[mirror_ubuntu-eoan-kernel.git] / arch / s390 / kernel / stacktrace.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Stack trace management functions
 *
 *  Copyright IBM Corp. 2006
 *  Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
 */

#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/stacktrace.h>
#include <linux/kallsyms.h>
#include <linux/export.h>
#include <asm/stacktrace.h>
#include <asm/unwind.h>

void save_stack_trace(struct stack_trace *trace)
{
	struct unwind_state state;

	unwind_for_each_frame(&state, current, NULL, 0) {
		if (trace->nr_entries >= trace->max_entries)
			break;
		if (trace->skip > 0)
			trace->skip--;
		else
			trace->entries[trace->nr_entries++] = state.ip;
	}
}
EXPORT_SYMBOL_GPL(save_stack_trace);

void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
	struct unwind_state state;

	unwind_for_each_frame(&state, tsk, NULL, 0) {
		if (trace->nr_entries >= trace->max_entries)
			break;
		if (in_sched_functions(state.ip))
			continue;
		if (trace->skip > 0)
			trace->skip--;
		else
			trace->entries[trace->nr_entries++] = state.ip;
	}
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);

void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
{
	struct unwind_state state;

	unwind_for_each_frame(&state, current, regs, 0) {
		if (trace->nr_entries >= trace->max_entries)
			break;
		if (trace->skip > 0)
			trace->skip--;
		else
			trace->entries[trace->nr_entries++] = state.ip;
	}
}
EXPORT_SYMBOL_GPL(save_stack_trace_regs);
Commit	Line	Data
a17ae4c3	1	// SPDX-License-Identifier: GPL-2.0
5bdc9b44	2	/*
5bdc9b44 HC	3	* Stack trace management functions
5bdc9b44 HC	4	*
a53c8fab	5	* Copyright IBM Corp. 2006
5bdc9b44 HC	6	* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
	7	*/
	8
	9	#include <linux/sched.h>
b17b0153	10	#include <linux/sched/debug.h>
5bdc9b44 HC	11	#include <linux/stacktrace.h>
5bdc9b44 HC	12	#include <linux/kallsyms.h>
3994a52b	13	#include <linux/export.h>
78c98f90 MS	14	#include <asm/stacktrace.h>
78c98f90 MS	15	#include <asm/unwind.h>
66adce8f HC	16
	17	void save_stack_trace(struct stack_trace *trace)
	18	{
78c98f90	19	struct unwind_state state;
66adce8f	20
78c98f90 MS	21	unwind_for_each_frame(&state, current, NULL, 0) {
	22	if (trace->nr_entries >= trace->max_entries)
	23	break;
	24	if (trace->skip > 0)
	25	trace->skip--;
	26	else
	27	trace->entries[trace->nr_entries++] = state.ip;
	28	}
a3afe70b	29	}
7b4c9505	30	EXPORT_SYMBOL_GPL(save_stack_trace);
a3afe70b HC	31
	32	void save_stack_trace_tsk(struct task_struct tsk, struct stack_trace trace)
	33	{
78c98f90	34	struct unwind_state state;
a3afe70b	35
78c98f90 MS	36	unwind_for_each_frame(&state, tsk, NULL, 0) {
	37	if (trace->nr_entries >= trace->max_entries)
	38	break;
	39	if (in_sched_functions(state.ip))
	40	continue;
	41	if (trace->skip > 0)
	42	trace->skip--;
	43	else
	44	trace->entries[trace->nr_entries++] = state.ip;
	45	}
5bdc9b44	46	}
7b4c9505	47	EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
e0115875 PA	48
	49	void save_stack_trace_regs(struct pt_regs regs, struct stack_trace trace)
	50	{
78c98f90	51	struct unwind_state state;
e0115875	52
78c98f90 MS	53	unwind_for_each_frame(&state, current, regs, 0) {
	54	if (trace->nr_entries >= trace->max_entries)
	55	break;
	56	if (trace->skip > 0)
	57	trace->skip--;
	58	else
	59	trace->entries[trace->nr_entries++] = state.ip;
	60	}
e0115875 PA	61	}
e0115875 PA	62	EXPORT_SYMBOL_GPL(save_stack_trace_regs);