45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
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/* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8 -*- */
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/************************************************************************************
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** **
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** UHSDR **
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** a powerful firmware for STM32 based SDR transceivers **
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** **
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**---------------------------------------------------------------------------------**
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** **
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** Licence: GNU GPLv3 **
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************************************************************************************/
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#include <malloc.h>
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#include <string.h>
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#include <assert.h>
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#include "uhsdr_canary.h"
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static const uint8_t canary_word[] = { 'D', 'O', ' ', 'G', 'N', 'U', ' ', 'G', 'P', 'L', 'v', '3' };
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uint8_t* canary_word_ptr;
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/**
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* this has to be called after all dynamic memory allocation has happened
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*/
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void Canary_Create( void )
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{
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canary_word_ptr = (uint8_t*)malloc( sizeof( canary_word ));
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assert( canary_word_ptr );
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memcpy ( canary_word_ptr, canary_word, sizeof(canary_word) );
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}
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/**
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* Check if the canary was not destroyed (i.e. no additional allocation has happened and/or some code went wild.
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*
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* this has to be called after all dynamic memory allocation has happened AND Canary_Create has been called
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*
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* @return true if the previously written canary is still found in its location
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*/
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bool Canary_IsIntact( void )
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{
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return memcmp ( canary_word_ptr, canary_word, sizeof(canary_word) ) == 0;
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}
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uint8_t* Canary_GetAddr( void )
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{
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return canary_word_ptr;
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}
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