/arch/ppc64/boot/piggyback.c

 1/*
 2 * Copyright 2001 IBM Corp 
 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
 6 * as published by the Free Software Foundation; either version
 7 * 2 of the License, or (at your option) any later version.
 8 */
 9#include <stdio.h>
10#include <unistd.h>
11#include <string.h>
12
13extern long ce_exec_config[];
14
15int main(int argc, char *argv[])
16{
17	int i, cnt, pos, len;
18	unsigned int cksum, val;
19	unsigned char *lp;
20	unsigned char buf[8192];
21	char *varname;
22	if (argc != 2)
23	{
24		fprintf(stderr, "usage: %s name <in-file >out-file\n",
25			argv[0]);
26		exit(1);
27	}
28
29	varname = strrchr(argv[1], '/');
30	if (varname)
31		varname++;
32	else
33		varname = argv[1];
34
35	fprintf(stdout, "#\n");
36	fprintf(stdout, "# Miscellaneous data structures:\n");
37	fprintf(stdout, "# WARNING - this file is automatically generated!\n");
38	fprintf(stdout, "#\n");
39	fprintf(stdout, "\n");
40	fprintf(stdout, "\t.data\n");
41	fprintf(stdout, "\t.globl %s_data\n", varname);
42	fprintf(stdout, "%s_data:\n", varname);
43	pos = 0;
44	cksum = 0;
45	while ((len = read(0, buf, sizeof(buf))) > 0)
46	{
47		cnt = 0;
48		lp = (unsigned char *)buf;
49		len = (len + 3) & ~3;  /* Round up to longwords */
50		for (i = 0;  i < len;  i += 4)
51		{
52			if (cnt == 0)
53			{
54				fprintf(stdout, "\t.long\t");
55			}
56			fprintf(stdout, "0x%02X%02X%02X%02X", lp[0], lp[1], lp[2], lp[3]);
57			val = *(unsigned long *)lp;
58			cksum ^= val;
59			lp += 4;
60			if (++cnt == 4)
61			{
62				cnt = 0;
63				fprintf(stdout, " # %x \n", pos+i-12);
64				fflush(stdout);
65			} else
66			{
67				fprintf(stdout, ",");
68			}
69		}
70		if (cnt)
71		{
72			fprintf(stdout, "0\n");
73		}
74		pos += len;
75	}
76	fprintf(stdout, "\t.globl %s_len\n", varname);
77	fprintf(stdout, "%s_len:\t.long\t0x%x\n", varname, pos);
78	fflush(stdout);
79	fclose(stdout);
80	fprintf(stderr, "cksum = %x\n", cksum);
81	exit(0);
82}
83