Re: MIPS: bug: gettimeofday syscall broken on CI20 board

[Thomas Bogendoerfer]

On Thu, Nov 28, 2019 at 02:48:46PM +0100, H. Nikolaus Schaller wrote:
> 
> What still does not fit into the picture is the errno = 1 i.e. EPERM.
> Maybe I have to study the libc code that tries to read the ELF symbols
> you have mentioned. It may fail for unknown reasons.

to understand vdso you might look at arch/mips/vdso and lib/vdso
kernel sources.

And if I understand it correctly you neither have a working high resolution
timer usable bei do_hres() in lib/vdso/gettimeofday.c or a working
gettimeofday_fallback(), which is enabled via CONFIG_MIPS_CLOCK_VSYSCALL
and needs either CSRC_R4K or CLKSRC_MIPS_GIC.

Thomas.

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