Re: [Tinycc-devel] severe regression in TCC compiling and linking kernel since may 2022

[grischka]

On 13.11.2024 00:41, Vad Rulezz wrote:
> I'll look into it, having ability to build/boot linux is a nice thing.
>
> I think the issue is may be the sections ordering while linking. Well, maybe 
> something else too, but it't unlikely there is a lot of brokiness..

To have executable code come first in the "vmlinux" non-elf binary
you can try this:

in tccelf.c:sort_sections():
             if (s->sh_flags & SHF_EXECINSTR)
-                k = 0x70;
+                k = 0x30;

Currently (with k=0x70) it would put ro-data first.

-- grischka

> Vad Rulezz
>
> On 11/13/24 2:24 AM, Michael Ackermann via Tinycc-devel wrote:
> > This one from seyko2 is a good start for AoT compiling/linking linux-2.4:
> > https://github.com/seyko2/tccboot
> > FYI, for 16bit real-mode bootcode assembly binutils-as is needed,
> > 32bit compiling/assembly/linking is handled nicely by tcc.
> > and i've mentioned the latest commit-id on mob branch that i tested with.
> >
> > Myself too had tested tccboot JiT, which i succeeded with once with some updated
> > tcc mob branch version linked against, but didn't test any further, not yet.
> > tccboot is available from bellard.org
> >
> > anyway, the regression on tcc mob branch seems rather severe, although it's
> > disclosed by kernel compilation for x86 only, i suspect it potentially affects
> > various other test-cases and architectures.
> >
> > On 2024-11-13 00:56, Vad Rulezz wrote:
> > > Hello Michael,
> > >
> > > On 11/12/24 10:27 PM, Michael Ackermann via Tinycc-devel wrote:
> > > > The revert/backout diff that i could confirm that tcc succeeds compiling/linking
> > > > kernel with is attached.
> > >
> > > Can you share a script or somewhat detailed instructions on how to build
> > > linux kernel with TCC?
> > >
> > >
> > > Vad Rulezz
> > >
> > > _______________________________________________
> > > Tinycc-devel mailing list
> > > Tinycc-devel@nongnu.org
> > > https://lists.nongnu.org/mailman/listinfo/tinycc-devel
> >
> >
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