Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
8OBJS =
9
10HEAD = head.o
11OBJS += misc.o decompress.o
12ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y)
13OBJS += debug.o
14AFLAGS_head.o += -DDEBUG
15endif
16
17# string library code (-Os is enforced to keep it much smaller)
18OBJS += string.o
19CFLAGS_string.o := -Os
20
21ifeq ($(CONFIG_ARM_VIRT_EXT),y)
22OBJS += hyp-stub.o
23endif
24
25GCOV_PROFILE := n
26KASAN_SANITIZE := n
27
28# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
29KCOV_INSTRUMENT := n
30UBSAN_SANITIZE := n
31
32#
33# Architecture dependencies
34#
35ifeq ($(CONFIG_ARCH_ACORN),y)
36OBJS += ll_char_wr.o font.o
37endif
38
39ifeq ($(CONFIG_ARCH_SA1100),y)
40OBJS += head-sa1100.o
41endif
42
43ifeq ($(CONFIG_CPU_XSCALE),y)
44OBJS += head-xscale.o
45endif
46
47ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
48OBJS += head-sharpsl.o
49endif
50
51ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
52ifeq ($(CONFIG_CPU_CP15),y)
53OBJS += big-endian.o
54else
55# The endian should be set by h/w design.
56endif
57endif
58
59#
60# We now have a PIC decompressor implementation. Decompressors running
61# from RAM should not define ZTEXTADDR. Decompressors running directly
62# from ROM or Flash must define ZTEXTADDR (preferably via the config)
63# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
64ifeq ($(CONFIG_ZBOOT_ROM),y)
65ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT)
66ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS)
67else
68ZTEXTADDR := 0
69ZBSSADDR := ALIGN(8)
70endif
71
72MALLOC_SIZE := 65536
73
74AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) -DMALLOC_SIZE=$(MALLOC_SIZE)
75CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)"
76CPPFLAGS_vmlinux.lds += -DTEXT_OFFSET="$(TEXT_OFFSET)"
77CPPFLAGS_vmlinux.lds += -DMALLOC_SIZE="$(MALLOC_SIZE)"
78
79compress-$(CONFIG_KERNEL_GZIP) = gzip
80compress-$(CONFIG_KERNEL_LZO) = lzo_with_size
81compress-$(CONFIG_KERNEL_LZMA) = lzma_with_size
82compress-$(CONFIG_KERNEL_XZ) = xzkern_with_size
83compress-$(CONFIG_KERNEL_LZ4) = lz4_with_size
84
85libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o
86
87ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
88CFLAGS_REMOVE_atags_to_fdt.o += -Wframe-larger-than=${CONFIG_FRAME_WARN}
89CFLAGS_atags_to_fdt.o += -Wframe-larger-than=1280
90OBJS += $(libfdt_objs) atags_to_fdt.o
91endif
92ifeq ($(CONFIG_USE_OF),y)
93OBJS += $(libfdt_objs) fdt_check_mem_start.o
94endif
95
96OBJS += lib1funcs.o ashldi3.o bswapsdi2.o
97
98targets := vmlinux vmlinux.lds piggy_data piggy.o \
99 head.o $(OBJS)
100
101KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
102
103ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \
104 -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
105 -I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN)
106ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg
107asflags-y := -DZIMAGE
108
109# Supply kernel BSS size to the decompressor via a linker symbol.
110KBSS_SZ = $(shell echo $$(($$($(NM) vmlinux | \
111 sed -n -e 's/^\([^ ]*\) [ABD] __bss_start$$/-0x\1/p' \
112 -e 's/^\([^ ]*\) [ABD] __bss_stop$$/+0x\1/p') )) )
113LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
114# Supply ZRELADDR to the decompressor via a linker symbol.
115ifneq ($(CONFIG_AUTO_ZRELADDR),y)
116LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
117endif
118ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
119LDFLAGS_vmlinux += --be8
120endif
121# Report unresolved symbol references
122LDFLAGS_vmlinux += --no-undefined
123# Delete all temporary local symbols
124LDFLAGS_vmlinux += -X
125# Report orphan sections
126ifdef CONFIG_LD_ORPHAN_WARN
127LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
128endif
129# Next argument is a linker script
130LDFLAGS_vmlinux += -T
131
132# We need to prevent any GOTOFF relocs being used with references
133# to symbols in the .bss section since we cannot relocate them
134# independently from the rest at run time. This can be achieved by
135# ensuring that no private .bss symbols exist, as global symbols
136# always have a GOT entry which is what we need.
137# The .data section is already discarded by the linker script so no need
138# to bother about it here.
139check_for_bad_syms = \
140bad_syms=$$($(NM) $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
141[ -z "$$bad_syms" ] || \
142 ( echo "following symbols must have non local/private scope:" >&2; \
143 echo "$$bad_syms" >&2; false )
144
145check_for_multiple_zreladdr = \
146if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
147 echo 'multiple zreladdrs: $(ZRELADDR)'; \
148 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
149 false; \
150fi
151
152efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a
153
154$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
155 $(addprefix $(obj)/, $(OBJS)) \
156 $(efi-obj-y) FORCE
157 @$(check_for_multiple_zreladdr)
158 $(call if_changed,ld)
159 @$(check_for_bad_syms)
160
161$(obj)/piggy_data: $(obj)/../Image FORCE
162 $(call if_changed,$(compress-y))
163
164$(obj)/piggy.o: $(obj)/piggy_data
165
166CFLAGS_font.o := -Dstatic=