/* * 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);