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# -*- makefile -*-
#
# arch/arm/MCONFIG
#
# Special rules for this architecture. Note that this is actually
# included from the main Makefile, and that pathnames should be
# accordingly.
#
CPU_ARCH ?= armv4
CPU_TUNE ?= strongarm
KLIBCOPTFLAGS += -Os -march=$(CPU_ARCH) -mtune=$(CPU_TUNE)
KLIBCBITSIZE = 32
KLIBCREQFLAGS += -fno-exceptions
KLIBCSTRIPFLAGS += -R .ARM.exidx
ifeq ($(CONFIG_KLIBC_THUMB),y)
CPU_ARCH := $(CPU_ARCH)t
KLIBCREQFLAGS += -mthumb
KLIBCREQFLAGS += -mabi=aapcs-linux
else
# Extra linkflags when building the shared version of the library
ifeq ($(CONFIG_AEABI),y)
KLIBCREQFLAGS += -mabi=aapcs-linux -mno-thumb-interwork
else
KLIBCREQFLAGS += -mabi=apcs-gnu -mno-thumb-interwork
endif
endif
# Normal binaries start at 64 kiB. A32 branch instructions have a
# range of ±32 MiB and T32 branch instructions only ±16 MiB, so we
# have to put klibc.so in that range. Putting it close above the
# executable can cause breakage, so instead swap them around:
# klibc.so at 2 MiB and executable at 4 MiB.
KLIBCLDFLAGS = $(LD_IMAGE_BASE_OPT) 0x400000
KLIBCSHAREDFLAGS = $(LD_IMAGE_BASE_OPT) 0x200000
# Kernel uses dedicated page or vDSO for signal return since 2.6.13
KLIBCEXECSTACK := n
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