0d0c927680
loader is screwed and you want loader.old. Rewrite the scaled down printf so it actually works right, and add support for more formats.
727 lines
13 KiB
C
727 lines
13 KiB
C
/*
|
|
* Copyright (c) 1998 Robert Nordier
|
|
* All rights reserved.
|
|
* Copyright (c) 2001 Robert Drehmel
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms are freely
|
|
* permitted provided that the above copyright notice and this
|
|
* paragraph and the following disclaimer are duplicated in all
|
|
* such forms.
|
|
*
|
|
* This software is provided "AS IS" and without any express or
|
|
* implied warranties, including, without limitation, the implied
|
|
* warranties of merchantability and fitness for a particular
|
|
* purpose.
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/diskslice.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/dirent.h>
|
|
#include <machine/elf.h>
|
|
#include <machine/stdarg.h>
|
|
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ufs/dinode.h>
|
|
|
|
#define _PATH_LOADER "/boot/loader"
|
|
#define _PATH_KERNEL "/boot/kernel/kernel"
|
|
|
|
#define BSIZEMAX 8192
|
|
|
|
/*
|
|
* This structure will be refined along with the addition of a bootpath
|
|
* parsing routine when it is necessary to cope with bootpaths that are
|
|
* not in the exact <devpath>@<controller>,<disk>:<partition> format and
|
|
* for which we need to evaluate the disklabel ourselves.
|
|
*/
|
|
struct disk {
|
|
int meta;
|
|
};
|
|
struct disk dsk;
|
|
|
|
static const char digits[] = "0123456789abcdef";
|
|
|
|
static char bootpath[128];
|
|
static char bootargs[128];
|
|
|
|
static int kflag;
|
|
|
|
static uint32_t fs_off;
|
|
|
|
typedef int putc_func_t(int c, void *arg);
|
|
|
|
int main(int ac, char **av);
|
|
|
|
static void exit(int);
|
|
static void load(const char *);
|
|
static ino_t lookup(const char *);
|
|
static ssize_t fsread(ino_t, void *, size_t);
|
|
static int dskread(void *, u_int64_t, int);
|
|
|
|
static void bcopy(const void *src, void *dst, size_t len);
|
|
static void bzero(void *b, size_t len);
|
|
|
|
static int printf(const char *fmt, ...);
|
|
static int vprintf(const char *fmt, va_list ap);
|
|
static int putchar(int c, void *arg);
|
|
|
|
static int __printf(const char *fmt, putc_func_t *putc, void *arg, va_list ap);
|
|
static int __putc(int c, void *arg);
|
|
static int __puts(const char *s, putc_func_t *putc, void *arg);
|
|
static char *__uitoa(char *buf, u_int val, int base);
|
|
static char *__ultoa(char *buf, u_long val, int base);
|
|
|
|
/*
|
|
* Open Firmware interface functions
|
|
*/
|
|
typedef u_int64_t ofwcell_t;
|
|
typedef int32_t ofwh_t;
|
|
typedef u_int32_t u_ofwh_t;
|
|
typedef int (*ofwfp_t)(ofwcell_t []);
|
|
ofwfp_t ofw; /* the prom Open Firmware entry */
|
|
|
|
void ofw_init(int, int, int, int, ofwfp_t);
|
|
ofwh_t ofw_finddevice(const char *);
|
|
ofwh_t ofw_open(const char *);
|
|
int ofw_getprop(ofwh_t, const char *, void *, size_t);
