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- #
- # (C) Copyright 2000-2002
- # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- #
- # SPDX-License-Identifier: GPL-2.0+
- #
- CROSS_COMPILE ?= arm-linux-
- ifndef CONFIG_STANDALONE_LOAD_ADDR
- ifneq ($(CONFIG_OMAP_COMMON),)
- CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
- else
- CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
- endif
- endif
- LDFLAGS_FINAL += --gc-sections
- PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
- -fno-common -ffixed-r9
- PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
- $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
- # Support generic board on ARM
- __HAVE_ARCH_GENERIC_BOARD := y
- PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
- # Choose between ARM/Thumb instruction sets
- ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
- PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\
- $(call cc-option,-marm,)\
- $(call cc-option,-mno-thumb-interwork,)\
- )
- else
- PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
- $(call cc-option,-mno-thumb-interwork,)
- endif
- # Only test once
- ifneq ($(CONFIG_SPL_BUILD),y)
- ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb
- endif
- # Try if EABI is supported, else fall back to old API,
- # i. e. for example:
- # - with ELDK 4.2 (EABI supported), use:
- # -mabi=aapcs-linux
- # - with ELDK 4.1 (gcc 4.x, no EABI), use:
- # -mabi=apcs-gnu
- # - with ELDK 3.1 (gcc 3.x), use:
- # -mapcs-32
- PF_CPPFLAGS_ABI := $(call cc-option,\
- -mabi=aapcs-linux,\
- $(call cc-option,\
- -mapcs-32,\
- $(call cc-option,\
- -mabi=apcs-gnu,\
- )\
- )\
- )
- PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
- # For EABI, make sure to provide raise()
- ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
- # This file is parsed many times, so the string may get added multiple
- # times. Also, the prefix needs to be different based on whether
- # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
- # before adding the correct one.
- ifdef CONFIG_SPL_BUILD
- PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \
- $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
- else
- PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \
- $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
- endif
- endif
- # needed for relocation
- LDFLAGS_u-boot += -pie
- #
- # FIXME: binutils versions < 2.22 have a bug in the assembler where
- # branches to weak symbols can be incorrectly optimized in thumb mode
- # to a short branch (b.n instruction) that won't reach when the symbol
- # gets preempted
- #
- # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
- #
- ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
- ifeq ($(GAS_BUG_12532),)
- export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
- then echo y; else echo n; fi)
- endif
- ifeq ($(GAS_BUG_12532),y)
- PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
- endif
- endif
- ifneq ($(CONFIG_SPL_BUILD),y)
- # Check that only R_ARM_RELATIVE relocations are generated.
- ALL-y += checkarmreloc
- # The movt / movw can hardcode 16 bit parts of the addresses in the
- # instruction. Relocation is not supported for that case, so disable
- # such usage by requiring word relocations.
- PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
- endif
- # limit ourselves to the sections we want in the .bin.
- ifdef CONFIG_ARM64
- OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn
- else
- OBJCOPYFLAGS += -j .text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn
- endif
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