arch/arm/boot/compressed/Makefile

   1 #
   2 # linux/arch/arm/boot/compressed/Makefile
   3 #
   4 # create a compressed vmlinuz image from the original vmlinux
   5 #
   6
   7 OBJS            =
   8
   9 AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
  10 HEAD    = head.o
  11 OBJS    += misc.o decompress.o
  12 ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y)
  13 OBJS    += debug.o
  14 endif
  15 FONTC   = $(srctree)/lib/fonts/font_acorn_8x8.c
  16
  17 # string library code (-Os is enforced to keep it much smaller)
  18 OBJS            += string.o
  19 CFLAGS_string.o := -Os
  20
  21 ifeq ($(CONFIG_ARM_VIRT_EXT),y)
  22 OBJS            += hyp-stub.o
  23 endif
  24
  25 GCOV_PROFILE            := n
  26
  27 #
  28 # Architecture dependencies
  29 #
  30 ifeq ($(CONFIG_ARCH_ACORN),y)
  31 OBJS            += ll_char_wr.o font.o
  32 endif
  33
  34 ifeq ($(CONFIG_ARCH_SA1100),y)
  35 OBJS            += head-sa1100.o
  36 endif
  37
  38 ifeq ($(CONFIG_CPU_XSCALE),y)
  39 OBJS            += head-xscale.o
  40 endif
  41
  42 ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
  43 OBJS            += head-sharpsl.o
  44 endif
  45
  46 ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
  47 ifeq ($(CONFIG_CPU_CP15),y)
  48 OBJS            += big-endian.o
  49 else
  50 # The endian should be set by h/w design.
  51 endif
  52 endif
  53
  54 ifeq ($(CONFIG_ARCH_SHMOBILE_LEGACY),y)
  55 OBJS            += head-shmobile.o
  56 endif
  57
  58 #
  59 # We now have a PIC decompressor implementation.  Decompressors running
  60 # from RAM should not define ZTEXTADDR.  Decompressors running directly
  61 # from ROM or Flash must define ZTEXTADDR (preferably via the config)
  62 # FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
  63 ifeq ($(CONFIG_ZBOOT_ROM),y)
  64 ZTEXTADDR       := $(CONFIG_ZBOOT_ROM_TEXT)
  65 ZBSSADDR        := $(CONFIG_ZBOOT_ROM_BSS)
  66 else
  67 ZTEXTADDR       := 0
  68 ZBSSADDR        := ALIGN(8)
  69 endif
  70
  71 CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)"
  72
  73 suffix_$(CONFIG_KERNEL_GZIP) = gzip
  74 suffix_$(CONFIG_KERNEL_LZO)  = lzo
  75 suffix_$(CONFIG_KERNEL_LZMA) = lzma
  76 suffix_$(CONFIG_KERNEL_XZ)   = xzkern
  77 suffix_$(CONFIG_KERNEL_LZ4)  = lz4
  78
  79 # Borrowed libfdt files for the ATAG compatibility mode
  80
  81 libfdt          := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
  82 libfdt_hdrs     := fdt.h libfdt.h libfdt_internal.h
  83
  84 libfdt_objs     := $(addsuffix .o, $(basename $(libfdt)))
  85
  86 $(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
  87         $(call cmd,shipped)
  88
  89 $(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
  90         $(addprefix $(obj)/,$(libfdt_hdrs))
  91
  92 ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
  93 OBJS    += $(libfdt_objs) atags_to_fdt.o
  94 endif
  95
  96 targets       := vmlinux vmlinux.lds \
  97                  piggy.$(suffix_y) piggy.$(suffix_y).o \
  98                  lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S bswapsdi2.o \
  99                  bswapsdi2.S font.o font.c head.o misc.o $(OBJS)
 100
 101 # Make sure files are removed during clean
 102 extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \
 103                  lib1funcs.S ashldi3.S bswapsdi2.S $(libfdt) $(libfdt_hdrs) \
 104                  hyp-stub.S
 105
 106 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 107 ORIG_CFLAGS := $(KBUILD_CFLAGS)
 108 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
 109 endif
 110
 111 ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
 112 asflags-y := -DZIMAGE
 113
 114 # Supply kernel BSS size to the decompressor via a linker symbol.
 115 KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
 116                 awk 'END{print $$3}')
 117 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
 118 # Supply ZRELADDR to the decompressor via a linker symbol.
 119 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
 120 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
 121 endif
 122 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
 123 LDFLAGS_vmlinux += --be8
 124 endif
 125 # ?
 126 LDFLAGS_vmlinux += -p
 127 # Report unresolved symbol references
 128 LDFLAGS_vmlinux += --no-undefined
 129 # Delete all temporary local symbols
 130 LDFLAGS_vmlinux += -X
 131 # Next argument is a linker script
 132 LDFLAGS_vmlinux += -T
 133
 134 # For __aeabi_uidivmod
 135 lib1funcs = $(obj)/lib1funcs.o
 136
 137 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
 138         $(call cmd,shipped)
 139
 140 # For __aeabi_llsl
 141 ashldi3 = $(obj)/ashldi3.o
 142
 143 $(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
 144         $(call cmd,shipped)
 145
 146 # For __bswapsi2, __bswapdi2
 147 bswapsdi2 = $(obj)/bswapsdi2.o
 148
 149 $(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S
 150         $(call cmd,shipped)
 151
 152 # We need to prevent any GOTOFF relocs being used with references
 153 # to symbols in the .bss section since we cannot relocate them
 154 # independently from the rest at run time.  This can be achieved by
 155 # ensuring that no private .bss symbols exist, as global symbols
 156 # always have a GOT entry which is what we need.
 157 # The .data section is already discarded by the linker script so no need
 158 # to bother about it here.
 159 check_for_bad_syms = \
 160 bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
 161 [ -z "$$bad_syms" ] || \
 162   ( echo "following symbols must have non local/private scope:" >&2; \
 163     echo "$$bad_syms" >&2; rm -f $@; false )
 164
 165 check_for_multiple_zreladdr = \
 166 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
 167         echo 'multiple zreladdrs: $(ZRELADDR)'; \
 168         echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
 169         false; \
 170 fi
 171
 172 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
 173                 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \
 174                 $(bswapsdi2) FORCE
 175         @$(check_for_multiple_zreladdr)
 176         $(call if_changed,ld)
 177         @$(check_for_bad_syms)
 178
 179 $(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
 180         $(call if_changed,$(suffix_y))
 181
 182 $(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
 183
 184 CFLAGS_font.o := -Dstatic=
 185
 186 $(obj)/font.c: $(FONTC)
 187         $(call cmd,shipped)
 188
 189 $(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
 190         $(call cmd,shipped)