[oe] EABI pain and frustration!

[Khem Raj]

On Fri, Feb 5, 2010 at 5:37 PM,  <pspreadborough at comcast.net> wrote:
>
> ----- "Travis Stratman" <tstratman at emacinc.com> wrote:
>> On Fri, 2010-02-05 at 13:41 -0800, Khem Raj wrote:
>> > On Fri, Feb 5, 2010 at 12:43 PM, Travis Stratman <tstratman at emacinc.com> wrote:
>> > > On Fri, 2010-02-05 at 10:00 -0800, Khem Raj wrote:
>> > >> On Fri, Feb 5, 2010 at 4:29 AM, Detlef Vollmann <dv at vollmann.ch> wrote:
>> > >> > On 02/03/10 15:03, pspreadborough at comcast.net wrote:
>> > >> >>
>> > >> >> My 2.6.29 kernel is built with the CodeSourcery
>> > >> >> arm-2009q3-67-arm-none-linux-gnueabi compiler and has the EABI and
>> > >> >> OABI_COMPAT config options enabled. Using this kernel I can boot my SA1110
>> > >> >> iPaq into a OABI ramfs with no problems, however if I build a "HelloWorld"
>> > >> >> executable with the same compiler and try and run it I get an "Illegal
>> > >> >> Instruction" error. I build the test program using static linking, select
>> > >> >> the correct machine type and tune options but to no avail, I always get the
>> > >> >> illegal instruction.
>> > >>
>> > >> You need gcc 4.4 to get EABI working on ARMv4 and there are additional patches
>> > >> to gcc on top of gcc 4.4 see
>> > >> gcc-armv4-pass-fix-v4bx-to-ld.patch for gcc in OE. So as Koen suggested earlier
>> > >> if you try with OE compiler you might have better chance of getting it
>> > >> to work as many
>> > >> OE devs have tried it.
>> > >> btw. are you passing march=armv4 to the compiler when doing the compile ?
>> > >
>> > > >From my understanding of this issue he has an OABI rootfs and is trying
>> > > to run an EABI executable on top of it. This just doesn't work period
>> > > AFAIK; the kernel can boot either OABI or EABI with the compatibility
>> > > flags config'd in, but all of the binaries on the filesystem must match.
>> > >
>> > > I'll have to look into the patch that you referenced above because I
>> > > have been using EABI (built through OE) for both the kernel and
>> > > filesystem with armv4t for a few years now. First w/ GCC 4.1.1 and now
>> > > with 4.2.4 and I've never run into issues. Does the issue only manifest
>> > > in certain situations?
>> >
>> > Well you said armv4t thats a whole different story than armv4 (without
>> > 't') for EABI
>> > AFAICT SA1110 is based on ARMv4 not ARMv4t.
>>
>> You are correct, my mistake.
>
> I have built a EABI rootfs but I get a kernel panic when it attempts
> to run init, hence my attempts to verify my EABI executables on a OABI
> fs.
>
> Perhaps it's time for me to try the OE EABI compiler. Can you advise me
> on which OE recipes to use for this?

use 4.4.2 or 4.4.3

>
> Regards,
>
> Pete
>
>
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