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| 1 | /* |
| 2 | initramfs_data includes the compressed binary that is the |
| 3 | filesystem used for early user space. |
| 4 | Note: Older versions of "as" (prior to binutils 2.11.90.0.23 |
| 5 | released on 2001-07-14) dit not support .incbin. |
| 6 | If you are forced to use older binutils than that then the |
| 7 | following trick can be applied to create the resulting binary: |
| 8 | |
| 9 | |
| 10 | ld -m elf_i386 --format binary --oformat elf32-i386 -r \ |
| 11 | -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o |
| 12 | ld -m elf_i386 -r -o built-in.o initramfs_data.o |
| 13 | |
| 14 | initramfs_data.scr looks like this: |
| 15 | SECTIONS |
| 16 | { |
| 17 | .init.ramfs : { *(.data) } |
| 18 | } |
| 19 | |
| 20 | The above example is for i386 - the parameters vary from architectures. |
| 21 | Eventually look up LDFLAGS_BLOB in an older version of the |
| 22 | arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced. |
| 23 | |
| 24 | Using .incbin has the advantage over ld that the correct flags are set |
| 25 | in the ELF header, as required by certain architectures. |
| 26 | */ |
| 27 | |
| 28 | .section .init.ramfs,"a" |
| 29 | .incbin "usr/initramfs_data.cpio.bz2" |
| 30 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9
