From ef721987aef0cc0abba08c88810f2155f76b0b1f Mon Sep 17 00:00:00 2001 From: Stefani Seibold Date: Mon, 17 Mar 2014 23:22:07 +0100 Subject: [PATCH] x86, vdso: Introduce VVAR marco for vdso32 This patch revamps the vvar.h for introduce the VVAR macro for vdso32. Reviewed-by: Andy Lutomirski Signed-off-by: Stefani Seibold Link: http://lkml.kernel.org/r/1395094933-14252-8-git-send-email-stefani@seibold.net Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/vvar.h | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/vvar.h b/arch/x86/include/asm/vvar.h index 0a534ea..52c79ffc 100644 --- a/arch/x86/include/asm/vvar.h +++ b/arch/x86/include/asm/vvar.h @@ -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) */ -- 2.7.4