Messages in this thread | | | From | Sami Tolvanen <> | Date | Mon, 9 Nov 2020 20:48:01 -0800 | Subject | Re: [PATCH v6 22/25] x86/asm: annotate indirect jumps |
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On Mon, Nov 9, 2020 at 6:29 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote: > How would I recreate all these warnings?
You can reproduce all of these using a normal gcc build without any of the LTO patches by running objtool check -arfld vmlinux.o. However, with gcc you'll see even more warnings due to duplicate symbol names, as Peter pointed out elsewhere in the thread, so I looked at only the warnings that objtool also prints with LTO.
Note that the LTO series contains a patch to split noinstr validation from --vmlinux, as we need to run objtool here even if CONFIG_VMLINUX_VALIDATION isn't selected, so I have not looked at the noinstr warnings. The latest LTO tree is available here:
https://github.com/samitolvanen/linux/commits/clang-lto
> Here's the patch for hopefully making the warnings more helpful:
Thanks, I'll give it a try.
Sami
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