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#
# arch/x86/realmode/Makefile
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
#
subdir- := wakeup
always := realmode.bin
realmode-y += header.o
realmode-$(CONFIG_X86_32) += reboot_32.o
realmode-y += trampoline_$(BITS).o
targets += $(realmode-y)
REALMODE_OBJS = $(addprefix $(obj)/,$(realmode-y))
sed-pasyms := -n -r -e 's/^([0-9a-fA-F]+) [ABCDGRSTVW] (.+)$$/pa_\2 = \2;/p'
quiet_cmd_pasyms = PASYMS $@
cmd_pasyms = $(NM) $(filter-out FORCE,$^) | \
sed $(sed-pasyms) | sort | uniq > $@
$(obj)/pasyms.h: $(REALMODE_OBJS) FORCE
$(call if_changed,pasyms)
$(obj)/realmode.lds: $(obj)/pasyms.h
LDFLAGS_realmode.elf := --emit-relocs -T
CPPFLAGS_realmode.lds += -P -C -I$(obj)
$(obj)/realmode.elf: $(obj)/realmode.lds $(REALMODE_OBJS) FORCE
$(call if_changed,ld)
OBJCOPYFLAGS_realmode.bin := -O binary
$(obj)/realmode.bin: $(obj)/realmode.elf
$(call if_changed,objcopy)
quiet_cmd_relocs = RELOCS $@
cmd_relocs = scripts/x86-relocs --realmode $< > $@
$(obj)/realmode.relocs: $(obj)/realmode.elf FORCE
$(call if_changed,relocs)
# ---------------------------------------------------------------------------
# How to compile the 16-bit code. Note we always compile for -march=i386,
# that way we can complain to the user if the CPU is insufficient.
KBUILD_CFLAGS := $(LINUXINCLUDE) -m32 -g -Os -D_SETUP -D__KERNEL__ \
-DDISABLE_BRANCH_PROFILING \
-Wall -Wstrict-prototypes \
-march=i386 -mregparm=3 \
-include $(srctree)/$(src)/../../boot/code16gcc.h \
-fno-strict-aliasing -fomit-frame-pointer \
$(call cc-option, -ffreestanding) \
$(call cc-option, -fno-toplevel-reorder,\
$(call cc-option, -fno-unit-at-a-time)) \
$(call cc-option, -fno-stack-protector) \
$(call cc-option, -mpreferred-stack-boundary=2)
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
GCOV_PROFILE := n
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