[PATCH 7/9] powerpc/ps3: Add check for otheros image size

[Geoff Levand]

Hi Geert,

On 3/29/20 7:00 AM, Geert Uytterhoeven wrote:
>> --- a/arch/powerpc/boot/wrapper
>> +++ b/arch/powerpc/boot/wrapper
>>
>>      odir="$(dirname "$ofile.bin")"
>> -    rm -f "$odir/otheros.bld"
>> -    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
>> +
>> +    # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
>> +    # image.  If a compressed image that exceeded this limit is written to
>> +    # flash the loader will decompress that image until the 16 MiB limit is
>> +    # reached, then enter the system reset vector of the partially decompressed
>> +    # image.  No warning is issued.
>> +    rm -f "$odir"/{otheros,otheros-too-big}.bld
>> +    size=$(${CROSS}nm --no-sort --radix=d "$ofile" | egrep ' _end$' | cut -d' ' -f1)
>> +    bld="otheros.bld"
>> +    [ $size -le 16777216 ] || bld="otheros-too-big.bld"
>> +    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
>>      ;;
>>  esac
> 
> Why not print an error message and exit 1 instead, like is done for
> other fatal errors?

This is not really a fatal error for the entire build.  The default
make target will build both a vmlinux file and a .bld file.  The
.bld file is the one that can be programmed to the OtherOS flash
memory (bld = boot loader).  Even if the .bld file is too big, a
big vmlinux file from such a build would be completely fine for
petitboot to load.

It may be good to print an 'info' message though.  I'll post an
updated patch.

-Geoff