[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sh / kernel / stacktrace.c

/*
 * arch/sh/kernel/stacktrace.c
 *
 * Stack trace management functions
 *
 *  Copyright (C) 2006 - 2008  Paul Mundt
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/thread_info.h>
#include <linux/module.h>
#include <asm/ptrace.h>

/*
 * Save stack-backtrace addresses into a stack_trace buffer.
 */
void save_stack_trace(struct stack_trace *trace)
{
	unsigned long *sp = (unsigned long *)current_stack_pointer;

	while (!kstack_end(sp)) {
		unsigned long addr = *sp++;

		if (__kernel_text_address(addr)) {
			if (trace->skip > 0)
				trace->skip--;
			else
				trace->entries[trace->nr_entries++] = addr;
			if (trace->nr_entries >= trace->max_entries)
				break;
		}
	}
}
EXPORT_SYMBOL_GPL(save_stack_trace);

void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
	unsigned long *sp = (unsigned long *)tsk->thread.sp;

	while (!kstack_end(sp)) {
		unsigned long addr = *sp++;

		if (__kernel_text_address(addr)) {
			if (in_sched_functions(addr))
				break;
			if (trace->skip > 0)
				trace->skip--;
			else
				trace->entries[trace->nr_entries++] = addr;
			if (trace->nr_entries >= trace->max_entries)
				break;
		}
	}
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
Commit	Line	Data
afbfb52e PM	1	/*
	2	* arch/sh/kernel/stacktrace.c
	3	*
	4	* Stack trace management functions
	5	*
5a89f1ad	6	* Copyright (C) 2006 - 2008 Paul Mundt
afbfb52e PM	7	*
	8	* This file is subject to the terms and conditions of the GNU General Public
	9	* License. See the file "COPYING" in the main directory of this archive
	10	* for more details.
	11	*/
	12	#include <linux/sched.h>
	13	#include <linux/stacktrace.h>
	14	#include <linux/thread_info.h>
8b95d917	15	#include <linux/module.h>
afbfb52e PM	16	#include <asm/ptrace.h>
	17
	18	/*
	19	* Save stack-backtrace addresses into a stack_trace buffer.
	20	*/
a3cf4ea8	21	void save_stack_trace(struct stack_trace *trace)
afbfb52e	22	{
ab1b6f03	23	unsigned long sp = (unsigned long )current_stack_pointer;
afbfb52e PM	24
	25	while (!kstack_end(sp)) {
	26	unsigned long addr = *sp++;
	27
	28	if (__kernel_text_address(addr)) {
	29	if (trace->skip > 0)
	30	trace->skip--;
	31	else
	32	trace->entries[trace->nr_entries++] = addr;
	33	if (trace->nr_entries >= trace->max_entries)
	34	break;
	35	}
	36	}
	37	}
7b4c9505	38	EXPORT_SYMBOL_GPL(save_stack_trace);
5a89f1ad PM	39
	40	void save_stack_trace_tsk(struct task_struct tsk, struct stack_trace trace)
	41	{
	42	unsigned long sp = (unsigned long )tsk->thread.sp;
	43
	44	while (!kstack_end(sp)) {
	45	unsigned long addr = *sp++;
	46
	47	if (__kernel_text_address(addr)) {
	48	if (in_sched_functions(addr))
	49	break;
	50	if (trace->skip > 0)
	51	trace->skip--;
	52	else
	53	trace->entries[trace->nr_entries++] = addr;
	54	if (trace->nr_entries >= trace->max_entries)
	55	break;
	56	}
	57	}
	58	}
	59	EXPORT_SYMBOL_GPL(save_stack_trace_tsk);