The patch titled
Subject: kernel: add support for .init_array.* constructors
has been removed from the -mm tree. Its filename was
kernel-add-support-for-init_array-constructors.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
Subject: kernel: add support for .init_array.* constructors
KASan uses constructors for initializing redzones for global variables.
Globals instrumentation in GCC 4.9.2 produces constructors with priority
(.init_array.00099)
Currently kernel ignores such constructors. Only constructors with
default priority supported (.init_array)
This patch adds support for constructors with priorities. For kernel
image we put pointers to constructors between __ctors_start/__ctors_end
and do_ctors() will call them on start up. For modules we merge
.init_array.* sections into resulting .init_array. Module code properly
handles constructors in .init_array section.
Signed-off-by: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Konstantin Serebryany <kcc@xxxxxxxxxx>
Cc: Dmitry Chernenkov <dmitryc@xxxxxxxxxx>
Signed-off-by: Andrey Konovalov <adech.fo@xxxxxxxxx>
Cc: Yuri Gribov <tetra2005@xxxxxxxxx>
Cc: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Cc: Sasha Levin <sasha.levin@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/vmlinux.lds.h | 1 +
scripts/module-common.lds | 3 +++
2 files changed, 4 insertions(+)
diff -puN include/asm-generic/vmlinux.lds.h~kernel-add-support-for-init_array-constructors include/asm-generic/vmlinux.lds.h
--- a/include/asm-generic/vmlinux.lds.h~kernel-add-support-for-init_array-constructors
+++ a/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 -puN scripts/module-common.lds~kernel-add-support-for-init_array-constructors scripts/module-common.lds
--- a/scripts/module-common.lds~kernel-add-support-for-init_array-constructors
+++ a/scripts/module-common.lds
@@ -16,4 +16,7 @@ SECTIONS {
__kcrctab_unused 0 : { *(SORT(___kcrctab_unused+*)) }
__kcrctab_unused_gpl 0 : { *(SORT(___kcrctab_unused_gpl+*)) }
__kcrctab_gpl_future 0 : { *(SORT(___kcrctab_gpl_future+*)) }
+
+ . = ALIGN(8);
+ .init_array 0 : { *(SORT(.init_array.*)) *(.init_array) }
}
_
Patches currently in -mm which might be from a.ryabinin@xxxxxxxxxxx are
origin.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
