arch/x86/realmode/rm/Makefile

   1 #
   2 # arch/x86/realmode/Makefile
   3 #
   4 # This file is subject to the terms and conditions of the GNU General Public
   5 # License.  See the file "COPYING" in the main directory of this archive
   6 # for more details.
   7 #
   8 #
   9
  10 subdir- := wakeup
  11
  12 always := realmode.bin
  13
  14 realmode-y                      += header.o
  15
  16 targets += $(realmode-y)
  17
  18 REALMODE_OBJS = $(addprefix $(obj)/,$(realmode-y))
  19
  20 sed-pasyms := -n -r -e 's/^([0-9a-fA-F]+) [ABCDGRSTVW] (.+)$$/pa_\2 = \2;/p'
  21
  22 quiet_cmd_pasyms = PASYMS  $@
  23       cmd_pasyms = $(NM) $(filter-out FORCE,$^) | \
  24                    sed $(sed-pasyms) | sort | uniq > $@
  25
  26 $(obj)/pasyms.h: $(REALMODE_OBJS) FORCE
  27         $(call if_changed,pasyms)
  28
  29 $(obj)/realmode.lds: $(obj)/pasyms.h
  30
  31 LDFLAGS_realmode.elf := --emit-relocs -T
  32 CPPFLAGS_realmode.lds += -P -C -I$(obj)
  33
  34 $(obj)/realmode.elf: $(obj)/realmode.lds $(REALMODE_OBJS) FORCE
  35         $(call if_changed,ld)
  36
  37 OBJCOPYFLAGS_realmode.bin := -O binary
  38
  39 $(obj)/realmode.bin: $(obj)/realmode.elf
  40         $(call if_changed,objcopy)
  41
  42 quiet_cmd_relocs = RELOCS  $@
  43       cmd_relocs = scripts/x86-relocs --realmode $< > $@
  44 $(obj)/realmode.relocs: $(obj)/realmode.elf FORCE
  45         $(call if_changed,relocs)
  46
  47 # ---------------------------------------------------------------------------
  48
  49 # How to compile the 16-bit code.  Note we always compile for -march=i386,
  50 # that way we can complain to the user if the CPU is insufficient.
  51 KBUILD_CFLAGS   := $(LINUXINCLUDE) -m32 -g -Os -D_SETUP -D__KERNEL__ \
  52                    -DDISABLE_BRANCH_PROFILING \
  53                    -Wall -Wstrict-prototypes \
  54                    -march=i386 -mregparm=3 \
  55                    -include $(srctree)/$(src)/../../boot/code16gcc.h \
  56                    -fno-strict-aliasing -fomit-frame-pointer \
  57                    $(call cc-option, -ffreestanding) \
  58                    $(call cc-option, -fno-toplevel-reorder,\
  59                         $(call cc-option, -fno-unit-at-a-time)) \
  60                    $(call cc-option, -fno-stack-protector) \
  61                    $(call cc-option, -mpreferred-stack-boundary=2)
  62 KBUILD_AFLAGS   := $(KBUILD_CFLAGS) -D__ASSEMBLY__
  63 GCOV_PROFILE := n