mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
3a649407a4
Today, we have cases where we wish to build all of U-Boot in Thumb2 mode for various reasons. We also have cases where we only build SPL in Thumb2 mode due to size constraints and wish to build the rest of the system in ARM mode. So in this migration we introduce a new symbol as well, SPL_SYS_THUMB_BUILD to control if we build everything or just SPL (or in theory, just U-Boot) in Thumb2 mode. Signed-off-by: Tom Rini <trini@konsulko.com> Acked-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
157 lines
4.3 KiB
Makefile
157 lines
4.3 KiB
Makefile
#
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# (C) Copyright 2000-2002
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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ifndef CONFIG_STANDALONE_LOAD_ADDR
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ifneq ($(CONFIG_ARCH_OMAP2),)
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CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
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else
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CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
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endif
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endif
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CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections
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CFLAGS_EFI := -fpic -fshort-wchar
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LDFLAGS_FINAL += --gc-sections
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
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-fno-common -ffixed-r9
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PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
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$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
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# LLVM support
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LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \
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$(call cc-option,-target arm-none-eabi,) \
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$(call cc-option,-arm-use-movt=0,)
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PLATFORM_RELFLAGS += $(LLVM_RELFLAGS)
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PLATFORM_CPPFLAGS += -D__ARM__
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# Choose between ARM/Thumb instruction sets
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ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
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AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always)
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PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \
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$(call cc-option, -mthumb -mthumb-interwork,\
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$(call cc-option,-marm,)\
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$(call cc-option,-mno-thumb-interwork,)\
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)
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else
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PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
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$(call cc-option,-mno-thumb-interwork,)
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endif
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# Only test once
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ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
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archprepare: checkthumb
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checkthumb:
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@if test "$(call cc-name)" = "gcc" -a \
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"$(call cc-version)" -lt "0404"; then \
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echo -n '*** Your GCC does not produce working '; \
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echo 'binaries in THUMB mode.'; \
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echo '*** Your board is configured for THUMB mode.'; \
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false; \
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fi
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endif
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# Try if EABI is supported, else fall back to old API,
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# i. e. for example:
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# - with ELDK 4.2 (EABI supported), use:
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# -mabi=aapcs-linux
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# - with ELDK 4.1 (gcc 4.x, no EABI), use:
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# -mabi=apcs-gnu
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# - with ELDK 3.1 (gcc 3.x), use:
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# -mapcs-32
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PF_CPPFLAGS_ABI := $(call cc-option,\
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-mabi=aapcs-linux,\
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$(call cc-option,\
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-mapcs-32,\
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$(call cc-option,\
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-mabi=apcs-gnu,\
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)\
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)\
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)
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PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
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# For EABI, make sure to provide raise()
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ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
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# This file is parsed many times, so the string may get added multiple
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# times. Also, the prefix needs to be different based on whether
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# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
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# before adding the correct one.
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PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
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$(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
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endif
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# needed for relocation
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LDFLAGS_u-boot += -pie
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#
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# FIXME: binutils versions < 2.22 have a bug in the assembler where
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# branches to weak symbols can be incorrectly optimized in thumb mode
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# to a short branch (b.n instruction) that won't reach when the symbol
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# gets preempted
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#
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# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
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#
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ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
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ifeq ($(GAS_BUG_12532),)
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export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
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then echo y; else echo n; fi)
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endif
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ifeq ($(GAS_BUG_12532),y)
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PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
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endif
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endif
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ifneq ($(CONFIG_SPL_BUILD),y)
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# Check that only R_ARM_RELATIVE relocations are generated.
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ALL-y += checkarmreloc
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# The movt / movw can hardcode 16 bit parts of the addresses in the
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# instruction. Relocation is not supported for that case, so disable
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# such usage by requiring word relocations.
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PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
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PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
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endif
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# limit ourselves to the sections we want in the .bin.
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ifdef CONFIG_ARM64
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OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
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-j .u_boot_list -j .rela.dyn
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else
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OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
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-j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
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endif
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ifdef CONFIG_OF_EMBED
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OBJCOPYFLAGS += -j .dtb.init.rodata
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endif
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ifdef CONFIG_EFI_LOADER
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OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
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endif
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ifneq ($(CONFIG_IMX_CONFIG),)
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ifdef CONFIG_SPL
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ifndef CONFIG_SPL_BUILD
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ALL-y += SPL
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endif
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else
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ifeq ($(CONFIG_OF_SEPARATE),y)
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ALL-y += u-boot-dtb.imx
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else
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ALL-y += u-boot.imx
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endif
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endif
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ifneq ($(CONFIG_VF610),)
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ALL-y += u-boot.vyb
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endif
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endif
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EFI_LDS := elf_arm_efi.lds
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EFI_CRT0 := crt0_arm_efi.o
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EFI_RELOC := reloc_arm_efi.o
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