533 lines
13 KiB
C
533 lines
13 KiB
C
/* $NetBSD: boot.c,v 1.5 1999/04/17 21:16:47 ws Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* ELF support derived from NetBSD/alpha's boot loader, written
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* by Christopher G. Demetriou.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* First try for the boot code
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*
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* Input syntax is:
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* [promdev[{:|,}partition]]/[filename] [flags]
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*/
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#define ELFSIZE 32 /* We use 32-bit ELF. */
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/exec_elf.h>
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#include <sys/reboot.h>
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#include <sys/disklabel.h>
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <machine/cpu.h>
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#include <machine/machine_type.h>
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#include "ofdev.h"
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#include "openfirm.h"
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char bootdev[128];
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char bootfile[128];
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int boothowto;
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int debug;
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#ifdef POWERPC_BOOT_ELF
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int elf_exec __P((int, Elf_Ehdr *, u_int32_t *, void **));
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#endif
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#ifdef POWERPC_BOOT_AOUT
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int aout_exec __P((int, struct exec *, u_int32_t *, void **));
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#endif
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static void
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prom2boot(dev)
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char *dev;
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{
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char *cp;
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for (cp = dev; *cp != '\0'; cp++)
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if (*cp == ':') {
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*cp = '\0';
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return;
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}
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}
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static void
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parseargs(str, howtop)
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char *str;
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int *howtop;
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{
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char *cp;
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/* Allow user to drop back to the PROM. */
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if (strcmp(str, "exit") == 0)
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OF_exit();
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*howtop = 0;
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for (cp = str; *cp; cp++)
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if (*cp == ' ' || *cp == '-')
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break;
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if (!*cp)
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return;
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*cp++ = 0;
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while (*cp) {
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switch (*cp++) {
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case 'a':
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*howtop |= RB_ASKNAME;
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break;
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case 's':
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*howtop |= RB_SINGLE;
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break;
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case 'd':
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*howtop |= RB_KDB;
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debug = 1;
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break;
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}
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}
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}
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static void
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chain(entry, args, esym)
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void (*entry)();
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char *args;
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void *esym;
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{
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extern char end[];
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int l, machine_tag;
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freeall();
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/*
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* Stash pointer to end of symbol table after the argument
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* strings.
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*/
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l = strlen(args) + 1;
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bcopy(&esym, args + l, sizeof(esym));
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l += sizeof(esym);
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/*
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* Tell the kernel we're an OpenFirmware system.
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*/
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machine_tag = POWERPC_MACHINE_OPENFIRMWARE;
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bcopy(&machine_tag, args + l, sizeof(machine_tag));
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l += sizeof(machine_tag);
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OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l);
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panic("chain");
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}
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int
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loadfile(fd, args)
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int fd;
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char *args;
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{
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union {
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#ifdef POWERPC_BOOT_AOUT
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struct exec aout;
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#endif
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#ifdef POWERPC_BOOT_ELF
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Elf_Ehdr elf;
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#endif
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} hdr;
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int rval;
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u_int32_t entry;
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void *esym;
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rval = 1;
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esym = NULL;
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/* Load the header. */
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if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
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printf("read header: %s\n", strerror(errno));
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goto err;
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}
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/* Determine file type, load kernel. */
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#ifdef POWERPC_BOOT_AOUT
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if (N_BADMAG(hdr.aout) == 0 && N_GETMID(hdr.aout) == MID_POWERPC) {
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rval = aout_exec(fd, &hdr.aout, &entry, &esym);
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} else
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#endif
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#ifdef POWERPC_BOOT_ELF
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if (memcmp(Elf_e_ident, hdr.elf.e_ident, Elf_e_siz) == 0) {
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rval = elf_exec(fd, &hdr.elf, &entry, &esym);
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} else
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#endif
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{
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printf("unknown executable format\n");
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}
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if (rval)
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goto err;
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printf(" start=0x%x\n", entry);
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close(fd);
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/* XXX this should be replaced w/ a mountroothook. */
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if (floppyboot) {
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printf("Please insert root disk and press ENTER ");
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getchar();
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printf("\n");
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}
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chain((void *)entry, args, esym);
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/* NOTREACHED */
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err:
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close(fd);
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return (rval);
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}
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__dead void
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_rtt()
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{
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OF_exit();
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}
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#ifdef POWERPC_BOOT_AOUT
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int
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aout_exec(fd, hdr, entryp, esymp)
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int fd;
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struct exec *hdr;
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u_int32_t *entryp;
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void **esymp;
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{
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void *addr;
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int n, *paddr;
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/* Display the load address (entry point) for a.out. */
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printf("Booting %s @ 0x%lx\n", opened_name, hdr->a_entry);
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addr = (void *)(hdr->a_entry);
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/*
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* Determine memory needed for kernel and allocate it from
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* the firmware.
