Messages in this thread Patch in this message | | | From | stefani@seibold ... | Subject | [PATCH v12 7/9] introduce VVAR marco for vdso32 | Date | Wed, 5 Feb 2014 09:20:02 +0100 |
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From: Stefani Seibold <stefani@seibold.net>
This patch revamp the vvar.h for introduce the VVAR macro for vdso32.
Signed-off-by: Stefani Seibold <stefani@seibold.net> --- arch/x86/include/asm/vvar.h | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-)
diff --git a/arch/x86/include/asm/vvar.h b/arch/x86/include/asm/vvar.h index 7cd69af..bf13dc5 100644 --- a/arch/x86/include/asm/vvar.h +++ b/arch/x86/include/asm/vvar.h @@ -16,15 +16,6 @@ * you mess up, the linker will catch it.) */ -/* Base address of vvars. This is not ABI. */ -#ifdef CONFIG_X86_64 -#define VVAR_ADDRESS (-10*1024*1024 - 4096) -#else -extern char __vvar_page; - -#define VVAR_ADDRESS (&__vvar_page) -#endif - #if defined(__VVAR_KERNEL_LDS) /* The kernel linker script defines its own magic to put vvars in the @@ -35,16 +26,35 @@ extern char __vvar_page; #else +#ifdef BUILD_VDSO32 + +#define DECLARE_VVAR(offset, type, name) \ + extern type vvar_ ## name __attribute__((visibility("hidden"))); + +#define VVAR(name) (vvar_ ## name) + +#else + +/* Base address of vvars. This is not ABI. */ +#ifdef CONFIG_X86_64 +#define VVAR_ADDRESS (-10*1024*1024 - 4096) +#else +extern char __vvar_page; + +#define VVAR_ADDRESS (&__vvar_page) +#endif + #define DECLARE_VVAR(offset, type, name) \ 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) */ -- 1.8.5.3
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