| Peter Collingbourne | 5cf896fb6 | 2019-07-31 18:18:42 -0700 | [diff] [blame] | 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 | |
| Ilie Halip | 65e1f38 | 2019-11-12 15:45:20 +0200 | [diff] [blame] | 7 | cat << "END" | $CC -c -x c - -o $tmp_file.o >/dev/null 2>&1 |
| Peter Collingbourne | 5cf896fb6 | 2019-07-31 18:18:42 -0700 | [diff] [blame] | 8 | void *p = &p; |
| 9 | END |
| Fangrui Song | ccb2d17 | 2023-04-11 20:09:44 +0000 | [diff] [blame] | 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 $tmp_file 2>&1 | |
| 14 | grep -q pack-relative-relocs && exit 1 |
| 15 | fi |
| Peter Collingbourne | 5cf896fb6 | 2019-07-31 18:18:42 -0700 | [diff] [blame] | 16 | |
| 17 | # Despite printing an error message, GNU nm still exits with exit code 0 if it |
| 18 | # sees a relr section. So we need to check that nothing is printed to stderr. |
| Ilie Halip | 65e1f38 | 2019-11-12 15:45:20 +0200 | [diff] [blame] | 19 | test -z "$($NM $tmp_file 2>&1 >/dev/null)" |
| Peter Collingbourne | 5cf896fb6 | 2019-07-31 18:18:42 -0700 | [diff] [blame] | 20 | |
| Ilie Halip | 65e1f38 | 2019-11-12 15:45:20 +0200 | [diff] [blame] | 21 | $OBJCOPY -O binary $tmp_file $tmp_file.bin |
