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https://github.com/brain-hackers/u-boot-brain
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04380c651a
The code handles relocation entries with the following relocation types only: mips32: R_MIPS_REL32 mips64: R_MIPS_REL+R_MIPS_64 xburst: R_MIPS_REL32 Other relocation entries are skipped without processing. The code must be extended if other relocation types must be supported. Add -pie to LDFLAGS_FINAL to generate the .rel.dyn fixup table, which will be applied to the relocated image before transferring control to it. The CONFIG_NEEDS_MANUAL_RELOC is not needed after the patch, so remove that as well. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
70 lines
2.3 KiB
Makefile
70 lines
2.3 KiB
Makefile
#
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# (C) Copyright 2003
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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CROSS_COMPILE ?= mips_4KC-
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# Handle special prefix in ELDK 4.0 toolchain
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ifneq (,$(findstring 4KCle,$(CROSS_COMPILE)))
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ENDIANNESS := -EL
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endif
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ifdef CONFIG_SYS_LITTLE_ENDIAN
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ENDIANNESS := -EL
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endif
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ifdef CONFIG_SYS_BIG_ENDIAN
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ENDIANNESS := -EB
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endif
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# Default to EB if no endianess is configured
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ENDIANNESS ?= -EB
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PLATFORM_CPPFLAGS += -DCONFIG_MIPS -D__MIPS__
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#
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# From Linux arch/mips/Makefile
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#
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# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
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# code since it only slows down the whole thing. At some point we might make
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# use of global pointer optimizations but their use of $28 conflicts with
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# the current pointer optimization.
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#
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# The DECStation requires an ECOFF kernel for remote booting, other MIPS
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# machines may also. Since BFD is incredibly buggy with respect to
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# crossformat linking we rely on the elf2ecoff tool for format conversion.
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#
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# cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
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# cflags-y += -msoft-float
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# LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
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# MODFLAGS += -mlong-calls
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#
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# On the other hand, we want PIC in the U-Boot code to relocate it from ROM
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# to RAM. $28 is always used as gp.
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#
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PLATFORM_CPPFLAGS += -G 0 -mabicalls -fpic $(ENDIANNESS)
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PLATFORM_CPPFLAGS += -msoft-float
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PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib $(ENDIANNESS)
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
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LDFLAGS_FINAL += --gc-sections -pie
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OBJCFLAGS += --remove-section=.dynsym
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