diff options
| author | Will Deacon <will.deacon@arm.com> | 2012-03-05 11:49:31 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 13:42:09 +0100 |
| commit | 9031fefde6f2ac1d1e5e0f8f4b22db4a091229bb (patch) | |
| tree | a0663ffbc50293991604badf82f263dd50c009c7 /arch/arm64/kernel/vdso/note.S | |
| parent | 7992d60dc46576bc6f6429d87f313462141db6d2 (diff) | |
| download | linux-9031fefde6f2ac1d1e5e0f8f4b22db4a091229bb.tar.bz2 | |
arm64: VDSO support
This patch adds VDSO support for 64-bit applications. The VDSO code is
currently used for sys_rt_sigreturn() and optimised gettimeofday()
(using the user-accessible generic counter).
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm64/kernel/vdso/note.S')
| -rw-r--r-- | arch/arm64/kernel/vdso/note.S | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm64/kernel/vdso/note.S b/arch/arm64/kernel/vdso/note.S new file mode 100644 index 000000000000..b82c85e5d972 --- /dev/null +++ b/arch/arm64/kernel/vdso/note.S @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2012 ARM Limited + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * Author: Will Deacon <will.deacon@arm.com> + * + * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text. + * Here we can supply some information useful to userland. + */ + +#include <linux/uts.h> +#include <linux/version.h> +#include <linux/elfnote.h> + +ELFNOTE_START(Linux, 0, "a") + .long LINUX_VERSION_CODE +ELFNOTE_END |