373 lines
9.5 KiB
Python
373 lines
9.5 KiB
Python
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#!/usr/bin/python
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# A copy of some necessary parts from yum.rpmUtils.arch, with slightly changes:
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# 1. _ppc64_native_is_best changed to True
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# 2. code style fixes for flake8 reported errors
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import os
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import rpm
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import ctypes
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import struct
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# _ppc64_native_is_best is False in yum's source code, but patched with a
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# separate patch when built from source rpm, so we set it to True here.
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_ppc64_native_is_best = True
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# dict mapping arch -> ( multicompat, best personality, biarch personality )
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multilibArches = {"x86_64": ("athlon", "x86_64", "athlon"),
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"sparc64v": ("sparcv9v", "sparcv9v", "sparc64v"),
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"sparc64": ("sparcv9", "sparcv9", "sparc64"),
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"ppc64": ("ppc", "ppc", "ppc64"),
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"s390x": ("s390", "s390x", "s390"),
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}
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if _ppc64_native_is_best:
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multilibArches["ppc64"] = ("ppc", "ppc64", "ppc64")
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arches = {
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# ia32
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"athlon": "i686",
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"i686": "i586",
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"geode": "i586",
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"i586": "i486",
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"i486": "i386",
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"i386": "noarch",
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# amd64
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"x86_64": "athlon",
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"amd64": "x86_64",
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"ia32e": "x86_64",
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# ppc64le
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"ppc64le": "noarch",
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# ppc
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"ppc64p7": "ppc64",
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"ppc64pseries": "ppc64",
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"ppc64iseries": "ppc64",
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"ppc64": "ppc",
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"ppc": "noarch",
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# s390{,x}
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"s390x": "s390",
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"s390": "noarch",
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# sparc
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"sparc64v": "sparcv9v",
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"sparc64": "sparcv9",
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"sparcv9v": "sparcv9",
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"sparcv9": "sparcv8",
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"sparcv8": "sparc",
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"sparc": "noarch",
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# alpha
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"alphaev7": "alphaev68",
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"alphaev68": "alphaev67",
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"alphaev67": "alphaev6",
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"alphaev6": "alphapca56",
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"alphapca56": "alphaev56",
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"alphaev56": "alphaev5",
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"alphaev5": "alphaev45",
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"alphaev45": "alphaev4",
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"alphaev4": "alpha",
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"alpha": "noarch",
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# arm
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"armv7l": "armv6l",
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"armv6l": "armv5tejl",
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"armv5tejl": "armv5tel",
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"armv5tel": "noarch",
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# arm hardware floating point
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"armv7hnl": "armv7hl",
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"armv7hl": "armv6hl",
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"armv6hl": "noarch",
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# arm64
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"arm64": "noarch",
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# aarch64
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"aarch64": "noarch",
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# super-h
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"sh4a": "sh4",
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"sh4": "noarch",
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"sh3": "noarch",
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# itanium
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"ia64": "noarch",
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}
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# Will contain information parsed from /proc/self/auxv via _parse_auxv().
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# Should move into rpm really.
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_aux_vector = {
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"platform": "",
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"hwcap": 0,
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}
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def isMultiLibArch(arch=None): # pragma: no cover
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"""returns true if arch is a multilib arch, false if not"""
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if arch is None:
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arch = canonArch
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if arch not in arches: # or we could check if it is noarch
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return 0
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if arch in multilibArches:
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return 1
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if arches[arch] in multilibArches:
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return 1
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return 0
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def getArchList(thisarch=None): # pragma: no cover
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# this returns a list of archs that are compatible with arch given
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if not thisarch:
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thisarch = canonArch
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archlist = [thisarch]
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while thisarch in arches:
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thisarch = arches[thisarch]
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archlist.append(thisarch)
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# hack hack hack
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# sparc64v is also sparc64 compat
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if archlist[0] == "sparc64v":
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archlist.insert(1, "sparc64")
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# if we're a weirdo arch - add noarch on there.
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if len(archlist) == 1 and archlist[0] == thisarch:
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archlist.append('noarch')
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return archlist
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def _try_read_cpuinfo(): # pragma: no cover
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""" Try to read /proc/cpuinfo ... if we can't ignore errors (ie. proc not
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mounted). """
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try:
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return open("/proc/cpuinfo", "r")
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except:
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return []
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def _parse_auxv(): # pragma: no cover
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""" Read /proc/self/auxv and parse it into global dict for easier access
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later on, very similar to what rpm does. """
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# In case we can't open and read /proc/self/auxv, just return
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try:
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data = open("/proc/self/auxv", "rb").read()
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except:
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return
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# Define values from /usr/include/elf.h
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AT_PLATFORM = 15
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AT_HWCAP = 16
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fmtlen = struct.calcsize("LL")
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offset = 0
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platform = ctypes.c_char_p()
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# Parse the data and fill in _aux_vector dict
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while offset <= len(data) - fmtlen:
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at_type, at_val = struct.unpack_from("LL", data, offset)
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if at_type == AT_PLATFORM:
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platform.value = at_val
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_aux_vector["platform"] = platform.value
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if at_type == AT_HWCAP:
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_aux_vector["hwcap"] = at_val
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offset = offset + fmtlen
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def getCanonX86Arch(arch): # pragma: no cover
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if arch == "i586":
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for line in _try_read_cpuinfo():
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if line.startswith("model name"):
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if line.find("Geode(TM)") != -1:
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return "geode"
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break
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return arch
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# only athlon vs i686 isn't handled with uname currently
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if arch != "i686":
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return arch
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# if we're i686 and AuthenticAMD, then we should be an athlon
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for line in _try_read_cpuinfo():
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if line.startswith("vendor") and line.find("AuthenticAMD") != -1:
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return "athlon"
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# i686 doesn't guarantee cmov, but we depend on it
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elif line.startswith("flags"):
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if line.find("cmov") == -1:
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return "i586"
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break
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return arch
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def getCanonARMArch(arch): # pragma: no cover
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# the %{_target_arch} macro in rpm will let us know the abi we are using
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target = rpm.expandMacro('%{_target_cpu}')
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if target.startswith('armv6h'):
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return target
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if target.startswith('armv7h'):
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return target
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return arch
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def getCanonPPCArch(arch): # pragma: no cover
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# FIXME: should I do better handling for mac, etc?
