linux-kernel - [PATCH 1/3] scripts/sorttable: Change section type of orc_lookup to SHT

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Date:   Wed,  3 Jun 2020 22:39:43 +0800
From:   Huaixin Chang <changhuaixin@...ux.alibaba.com>
To:     jpoimboe@...hat.com
Cc:     bp@...en8.de, changhuaixin@...ux.alibaba.com, hpa@...or.com,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        luto@...capital.net, michal.lkml@...kovi.net, mingo@...hat.com,
        peterz@...radead.org, tglx@...utronix.de, x86@...nel.org,
        yamada.masahiro@...ionext.com
Subject: [PATCH 1/3] scripts/sorttable: Change section type of orc_lookup to SHT_PROGBITS

In order to edit orc_lookup table via sorttable, type of section
orc_lookup needs to be SHT_PROGBITS instead of SHT_NOBITS.

Linker script doesn't seem to allow manual specification of the section
type, so just write a byte into the section instead.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Signed-off-by: Huaixin Chang <changhuaixin@...ux.alibaba.com>
Signed-off-by: Shile Zhang <shile.zhang@...ux.alibaba.com>
---
 include/asm-generic/vmlinux.lds.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index db600ef218d7..49f4f5bc6165 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -826,6 +826,8 @@
 		. += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) /	\
 			LOOKUP_BLOCK_SIZE) + 1) * 4;			\
 		orc_lookup_end = .;					\
+		/* HACK: force SHT_PROGBITS so sorttable can edit: */	\
+		BYTE(1);						\
 	}
 #else
 #define ORC_UNWIND_TABLE
-- 
2.14.4.44.g2045bb6