From 129ab0d2d9f38b9d43df35235fc66c6740d6928b Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Tue, 14 Dec 2021 11:53:53 +0900 Subject: kbuild: do not quote string values in include/config/auto.conf The previous commit fixed up all shell scripts to not include include/config/auto.conf. Now that include/config/auto.conf is only included by Makefiles, we can change it into a more Make-friendly form. Previously, Kconfig output string values enclosed with double-quotes (both in the .config and include/config/auto.conf): CONFIG_X="foo bar" Unlike shell, Make handles double-quotes (and single-quotes as well) verbatim. We must rip them off when used. There are some patterns: [1] $(patsubst "%",%,$(CONFIG_X)) [2] $(CONFIG_X:"%"=%) [3] $(subst ",,$(CONFIG_X)) [4] $(shell echo $(CONFIG_X)) These are not only ugly, but also fragile. [1] and [2] do not work if the value contains spaces, like CONFIG_X=" foo bar " [3] does not work correctly if the value contains double-quotes like CONFIG_X="foo\"bar" [4] seems to work better, but has a cost of forking a process. Anyway, quoted strings were always PITA for our Makefiles. This commit changes Kconfig to stop quoting in include/config/auto.conf. These are the string type symbols referenced in Makefiles or scripts: ACPI_CUSTOM_DSDT_FILE ARC_BUILTIN_DTB_NAME ARC_TUNE_MCPU BUILTIN_DTB_SOURCE CC_IMPLICIT_FALLTHROUGH CC_VERSION_TEXT CFG80211_EXTRA_REGDB_KEYDIR EXTRA_FIRMWARE EXTRA_FIRMWARE_DIR EXTRA_TARGETS H8300_BUILTIN_DTB INITRAMFS_SOURCE LOCALVERSION MODULE_SIG_HASH MODULE_SIG_KEY NDS32_BUILTIN_DTB NIOS2_DTB_SOURCE OPENRISC_BUILTIN_DTB SOC_CANAAN_K210_DTB_SOURCE SYSTEM_BLACKLIST_HASH_LIST SYSTEM_REVOCATION_KEYS SYSTEM_TRUSTED_KEYS TARGET_CPU UNUSED_KSYMS_WHITELIST XILINX_MICROBLAZE0_FAMILY XILINX_MICROBLAZE0_HW_VER XTENSA_VARIANT_NAME I checked them one by one, and fixed up the code where necessary. Signed-off-by: Masahiro Yamada --- arch/sh/boot/dts/Makefile | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'arch/sh') diff --git a/arch/sh/boot/dts/Makefile b/arch/sh/boot/dts/Makefile index c17d65b82abe..4a6dec9714a9 100644 --- a/arch/sh/boot/dts/Makefile +++ b/arch/sh/boot/dts/Makefile @@ -1,4 +1,2 @@ # SPDX-License-Identifier: GPL-2.0-only -ifneq ($(CONFIG_BUILTIN_DTB_SOURCE),"") -obj-$(CONFIG_USE_BUILTIN_DTB) += $(patsubst "%",%,$(CONFIG_BUILTIN_DTB_SOURCE)).dtb.o -endif +obj-$(CONFIG_USE_BUILTIN_DTB) += $(addsuffix .dtb.o, $(CONFIG_BUILTIN_DTB_SOURCE)) -- cgit v1.2.3 From 82977af93a0dc4e70f60ca2137b67f65ebe47fc7 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 10 Jan 2022 03:15:25 +0900 Subject: sh: rename suffix-y to suffix_y 'export suffix-y' does not work reliably because hyphens are disallowed in shell variables. A similar issue was fixed by commit 2bfbe7881ee0 ("kbuild: Do not use hyphen in exported variable name"). If I do similar in dash, ARCH=sh fails to build. $ mv linux linux~ $ cd linux~ $ dash $ make O=foo/bar ARCH=sh CROSS_COMPILE=sh4-linux-gnu- defconfig all make[1]: Entering directory '/home/masahiro/linux~/foo/bar' [ snip ] make[4]: *** No rule to make target 'arch/sh/boot/compressed/vmlinux.bin.', needed by 'arch/sh/boot/compressed/piggy.o'. Stop. make[3]: *** [/home/masahiro/linux~/arch/sh/boot/Makefile:40: arch/sh/boot/compressed/vmlinux] Error 2 make[2]: *** [/home/masahiro/linux~/arch/sh/Makefile:194: zImage] Error 2 make[1]: *** [/home/masahiro/linux~/Makefile:350: __build_one_by_one] Error 2 make[1]: Leaving directory '/home/masahiro/linux~/foo/bar' make: *** [Makefile:219: __sub-make] Error 2 The maintainer of GNU Make stated that there is no consistent way to export variables that do not meet the shell's naming criteria. (https://savannah.gnu.org/bugs/?55719) Consequently, you cannot use hyphens in exported variables. Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier --- arch/sh/boot/Makefile | 16 ++++++++-------- arch/sh/boot/compressed/Makefile | 2 +- 2 files changed, 9 insertions(+), 9 deletions(-) (limited to 'arch/sh') diff --git a/arch/sh/boot/Makefile b/arch/sh/boot/Makefile index 5c123f5b2797..1f5d2df3c7e0 100644 --- a/arch/sh/boot/Makefile +++ b/arch/sh/boot/Makefile @@ -19,12 +19,12 @@ CONFIG_ZERO_PAGE_OFFSET ?= 0x00001000 CONFIG_ENTRY_OFFSET ?= 0x00001000 CONFIG_PHYSICAL_START ?