c2f9d95de5
'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
317 lines
10 KiB
C
317 lines
10 KiB
C
/* $Id$ */
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/* $NetBSD: loadfile.c,v 1.10 1998/06/25 06:45:46 ross 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 of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
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#include <stand.h>
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#include <string.h>
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#include <sys/param.h>
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#include <machine/elf.h>
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#include <machine/prom.h>
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#include <machine/rpb.h>
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#include <machine/bootinfo.h>
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#include "bootstrap.h"
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#define _KERNEL
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struct elf_kernel_module
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{
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struct loaded_module m;
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vm_offset_t m_entry; /* module entrypoint */
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struct bootinfo_v1 m_bi; /* legacy bootinfo */
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};
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static int elf_loadmodule(char *filename, vm_offset_t dest, struct loaded_module **result);
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static int elf_exec(struct loaded_module *amp);
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static int elf_load(int fd, Elf_Ehdr *elf, vm_offset_t dest);
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struct module_format alpha_elf = { MF_ELF, elf_loadmodule, elf_exec };
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vm_offset_t ffp_save, ptbr_save;
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vm_offset_t ssym, esym;
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static int
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elf_loadmodule(char *filename, vm_offset_t dest, struct loaded_module **result)
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{
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struct elf_kernel_module *mp;
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Elf_Ehdr hdr;
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ssize_t nr;
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int fd, rval;
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/* Open the file. */
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rval = 1;
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if ((fd = open(filename, 0)) < 0) {
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(void)printf("open %s: %s\n", filename, strerror(errno));
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goto err;
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}
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/* Read the exec header. */
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if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
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(void)printf("read header: %s\n", strerror(errno));
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goto err;
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}
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if (!(hdr.e_ident[0] == ELFMAG0
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&& hdr.e_ident[1] == ELFMAG1
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&& hdr.e_ident[2] == ELFMAG2
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&& hdr.e_ident[3] == ELFMAG3)) {
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(void)printf("%s: unknown executable format\n", filename);
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goto err;
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}
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/*
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* Ok, we think this is for us.
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*/
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mp = malloc(sizeof(struct elf_kernel_module));
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mp->m.m_name = strdup(filename); /* XXX should we prune the name? */
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mp->m.m_type = "elf kernel"; /* XXX only if that's what we really are */
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mp->m.m_args = NULL; /* XXX should we put the bootstrap args here and parse later? */
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mp->m.m_flags = MF_ELF; /* we're an elf kernel */
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mp->m_entry = hdr.e_entry;
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if (dest == 0)
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dest = (vm_offset_t) hdr.e_entry;
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if (mod_findmodule(NULL, mp->m.m_type) != NULL) {
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printf("elf_loadmodule: kernel already loaded\n");
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rval = EPERM;
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goto err;
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}
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rval = elf_load(fd, &hdr, (vm_offset_t) dest);
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*result = (struct loaded_module *)mp;
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err:
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if (fd >= 0)
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(void)close(fd);
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return (rval);
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}
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static int
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elf_load(int fd, Elf_Ehdr *elf, vm_offset_t dest)
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{
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Elf_Shdr *shp;
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Elf_Off off;
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int i;
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int first = 1;
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int havesyms;
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for (i = 0; i < elf->e_phnum; i++) {
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Elf_Phdr phdr;
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if (lseek(fd, elf->e_phoff + sizeof(phdr) * i, SEEK_SET)
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== -1) {
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(void)printf("lseek phdr: %s\n", strerror(errno));
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return (1);
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}
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if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
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(void)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 != PT_LOAD ||
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(phdr.p_flags & (PF_W|PF_X)) == 0)
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continue;
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/* Read in segment. */
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(void)printf("%s%lu", first ? "" : "+", phdr.p_filesz);
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if (lseek(fd, phdr.p_offset, SEEK_SET) == -1) {
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(void)printf("lseek text: %s\n", strerror(errno));
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return (1);
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}
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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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(void)printf("read text: %s\n", strerror(errno));
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return (1);
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}
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if (first || ffp_save < phdr.p_vaddr + phdr.p_memsz)
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ffp_save = phdr.p_vaddr + phdr.p_memsz;
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/* Zero out bss. */
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if (phdr.p_filesz < phdr.p_memsz) {
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(void)printf("+%lu", phdr.p_memsz - 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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/*
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* Copy the ELF and section headers.
