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/*
* Stack trace support for Microblaze.
*
* Copyright (C) 2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2009 PetaLogix
*
* 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/ptrace.h>
#include <linux/module.h>
/* FIXME initial support */
void save_stack_trace(struct stack_trace *trace)
{
unsigned long *sp;
unsigned long addr;
asm("addik %0, r1, 0" : "=r" (sp));
while (!kstack_end(sp)) {
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 int *sp;
unsigned long addr;
struct thread_info *ti = task_thread_info(tsk);
if (tsk == current)
asm("addik %0, r1, 0" : "=r" (sp));
else
sp = (unsigned int *)ti->cpu_context.r1;
while (!kstack_end(sp)) {
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_tsk);
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