|
|
int ofw_read(ofwh_t, void *, size_t);
|
|
int ofw_write(ofwh_t, const void *, size_t);
|
|
int ofw_seek(ofwh_t, u_int64_t);
|
|
|
|
ofwh_t bootdevh;
|
|
ofwh_t stdinh, stdouth;
|
|
|
|
/*
|
|
* This has to stay here, as the PROM seems to ignore the
|
|
* entry point specified in the a.out header. (or elftoaout is broken)
|
|
*/
|
|
|
|
void
|
|
ofw_init(int d, int d1, int d2, int d3, ofwfp_t ofwaddr)
|
|
{
|
|
ofwh_t chosenh;
|
|
char *av[16];
|
|
char *p;
|
|
int ac;
|
|
|
|
ofw = ofwaddr;
|
|
|
|
chosenh = ofw_finddevice("/chosen");
|
|
ofw_getprop(chosenh, "stdin", &stdinh, sizeof(stdinh));
|
|
ofw_getprop(chosenh, "stdout", &stdouth, sizeof(stdouth));
|
|
ofw_getprop(chosenh, "bootargs", bootargs, sizeof(bootargs));
|
|
ofw_getprop(chosenh, "bootpath", bootpath, sizeof(bootpath));
|
|
|
|
bootargs[sizeof(bootargs) - 1] = '\0';
|
|
bootpath[sizeof(bootpath) - 1] = '\0';
|
|
|
|
if ((bootdevh = ofw_open(bootpath)) == -1) {
|
|
printf("Could not open boot device.\n");
|
|
}
|
|
|
|
ac = 0;
|
|
p = bootargs;
|
|
for (;;) {
|
|
while (*p == ' ' && *p != '\0')
|
|
p++;
|
|
if (*p == '\0' || ac >= 16)
|
|
break;
|
|
av[ac++] = p;
|
|
while (*p != ' ' && *p != '\0')
|
|
p++;
|
|
if (*p != '\0')
|
|
*p++ = '\0';
|
|
}
|
|
|
|
exit(main(ac, av));
|
|
}
|
|
|
|
ofwh_t
|
|
ofw_finddevice(const char *name)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"finddevice",
|
|
1,
|
|
1,
|
|
(ofwcell_t)name,
|
|
0
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_finddevice: name=\"%s\"\n", name);
|
|
return (1);
|
|
}
|
|
return (args[4]);
|
|
}
|
|
|
|
int
|
|
ofw_getprop(ofwh_t ofwh, const char *name, void *buf, size_t len)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"getprop",
|
|
4,
|
|
1,
|
|
(u_ofwh_t)ofwh,
|
|
(ofwcell_t)name,
|
|
(ofwcell_t)buf,
|
|
len,
|
|
0
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_getprop: ofwh=0x%x buf=%p len=%u\n",
|
|
ofwh, buf, len);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
ofwh_t
|
|
ofw_open(const char *path)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"open",
|
|
1,
|
|
1,
|
|
(ofwcell_t)path,
|
|
0
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_open: path=\"%s\"\n", path);
|
|
return (-1);
|
|
}
|
|
return (args[4]);
|
|
}
|
|
|
|
int
|
|
ofw_close(ofwh_t devh)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"close",
|
|
1,
|
|
0,
|
|
(u_ofwh_t)devh
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_close: devh=0x%x\n", devh);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ofw_read(ofwh_t devh, void *buf, size_t len)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"read",
|
|
4,
|
|
1,
|
|
(u_ofwh_t)devh,
|
|
(ofwcell_t)buf,
|
|
len,
|
|
0
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_read: devh=0x%x buf=%p len=%u\n", devh, buf, len);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ofw_write(ofwh_t devh, const void *buf, size_t len)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"write",
