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author | Alexandre Ghiti <alex@ghiti.fr> | 2023-03-29 06:53:27 +0200 |
---|---|---|
committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-19 07:46:31 -0700 |
commit | 47981b5cc6871d78aee67b6c9ae70aff90ddb97d (patch) | |
tree | fec87ba32d4be2e3c55906bef226946af3268a3d /arch/powerpc | |
parent | 39b33072941f8bab82aa2c802044062385a046bf (diff) | |
download | linux-47981b5cc6871d78aee67b6c9ae70aff90ddb97d.tar.gz linux-47981b5cc6871d78aee67b6c9ae70aff90ddb97d.tar.bz2 linux-47981b5cc6871d78aee67b6c9ae70aff90ddb97d.zip |
powerpc: Move script to check relocations at compile time in scripts/
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.
Powerpc architecture has a script that allows to check at compile time
for such unexpected relocations: extract the common logic to scripts/
so that other architectures can take advantage of it.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Anup Patel <anup@brainfault.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Link: https://lore.kernel.org/r/20230329045329.64565-5-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/powerpc')
-rwxr-xr-x | arch/powerpc/tools/relocs_check.sh | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/arch/powerpc/tools/relocs_check.sh b/arch/powerpc/tools/relocs_check.sh index 63792af00417..6b350e75014c 100755 --- a/arch/powerpc/tools/relocs_check.sh +++ b/arch/powerpc/tools/relocs_check.sh @@ -15,21 +15,8 @@ if [ $# -lt 3 ]; then exit 1 fi -# Have Kbuild supply the path to objdump and nm so we handle cross compilation. -objdump="$1" -nm="$2" -vmlinux="$3" - -# Remove from the bad relocations those that match an undefined weak symbol -# which will result in an absolute relocation to 0. -# Weak unresolved symbols are of that form in nm output: -# " w _binary__btf_vmlinux_bin_end" -undef_weak_symbols=$($nm "$vmlinux" | awk '$1 ~ /w/ { print $2 }') - bad_relocs=$( -$objdump -R "$vmlinux" | - # Only look at relocation lines. - grep -E '\<R_' | +${srctree}/scripts/relocs_check.sh "$@" | # These relocations are okay # On PPC64: # R_PPC64_RELATIVE, R_PPC64_NONE @@ -44,8 +31,7 @@ R_PPC_ADDR16_LO R_PPC_ADDR16_HI R_PPC_ADDR16_HA R_PPC_RELATIVE -R_PPC_NONE' | - ([ "$undef_weak_symbols" ] && grep -F -w -v "$undef_weak_symbols" || cat) +R_PPC_NONE' ) if [ -z "$bad_relocs" ]; then |