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2a2a400f66
Add the necessary parts to be enable the use of LZO-compressed initramfs build into the kernel. Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
30 lines
1.0 KiB
ArmAsm
30 lines
1.0 KiB
ArmAsm
/*
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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.lzo"
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