diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2021-03-26 16:12:03 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2021-04-02 12:42:54 +0200 |
| commit | bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32 (patch) | |
| tree | 8dde0d202326af69b041138399e562d72e2bae5f /tools/objtool | |
| parent | 119251855f9adf9421cb5eb409933092141ab2c7 (diff) | |
| download | linux-bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32.tar.gz linux-bcb1b6ff39da7e8a6a986eb08126fba2b5e13c32.tar.xz | |
objtool: Correctly handle retpoline thunk calls
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
Diffstat (limited to 'tools/objtool')
| -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 d45f0181f133..519af4be7018 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1025,6 +1025,18 @@ 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; |