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x86: Add build salt to the vDSO

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The vDSO needs to have a unique build id in a similar manner
to the kernel and modules. Use the build salt macro.

Acked-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Laura Abbott 2018-07-05 17:49:38 -07:00 committed by Masahiro Yamada
parent 9afb719e70
commit d623f60df0
2 changed files with 6 additions and 0 deletions
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3
arch/x86/entry/vdso/vdso-note.S
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@ -3,6 +3,7 @@
* Here we can supply some information useful to userland.
*/
#include <linux/build-salt.h>
#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>
@ -10,3 +11,5 @@
ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END
BUILD_SALT

3
arch/x86/entry/vdso/vdso32/note.S
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@ -4,6 +4,7 @@
* Here we can supply some information useful to userland.
*/
#include <linux/build-salt.h>
#include <linux/version.h>
#include <linux/elfnote.h>
@ -14,6 +15,8 @@ ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END
BUILD_SALT
#ifdef CONFIG_XEN
/*
* Add a special note telling glibc's dynamic linker a fake hardware