/* * 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);