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*/
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n = hdr->a_text + hdr->a_data + hdr->a_bss + hdr->a_syms + sizeof(int);
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if ((paddr = OF_claim(addr, n, 0)) == (int *)-1)
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panic("cannot claim memory");
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/* Load text. */
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lseek(fd, N_TXTOFF(*hdr), SEEK_SET);
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printf("%lu", hdr->a_text);
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if (read(fd, paddr, hdr->a_text) != hdr->a_text) {
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printf("read text: %s\n", strerror(errno));
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return (1);
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}
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__syncicache((void *)paddr, hdr->a_text);
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/* Load data. */
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printf("+%lu", hdr->a_data);
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if (read(fd, (void *)paddr + hdr->a_text, hdr->a_data) != hdr->a_data) {
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printf("read data: %s\n", strerror(errno));
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return (1);
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}
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/* Zero BSS. */
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printf("+%lu", hdr->a_bss);
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bzero((void *)paddr + hdr->a_text + hdr->a_data, hdr->a_bss);
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/* Symbols. */
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*esymp = paddr;
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paddr = (int *)((void *)paddr + hdr->a_text + hdr->a_data + hdr->a_bss);
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*paddr++ = hdr->a_syms;
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if (hdr->a_syms) {
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printf(" [%lu", hdr->a_syms);
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if (read(fd, paddr, hdr->a_syms) != hdr->a_syms) {
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printf("read symbols: %s\n", strerror(errno));
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return (1);
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}
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paddr = (int *)((void *)paddr + hdr->a_syms);
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if (read(fd, &n, sizeof(int)) != sizeof(int)) {
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printf("read symbols: %s\n", strerror(errno));
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return (1);
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}
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if (OF_claim((void *)paddr, n + sizeof(int), 0) == (void *)-1)
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panic("cannot claim memory");
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*paddr++ = n;
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if (read(fd, paddr, n - sizeof(int)) != n - sizeof(int)) {
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printf("read symbols: %s\n", strerror(errno));
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return (1);
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}
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printf("+%d]", n - sizeof(int));
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*esymp = paddr + (n - sizeof(int));
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}
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*entryp = hdr->a_entry;
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return (0);
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}
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#endif /* POWERPC_BOOT_AOUT */
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#ifdef POWERPC_BOOT_ELF
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int
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elf_exec(fd, elf, entryp, esymp)
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int fd;
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Elf_Ehdr *elf;
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u_int32_t *entryp;
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void **esymp;
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{
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Elf32_Shdr *shp;
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Elf32_Off off;
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void *addr;
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size_t size;
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int i, first = 1;
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int n;
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/*
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* Don't display load address for ELF; it's encoded in
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* each section.
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*/
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printf("Booting %s\n", opened_name);
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for (i = 0; i < elf->e_phnum; i++) {
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Elf_Phdr phdr;
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(void)lseek(fd, elf->e_phoff + sizeof(phdr) * i, SEEK_SET);
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if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
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printf("read phdr: %s\n", strerror(errno));
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return (1);
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}
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if (phdr.p_type != Elf_pt_load ||
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(phdr.p_flags & (Elf_pf_w|Elf_pf_x)) == 0)
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continue;
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/* Read in segment. */
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printf("%s%lu@0x%lx", first ? "" : "+", phdr.p_filesz,
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(u_long)phdr.p_vaddr);
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(void)lseek(fd, phdr.p_offset, SEEK_SET);
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if (OF_claim((void *)phdr.p_vaddr, phdr.p_memsz, 0) ==
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(void *)-1)
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panic("cannot claim memory");
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if (read(fd, (void *)phdr.p_vaddr, phdr.p_filesz) !=
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phdr.p_filesz) {
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printf("read segment: %s\n", strerror(errno));
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return (1);
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}
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__syncicache((void *)phdr.p_vaddr, phdr.p_filesz);
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/* Zero BSS. */
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if (phdr.p_filesz < phdr.p_memsz) {
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printf("+%lu@0x%lx", phdr.p_memsz - phdr.p_filesz,
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(u_long)(phdr.p_vaddr + phdr.p_filesz));
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bzero((void *)phdr.p_vaddr + phdr.p_filesz,
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phdr.p_memsz - phdr.p_filesz);
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}
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first = 0;
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}
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printf(" \n");
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#if 0 /* I want to rethink this... --thorpej@netbsd.org */
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/*
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* Compute the size of the symbol table.
