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