ARM EABI buildroot

[Tzungder Lin]

If you use buildroot to create your toolchain
It seems config gcc default to ARMv5T architecture
Maybe that's why you got illegal instruction exceptions...
I think you could try to config gcc default to ARMv4T by hand.
(gcc/config/arm/linux-eabi.h)
I did this to make my ARMv4 CPU support the EABI interface
(though without thumb and normal mode interworking)
FYR

On 5/30/07, Tzungder Lin <tzungder at gmail.com> wrote:
> Hi,
>
> FYR
> "The EABI includes thumb interworking, which means that 16-bit Thumb
> and normal 32-bit ARM instructions can be mixed at function-level
> granularity. With current gcc this requires at least an armv4t core,
> because it uses the BX instruction which does not exist in armv4 or
> earlier." --- from debian-eabi-arm
>
> I think it's ok.
>
>
> On 5/30/07, Daniel Smolik <marvin at mydatex.cz> wrote:
> > Tzungder Lin napsal(a):
> > > Hi, what's your ARM version?
> > > EABI will use BX, BLX instructions which only be supported in ARMv4t
> > > and the later versions.
> > > FYR
> > Hi,
> > this is my /proc/cpuinfo
> >
> > Processor       : ARM920T rev 0 (v4l)
> >
> > BogoMIPS        : 49.86
> >
> > Features        : swp half thumb
> >
> > CPU implementer : 0x41
> >
> > CPU architecture: 4T
> >
> > CPU variant     : 0x1
> >
> > CPU part        : 0x920
> >
> > CPU revision    : 0
> >
> > Cache type      : write-back
> >
> > Cache clean     : cp15 c7 ops
> >
> > Cache lockdown  : format A
> >
> > Cache format    : Harvard
> >
> > I size          : 16384
> >
> > I assoc         : 64
> >
> > I line length   : 32
> >
> > I sets          : 8
> >
> > D size          : 16384
> >
> > D assoc         : 64
> >
> > D line length   : 32
> >
> > D sets          : 8
> >
> > Is it OK for EABI ?
> >
> >                         Dan
> >
> >
> >
> >
> >
> > >
> > > On 5/29/07, Daniel Smolik <marvin at mydatex.cz> wrote:
> > >> Fernando Rodriguez napsal(a):
> > >> > Have you got EABI support built in the kernel?
> > >> >
> > >> > Fernando
> > >> >
> > >> > Daniel Smolik wrote:
> > >> >> Hi,
> > >> >> have anybody working uClibc with 2.6 kernel on ARM with EABI?
> > >> >> I compile buildroot with EABI support but when kenel boots I only see
> > >> >> Freeing unused kernel memory and it's all. When I compile buildroot
> > >> and
> > >> >> uClibc with OABI (and apply my ugly hack to _NR_syscall) all works.
> > >> >> I compile static version of busybox and boot to EABI root all command
> > >> >> crash with Illegal instruction.
> > >> >>
> > >> >>
> > >> >>                      Dan
> > >> >>
> > >>
> > >> Yes I have, I try disable/enable Maverick Crunch support and still the
> > >> same.
> > >>
> > >>                                 Dan
> > >> _______________________________________________
> > >> uClibc mailing list
> > >> uClibc at uclibc.org
> > >> http://busybox.net/cgi-bin/mailman/listinfo/uclibc
> > >>
> >
> >
> > --
> > Mydatex s r.o.
> > http://www.mydatex.cz
> > email: smolik at mydatex.cz
> > mob: 604200362
> > tel: 226210085
> >
>