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 8 ifndef CONFIG_STANDALONE_LOAD_ADDR 9 ifneq ($(CONFIG_ARCH_OMAP2PLUS),) 10 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 11 else 12 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 13 endif 14 endif 15 16 CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections 17 CFLAGS_EFI := -fpic -fshort-wchar 18 19 LDFLAGS_FINAL += --gc-sections 20 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ 21 -fno-common -ffixed-r9 22 PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ 23 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) 24 25 # LLVM support 26 LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \ 27 $(call cc-option,-target arm-none-eabi,) \ 28 $(call cc-option,-arm-use-movt=0,) 29 PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) 30 31 PLATFORM_CPPFLAGS += -D__ARM__ 32 33 ifdef CONFIG_ARM64 34 PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64 35 else 36 PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm 37 endif 38 39 # Choose between ARM/Thumb instruction sets 40 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 41 AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 42 PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \ 43 $(call cc-option, -mthumb -mthumb-interwork,\ 44 $(call cc-option,-marm,)\ 45 $(call cc-option,-mno-thumb-interwork,)\ 46 ) 47 else 48 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 49 $(call cc-option,-mno-thumb-interwork,) 50 endif 51 52 # Only test once 53 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 54 archprepare: checkthumb checkgcc6 55 56 checkthumb: 57 @if test "$(call cc-name)" = "gcc" -a \ 58 "$(call cc-version)" -lt "0404"; then \ 59 echo -n '*** Your GCC does not produce working '; \ 60 echo 'binaries in THUMB mode.'; \ 61 echo '*** Your board is configured for THUMB mode.'; \ 62 false; \ 63 fi 64 else 65 archprepare: checkgcc6 66 endif 67 68 checkgcc6: 69 @if test "$(call cc-name)" = "gcc" -a \ 70 "$(call cc-version)" -lt "0600"; then \ 71 echo '*** Your GCC is older than 6.0 and is not supported'; \ 72 false; \ 73 fi 74 75 76 # Try if EABI is supported, else fall back to old API, 77 # i. e. for example: 78 # - with ELDK 4.2 (EABI supported), use: 79 # -mabi=aapcs-linux 80 # - with ELDK 4.1 (gcc 4.x, no EABI), use: 81 # -mabi=apcs-gnu 82 # - with ELDK 3.1 (gcc 3.x), use: 83 # -mapcs-32 84 PF_CPPFLAGS_ABI := $(call cc-option,\ 85 -mabi=aapcs-linux,\ 86 $(call cc-option,\ 87 -mapcs-32,\ 88 $(call cc-option,\ 89 -mabi=apcs-gnu,\ 90 )\ 91 )\ 92 ) 93 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 94 95 # For EABI, make sure to provide raise() 96 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) 97 # This file is parsed many times, so the string may get added multiple 98 # times. Also, the prefix needs to be different based on whether 99 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry 100 # before adding the correct one. 101 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 102 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 103 endif 104 105 # needed for relocation 106 LDFLAGS_u-boot += -pie 107 108 # 109 # FIXME: binutils versions < 2.22 have a bug in the assembler where 110 # branches to weak symbols can be incorrectly optimized in thumb mode 111 # to a short branch (b.n instruction) that won't reach when the symbol 112 # gets preempted 113 # 114 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532 115 # 116 ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y) 117 ifeq ($(GAS_BUG_12532),) 118 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 119 then echo y; else echo n; fi) 120 endif 121 ifeq ($(GAS_BUG_12532),y) 122 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 123 endif 124 endif 125 126 ifneq ($(CONFIG_SPL_BUILD),y) 127 # Check that only R_ARM_RELATIVE relocations are generated. 128 ALL-y += checkarmreloc 129 # The movt / movw can hardcode 16 bit parts of the addresses in the 130 # instruction. Relocation is not supported for that case, so disable 131 # such usage by requiring word relocations. 132 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 133 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 134 endif 135 136 # limit ourselves to the sections we want in the .bin. 137 ifdef CONFIG_ARM64 138 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \ 139 -j .u_boot_list -j .rela.dyn -j .got -j .got.plt \ 140 -j .binman_sym_table 141 else 142 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 143 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \ 144 -j .binman_sym_table 145 endif 146 147 # if a dtb section exists we always have to include it 148 # there are only two cases where it is generated 149 # 1) OF_EMBEDED is turned on 150 # 2) unit tests include device tree blobs 151 OBJCOPYFLAGS += -j .dtb.init.rodata 152 153 ifdef CONFIG_EFI_LOADER 154 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 155 endif 156 157 ifneq ($(CONFIG_IMX_CONFIG),) 158 ifdef CONFIG_SPL 159 ifndef CONFIG_SPL_BUILD 160 ALL-y += SPL 161 endif 162 else 163 ifeq ($(CONFIG_OF_SEPARATE),y) 164 ALL-y += u-boot-dtb.imx 165 else 166 ALL-y += u-boot.imx 167 endif 168 endif 169 ifneq ($(CONFIG_VF610),) 170 ALL-y += u-boot.vyb 171 endif 172 endif 173 174 EFI_LDS := elf_arm_efi.lds 175 EFI_CRT0 := crt0_arm_efi.o 176 EFI_RELOC := reloc_arm_efi.o 177