On Wed, 5 May 2004 12:54:59 -0700,
Haren Myneni <[EMAIL PROTECTED]> wrote:
>regs will be NULL if we use sysrq-trigger to invoke SysRq key. Noticed on
>LKCD, but not sure whether it could apply on KDB.
>Example: echo 'd' > /proc/sysrq-trigger.
IA64 SN2 console had the same problem, not running in the interrupt
handler so no registers. drivers/char/sn_serial.c uses KDB_ENTER() to
get registers.
#ifdef CONFIG_KDB
if (kdb_on) {
if (ch == *kdb_serial_ptr) {
if (!(*++kdb_serial_ptr)) {
spin_unlock_irqrestore(&sn_sal_lock, *flags);
if (!regs)
KDB_ENTER(); /* to get some
registers */
else
kdb(KDB_REASON_KEYBOARD, 0, regs);
kdb_serial_ptr = (char *)kdb_serial_str;
spin_lock_irqsave(&sn_sal_lock, *flags);
break;
}
}
else
kdb_serial_ptr = (char *)kdb_serial_str;
}
#endif /* CONFIG_KDB */
---------------------------
Use http://oss.sgi.com/ecartis to modify your settings or to unsubscribe.
