACKAGE_GEM5=y\n" >> "${common.buildroot_config_file}"
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fi
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kernel_config_fragment_dir=../kernel_config_fragment
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if [ -n "$linux_kernel_custom_config_file" ]; then
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if [ -f "$linux_kernel_custom_config_file" ]; then
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printf "BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y\nBR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE=\"${linux_kernel_custom_config_file}\"\n" >> "$common.buildroot_config_file"
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if "${linux_reconfigure}"; then
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touch "${linux_kernel_custom_config_file}"
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fi
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else
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echo "error: -K: file does not exist: ${linux_kernel_custom_config_file}" 1>&2
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exit 1
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fi
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default_config_fragments=
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else
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default_config_fragments="${kernel_config_fragment_dir}/min ${kernel_config_fragment_dir}/default ${kernel_config_fragment_dir}/display"
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fi
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printf "BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES=\"${default_config_fragments} ${kernel_config_fragments} ${kernel_config_fragment_cli_file}\"\n" >> "$common.buildroot_config_file"
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if "${linux_reconfigure}"; then
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# https://stackoverflow.com/questions/49260466/why-when-i-change-br2-linux-kernel-custom-config-file-and-run-make-linux-reconfi
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touch "${kernel_config_fragment_dir}/min"
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fi
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make O="$common_buildroot_out_dir" olddefconfig
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fi
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echo 'config time:'
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}
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echo
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if not args.skip_configure:
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# Initial make configure.
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#cd "${common_buildroot_dir}"
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#for p in $(find "${common_root_dir}/patches/buildroot/" -maxdepth 1 -name '*.patch' -print); do
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# patch -N -r - -p 1 < "$p" || :
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#done
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br2_external_dirs = []
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packages_dir = os.path.join(common.root_dir, 'packages')
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for package_dir in os.listdir(packages_dir):
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package_dir_abs = os.path.join(packages_dir, package_dir)
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if os.path.isdir(package_dir_abs):
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br2_external_dirs.append(path_relative_to_buildroot(package_dir_abs))
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br2_external_str = ':'.join(br2_external_dirs)
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subprocess.check_call(
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[
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'make',
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'O={}'.format(common.buildroot_out_dir),
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'BR2_EXTERNAL={}'.format(br2_external_str),
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defconfig,
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],
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cwd=common.buildroot_dir,
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)
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common_mkdir
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# Extra buildroot configs.
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buildroot_configs = args.buildroot_config
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buildroot_configs.extend([
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'BR2_JLEVEL={}'.format(nproc),
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'BR2_DL_DIR="{}"'.format(os.path.join(common.common_dir, 'dl')),
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'BR2_GLOBAL_PATCH_DIR="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'patches', 'global'))),
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'BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'busybox_config_fragment'))),
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'BR2_PACKAGE_OVERRIDE_FILE="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'buildroot_override'))),
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'BR2_ROOTFS_OVERLAY="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'rootfs_overlay'))),
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'BR2_ROOTFS_POST_BUILD_SCRIPT="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'rootfs_post_build_script'))),
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'BR2_ROOTFS_POST_IMAGE_SCRIPT="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'rootfs_post_image_script'))),
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'BR2_ROOTFS_USERS_TABLES="{}"'.format(
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path_relative_to_buildroot(os.path.join(common.root_dir, 'user_table'))),
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])
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# Manage Linux kernel and QEMU variants.
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symlink_buildroot_variant() (
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custom_dir="$1"
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variant_dir="$2"
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if [ -h "$custom_dir" ]; then
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rm "$custom_dir"
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elif [ -d "$custom_dir" ]; then
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# Migration for existing builds.
