1#!/bin/sh -eu 2# SPDX-License-Identifier: GPL-2.0 3 4tmp_file=$(mktemp) 5trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT 6 7cat << "END" | $CC -c -x c - -o $tmp_file.o >/dev/null 2>&1 8void *p = &p; 9END 10 11# ld.lld before 15 did not support -z pack-relative-relocs. 12if ! $LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr -o $tmp_file 2>/dev/null; then 13 $LD $tmp_file.o -shared -Bsymbolic -z pack-relative-relocs -o $tmp_file 2>&1 | 14 grep -q pack-relative-relocs && exit 1 15fi 16 17# Despite printing an error message, GNU nm still exits with exit code 0 if it 18# sees a relr section. So we need to check that nothing is printed to stderr. 19test -z "$($NM $tmp_file 2>&1 >/dev/null)" 20 21$OBJCOPY -O binary $tmp_file $tmp_file.bin 22