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Currently, usr/gen_initramfs.sh takes care of all the use-cases:
[1] generates a cpio file unless CONFIG_INITRAMFS_SOURCE points to
a single cpio archive
[2] If CONFIG_INITRAMFS_SOURCE is the path to a cpio archive,
use it as-is.
[3] Compress the cpio file according to CONFIG_INITRAMFS_COMPRESSION_*
unless it is passed a compressed archive.
To simplify the script, move [2] and [3] to usr/Makefile.
If CONFIG_INITRAMFS_SOURCE is the path to a cpio archive, there is
no need to run this shell script.
For the cpio archive compression, you can re-use the rules from
scripts/Makefile.lib .
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
37 lines
1.2 KiB
ArmAsm
37 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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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.a initramfs_data.o
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For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds.
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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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__irf_start:
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.incbin "usr/initramfs_inc_data"
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__irf_end:
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.section .init.ramfs.info,"a"
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.globl __initramfs_size
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__initramfs_size:
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#ifdef CONFIG_64BIT
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.quad __irf_end - __irf_start
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#else
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.long __irf_end - __irf_start
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#endif
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