- AVR specific implementation of (linear) symbol table lookup, that uses the

necessary functions to load symbols from flash ROM.
- Implementing binary search is on my TODO list.
This commit is contained in:
barner 2006-12-22 17:12:31 +00:00
parent 54ac97990d
commit c4df71bb7e

81
core/loader/symtab-avr.c Normal file
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@ -0,0 +1,81 @@
/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* 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.
*
* @(#)$Id: symtab-avr.c,v 1.1 2006/12/22 17:12:31 barner Exp $
*/
#include <stdio.h>
#include <string.h>
#include <avr/pgmspace.h>
#include "symtab.h"
#include "loader/symbols-def.h"
#define SYMTAB_CONF_BINARY_SEARCH 0
/*---------------------------------------------------------------------------*/
const char*
symtab_lookup(const char *name)
{
uint16_t i=0;
void* name_addr;
for(name_addr = (void*)pgm_read_word(&symbols[0].name);
name_addr != NULL;
name_addr = (void*)pgm_read_word(&symbols[++i].name)) {
if(strcmp_P (name, (const char*)name_addr) == 0) {
return (void*)pgm_read_word(&symbols[i].value);
}
}
return NULL;
}
/*---------------------------------------------------------------------------*/
#if 0
#define SYMTAB_PRINT_BUFFER_SIZE 30
void
symtab_print (void)
{
uint16_t i=0;
const char* name_addr;
char buf[SYMTAB_PRINT_BUFFER_SIZE];
for(name_addr = (const char*)pgm_read_word(&symbols[0].name);
name_addr != NULL;
name_addr = pgm_read_word(&symbols[++i].name)) {
strncpy_P (buf, (const char*)name_addr, SYMTAB_PRINT_BUFFER_SIZE);
buf [SYMTAB_PRINT_BUFFER_SIZE - 1] = '\0';
uint16_t value = pgm_read_word(&symbols[i].value);
printf ("%s -> 0x%x\n", buf, value);
}
}
#endif