diff options
| author | Alexandre Ghiti <alex@ghiti.fr> | 2023-03-29 06:53:28 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-19 07:46:32 -0700 |
| commit | c2dea0bc53397166a77811d9b66928643a83d6f3 (patch) | |
| tree | 778bb8026b57daf5e8e4f92e2ba661b25eebb474 /arch/riscv/tools | |
| parent | 47981b5cc6871d78aee67b6c9ae70aff90ddb97d (diff) | |
riscv: Check relocations at compile time
Relocating kernel at runtime is done very early in the boot process, so
it is not convenient to check for relocations there and react in case a
relocation was not expected.
There exists a script in scripts/ that extracts the relocations from
vmlinux that is then used at postlink to check the relocations.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20230329045329.64565-6-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/tools')
| -rwxr-xr-x | arch/riscv/tools/relocs_check.sh | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/riscv/tools/relocs_check.sh b/arch/riscv/tools/relocs_check.sh new file mode 100755 index 000000000000..baeb2e7b2290 --- /dev/null +++ b/arch/riscv/tools/relocs_check.sh @@ -0,0 +1,26 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0-or-later +# Based on powerpc relocs_check.sh + +# This script checks the relocations of a vmlinux for "suspicious" +# relocations. + +if [ $# -lt 3 ]; then + echo "$0 [path to objdump] [path to nm] [path to vmlinux]" 1>&2 + exit 1 +fi + +bad_relocs=$( +${srctree}/scripts/relocs_check.sh "$@" | + # These relocations are okay + # R_RISCV_RELATIVE + grep -F -w -v 'R_RISCV_RELATIVE' +) + +if [ -z "$bad_relocs" ]; then + exit 0 +fi + +num_bad=$(echo "$bad_relocs" | wc -l) +echo "WARNING: $num_bad bad relocations" +echo "$bad_relocs" |