577 lines
11 KiB
C
577 lines
11 KiB
C
/*
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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* Copyright (c) 2001 Robert Drehmel
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include <sys/diskslice.h>
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#include <sys/disklabel.h>
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#include <sys/dirent.h>
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#include <machine/elf.h>
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#include <machine/stdarg.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/dinode.h>
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#define _PATH_LOADER "/boot/loader"
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#define _PATH_KERNEL "/boot/kernel/kernel"
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#define BSIZEMAX 8192
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/*
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* This structure will be refined along with the addition of a bootpath
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* parsing routine when it is necessary to cope with bootpaths that are
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* not in the exact <devpath>@<controller>,<disk>:<partition> format and
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* for which we need to evaluate the disklabel ourselves.
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*/
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struct disk {
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int meta;
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};
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struct disk dsk;
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extern uint32_t _end;
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static char bname[1024]; /* name of the binary to load */
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static uint32_t fs_off;
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int main(void);
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void exit(int);
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static void load(const char *);
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static ino_t lookup(const char *);
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static ssize_t fsread(ino_t, void *, size_t);
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static int dskread(void *, u_int64_t, int);
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static int printf(const char *, ...);
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static int putchar(int);
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static void *memcpy(void *, const void *, size_t);
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static void *memset(void *, int, size_t);
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/*
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* Open Firmware interface functions
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*/
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typedef u_int64_t ofwcell_t;
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typedef int32_t ofwh_t;
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typedef u_int32_t u_ofwh_t;
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typedef int (*ofwfp_t)(ofwcell_t []);
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ofwfp_t ofw; /* the prom Open Firmware entry */
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void ofw_init(int, int, int, int, ofwfp_t);
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ofwh_t ofw_finddevice(const char *);
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ofwh_t ofw_open(const char *);
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int ofw_getprop(ofwh_t, const char *, void *, size_t);
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int ofw_read(ofwh_t, void *, size_t);
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int ofw_write(ofwh_t, const void *, size_t);
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int ofw_seek(ofwh_t, u_int64_t);
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ofwh_t bootdevh;
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ofwh_t stdinh, stdouth;
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char bootpath[64];
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/*
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* This has to stay here, as the PROM seems to ignore the
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* entry point specified in the a.out header. (or elftoaout is broken)
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*/
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void
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ofw_init(int d, int d1, int d2, int d3, ofwfp_t ofwaddr)
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{
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ofwh_t chosenh;
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ofw = ofwaddr;
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chosenh = ofw_finddevice("/chosen");
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ofw_getprop(chosenh, "stdin", &stdinh, sizeof(stdinh));
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ofw_getprop(chosenh, "stdout", &stdouth, sizeof(stdouth));
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ofw_getprop(chosenh, "bootpath", bootpath, sizeof(bootpath));
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if ((bootdevh = ofw_open(bootpath)) == -1) {
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printf("Could not open boot device.\n");
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}
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main();
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d = d1 = d2 = d3; /* make GCC happy */
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}
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ofwh_t
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ofw_finddevice(const char *name)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"finddevice",
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1,
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1,
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(ofwcell_t)name,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_finddevice: name=\"%s\"\n", name);
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return (1);
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}
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return (args[4]);
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}
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int
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ofw_getprop(ofwh_t ofwh, const char *name, void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"getprop",
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4,
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1,
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(u_ofwh_t)ofwh,
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(ofwcell_t)name,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_getprop: ofwh=0x%x buf=%p len=%u\n",
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ofwh, buf, len);
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return (1);
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}
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return (0);
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}
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ofwh_t
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ofw_open(const char *path)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"open",
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1,
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1,
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(ofwcell_t)path,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_open: path=\"%s\"\n", path);
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return (-1);
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}
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return (args[4]);
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}
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int
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ofw_close(ofwh_t devh)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"close",
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1,
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0,
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(u_ofwh_t)devh
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};
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if ((*ofw)(args)) {
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printf("ofw_close: devh=0x%x\n", devh);
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return (1);
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}
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return (0);
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}
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int
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ofw_read(ofwh_t devh, void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"read",
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4,
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1,
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(u_ofwh_t)devh,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_read: devh=0x%x buf=%p len=%u\n", devh, buf, len);
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return (1);
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}
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return (0);
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}
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int
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ofw_write(ofwh_t devh, const void *buf, size_t len)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"write",
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3,
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1,
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(u_ofwh_t)devh,
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(ofwcell_t)buf,
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len,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_write: devh=0x%x buf=%p len=%u\n", devh, buf, len);
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return (1);
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}
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return (0);
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}
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int
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ofw_seek(ofwh_t devh, u_int64_t off)
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{
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ofwcell_t args[] = {
