1# 2# (C) Copyright 2000-2002 3# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4# 5# SPDX-License-Identifier: GPL-2.0+ 6# 7 8ifndef CONFIG_STANDALONE_LOAD_ADDR 9ifneq ($(CONFIG_ARCH_OMAP2),) 10CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 11else 12CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 13endif 14endif 15 16CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections 17CFLAGS_EFI := -fpic -fshort-wchar 18 19LDFLAGS_FINAL += --gc-sections 20PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ 21 -fno-common -ffixed-r9 22PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ 23 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) 24 25# LLVM support 26LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \ 27 $(call cc-option,-target arm-none-eabi,) \ 28 $(call cc-option,-arm-use-movt=0,) 29PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) 30 31PLATFORM_CPPFLAGS += -D__ARM__ 32 33# Choose between ARM/Thumb instruction sets 34ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 35AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 36PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 37 $(call cc-option, -mthumb -mthumb-interwork,\ 38 $(call cc-option,-marm,)\ 39 $(call cc-option,-mno-thumb-interwork,)\ 40 ) 41else 42PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 43 $(call cc-option,-mno-thumb-interwork,) 44endif 45 46# Only test once 47ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 48archprepare: checkthumb 49 50checkthumb: 51 @if test "$(call cc-name)" = "gcc" -a \ 52 "$(call cc-version)" -lt "0404"; then \ 53 echo -n '*** Your GCC does not produce working '; \ 54 echo 'binaries in THUMB mode.'; \ 55 echo '*** Your board is configured for THUMB mode.'; \ 56 false; \ 57 fi 58endif 59 60# Try if EABI is supported, else fall back to old API, 61# i. e. for example: 62# - with ELDK 4.2 (EABI supported), use: 63# -mabi=aapcs-linux 64# - with ELDK 4.1 (gcc 4.x, no EABI), use: 65# -mabi=apcs-gnu 66# - with ELDK 3.1 (gcc 3.x), use: 67# -mapcs-32 68PF_CPPFLAGS_ABI := $(call cc-option,\ 69 -mabi=aapcs-linux,\ 70 $(call cc-option,\ 71 -mapcs-32,\ 72 $(call cc-option,\ 73 -mabi=apcs-gnu,\ 74 )\ 75 )\ 76 ) 77PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 78 79# For EABI, make sure to provide raise() 80ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 81# This file is parsed many times, so the string may get added multiple 82# times. Also, the prefix needs to be different based on whether 83# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 84# before adding the correct one. 85PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 86 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 87endif 88 89# needed for relocation 90LDFLAGS_u-boot += -pie 91 92# 93# FIXME: binutils versions < 2.22 have a bug in the assembler where 94# branches to weak symbols can be incorrectly optimized in thumb mode 95# to a short branch (b.n instruction) that won't reach when the symbol 96# gets preempted 97# 98# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 99# 100ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 101ifeq ($(GAS_BUG_12532),) 102export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 103 then echo y; else echo n; fi) 104endif 105ifeq ($(GAS_BUG_12532),y) 106PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 107endif 108endif 109 110ifneq ($(CONFIG_SPL_BUILD),y) 111# Check that only R_ARM_RELATIVE relocations are generated. 112ALL-y += checkarmreloc 113# The movt / movw can hardcode 16 bit parts of the addresses in the 114# instruction. Relocation is not supported for that case, so disable 115# such usage by requiring word relocations. 116PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 117PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 118endif 119 120# limit ourselves to the sections we want in the .bin. 121ifdef CONFIG_ARM64 122OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ 123 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt 124else 125OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 126 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn 127endif 128 129ifdef CONFIG_OF_EMBED 130OBJCOPYFLAGS += -j .dtb.init.rodata 131endif 132 133ifdef CONFIG_EFI_LOADER 134OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 135endif 136 137ifneq ($(CONFIG_IMX_CONFIG),) 138ifdef CONFIG_SPL 139ifndef CONFIG_SPL_BUILD 140ALL-y += SPL 141endif 142else 143ifeq ($(CONFIG_OF_SEPARATE),y) 144ALL-y += u-boot-dtb.imx 145else 146ALL-y += u-boot.imx 147endif 148endif 149ifneq ($(CONFIG_VF610),) 150ALL-y += u-boot.vyb 151endif 152endif 153 154EFI_LDS := elf_arm_efi.lds 155EFI_CRT0 := crt0_arm_efi.o 156EFI_RELOC := reloc_arm_efi.o 157