mirror of https://gitee.com/openkylin/linux.git
bzip2/lzma: fix built-in initramfs vs CONFIG_RD_GZIP
Impact: Resolves build failures in some configurations Makes it possible to disable CONFIG_RD_GZIP . In that case, the built-in initramfs will be compressed by whatever compressor is available (bzip2 or lzma) or left uncompressed if none is available. It also removes a couple of warnings which occur when no ramdisk compression at all is chosen. It also restores the select ZLIB_INFLATE in drivers/block/Kconfig which somehow came missing. This is needed to activate compilation of the stuff in zlib_deflate. Signed-off-by: Alain Knaff <alain@knaff.lu> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Alain Knaff
H. Peter Anvin
parent
fb9a4ca982
commit
a26ee60f90
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@ -389,7 +389,7 @@ static int __init write_buffer(char *buf, unsigned len)
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return len - count;
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}
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#if defined CONFIG_RD_GZIP || defined CONFIG_RD_BZIP2 || defined CONFIG_RD_LZMA
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static int __init flush_buffer(void *bufv, unsigned len)
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{
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char *buf = (char *) bufv;
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@ -412,6 +412,7 @@ static int __init flush_buffer(void *bufv, unsigned len)
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}
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return origLen;
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}
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#endif
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static unsigned my_inptr; /* index of next byte to be processed in inbuf */
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@ -449,10 +450,12 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
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continue;
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}
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this_header = 0;
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#ifdef CONFIG_RD_GZIP
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if (!gunzip(buf, len, NULL, flush_buffer, NULL,
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&my_inptr, error) &&
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message == NULL)
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goto ok;
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#endif
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#ifdef CONFIG_RD_BZIP2
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message = NULL; /* Zero out message, or else cpio will
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@ -473,7 +476,9 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
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goto ok;
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}
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#endif
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#if defined CONFIG_RD_GZIP || defined CONFIG_RD_BZIP2 || defined CONFIG_RD_LZMA
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ok:
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#endif
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if (state != Reset)
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error("junk in compressed archive");
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this_header = saved_offset + my_inptr;
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@ -5,7 +5,7 @@
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# Released under the terms of the GNU GPL
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#
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# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
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# the cpio archive, and gzip to pack it.
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# the cpio archive, and then compresses it.
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# The script may also be used to generate the inputfile used for gen_init_cpio
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# This script assumes that gen_init_cpio is located in usr/ directory
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@ -16,8 +16,8 @@ usage() {
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cat << EOF
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Usage:
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$0 [-o <file>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
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-o <file> Create gzipped initramfs file named <file> using
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gen_init_cpio and gzip
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-o <file> Create compressed initramfs file named <file> using
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gen_init_cpio and compressor depending on the extension
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-u <uid> User ID to map to user ID 0 (root).
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<uid> is only meaningful if <cpio_source> is a
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directory. "squash" forces all files to uid 0.
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@ -225,6 +225,7 @@ cpio_list=
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output="/dev/stdout"
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output_file=""
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is_cpio_compressed=
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compr="gzip -9 -f"
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arg="$1"
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case "$arg" in
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@ -233,11 +234,15 @@ case "$arg" in
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echo "deps_initramfs := \\"
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shift
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;;
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"-o") # generate gzipped cpio image named $1
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"-o") # generate compressed cpio image named $1
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shift
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output_file="$1"
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cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
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output=${cpio_list}
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echo "$output_file" | grep -q "\.gz$" && compr="gzip -9 -f"
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echo "$output_file" | grep -q "\.bz2$" && compr="bzip2 -9 -f"
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echo "$output_file" | grep -q "\.lzma$" && compr="lzma -9 -f"
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echo "$output_file" | grep -q "\.cpio$" && compr="cat"
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shift
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;;
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esac
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@ -274,7 +279,7 @@ while [ $# -gt 0 ]; do
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esac
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done
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# If output_file is set we will generate cpio archive and gzip it
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# If output_file is set we will generate cpio archive and compress it
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# we are carefull to delete tmp files
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if [ ! -z ${output_file} ]; then
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if [ -z ${cpio_file} ]; then
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@ -287,7 +292,7 @@ if [ ! -z ${output_file} ]; then
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if [ "${is_cpio_compressed}" = "compressed" ]; then
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cat ${cpio_tfile} > ${output_file}
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else
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cat ${cpio_tfile} | gzip -f -9 - > ${output_file}
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cat ${cpio_tfile} | ${compr} - > ${output_file}
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fi
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[ -z ${cpio_file} ] && rm ${cpio_tfile}
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fi
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42
usr/Makefile
42
usr/Makefile
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@ -5,14 +5,32 @@
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klibcdirs:;
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PHONY += klibcdirs
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# Find out "preferred" ramdisk compressor. Order of preference is
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# 1. bzip2 efficient, and likely to be present
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# 2. gzip former default
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# 3. lzma
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# 4. none
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# None of the above
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suffix_y =
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# Lzma, but no gzip nor bzip2
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suffix_$(CONFIG_RD_LZMA) = .lzma
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# Gzip, but no bzip2
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suffix_$(CONFIG_RD_GZIP) = .gz
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# Bzip2
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suffix_$(CONFIG_RD_BZIP2) = .bz2
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# Generate builtin.o based on initramfs_data.o
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obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
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obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o
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# initramfs_data.o contains the initramfs_data.cpio.gz image.
