1 # SPDX-License-Identifier: GPL-2.0
2 #
3 # linux/arch/arm/boot/compressed/Makefile
4 #
5 # create a compressed vmlinuz image from the original vmlinux
6 #
7
8 OBJS =
9
10 HEAD = head.o
11 OBJS += misc.o decompress.o
12 CFLAGS_decompress.o += $(DISABLE_STACKLEAK_PLUGIN)
13 ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y)
14 OBJS += debug.o
15 AFLAGS_head.o += -DDEBUG
16 endif
17
18 # string library code (-Os is enforced to keep it much smaller)
19 OBJS += string.o
20 CFLAGS_string.o := -Os
21
22 ifeq ($(CONFIG_ARM_VIRT_EXT),y)
23 OBJS += hyp-stub.o
24 endif
25
26 #
27 # Architecture dependencies
28 #
29 ifeq ($(CONFIG_ARCH_ACORN),y)
30 OBJS += ll_char_wr.o font.o
31 endif
32
33 ifeq ($(CONFIG_ARCH_SA1100),y)
34 OBJS += head-sa1100.o
35 endif
36
37 ifeq ($(CONFIG_CPU_XSCALE),y)
38 OBJS += head-xscale.o
39 endif
40
41 ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
42 OBJS += head-sharpsl.o
43 endif
44
45 ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
46 ifeq ($(CONFIG_CPU_CP15),y)
47 OBJS += big-endian.o
48 else
49 # The endian should be set by h/w design.
50 endif
51 endif
52
53 #
54 # We now have a PIC decompressor implementation. Decompressors running
55 # from RAM should not define ZTEXTADDR. Decompressors running directly
56 # from ROM or Flash must define ZTEXTADDR (preferably via the config)
57 # FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
58 ifeq ($(CONFIG_ZBOOT_ROM),y)
59 ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT)
60 ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS)
61 else
62 ZTEXTADDR := 0
63 ZBSSADDR := ALIGN(8)
64 endif
65
66 MALLOC_SIZE := 65536
67
68 AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) -DMALLOC_SIZE=$(MALLOC_SIZE)
69 CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)"
70 CPPFLAGS_vmlinux.lds += -DTEXT_OFFSET="$(TEXT_OFFSET)"
71 CPPFLAGS_vmlinux.lds += -DMALLOC_SIZE="$(MALLOC_SIZE)"
72
73 compress-$(CONFIG_KERNEL_GZIP) = gzip
74 compress-$(CONFIG_KERNEL_LZO) = lzo_with_size
75 compress-$(CONFIG_KERNEL_LZMA) = lzma_with_size
76 compress-$(CONFIG_KERNEL_XZ) = xzkern_with_size
77 compress-$(CONFIG_KERNEL_LZ4) = lz4_with_size
78
79 libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o
80
81 ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
82 CFLAGS_REMOVE_atags_to_fdt.o += -Wframe-larger-than=${CONFIG_FRAME_WARN}
83 CFLAGS_atags_to_fdt.o += -Wframe-larger-than=1280
84 OBJS += $(libfdt_objs) atags_to_fdt.o
85 endif
86 ifeq ($(CONFIG_USE_OF),y)
87 OBJS += $(libfdt_objs) fdt_check_mem_start.o
88 endif
89
90 OBJS += lib1funcs.o ashldi3.o bswapsdi2.o
91
92 targets := vmlinux vmlinux.lds piggy_data piggy.o \
93 head.o $(OBJS)
94
95 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
96
97 ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \
98 -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
99 -I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN)
100 ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg
101 asflags-y := -DZIMAGE
102
103 # Supply kernel BSS size to the decompressor via a linker symbol.
104 KBSS_SZ = $(shell echo $$(($$($(NM) vmlinux | \
105 sed -n -e 's/^\([^ ]*\) [ABD] __bss_start$$/-0x\1/p' \
106 -e 's/^\([^ ]*\) [ABD] __bss_stop$$/+0x\1/p') )) )
107 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
108 # Supply ZRELADDR to the decompressor via a linker symbol.
109 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
110 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
111 endif
112 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
113 LDFLAGS_vmlinux += --be8
114 endif
115 # Report unresolved symbol references
116 LDFLAGS_vmlinux += --no-undefined
117 # Delete all temporary local symbols
118 LDFLAGS_vmlinux += -X
119 # Report orphan sections
120 ifdef CONFIG_LD_ORPHAN_WARN
121 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
122 endif
123 # Next argument is a linker script
124 LDFLAGS_vmlinux += -T
125
126 # We need to prevent any GOTOFF relocs being used with references
127 # to symbols in the .bss section since we cannot relocate them
128 # independently from the rest at run time. This can be achieved by
129 # ensuring that no private .bss symbols exist, as global symbols
130 # always have a GOT entry which is what we need.
131 # The .data section is already discarded by the linker script so no need
132 # to bother about it here.
133 check_for_bad_syms = \
134 bad_syms=$$($(NM) $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
135 [ -z "$$bad_syms" ] || \
136 ( echo "following symbols must have non local/private scope:" >&2; \
137 echo "$$bad_syms" >&2; false )
138
139 check_for_multiple_zreladdr = \
140 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
141 echo 'multiple zreladdrs: $(ZRELADDR)'; \
142 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
143 false; \
144 fi
145
146 efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a
147
148 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
149 $(addprefix $(obj)/, $(OBJS)) \
150 $(efi-obj-y) FORCE
151 @$(check_for_multiple_zreladdr)
152 $(call if_changed,ld)
153 @$(check_for_bad_syms)
154
155 $(obj)/piggy_data: $(obj)/../Image FORCE
156 $(call if_changed,$(compress-y))
157
158 $(obj)/piggy.o: $(obj)/piggy_data
159
160 CFLAGS_font.o := -Dstatic=
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