mirror of
https://github.com/u-boot/u-boot.git
synced 2024-12-02 09:03:27 +08:00
0f20bb601f
Disable sibling call optimization based on binutils version. This is to work around a bug in the assember in binutils versions < 2.22. 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 Signed-off-by: Allen Martin <amartin@nvidia.com> Acked-by: Tom Rini <trini@ti.com>
108 lines
3.1 KiB
Makefile
108 lines
3.1 KiB
Makefile
#
|
|
# (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
|
|
#
|
|
|
|
CROSS_COMPILE ?= arm-linux-
|
|
|
|
ifndef CONFIG_STANDALONE_LOAD_ADDR
|
|
ifeq ($(SOC),omap3)
|
|
CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
|
|
else
|
|
CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
|
|
endif
|
|
endif
|
|
|
|
PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
|
|
|
|
# Choose between ARM/Thumb instruction sets
|
|
ifeq ($(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, $(PLATFORM_LIBS))
|
|
endif
|
|
endif
|
|
|
|
# needed for relocation
|
|
ifndef CONFIG_NAND_SPL
|
|
LDFLAGS_u-boot += -pie
|
|
endif
|
|
|
|
#
|
|
# FIXME: binutils versions < 2.22 have a bug in the assembler where
|
|
# branches to weak symbols can be incorrectly optimized in thumb mode
|
|
# to a short branch (b.n instruction) that won't reach when the symbol
|
|
# gets preempted
|
|
#
|
|
# http://sourceware.org/bugzilla/show_bug.cgi?id=12532
|
|
#
|
|
ifeq ($(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
|