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# initramfs_data.o contains the compressed initramfs_data.cpio image.
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# The image is included using .incbin, a dependency which is not
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# tracked automatically.
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$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
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$(obj)/initramfs_data$(suffix_y).o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE
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#####
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# Generate the initramfs cpio archive
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@ -25,28 +43,28 @@ ramfs-args := \
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$(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
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$(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
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# .initramfs_data.cpio.gz.d is used to identify all files included
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# .initramfs_data.cpio.d is used to identify all files included
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# in initramfs and to detect if any files are added/removed.
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# Removed files are identified by directory timestamp being updated
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# The dependency list is generated by gen_initramfs.sh -l
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ifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),)
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include $(obj)/.initramfs_data.cpio.gz.d
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ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),)
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include $(obj)/.initramfs_data.cpio.d
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endif
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quiet_cmd_initfs = GEN $@
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cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
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targets := initramfs_data.cpio.gz
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targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio
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# do not try to update files included in initramfs
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$(deps_initramfs): ;
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$(deps_initramfs): klibcdirs
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# We rebuild initramfs_data.cpio.gz if:
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# 1) Any included file is newer then initramfs_data.cpio.gz
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# We rebuild initramfs_data.cpio if:
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# 1) Any included file is newer then initramfs_data.cpio
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# 2) There are changes in which files are included (added or deleted)
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# 3) If gen_init_cpio are newer than initramfs_data.cpio.gz
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# 3) If gen_init_cpio are newer than initramfs_data.cpio
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# 4) arguments to gen_initramfs.sh changes
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$(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
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$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d
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$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
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$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d
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$(call if_changed,initfs)
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@ -26,5 +26,5 @@ SECTIONS
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*/
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.section .init.ramfs,"a"
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.incbin "usr/initramfs_data.cpio.gz"
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.incbin "usr/initramfs_data.cpio"
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@ -0,0 +1,29 @@
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/*
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initramfs_data includes the compressed binary that is the
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filesystem used for early user space.
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Note: Older versions of "as" (prior to binutils 2.11.90.0.23
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released on 2001-07-14) dit not support .incbin.
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If you are forced to use older binutils than that then the
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following trick can be applied to create the resulting binary:
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ld -m elf_i386 --format binary --oformat elf32-i386 -r \
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-T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
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ld -m elf_i386 -r -o built-in.o initramfs_data.o
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initramfs_data.scr looks like this:
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SECTIONS
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{
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.init.ramfs : { *(.data) }
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}
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The above example is for i386 - the parameters vary from architectures.
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Eventually look up LDFLAGS_BLOB in an older version of the
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arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
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Using .incbin has the advantage over ld that the correct flags are set
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in the ELF header, as required by certain architectures.
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*/
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.section .init.ramfs,"a"
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.incbin "usr/initramfs_data.cpio.bz2"
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@ -0,0 +1,29 @@
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/*
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initramfs_data includes the compressed binary that is the
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filesystem used for early user space.
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Note: Older versions of "as" (prior to binutils 2.11.90.0.23
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released on 2001-07-14) dit not support .incbin.
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If you are forced to use older binutils than that then the
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following trick can be applied to create the resulting binary:
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ld -m elf_i386 --format binary --oformat elf32-i386 -r \
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-T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
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ld -m elf_i386 -r -o built-in.o initramfs_data.o
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initramfs_data.scr looks like this:
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SECTIONS
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{
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.init.ramfs : { *(.data) }
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}
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The above example is for i386 - the parameters vary from architectures.
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Eventually look up LDFLAGS_BLOB in an older version of the
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arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
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Using .incbin has the advantage over ld that the correct flags are set
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in the ELF header, as required by certain architectures.
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*/
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.section .init.ramfs,"a"
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.incbin "usr/initramfs_data.cpio.gz"
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@ -0,0 +1,29 @@
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/*
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initramfs_data includes the compressed binary that is the
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filesystem used for early user space.
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Note: Older versions of "as" (prior to binutils 2.11.90.0.23
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released on 2001-07-14) dit not support .incbin.
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If you are forced to use older binutils than that then the
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following trick can be applied to create the resulting binary:
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ld -m elf_i386 --format binary --oformat elf32-i386 -r \
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-T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
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ld -m elf_i386 -r -o built-in.o initramfs_data.o
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initramfs_data.scr looks like this:
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SECTIONS
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{
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.init.ramfs : { *(.data) }
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}
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The above example is for i386 - the parameters vary from architectures.
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Eventually look up LDFLAGS_BLOB in an older version of the
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arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
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Using .incbin has the advantage over ld that the correct flags are set
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in the ELF header, as required by certain architectures.
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*/
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.section .init.ramfs,"a"
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.incbin "usr/initramfs_data.cpio.lzma"
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