src/lib/hexdump.c

   1 /*
   2  * Copyright 2013 Google Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but without any warranty; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <console/console.h>
  16 #include <lib.h>
  17
  18 static int isprint(int c)
  19 {
  20         return (c >= 32 && c <= 126);
  21 }
  22
  23 void hexdump(const void *memory, size_t length)
  24 {
  25         int i;
  26         uint8_t *line;
  27         int all_zero = 0;
  28         int all_one = 0;
  29         size_t num_bytes;
  30
  31         for (i = 0; i < length; i += 16) {
  32                 int j;
  33                 num_bytes = MIN(length - i, 16);
  34                 line = ((uint8_t *)memory) + i;
  35
  36                 all_zero++;
  37                 all_one++;
  38                 for (j = 0; j < num_bytes; j++) {
  39                         if (line[j] != 0) {
  40                                 all_zero = 0;
  41                                 break;
  42                         }
  43                 }
  44
  45                 for (j = 0; j < num_bytes; j++) {
  46                         if (line[j] != 0xff) {
  47                                 all_one = 0;
  48                                 break;
  49                         }
  50                 }
  51
  52                 if ((all_zero < 2) && (all_one < 2)) {
  53                         printk(BIOS_DEBUG, "%p:", memory + i);
  54                         for (j = 0; j < num_bytes; j++)
  55                                 printk(BIOS_DEBUG, " %02x", line[j]);
  56                         for (; j < 16; j++)
  57                                 printk(BIOS_DEBUG, "   ");
  58                         printk(BIOS_DEBUG, "  ");
  59                         for (j = 0; j < num_bytes; j++)
  60                                 printk(BIOS_DEBUG, "%c",
  61                                        isprint(line[j]) ? line[j] : '.');
  62                         printk(BIOS_DEBUG, "\n");
  63                 } else if ((all_zero == 2) || (all_one == 2)) {
  64                         printk(BIOS_DEBUG, "...\n");
  65                 }
  66         }
  67 }
  68
  69 void hexdump32(char LEVEL, const void *d, size_t len)
  70 {
  71         int count = 0;
  72
  73         while (len > 0) {
  74                 if (count % 8 == 0) {
  75                         printk(LEVEL, "\n");
  76                         printk(LEVEL, "%p:", d);
  77                 }
  78                 printk(LEVEL, " 0x%08lx", *(unsigned long *)d);
  79                 count++;
  80                 len--;
  81                 d += 4;
  82         }
  83
  84         printk(LEVEL, "\n\n");
  85 }