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u-boot.elf: allow overriding entry symbol

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LD gives the following warning when trying to process u-boot-elf.o
warning: cannot find entry symbol __start; defaulting to 0000000080010000
According to gnu-libc the entry symbol for mips is __start and not _start:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/mips/dl-machine.h;h=ed47513ccc1d23d23d32ee640053d2f351f3990b;hb=HEAD#l258

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Álvaro Fernández Rojas 2017-04-20 20:36:26 +02:00 committed by Daniel Schwierzeck
parent d57259b950
commit 96ee1ada5d
1 changed files with 4 additions and 1 deletions
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5
Makefile
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@ -1184,10 +1184,13 @@ u-boot-img-spl-at-end.bin: u-boot.img spl/u-boot-spl.bin FORCE
$(call if_changed,pad_cat)
# Create a new ELF from a raw binary file.
ifndef PLATFORM_ELFENTRY
PLATFORM_ELFENTRY = "_start"
endif
u-boot.elf: u-boot.bin
@$(OBJCOPY) -I binary $(PLATFORM_ELFFLAGS) $< u-boot-elf.o
@$(LD) u-boot-elf.o -o $@ \
--defsym=_start=$(CONFIG_SYS_TEXT_BASE) \
--defsym=$(PLATFORM_ELFENTRY)=$(CONFIG_SYS_TEXT_BASE) \
-Ttext=$(CONFIG_SYS_TEXT_BASE)
# Rule to link u-boot