| initramfs_data includes the compressed binary that is the |
| filesystem used for early user space. |
| Note: Older versions of "as" (prior to binutils 2.11.90.0.23 |
| released on 2001-07-14) dit not support .incbin. |
| If you are forced to use older binutils than that then the |
| following trick can be applied to create the resulting binary: |
| ld -m elf_i386 --format binary --oformat elf32-i386 -r \ |
| -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o |
| ld -m elf_i386 -r -o built-in.o initramfs_data.o |
| initramfs_data.scr looks like this: |
| .init.ramfs : { *(.data) } |
| The above example is for i386 - the parameters vary from architectures. |
| Eventually look up LDFLAGS_BLOB in an older version of the |
| arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced. |
| Using .incbin has the advantage over ld that the correct flags are set |
| in the ELF header, as required by certain architectures. |
| .incbin "usr/initramfs_data.cpio.bz2" |