Re: Need help in understanding x86 syscall

Steven Rostedt
2005-08-11T16:19:57Z

On Thu, 2005-08-11 at 11:51 -0400, Steven Rostedt wrote:
>
> And booted it. The system is up and running, so I really don't think
> that the sysenter_entry is used for system calls.
>
> Not so "Clear as day"!

And so, looking into sysenter_entry, it seems that my configurations
don't seem to use it. This jumps straight to system_call without ever
having to turn interrupts on.

# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 3
cpu MHz : 367.939
cache size : 256 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 sse
bogomips : 722.94

-- Steve