|
|
3,
|
|
1,
|
|
(u_ofwh_t)devh,
|
|
(ofwcell_t)buf,
|
|
len,
|
|
0
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_write: devh=0x%x buf=%p len=%u\n", devh, buf, len);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ofw_seek(ofwh_t devh, u_int64_t off)
|
|
{
|
|
ofwcell_t args[] = {
|
|
(ofwcell_t)"seek",
|
|
4,
|
|
1,
|
|
(u_ofwh_t)devh,
|
|
off >> 32,
|
|
off,
|
|
0
|
|
};
|
|
|
|
if ((*ofw)(args)) {
|
|
printf("ofw_seek: devh=0x%x off=0x%lx\n", devh, off);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
ofw_exit(void)
|
|
{
|
|
ofwcell_t args[3];
|
|
|
|
args[0] = (ofwcell_t)"exit";
|
|
args[1] = 0;
|
|
args[2] = 0;
|
|
|
|
(*ofw)(args);
|
|
}
|
|
|
|
static void
|
|
bcopy(const void *dst, void *src, size_t len)
|
|
{
|
|
const char *d = dst;
|
|
char *s = src;
|
|
|
|
while (len-- != 0)
|
|
*s++ = *d++;
|
|
}
|
|
|
|
static void
|
|
bzero(void *b, size_t len)
|
|
{
|
|
char *p = b;
|
|
|
|
while (len-- != 0)
|
|
*p++ = 0;
|
|
}
|
|
|
|
static int
|
|
strcmp(const char *s1, const char *s2)
|
|
{
|
|
for (; *s1 == *s2 && *s1; s1++, s2++)
|
|
;
|
|
return ((u_char)*s1 - (u_char)*s2);
|
|
}
|
|
|
|
static int
|
|
fsfind(const char *name, ino_t * ino)
|
|
{
|
|
char buf[DEV_BSIZE];
|
|
struct dirent *d;
|
|
char *s;
|
|
ssize_t n;
|
|
|
|
fs_off = 0;
|
|
while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0) {
|
|
for (s = buf; s < buf + DEV_BSIZE;) {
|
|
d = (void *)s;
|
|
if (!strcmp(name, d->d_name)) {
|
|
*ino = d->d_fileno;
|
|
return (d->d_type);
|
|
}
|
|
s += d->d_reclen;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
main(int ac, char **av)
|
|
{
|
|
const char *path;
|
|
int i;
|
|
|
|
path = _PATH_LOADER;
|
|
for (i = 0; i < ac; i++) {
|
|
switch (av[i][0]) {
|
|
case '-':
|
|
switch (av[i][1]) {
|
|
case 'k':
|
|
kflag = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
path = av[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
printf(" \n>> FreeBSD/sparc64 boot block\n"
|
|
" Boot path: %s\n"
|
|
" Boot loader: %s\n", bootpath, path);
|
|
load(path);
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
exit(int code)
|
|
{
|
|
|
|
ofw_exit();
|
|
}
|
|
|
|
static void
|
|
load(const char *fname)
|
|
{
|
|
Elf64_Ehdr eh;
|
|
Elf64_Phdr ph;
|
|
caddr_t p;
|
|
ino_t ino;
|
|
int i;
|
|
|
|
if ((ino = lookup(fname)) == 0) {
|
|
printf("File %s not found\n", fname);
|
|
return;
|
|
}
|
|
if (fsread(ino, &eh, sizeof(eh)) != sizeof(eh)) {
|
|
printf("Can't read elf header\n");
|
|
return;
|
|
}
|
|
if (!IS_ELF(eh)) {
|
|
printf("Not an ELF file\n");
|
|
return;
|
|
}
|
|
for (i = 0; i < eh.e_phnum; i++) {
|
|
fs_off = eh.e_phoff + i * eh.e_phentsize;
|
|
if (fsread(ino, &ph, sizeof(ph)) != sizeof(ph)) {
|
|
printf("Can't read program header %d\n", i);
|
|
return;
|
|
}
|
|
if (ph.p_type != PT_LOAD)
|
|
continue;
|
|
fs_off = ph.p_offset;
|
|
p = (caddr_t)ph.p_vaddr;
|
|
if (fsread(ino, p, ph.p_filesz) != ph.p_filesz) {
|