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(ofwcell_t)"seek",
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4,
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1,
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(u_ofwh_t)devh,
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off >> 32,
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off,
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0
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};
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if ((*ofw)(args)) {
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printf("ofw_seek: devh=0x%x off=0x%lx\n", devh, off);
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return (1);
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}
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return (0);
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}
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static int
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strcmp(const char *s1, const char *s2)
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{
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for (; *s1 == *s2 && *s1; s1++, s2++)
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;
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return ((u_char)*s1 - (u_char)*s2);
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}
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static void *
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memset(void *dst, int val, size_t len)
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{
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void *ret;
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ret = dst;
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while (len) {
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*((char *)dst)++ = val;
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len--;
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}
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return (ret);
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}
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static int
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fsfind(const char *name, ino_t * ino)
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{
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char buf[DEV_BSIZE];
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struct dirent *d;
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char *s;
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ssize_t n;
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fs_off = 0;
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while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0) {
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for (s = buf; s < buf + DEV_BSIZE;) {
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d = (void *)s;
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if (!strcmp(name, d->d_name)) {
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*ino = d->d_fileno;
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return (d->d_type);
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}
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s += d->d_reclen;
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}
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}
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return (0);
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}
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static void
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putc(int c)
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{
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char d;
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d = c;
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ofw_write(stdouth, &d, 1);
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}
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int
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main(void)
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{
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if (bname[0] == '\0')
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memcpy(bname, _PATH_LOADER, sizeof(_PATH_LOADER));
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printf(" \n>> FreeBSD/sparc64 boot block\n"
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" Boot path: %s\n"
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" Boot loader: %s\n", bootpath, _PATH_LOADER);
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load(bname);
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return (1);
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}
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static void
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load(const char *fname)
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{
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Elf64_Ehdr eh;
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Elf64_Phdr ep[2];
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Elf64_Shdr es[2];
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caddr_t p;
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ino_t ino;
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vm_offset_t entry;
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int i, j;
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if ((ino = lookup(fname)) == 0) {
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printf("File %s not found\n", fname);
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return;
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}
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if (fsread(ino, &eh, sizeof(eh)) != sizeof(eh))
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return;
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if (!IS_ELF(eh)) {
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printf("Not an ELF file\n");
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return;
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}
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fs_off = eh.e_phoff;
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for (j = i = 0; i < eh.e_phnum && j < 2; i++) {
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if (fsread(ino, ep + j, sizeof(ep[0])) != sizeof(ep[0]))
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return;
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if (ep[j].p_type == PT_LOAD)
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j++;
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}
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for (i = 0; i < j; i++) {
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p = (caddr_t)ep[i].p_vaddr;
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fs_off = ep[i].p_offset;
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if (fsread(ino, p, ep[i].p_filesz) != ep[i].p_filesz)
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return;
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/*
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* Assume the second program header table entry
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* to contain data and bss. Clear out the .bss section.
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*/
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if (i == 1) {
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memset(p + ep[i].p_filesz, 0,
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ep[i].p_memsz - ep[i].p_filesz);
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}
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}
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p += roundup2(ep[1].p_memsz, PAGE_SIZE);
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if (eh.e_shnum == eh.e_shstrndx + 3) {
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fs_off = eh.e_shoff + sizeof(es[0]) * (eh.e_shstrndx + 1);
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if (fsread(ino, &es, sizeof(es)) != sizeof(es))
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return;
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for (i = 0; i < 2; i++) {
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memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size));
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p += sizeof(es[i].sh_size);
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fs_off = es[i].sh_offset;
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if (fsread(ino, p, es[i].sh_size) != es[i].sh_size)
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return;
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p += es[i].sh_size;
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}
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}
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entry = eh.e_entry;
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ofw_close(bootdevh);
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(*(void (*)(int, int, int, int, ofwfp_t))entry)(0, 0, 0, 0, ofw);
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}
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static ino_t
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lookup(const char *path)
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{
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char name[MAXNAMLEN + 1];
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const char *s;
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ino_t ino;
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ssize_t n;
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int dt;
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ino = ROOTINO;
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dt = DT_DIR;
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name[0] = '/';
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name[1] = '\0';
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for (;;) {
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if (*path == '/')
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path++;
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if (!*path)
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break;
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for (s = path; *s && *s != '/'; s++)
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;
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if ((n = s - path) > MAXNAMLEN)
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return (0);
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memcpy(name, path, n);
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name[n] = 0;
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if (dt != DT_DIR) {
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printf("%s: not a directory.\n", name);
