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