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36 lines
1.2 KiB
36 lines
1.2 KiB
/* 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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