I was scanning through the source and noticed the lines below.
Should the code below, be reloading at least the local bits of
DR7 if the current DR7 value != 0? From a quick glance, it
looks like only if the next task's DR7 value is non-zero,
that DR7 is reloaded. I'm wondering if this would leave
a new task to receive "local" debug events for the previous
task if prev->DR7!=0 && next->DR7==0.
-Kevin
linux-2.5.59: arch/i386/kernel/process.c: line 462+:
/*
* Now maybe reload the debug registers
*/
if (unlikely(next->debugreg[7])) {
loaddebug(next, 0);
loaddebug(next, 1);
loaddebug(next, 2);
loaddebug(next, 3);
/* no 4 and 5 */
loaddebug(next, 6);
loaddebug(next, 7);
}
__________________________________________________
Do you Yahoo!?
New DSL Internet Access from SBC & Yahoo!
http://sbc.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Feb 07 2003 - 22:00:13 EST