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_OMAP_COMMON),) 10 CONFIG_STANDALONE_LOAD_ADDR = 0x80300000 11 else 12 CONFIG_STANDALONE_LOAD_ADDR = 0xc100000 13 endif 14 endif 15 16 LDFLAGS_FINAL += --gc-sections 17 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ 18 -fno-common -ffixed-r9 19 PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ 20 $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) 21 22 # LLVM support 23 LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \ 24 $(call cc-option,-target arm-none-eabi,) \ 25 $(call cc-option,-arm-use-movt=0,) 26 PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) 27 28 PLATFORM_CPPFLAGS += -D__ARM__ 29 30 # Choose between ARM/Thumb instruction sets 31 ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 32 AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always) 33 PF_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 ) 38 else 39 PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ 40 $(call cc-option,-mno-thumb-interwork,) 41 endif 42 43 # Only test once 44 ifneq ($(CONFIG_SPL_BUILD),y) 45 ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 46 archprepare: checkthumb 47 48 checkthumb: 49 @if test "$(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 56 endif 57 endif 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 67 PF_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 ) 76 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) 77 78 # For EABI, make sure to provide raise() 79 ifneq (,$(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. 84 PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \ 85 $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS)) 86 endif 87 88 # needed for relocation 89 LDFLAGS_u-boot += -pie 90 91 # 92 # FIXME: binutils versions < 2.22 have a bug in the assembler where 93 # branches to weak symbols can be incorrectly optimized in thumb mode 94 # to a short branch (b.n instruction) that won't reach when the symbol 95 # gets preempted 96 # 97 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532 98 # 99 ifeq ($(CONFIG_SYS_THUMB_BUILD),y) 100 ifeq ($(GAS_BUG_12532),) 101 export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \ 102 then echo y; else echo n; fi) 103 endif 104 ifeq ($(GAS_BUG_12532),y) 105 PLATFORM_RELFLAGS += -fno-optimize-sibling-calls 106 endif 107 endif 108 109 ifneq ($(CONFIG_SPL_BUILD),y) 110 # Check that only R_ARM_RELATIVE relocations are generated. 111 ALL-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. 115 PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) 116 PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic) 117 endif 118 119 # limit ourselves to the sections we want in the .bin. 120 ifdef CONFIG_ARM64 121 OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn 122 else 123 OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \ 124 -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn 125 endif 126 127 ifdef CONFIG_OF_EMBED 128 OBJCOPYFLAGS += -j .dtb.init.rodata 129 endif 130 131 ifdef CONFIG_EFI_LOADER 132 OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel 133 endif 134 135 ifneq ($(CONFIG_IMX_CONFIG),) 136 ifdef CONFIG_SPL 137 ifndef CONFIG_SPL_BUILD 138 ALL-y += SPL 139 endif 140 else 141 ifeq ($(CONFIG_OF_SEPARATE),y) 142 ALL-y += u-boot-dtb.imx 143 else 144 ALL-y += u-boot.imx 145 endif 146 endif 147 endif 148