pc386 BSP/master branch build failure with smp enabled.

Karel Gardas karel.gardas at centrum.cz
Sat Sep 12 12:39:01 UTC 2020

On 9/12/20 9:28 AM, Karel Gardas wrote:
> On 9/12/20 6:59 AM, Gedare Bloom wrote:
>> On Fri, Sep 11, 2020 at 11:53 AM Karel Gardas <karel.gardas at centrum.cz> wrote:
>>> On 9/11/20 6:16 PM, Gedare Bloom wrote:
>>>> Looks to be coming through
>>>> cpukit/score/cpu/i386/include/rtems/asm.h:157   movb
>>>> imps_apic_cpu_map(\REG),\REG        /* CPU ID in REG */
>>>> The assembler is right to complain. movb has to target one of the
>>>> 1-byte mnemonics, so this should be %al for the LSB of %eax. One needs
>>>> to check through this logic carefully, but I think the right thing to
>>>> do here is:
>>>> movzbl     imps_apic_cpu_map(\REG),\REG
>>>> That should do the trick. Can you test it locally?
>>> Sure! Builds fine and testsuite testing reveals:
>> Great. I opened #4076 to apply this fix on 5 branch.
> Wait a minute. I've thought 5 branch is perfectly fine. What's broken is
> master. Well, 5.1rc2 and 5.1 release were fine for SMP on pc386 so I
> expected 5 branch be too. -- Anyway, I'll test that for sure.

I've tested 5 branch and it compiles and works fine with SMP so the fix
is needed only on master branch.


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