# SPDX-License-Identifier: GPL-2.0
#
# linux/arch/arm/boot/compressed/Makefile
#
# create a compressed vmlinuz image from the original vmlinux
#
OBJS =
AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
HEAD = head.o
OBJS += misc.o decompress.o
ifeq ($([31mCONFIG_DEBUG_UNCOMPRESS[0m),y)
OBJS += debug.o
endif
FONTC = $(srctree)/lib/fonts/font_acorn_8x8.c
# string library code (-Os is enforced to keep it much smaller)
OBJS += string.o
CFLAGS_string.o := -Os
ifeq ($([31mCONFIG_ARM_VIRT_EXT[0m),y)
OBJS += hyp-stub.o
endif
GCOV_PROFILE := n
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
#
# Architecture dependencies
#
ifeq ($([31mCONFIG_ARCH_ACORN[0m),y)
OBJS += ll_char_wr.o font.o
endif
ifeq ($([31mCONFIG_ARCH_SA1100[0m),y)
OBJS += head-sa1100.o
endif
ifeq ($([31mCONFIG_CPU_XSCALE[0m),y)
OBJS += head-xscale.o
endif
ifeq ($([31mCONFIG_PXA_SHARPSL_DETECT_MACH_ID[0m),y)
OBJS += head-sharpsl.o
endif
ifeq ($([31mCONFIG_CPU_ENDIAN_BE32[0m),y)
ifeq ($([31mCONFIG_CPU_CP15[0m),y)
OBJS += big-endian.o
else
# The endian should be set by h/w design.
endif
endif
#
# We now have a PIC decompressor implementation. Decompressors running
# from RAM should not define ZTEXTADDR. Decompressors running directly
# from ROM or Flash must define ZTEXTADDR (preferably via the config)
# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
ifeq ($([31mCONFIG_ZBOOT_ROM[0m),y)
ZTEXTADDR := $([31mCONFIG_ZBOOT_ROM_TEXT[0m)
ZBSSADDR := $([31mCONFIG_ZBOOT_ROM_BSS[0m)
else
ZTEXTADDR := 0
ZBSSADDR := ALIGN(8)
endif
CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)"
compress-$([31mCONFIG_KERNEL_GZIP[0m) = gzip
compress-$([31mCONFIG_KERNEL_LZO[0m) = lzo
compress-$([31mCONFIG_KERNEL_LZMA[0m) = lzma
compress-$([31mCONFIG_KERNEL_XZ[0m) = xzkern
compress-$([31mCONFIG_KERNEL_LZ4[0m) = lz4
# Borrowed libfdt files for the ATAG compatibility mode
libfdt := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
libfdt_hdrs := fdt.h libfdt.h libfdt_internal.h
libfdt_objs := $(addsuffix .o, $(basename $(libfdt)))
$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
$(call cmd,shipped)
$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
$(addprefix $(obj)/,$(libfdt_hdrs))
ifeq ($([31mCONFIG_ARM_ATAG_DTB_COMPAT[0m),y)
OBJS += $(libfdt_objs) atags_to_fdt.o
endif
targets := vmlinux vmlinux.lds piggy_data piggy.o \
lib1funcs.o ashldi3.o bswapsdi2.o \
head.o $(OBJS)
clean-files += piggy_data lib1funcs.S ashldi3.S bswapsdi2.S \
$(libfdt) $(libfdt_hdrs) hyp-stub.S
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
KBUILD_CFLAGS += $(DISABLE_ARM_SSP_PER_TASK_PLUGIN)
ifeq ($([31mCONFIG_FUNCTION_TRACER[0m),y)
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif
# -fstack-protector-strong triggers protection checks in this code,
# but it is being used too early to link to meaningful stack_chk logic.
nossp_flags := $(call cc-option, -fno-stack-protector)
CFLAGS_atags_to_fdt.o := $(nossp_flags)
CFLAGS_fdt.o := $(nossp_flags)
CFLAGS_fdt_ro.o := $(nossp_flags)
CFLAGS_fdt_rw.o := $(nossp_flags)
CFLAGS_fdt_wip.o := $(nossp_flags)
ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin -I$(obj)
asflags-y := -DZIMAGE
# Supply kernel BSS size to the decompressor via a linker symbol.
KBSS_SZ = $(shell echo $$(($$($(CROSS_COMPILE)nm $(obj)/../../../../vmlinux | \
sed -n -e 's/^\([^ ]*\) [AB] __bss_start$$/-0x\1/p' \
-e 's/^\([^ ]*\) [AB] __bss_stop$$/+0x\1/p') )) )
LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
# Supply ZRELADDR to the decompressor via a linker symbol.
ifneq ($([31mCONFIG_AUTO_ZRELADDR[0m),y)
LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
endif
ifeq ($([31mCONFIG_CPU_ENDIAN_BE8[0m),y)
LDFLAGS_vmlinux += --be8
endif
# Report unresolved symbol references
LDFLAGS_vmlinux += --no-undefined
# Delete all temporary local symbols
LDFLAGS_vmlinux += -X
# Next argument is a linker script
LDFLAGS_vmlinux += -T
# For __aeabi_uidivmod
lib1funcs = $(obj)/lib1funcs.o
$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
$(call cmd,shipped)
# For __aeabi_llsl
ashldi3 = $(obj)/ashldi3.o
$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
$(call cmd,shipped)
# For __bswapsi2, __bswapdi2
bswapsdi2 = $(obj)/bswapsdi2.o
$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S
$(call cmd,shipped)
# We need to prevent any GOTOFF relocs being used with references
# to symbols in the .bss section since we cannot relocate them
# independently from the rest at run time. This can be achieved by
# ensuring that no private .bss symbols exist, as global symbols
# always have a GOT entry which is what we need.
# The .data section is already discarded by the linker script so no need
# to bother about it here.
check_for_bad_syms = \
bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
[ -z "$$bad_syms" ] || \
( echo "following symbols must have non local/private scope:" >&2; \
echo "$$bad_syms" >&2; false )
check_for_multiple_zreladdr = \
if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
echo 'multiple zreladdrs: $(ZRELADDR)'; \
echo 'This needs [31mCONFIG_AUTO_ZRELADDR[0m to be set'; \
false; \
fi
efi-obj-$([31mCONFIG_EFI_STUB[0m) := $(objtree)/drivers/firmware/efi/libstub/lib.a
$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \
$(bswapsdi2) $(efi-obj-y) FORCE
@$(check_for_multiple_zreladdr)
$(call if_changed,ld)
@$(check_for_bad_syms)
$(obj)/piggy_data: $(obj)/../Image FORCE
$(call if_changed,$(compress-y))
$(obj)/piggy.o: $(obj)/piggy_data
CFLAGS_font.o := -Dstatic=
$(obj)/font.c: $(FONTC)
$(call cmd,shipped)
AFLAGS_hyp-stub.o := -Wa,-march=armv7-a
$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
$(call cmd,shipped)