I suppose everybody running 2.6 mips kernel see this error message:
> Can't analyze prologue code at XXXXXXXX
XXXXXXXX is an address of schedule_timeout function.
This is because schedule_timeout was moved to timer.c from sched.c and
therefore compiled without -fno-omit-frame-pointer.
If the error is detected, get_wchan does not work so the "ps lw"
command can not print WCHAN field correctly.
How about this patch?
--- arch/mips/kernel/process.c.org Thu Nov 20 16:34:45 2003
+++ arch/mips/kernel/process.c Thu Nov 20 16:38:39 2003
@@ -251,12 +251,20 @@
static int __init frame_info_init(void)
{
- mips_frame_info_initialized =
- !get_frame_info(&schedule_frame, schedule) &&
- !get_frame_info(&schedule_timeout_frame, schedule_timeout) &&
- !get_frame_info(&sleep_on_frame, sleep_on) &&
- !get_frame_info(&sleep_on_timeout_frame, sleep_on_timeout) &&
- !get_frame_info(&wait_for_completion_frame, wait_for_completion);
+ /* in 2.6 kernel, schedule_timout is out of [first_sched,last_sched] */
+ if ((unsigned long)schedule_timeout < first_sched ||
+ (unsigned long)schedule_timeout >= last_sched)
+ mips_frame_info_initialized =
+ !get_frame_info(&schedule_frame, schedule) &&
+ !get_frame_info(&sleep_on_frame, sleep_on) &&
+ !get_frame_info(&wait_for_completion_frame, wait_for_completion);
+ else
+ mips_frame_info_initialized =
+ !get_frame_info(&schedule_frame, schedule) &&
+ !get_frame_info(&schedule_timeout_frame, schedule_timeout) &&
+ !get_frame_info(&sleep_on_frame, sleep_on) &&
+ !get_frame_info(&sleep_on_timeout_frame, sleep_on_timeout) &&
+ !get_frame_info(&wait_for_completion_frame, wait_for_completion);
return 0;
}
@@ -323,6 +331,9 @@
goto out;
schedule_timeout_caller:
+ if ((unsigned long)schedule_timeout < first_sched ||
+ (unsigned long)schedule_timeout >= last_sched)
+ return pc; /* failsafe */
/*
* The schedule_timeout frame
*/
---
Atsushi Nemoto
