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="$(ZBSSADDR)"
69 suffix_$(CONFIG_KERNEL_GZIP) = gzip
70 suffix_$(CONFIG_KERNEL_LZO) = lzo
71 suffix_$(CONFIG_KERNEL_LZMA) = lzma
72 suffix_$(CONFIG_KERNEL_XZ) = xzkern
73 suffix_$(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 += $(libfdt_objs) atags_to_fdt.o
92 targets := vmlinux vmlinux.lds \
93 piggy.$(suffix_y) piggy.$(suffix_y).o \
94 lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S bswapsdi2.o \
95 bswapsdi2.S font.o font.c head.o misc.o $(OBJS)
97 # Make sure files are removed during clean
98 extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \
99 lib1funcs.S ashldi3.S bswapsdi2.S $(libfdt) $(libfdt_hdrs) \
102 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
104 ifeq ($(CONFIG_FUNCTION_TRACER),y)
105 ORIG_CFLAGS := $(KBUILD_CFLAGS)
106 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
109 ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
110 asflags-y := -DZIMAGE
112 # Supply kernel BSS size to the decompressor via a linker symbol.
113 KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
114 awk 'END{print $$3}')
115 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
116 # Supply ZRELADDR to the decompressor via a linker symbol.
117 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
118 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
120 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
121 LDFLAGS_vmlinux += --be8
124 LDFLAGS_vmlinux += -p
125 # Report unresolved symbol references
126 LDFLAGS_vmlinux += --no-undefined
127 # Delete all temporary local symbols
128 LDFLAGS_vmlinux += -X
129 # Next argument is a linker script
130 LDFLAGS_vmlinux += -T
132 # For __aeabi_uidivmod
133 lib1funcs = $(obj)/lib1funcs.o
135 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
139 ashldi3 = $(obj)/ashldi3.o
141 $(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
144 # For __bswapsi2, __bswapdi2
145 bswapsdi2 = $(obj)/bswapsdi2.o
147 $(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S
150 # We need to prevent any GOTOFF relocs being used with references
151 # to symbols in the .bss section since we cannot relocate them
152 # independently from the rest at run time. This can be achieved by
153 # ensuring that no private .bss symbols exist, as global symbols
154 # always have a GOT entry which is what we need.
155 # The .data section is already discarded by the linker script so no need
156 # to bother about it here.
157 check_for_bad_syms = \
158 bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
159 [ -z "$$bad_syms" ] || \
160 ( echo "following symbols must have non local/private scope:" >&2; \
161 echo "$$bad_syms" >&2; rm -f $@; false )
163 check_for_multiple_zreladdr = \
164 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
165 echo 'multiple zreladdrs: $(ZRELADDR)'; \
166 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
170 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
171 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \
173 @$(check_for_multiple_zreladdr)
174 $(call if_changed,ld)
175 @$(check_for_bad_syms)
177 $(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
178 $(call if_changed,$(suffix_y))
180 $(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE
182 CFLAGS_font.o := -Dstatic=
184 $(obj)/font.c: $(FONTC)
187 $(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S