mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-07 02:05:33 +00:00
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2011, George Oikonomou - <oikonomou@users.sourceforge.net>
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* This file is part of the Contiki operating system.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \file
|
||
|
|
* 8051 stack debugging facilities
|
||
|
|
*
|
||
|
|
* \author
|
||
|
|
* George Oikonomou - <oikonomou@users.sourceforge.net>
|
||
|
|
* Philippe Retornaz (EPFL)
|
||
|
|
*/
|
||
|
|
#include "contiki.h"
|
||
|
|
|
||
|
|
#ifndef STACK_POISON
|
||
|
|
#define STACK_POISON 0xAA
|
||
|
|
#endif
|
||
|
|
|
||
|
|
CC_AT_DATA uint8_t sp;
|
||
|
|
|
||
|
|
void
|
||
|
|
stack_poison(void)
|
||
|
|
{
|
||
|
|
__asm
|
||
|
|
mov r1, _SP
|
||
|
|
poison_loop:
|
||
|
|
inc r1
|
||
|
|
mov @r1, #STACK_POISON
|
||
|
|
cjne r1, #0xFF, poison_loop
|
||
|
|
__endasm;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t
|
||
|
|
stack_get_max(void)
|
||
|
|
{
|
||
|
|
__data uint8_t * sp = (__data uint8_t *) 0xff;
|
||
|
|
uint8_t free = 0;
|
||
|
|
|
||
|
|
while(*sp-- == STACK_POISON) {
|
||
|
|
free++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0xff - free;
|
||
|
|
}
|