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195 lines
5.5 KiB
195 lines
5.5 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# |
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# linux/arch/arm/boot/compressed/Makefile |
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# |
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# create a compressed vmlinuz image from the original vmlinux |
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# |
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OBJS = |
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HEAD = head.o |
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OBJS += misc.o decompress.o |
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ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) |
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OBJS += debug.o |
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AFLAGS_head.o += -DDEBUG |
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endif |
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FONTC = $(srctree)/lib/fonts/font_acorn_8x8.c |
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# string library code (-Os is enforced to keep it much smaller) |
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OBJS += string.o |
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CFLAGS_string.o := -Os |
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ifeq ($(CONFIG_ARM_VIRT_EXT),y) |
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OBJS += hyp-stub.o |
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endif |
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GCOV_PROFILE := n |
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KASAN_SANITIZE := n |
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# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. |
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KCOV_INSTRUMENT := n |
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# |
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# Architecture dependencies |
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# |
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ifeq ($(CONFIG_ARCH_ACORN),y) |
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OBJS += ll_char_wr.o font.o |
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endif |
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ifeq ($(CONFIG_ARCH_SA1100),y) |
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OBJS += head-sa1100.o |
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endif |
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ifeq ($(CONFIG_CPU_XSCALE),y) |
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OBJS += head-xscale.o |
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endif |
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ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) |
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OBJS += head-sharpsl.o |
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endif |
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ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) |
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ifeq ($(CONFIG_CPU_CP15),y) |
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OBJS += big-endian.o |
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else |
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# The endian should be set by h/w design. |
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endif |
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endif |
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# |
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# We now have a PIC decompressor implementation. Decompressors running |
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# from RAM should not define ZTEXTADDR. Decompressors running directly |
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# from ROM or Flash must define ZTEXTADDR (preferably via the config) |
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# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK |
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ifeq ($(CONFIG_ZBOOT_ROM),y) |
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ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) |
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ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) |
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else |
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ZTEXTADDR := 0 |
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ZBSSADDR := ALIGN(8) |
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endif |
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MALLOC_SIZE := 65536 |
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AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) -DMALLOC_SIZE=$(MALLOC_SIZE) |
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CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)" |
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CPPFLAGS_vmlinux.lds += -DTEXT_OFFSET="$(TEXT_OFFSET)" |
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CPPFLAGS_vmlinux.lds += -DMALLOC_SIZE="$(MALLOC_SIZE)" |
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compress-$(CONFIG_KERNEL_GZIP) = gzip |
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compress-$(CONFIG_KERNEL_LZO) = lzo |
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compress-$(CONFIG_KERNEL_LZMA) = lzma |
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compress-$(CONFIG_KERNEL_XZ) = xzkern |
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compress-$(CONFIG_KERNEL_LZ4) = lz4 |
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libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o |
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ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) |
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OBJS += $(libfdt_objs) atags_to_fdt.o |
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endif |
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ifeq ($(CONFIG_USE_OF),y) |
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OBJS += $(libfdt_objs) fdt_check_mem_start.o |
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endif |
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# -fstack-protector-strong triggers protection checks in this code, |
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# but it is being used too early to link to meaningful stack_chk logic. |
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$(foreach o, $(libfdt_objs) atags_to_fdt.o fdt_check_mem_start.o, \ |
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$(eval CFLAGS_$(o) := -I $(srctree)/scripts/dtc/libfdt -fno-stack-protector)) |
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targets := vmlinux vmlinux.lds piggy_data piggy.o \ |
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lib1funcs.o ashldi3.o bswapsdi2.o \ |
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head.o $(OBJS) |
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clean-files += lib1funcs.S ashldi3.S bswapsdi2.S hyp-stub.S |
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KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING |
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ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \ |
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-I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN) |
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ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg |
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asflags-y := -DZIMAGE |
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# Supply kernel BSS size to the decompressor via a linker symbol. |
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KBSS_SZ = $(shell echo $$(($$($(NM) $(obj)/../../../../vmlinux | \ |
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sed -n -e 's/^\([^ ]*\) [ABD] __bss_start$$/-0x\1/p' \ |
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-e 's/^\([^ ]*\) [ABD] __bss_stop$$/+0x\1/p') )) ) |
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LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) |
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# Supply ZRELADDR to the decompressor via a linker symbol. |
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ifneq ($(CONFIG_AUTO_ZRELADDR),y) |
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LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) |
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endif |
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ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) |
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LDFLAGS_vmlinux += --be8 |
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endif |
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# Report unresolved symbol references |
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LDFLAGS_vmlinux += --no-undefined |
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# Delete all temporary local symbols |
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LDFLAGS_vmlinux += -X |
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# Report orphan sections |
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ifdef CONFIG_LD_ORPHAN_WARN |
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LDFLAGS_vmlinux += --orphan-handling=warn |
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endif |
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# Next argument is a linker script |
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LDFLAGS_vmlinux += -T |
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# For __aeabi_uidivmod |
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lib1funcs = $(obj)/lib1funcs.o |
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$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S |
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$(call cmd,shipped) |
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# For __aeabi_llsl |
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ashldi3 = $(obj)/ashldi3.o |
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$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S |
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$(call cmd,shipped) |
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# For __bswapsi2, __bswapdi2 |
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bswapsdi2 = $(obj)/bswapsdi2.o |
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$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S |
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$(call cmd,shipped) |
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# We need to prevent any GOTOFF relocs being used with references |
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# to symbols in the .bss section since we cannot relocate them |
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# independently from the rest at run time. This can be achieved by |
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# ensuring that no private .bss symbols exist, as global symbols |
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# always have a GOT entry which is what we need. |
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# The .data section is already discarded by the linker script so no need |
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# to bother about it here. |
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check_for_bad_syms = \ |
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bad_syms=$$($(NM) $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ |
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[ -z "$$bad_syms" ] || \ |
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( echo "following symbols must have non local/private scope:" >&2; \ |
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echo "$$bad_syms" >&2; false ) |
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check_for_multiple_zreladdr = \ |
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if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ |
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echo 'multiple zreladdrs: $(ZRELADDR)'; \ |
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echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ |
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false; \ |
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fi |
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efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a |
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \ |
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$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \ |
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$(bswapsdi2) $(efi-obj-y) FORCE |
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@$(check_for_multiple_zreladdr) |
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$(call if_changed,ld) |
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@$(check_for_bad_syms) |
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$(obj)/piggy_data: $(obj)/../Image FORCE |
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$(call if_changed,$(compress-y)) |
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$(obj)/piggy.o: $(obj)/piggy_data |
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CFLAGS_font.o := -Dstatic= |
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$(obj)/font.c: $(FONTC) |
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$(call cmd,shipped) |
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AFLAGS_hyp-stub.o := -Wa,-march=armv7-a |
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$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S |
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$(call cmd,shipped)
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