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