# (C) Copyright 2000-2002
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
-# See file CREDITS for list of people who contributed to this
-# project.
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
-# MA 02111-1307 USA
+# SPDX-License-Identifier: GPL-2.0+
#
-CROSS_COMPILE ?= arm-linux-
-
ifndef CONFIG_STANDALONE_LOAD_ADDR
-ifeq ($(SOC),omap3)
+ifneq ($(CONFIG_ARCH_OMAP2PLUS),)
CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
else
CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
endif
endif
-PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
+CFLAGS_NON_EFI := -fno-pic -ffixed-r9 -ffunction-sections -fdata-sections
+CFLAGS_EFI := -fpic -fshort-wchar
+
+LDFLAGS_FINAL += --gc-sections
+PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
+ -fno-common -ffixed-r9
+PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \
+ $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+
+# LLVM support
+LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \
+ $(call cc-option,-target arm-none-eabi,) \
+ $(call cc-option,-arm-use-movt=0,)
+PLATFORM_RELFLAGS += $(LLVM_RELFLAGS)
+
+PLATFORM_CPPFLAGS += -D__ARM__
+
+ifdef CONFIG_ARM64
+PLATFORM_ELFFLAGS += -B aarch64 -O elf64-littleaarch64
+else
+PLATFORM_ELFFLAGS += -B arm -O elf32-littlearm
+endif
+
+# Choose between ARM/Thumb instruction sets
+ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
+AFLAGS_IMPLICIT_IT := $(call as-option,-Wa$(comma)-mimplicit-it=always)
+PF_CPPFLAGS_ARM := $(AFLAGS_IMPLICIT_IT) \
+ $(call cc-option, -mthumb -mthumb-interwork,\
+ $(call cc-option,-marm,)\
+ $(call cc-option,-mno-thumb-interwork,)\
+ )
+else
+PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
+ $(call cc-option,-mno-thumb-interwork,)
+endif
+
+# Only test once
+ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
+archprepare: checkthumb checkgcc6
+
+checkthumb:
+ @if test "$(call cc-name)" = "gcc" -a \
+ "$(call cc-version)" -lt "0404"; then \
+ echo -n '*** Your GCC does not produce working '; \
+ echo 'binaries in THUMB mode.'; \
+ echo '*** Your board is configured for THUMB mode.'; \
+ false; \
+ fi
+else
+archprepare: checkgcc6
+endif
+
+checkgcc6:
+ @if test "$(call cc-name)" = "gcc" -a \
+ "$(call cc-version)" -lt "0600"; then \
+ echo '*** Your GCC is older than 6.0 and is not supported'; \
+ false; \
+ fi
-# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
-PLATFORM_CPPFLAGS += $(call cc-option,-marm,)
# Try if EABI is supported, else fall back to old API,
# i. e. for example:
# - with ELDK 4.2 (EABI supported), use:
-# -mabi=aapcs-linux -mno-thumb-interwork
+# -mabi=aapcs-linux
# - with ELDK 4.1 (gcc 4.x, no EABI), use:
-# -mabi=apcs-gnu -mno-thumb-interwork
+# -mabi=apcs-gnu
# - with ELDK 3.1 (gcc 3.x), use:
-# -mapcs-32 -mno-thumb-interwork
-PLATFORM_CPPFLAGS += $(call cc-option,\
- -mabi=aapcs-linux -mno-thumb-interwork,\
+# -mapcs-32
+PF_CPPFLAGS_ABI := $(call cc-option,\
+ -mabi=aapcs-linux,\
+ $(call cc-option,\
+ -mapcs-32,\
$(call cc-option,\
- -mapcs-32,\
- $(call cc-option,\
- -mabi=apcs-gnu,\
- )\
- ) $(call cc-option,-mno-thumb-interwork,)\
- )
+ -mabi=apcs-gnu,\
+ )\
+ )\
+ )
+PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI)
# For EABI, make sure to provide raise()
ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
# times. Also, the prefix needs to be different based on whether
# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
# before adding the correct one.
-ifdef CONFIG_SPL_BUILD
-PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \
- $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
-else
-PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \
- $(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
+PLATFORM_LIBS := arch/arm/lib/eabi_compat.o \
+ $(filter-out arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
+endif
+
+# needed for relocation
+LDFLAGS_u-boot += -pie
+
+#
+# FIXME: binutils versions < 2.22 have a bug in the assembler where
+# branches to weak symbols can be incorrectly optimized in thumb mode
+# to a short branch (b.n instruction) that won't reach when the symbol
+# gets preempted
+#
+# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
+#
+ifeq ($(CONFIG_$(SPL_)SYS_THUMB_BUILD),y)
+ifeq ($(GAS_BUG_12532),)
+export GAS_BUG_12532:=$(shell if [ $(call binutils-version) -lt 0222 ] ; \
+ then echo y; else echo n; fi)
endif
+ifeq ($(GAS_BUG_12532),y)
+PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
+endif
+endif
+
+ifneq ($(CONFIG_SPL_BUILD),y)
+# Check that only R_ARM_RELATIVE relocations are generated.
+ALL-y += checkarmreloc
+# The movt / movw can hardcode 16 bit parts of the addresses in the
+# instruction. Relocation is not supported for that case, so disable
+# such usage by requiring word relocations.
+PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations)
+PLATFORM_CPPFLAGS += $(call cc-option, -fno-pic)
endif
-ifdef CONFIG_SYS_LDSCRIPT
-# need to strip off double quotes
-LDSCRIPT := $(subst ",,$(CONFIG_SYS_LDSCRIPT))
+# limit ourselves to the sections we want in the .bin.
+ifdef CONFIG_ARM64
+OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
+ -j .u_boot_list -j .rela.dyn -j .got -j .got.plt \
+ -j .binman_sym_table
else
-LDSCRIPT := $(SRCTREE)/$(CPUDIR)/u-boot.lds
+OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
+ -j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn \
+ -j .binman_sym_table
endif
-# needed for relocation
-ifndef CONFIG_NAND_SPL
-LDFLAGS_u-boot += -pie
+# if a dtb section exists we always have to include it
+# there are only two cases where it is generated
+# 1) OF_EMBEDED is turned on
+# 2) unit tests include device tree blobs
+OBJCOPYFLAGS += -j .dtb.init.rodata
+
+ifdef CONFIG_EFI_LOADER
+OBJCOPYFLAGS += -j .efi_runtime -j .efi_runtime_rel
+endif
+
+ifneq ($(CONFIG_IMX_CONFIG),)
+ifdef CONFIG_SPL
+ifndef CONFIG_SPL_BUILD
+ALL-y += SPL
+endif
+else
+ifeq ($(CONFIG_OF_SEPARATE),y)
+ALL-y += u-boot-dtb.imx
+else
+ALL-y += u-boot.imx
+endif
+endif
+ifneq ($(CONFIG_VF610),)
+ALL-y += u-boot.vyb
endif
+endif
+
+EFI_LDS := elf_arm_efi.lds
+EFI_CRT0 := crt0_arm_efi.o
+EFI_RELOC := reloc_arm_efi.o
projects / u-boot / blobdiff