src/base/loader/hex_file.cc

   1 /*
   2  * Copyright (c) 2007 MIPS Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Jaidev Patwardhan
  29  */
  30
  31 #include <cctype>
  32 #include <cstdio>
  33 #include <list>
  34 #include <string>
  35
  36 #include "base/loader/hex_file.hh"
  37 #include "base/loader/symtab.hh"
  38 #include "base/cprintf.hh"
  39 #include "mem/port_proxy.hh"
  40
  41 using namespace std;
  42 /*
  43  * Load a Hex File into memory. Currently only used with MIPS
  44  * BARE_IRON mode. A hex file consists of [Address Data] tuples that
  45  * get directly loaded into physical memory. The address specified is
  46  * a word address (i.e., to get the byte address, shift left by 2) The
  47  * data is a full 32-bit hex value.
  48 */
  49 HexFile::HexFile(const string _filename)
  50     : filename(_filename)
  51 {
  52     fp = fopen(filename.c_str(), "r");
  53     if (fp == NULL)
  54         panic("Unable to open %s\n", filename.c_str());
  55 }
  56
  57 HexFile::~HexFile()
  58 {
  59     if (fp != NULL)
  60         fclose(fp);
  61 }
  62
  63 bool
  64 HexFile::loadSections(PortProxy& memProxy)
  65 {
  66     char Line[64];
  67     Addr MemAddr;
  68     uint32_t Data;
  69     while (!feof(fp)) {
  70         char *ret = fgets(Line, sizeof(Line), fp);
  71         if (!ret)
  72             panic("malformed file");
  73         parseLine(Line, &MemAddr, &Data);
  74         if (MemAddr != 0) {
  75             // Now, write to memory
  76             memProxy.writeBlob(MemAddr << 2, (uint8_t *)&Data, sizeof(Data));
  77         }
  78     }
  79     return true;
  80 }
  81
  82 void
  83 HexFile::parseLine(char *Str, Addr *A, uint32_t *D)
  84 {
  85     int i = 0;
  86     bool Flag = false;
  87     *A = 0;
  88     *D = 0;
  89     int Digit = 0;
  90     unsigned Number = 0;
  91
  92     /* Skip white spaces */
  93     while (Str[i] != '\0' && Str[i]==' ')
  94         i++;
  95
  96     /* Ok, we're at some character...process things */
  97     while (Str[i] != '\0') {
  98         if (Str[i] >= '0' && Str[i] <= '9') {
  99             Digit = Str[i] - '0';
 100         } else if (Str[i] >= 'a' && Str[i] <= 'f') {
 101             Digit = Str[i] - 'a' + 10;
 102         } else if (Str[i] >= 'A' && Str[i] <= 'F') {
 103           Digit=Str[i]-'A'+10;
 104         } else if (Str[i] == ' ' || Str[i] == '\n') {
 105             if (Number == 0)
 106                 return;
 107             if (Flag == false) {
 108                 *A = Number;
 109                 Number = 0;
 110                 Flag = true;
 111             } else {
 112                 *D = Number;
 113                 return;
 114             }
 115         } else {
 116             // Ok, we've encountered a non-hex character, cannot be a
 117             // valid line, skip and return 0's
 118             *A = 0;
 119             *D = 0;
 120             return;
 121         }
 122
 123         Number <<= 4;
 124         Number += Digit;
 125         i++;
 126     }
 127
 128     if (Flag != true) {
 129         *A = 0;
 130         *D = 0;
 131     } else {
 132         *D = Number;
 133     }
 134 }
 135
 136 void
 137 HexFile::close()
 138 {
 139     fclose(fp);
 140 }