diff options
author | Alain Knaff <alain@knaff.lu> | 2009-01-07 00:10:27 -0800 |
---|---|---|
committer | H. Peter Anvin <hpa@zytor.com> | 2009-01-07 00:10:27 -0800 |
commit | a26ee60f90daffe1de6be0d093af86e7279b3dfd (patch) | |
tree | 01239fb6b173ff46711480b9601c69b92e1715a5 /usr/initramfs_data.lzma.S | |
parent | fb9a4ca9820fd4d7c4906bd393004662451e273e (diff) |
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>
Diffstat (limited to 'usr/initramfs_data.lzma.S')
-rw-r--r-- | usr/initramfs_data.lzma.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/usr/initramfs_data.lzma.S b/usr/initramfs_data.lzma.S new file mode 100644 index 00000000000..e11469e4856 --- /dev/null +++ b/usr/initramfs_data.lzma.S @@ -0,0 +1,29 @@ +/* + initramfs_data includes the compressed binary that is the + filesystem used for early user space. + Note: Older versions of "as" (prior to binutils 2.11.90.0.23 + released on 2001-07-14) dit not support .incbin. + If you are forced to use older binutils than that then the + following trick can be applied to create the resulting binary: + + + ld -m elf_i386 --format binary --oformat elf32-i386 -r \ + -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o + ld -m elf_i386 -r -o built-in.o initramfs_data.o + + initramfs_data.scr looks like this: +SECTIONS +{ + .init.ramfs : { *(.data) } +} + + The above example is for i386 - the parameters vary from architectures. + Eventually look up LDFLAGS_BLOB in an older version of the + arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced. + + Using .incbin has the advantage over ld that the correct flags are set + in the ELF header, as required by certain architectures. +*/ + +.section .init.ramfs,"a" +.incbin "usr/initramfs_data.cpio.lzma" |