Re: [PATCH] Pentium Pro - sysenter - doublefault

[Richard Curnow]

* Jamie Lokier <jamie@xxxxxxxxxxxxx> [2003-08-26]:
> Could you please run this very simple userspace program for me, and
> report the result?
> 
> 	int main() { __asm__ ("sysenter"); return 0; }
> 
> I expect it to die with SIGILL on Pentium and earlier chips, and
> SIGSEGV on "good" PPro and later chips running kernels which don't
> enable the sysenter instruction.

OK, since I get something different to the other reports I saw:

 1:20PM-malvern-0-534-% ./sysenter
 1:20PM-malvern-STKFLT-535-% echo $?
144

/proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 5
model name      : Pentium II (Deschutes)
stepping        : 0
cpu MHz         : 333.495
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr
bogomips        : 657.40

uname -a:
Linux malvern 2.6.0-test2-mm5 #2 Fri Aug 8 12:06:50 BST 2003 i686 unknown

HTH

-- 
Richard \\\ SuperH Core+Debug Architect /// .. At home ..
  P.    /// richard.curnow@xxxxxxxxxx  ///  rc@xxxxxxxxxx
Curnow  \\\ http://www.superh.com/    ///  www.rc0.org.uk
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