| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* | |
| 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.a initramfs_data.o | |
| For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds. | |
| 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. | |
| */ | |
| .section .init.ramfs,"a" | |
| __irf_start: | |
| .incbin "usr/initramfs_inc_data" | |
| __irf_end: | |
| .section .init.ramfs.info,"a" | |
| .globl __initramfs_size | |
| __initramfs_size: | |
| #ifdef CONFIG_64BIT | |
| .quad __irf_end - __irf_start | |
| #else | |
| .long __irf_end - __irf_start | |
| #endif |