xref: /linux/arch/arm/boot/compressed/Makefile (revision 12871a0bd67dd4db4418e1daafcd46e9d329ef10) 
1#
2# linux/arch/arm/boot/compressed/Makefile
3#
4# create a compressed vmlinuz image from the original vmlinux
5#
6
7OBJS		=
8
9# Ensure that mmcif loader code appears early in the image
10# to minimise that number of bocks that have to be read in
11# order to load it.
12ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y)
13ifeq ($(CONFIG_ARCH_SH7372),y)
14OBJS		+= mmcif-sh7372.o
15endif
16endif
17
18AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
19HEAD	= head.o
20OBJS	+= misc.o decompress.o
21FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
22
23#
24# Architecture dependencies
25#
26ifeq ($(CONFIG_ARCH_ACORN),y)
27OBJS		+= ll_char_wr.o font.o
28endif
29
30ifeq ($(CONFIG_ARCH_SHARK),y)
31OBJS		+= head-shark.o ofw-shark.o
32endif
33
34ifeq ($(CONFIG_ARCH_P720T),y)
35# Borrow this code from SA1100
36OBJS		+= head-sa1100.o
37endif
38
39ifeq ($(CONFIG_ARCH_SA1100),y)
40OBJS		+= head-sa1100.o
41endif
42
43ifeq ($(CONFIG_ARCH_VT8500),y)
44OBJS		+= head-vt8500.o
45endif
46
47ifeq ($(CONFIG_CPU_XSCALE),y)
48OBJS		+= head-xscale.o
49endif
50
51ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
52OBJS		+= head-sharpsl.o
53endif
54
55ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
56ifeq ($(CONFIG_CPU_CP15),y)
57OBJS		+= big-endian.o
58else
59# The endian should be set by h/w design.
60endif
61endif
62
63ifeq ($(CONFIG_ARCH_SHMOBILE),y)
64OBJS		+= head-shmobile.o
65endif
66
67#
68# We now have a PIC decompressor implementation.  Decompressors running
69# from RAM should not define ZTEXTADDR.  Decompressors running directly
70# from ROM or Flash must define ZTEXTADDR (preferably via the config)
71# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
72ifeq ($(CONFIG_ZBOOT_ROM),y)
73ZTEXTADDR	:= $(CONFIG_ZBOOT_ROM_TEXT)
74ZBSSADDR	:= $(CONFIG_ZBOOT_ROM_BSS)
75else
76ZTEXTADDR	:= 0
77ZBSSADDR	:= ALIGN(8)
78endif
79
80SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
81
82suffix_$(CONFIG_KERNEL_GZIP) = gzip
83suffix_$(CONFIG_KERNEL_LZO)  = lzo
84suffix_$(CONFIG_KERNEL_LZMA) = lzma
85
86targets       := vmlinux vmlinux.lds \
87		 piggy.$(suffix_y) piggy.$(suffix_y).o \
88		 font.o font.c head.o misc.o $(OBJS)
89
90# Make sure files are removed during clean
91extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S
92
93ifeq ($(CONFIG_FUNCTION_TRACER),y)
94ORIG_CFLAGS := $(KBUILD_CFLAGS)
95KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
96endif
97
98ccflags-y := -fpic -fno-builtin
99asflags-y := -Wa,-march=all
100
101# Supply ZRELADDR to the decompressor via a linker symbol.
102ifneq ($(CONFIG_AUTO_ZRELADDR),y)
103LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
104endif
105ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
106LDFLAGS_vmlinux += --be8
107endif
108# ?
109LDFLAGS_vmlinux += -p
110# Report unresolved symbol references
111LDFLAGS_vmlinux += --no-undefined
112# Delete all temporary local symbols
113LDFLAGS_vmlinux += -X
114# Next argument is a linker script
115LDFLAGS_vmlinux += -T
116
117# For __aeabi_uidivmod
118lib1funcs = $(obj)/lib1funcs.o
119
120$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
121	$(call cmd,shipped)
122
123# We need to prevent any GOTOFF relocs being used with references
124# to symbols in the .bss section since we cannot relocate them
125# independently from the rest at run time.  This can be achieved by
126# ensuring that no private .bss symbols exist, as global symbols
127# always have a GOT entry which is what we need.
128# The .data section is already discarded by the linker script so no need
129# to bother about it here.
130check_for_bad_syms = \
131bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
132[ -z "$$bad_syms" ] || \
133  ( echo "following symbols must have non local/private scope:" >&2; \
134    echo "$$bad_syms" >&2; rm -f $@; false )
135
136$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
137	 	$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
138	$(call if_changed,ld)
139	@$(check_for_bad_syms)
140
141$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
142	$(call if_changed,$(suffix_y))
143
144$(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
145
146CFLAGS_font.o := -Dstatic=
147
148$(obj)/font.c: $(FONTC)
149	$(call cmd,shipped)
150
151$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
152	@sed "$(SEDFLAGS)" < $< > $@
153