The following commit has been merged into the objtool/core branch of tip: Commit-ID: 9e98d62aa7ea1375052895650f3e6d362336c5c9 Gitweb: https://git.kernel.org/tip/9e98d62aa7ea1375052895650f3e6d362336c5c9 Author: Julien Thierry <[email protected]> AuthorDate: Fri, 27 Mar 2020 15:28:42 Committer: Peter Zijlstra <[email protected]> CommitterDate: Thu, 30 Apr 2020 20:14:31 +02:00
objtool: Remove check preventing branches within alternative While jumping from outside an alternative region to the middle of an alternative region is very likely wrong, jumping from an alternative region into the same region is valid. It is a common pattern on arm64. The first pattern is unlikely to happen in practice and checking only for this adds a lot of complexity. Just remove the current check. Suggested-by: Josh Poimboeuf <[email protected]> Signed-off-by: Julien Thierry <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Miroslav Benes <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- tools/objtool/check.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 12e2aea..cc52da6 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2162,12 +2162,6 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, sec = insn->sec; - if (insn->alt_group && list_empty(&insn->alts)) { - WARN_FUNC("don't know how to handle branch to middle of alternative instruction group", - sec, insn->offset); - return 1; - } - while (1) { next_insn = next_insn_same_sec(file, insn);
