| /* 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. |
| */ |
| |
| #include <linux/stringify.h> |
| #include <asm-generic/vmlinux.lds.h> |
| |
| .section .init.ramfs,"a" |
| __irf_start: |
| .incbin __stringify(INITRAMFS_IMAGE) |
| __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 |
