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Makefile.inc: Add separate bootblock.raw.elf with allocatable BSS 

This patch moves the objcopy invocation that changes the bootblock's
section flags to make sure .data and .bss are preserved in the binary
image from the generation of bootblock.raw.bin into a separate
bootblock.raw.elf file. Some SoCs (like SDM845) like to have an ELF
rather than a raw binary as input to their masked ROM wrapper
generation script.

Also move those objcopy flags out into a variable because I'll need them
again in a later patch.

Change-Id: I9557b184df7f753a442c7e0ceb58e81c5e19f2c5
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/26338
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Julius Werner 2018-05-15 17:36:59 -07:00
parent 88f4e08acf
commit 1ca26664e6
1 changed files with 9 additions and 4 deletions
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13
Makefile.inc
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@ -623,11 +623,16 @@ find-class = $(if $(filter $(1),$(basename $(1))),$(if $(CC_$(1)), $(1), $(call
# include the bss section in the binary so the BootROM clears the bss on
# loading of the bootblock stage. Achieve this by marking the bss section
# loadable,allocatable, and data. Do the same for the .data section in case
# it's marked as NOBITS.
$(objcbfs)/bootblock.raw.bin: $(objcbfs)/bootblock.elf
# the linker marked it NOBITS automatically because there are only zeroes in it.
preserve-bss-flags := --set-section-flags .bss=load,alloc,data --set-section-flags .data=load,alloc,data
$(objcbfs)/bootblock.raw.elf: $(objcbfs)/bootblock.elf
@printf " OBJCOPY $(notdir $(@))\n"
$(OBJCOPY_bootblock) --set-section-flags .bss=load,alloc,data --set-section-flags .data=load,alloc,data $< $<.tmp
$(OBJCOPY_bootblock) -O binary $<.tmp $@
$(OBJCOPY_bootblock) $(preserve-bss-flags) $< $@
$(objcbfs)/bootblock.raw.bin: $(objcbfs)/bootblock.raw.elf
@printf " OBJCOPY $(notdir $(@))\n"
$(OBJCOPY_bootblock) -O binary $< $@
$(objcbfs)/%.bin: $(objcbfs)/%.raw.bin
cp $< $@