Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

This is a host program. Don't use errx.

This commit is contained in:
christos 2003-05-08 13:42:17 +00:00
parent be31135d4c
commit 9dbe78f136
1 changed files with 31 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
sys/arch/i386/stand/genprom/genprom.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: genprom.c,v 1.4 2002/07/20 08:36:18 grant Exp $ */
/* $NetBSD: genprom.c,v 1.5 2003/05/08 13:42:17 christos Exp $ */
/*
* mainly from netbsd:sys/arch/i386/netboot/genprom.c
@ -13,37 +13,51 @@
*/
#include <stdio.h>
#include <err.h>
#include <string.h>
#define PROM_SIZE 0x10000 /* max */
static char *progname;
static void bail(const char *)
__attribute__((__noreturn__));
int main(int, char **);
static void
bail(const char *msg)
{
(void)fprintf(stderr, "%s: %s\n", progname, msg);
exit(1);
}
int
main(argc, argv)
int argc;
char **argv;
main(int argc, char **argv)
{
char w[PROM_SIZE];
int i, sum;
int romsize;
unsigned short ck16;
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
if (argc > 1) {
if (sscanf(argv[1], "%d", &romsize) != 1) {
errx(1, "bad arg");
}
if (sscanf(argv[1], "%d", &romsize) != 1)
bail("bad arg");
} else {
errx(1, "arg: romsize / bytes");
bail("arg: romsize / bytes");
}
memset(w, 0x0, PROM_SIZE);
(void)memset(w, 0x0, PROM_SIZE);
i = fread(w, 1, PROM_SIZE, stdin);
fprintf(stderr, "bios extension size: %d (0x%x), read %d bytes\n",
romsize, romsize, i);
(void)fprintf(stderr, "bios extension size: %d (0x%x), read %d bytes\n",
romsize, romsize, i);
if (i > romsize)
errx(1, "read longer than expected");
bail("read longer than expected");
w[2] = romsize / 512; /* BIOS extension size */
@ -54,16 +68,16 @@ main(argc, argv)
fprintf(stderr, "PCI Data Structure found\n");
w[i + 0x10] = romsize / 512; /* BIOS extension size again */
}
for (sum = 0, i = 0; i < romsize; i++) {
for (sum = 0, i = 0; i < romsize; i++)
sum += w[i];
}
w[5] = -sum; /* left free for checksum adjustment */
/* calculate CRC as used by PROM programmers */
for (ck16 = 0, i = 0; i < romsize; i++)
ck16 += (unsigned char) w[i];
fprintf(stderr, "ROM CRC: 0x%04x\n", ck16);
(void)fprintf(stderr, "ROM CRC: 0x%04x\n", ck16);
fwrite(w, 1, romsize, stdout);
(void)fwrite(w, 1, romsize, stdout);
return (0);
}