void
ecoff_loadkernel(char *file)
{
int fd;
off_t beg, cur, end;
if ((fd = open(file, O_RDONLY | O_EXLOCK, 0)) < 0)
err(1, "%s", file);
if (read(fd, (char *)&ecoff_ex, sizeof(ecoff_ex)) != sizeof(ecoff_ex))
errx(1, "can't read ecoff header");
if (ECOFF_BADMAG(&ecoff_ex))
errx(1, "bad ecoff magic");
ecoff_psz = ecoff_ex.a.tsize + ecoff_ex.a.dsize;
beg = lseek(fd, ECOFF_TXTOFF(&ecoff_ex), SEEK_SET);
ecoff_bsz = (int)beg;
ecoff_b = emalloc(ecoff_bsz);
ecoff_p = emalloc(ecoff_psz);
if (read(fd, ecoff_p, ecoff_psz) != ecoff_psz)
errx(1, "can't read ecoff text and data");
cur = lseek(fd, (off_t)0, SEEK_CUR);
end = lseek(fd, (off_t)0, SEEK_END);
(void)lseek(fd, (off_t)0, SEEK_SET);
if (read(fd, ecoff_b, ecoff_bsz) != ecoff_bsz)
errx(1, "can't read begining of file %s", file);
(void)lseek(fd, cur, SEEK_SET);
ecoff_rsz = (int)(end - cur);
ecoff_r = emalloc(ecoff_rsz);
if (read(fd, ecoff_r, ecoff_rsz) != ecoff_rsz)
errx(1, "can't read rest of file %s", file);
close(fd);
}
int
findoff_ecoff(const char *mappedfile, size_t mappedsize, u_long vmaddr,
size_t *fileoffp, u_long text_address)
{
const struct ecoff_exechdr *exechdrp;
int rv;
rv = 0;
exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];
if (exechdrp->a.text_start <= vmaddr &&
vmaddr < (exechdrp->a.text_start + exechdrp->a.tsize))
*fileoffp = vmaddr - exechdrp->a.text_start +
ECOFF_TXTOFF(exechdrp);
else if (exechdrp->a.data_start <= vmaddr &&
vmaddr < (exechdrp->a.data_start + exechdrp->a.dsize))
*fileoffp = vmaddr - exechdrp->a.data_start +
ECOFF_DATOFF(exechdrp);
else
BAD;
out:
return (rv);
}
static int
coff_exec(int fd, struct ecoff_exechdr *coff, u_long *marks, int flags)
{
paddr_t offset = marks[MARK_START];
paddr_t minp = ~0, maxp = 0, pos;
/* Read in text. */
if (lseek(fd, ECOFF_TXTOFF(coff), SEEK_SET) == -1) {
WARN(("lseek text"));
return 1;
}
if (coff->a.tsize != 0) {
if (flags & LOAD_TEXT) {
PROGRESS(("%lu", coff->a.tsize));
if (READ(fd, coff->a.text_start, coff->a.tsize) !=
coff->a.tsize) {
return 1;
}
}
else {
if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) {
WARN(("read text"));
return 1;
}
}
if (flags & (COUNT_TEXT|LOAD_TEXT)) {
pos = coff->a.text_start;
if (minp > pos)
minp = pos;
pos += coff->a.tsize;
if (maxp < pos)
maxp = pos;
}
}
/* Read in data. */
if (coff->a.dsize != 0) {
if (flags & LOAD_DATA) {
PROGRESS(("+%lu", coff->a.dsize));
if (READ(fd, coff->a.data_start, coff->a.dsize) !=
coff->a.dsize) {
WARN(("read data"));
return 1;
}
}
if (flags & (COUNT_DATA|LOAD_DATA)) {
pos = coff->a.data_start;
if (minp > pos)
minp = pos;
pos += coff->a.dsize;
if (maxp < pos)
maxp = pos;
}
}
/* Zero out bss. */
if (coff->a.bsize != 0) {
if (flags & LOAD_BSS) {
PROGRESS(("+%lu", coff->a.bsize));
BZERO(coff->a.bss_start, coff->a.bsize);
}
if (flags & (COUNT_BSS|LOAD_BSS)) {
pos = coff->a.bss_start;
if (minp > pos)
minp = pos;
pos = coff->a.bsize;
if (maxp < pos)
maxp = pos;
}
}
marks[MARK_START] = LOADADDR(minp);
marks[MARK_ENTRY] = LOADADDR(coff->a.entry);
marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */
marks[MARK_SYM] = LOADADDR(maxp);
marks[MARK_END] = LOADADDR(maxp);
return 0;
}
