#!/usr/bin/env bash
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# List of hardcoded paths that should be ignored, as they may
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# contain binaries for an architecture different from the
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# architecture of the target.
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declare -a IGNORES=(
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# Skip firmware files, they could be ELF files for other
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# architectures
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"/lib/firmware"
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"/usr/lib/firmware"
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# Skip kernel modules
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# When building a 32-bit userland on 64-bit architectures, the kernel
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# and its modules may still be 64-bit. To keep the basic
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# check-bin-arch logic simple, just skip this directory.
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"/lib/modules"
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"/usr/lib/modules"
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# Skip files in /usr/share, several packages (qemu,
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# pru-software-support) legitimately install ELF binaries that
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# are not for the target architecture
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"/usr/share"
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# Skip files in {/usr,}/lib/grub, since it is possible to have
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# it for a different architecture (e.g. i386 grub on x86_64).
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"/lib/grub"
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"/usr/lib/grub"
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# Guile modules are ELF files, with a "None" machine
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"/usr/lib/guile"
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)
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while getopts p:l:r:a:i: OPT ; do
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case "${OPT}" in
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p) package="${OPTARG}";;
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l) pkg_list="${OPTARG}";;
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r) readelf="${OPTARG}";;
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a) arch_name="${OPTARG}";;
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i)
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# Ensure we do have single '/' as separators,
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# and that we have a leading and a trailing one.
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pattern="$(sed -r -e 's:/+:/:g; s:^/*:/:; s:/*$:/:;' <<<"${OPTARG}")"
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IGNORES+=("${pattern}")
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;;
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:) error "option '%s' expects a mandatory argument\n" "${OPTARG}";;
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\?) error "unknown option '%s'\n" "${OPTARG}";;
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esac
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done
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if test -z "${package}" -o -z "${pkg_list}" -o -z "${readelf}" -o -z "${arch_name}" ; then
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echo "Usage: $0 -p <pkg> -l <pkg-file-list> -r <readelf> -a <arch name> [-i PATH ...]"
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exit 1
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fi
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exitcode=0
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# Only split on new lines, for filenames-with-spaces
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IFS="
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"
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while read f; do
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for ignore in "${IGNORES[@]}"; do
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if [[ "${f}" =~ ^"${ignore}" ]]; then
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continue 2
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fi
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done
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# Skip symlinks. Some symlinks may have absolute paths as
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# target, pointing to host binaries while we're building.
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if [[ -L "${TARGET_DIR}/${f}" ]]; then
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continue
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fi
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# Get architecture using readelf. We pipe through 'head -1' so
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# that when the file is a static library (.a), we only take
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# into account the architecture of the first object file.
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arch=$(LC_ALL=C ${readelf} -h "${TARGET_DIR}/${f}" 2>&1 | \
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sed -r -e '/^ Machine: +(.+)/!d; s//\1/;' | head -1)
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# If no architecture found, assume it was not an ELF file
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if test "${arch}" = "" ; then
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continue
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fi
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# Architecture is correct
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if test "${arch}" = "${arch_name}" ; then
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continue
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fi
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printf 'ERROR: architecture for "%s" is "%s", should be "%s"\n' \
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"${f}" "${arch}" "${arch_name}"
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exitcode=1
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done < <( sed -r -e "/^${package},\.(.+)$/!d; s//\1/;" ${pkg_list} )
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exit ${exitcode}
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