= $(CONFIG_MEMORY_START) -suffix-y := bin -suffix-$(CONFIG_KERNEL_GZIP) := gz -suffix-$(CONFIG_KERNEL_BZIP2) := bz2 -suffix-$(CONFIG_KERNEL_LZMA) := lzma -suffix-$(CONFIG_KERNEL_XZ) := xz -suffix-$(CONFIG_KERNEL_LZO) := lzo +suffix_y := bin +suffix_$(CONFIG_KERNEL_GZIP) := gz +suffix_$(CONFIG_KERNEL_BZIP2) := bz2 +suffix_$(CONFIG_KERNEL_LZMA) := lzma +suffix_$(CONFIG_KERNEL_XZ) := xz +suffix_$(CONFIG_KERNEL_LZO) := lzo targets := zImage vmlinux.srec romImage uImage uImage.srec uImage.gz \ uImage.bz2 uImage.lzma uImage.xz uImage.lzo uImage.bin \ @@ -106,10 +106,10 @@ OBJCOPYFLAGS_uImage.srec := -I binary -O srec $(obj)/uImage.srec: $(obj)/uImage FORCE $(call if_changed,objcopy) -$(obj)/uImage: $(obj)/uImage.$(suffix-y) +$(obj)/uImage: $(obj)/uImage.$(suffix_y) @ln -sf $(notdir $<) $@ @echo ' Image $@ is ready' export CONFIG_PAGE_OFFSET CONFIG_MEMORY_START CONFIG_BOOT_LINK_OFFSET \ CONFIG_PHYSICAL_START CONFIG_ZERO_PAGE_OFFSET CONFIG_ENTRY_OFFSET \ - KERNEL_MEMORY suffix-y + KERNEL_MEMORY suffix_y diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile index cf3174df7859..c1eb9a62de55 100644 --- a/arch/sh/boot/compressed/Makefile +++ b/arch/sh/boot/compressed/Makefile @@ -64,5 +64,5 @@ OBJCOPYFLAGS += -R .empty_zero_page LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T -$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y) FORCE +$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE $(call if_changed,ld) -- cgit v1.2.3 From 7ce7e984ab2b218d6e92d5165629022fe2daf9ee Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 10 Jan 2022 03:15:27 +0900 Subject: 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 Reviewed-by: Nicolas Schier --- arch/sh/boot/compressed/Makefile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/sh') diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile index c1eb9a62de55..a6808a403f4b 100644 --- a/arch/sh/boot/compressed/Makefile +++ b/arch/sh/boot/compressed/Makefile @@ -52,13 +52,13 @@ vmlinux.bin.all-y := $(obj)/vmlinux.bin $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE $(call if_changed,gzip) $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE - $(call if_changed,bzip2) + $(call if_changed,bzip2_with_size) $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzma) + $(call if_changed,lzma_with_size) $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE - $(call if_changed,xzkern) + $(call if_changed,xzkern_with_size) $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE - $(call if_changed,lzo) + $(call if_changed,lzo_with_size) OBJCOPYFLAGS += -R .empty_zero_page -- cgit v1.2.3 From 53e7b5dfb752399cd903ecb6e921dcaef57c8ea5 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 10 Jan 2022 03:15:28 +0900 Subject: arch: decompressor: remove useless vmlinux.bin.all-y Presumably, arch/{parisc,s390,sh}/boot/compressed/Makefile copied arch/x86/boot/compressed/Makefile, but vmlinux.bin.all-y is useless here because it is the same as $(obj)/vmlinux.bin. Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier --- arch/sh/boot/compressed/Makefile | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) (limited to 'arch/sh') diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile index a6808a403f4b..591125c42d49 100644 --- a/arch/sh/boot/compressed/Makefile +++ b/arch/sh/boot/compressed/Makefile @@ -47,17 +47,15 @@ $(obj)/vmlinux: $(addprefix $(obj)/, $(OBJECTS)) FORCE $(obj)/vmlinux.bin: vmlinux FORCE $(call if_changed,objcopy) -vmlinux.bin.all-y := $(obj)/vmlinux.bin - -$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE +$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE $(call if_changed,gzip) -$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE +$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE $(call if_changed,bzip2_with_size) -$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE +$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE $(call if_changed,lzma_with_size) -$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE +$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE $(call if_changed,xzkern_with_size) -$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE +$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE $(call if_changed,lzo_with_size) OBJCOPYFLAGS += -R .empty_zero_page -- cgit v1.2.3