mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-10 13:16:16 +09:00
47ed5dd031
Current LDS files /DISCARD/ a lot of sections when linking ELF files, causing diagnostic tools such as readelf or objdump to produce partial output. Keep all section at link stage, filter only at objcopy time so that .bin remains minimal. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net> Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
109 lines
3.1 KiB
Makefile
109 lines
3.1 KiB
Makefile
#
|
|
# (C) Copyright 2000-2002
|
|
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
#
|
|
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
|
|
CROSS_COMPILE ?= arm-linux-
|
|
|
|
ifndef CONFIG_STANDALONE_LOAD_ADDR
|
|
ifneq ($(CONFIG_OMAP_COMMON),)
|
|
CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
|
|
else
|
|
CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
|
|
endif
|
|
endif
|
|
|
|
LDFLAGS_FINAL += --gc-sections
|
|
PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
|
|
-fno-common -ffixed-r9 -msoft-float
|
|
|
|
# Support generic board on ARM
|
|
__HAVE_ARCH_GENERIC_BOARD := y
|
|
|
|
PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
|
|
|
|
# Choose between ARM/Thumb instruction sets
|
|
ifeq ($(CONFIG_SYS_THUMB_BUILD),y)
|
|
PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\
|
|
$(call cc-option,-marm,)\
|
|
$(call cc-option,-mno-thumb-interwork,)\
|
|
)
|
|
else
|
|
PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
|
|
$(call cc-option,-mno-thumb-interwork,)
|
|
endif
|
|
|
|
# Only test once
|
|
ifneq ($(CONFIG_SPL_BUILD),y)
|
|
ALL-$(CONFIG_SYS_THUMB_BUILD) += checkthumb
|
|
endif
|
|
|
|
# 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
|
|
# - with ELDK 4.1 (gcc 4.x, no EABI), use:
|
|
# -mabi=apcs-gnu
|
|
# - with ELDK 3.1 (gcc 3.x), use:
|
|
# -mapcs-32
|
|
PF_CPPFLAGS_ABI := $(call cc-option,\
|
|
-mabi=aapcs-linux,\
|
|
$(call cc-option,\
|
|
-mapcs-32,\
|
|
$(call cc-option,\
|
|
-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)))
|
|
# This file is parsed many times, so the string may get added multiple
|
|
# 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, $(PLATFORM_LIBS))
|
|
endif
|
|
endif
|
|
|
|
# needed for relocation
|
|
LDFLAGS_u-boot += -pie
|
|
|
|
#
|
|
# FIXME: binutils versions < 2.22 have a bug in the assembler where
|
|
# branches to weak symbols can be incorrectly optimized in thumb mode
|
|
# to a short branch (b.n instruction) that won't reach when the symbol
|
|
# gets preempted
|
|
#
|
|
# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
|
|
#
|
|
ifeq ($(CONFIG_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)
|
|
endif
|
|
|
|
# limit ourselves to the sections we want in the .bin.
|
|
OBJCFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rel.dyn
|