Root/
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" |
30 | |
31 |
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