[coreboot-gerrit] Patch merged into coreboot/master: linking: link bootblock.elf with .data and .bss sections again

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit d972f78e759ffccf9187ab3f3b00b567c7f30f53
Author: Aaron Durbin <adurbin at chromium.org>
Date:   Thu Sep 17 17:02:53 2015 -0500

    linking: link bootblock.elf with .data and .bss sections again
    
    Currently coreboot expects the loader to clear the bss section
    for all stages. i.e. stages don't clear their own bss. On ARM
    SoCs the BootROM would be responsible for this. To do that
    one needs to include the bss section data (all zeros) in the
    bootblock.bin file. This was previously being attempted by
    keeping the .bss info in the .data section because objcopy
    happened zero out non-file allocated data section data.
    
    Instead go back to linking bootblock with the bss section
    but mark the bss section as loadable allocatable data. That
    way it will be included in the binary properly when objcopy
    -O binary is emplyed. Also do the same for the data section
    in the case of no non-zero object values are in the data
    section.
    
    Without this change the trick of including .bss in .data
    was not working when there wasn't a non-zero value object
    in the data section.
    
    BUG=None
    BRANCH=None
    TEST=Built emulation/qemu-armv7 and noted bootblock.bin contains
         the cleared bss.
    
    Change-Id: I94bd404c2c4a8b9332393e6224e98940a9cad4a2
    Signed-off-by: Aaron Durbin <adurbin at chromium.org>
    Reviewed-on: http://review.coreboot.org/11680
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi <pgeorgi at google.com>


See http://review.coreboot.org/11680 for details.

-gerrit