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| author | Peter Zijlstra <peterz@infradead.org> | 2021-03-26 18:12:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-25 12:26:13 +0300 |
| commit | 6e95f8caffb3f10e48b100c47e753ca83042fe6f (patch) | |
| tree | 4f32a1549edee9b9a648d2be678f2c7bae9ec782 /tools | |
| parent | 28ca351296742a9e7506a548acaf7ea3bc9feef0 (diff) | |
| download | linux-6e95f8caffb3f10e48b100c47e753ca83042fe6f.tar.xz | |
objtool: Correctly handle retpoline thunk calls
commit bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32 upstream.
Just like JMP handling, convert a direct CALL to a retpoline thunk
into a retpoline safe indirect CALL.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/20210326151259.567568238@infradead.org
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/objtool/check.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 334781ee60f1..da78811ffda5 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -953,6 +953,18 @@ static int add_call_destinations(struct objtool_file *file) dest_off); return -1; } + + } else if (!strncmp(reloc->sym->name, "__x86_indirect_thunk_", 21)) { + /* + * Retpoline calls are really dynamic calls in + * disguise, so convert them accordingly. + */ + insn->type = INSN_CALL_DYNAMIC; + insn->retpoline_safe = true; + + remove_insn_ops(insn); + continue; + } else insn->call_dest = reloc->sym; |