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linux-yocto/arch/mips/boot/compressed/Makefile
Masahiro Yamada 7ce7e984ab kbuild: rename cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22} 
GZIP-compressed files end with 4 byte data that represents the size
of the original input. The decompressors (the self-extracting kernel)
exploit it to know the vmlinux size beforehand. To mimic the GZIP's
trailer, Kbuild provides cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}.
Unfortunately these macros are used everywhere despite the appended
size data is only useful for the decompressors.

There is no guarantee that such hand-crafted trailers are safely ignored.
In fact, the kernel refuses compressed initramdfs with the garbage data.
That is why usr/Makefile overrides size_append to make it no-op.

To limit the use of such broken compressed files, this commit renames
the existing macros as follows:

  cmd_bzip2   --> cmd_bzip2_with_size
  cmd_lzma    --> cmd_lzma_with_size
  cmd_lzo     --> cmd_lzo_with_size
  cmd_lz4     --> cmd_lz4_with_size
  cmd_xzkern  --> cmd_xzkern_with_size
  cmd_zstd22  --> cmd_zstd22_with_size

To keep the decompressors working, I updated the following Makefiles
accordingly:

  arch/arm/boot/compressed/Makefile
  arch/h8300/boot/compressed/Makefile
  arch/mips/boot/compressed/Makefile
  arch/parisc/boot/compressed/Makefile
  arch/s390/boot/compressed/Makefile
  arch/sh/boot/compressed/Makefile
  arch/x86/boot/compressed/Makefile

I reused the current macro names for the normal usecases; they produce
the compressed data in the proper format.

I did not touch the following:

  arch/arc/boot/Makefile
  arch/arm64/boot/Makefile
  arch/csky/boot/Makefile
  arch/mips/boot/Makefile
  arch/riscv/boot/Makefile
  arch/sh/boot/Makefile
  kernel/Makefile

This means those Makefiles will stop appending the size data.

I dropped the 'override size_append' hack from usr/Makefile.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
2022-01-14 02:54:05 +09:00

5.7 KiB
Raw Blame History

This file is subject to the terms and conditions of the GNU General Public

License.

Adapted for MIPS Pete Popov, Dan Malek

Copyright (C) 1994 by Linus Torvalds

Adapted for PowerPC by Gary Thomas

modified by Cort (cort@cs.nmt.edu)

Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University

Author: Wu Zhangjin wuzhangjin@gmail.com

include $(srctree)/arch/mips/Kbuild.platforms

set the default size of the mallocing area for decompressing

BOOT_HEAP_SIZE := 0x400000

Disable Function Tracer

KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE), $(KBUILD_CFLAGS))

KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))

Disable lq/sq in zboot

ifdef CONFIG_CPU_LOONGSON64 KBUILD_CFLAGS := $(filter-out -march=loongson3a, $(KBUILD_CFLAGS)) -march=mips64r2 endif

KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ -D__DISABLE_EXPORTS
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"

KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE)
-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)

Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.

KCOV_INSTRUMENT := n GCOV_PROFILE := n UBSAN_SANITIZE := n

decompressor objects (linked with vmlinuz)

vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o $(obj)/bswapsi.o

ifdef CONFIG_DEBUG_ZBOOT vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT) += $(obj)/dbg.o vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY) += $(obj)/uart-alchemy.o vmlinuzobjs-$(CONFIG_ATH79) += $(obj)/uart-ath79.o endif

vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o

vmlinuzobjs-$(CONFIG_KERNEL_ZSTD) += $(obj)/bswapdi.o $(obj)/ashldi3.o

targets := $(notdir $(vmlinuzobjs-y))

targets += vmlinux.bin

OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S

$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE $(call if_changed,objcopy)

tool_$(CONFIG_KERNEL_GZIP) = gzip tool_$(CONFIG_KERNEL_BZIP2) = bzip2_with_size tool_$(CONFIG_KERNEL_LZ4) = lz4_with_size tool_$(CONFIG_KERNEL_LZMA) = lzma_with_size tool_$(CONFIG_KERNEL_LZO) = lzo_with_size tool_$(CONFIG_KERNEL_XZ) = xzkern_with_size tool_$(CONFIG_KERNEL_ZSTD) = zstd22_with_size

targets += vmlinux.bin.z

$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE $(call if_changed,$(tool_y))

targets += piggy.o dummy.o

OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z
--set-section-flags=.image=contents,alloc,load,readonly,data

