linux-kernel - [PATCH v10 15/17] kernel: add support for .init

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Message-id: <1422544321-24232-16-git-send-email-a.ryabinin@samsung.com>
Date:	Thu, 29 Jan 2015 18:11:59 +0300
From:	Andrey Ryabinin <a.ryabinin@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrey Ryabinin <a.ryabinin@...sung.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Konstantin Serebryany <kcc@...gle.com>,
	Dmitry Chernenkov <dmitryc@...gle.com>,
	Andrey Konovalov <adech.fo@...il.com>,
	Yuri Gribov <tetra2005@...il.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Christoph Lameter <cl@...ux.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Andi Kleen <andi@...stfloor.org>, x86@...nel.org,
	linux-mm@...ck.org, Arnd Bergmann <arnd@...db.de>,
	linux-arch@...r.kernel.org (open list:GENERIC INCLUDE/A...)
Subject: [PATCH v10 15/17] kernel: add support for .init_array.* constructors

KASan uses constructors for initializing redzones for global
variables. Actually KASan doesn't need priorities for constructors,
so they were removed from GCC 5.0, but GCC 4.9.2 still generates
constructors with priorities.

Signed-off-by: Andrey Ryabinin <a.ryabinin@...sung.com>
---
 include/asm-generic/vmlinux.lds.h | 1 +
 scripts/module-common.lds         | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index bee5d68..ac78910 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -478,6 +478,7 @@
 #define KERNEL_CTORS()	. = ALIGN(8);			   \
 			VMLINUX_SYMBOL(__ctors_start) = .; \
 			*(.ctors)			   \
+			*(SORT(.init_array.*))		   \
 			*(.init_array)			   \
 			VMLINUX_SYMBOL(__ctors_end) = .;
 #else
diff --git a/scripts/module-common.lds b/scripts/module-common.lds
index 0865b3e..01c5849 100644
--- a/scripts/module-common.lds
+++ b/scripts/module-common.lds
@@ -16,4 +16,7 @@ SECTIONS {
 	__kcrctab_unused	: { *(SORT(___kcrctab_unused+*)) }
 	__kcrctab_unused_gpl	: { *(SORT(___kcrctab_unused_gpl+*)) }
 	__kcrctab_gpl_future	: { *(SORT(___kcrctab_gpl_future+*)) }
+
+	. = ALIGN(8);
+	.init_array		: { *(SORT(.init_array.*)) *(.init_array) }
 }
-- 
2.2.2

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