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mv "$custom_dir" "$variant_dir"
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fi
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mkdir -p "$variant_dir"
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ln -s "$variant_dir" "$custom_dir"
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if args.gem5:
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buildroot_configs.append('BR2_PACKAGE_GEM5=y')
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if args.initramfs:
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buildroot_configs.extend([
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'BR2_TARGET_ROOTFS_CPIO=n',
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'BR2_TARGET_ROOTFS_EXT2=n',
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'BR2_TARGET_ROOTFS_INITRAMFS=y',
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])
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if args.initrd:
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buildroot_configs.extend([
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'BR2_TARGET_ROOTFS_CPIO=y',
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'BR2_TARGET_ROOTFS_EXT2=n'
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'BR2_TARGET_ROOTFS_INITRAMFS=n',
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])
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buildroot_config_fragments = [
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os.path.join(common.root_dir, 'buildroot_config_fragments', 'default')
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] + args.buildroot_config_fragment
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# Decide kernel configuration.
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kernel_config_fragments = []
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if True:
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# CLI kernel configurations.
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kernel_config_fragment_cli_path = os.path.join(common.out_dir, 'kernel_config_fragment_cli')
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kernel_config_cli_str = '\n'.join(args.kernel_config)
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if os.path.exists(kernel_config_fragment_cli_path):
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with open(kernel_config_fragment_cli_path, 'r') as kernel_config_fragment_cli_file:
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kernel_config_cli_str_old = kernel_config_fragment_cli_file.read()
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if kernel_config_cli_str != kernel_config_cli_str_old:
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# Only update if modified, otherwise Buildroot rebuilds the
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# kernel always rebuilds kernel every time.
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do_write = True
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else:
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do_write = True
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with open(kernel_config_fragment_cli_path, 'w') as kernel_config_fragment_cli_file:
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kernel_config_fragment_cli_file.write(kernel_config_cli_str)
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kernel_config_fragments.append(os.path.join(kernel_config_fragment_cli_path))
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if True:
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# Kernel configuration fragments.
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kernel_config_fragment_dir = os.path.join('..', 'kernel_config_fragment')
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if args.kernel_custom_config_file is not None:
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if os.path.exists(args.kernel_custom_config_file):
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buildroot_configs.extend([
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'BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y',
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'BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE=\"{}\"'.format(args.kernel_custom_config_file),
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])
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if args.linux_reconfigure:
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pathlib.Path(args.kernel_custom_config_file).touch()
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else:
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raise Exception('Kernel config fragment file does not exist: {}'.format(args.kernel_custom_config_file))
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default_kernel_config_fragments = []
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else:
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default_kernel_config_fragments = ['min', 'default', 'display']
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if args.linux_reconfigure:
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# https://stackoverflow.com/questions/49260466/why-when-i-change-br2-linux-kernel-custom-config-file-and-run-make-linux-reconfi
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pathlib.Path(os.path.join(kernel_config_fragment_dir, 'min')).touch()
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for i, default_kernel_config_fragment in enumerate(default_kernel_config_fragments):
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default_kernel_config_fragments[i] = os.path.join(kernel_config_fragment_dir, default_kernel_config_fragment)
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kernel_config_fragments.extend(default_kernel_config_fragments)
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buildroot_kernel_config_fragment_str = 'BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{}"'.format(' '.join(kernel_config_fragments))
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buildroot_configs.append(buildroot_kernel_config_fragment_str)
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# Write extra configs into the Buildroot config file.
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# TODO Can't get rid of these for now with nice fragments:
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# http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
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with open(common.buildroot_config_file, 'a') as br2_config_file:
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for buildroot_config_fragment in buildroot_config_fragments:
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with open(buildroot_config_fragment, 'r') as br2_config_fragment:
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for line in br2_config_fragment:
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br2_config_file.write(line)
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for buildroot_config in buildroot_configs:
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br2_config_file.write(buildroot_config + '\n')
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subprocess.check_call(
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[
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'make',
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'O={}'.format(common.buildroot_out_dir),
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'olddefconfig',
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],
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cwd=common.buildroot_dir,
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)
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common.mkdir()
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## Manage Linux kernel and QEMU variants.
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#symlink_buildroot_variant() (
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# custom_dir="$1"
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# variant_dir="$2"
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# if [ -h "$custom_dir" ]; then
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# rm "$custom_dir"
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# elif [ -d "$custom_dir" ]; then
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# # Migration for existing builds.
