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# Copyright 2015-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
#
# Compute a multilib category, as discussed here:
#
# https://bugs.gentoo.org/show_bug.cgi?id=534206
#
# Supported categories:
#
# alpha_{32,64}
# arm_{32,64}
# hppa_{32,64}
# ia_{32,64}
# loong_{ilp32s,ilp32f,ilp32d,lp64s,lp64f,lp64d}
# m68k_{32,64}
# mips_{eabi32,eabi64,n32,n64,o32,o64}
# ppc_{32,64}
# riscv_{ilp32,ilp32d,lp64,lp64d}
# s390_{32,64}
# sh_{32,64}
# sparc_{32,64}
# x86_{32,64,x32}
#
# NOTES:
#
# * The ABIs referenced by some of the above *_32 and *_64 categories
# may be imaginary, but they are listed anyway, since the goal is to
# establish a naming convention that is as consistent and uniform as
# possible.
#
# * The Elf header's e_ident[EI_OSABI] byte is completely ignored,
# since OS-independence is one of the goals. The assumption is that,
# for given installation, we are only interested in tracking multilib
# ABIs for a single OS.
from portage.util.elf.constants import (
EF_MIPS_ABI,
EF_MIPS_ABI2,
EF_RISCV_FLOAT_ABI_DOUBLE,
EF_RISCV_RVC,
EF_LOONGARCH_ABI_LP64_SOFT_FLOAT,
EF_LOONGARCH_ABI_LP64_SINGLE_FLOAT,
EF_LOONGARCH_ABI_LP64_DOUBLE_FLOAT,
EF_LOONGARCH_ABI_ILP32_SOFT_FLOAT,
EF_LOONGARCH_ABI_ILP32_SINGLE_FLOAT,
EF_LOONGARCH_ABI_ILP32_DOUBLE_FLOAT,
EF_LOONGARCH_ABI_MASK,
ELFCLASS32,
ELFCLASS64,
EM_386,
EM_68K,
EM_AARCH64,
EM_ALPHA,
EM_AMDGPU,
EM_ARC,
EM_ARC_COMPACT,
EM_ARC_COMPACT2,
EM_ARC_COMPACT3,
EM_ARC_COMPACT3_64,
EM_ARM,
EM_ALTERA_NIOS2,
EM_IA_64,
EM_LOONGARCH,
EM_MIPS,
EM_PARISC,
EM_PPC,
EM_PPC64,
EM_RISCV,
EM_S390,
EM_SH,
EM_SPARC,
EM_SPARC32PLUS,
EM_SPARCV9,
EM_X86_64,
E_MIPS_ABI_EABI32,
E_MIPS_ABI_EABI64,
E_MIPS_ABI_O32,
E_MIPS_ABI_O64,
)
_machine_prefix_map = {
EM_386: "x86",
EM_68K: "m68k",
EM_AARCH64: "arm",
EM_ALPHA: "alpha",
EM_AMDGPU: "amdgpu",
EM_ALTERA_NIOS2: "nios2",
EM_ARC: "arc",
EM_ARC_COMPACT: "arc",
EM_ARC_COMPACT2: "arc",
EM_ARC_COMPACT3: "arc",
EM_ARC_COMPACT3_64: "arc",
EM_ARM: "arm",
EM_IA_64: "ia64",
EM_LOONGARCH: "loong",
EM_MIPS: "mips",
EM_PARISC: "hppa",
EM_PPC: "ppc",
EM_PPC64: "ppc",
EM_RISCV: "riscv",
EM_S390: "s390",
EM_SH: "sh",
EM_SPARC: "sparc",
EM_SPARC32PLUS: "sparc",
EM_SPARCV9: "sparc",
EM_X86_64: "x86",
}
_loong_abi_map = {
EF_LOONGARCH_ABI_LP64_SOFT_FLOAT: "lp64s",
EF_LOONGARCH_ABI_LP64_SINGLE_FLOAT: "lp64f",
EF_LOONGARCH_ABI_LP64_DOUBLE_FLOAT: "lp64d",
EF_LOONGARCH_ABI_ILP32_SOFT_FLOAT: "ilp32s",
EF_LOONGARCH_ABI_ILP32_SINGLE_FLOAT: "ilp32f",
EF_LOONGARCH_ABI_ILP32_DOUBLE_FLOAT: "ilp32d",
}
_mips_abi_map = {
E_MIPS_ABI_EABI32: "eabi32",
E_MIPS_ABI_EABI64: "eabi64",
E_MIPS_ABI_O32: "o32",
E_MIPS_ABI_O64: "o64",
}
def _compute_suffix_loong(elf_header):
loong_abi = elf_header.e_flags & EF_LOONGARCH_ABI_MASK
return _loong_abi_map.get(loong_abi)
def _compute_suffix_mips(elf_header):
name = None
mips_abi = elf_header.e_flags & EF_MIPS_ABI
if mips_abi:
name = _mips_abi_map.get(mips_abi)
elif elf_header.e_flags & EF_MIPS_ABI2:
name = "n32"
elif elf_header.ei_class == ELFCLASS64:
name = "n64"
return name
def _compute_suffix_riscv(elf_header):
"""
Compute riscv multilib suffix. In order to avoid possible
misidentification, only the following ABIs are recognized:
* ilp32
* ilp32d
* lp64
* lp64d
"""
name = None
if elf_header.ei_class == ELFCLASS64:
if elf_header.e_flags == EF_RISCV_RVC:
name = "lp64"
elif elf_header.e_flags == EF_RISCV_RVC | EF_RISCV_FLOAT_ABI_DOUBLE:
name = "lp64d"
elif elf_header.ei_class == ELFCLASS32:
if elf_header.e_flags == EF_RISCV_RVC:
name = "ilp32"
elif elf_header.e_flags == EF_RISCV_RVC | EF_RISCV_FLOAT_ABI_DOUBLE:
name = "ilp32d"
return name
_specialized_funcs = {
"loong": _compute_suffix_loong,
"mips": _compute_suffix_mips,
"riscv": _compute_suffix_riscv,
}
def compute_multilib_category(elf_header):
"""
Compute a multilib category from an ELF header.
@param elf_header: an ELFHeader instance
@type elf_header: ELFHeader
@rtype: str
@return: A multilib category, or None if elf_header does not fit
into a recognized category
"""
category = None
if elf_header.e_machine is not None:
prefix = _machine_prefix_map.get(elf_header.e_machine)
specialized_func = _specialized_funcs.get(prefix)
suffix = None
if specialized_func is not None:
suffix = specialized_func(elf_header)
elif elf_header.ei_class == ELFCLASS64:
suffix = "64"
elif elf_header.ei_class == ELFCLASS32:
if elf_header.e_machine == EM_X86_64:
suffix = "x32"
else:
suffix = "32"
if prefix is None or suffix is None:
category = None
else:
category = f"{prefix}_{suffix}"
return category
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