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*/
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size = sizeof(Elf_Ehdr) + (elf->e_shnum * sizeof(Elf32_Shdr));
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shp = addr = alloc(elf->e_shnum * sizeof(Elf32_Shdr));
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(void)lseek(fd, elf->e_shoff, SEEK_SET);
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if (read(fd, addr, elf->e_shnum * sizeof(Elf32_Shdr)) !=
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elf->e_shnum * sizeof(Elf32_Shdr)) {
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printf("read section headers: %s\n", strerror(errno));
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return (1);
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}
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for (i = 0; i < elf->e_shnum; i++, shp++) {
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if (shp->sh_type == Elf_sht_null)
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continue;
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if (shp->sh_type != Elf_sht_symtab
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&& shp->sh_type != Elf_sht_strtab) {
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shp->sh_offset = 0;
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shp->sh_type = Elf_sht_nobits;
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continue;
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}
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size += shp->sh_size;
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}
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shp = addr;
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/*
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* Reserve memory for the symbols.
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*/
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if ((addr = OF_claim(0, size, NBPG)) == (void *)-1)
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panic("no space for symbol table");
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/*
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* Copy the headers.
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*/
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elf->e_phoff = 0;
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elf->e_shoff = sizeof(Elf_Ehdr);
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elf->e_phentsize = 0;
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elf->e_phnum = 0;
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bcopy(elf, addr, sizeof(Elf_Ehdr));
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bcopy(shp, addr + sizeof(Elf_Ehdr), elf->e_shnum * sizeof(Elf32_Shdr));
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free(shp, elf->e_shnum * sizeof(Elf32_Shdr));
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*ssymp = addr;
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/*
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* Now load the symbol sections themselves.
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*/
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shp = addr + sizeof(Elf_Ehdr);
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addr += sizeof(Elf_Ehdr) + (elf->e_shnum * sizeof(Elf32_Shdr));
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off = sizeof(Elf_Ehdr) + (elf->e_shnum * sizeof(Elf32_Shdr));
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for (first = 1, i = 0; i < elf->e_shnum; i++, shp++) {
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if (shp->sh_type == Elf_sht_symtab
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|| shp->sh_type == Elf_sht_strtab) {
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if (first)
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printf("symbols @ 0x%lx ", (u_long)addr);
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printf("%s%d", first ? "" : "+", shp->sh_size);
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(void)lseek(fd, shp->sh_offset, SEEK_SET);
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if (read(fd, addr, shp->sh_size) != shp->sh_size) {
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printf("read symbols: %s\n", strerror(errno));
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return (1);
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}
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addr += shp->sh_size;
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shp->sh_offset = off;
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off += shp->sh_size;
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first = 0;
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}
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}
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*esymp = addr;
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#endif /* 0 */
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*entryp = elf->e_entry;
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return (0);
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}
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#endif /* POWERPC_BOOT_ELF */
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void
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main()
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{
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extern char bootprog_name[], bootprog_rev[],
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bootprog_maker[], bootprog_date[];
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int chosen;
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char bootline[512]; /* Should check size? */
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char *cp;
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int fd;
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printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
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printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
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/*
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* Get the boot arguments from Openfirmware
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*/
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if ((chosen = OF_finddevice("/chosen")) == -1 ||
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OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
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OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) {
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printf("Invalid Openfirmware environment\n");
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OF_exit();
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}
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prom2boot(bootdev);
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parseargs(bootline, &boothowto);
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for (;;) {
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if (boothowto & RB_ASKNAME) {
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printf("Boot: ");
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gets(bootline);
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parseargs(bootline, &boothowto);
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}
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if ((fd = open(bootline, 0)) >= 0)
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break;
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if (errno)
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printf("open %s: %s\n", opened_name, strerror(errno));
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boothowto |= RB_ASKNAME;
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}
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#ifdef __notyet__
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OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1);
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cp = bootline;
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#else
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strcpy(bootline, opened_name);
|
|
cp = bootline + strlen(bootline);
|
|
*cp++ = ' ';
|
|
#endif
|
|
*cp = '-';
|
|
if (boothowto & RB_ASKNAME)
|
|
*++cp = 'a';
|
|
if (boothowto & RB_SINGLE)
|
|
*++cp = 's';
|
|
if (boothowto & RB_KDB)
|
|
*++cp = 'd';
|
|
if (*cp == '-')
|
|
#ifdef __notyet__
|
|
*cp = 0;
|
|
#else
|
|
*--cp = 0;
|
|
#endif
|
|
else
|
|
*++cp = 0;
|
|
#ifdef __notyet__
|
|
OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1);
|
|
#endif
|
|
/* XXX void, for now */
|
|
(void)loadfile(fd, bootline);
|
|
|
|
OF_exit();
|
|
}
|