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    Subject[PATCH 5.10 320/663] objtool: Fix ".cold" section suffix check for newer versions of GCC
    Date
    From: Josh Poimboeuf <jpoimboe@redhat.com>

    [ Upstream commit 34ca59e109bdf69704c33b8eeffaa4c9f71076e5 ]

    With my version of GCC 9.3.1 the ".cold" subfunctions no longer have a
    numbered suffix, so the trailing period is no longer there.

    Presumably this doesn't yet trigger a user-visible bug since most of the
    subfunction detection logic is duplicated. I only found it when
    testing vmlinux.o validation.

    Fixes: 54262aa28301 ("objtool: Fix sibling call detection")
    Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
    Link: https://lore.kernel.org/r/ca0b5a57f08a2fbb48538dd915cc253b5edabb40.1611263461.git.jpoimboe@redhat.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    tools/objtool/check.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/tools/objtool/check.c b/tools/objtool/check.c
    index 48e22e3c6f186..dc24aac08edd6 100644
    --- a/tools/objtool/check.c
    +++ b/tools/objtool/check.c
    @@ -850,8 +850,8 @@ static int add_jump_destinations(struct objtool_file *file)
    * case where the parent function's only reference to a
    * subfunction is through a jump table.
    */
    - if (!strstr(insn->func->name, ".cold.") &&
    - strstr(insn->jump_dest->func->name, ".cold.")) {
    + if (!strstr(insn->func->name, ".cold") &&
    + strstr(insn->jump_dest->func->name, ".cold")) {
    insn->func->cfunc = insn->jump_dest->func;
    insn->jump_dest->func->pfunc = insn->func;

    --
    2.27.0


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