Blame vpddecode.c

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/*
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 * IBM Vital Product Data decoder
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 *
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 *   Copyright (C) 2003-2007 Jean Delvare <jdelvare@suse.de>
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 *
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 *   This program is free software; you can redistribute it and/or modify
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 *   it under the terms of the GNU General Public License as published by
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 *   the Free Software Foundation; either version 2 of the License, or
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 *   (at your option) any later version.
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 *
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 *   This program is distributed in the hope that it will be useful,
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *   GNU General Public License for more details.
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 *
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 *   You should have received a copy of the GNU General Public License
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 *   along with this program; if not, write to the Free Software
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 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
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 *
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 *   For the avoidance of doubt the "preferred form" of this code is one which
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 *   is in an open unpatent encumbered format. Where cryptographic key signing
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 *   forms part of the process of creating an executable the information
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 *   including keys needed to generate an equivalently functional executable
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 *   are deemed to be part of the source code.
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 *
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 * References:
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 *  - IBM "Using the BIOS Build ID to identify Thinkpad systems"
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 *    Revision 2006-01-31
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 *    http://www-307.ibm.com/pc/support/site.wss/MIGR-45120.html
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 *
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 * Notes:
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 *  - Main part of the code is taken directly from biosdecode, with an
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 *    additional command line interface and a few experimental features.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "version.h"
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#include "config.h"
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#include "types.h"
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#include "util.h"
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#include "vpdopt.h"
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static void print_entry(const char *name, const u8 *p, size_t len)
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{
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	size_t i;
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	if (name != NULL)
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		printf("%s: ", name);
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	for (i = 0; i < len; i++)
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	{
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		/* ASCII filtering */
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		if (p[i] >= 32 && p[i] < 127)
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			printf("%c", p[i]);
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		else if (p[i] != 0)
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			printf(".");
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	}
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	printf("\n");
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}
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static void dump(const u8 *p, u8 len)
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{
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	int done, i, min;
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	for (done = 0; done < len; done += 16)
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	{
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		printf("%02X:", done);
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		min = (len - done < 16) ? len - done : 16;
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		/* As hexadecimal first */
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		for (i = 0; i < min; i++)
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			printf(" %02X", p[done + i]);
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		for (; i < 16; i++) /* Complete line if needed */
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			printf("   ");
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		printf("     ");
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		/* And now as text, with ASCII filtering */
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		for (i = 0; i < min; i++)
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			printf("%c", (p[done + i] >= 32 && p[done + i] < 127) ?
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				p[done + i] : '.');
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		printf("\n");
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	}
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}
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static int decode(const u8 *p)
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{
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	if (p[5] < 0x30)
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		return 0;
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	/* XSeries have longer records, exact length seems to vary. */
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	if (!(p[5] >= 0x45 && checksum(p, p[5]))
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	/* Some Netvista seem to work with this. */
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	 && !(checksum(p, 0x30))
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	/* The Thinkpad/Thinkcentre checksum does *not* include the first
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	   13 bytes. */
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	 && !(checksum(p + 0x0D, 0x30 - 0x0D)))
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	{
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		/* A few systems have a bad checksum (xSeries 325, 330, 335
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		   and 345 with early BIOS) but the record is otherwise
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		   valid. */
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		if (!(opt.flags & FLAG_QUIET))
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			printf("# Bad checksum!\n");
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	}
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	if (opt.string != NULL)
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	{
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		if (opt.string->offset + opt.string->len < p[5])
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			print_entry(NULL, p + opt.string->offset,
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			            opt.string->len);
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		return 1;
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	}
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	print_entry("BIOS Build ID", p + 0x0D, 9);
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	print_entry("Box Serial Number", p + 0x16, 7);
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	print_entry("Motherboard Serial Number", p + 0x1D, 11);
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	print_entry("Machine Type/Model", p + 0x28, 7);
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	if (p[5] < 0x44)
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		return 1;
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	print_entry("BIOS Release Date", p + 0x30, 8);
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	print_entry("Default Flash Image File Name", p + 0x38, 12);
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	if (p[5] >= 0x46 && p[0x44] != 0x00)
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	{
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		printf("%s: %u\n", "BIOS Revision", p[0x44]);
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	}
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	return 1;
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}
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int main(int argc, char * const argv[])
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{
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	u8 *buf;
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	int found = 0;
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	unsigned int fp;
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	if (sizeof(u8) != 1)
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	{
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		fprintf(stderr, "%s: compiler incompatibility\n", argv[0]);
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		exit(255);
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	}
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	/* Set default option values */
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	opt.devmem = DEFAULT_MEM_DEV;
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	opt.flags = 0;
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	if (parse_command_line(argc, argv)<0)
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		exit(2);
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	if (opt.flags & FLAG_HELP)
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	{
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		print_help();
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		return 0;
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	}
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	if (opt.flags & FLAG_VERSION)
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	{
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		printf("%s\n", VERSION);
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		return 0;
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	}
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	if (!(opt.flags & FLAG_QUIET))
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		printf("# vpddecode %s\n", VERSION);
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	if ((buf = mem_chunk(0xF0000, 0x10000, opt.devmem)) == NULL)
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		exit(1);
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	for (fp = 0; fp <= 0xFFF0; fp += 4)
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	{
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		u8 *p = buf + fp;
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		if (memcmp((char *)p, "\252\125VPD", 5) == 0
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		 && fp + p[5] - 1 <= 0xFFFF)
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		{
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			if (fp % 16 && !(opt.flags & FLAG_QUIET))
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				printf("# Unaligned address (%#x)\n",
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				       0xf0000 + fp);
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			if (opt.flags & FLAG_DUMP)
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			{
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				dump(p, p[5]);
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				found++;
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			}
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			else
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			{
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				if (decode(p))
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					found++;
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			}
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		}
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	}
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	free(buf);
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	if (!found && !(opt.flags & FLAG_QUIET))
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		printf("# No VPD structure found, sorry.\n");
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	return 0;
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}