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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "bootinfo.h"
#include "symbols.h"
static struct systemid sysid = {
.title = "TEST TITLE ",
.maker = "SEGA TP T-000 ",
.product = "T-000000G ",
.version = "V0.001",
.reldate = "20000101",
.device = "CD-1/1 ",
.regions = "JTUBKAEL ",
.peripherals = "J ",
.bootsize = 0xe00,
.stack_master = 0,
.stack_slave = 0,
.load_addr = 0x06004000,
.load_size = 0,
};
static char ipbuf[0x7200];
static char *ipfile, *outfile;
static char *serialize_region_code(char *out, const struct symbolname *region)
{
size_t namelen = strlen(region->name);
char *tmp = out;
char *end = out+32;
memcpy(tmp, "\xa0\x0e\x00\x09For ", 8); tmp += 8;
memcpy(tmp, region->name, namelen); tmp += namelen;
*tmp++ = '.';
memset(tmp, ' ', end - tmp);
return end;
}
#define WRITE(f,p,s) fwrite(p,s,1,f)
#define WRITE32(f,v) fwrite((char[]){(v)>>24,(v)>>16,(v)>>8,(v)},4,1,f)
static int write_output(FILE *fp)
{
static const unsigned char zeros[16];
extern const unsigned char securitycode[];
extern const size_t securitycode_size;
/* system id - 0x100 bytes */
WRITE (fp, "SEGA SEGASATURN ", 16);
WRITE (fp, sysid.maker, 16);
WRITE (fp, sysid.product, 10);
WRITE (fp, sysid.version, 6);
WRITE (fp, sysid.reldate, 8);
WRITE (fp, sysid.device, 8);
WRITE (fp, sysid.regions, 10);
WRITE (fp, " ", 6);
WRITE (fp, sysid.peripherals, 16);
WRITE (fp, sysid.title, 112);
WRITE (fp, zeros, 16); /* reserved bytes */
WRITE32(fp, sysid.bootsize);
WRITE (fp, zeros, 4); /* reserved bytes */
WRITE32(fp, sysid.stack_master);
WRITE32(fp, sysid.stack_slave);
WRITE32(fp, sysid.load_addr);
WRITE32(fp, sysid.load_size);
WRITE (fp, zeros, 8); /* reserved bytes */
/* security code */
WRITE(fp, securitycode, securitycode_size);
/* initial program */
WRITE(fp, ipbuf, sysid.bootsize - 0xe00);
return ferror(fp) ? -1 : 0;
}
static size_t load_ip(char *filename, char *out, size_t maxsize)
{
FILE *fp;
size_t size;
const char *errprefix = "Error loading initial program";
if (!(fp = fopen(filename, "rb"))) {
goto fail_perror;
}
if ((size = fread(out, 1, maxsize, fp)) < maxsize) {
/* read fewer than requested amount. determine if we hit error or eof */
if (ferror(fp)) {
goto fail_perror;
}
} else {
/* successfully read the requested amount. verify we reached eof */
if (fgetc(fp) != EOF) {
fprintf(stderr, "%s: exceeds maximum size\n", errprefix);
goto fail;
}
}
fclose(fp);
return size;
fail_perror:
perror(errprefix);
fail:
if (fp) fclose(fp);
return -1;
}
static void usage(const char *progname)
{
const int width = 20;
fprintf(stderr, "usage: %s -h\n", progname);
fprintf(stderr, " %s -io\n\n", progname);
fprintf(stderr, "\t%-*s%s\n", width, "-h", "Show this help text");
fprintf(stderr, "\t%-*s%s\n", width, "-i ip.bin", "Initial program code file");
fprintf(stderr, "\t%-*s%s\n", width, "-o output", "Output file");
}
static int process_args(int argc, char **argv)
{
int fail = 0, help = 0;
int opt;
extern char *optarg;
extern int optind, optopt;
while ((opt = getopt(argc, argv, ":hi:o:")) != -1) {
switch (opt) {
case 'h':
help = 1;
break;
case 'i':
if (ipfile) {
fprintf(stderr, "Duplicate -i parameter\n");
fail = 1;
}
ipfile = optarg;
break;
case 'o':
if (outfile) {
fprintf(stderr, "Duplicate -o parameter\n");
fail = 1;
}
outfile = optarg;
break;
case ':':
fprintf(stderr, "Option '%c' missing required parameter\n", optopt);
fail = 1;
break;
default:
fprintf(stderr, "Unknown option '%c'\n", opt);
fail = 1;
}
}
if (help) {
usage(argv[0]);
} else {
if (argv[optind]) {
fprintf(stderr, "Unknown extra arguments\n");
fail = 1;
}
if (!ipfile || !outfile) {
fprintf(stderr, "Missing required option\n");
fail = 1;
}
if (fail) {
fprintf(stderr, "Use -h option for help on correct usage.\n");
}
}
return fail | help;
}
int main(int argc, char **argv)
{
FILE *outfp = NULL;
char *ipout = ipbuf;
size_t ipsize;
if (process_args(argc, argv)) {
return 1;
}
for (int i = 0; i < 10 && sysid.regions[i] != ' '; i++) {
const struct symbolname *region = find_symbol(regiondefs, sysid.regions[i]);
if (region) ipout = serialize_region_code(ipout, region);
}
if ((ipsize = load_ip(ipfile, ipout, sizeof ipbuf - (ipout - ipbuf))) == -1) {
goto fail;
}
sysid.bootsize += ipsize;
if (!(outfp = fopen(outfile, "wb"))) {
perror("Error opening output file");
goto fail;
}
if (write_output(outfp)) {
perror("Error writing output");
goto fail;
}
fclose(outfp);
return 0;
fail:
if (outfp) fclose(outfp);
return 1;
}
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