On Thu, 5 Jul 2018 at 10:59, Thomas Petazzoni
<thomas.petazz...@bootlin.com> wrote:
>
> Hello,
>
> On Thu, 5 Jul 2018 10:55:26 +0200, Christophe Lyon wrote:
>
> > > /tmp/cceTVltl.s: Assembler messages:
> > > /tmp/cceTVltl.s:14: Error: selected processor does not support ARM opcodes
> > > /tmp/cceTVltl.s:19: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `sub r4,pc,#8'
> > > /tmp/cceTVltl.s:20: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `ldr r1,.L__ROFIXUP_LIST__'
> > > /tmp/cceTVltl.s:21: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `add r1,r1,r4'
> > > /tmp/cceTVltl.s:22: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `ldr r2,.L__ROFIXUP_END__'
> > > /tmp/cceTVltl.s:23: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `add r2,r2,r4'
> > > /tmp/cceTVltl.s:24: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `movs r0,r8'
> > > /tmp/cceTVltl.s:25: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `moveq r0,r7'
> > > /tmp/cceTVltl.s:26: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `push {r7,r8,r9,r10}'
> > > /tmp/cceTVltl.s:27: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `bl __self_reloc'
> > > /tmp/cceTVltl.s:28: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `pop {r7,r8,r9,r10}'
> > > /tmp/cceTVltl.s:29: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `mov r1,r7'
> > > /tmp/cceTVltl.s:30: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `mov r2,r8'
> > > /tmp/cceTVltl.s:31: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `mov r3,r9'
> > > /tmp/cceTVltl.s:32: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `mov r4,sp'
> > > /tmp/cceTVltl.s:33: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `sub r5,sp,#8'
> > > /tmp/cceTVltl.s:34: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `sub sp,sp,#16'
> > > /tmp/cceTVltl.s:35: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `str r4,[sp,#4]'
> > > /tmp/cceTVltl.s:36: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `str r5,[sp,#0]'
> > > /tmp/cceTVltl.s:37: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `mov r9,r0'
> > > /tmp/cceTVltl.s:38: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `mov r4,r9'
> > > /tmp/cceTVltl.s:39: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `bl _dl_start'
> > > /tmp/cceTVltl.s:40: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `ldr r10,.L_dl_fini_gotofffuncdesc'
> > > /tmp/cceTVltl.s:41: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `add r10,r10,r4'
> > > /tmp/cceTVltl.s:42: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `ldr r5,[sp,#8]'
> > > /tmp/cceTVltl.s:43: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `ldr r9,[sp,#12]'
> > > /tmp/cceTVltl.s:44: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `add sp,sp,#16'
> > > /tmp/cceTVltl.s:45: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `bx r5'
> > > /tmp/cceTVltl.s:47: Error: attempt to use an ARM instruction on a
> > > Thumb-only processor -- `b .loopforever'
> > > make[2]: *** [ldso/ldso/ldso.oS] Error 1
> > > make[1]: ***
> > > [/home/test/outputs/arm-fdpic/build/uclibc-1.0.30/.stamp_built] Error 2
> > > make: *** [_all] Error 2
> > >
> > > Any idea ?
> > >
> >
> > Thanks for checking that. I did build with a GCC defaulting to Thumb
> > mode, but it still uses a CPU that supports ARM mode, so I missed
> > these problems.
>
> Thanks for your quick feedback.
>
> So you mean that you tested building for a Cortex-A platform and not
> Cortex-M ?
>
Yes, the original work was actually for Cortex-R.
> Since this FDPIC work is mainly intended for noMMU platforms, my first
> test was to build a toolchain targeting Cortex-M, which only support
> Thumb 2.
That was a good thing to do :)
> Best regards,
>
> Thomas
> --
> Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
> Embedded Linux and Kernel engineering
> https://bootlin.com
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