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# mv "$custom_dir" "$variant_dir"
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# fi
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# mkdir -p "$variant_dir"
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# ln -s "$variant_dir" "$custom_dir"
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#)
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#symlink_buildroot_variant "$common_linux_build_dir" "$common_linux_variant_dir"
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#symlink_buildroot_variant "$common_qemu_build_dir" "$common_qemu_variant_dir"
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## TODO: this breaks the build. But then I noticed that it wouldn't make sense,
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## because this is a guest tool, and we don't have image variants yet. Some other day maybe.
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##symlink_buildroot_variant "$common_qemu_guest_build_dir" "$common_qemu_guest_variant_dir"
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## Manage gem5 variants.
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#if "$common_gem5"; then
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# if [ ! -e "${common_gem5_src_dir}/.git" ]; then
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# git -C "$common_gem5_default_src_dir" worktree add -b "wt/${common_gem5_variant}" "${common_gem5_src_dir}"
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# fi
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#fi
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return common.run_cmd(
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[
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'make',
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'O={}'.format(common.buildroot_out_dir),
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'V={}'.format(int(args.verbose)),
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] +
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extra_make_args +
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['all']
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,
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out_file=os.path.join(common.out_arch_dir, 'buildroot.log'),
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delete_env=['LD_LIBRARY_PATH'],
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cwd=common.buildroot_dir,
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)
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symlink_buildroot_variant "$common_linux_build_dir" "$common_linux_variant_dir"
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symlink_buildroot_variant "$common_qemu_build_dir" "$common_qemu_variant_dir"
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# TODO: this breaks the build. But then I noticed that it wouldn't make sense,
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# because this is a guest tool, and we don't have image variants yet. Some other day maybe.
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#symlink_buildroot_variant "$common_qemu_guest_build_dir" "$common_qemu_guest_variant_dir"
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# Manage gem5 variants.
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if "$common_gem5"; then
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if [ ! -e "${common_gem5_src_dir}/.git" ]; then
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git -C "$common_gem5_default_src_dir" worktree add -b "wt/${common_gem5_variant}" "${common_gem5_src_dir}"
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fi
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fi
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cd "$common_buildroot_dir"
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# HOST_QEMU_OPTS is a hack that happens to work because the QEMU package luckly uses += at all times.
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# It shouldn't be necessary in the first place: https://bugs.busybox.net/show_bug.cgi?id=9936
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#
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# Even if were an autotools package, there is no general way currently to pass extra configs to it:
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# https://stackoverflow.com/questions/44341188/how-to-pass-extra-custom-configure-autotools-options-to-a-buildroot-package/44341225#44341225
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#
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# BR2_ options may be given on the command line here, and they do have direct "define" effects.
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# But this is generally bad, as it skips the Kconfig mechanism, e.g. it does not set defaults properly.
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cmd="time \\
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env \\
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-u LD_LIBRARY_PATH \\
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make \\
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O='${common_buildroot_out_dir}' \\
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HOST_QEMU_OPTS='--enable-debug --enable-trace-backends=simple --enable-sdl --with-sdlabi=2.0' \\
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GEM5_LKMC_GEM5_BUILD_TYPE="$common_gem5_build_type" \\
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GEM5_LKMC_OUTDIR="$common_gem5_out_dir" \\
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GEM5_LKMC_SRCDIR="$common_gem5_src_dir" \\
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V='${v}' \\
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${extra_make_args} \
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all \\
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"
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"${common_root_dir}/eeval" "$cmd" "${common_out_arch_dir}/build.sh"
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return 0
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def get_argparse():
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parser = common.get_argparse(argparse_args={'description':'Run Linux on an emulator'})
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@@ -236,10 +277,6 @@ Still uses options explicitly passed with `-C` and `-c` on top of it.'''
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Touches kernel configuration files to overcome:
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https://stackoverflow.com/questions/49260466/why-when-i-change-br2-linux-kernel-custom-config-file-and-run-make-linux-reconfi'''
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)
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parser.add_argument(
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'-q', '--qemu-reconfigure', default=defaults['qemu_reconfigure'], action='store_true',
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help='Reconfigure and rebuild QEMU'
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)
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parser.add_argument(
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'-v', '--verbose', default=defaults['verbose'], action='store_true',
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help='Do a verbose build'
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