The following commit has been merged into the objtool/core branch of tip: Commit-ID: fb136219f0e2b417d84e67b2a3adc1f933997d04 Gitweb: https://git.kernel.org/tip/fb136219f0e2b417d84e67b2a3adc1f933997d04 Author: Julien Thierry <jthierry@xxxxxxxxxx> AuthorDate: Tue, 15 Sep 2020 08:53:17 +01:00 Committer: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> CommitterDate: Fri, 18 Sep 2020 12:04:00 -05:00 objtool: Ignore unreachable fake jumps It is possible for alternative code to unconditionally jump out of the alternative region. In such a case, if a fake jump is added at the end of the alternative instructions, the fake jump will never be reached. Since the fake jump is just a mean to make sure code validation does not go beyond the set of alternatives, reaching it is not a requirement. Signed-off-by: Julien Thierry <jthierry@xxxxxxxxxx> Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> --- tools/objtool/check.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index fd2edab..cd7c669 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2648,6 +2648,9 @@ static bool ignore_unreachable_insn(struct instruction *insn) !strcmp(insn->sec->name, ".altinstr_aux")) return true; + if (insn->type == INSN_JUMP_UNCONDITIONAL && insn->offset == FAKE_JUMP_OFFSET) + return true; + if (!insn->func) return false;
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