static void do_ia64_backtrace(struct unw_frame_info *info, void *vdata)
{
ia64_backtrace_t *bt = vdata;
struct switch_stack *sw;
int count = 0;
u_long pc, sp;
sw = (struct switch_stack *)(info+1);
/* */
sw = (struct switch_stack *)(((unsigned long)sw + 15) & ~15);
unw_init_frame_info(&bt->frame, current, sw);
/* */
do {
unw_get_sp(&bt->frame, &sp);
if (sp >= (u_long)bt->regs)
break;
if (!next_frame(bt))
return;
} while (count++ < 200);
/* */
while (bt->depth-- && next_frame(bt)) {
unw_get_ip(&bt->frame, &pc);
oprofile_add_trace(pc);
if (unw_is_intr_frame(&bt->frame)) {
/*
*/
/* */
break;
}
}
}
static void do_ia64_backtrace(struct unw_frame_info *info, void *vdata)
{
ia64_backtrace_t *bt = vdata;
struct switch_stack *sw;
int count = 0;
u_long pc, sp;
sw = (struct switch_stack *)(info+1);
/* padding from unw_init_running */
sw = (struct switch_stack *)(((unsigned long)sw + 15) & ~15);
unw_init_frame_info(&bt->frame, current, sw);
/* skip over interrupt frame and oprofile calls */
do {
unw_get_sp(&bt->frame, &sp);
if (sp >= (u_long)bt->regs)
break;
if (!next_frame(bt))
return;
} while (count++ < 200);
/* finally, grab the actual sample */
while (bt->depth-- && next_frame(bt)) {
unw_get_ip(&bt->frame, &pc);
oprofile_add_trace(pc);
if (unw_is_intr_frame(&bt->frame)) {
/*
* Interrupt received on kernel stack; this can
* happen when timer interrupt fires while processing
* a softirq from the tail end of a hardware interrupt
* which interrupted a system call. Don't laugh, it
* happens! Splice the backtrace into two parts to
* avoid spurious cycles in the gprof output.
*/
/* TODO: split rather than drop the 2nd half */
break;
}
}
}
