> vex amd64->IR: unhandled instruction bytes: 0xFA 0x89 0xF8 0xF 0xA2 0xF
> ==12793== Illegal opcode at address 0xC8EEBDD
> ==12793== at 0xC8EEBDD: cpu_calibrate (cpu-x86.h:61)
> Line 61 is asm volatile ("cli") in the following function:
>
> static inline void __cpu_lock(void)
> {
> if (_cpu_caps & (1 << CPU_CAPS_IRQ_LOCK))
> asm volatile ("cli");
> }.
The "cli" instruction turns off the interrupt enable bit of the hardware.
This is for use by the operating system only. It makes no sense at all
in a user-mode program. The immediate work-around is to replace __cpu_lock
[and presumably __cpu_unlock, also] with an empty function which does nothing:
static inline void __cpu_lock(void)
{
/* empty */
}
If the logic of the application depends on cli and sti, then the logic
is incorrect.
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