Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH v10 1/3] arm64: Add __NR_* definitions for compat syscalls | Date | Wed, 28 Jan 2015 22:35:01 +0100 |
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On Wednesday 28 January 2015 15:31:49 Timur Tabi wrote: > On Fri, Jul 4, 2014 at 2:28 AM, AKASHI Takahiro > <takahiro.akashi@linaro.org> wrote: > > +#define __ARM_NR_COMPAT_BASE 0x0f0000 > > +#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE+2) > > +#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE+5) > > I know this patch is six months old, but I was wondering if anyone > knows of any plans to make these syscalls available to 64-bit apps? > We have a 32-bit app that uses __ARM_NR_compat_cacheflush, and we'd > like to port that app to 64-bit. I'm just not sure how to start doing > that, since there don't appear to be any 64-bit ARM-specific syscalls. >
You can add architecture specific syscalls by using the 16 numbers following __NR_arch_specific_syscall. Whether it makes sense to have a cacheflush syscall on arm64, I have no idea.
I believe that we should not need a set_tls syscall though.
Arnd
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