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 # -fstack-protector-strong triggers protection checks in this code,
107 # but it is being used too early to link to meaningful stack_chk logic.
108 nossp_flags
:= $(call cc-option
, -fno-stack-protector
)
109 CFLAGS_atags_to_fdt.o
:= $(nossp_flags
)
110 CFLAGS_fdt.o
:= $(nossp_flags
)
111 CFLAGS_fdt_ro.o
:= $(nossp_flags
)
112 CFLAGS_fdt_rw.o
:= $(nossp_flags
)
113 CFLAGS_fdt_wip.o
:= $(nossp_flags
)
115 ccflags-y
:= -fpic
-mno-single-pic-base
-fno-builtin
-I
$(obj
)
116 asflags-y
:= -DZIMAGE
118 # Supply kernel BSS size to the decompressor via a linker symbol.
119 KBSS_SZ
= $(shell $(CROSS_COMPILE
)size
$(obj
)/..
/..
/..
/..
/vmlinux | \
120 awk
'END{print $$3}')
121 LDFLAGS_vmlinux
= --defsym _kernel_bss_size
=$(KBSS_SZ
)
122 # Supply ZRELADDR to the decompressor via a linker symbol.
123 ifneq ($(CONFIG_AUTO_ZRELADDR
),y
)
124 LDFLAGS_vmlinux
+= --defsym zreladdr
=$(ZRELADDR
)
126 ifeq ($(CONFIG_CPU_ENDIAN_BE8
),y
)
127 LDFLAGS_vmlinux
+= --be8
130 LDFLAGS_vmlinux
+= -p
131 # Report unresolved symbol references
132 LDFLAGS_vmlinux
+= --no-undefined
133 # Delete all temporary local symbols
134 LDFLAGS_vmlinux
+= -X
135 # Next argument is a linker script
136 LDFLAGS_vmlinux
+= -T
138 # For __aeabi_uidivmod
139 lib1funcs
= $(obj
)/lib1funcs.o
141 $(obj
)/lib1funcs.S
: $(srctree
)/arch
/$(SRCARCH
)/lib
/lib1funcs.S
145 ashldi3
= $(obj
)/ashldi3.o
147 $(obj
)/ashldi3.S
: $(srctree
)/arch
/$(SRCARCH
)/lib
/ashldi3.S
150 # For __bswapsi2, __bswapdi2
151 bswapsdi2
= $(obj
)/bswapsdi2.o
153 $(obj
)/bswapsdi2.S
: $(srctree
)/arch
/$(SRCARCH
)/lib
/bswapsdi2.S
156 # We need to prevent any GOTOFF relocs being used with references
157 # to symbols in the .bss section since we cannot relocate them
158 # independently from the rest at run time. This can be achieved by
159 # ensuring that no private .bss symbols exist, as global symbols
160 # always have a GOT entry which is what we need.
161 # The .data section is already discarded by the linker script so no need
162 # to bother about it here.
163 check_for_bad_syms
= \
164 bad_syms
=$$($(CROSS_COMPILE
)nm
$@ | sed
-n
's/^.\{8\} [bc] \(.*\)/\1/p') && \
165 [ -z
"$$bad_syms" ] || \
166 ( echo
"following symbols must have non local/private scope:" >&2; \
167 echo
"$$bad_syms" >&2; rm -f
$@
; false
)
169 check_for_multiple_zreladdr
= \
170 if
[ $(words $(ZRELADDR
)) -gt
1 -a
"$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
171 echo
'multiple zreladdrs: $(ZRELADDR)'; \
172 echo
'This needs CONFIG_AUTO_ZRELADDR to be set'; \
176 efi-obj-
$(CONFIG_EFI_STUB
) := $(objtree
)/drivers
/firmware
/efi
/libstub
/lib.a
178 $(obj
)/vmlinux
: $(obj
)/vmlinux.lds
$(obj
)/$(HEAD
) $(obj
)/piggy.o \
179 $(addprefix $(obj
)/, $(OBJS
)) $(lib1funcs
) $(ashldi3
) \
180 $(bswapsdi2
) $(efi-obj-y
) FORCE
181 @
$(check_for_multiple_zreladdr
)
182 $(call if_changed
,ld)
183 @
$(check_for_bad_syms
)
185 $(obj
)/piggy_data
: $(obj
)/..
/Image FORCE
186 $(call if_changed
,$(compress-y
))
188 $(obj
)/piggy.o
: $(obj
)/piggy_data
190 CFLAGS_font.o
:= -Dstatic
=
192 $(obj
)/font.c
: $(FONTC
)
195 AFLAGS_hyp-stub.o
:= -Wa
,-march
=armv7-a
197 $(obj
)/hyp-stub.S
: $(srctree
)/arch
/$(SRCARCH
)/kernel
/hyp-stub.S