linux/arch/ppc64/boot/piggyback.c

84 lines
1.8 KiB
C

/*
* Copyright 2001 IBM Corp
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
extern long ce_exec_config[];
int main(int argc, char *argv[])
{
int i, cnt, pos, len;
unsigned int cksum, val;
unsigned char *lp;
unsigned char buf[8192];
char *varname;
if (argc != 2)
{
fprintf(stderr, "usage: %s name <in-file >out-file\n",
argv[0]);
exit(1);
}
varname = strrchr(argv[1], '/');
if (varname)
varname++;
else
varname = argv[1];
fprintf(stdout, "#\n");
fprintf(stdout, "# Miscellaneous data structures:\n");
fprintf(stdout, "# WARNING - this file is automatically generated!\n");
fprintf(stdout, "#\n");
fprintf(stdout, "\n");
fprintf(stdout, "\t.data\n");
fprintf(stdout, "\t.globl %s_data\n", varname);
fprintf(stdout, "%s_data:\n", varname);
pos = 0;
cksum = 0;
while ((len = read(0, buf, sizeof(buf))) > 0)
{
cnt = 0;
lp = (unsigned char *)buf;
len = (len + 3) & ~3; /* Round up to longwords */
for (i = 0; i < len; i += 4)
{
if (cnt == 0)
{
fprintf(stdout, "\t.long\t");
}
fprintf(stdout, "0x%02X%02X%02X%02X", lp[0], lp[1], lp[2], lp[3]);
val = *(unsigned long *)lp;
cksum ^= val;
lp += 4;
if (++cnt == 4)
{
cnt = 0;
fprintf(stdout, " # %x \n", pos+i-12);
fflush(stdout);
} else
{
fprintf(stdout, ",");
}
}
if (cnt)
{
fprintf(stdout, "0\n");
}
pos += len;
}
fprintf(stdout, "\t.globl %s_len\n", varname);
fprintf(stdout, "%s_len:\t.long\t0x%x\n", varname, pos);
fflush(stdout);
fclose(stdout);
fprintf(stderr, "cksum = %x\n", cksum);
exit(0);
}