Re: [Valgrind-users] start_rstsc_calibration causes illegal instruction crash

[Nicholas N. <nj...@ca...>]

On Fri, 21 Nov 2003, Daniel Goertzen wrote:

> I am trying to run valgrind on a Cx486DX2 which has no CPUID or RDTSC
> instruction.
>
> I've managed to get past the CPUID in vg_startup.S with a hack suggested by
> Jeremy, but now I'm trying to figure out the best way around RDSTC.  The
> instuction is called by start_rdtsc_calibration() in vg_main.c.
>
> Suggestions?  I'm going to keep beating on it for now, but if someone can
> point me down the right path, great!

At a guess, try disabling the uses of RDTSC in
VG_(read_millisecond_timer)() and VG_(start_rdtsc_calibration)();  try
hard-coding in some reasonable values instead.

N