|
printf("Can't read content of section %d\n", i);
|
|
return;
|
|
}
|
|
if (ph.p_filesz != ph.p_memsz)
|
|
bzero(p + ph.p_filesz, ph.p_memsz - ph.p_filesz);
|
|
}
|
|
ofw_close(bootdevh);
|
|
(*(void (*)(int, int, int, int, ofwfp_t))eh.e_entry)(0, 0, 0, 0, ofw);
|
|
}
|
|
|
|
static ino_t
|
|
lookup(const char *path)
|
|
{
|
|
char name[MAXNAMLEN + 1];
|
|
const char *s;
|
|
ino_t ino;
|
|
ssize_t n;
|
|
int dt;
|
|
|
|
ino = ROOTINO;
|
|
dt = DT_DIR;
|
|
name[0] = '/';
|
|
name[1] = '\0';
|
|
for (;;) {
|
|
if (*path == '/')
|
|
path++;
|
|
if (!*path)
|
|
break;
|
|
for (s = path; *s && *s != '/'; s++)
|
|
;
|
|
if ((n = s - path) > MAXNAMLEN)
|
|
return (0);
|
|
bcopy(path, name, n);
|
|
name[n] = 0;
|
|
if (dt != DT_DIR) {
|
|
printf("%s: not a directory.\n", name);
|
|
return (0);
|
|
}
|
|
if ((dt = fsfind(name, &ino)) <= 0)
|
|
break;
|
|
path = s;
|
|
}
|
|
return (dt == DT_REG ? ino : 0);
|
|
}
|
|
|
|
static ssize_t
|
|
fsread(ino_t inode, void *buf, size_t nbyte)
|
|
{
|
|
static struct fs fs;
|
|
static struct dinode din;
|
|
static char blkbuf[BSIZEMAX];
|
|
static ufs_daddr_t indbuf[BSIZEMAX / sizeof(ufs_daddr_t)];
|
|
static ino_t inomap;
|
|
static ufs_daddr_t blkmap, indmap;
|
|
static unsigned int fsblks;
|
|
char *s;
|
|
ufs_daddr_t lbn, addr;
|
|
size_t n, nb, off;
|
|
|
|
if (!dsk.meta) {
|
|
inomap = 0;
|
|
if (dskread(blkbuf, SBOFF / DEV_BSIZE, SBSIZE / DEV_BSIZE))
|
|
return (-1);
|
|
bcopy(blkbuf, &fs, sizeof(fs));
|
|
if (fs.fs_magic != FS_MAGIC) {
|
|
printf("Not ufs\n");
|
|
return (-1);
|
|
}
|
|
fsblks = fs.fs_bsize >> DEV_BSHIFT;
|
|
dsk.meta++;
|
|
}
|
|
if (!inode)
|
|
return (0);
|
|
if (inomap != inode) {
|
|
if (dskread(blkbuf, fsbtodb(&fs, ino_to_fsba(&fs, inode)),
|
|
fsblks))
|
|
return (-1);
|
|
bcopy(blkbuf + ((inode % INOPB(&fs)) * sizeof(din)), &din,
|
|
sizeof(din));
|
|
inomap = inode;
|
|
fs_off = 0;
|
|
blkmap = indmap = 0;
|
|
}
|
|
s = buf;
|
|
if (nbyte > (n = din.di_size - fs_off))
|
|
nbyte = n;
|
|
nb = nbyte;
|
|
while (nb) {
|
|
lbn = lblkno(&fs, fs_off);
|
|
if (lbn < NDADDR)
|
|
addr = din.di_db[lbn];
|
|
else {
|
|
if (indmap != din.di_ib[0]) {
|
|
if (dskread(indbuf, fsbtodb(&fs, din.di_ib[0]),
|
|
fsblks))
|
|
return (-1);
|
|
indmap = din.di_ib[0];
|
|
}
|
|
addr = indbuf[(lbn - NDADDR) % NINDIR(&fs)];
|
|
}
|
|
n = dblksize(&fs, &din, lbn);
|
|
if (blkmap != addr) {
|
|
if (dskread(blkbuf, fsbtodb(&fs, addr),
|
|
n >> DEV_BSHIFT)) {
|
|
return (-1);
|
|
}
|
|
blkmap = addr;
|
|
}
|
|
off = blkoff(&fs, fs_off);
|
|
n -= off;
|
|
if (n > nb)
|
|
n = nb;
|
|
bcopy(blkbuf + off, s, n);
|
|
s += n;
|
|
fs_off += n;
|
|
nb -= n;
|
|
}
|
|
return (nbyte);
|
|
}
|
|
|
|
static int
|
|
dskread(void *buf, u_int64_t lba, int nblk)
|
|
{
|
|
/*
|
|
* The OpenFirmware should open the correct partition for us.
|
|
* That means, if we read from offset zero on an open instance handle,
|
|
* we should read from offset zero of that partition.
