u-boot/arch/arm/config.mk
Albert ARIBAUD 47ed5dd031 arm: keep all sections in ELF file
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>
2013-12-07 06:53:58 +01:00

108 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