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return (0);
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}
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if ((dt = fsfind(name, &ino)) <= 0)
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break;
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path = s;
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}
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return (dt == DT_REG ? ino : 0);
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}
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static ssize_t
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fsread(ino_t inode, void *buf, size_t nbyte)
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{
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static struct fs fs;
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static struct dinode din;
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static char blkbuf[BSIZEMAX];
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static ufs_daddr_t indbuf[BSIZEMAX / sizeof(ufs_daddr_t)];
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static ino_t inomap;
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static ufs_daddr_t blkmap, indmap;
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static unsigned int fsblks;
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char *s;
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ufs_daddr_t lbn, addr;
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size_t n, nb, off;
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if (!dsk.meta) {
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inomap = 0;
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if (dskread(blkbuf, SBOFF / DEV_BSIZE, SBSIZE / DEV_BSIZE))
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return (-1);
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memcpy(&fs, blkbuf, sizeof(fs));
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if (fs.fs_magic != FS_MAGIC) {
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printf("Not ufs\n");
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return (-1);
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}
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fsblks = fs.fs_bsize >> DEV_BSHIFT;
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dsk.meta++;
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}
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if (!inode)
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return (0);
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if (inomap != inode) {
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if (dskread(blkbuf, fsbtodb(&fs, ino_to_fsba(&fs, inode)),
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fsblks))
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return (-1);
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din = ((struct dinode *)blkbuf)[inode % INOPB(&fs)];
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inomap = inode;
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fs_off = 0;
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blkmap = indmap = 0;
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}
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s = buf;
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if (nbyte > (n = din.di_size - fs_off))
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nbyte = n;
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nb = nbyte;
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while (nb) {
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lbn = lblkno(&fs, fs_off);
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if (lbn < NDADDR)
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addr = din.di_db[lbn];
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else {
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if (indmap != din.di_ib[0]) {
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if (dskread(indbuf, fsbtodb(&fs, din.di_ib[0]),
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fsblks))
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return (-1);
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indmap = din.di_ib[0];
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}
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addr = indbuf[(lbn - NDADDR) % NINDIR(&fs)];
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}
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n = dblksize(&fs, &din, lbn);
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if (blkmap != addr) {
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if (dskread(blkbuf, fsbtodb(&fs, addr),
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n >> DEV_BSHIFT)) {
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return (-1);
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}
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blkmap = addr;
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}
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off = blkoff(&fs, fs_off);
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n -= off;
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if (n > nb)
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n = nb;
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memcpy(s, blkbuf + off, n);
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s += n;
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fs_off += n;
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nb -= n;
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}
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return (nbyte);
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}
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static int
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dskread(void *buf, u_int64_t lba, int nblk)
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{
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/*
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* The OpenFirmware should open the correct partition for us.
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* That means, if we read from offset zero on an open instance handle,
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* we should read from offset zero of that partition.
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*/
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ofw_seek(bootdevh, lba * DEV_BSIZE);
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ofw_read(bootdevh, buf, nblk * DEV_BSIZE);
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return (0);
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}
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static int
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printf(const char *fmt,...)
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{
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static const char digits[16] = "0123456789abcdef";
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va_list ap;
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char buf[10];
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char *s;
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unsigned long int r, u;
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int c, longp;
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va_start(ap, fmt);
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longp = 0;
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while ((c = *fmt++)) {
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if (c == '%' || longp) {
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if (c == '%')
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c = *fmt++;
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switch (c) {
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case 'c':
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if (longp)
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break;
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putchar(va_arg(ap, int));
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continue;
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case 's':
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if (longp)
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break;
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for (s = va_arg(ap, char *); *s; s++)
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putchar(*s);
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continue;
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case 'p':
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if (longp)
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break;
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if (c == 'p') {
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putchar('0');
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putchar('x');
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}
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case 'u':
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case 'x':
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r = c == 'u' ? 10U : 16U;
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u = (c == 'p' || longp) ?
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va_arg(ap, unsigned long) :
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va_arg(ap, unsigned int);
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s = buf;
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do
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*s++ = digits[u % r];
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while (u /= r);
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while (--s >= buf)
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putchar(*s);
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longp = 0;
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continue;
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case 'l':
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if (longp)
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break;
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longp = 1;
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continue;
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}
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longp = 0;
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}
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putchar(c);
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}
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va_end(ap);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
putchar(int c)
|
|
{
|
|
if (c == '\n')
|
|
putc('\r');
|
|
putc(c);
|
|
return (c);
|
|
}
|
|
|
|
static void *
|
|
memcpy(void *dst, const void *src, size_t size)
|
|
{
|
|
const char *s;
|
|
char *d;
|
|
|
|
for (d = dst, s = src; size; size--)
|
|
*d++ = *s++;
|
|
return (dst);
|
|
}
|