$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE $(call if_changed,objcopy)

HOSTCFLAGS_calc_vmlinuz_load_addr.o += $(LINUXINCLUDE)

Calculate the load address of the compressed kernel image

hostprogs := calc_vmlinuz_load_addr

ifneq ($(zload-y),) VMLINUZ_LOAD_ADDRESS := $(zload-y) else VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr
$(obj)/vmlinux.bin $(LINKER_LOAD_ADDRESS)) endif UIMAGE_LOADADDR = $(VMLINUZ_LOAD_ADDRESS)

vmlinuzobjs-y += $(obj)/piggy.o

targets += ../../../../vmlinuz

quiet_cmd_zld = LD $@ cmd_zld = $(LD) $(KBUILD_LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@ quiet_cmd_strip = STRIP $@ cmd_strip = $(STRIP) -s $@

$(objtree)/vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr $(call cmd,zld) $(call cmd,strip)

objboot := $(objtree)/arch/mips/boot

$(objboot)/vmlinuz: $(objtree)/vmlinuz FORCE

Some DECstations need all possible sections of an ECOFF executable

ifdef CONFIG_MACH_DECSTATION e2eflag := -a endif

elf2ecoff can only handle 32bit image

hostprogs += ../elf2ecoff

ifdef CONFIG_32BIT VMLINUZ = $(objtree)/vmlinuz else VMLINUZ = $(objboot)/vmlinuz.32 endif

targets += ../vmlinuz.32

quiet_cmd_32 = OBJCOPY $@ cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@

$(objboot)/vmlinuz.32: $(objtree)/vmlinuz $(call cmd,32)

targets += ../vmlinuz.ecoff

quiet_cmd_ecoff = ECOFF $@ cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag)

$(objboot)/vmlinuz.ecoff: $(objboot)/elf2ecoff $(VMLINUZ) $(call cmd,ecoff)

targets += ../vmlinuz.bin

OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary

$(objboot)/vmlinuz.bin: $(objtree)/vmlinuz $(call cmd,objcopy)

targets += ../vmlinuz.srec

OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec

$(objboot)/vmlinuz.srec: $(objtree)/vmlinuz $(call cmd,objcopy)

targets += ../uzImage.bin

$(objboot)/uzImage.bin: $(objboot)/vmlinuz.bin FORCE $(call if_changed,uimage,none)

Flattened Image Tree (.itb) image

ifeq ($(ADDR_BITS),32) itb_addr_cells = 1 endif ifeq ($(ADDR_BITS),64) itb_addr_cells = 2 endif

targets += ../vmlinuz.its.S

quiet_cmd_its_cat = CAT $@ cmd_its_cat = cat $(real-prereqs) >$@

$(objboot)/vmlinuz.its.S: $(addprefix $(srctree)/arch/mips/$(PLATFORM)/,$(ITS_INPUTS)) FORCE $(call if_changed,its_cat)

targets += ../vmlinuz.its

quiet_cmd_cpp_its_S = ITS $@ cmd_cpp_its_S = $(CPP) -P -C -o $@ $<
-DKERNEL_NAME=""Linux $(KERNELRELEASE)""
-DVMLINUX_BINARY=""$(2)""
-DVMLINUX_COMPRESSION=""none""
-DVMLINUX_LOAD_ADDRESS=$(VMLINUZ_LOAD_ADDRESS)
-DVMLINUX_ENTRY_ADDRESS=$(VMLINUZ_LOAD_ADDRESS)
-DADDR_BITS=$(ADDR_BITS)
-DADDR_CELLS=$(itb_addr_cells)

$(objboot)/vmlinuz.its: $(objboot)/vmlinuz.its.S FORCE $(call if_changed,cpp_its_S,vmlinuz.bin)

targets += ../vmlinuz.itb

quiet_cmd_itb-image = ITB $@ cmd_itb-image =
env PATH="$(objtree)/scripts/dtc:$(PATH)"
$(BASH) $(MKIMAGE)
-D "-I dts -O dtb -p 500
--include $(objtree)/arch/mips
--warning no-unit_address_vs_reg"
-f $(2) $@

$(objboot)/vmlinuz.itb: $(objboot)/vmlinuz.its $(objboot)/vmlinuz.bin FORCE $(call if_changed,itb-image,$<)