1/*
 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
 3 * Copyright (C) 2007-2009 PetaLogix
 4 * Copyright (C) 2006 Atmark Techno, Inc.
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License. See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
10
 
11#include <linux/export.h>
12#include <linux/kernel.h>
13#include <linux/kallsyms.h>
14#include <linux/sched.h>
15#include <linux/sched/debug.h>
16#include <linux/debug_locks.h>
17
18#include <asm/exceptions.h>
19#include <asm/unwind.h>
20
21void trap_init(void)
22{
23	__enable_hw_exceptions();
24}
25
26static unsigned long kstack_depth_to_print;	/* 0 == entire stack */
27
28static int __init kstack_setup(char *s)
29{
30	return !kstrtoul(s, 0, &kstack_depth_to_print);
31}
32__setup("kstack=", kstack_setup);
33
34void show_stack(struct task_struct *task, unsigned long *sp)
35{
36	unsigned long words_to_show;
37	u32 fp = (u32) sp;
38
39	if (fp == 0) {
40		if (task) {
41			fp = ((struct thread_info *)
42				(task->stack))->cpu_context.r1;
43		} else {
44			/* Pick up caller of dump_stack() */
45			fp = (u32)&sp - 8;
46		}
47	}
48
49	words_to_show = (THREAD_SIZE - (fp & (THREAD_SIZE - 1))) >> 2;
50	if (kstack_depth_to_print && (words_to_show > kstack_depth_to_print))
51		words_to_show = kstack_depth_to_print;
52
53	pr_info("Kernel Stack:\n");
54
55	/*
56	 * Make the first line an 'odd' size if necessary to get
57	 * remaining lines to start at an address multiple of 0x10
58	 */
59	if (fp & 0xF) {
60		unsigned long line1_words = (0x10 - (fp & 0xF)) >> 2;
61		if (line1_words < words_to_show) {
62			print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32,
63				       4, (void *)fp, line1_words << 2, 0);
64			fp += line1_words << 2;
65			words_to_show -= line1_words;
66		}
67	}
68	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32, 4, (void *)fp,
69		       words_to_show << 2, 0);
70	pr_info("\n\nCall Trace:\n");
71	microblaze_unwind(task, NULL);
72	pr_info("\n");
73
74	if (!task)
75		task = current;
76
77	debug_show_held_locks(task);
78}

 1/*
 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
 3 * Copyright (C) 2007-2009 PetaLogix
 4 * Copyright (C) 2006 Atmark Techno, Inc.
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License. See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
10
11#include <linux/cpu.h>
12#include <linux/export.h>
13#include <linux/kernel.h>
14#include <linux/kallsyms.h>
15#include <linux/sched.h>
16#include <linux/sched/debug.h>
17#include <linux/debug_locks.h>
18
19#include <asm/exceptions.h>
20#include <asm/unwind.h>
21
22void trap_init(void)
23{
24	__enable_hw_exceptions();
25}
26
27static unsigned long kstack_depth_to_print;	/* 0 == entire stack */
28
29static int __init kstack_setup(char *s)
30{
31	return !kstrtoul(s, 0, &kstack_depth_to_print);
32}
33__setup("kstack=", kstack_setup);
34
35void show_stack(struct task_struct *task, unsigned long *sp, const char *loglvl)
36{
37	unsigned long words_to_show;
38	u32 fp = (u32) sp;
39
40	if (fp == 0) {
41		if (task) {
42			fp = ((struct thread_info *)
43				(task->stack))->cpu_context.r1;
44		} else {
45			/* Pick up caller of dump_stack() */
46			fp = (u32)&sp - 8;
47		}
48	}
49
50	words_to_show = (THREAD_SIZE - (fp & (THREAD_SIZE - 1))) >> 2;
51	if (kstack_depth_to_print && (words_to_show > kstack_depth_to_print))
52		words_to_show = kstack_depth_to_print;
53
54	printk("%sKernel Stack:\n", loglvl);
55
56	/*
57	 * Make the first line an 'odd' size if necessary to get
58	 * remaining lines to start at an address multiple of 0x10
59	 */
60	if (fp & 0xF) {
61		unsigned long line1_words = (0x10 - (fp & 0xF)) >> 2;
62		if (line1_words < words_to_show) {
63			print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32,
64				       4, (void *)fp, line1_words << 2, 0);
65			fp += line1_words << 2;
66			words_to_show -= line1_words;
67		}
68	}
69	print_hex_dump(loglvl, "", DUMP_PREFIX_ADDRESS, 32, 4, (void *)fp,
70		       words_to_show << 2, 0);
71	printk("%s\n\nCall Trace:\n", loglvl);
72	microblaze_unwind(task, NULL, loglvl);
73	printk("%s\n", loglvl);
74
75	if (!task)
76		task = current;
77
78	debug_show_held_locks(task);
79}