Re: [RFC 00/31] objtool, livepatch: Livepatch module generation

[Song Liu]

On Thu, Sep 5, 2024 at 12:13 AM Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote:
>
> On Wed, Sep 04, 2024 at 09:14:00PM -0700, Josh Poimboeuf wrote:
>
> > +     if (!!nr_objs) {
>             ^^
>             oops
>
> Fixed version:

The fixed version works for the following cases with gcc-12:

1. no BTF, no IBT;
2. with BTF and CONFIG_MODULE_ALLOW_BTF_MISMATCH, no IBT;
3. with BTF and CONFIG_MODULE_ALLOW_BTF_MISMATCH, with IBT;

There is still some issue with BTF, so we need
CONFIG_MODULE_ALLOW_BTF_MISMATCH here.

But it appears to be mostly working.

OTOH, there are still some issues with LLVM ("symbol 'xxx' already
defined", etc.).

Thanks,
Song