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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
void record(uchar*, int);
void usage(void);
void dosegment(long, int);
void trailer(ulong);
enum
{
Recordsize = 32,
};
int dsegonly;
int supressend;
int binary;
int addr4;
ulong addr;
ulong psize = 4096;
ulong startaddr = 0x030000;
Biobuf stdout;
Biobuf bio;
void
main(int argc, char **argv)
{
Dir dir;
Fhdr f;
int fd;
ARGBEGIN{
case 'd':
dsegonly++;
break;
case 's':
supressend++;
break;
case 'a':
addr = strtoul(ARGF(), 0, 0);
break;
case 'p':
psize = strtoul(ARGF(), 0, 0);
break;
case 'b':
binary++;
break;
case 'S':
startaddr = strtoul(ARGF(), 0, 0);
break;
case '4':
addr4++;
break;
default:
usage();
}ARGEND
if(argc != 1)
usage();
Binit(&stdout, 1, OWRITE);
fd = open(argv[0], OREAD);
if(fd < 0) {
fprint(2, "ms2: open %s: %r\n", argv[0]);
exits("open");
}
if(binary) {
if(dirfstat(fd, &dir) < 0) {
fprint(2, "ms2: stat failed %r");
exits("dirfstat");
}
Binit(&bio, fd, OREAD);
dosegment(0, dir.length);
if(supressend == 0)
trailer(startaddr);
Bterm(&stdout);
Bterm(&bio);
exits(0);
}
if(crackhdr(fd, &f) == 0){
fprint(2, "ms2: bad magic: %r\n");
exits("magic");
}
seek(fd, 0, 0);
Binit(&bio, fd, OREAD);
if(dsegonly)
dosegment(f.datoff, f.datsz);
else {
dosegment(f.txtoff, f.txtsz);
addr = (addr+(psize-1))&~(psize-1);
dosegment(f.datoff, f.datsz);
}
if(supressend == 0)
trailer(startaddr);
Bterm(&stdout);
Bterm(&bio);
exits(0);
}
void
dosegment(long foff, int len)
{
int l, n;
uchar buf[2*Recordsize];
Bseek(&bio, foff, 0);
for(;;) {
l = len;
if(l > Recordsize)
l = Recordsize;
n = Bread(&bio, buf, l);
if(n == 0)
break;
if(n < 0) {
fprint(2, "ms2: read error: %r\n");
exits("read");
}
record(buf, l);
len -= l;
}
}
void
record(uchar *s, int l)
{
int i;
ulong cksum;
if(addr4 || addr & (0xFF<<24)){
Bprint(&stdout, "S3%.2X%.8luX", l+5, addr);
cksum = l+5;
cksum += (addr>>24)&0xff;
}else{
Bprint(&stdout, "S2%.2X%.6X", l+4, addr);
cksum = l+4;
}
cksum += addr&0xff;
cksum += (addr>>8)&0xff;
cksum += (addr>>16)&0xff;
for(i = 0; i < l; i++) {
cksum += *s;
Bprint(&stdout, "%.2X", *s++);
}
Bprint(&stdout, "%.2X\n", (~cksum)&0xff);
addr += l;
}
void
trailer(ulong a)
{
ulong cksum;
cksum = 0;
if(addr4 || a & (0xFF<<24)){
Bprint(&stdout, "S7%.8luX", a);
cksum += (a>>24)&0xff;
}else
Bprint(&stdout, "S9%.6X", a);
cksum += a&0xff;
cksum += (a>>8)&0xff;
cksum += (a>>16)&0xff;
Bprint(&stdout, "%.2X\n", (~cksum)&0xff);
}
void
usage(void)
{
fprint(2, "usage: ms2 [-ds] [-a address] [-p pagesize] ?.out\n");
exits("usage");
}
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