179 lines
5.0 KiB
Python
179 lines
5.0 KiB
Python
"""
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Copyright 2019 Oliver Smith
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This file is part of pmbootstrap.
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pmbootstrap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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pmbootstrap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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import platform
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import fnmatch
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def alpine_native():
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machine = platform.machine()
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ret = ""
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mapping = {
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"i686": "x86",
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"x86_64": "x86_64",
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"aarch64": "aarch64",
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"armv6l": "armhf",
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"armv7l": "armv7"
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}
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if machine in mapping:
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return mapping[machine]
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raise ValueError("Can not map platform.machine '" + machine + "'"
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" to the right Alpine Linux architecture")
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return ret
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def from_chroot_suffix(args, suffix):
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if suffix == "native":
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return args.arch_native
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if suffix == "rootfs_" + args.device:
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return args.deviceinfo["arch"]
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if suffix.startswith("buildroot_"):
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return suffix.split("_", 1)[1]
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raise ValueError("Invalid chroot suffix: " + suffix +
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" (wrong device chosen in 'init' step?)")
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def alpine_to_qemu(arch):
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"""
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Convert the architecture to the string used in the QEMU packaging.
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"""
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mapping = {
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"x86": "i386",
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"x86_64": "x86_64",
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"armhf": "arm",
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"armv7": "arm",
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"aarch64": "aarch64",
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}
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for pattern, arch_qemu in mapping.items():
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if fnmatch.fnmatch(arch, pattern):
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return arch_qemu
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raise ValueError("Can not map Alpine architecture '" + arch + "'"
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" to the right Debian architecture.")
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def alpine_to_kernel(arch):
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"""
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Convert the architecture to the string used inside the kernel sources.
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You can read the mapping from the linux-vanilla APKBUILD for example.
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"""
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mapping = {
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"aarch64*": "arm64",
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"arm*": "arm",
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"ppc*": "powerpc",
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"s390*": "s390"
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}
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for pattern, arch_kernel in mapping.items():
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if fnmatch.fnmatch(arch, pattern):
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return arch_kernel
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return arch
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def alpine_to_hostspec(arch):
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"""
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See: abuild source code/functions.sh.in: arch_to_hostspec()
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"""
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mapping = {
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"aarch64": "aarch64-alpine-linux-musl",
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"armhf": "armv6-alpine-linux-muslgnueabihf",
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"armv7": "armv7-alpine-linux-musleabihf",
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"ppc": "powerpc-alpine-linux-musl",
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"ppc64": "powerpc64-alpine-linux-musl",
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"ppc64le": "powerpc64le-alpine-linux-musl",
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"s390x": "s390x-alpine-linux-musl",
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"x86": "i586-alpine-linux-musl",
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"x86_64": "x86_64-alpine-linux-musl",
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}
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if arch in mapping:
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return mapping[arch]
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raise ValueError("Can not map Alpine architecture '" + arch + "'"
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" to the right hostspec value")
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def cpu_emulation_required(args, arch):
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# Obvious case: host arch is target arch
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if args.arch_native == arch:
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return False
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# Other cases: host arch on the left, target archs on the right
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not_required = {
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"x86_64": ["x86"],
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"aarch64": ["armel", "armhf", "armv7"],
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}
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if args.arch_native in not_required:
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if arch in not_required[args.arch_native]:
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return False
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# No match: then it's required
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return True
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def uname_to_qemu(arch):
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"""
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Convert the most common architectures returned by 'uname' to those
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used by the QEMU binary
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"""
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mapping = {
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"aarch64": "aarch64",
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"arm": "arm",
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"armeb": "arm",
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"armel": "arm",
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"armhf": "arm",
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"armv7l": "arm",
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"x86_64": "x86_64",
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"amd64": "x86_64",
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}
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if arch in mapping:
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return mapping[arch]
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raise ValueError("Can not map host architecture '" + arch + "'"
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" to the right QEMU value")
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def qemu_to_pmos_device(arch):
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"""
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Convert the architecture used in the QEMU binary to the aport name in
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postmarketOS defining the device
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"""
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mapping = {
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"arm": "qemu-vexpress",
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"aarch64": "qemu-aarch64",
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"x86_64": "qemu-amd64",
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}
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if arch in mapping:
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return mapping[arch]
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raise ValueError("Can not map QEMU value '" + arch + "'"
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" to the right postmarketOS device")
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def qemu_check_device(device, arch):
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"""
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Check whether a device has a specific architecture.
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Examples:
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qemu_check_device("qemu-amd64", "x86_64") is True
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qemu_check_device("qemu-vexpress", "armel") is True
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qemu_check_device("qemu-vexpress", "aarch64") is False
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"""
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arch_qemu = uname_to_qemu(arch)
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return device == qemu_to_pmos_device(arch_qemu)
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