[coreboot] GCC update broke AMD Fam10h boot

Timothy Pearson tpearson at raptorengineeringinc.com
Mon Mar 16 19:39:04 CET 2015

On 03/16/2015 09:23 AM, Aaron Durbin wrote:
> On Sun, Mar 15, 2015 at 2:04 PM, Timothy Pearson
> <tpearson at raptorengineeringinc.com>  wrote:
>> All,
>> Just a heads up as there is no bugtracker for this project.  GIT commit
>> 53c388fe, which updates the crossgcc GCC version from 4.8.3 to 4.9.2, breaks
>> ramstage on AMD Fam10h systems (ramstage loads, sends its 0x39 POST code,
>> but then goes into an infinite loop).  Downgrading the GCC version repairs
>> the boot failure.
>> Not sure if you want to revert that commit until someone can figure out what
>> changed to cause the problem.
> Could post ramstage.elf from the two different builds somewhere? I'd
> like to take a peak at what is in there.


Other oddities:
GCC 4.8.3:
normal/romstage                0x7ff80    stage        97345
normal/ramstage                0x97c40    stage        154869

GCC 4.9.2:
normal/romstage                0x7ff80    stage        94773
normal/ramstage                0x97240    stage        173942

Note in particular, judging from the file sizes, that something seems to 
have been relocated from romstage to ramstage by the new gcc version.

Timothy Pearson
Raptor Engineering
+1 (415) 727-8645

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