Re: [PATCH v6 03/30] objtool: Disassemble code with libopcodes instead of running objdump

[Guenter Roeck]

On 12/8/25 23:51, Alexandre Chartre wrote:
> On 12/9/25 07:58, Guenter Roeck wrote:
> > Hi,
> >
> > On Fri, Nov 21, 2025 at 10:53:13AM +0100, Alexandre Chartre wrote:
> > > objtool executes the objdump command to disassemble code. Use libopcodes
> > > instead to have more control about the disassembly scope and output.
> > > If libopcodes is not present then objtool is built without disassembly
> > > support.
> > >
> > > Signed-off-by: Alexandre Chartre <alexandre.chartre@xxxxxxxxxx>
> >
> > With this patch in mainline, I get the following build error when trying
> > to build x86_64:defconfig (and other configurations).
> >
> > Bisect log is attached. I see the problem with gcc 11.4.0, 13.3.0, and
> > 14.3.0. I tried with both Ubuntu 22.04 and 24.04.
>
> This sounds like a configuration issue depending on the binutils version; in
> particular the setting of DISASM_INIT_STYLED (although that's supposed to be
> automatically configured by tools/objtool/Makefile).
>
> Which binutils-devel version are you using?

I tried 2.38 (with gcc 11.4), 2.42 (with gcc 13.3), and 2.44 (with gcc 14.3)
in three different environments (Ubuntu 12.4, 14.4, and self-built tools).

Guenter