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