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_OMAP2PLUS),) 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 26LLVM_RELFLAGS := $(call cc-option,-mllvm,) \ 27 $(call cc-option,-mno-movt,) 28PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) 29 30PLATFORM_CPPFLAGS += -D__ARM__ 31 32ifdef CONFIG_ARM64 33PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64 34else 35PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm 36endif 37 38# Choose between ARM/Thumb instruction sets 39ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 40AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 41PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 42 $(call cc-option, -mthumb -mthumb-interwork,\ 43 $(call cc-option,-marm,)\ 44 $(call cc-option,-mno-thumb-interwork,)\ 45 ) 46else 47PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 48 $(call cc-option,-mno-thumb-interwork,) 49endif 50 51# Only test once 52ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 53archprepare: checkthumb checkgcc6 54 55checkthumb: 56 @if test "$(call cc-name)" = "gcc" -a \ 57 "$(call cc-version)" -lt "0404"; then \ 58 echo -n '*** Your GCC does not produce working '; \ 59 echo 'binaries in THUMB mode.'; \ 60 echo '*** Your board is configured for THUMB mode.'; \ 61 false; \ 62 fi 63else 64archprepare: checkgcc6 65endif 66 67checkgcc6: 68 @if test "$(call cc-name)" = "gcc" -a \ 69 "$(call cc-version)" -lt "0600"; then \ 70 echo '*** Your GCC is older than 6.0 and is not supported'; \ 71 false; \ 72 fi 73 74 75# Try if EABI is supported, else fall back to old API, 76# i. e. for example: 77# - with ELDK 4.2 (EABI supported), use: 78# -mabi=aapcs-linux 79# - with ELDK 4.1 (gcc 4.x, no EABI), use: 80# -mabi=apcs-gnu 81# - with ELDK 3.1 (gcc 3.x), use: 82# -mapcs-32 83PF_CPPFLAGS_ABI := $(call cc-option,\ 84 -mabi=aapcs-linux,\ 85 $(call cc-option,\ 86 -mapcs-32,\ 87 $(call cc-option,\ 88 -mabi=apcs-gnu,\ 89 )\ 90 )\ 91 ) 92PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 93 94# For EABI, make sure to provide raise() 95ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 96# This file is parsed many times, so the string may get added multiple 97# times. Also, the prefix needs to be different based on whether 98# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 99# before adding the correct one. 100PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 101 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 102endif 103 104# needed for relocation 105LDFLAGS_u-boot += -pie 106 107# 108# FIXME: binutils versions < 2.22 have a bug in the assembler where 109# branches to weak symbols can be incorrectly optimized in thumb mode 110# to a short branch (b.n instruction) that won't reach when the symbol 111# gets preempted 112# 113# http://sourceware.org/bugzilla/show_bug.cgi?id=12532 114# 115ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 116ifeq ($(GAS_BUG_12532),) 117export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 118 then echo y; else echo n; fi) 119endif 120ifeq ($(GAS_BUG_12532),y) 121PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 122endif 123endif 124 125ifneq ($(CONFIG_SPL_BUILD),y) 126# Check that only R_ARM_RELATIVE relocations are generated. 127ALL-y += checkarmreloc 128# The movt / movw can hardcode 16 bit parts of the addresses in the 129# instruction. Relocation is not supported for that case, so disable 130# such usage by requiring word relocations. 131PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 132PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 133endif 134 135# limit ourselves to the sections we want in the .bin. 136ifdef CONFIG_ARM64 137OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ 138 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt \ 139 -j .binman_sym_table 140else 141OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 142 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \ 143 -j .binman_sym_table 144endif 145 146# if a dtb section exists we always have to include it 147# there are only two cases where it is generated 148# 1) OF_EMBEDED is turned on 149# 2) unit tests include device tree blobs 150OBJCOPYFLAGS += -j .dtb.init.rodata 151 152ifdef CONFIG_EFI_LOADER 153OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 154endif 155 156ifneq ($(CONFIG_IMX_CONFIG),) 157ifdef CONFIG_SPL 158ifndef CONFIG_SPL_BUILD 159ALL-y += SPL 160endif 161else 162ifeq ($(CONFIG_OF_SEPARATE),y) 163ALL-y += u-boot-dtb.imx 164else 165ALL-y += u-boot.imx 166endif 167endif 168ifneq ($(CONFIG_VF610),) 169ALL-y += u-boot.vyb 170endif 171endif 172 173EFI_LDS := elf_arm_efi.lds 174EFI_CRT0 := crt0_arm_efi.o 175EFI_RELOC := reloc_arm_efi.o 176