44 lines
977 B
C
44 lines
977 B
C
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/*
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* arch/sh/kernel/stacktrace.c
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*
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* Stack trace management functions
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*
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* Copyright (C) 2006 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/sched.h>
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#include <linux/stacktrace.h>
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#include <linux/thread_info.h>
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#include <asm/ptrace.h>
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/*
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* Save stack-backtrace addresses into a stack_trace buffer.
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*/
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void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
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{
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unsigned long *sp;
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if (!task)
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task = current;
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if (task == current)
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sp = (unsigned long *)current_stack_pointer;
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else
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sp = (unsigned long *)task->thread.sp;
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while (!kstack_end(sp)) {
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unsigned long addr = *sp++;
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if (__kernel_text_address(addr)) {
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if (trace->skip > 0)
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trace->skip--;
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else
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trace->entries[trace->nr_entries++] = addr;
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if (trace->nr_entries >= trace->max_entries)
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break;
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}
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}
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}
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