nds32: VDSO support
This patch adds VDSO support. The VDSO code is currently used for sys_rt_sigreturn() and optimised gettimeofday() (using the SoC timer counter). Signed-off-by: NVincent Chen <vincentc@andestech.com> Signed-off-by: NGreentime Hu <greentime@andestech.com> Acked-by: NArnd Bergmann <arnd@arndb.de>
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arch/nds32/include/asm/vdso.h
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arch/nds32/kernel/vdso.c
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arch/nds32/kernel/vdso/Makefile
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arch/nds32/kernel/vdso/datapage.S
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arch/nds32/kernel/vdso/note.S
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arch/nds32/kernel/vdso/vdso.S
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arch/nds32/kernel/vdso/vdso.lds.S
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