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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>
26 lines
569 B
Bash
Executable file
26 lines
569 B
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Based on powerpc relocs_check.sh
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# This script checks the relocations of a vmlinux for "suspicious"
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# relocations.
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if [ $# -lt 3 ]; then
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echo "$0 [path to objdump] [path to nm] [path to vmlinux]" 1>&2
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exit 1
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fi
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bad_relocs=$(
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${srctree}/scripts/relocs_check.sh "$@" |
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# These relocations are okay
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# R_RISCV_RELATIVE
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grep -F -w -v 'R_RISCV_RELATIVE'
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)
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if [ -z "$bad_relocs" ]; then
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exit 0
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fi
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num_bad=$(echo "$bad_relocs" | wc -l)
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echo "WARNING: $num_bad bad relocations"
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echo "$bad_relocs"
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