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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2022-04-18 09:50:39 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-04-22 12:32:04 +0200 |
| commit | 4ab7674f5951ac6a8ac4fa8828090edb64a4771f (patch) | |
| tree | acd05dfd8faea515ddc411501bd25627da4cd148 /scripts/link-vmlinux.sh | |
| parent | 26e176896a5bb9222ae3433da902edd2566a61a4 (diff) | |
objtool: Make jump label hack optional
Objtool secretly does a jump label hack to overcome the limitations of
the toolchain. Make the hack explicit (and optional for other arches)
by turning it into a cmdline option and kernel config option.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/3bdcbfdd27ecb01ddec13c04bdf756a583b13d24.1650300597.git.jpoimboe@redhat.com
Diffstat (limited to 'scripts/link-vmlinux.sh')
| -rwxr-xr-x | scripts/link-vmlinux.sh | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index 33f14fe1ddde..fa1f16840e76 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -117,6 +117,10 @@ objtool_link() # Don't perform vmlinux validation unless explicitly requested, # but run objtool on vmlinux.o now that we have an object file. + if is_enabled CONFIG_HAVE_JUMP_LABEL_HACK; then + objtoolopt="${objtoolopt} --hacks=jump_label" + fi + if is_enabled CONFIG_X86_KERNEL_IBT; then objtoolopt="${objtoolopt} --ibt" fi |