target/linux/generic/backport-5.10/311-v5.11-MIPS-zboot-put-appended-dtb-into-a-section.patch

   1 From 7d1531c81c0fb4c93bea8dc316043ad0e4d0c270 Mon Sep 17 00:00:00 2001
   2 From: Chuanhong Guo <gch981213@gmail.com>
   3 Date: Sun, 25 Oct 2020 23:19:40 +0800
   4 Subject: [PATCH] MIPS: zboot: put appended dtb into a section
   5
   6 This will make a separated section for dtb appear in ELF, and we can
   7 then use objcopy to patch a dtb into vmlinuz when RAW_APPENDED_DTB
   8 is set in kernel config.
   9
  10 command to patch a dtb:
  11 objcopy --set-section-flags=.appended_dtb=alloc,contents \
  12         --update-section=.appended_dtb=<target>.dtb vmlinuz vmlinuz-dtb
  13
  14 Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
  15 ---
  16  arch/mips/boot/compressed/ld.script | 9 ++++++---
  17  1 file changed, 6 insertions(+), 3 deletions(-)
  18
  19 --- a/arch/mips/boot/compressed/ld.script
  20 +++ b/arch/mips/boot/compressed/ld.script
  21 @@ -31,9 +31,12 @@ SECTIONS
  22                 CONSTRUCTORS
  23                 . = ALIGN(16);
  24         }
  25 -       __appended_dtb = .;
  26 -       /* leave space for appended DTB */
  27 -       . += 0x100000;
  28 +
  29 +       .appended_dtb : {
  30 +               __appended_dtb = .;
  31 +               /* leave space for appended DTB */
  32 +               . += 0x100000;
  33 +       }
  34
  35         _edata = .;
  36         /* End of data section */