Motorola Shared BSPs not Linking
joel.sherrill at OARcorp.com
Thu Feb 23 16:34:24 UTC 2012
On 02/23/2012 10:15 AM, Till Straumann wrote:
> My last build of 'master' still linked fine but that's been a while
> (7/2011, I believe).
That's a while back. :)
I did a git blame and nothing has changed recently. And
I saw nothing really changing since we merged the
> Could you provide the console messages when 'hello.exe' was
> linked along with a linker map?
I will send you my entire build log privately.
But it looks like the beatnik BSP and others reference
preload.S as part of their startup asm. motorola_shared
does not. But that has been part of that BSP forever.
I just don't see what changed.
> - Till
> On 02/23/2012 03:17 PM, Ralf Corsepius wrote:
>> On 02/22/2012 05:54 PM, Joel Sherrill wrote:
>>> Just came across this in the build logs and unfortunately
>>> don't have time to investigate. This was on the mcp750
>>> but every motorola_shared variant fails the same way.
>>> powerpc-rtems4.11-objcopy -O binary -R .comment -S hello.exe rtems
>>> gzip -vf9 rtems
>>> rtems: 55.1% -- replaced with rtems.gz
>>> powerpc-rtems4.11-ld -o hello.ralf
>>> ../../../../../mcp750/lib/bootloader.o --just-symbols=hello.exe -b
>>> binary rtems.gz -T ../../../../../mcp750/lib/ppcboot.lds -Map hello.map
>>> && chmod 755 hello.exe
>>> ../../../../../mcp750/lib/ppcboot.lds:97: undefined symbol
>>> `__rtems_start' referenced in expression
>> I can reproduce this.
>>> Anyone have any ideas or fixes?
>> The only place in rtems.git which provides a symbol named __rtems_start
>> is c/src/lib/libbsp/powerpc/shared/start/vectors_entry.S
>> However, this file doesn't seem to be referenced by the mcp750 BSP nor
>> by the motorola_powerpc:
>> # grep -R shared/start/vectors_entry.S
>> c/src/lib/libbsp/powerpc/beatnik/Makefile.am:EXTRA_DIST +=
>> += ../../powerpc/shared/start/vectors_entry.S
>> c/src/lib/libbsp/powerpc/mvme3100/Makefile.am:EXTRA_DIST +=
>> Seems to me, as if some of the powerpc exception/irq "generalizations"
>> broke something.
>> I am not sufficiently familiar with how this is supposed to work to be
>> able to provide a fix.
>> rtems-users mailing list
>> rtems-users at rtems.org
Joel Sherrill, Ph.D. Director of Research& Development
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