[PATCH 1/3] scripts/sorttable: Change section type of orc_lookup to SHT_PROGBITS

From: Huaixin Chang <changhuaixin@linux.alibaba.com>
To: jpoimboe@redhat.com
Cc: bp@alien8.de, changhuaixin@linux.alibaba.com, hpa@zytor.com,
	linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
	luto@amacapital.net, michal.lkml@markovi.net, mingo@redhat.com,
	peterz@infradead.org, tglx@linutronix.de, x86@kernel.org,
	yamada.masahiro@socionext.com
Subject: [PATCH 1/3] scripts/sorttable: Change section type of orc_lookup to SHT_PROGBITS
Date: Wed,  3 Jun 2020 22:31:21 +0800	[thread overview]
Message-ID: <20200603143123.57364-2-changhuaixin@linux.alibaba.com> (raw)
In-Reply-To: <20200603143123.57364-1-changhuaixin@linux.alibaba.com>

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@redhat.com>
Signed-off-by: Huaixin Chang <changhuaixin@linux.alibaba.com>
Signed-off-by: Shile Zhang <shile.zhang@linux.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

