8b3b005d67
In checkin
5551a34e5aea x86-64, build: Always pass in -mno-sse
we unconditionally added -mno-sse to the main build, to keep newer
compilers from generating SSE instructions from autovectorization.
However, this did not extend to the special environments
(arch/x86/boot, arch/x86/boot/compressed, and arch/x86/realmode/rm).
Add -mno-sse to the compiler command line for these environments, and
add -mno-mmx to all the environments as well, as we don't want a
compiler to generate MMX code either.
This patch also removes a $(cc-option) call for -m32, since we have
long since stopped supporting compilers too old for the -m32 option,
and in fact hardcode it in other places in the Makefiles.
Reported-by: Kevin B. Smith <kevin.b.smith@intel.com>
Cc: Sunil K. Pandey <sunil.k.pandey@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: H. J. Lu <hjl.tools@gmail.com>
Link: http://lkml.kernel.org/n/tip-j21wzqv790q834n7yc6g80j1@git.kernel.org
Cc: <stable@vger.kernel.org> # build fix only
84 lines
2.6 KiB
Makefile
84 lines
2.6 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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always := realmode.bin realmode.relocs
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wakeup-objs := wakeup_asm.o wakemain.o video-mode.o
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wakeup-objs += copy.o bioscall.o regs.o
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# The link order of the video-*.o modules can matter. In particular,
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# video-vga.o *must* be listed first, followed by video-vesa.o.
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# Hardware-specific drivers should follow in the order they should be
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# probed, and video-bios.o should typically be last.
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wakeup-objs += video-vga.o
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wakeup-objs += video-vesa.o
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wakeup-objs += video-bios.o
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realmode-y += header.o
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realmode-y += trampoline_$(BITS).o
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realmode-y += stack.o
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realmode-y += reboot.o
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realmode-$(CONFIG_ACPI_SLEEP) += $(wakeup-objs)
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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 > $@
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targets += pasyms.h
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$(obj)/pasyms.h: $(REALMODE_OBJS) FORCE
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$(call if_changed,pasyms)
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targets += realmode.lds
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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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targets += realmode.elf
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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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targets += realmode.bin
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$(obj)/realmode.bin: $(obj)/realmode.elf $(obj)/realmode.relocs
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$(call if_changed,objcopy)
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quiet_cmd_relocs = RELOCS $@
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cmd_relocs = arch/x86/tools/relocs --realmode $< > $@
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targets += realmode.relocs
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$(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 := $(LINUXINCLUDE) -m32 -g -Os -D_SETUP -D__KERNEL__ -D_WAKEUP \
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-I$(srctree)/arch/x86/boot \
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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 -fno-pic \
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-mno-mmx -mno-sse \
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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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