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x86, vdso: Introduce VVAR marco for vdso32

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This patch revamps the vvar.h for introduce the VVAR macro for vdso32.

Reviewed-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Link: http://lkml.kernel.org/r/1395094933-14252-8-git-send-email-stefani@seibold.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Stefani Seibold 2014-03-17 23:22:07 +01:00 committed by H. Peter Anvin
parent 0df1ea2b79
commit ef721987ae
1 changed files with 12 additions and 2 deletions
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14
arch/x86/include/asm/vvar.h
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@ -26,6 +26,15 @@
#else
#ifdef BUILD_VDSO32
#define DECLARE_VVAR(offset, type, name) \
extern type vvar_ ## name __attribute__((visibility("hidden")));
#define VVAR(name) (vvar_ ## name)
#else
extern char __vvar_page;
/* Base address of vvars. This is not ABI. */
@ -39,12 +48,13 @@ extern char __vvar_page;
static type const * const vvaraddr_ ## name = \
(void *)(VVAR_ADDRESS + (offset));
#define VVAR(name) (*vvaraddr_ ## name)
#endif
#define DEFINE_VVAR(type, name) \
type name \
__attribute__((section(".vvar_" #name), aligned(16))) __visible
#define VVAR(name) (*vvaraddr_ ## name)
#endif
/* DECLARE_VVAR(offset, type, name) */