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    Subject[PATCH v6 10/33] objtool: arm64: Handle supported relocations in alternatives
    Date
    Based on get_alt_insn() in arch/arm64/kernel/alternative.c, arm64
    alternative code adapts offsets for static branches and adrp
    instructions.

    Signed-off-by: Julien Thierry <jthierry@redhat.com>
    Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
    ---
    tools/objtool/arch/arm64/special.c | 6 +++++-
    1 file changed, 5 insertions(+), 1 deletion(-)

    diff --git a/tools/objtool/arch/arm64/special.c b/tools/objtool/arch/arm64/special.c
    index 45f283283091..a70b91e8bd7d 100644
    --- a/tools/objtool/arch/arm64/special.c
    +++ b/tools/objtool/arch/arm64/special.c
    @@ -10,7 +10,11 @@ bool arch_support_alt_relocation(struct special_alt *special_alt,
    struct instruction *insn,
    struct reloc *reloc)
    {
    - return false;
    + u32 opcode = *(u32 *)(insn->sec->data->d_buf + insn->offset);
    +
    + return aarch64_insn_is_branch_imm(opcode) ||
    + aarch64_insn_is_adrp(opcode) ||
    + !aarch64_insn_uses_literal(opcode);
    }


    --
    2.17.1
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