2 # linux/arch/arm/boot/compressed/Makefile
4 # create a compressed vmlinuz image from the original vmlinux
9 AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
11 OBJS += misc.o decompress.o
12 ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y)
15 FONTC = $(srctree)/lib/fonts/font_acorn_8x8.c
17 # string library code (-Os is enforced to keep it much smaller)
19 CFLAGS_string.o := -Os
21 ifeq ($(CONFIG_ARM_VIRT_EXT),y)
28 # Architecture dependencies
30 ifeq ($(CONFIG_ARCH_ACORN),y)
31 OBJS += ll_char_wr.o font.o
34 ifeq ($(CONFIG_ARCH_SA1100),y)
38 ifeq ($(CONFIG_CPU_XSCALE),y)
42 ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
43 OBJS += head-sharpsl.o
46 ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
47 ifeq ($(CONFIG_CPU_CP15),y)
50 # The endian should be set by h/w design.
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 := $(CONFIG_ZBOOT_ROM_BSS)
67 CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)"
69 compress-$(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
75 # Borrowed libfdt files for the ATAG compatibility mode
77 libfdt := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
78 libfdt_hdrs := fdt.h libfdt.h libfdt_internal.h
80 libfdt_objs := $(addsuffix .o, $(basename $(libfdt)))
82 $(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
85 $(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
86 $(addprefix $(obj)/,$(libfdt_hdrs))
88 ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
89 OBJS += $(libfdt_objs) atags_to_fdt.o
92 targets := vmlinux vmlinux.lds piggy_data piggy.o \
93 lib1funcs.o ashldi3.o bswapsdi2.o \
96 clean-files += piggy_data lib1funcs.S ashldi3.S bswapsdi2.S \
97 $(libfdt) $(libfdt_hdrs) hyp-stub.S
99 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
101 ifeq ($(CONFIG_FUNCTION_TRACER),y)
102 ORIG_CFLAGS := $(KBUILD_CFLAGS)
103 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
106 ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
107 asflags-y := -DZIMAGE
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 $$3}')
112 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
113 # Supply ZRELADDR to the decompressor via a linker symbol.
114 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
115 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
117 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
118 LDFLAGS_vmlinux += --be8
121 LDFLAGS_vmlinux += -p
122 # Report unresolved symbol references
123 LDFLAGS_vmlinux += --no-undefined
124 # Delete all temporary local symbols
125 LDFLAGS_vmlinux += -X
126 # Next argument is a linker script
127 LDFLAGS_vmlinux += -T
129 # For __aeabi_uidivmod
130 lib1funcs = $(obj)/lib1funcs.o
132 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
136 ashldi3 = $(obj)/ashldi3.o
138 $(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
141 # For __bswapsi2, __bswapdi2
142 bswapsdi2 = $(obj)/bswapsdi2.o
144 $(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S
147 # We need to prevent any GOTOFF relocs being used with references
148 # to symbols in the .bss section since we cannot relocate them
149 # independently from the rest at run time. This can be achieved by
150 # ensuring that no private .bss symbols exist, as global symbols
151 # always have a GOT entry which is what we need.
152 # The .data section is already discarded by the linker script so no need
153 # to bother about it here.
154 check_for_bad_syms = \
155 bad_syms=$$($(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 )
160 check_for_multiple_zreladdr = \
161 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
162 echo 'multiple zreladdrs: $(ZRELADDR)'; \
163 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
167 efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a
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)
176 $(obj)/piggy_data: $(obj)/../Image FORCE
177 $(call if_changed,$(compress-y))
179 $(obj)/piggy.o: $(obj)/piggy_data
181 CFLAGS_font.o := -Dstatic=
183 $(obj)/font.c: $(FONTC)
186 AFLAGS_hyp-stub.o := -Wa,-march=armv7-a
188 $(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S