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Subject[PATCH] MIPS: zboot: put appended dtb into a section
Date
This will make a separated section for dtb appear in ELF, and we can
then use objcopy to patch a dtb into vmlinuz when RAW_APPENDED_DTB
is set in kernel config.

command to patch a dtb:
objcopy --set-section-flags=.appended_dtb=alloc,contents \
--update-section=.appended_dtb=<target>.dtb vmlinuz

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
---
Note:
This should supersede this patch on linux-mips:
[2/2] mips: boot compressed: add support for vlinuz ELF DTB [0]

[0] https://patchwork.kernel.org/project/linux-mips/patch/20201015201100.4130-2-git@johnthomson.fastmail.com.au/

arch/mips/boot/compressed/ld.script | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/mips/boot/compressed/ld.script b/arch/mips/boot/compressed/ld.script
index 2ed08fbef8e7..0ebb667274d6 100644
--- a/arch/mips/boot/compressed/ld.script
+++ b/arch/mips/boot/compressed/ld.script
@@ -31,9 +31,12 @@ SECTIONS
CONSTRUCTORS
. = ALIGN(16);
}
- __appended_dtb = .;
- /* leave space for appended DTB */
- . += 0x100000;
+
+ .appended_dtb : {
+ __appended_dtb = .;
+ /* leave space for appended DTB */
+ . += 0x100000;
+ }

_edata = .;
/* End of data section */
--
2.26.2
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