72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
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/*
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* Copyright (c) 2011, George Oikonomou - <oikonomou@users.sourceforge.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* 8051 stack debugging facilities
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*
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* \author
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* George Oikonomou - <oikonomou@users.sourceforge.net>
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* Philippe Retornaz (EPFL)
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*/
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#include "contiki.h"
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#ifndef STACK_POISON
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#define STACK_POISON 0xAA
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#endif
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CC_AT_DATA uint8_t sp;
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void
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stack_poison(void)
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{
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__asm
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mov r1, _SP
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poison_loop:
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inc r1
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mov @r1, #STACK_POISON
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cjne r1, #0xFF, poison_loop
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__endasm;
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}
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uint8_t
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stack_get_max(void)
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{
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__data uint8_t * sp = (__data uint8_t *) 0xff;
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uint8_t free = 0;
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while(*sp-- == STACK_POISON) {
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free++;
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}
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return 0xff - free;
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}
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