- 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.

core/loader/symtab-avr.c

@@ -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