|
|
*/
|
|
ofw_seek(bootdevh, lba * DEV_BSIZE);
|
|
ofw_read(bootdevh, buf, nblk * DEV_BSIZE);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
printf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
ret = vprintf(fmt, ap);
|
|
va_end(ap);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
vprintf(const char *fmt, va_list ap)
|
|
{
|
|
int ret;
|
|
|
|
ret = __printf(fmt, putchar, 0, ap);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
putchar(int c, void *arg)
|
|
{
|
|
char buf;
|
|
|
|
if (c == '\n') {
|
|
buf = '\r';
|
|
ofw_write(stdouth, &buf, 1);
|
|
}
|
|
buf = c;
|
|
ofw_write(stdouth, &buf, 1);
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
__printf(const char *fmt, putc_func_t *putc, void *arg, va_list ap)
|
|
{
|
|
char buf[(sizeof(long) * 8) + 1];
|
|
char *nbuf;
|
|
u_long ul;
|
|
u_int ui;
|
|
int lflag;
|
|
int sflag;
|
|
char *s;
|
|
int pad;
|
|
int ret;
|
|
int c;
|
|
|
|
nbuf = &buf[sizeof buf - 1];
|
|
ret = 0;
|
|
while ((c = *fmt++) != 0) {
|
|
if (c != '%') {
|
|
ret += putc(c, arg);
|
|
continue;
|
|
}
|
|
lflag = 0;
|
|
sflag = 0;
|
|
pad = 0;
|
|
reswitch: c = *fmt++;
|
|
switch (c) {
|
|
case '#':
|
|
sflag = 1;
|
|
goto reswitch;
|
|
case '%':
|
|
ret += putc('%', arg);
|
|
break;
|
|
case 'c':
|
|
c = va_arg(ap, int);
|
|
ret += putc(c, arg);
|
|
break;
|
|
case 'd':
|
|
if (lflag == 0) {
|
|
ui = (u_int)va_arg(ap, int);
|
|
if (ui < (int)ui) {
|
|
ui = -ui;
|
|
ret += putc('-', arg);
|
|
}
|
|
s = __uitoa(nbuf, ui, 10);
|
|
} else {
|
|
ul = (u_long)va_arg(ap, long);
|
|
if (ul < (long)ul) {
|
|
ul = -ul;
|
|
ret += putc('-', arg);
|
|
}
|
|
s = __ultoa(nbuf, ul, 10);
|
|
}
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'l':
|
|
lflag = 1;
|
|
goto reswitch;
|
|
case 'o':
|
|
if (lflag == 0) {
|
|
ui = (u_int)va_arg(ap, u_int);
|
|
s = __uitoa(nbuf, ui, 8);
|
|
} else {
|
|
ul = (u_long)va_arg(ap, u_long);
|
|
s = __ultoa(nbuf, ul, 8);
|
|
}
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'p':
|
|
ul = (u_long)va_arg(ap, void *);
|
|
s = __ultoa(nbuf, ul, 16);
|
|
ret += __puts("0x", putc, arg);
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 's':
|
|
s = va_arg(ap, char *);
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'u':
|
|
if (lflag == 0) {
|
|
ui = va_arg(ap, u_int);
|
|
s = __uitoa(nbuf, ui, 10);
|
|
} else {
|
|
ul = va_arg(ap, u_long);
|
|
s = __ultoa(nbuf, ul, 10);
|
|
}
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case 'x':
|
|
if (lflag == 0) {
|
|
ui = va_arg(ap, u_int);
|
|
s = __uitoa(nbuf, ui, 16);
|
|
} else {
|
|
ul = va_arg(ap, u_long);
|
|
s = __ultoa(nbuf, ul, 16);
|
|
}
|
|
if (sflag)
|
|
ret += __puts("0x", putc, arg);
|
|
ret += __puts(s, putc, arg);
|
|
break;
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
pad = pad * 10 + c - '0';
|
|
goto reswitch;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
__puts(const char *s, putc_func_t *putc, void *arg)
|
|
{
|
|
const char *p;
|
|
int ret;
|
|
|
|
ret = 0;
|
|
for (p = s; *p != '\0'; p++)
|
|
ret += putc(*p, arg);
|
|
return (ret);
|
|
}
|
|
|
|
static char *
|
|
__uitoa(char *buf, u_int ui, int base)
|
|
{
|
|
char *p;
|
|
|
|
p = buf;
|
|
*p = '\0';
|
|
do
|
|
*--p = digits[ui % base];
|
|
while ((ui /= base) != 0);
|
|
return (p);
|
|
}
|
|
|
|
static char *
|
|
__ultoa(char *buf, u_long ul, int base)
|
|
{
|
|
char *p;
|
|
|
|
p = buf;
|
|
*p = '\0';
|
|
do
|
|
*--p = digits[ul % base];
|
|
while ((ul /= base) != 0);
|
|
return (p);
|
|
}
|