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 #
  55 # We now have a PIC decompressor implementation.  Decompressors running
  56 # from RAM should not define ZTEXTADDR.  Decompressors running directly
  57 # from ROM or Flash must define ZTEXTADDR (preferably via the config)
  58 # FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
  59 ifeq ($(CONFIG_ZBOOT_ROM),y)
  60 ZTEXTADDR       := $(CONFIG_ZBOOT_ROM_TEXT)
  61 ZBSSADDR        := $(CONFIG_ZBOOT_ROM_BSS)
  62 else
  63 ZTEXTADDR       := 0
  64 ZBSSADDR        := ALIGN(8)
  65 endif
  66
  67 CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)"
  68
  69 compress-$(CONFIG_KERNEL_GZIP) = gzip
  70 compress-$(CONFIG_KERNEL_LZO)  = lzo
  71 compress-$(CONFIG_KERNEL_LZMA) = lzma
  72 compress-$(CONFIG_KERNEL_XZ)   = xzkern
  73 compress-$(CONFIG_KERNEL_LZ4)  = lz4
  74
  75 # Borrowed libfdt files for the ATAG compatibility mode
  76
  77 libfdt          := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
  78 libfdt_hdrs     := fdt.h libfdt.h libfdt_internal.h
  79
  80 libfdt_objs     := $(addsuffix .o, $(basename $(libfdt)))
  81
  82 $(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
  83         $(call cmd,shipped)
  84
  85 $(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
  86         $(addprefix $(obj)/,$(libfdt_hdrs))
  87
  88 ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
  89 OBJS    += $(libfdt_objs) atags_to_fdt.o
  90 endif
  91
  92 targets       := vmlinux vmlinux.lds piggy_data piggy.o \
  93                  lib1funcs.o ashldi3.o bswapsdi2.o \
  94                  head.o $(OBJS)
  95
  96 clean-files += piggy_data lib1funcs.S ashldi3.S bswapsdi2.S \
  97                 $(libfdt) $(libfdt_hdrs) hyp-stub.S
  98
  99 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 100
 101 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 102 ORIG_CFLAGS := $(KBUILD_CFLAGS)
 103 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
 104 endif
 105
 106 ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
 107 asflags-y := -DZIMAGE
 108
 109 # Supply kernel BSS size to the decompressor via a linker symbol.
 110 KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
 111                 awk 'END{print $$3}')
 112 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
 113 # Supply ZRELADDR to the decompressor via a linker symbol.
 114 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
 115 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
 116 endif
 117 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
 118 LDFLAGS_vmlinux += --be8
 119 endif
 120 # ?
 121 LDFLAGS_vmlinux += -p
 122 # Report unresolved symbol references
 123 LDFLAGS_vmlinux += --no-undefined
 124 # Delete all temporary local symbols
 125 LDFLAGS_vmlinux += -X
 126 # Next argument is a linker script
 127 LDFLAGS_vmlinux += -T
 128
 129 # For __aeabi_uidivmod
 130 lib1funcs = $(obj)/lib1funcs.o
 131
 132 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
 133         $(call cmd,shipped)
 134
 135 # For __aeabi_llsl
 136 ashldi3 = $(obj)/ashldi3.o
 137
 138 $(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
 139         $(call cmd,shipped)
 140
 141 # For __bswapsi2, __bswapdi2
 142 bswapsdi2 = $(obj)/bswapsdi2.o
 143
 144 $(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S
 145         $(call cmd,shipped)
 146
 147 # We need to prevent any GOTOFF relocs being used with references
 148 # to symbols in the .bss section since we cannot relocate them
 149 # independently from the rest at run time.  This can be achieved by
 150 # ensuring that no private .bss symbols exist, as global symbols
 151 # always have a GOT entry which is what we need.
 152 # The .data section is already discarded by the linker script so no need
 153 # to bother about it here.
 154 check_for_bad_syms = \
 155 bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
 156 [ -z "$$bad_syms" ] || \
 157   ( echo "following symbols must have non local/private scope:" >&2; \
 158     echo "$$bad_syms" >&2; rm -f $@; false )
 159
 160 check_for_multiple_zreladdr = \
 161 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
 162         echo 'multiple zreladdrs: $(ZRELADDR)'; \
 163         echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
 164         false; \
 165 fi
 166
 167 efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a
 168
 169 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
 170                 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \
 171                 $(bswapsdi2) $(efi-obj-y) FORCE
 172         @$(check_for_multiple_zreladdr)
 173         $(call if_changed,ld)
 174         @$(check_for_bad_syms)
 175
 176 $(obj)/piggy_data: $(obj)/../Image FORCE
 177         $(call if_changed,$(compress-y))
 178
 179 $(obj)/piggy.o: $(obj)/piggy_data
 180
 181 CFLAGS_font.o := -Dstatic=
 182
 183 $(obj)/font.c: $(FONTC)
 184         $(call cmd,shipped)
 185
 186 AFLAGS_hyp-stub.o := -Wa,-march=armv7-a
 187
 188 $(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
 189         $(call cmd,shipped)