forked from Mirror/pmbootstrap
f536fd9cb9
When using pmbootstrap, you usually select the device you want to work on using 'pmbootstrap init', generate the rootfs and can then run more commands in the context of the device. The same needs to be done before using QEMU (to generate the rootfs). But for some reason 'pmbootstrap qemu' requires setting the --arch parameter when running QEMU for a foreign architecture, even when the device is still selected in pmbootstrap. Even more confusing is that setting "--arch arm" always selects device-qemu-vexpress, but this is not immediately clear from the name. Let's make this a lot more intuitive by making sure there is a QEMU device selected when running 'pmbootstrap qemu'. We can then use the device information to infer the architecture automatically.
115 lines
3.3 KiB
Python
115 lines
3.3 KiB
Python
# Copyright 2020 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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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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"armel": "armv5-alpine-linux-musleabi",
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"armhf": "armv6-alpine-linux-musleabihf",
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"armv7": "armv7-alpine-linux-musleabihf",
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"mips": "mips-alpine-linux-musl",
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"mips64": "mips64-alpine-linux-musl",
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"mipsel": "mipsel-alpine-linux-musl",
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"mips64el": "mips64el-alpine-linux-musl",
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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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