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#!/bin/sh
# shellcheck disable=SC2086,SC2119,SC2120
# shellcheck source=../lib/load-configuration
. "${0%/*}/../lib/load-configuration"
usage( ) {
>&2 cat <<EOF
check_opcodes: [options] [ -a <arch> ] <package>
possible optons:
-h|--help: Show this help page
-a|--architecture: architecture family to check against, one of
i486, i686, pentium3 (meaning target architecture
the package should be runnable on)
-v|--verbose: Verbose output, print result of check for logs
-d|--debug: Debug output, used for development and testing
EOF
exit 1
}
VERBOSE=0
DEBUG=0
EXIT_CODE=0
verbose( ) {
if test $VERBOSE = 1; then
echo "$@"
fi
}
debug( ) {
if test $DEBUG = 1; then
echo "$@"
fi
}
err( ) {
echo "ERROR: $*"
EXIT_CODE=1
}
tmp_dir=$(mktemp -d "${work_dir}/tmp.check-opcodes.XXXXXX")
trap 'rm -rf --one-file-system "${tmp_dir:?}"' EXIT
ARCH=i686
while getopts ":vda:h-:" opt; do
case $opt in
-)
case "$OPTARG" in
help)
usage
;;
verbose)
VERBOSE=1
;;
debug)
DEBUG=1
;;
*)
echo "ERROR: Invalid option: --$OPTARG" >&2
usage
;;
esac
;;
h)
usage
;;
v)
VERBOSE=1
;;
d)
DEBUG=1
;;
a)
ARCH=$OPTARG
;;
\?)
echo "ERROR: Invalid option: -$OPTARG" >&2
usage
;;
esac
done
shift $((OPTIND-1))
PACKAGE=$1
if test "$PACKAGE" = ""; then
echo "ERROR: Filename of a package required as argument" >&2
usage
exit 1
fi
OPCODE_ARGS=""
case $ARCH in
i486)
OPCODE_ARGS='-r -a 386 -v'
;;
i686)
OPCODE_ARGS='-s MMX -s SSE'
;;
# TODO: pentium4
pentium3)
OPCODE_ARGS='-s SSE2 -s SSE3'
;;
*)
echo "ERROR: architecture must currently be one of i486, i686 and pentium3" >&2
usage
exit 1
esac
debug "Unpacking $PACKAGE to $tmp_dir.."
bsdtar --no-fflags -x -C $tmp_dir -f $PACKAGE
debug "Checking for architecture: $ARCH ($OPCODE_ARGS).."
# shellcheck disable=SC2044
for absfile in $(find $tmp_dir \( -regextype grep -regex '.*\.so\(\.[0-9.]\+\)\?' -type f \) -o \( -executable -type f \) ); do
file=$(basename $absfile)
relfile=${absfile#$tmp_dir}
debug "Checking file: $relfile"
if ! readelf -a $absfile > $tmp_dir/$file.elf 2>/dev/null; then
debug "readelf failed, ignoring file"
continue
fi
if ! objdump -f $absfile > $tmp_dir/$file.objdump 2>/dev/null; then
debug "objdump failed, ignoring file"
continue
fi
file $absfile > $tmp_dir/$file.file
arch=$(grep ^architecture $tmp_dir/$file.objdump | sed 's/^architecture: //g' | cut -f 1 -d ,)
case $arch in
i386:x86-64)
arch='x86_64'
;;
i386)
arch='x86'
;;
*)
arch='unknown'
;;
esac
debug " Objdump architecture: $arch"
archelf=$(grep '^ \+Class' $tmp_dir/$file.elf | cut -f 2 -d : | tr -d ' ')
case $archelf in
ELF64)
archelf='x86_64'
;;
ELF32)
archelf='x86'
;;
*)
archelf='unknown'
;;
esac
debug " Readelf architecture: $archelf"
if test $arch != $archelf; then
err "ERROR: $file ambigous architecture information (objdump: $arch, ELF: $archelf)"
fi
if test $arch = "x86_64"; then
err "ERROR: $file is a 64-bit library!"
continue
fi
objdump -M intel -d $absfile > $tmp_dir/$file.asm
bad_opcodes=$(${base_dir}/bin/opcode $OPCODE_ARGS -m 1 < $tmp_dir/$file.asm | wc -l)
if test $bad_opcodes != 0; then
case $ARCH in
i486)
err "$relfile is not built for plain i486 opcodes"
;;
i686)
err "$relfile contains MMX, SSE or newer opcodes"
;;
pentium3)
err "$relfile contains SSE2 or newer opcodes"
;;
esac
if test $DEBUG = 1; then
${base_dir}/bin/opcode $OPCODE_ARGS -B 2 -A 2 < $tmp_dir/$file.asm
fi
else
if test $VERBOSE = 1; then
verbose "OK: $relfile fullfills architecture constraint for $ARCH"
fi
fi
done
exit $EXIT_CODE
|