[Bug 225182] devel/powerpc64-xtoolchain-gcc: SLOF Data Storage Exception on boot with kernel built with devel/powerpc64-xtoolchain-gcc

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225182

--- Comment #26 from Kenneth Salerno <kennethsalerno at yahoo.com> ---
I have an update to this issue: when I set the CPU to POWER9 in QEMU, I get
different results than I had with POWER8. Now, instead of a Data Storage
Exception, I get the following message and a hang when building GENERIC64 with
gcc6:

...[normal boot]...
Error initializing RTAS (-1902)
...
run_interrupt_driven_hooks: still waiting after 60 seconds for 0x5f2888


I get this same error above if I build the GENERIC64 kernel with the system gcc
4.2 and simply disable DDB_CTF, or if I copy the GENERIC64 kernel and use
KERNCONF env.

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