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#!/bin/sh
. "${0%/*}/../conf/default.conf"
usage( ) {
>&2 cat <<EOF
check_opcodes: [ -a <arch> ] <package>
possible optons:
-h|--help: Show this help page
-v|--verbose: Verbose output
-a|--architecture: architecture family to check against, one of
i486, i686, pentium4
EOF
exit 1
}
VERBOSE=0
EXIT_CODE=0
log( ) {
if test $VERBOSE = 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 ":va:h-:" opt; do
case $opt in
-)
case "$OPTARG" in
help)
usage
;;
verbose)
VERBOSE=1
;;
*)
echo "ERROR: Invalid option: --$OPTARG" >&2
usage
;;
esac
;;
h)
usage
;;
v)
VERBOSE=1
;;
a)
ARCH=$OPTARG
;;
\?)
echo "ERROR: Invalid option: -$OPTARG" >&2
usage
;;
esac
done
shift $((OPTIND-1))
PACKAGE=$1
if test "x$PACKAGE" = "x"; 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 486 -v'
;;
i686)
OPCODE_ARGS='-s MMX -s SSE -s SSE2'
;;
pentium4)
OPCODE_ARGS='-s SSE3 -s SSSE3 -s AVX'
;;
*)
echo "ERROR: architecture must currently be one of i486 and i686" >&2
usage
exit 1
esac
log "Checking for architecture: $ARCH ($OPCODE_ARGS)"
bsdtar --no-fflags -x -C $tmp_dir -f $PACKAGE
for absfile in `find $tmp_dir -name '*.so*' -type f`; do
file=`basename $absfile`
log "Checking shared library: $file"
readelf -a $absfile > $tmp_dir/$file.elf
objdump -f $absfile > $tmp_dir/$file.objdump
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
log " 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
log " Readelf architecture: $archelf"
if test $arch != $archelf; then
err "$file ambigous architecture information (objdump: $arch, ELF: $archelf)"
fi
if test $arch = "x86_64"; then
err "$file is a 64-bit library!"
continue
fi
objdump -M intel -d $absfile > $tmp_dir/$file.asm
bad_opcodes=`cat $tmp_dir/$file.asm | ${base_dir}/bin/opcode $OPCODE_ARGS -m 1 | wc -l`
if test $bad_opcodes != 0; then
case $ARCH in
i486)
err "$file is not built for plain i486 opcodes"
;;
i686)
err "$file contains MMX, SSE or SSE2 opcodes"
;;
pentium4)
err "$file contains SSE3 or newer opcodes"
;;
esac
else
if test $VERBOSE = 1; then
log "$file fullfills architecture constraint for $ARCH"
fi
fi
done
exit $EXIT_CODE
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