linux/scripts/tools-support-relr.sh
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   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 $tmp_file.o >/dev/null 2>&1
   8void *p = &p;
   9END
  10$LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr \
  11  --use-android-relr-tags -o $tmp_file
  12
  13# Despite printing an error message, GNU nm still exits with exit code 0 if it
  14# sees a relr section. So we need to check that nothing is printed to stderr.
  15test -z "$($NM $tmp_file 2>&1 >/dev/null)"
  16
  17$OBJCOPY -O binary $tmp_file $tmp_file.bin
  18