ref: a920c765f2b4130590fb5971a50690b21664957a
dir: /utils/5coff/readcoff.c/
#include <lib9.h>
#include <bio.h>
#include <mach.h>
int fd;
static void readf(void);
static void
usage(char *msg)
{
fprint(2, "***Error: %s\n", msg);
exits("usage");
}
static int
cget(void)
{
uchar b[1];
if(read(fd, b, 1) != 1){
fprint(2, "bad cget\n");
exits("cget");
}
return b[0];
}
static int
hget(void)
{
uchar b[2];
if(read(fd, b, 2) != 2){
fprint(2, "bad hget\n");
exits("hget");
}
return b[1]<<8 | b[0];
}
static int
lget(void)
{
uchar b[4];
if(read(fd, b, 4) != 4){
fprint(2, "bad lget\n");
exits("lget");
}
return b[3]<<24 | b[2]<<16 | b[1]<<8 | b[0];
}
static char *
sget(char *st)
{
int i;
static uchar buf[8+1];
for(i = 0; i < 8+1; i++)
buf[i] = 0;
if(read(fd, buf, 8) != 8){
fprint(2, "bad sget\n");
exits("sget");
}
if(buf[0] == 0 && buf[1] == 0 && buf[2] == 0 && buf[3] == 0)
return st+(buf[7]<<24|buf[6]<<16|buf[5]<<8|buf[4]);
return (char*)buf;
}
void
main(int argc, char *argv[])
{
if (argc != 2)
usage("Wrong number of arguments");
fd = open(argv[1], OREAD);
if (fd < 0) {
fprint(2, "5coff: open %s: %r\n", argv[1]);
exits("open");
}
readf();
exits(0);
}
static void
section(int i, char *st, int *linoff, int *linn)
{
int pa, va, sz, off, rel, lin, nrel, nlin, f, res, pno;
char *nm;
nm = sget(st);
pa = lget();
va = lget();
sz = lget();
off = lget();
rel = lget();
lin = lget();
nrel = lget();
nlin = lget();
f = lget();
res = hget();
pno = hget();
print("sect %d %s: pa=0x%x va=0x%x sz=%d off=%d rel=%d lin=%d nrel=%d nlin=%d f=0x%x res=%d pno=%d\n", i, nm, pa, va, sz, off, rel, lin, nrel, nlin, f, res, pno);
*linoff = lin;
*linn = nlin;
}
static void
opthdr(void)
{
int mag, ver, textsz, datasz, bsssz, entry, text, data;
mag = hget();
ver = hget();
textsz = lget();
datasz = lget();
bsssz = lget();
entry = lget();
text = lget();
data = lget();
print("opt: mag=0x%x ver=%d txtsz=%d datsz=%d bsssz=%d ent=0x%x txt=0x%x dat=0x%x\n", mag, ver, textsz, datasz, bsssz, entry, text, data);
}
static void
readhdr(int *o, int *ns, int *sy, int *nsy)
{
int vid, nsec, date, sym, nsym, opt, f, tid;
vid = hget();
nsec = hget();
date = lget();
sym = lget();
nsym = lget();
opt = hget();
f = hget();
tid = hget();
print("hdr: vid=0x%x nsect=%d date=%d sym=%d nsym=%d opt=%d f=0x%x tid=0x%x\n", vid, nsec, date, sym, nsym, opt, f, tid);
*o = opt;
*ns = nsec;
*sy = sym;
*nsy = nsym;
}
static void
readauxsect(int i)
{
int sz, nrel, ln;
sz = lget();
nrel = hget();
ln = hget();
lget();
hget();
lget();
print("sym auxsect %d: sz=%d nrel=%d ln=%d\n", i, sz, nrel, ln);
}
static void
readauxfun(int i)
{
int ind, sz, fpln, nind;
ind = lget();
sz = lget();
fpln = lget();
nind = lget();
hget();
print("sym auxfun %d: ind=%d sz=%d fpln=%d nind=%d\n", i, ind, sz, fpln, nind);
}
static void
readauxbf(int i)
{
int rsav, lno, lns, fsz, nind;
rsav = lget();
lno = hget();
lns = hget();
fsz = lget();
nind = lget();
hget();
print("sym auxbf %d: rsav=%x lno=%d lns=%d fsz=%d nind=%d\n", i, rsav, lno, lns, fsz, nind);
}
static void
readauxef(int i)
{
int lno;
lget();
lno = hget();
lget();
lget();
lget();
print("sym auxef %d: lno=%d\n", i, lno);
}
static void
readauxother(int i)
{
lget();
lget();
hget();
lget();
lget();
print("sym auxother %d\n", i);
}
static int
readsym(int i, char *st)
{
int v, s, t, c, aux;
char *nm;
nm = sget(st);
v = lget();
s = hget();
t = hget();
c = cget();
aux = cget();
print("sym %d %s: val=%d sec=%d type=%d class=%d aux=%d\n", i, nm, v, s, t, c, aux);
if(aux){
i++;
if(strcmp(nm, ".text") == 0 || strcmp(nm, ".data") == 0 || strcmp(nm, ".bss") == 0)
readauxsect(i);
else if(strcmp(nm, ".bf") == 0)
readauxbf(i);
else if(strcmp(nm, ".ef") == 0)
readauxef(i);
else if((t&0x30) == 0x20) // will do
readauxfun(i);
else
readauxother(i);
return 1;
}
return 0;
}
static char *
readstr(int n)
{
char *s = malloc(n);
if(read(fd, s+4, n-4) != n-4){
fprint(2, "bad readstr\n");
exits("sget");
}
return s;
}
static void
readln(int i)
{
int a, l;
a = lget();
l = hget();
if(l == 0)
print("line %d: sym=%d\n", i, a);
else
print("line %d: addr=0x%x line=%d\n", i, a, l);
}
static void
readf()
{
int i, opt, nsec, sym, nsym, stoff, strsz, linoff, nlin, lino, linn;
char *st;
seek(fd, 0, 0);
readhdr(&opt, &nsec, &sym, &nsym);
if(opt)
opthdr();
stoff = sym+18*nsym;
seek(fd, stoff, 0);
strsz = lget();
st = readstr(strsz);
linoff = nlin = 0;
seek(fd, 22+28, 0);
for(i = 0; i < nsec; i++){
section(i, st, &lino, &linn);
if(linn != 0){
if(nlin == 0){
nlin = linn;
linoff = lino;
}
else
print("multiple line no. tables\n");
}
}
seek(fd, sym, 0);
for(i = 0; i < nsym; i++)
i += readsym(i, st);
print("strsz = %d\n", strsz);
if(nlin != 0){
seek(fd, linoff, 0);
for(i = 0; i < nlin; i++)
readln(i);
}
}