From 9a168b51c3a60c95ccd349dd3010615ba6b0e033 Mon Sep 17 00:00:00 2001 From: John Thomson Date: Thu, 15 Oct 2020 19:06:41 +1000 Subject: build: image: add append-dtb-elf helper The mips kernel vmlinux image supports adding an empty ELF section for DTB to be later inserted into with MIPS_ELF_APPENDED_DTB. This ELF + inserted DTB image can then be directly booted on some devices. Example usage: image/subtarget.mk: KERNEL_NAME := vmlinux.elf KERNEL_INITRAMFS_NAME := vmlinux-initramfs.elf KERNEL := kernel-bin | append-dtb-elf On mt7621 memory size needed to be manually specified. Signed-off-by: John Thomson --- include/image-commands.mk | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/image-commands.mk') diff --git a/include/image-commands.mk b/include/image-commands.mk index 740d627fc7..ea94059d20 100644 --- a/include/image-commands.mk +++ b/include/image-commands.mk @@ -142,6 +142,13 @@ define Build/append-dtb cat $(KDIR)/image-$(firstword $(DEVICE_DTS)).dtb >> $@ endef +define Build/append-dtb-elf + $(TARGET_CROSS)objcopy \ + --set-section-flags=.appended_dtb=alloc,contents \ + --update-section \ + .appended_dtb=$(KDIR)/image-$(firstword $(DEVICE_DTS)).dtb $@ +endef + define Build/install-dtb $(call locked, \ $(foreach dts,$(DEVICE_DTS), \ -- cgit v1.2.3