mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 08:49:45 +00:00
[AVR32] Implement stacktrace support
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
parent
58bd2bfebd
commit
2f0260371f
3 changed files with 57 additions and 0 deletions
|
@ -24,6 +24,9 @@ config GENERIC_GPIO
|
|||
config GENERIC_HARDIRQS
|
||||
def_bool y
|
||||
|
||||
config STACKTRACE_SUPPORT
|
||||
def_bool y
|
||||
|
||||
config HARDIRQS_SW_RESEND
|
||||
def_bool y
|
||||
|
||||
|
|
|
@ -11,3 +11,4 @@ obj-y += signal.o sys_avr32.o process.o time.o
|
|||
obj-y += init_task.o switch_to.o cpu.o
|
||||
obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o
|
||||
obj-$(CONFIG_KPROBES) += kprobes.o
|
||||
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
||||
|
|
53
arch/avr32/kernel/stacktrace.c
Normal file
53
arch/avr32/kernel/stacktrace.c
Normal file
|
@ -0,0 +1,53 @@
|
|||
/*
|
||||
* Stack trace management functions
|
||||
*
|
||||
* Copyright (C) 2007 Atmel Corporation
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#include <linux/sched.h>
|
||||
#include <linux/stacktrace.h>
|
||||
#include <linux/thread_info.h>
|
||||
|
||||
register unsigned long current_frame_pointer asm("r7");
|
||||
|
||||
struct stackframe {
|
||||
unsigned long lr;
|
||||
unsigned long fp;
|
||||
};
|
||||
|
||||
/*
|
||||
* Save stack-backtrace addresses into a stack_trace buffer.
|
||||
*/
|
||||
void save_stack_trace(struct stack_trace *trace)
|
||||
{
|
||||
unsigned long low, high;
|
||||
unsigned long fp;
|
||||
struct stackframe *frame;
|
||||
int skip = trace->skip;
|
||||
|
||||
low = (unsigned long)task_stack_page(current);
|
||||
high = low + THREAD_SIZE;
|
||||
fp = current_frame_pointer;
|
||||
|
||||
while (fp >= low && fp <= (high - 8)) {
|
||||
frame = (struct stackframe *)fp;
|
||||
|
||||
if (skip) {
|
||||
skip--;
|
||||
} else {
|
||||
trace->entries[trace->nr_entries++] = frame->lr;
|
||||
if (trace->nr_entries >= trace->max_entries)
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* The next frame must be at a higher address than the
|
||||
* current frame.
|
||||
*/
|
||||
low = fp + 8;
|
||||
fp = frame->fp;
|
||||
}
|
||||
}
|
Loading…
Reference in a new issue