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if arch != "ppc64":
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return arch
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machine = None
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for line in _try_read_cpuinfo():
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if line.find("machine") != -1:
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machine = line.split(':')[1]
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break
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platform = _aux_vector["platform"]
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if machine is None and not platform:
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return arch
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try:
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if platform.startswith("power") and int(platform[5:].rstrip('+')) >= 7:
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return "ppc64p7"
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except:
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pass
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if machine is None:
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return arch
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if machine.find("CHRP IBM") != -1:
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return "ppc64pseries"
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if machine.find("iSeries") != -1:
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return "ppc64iseries"
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return arch
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def getCanonSPARCArch(arch): # pragma: no cover
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# Deal with sun4v, sun4u, sun4m cases
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SPARCtype = None
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for line in _try_read_cpuinfo():
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if line.startswith("type"):
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SPARCtype = line.split(':')[1]
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break
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if SPARCtype is None:
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return arch
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if SPARCtype.find("sun4v") != -1:
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if arch.startswith("sparc64"):
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return "sparc64v"
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else:
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return "sparcv9v"
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if SPARCtype.find("sun4u") != -1:
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if arch.startswith("sparc64"):
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return "sparc64"
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else:
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return "sparcv9"
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if SPARCtype.find("sun4m") != -1:
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return "sparcv8"
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return arch
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def getCanonX86_64Arch(arch): # pragma: no cover
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if arch != "x86_64":
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return arch
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vendor = None
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for line in _try_read_cpuinfo():
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if line.startswith("vendor_id"):
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vendor = line.split(':')[1]
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break
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if vendor is None:
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return arch
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if vendor.find("Authentic AMD") != -1 or vendor.find("AuthenticAMD") != -1:
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return "amd64"
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if vendor.find("GenuineIntel") != -1:
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return "ia32e"
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return arch
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def getCanonArch(skipRpmPlatform=0): # pragma: no cover
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if not skipRpmPlatform and os.access("/etc/rpm/platform", os.R_OK):
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try:
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f = open("/etc/rpm/platform", "r")
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line = f.readline()
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f.close()
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(arch, vendor, opersys) = line.split("-", 2)
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return arch
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except:
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pass
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arch = os.uname()[4]
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_parse_auxv()
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if (len(arch) == 4 and arch[0] == "i" and arch[2:4] == "86"):
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return getCanonX86Arch(arch)
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if arch.startswith("arm"):
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return getCanonARMArch(arch)
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if arch.startswith("ppc"):
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return getCanonPPCArch(arch)
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if arch.startswith("sparc"):
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return getCanonSPARCArch(arch)
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if arch == "x86_64":
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return getCanonX86_64Arch(arch)
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return arch
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canonArch = getCanonArch()
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# this gets you the "compat" arch of a biarch pair
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def getMultiArchInfo(arch=canonArch): # pragma: no cover
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if arch in multilibArches:
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return multilibArches[arch]
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if arch in arches and arches[arch] != "noarch":
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return getMultiArchInfo(arch=arches[arch])
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return None
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def getBaseArch(myarch=None): # pragma: no cover
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"""returns 'base' arch for myarch, if specified, or canonArch if not.
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base arch is the arch before noarch in the arches dict if myarch is not
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a key in the multilibArches."""
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if not myarch:
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myarch = canonArch
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if myarch not in arches: # this is dumb, but <shrug>
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return myarch
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if myarch.startswith("sparc64"):
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return "sparc"
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elif myarch == "ppc64le":
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return "ppc64le"
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elif myarch.startswith("ppc64") and not _ppc64_native_is_best:
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return "ppc"
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elif myarch.startswith("arm64"):
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return "arm64"
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elif myarch.startswith("armv6h"):
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return "armhfp"
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elif myarch.startswith("armv7h"):
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return "armhfp"
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elif myarch.startswith("arm"):
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return "arm"
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if isMultiLibArch(arch=myarch):
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if myarch in multilibArches:
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return myarch
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else:
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return arches[myarch]
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if myarch in arches:
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basearch = myarch
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value = arches[basearch]
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while value != 'noarch':
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basearch = value
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value = arches[basearch]
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return basearch
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