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| author |   Josh Poimboeuf <jpoimboe@redhat.com> | 2022-04-18 09:50:20 -0700 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-04-19 21:58:48 +0200 |
| commit | 4a5de9b76fcb3f477f73d5a63f6e27709e8af81f (patch) | |
| tree | 42d3716fefa8989fdeee094668022cde9264df49 /scripts/Makefile.build | |
| parent | x86,objtool: Explicitly mark idtentry_body()s tail REACHABLE (diff) | |
| download | linux-dev-4a5de9b76fcb3f477f73d5a63f6e27709e8af81f.tar.xz linux-dev-4a5de9b76fcb3f477f73d5a63f6e27709e8af81f.zip | |
objtool: Enable unreachable warnings for CLANG LTO
With IBT support in, objtool is now fully capable of following vmlinux
code flow in LTO mode. Start reporting unreachable warnings for Clang
LTO as well.
Fixes: ed53a0d97192 ("x86/alternative: Use .ibt_endbr_seal to seal indirect calls")
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/7b12df54bceeb0761fe9fc8269ea0c00501214a9.1650300597.git.jpoimboe@redhat.com
Diffstat (limited to 'scripts/Makefile.build')
| -rw-r--r-- | scripts/Makefile.build | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 9717e6f6fb31..33c1ed581522 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -231,7 +231,7 @@ objtool_args = \ $(if $(part-of-module), --module) \ $(if $(CONFIG_X86_KERNEL_IBT), --lto --ibt) \ $(if $(CONFIG_FRAME_POINTER),, --no-fp) \ - $(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\ + $(if $(CONFIG_GCOV_KERNEL), --no-unreachable) \ $(if $(CONFIG_RETPOLINE), --retpoline) \ $(if $(CONFIG_X86_SMAP), --uaccess) \ $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount) \ |