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*/
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ffp_save = roundup(ffp_save, sizeof(long));
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ssym = ffp_save;
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bcopy(elf, (void *)ffp_save, sizeof(Elf_Ehdr));
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ffp_save += sizeof(Elf_Ehdr);
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if (lseek(fd, elf->e_shoff, SEEK_SET) == -1) {
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printf("lseek section headers: %s\n", strerror(errno));
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return (1);
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}
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if (read(fd, (void *)ffp_save, elf->e_shnum * sizeof(Elf_Shdr)) !=
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elf->e_shnum * sizeof(Elf_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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shp = (Elf_Shdr *)ffp_save;
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ffp_save += roundup((elf->e_shnum * sizeof(Elf_Shdr)), sizeof(long));
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/*
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* Now load the symbol sections themselves. Make sure the
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* sections are aligned. Don't bother with string tables if
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* there are no symbol sections.
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*/
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off = roundup((sizeof(Elf_Ehdr) + (elf->e_shnum * sizeof(Elf_Shdr))),
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sizeof(long));
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for (havesyms = i = 0; i < elf->e_shnum; i++)
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if (shp[i].sh_type == SHT_SYMTAB)
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havesyms = 1;
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for (first = 1, i = 0; i < elf->e_shnum; i++) {
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if (shp[i].sh_type == SHT_SYMTAB ||
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shp[i].sh_type == SHT_STRTAB) {
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printf("%s%ld", first ? " [" : "+", shp[i].sh_size);
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if (havesyms) {
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if (lseek(fd, shp[i].sh_offset, SEEK_SET)
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== -1) {
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printf("\nlseek symbols: %s\n",
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strerror(errno));
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return (1);
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}
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if (read(fd, (void *)ffp_save, shp[i].sh_size)
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!= shp[i].sh_size) {
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printf("\nread symbols: %s\n",
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strerror(errno));
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return (1);
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}
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}
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ffp_save += roundup(shp[i].sh_size, sizeof(long));
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shp[i].sh_offset = off;
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off += roundup(shp[i].sh_size, sizeof(long));
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first = 0;
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}
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}
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esym = ffp_save;
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if (first == 0)
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printf("]");
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ffp_save = ALPHA_K0SEG_TO_PHYS((ffp_save + PAGE_MASK) & ~PAGE_MASK)
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>> PAGE_SHIFT;
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ffp_save += 2; /* XXX OSF/1 does this, no idea why. */
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(void)printf("\n");
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/*
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* Frob the copied ELF header to give information relative
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* to ssym.
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*/
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elf = (Elf_Ehdr *)ssym;
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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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return (0);
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}
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static int
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elf_exec(struct loaded_module *amp)
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{
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struct elf_kernel_module *mp = (struct elf_kernel_module *)amp;
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static struct bootinfo_v1 bootinfo_v1;
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/*
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* Fill in the bootinfo for the kernel.
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*/
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bzero(&bootinfo_v1, sizeof(bootinfo_v1));
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bootinfo_v1.ssym = ssym;
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bootinfo_v1.esym = esym;
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strncpy(bootinfo_v1.booted_kernel, mp->m.m_name,
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sizeof(bootinfo_v1.booted_kernel));
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prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo_v1.boot_flags,
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sizeof(bootinfo_v1.boot_flags));
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bootinfo_v1.hwrpb = (void *)HWRPB_ADDR;
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bootinfo_v1.hwrpbsize = ((struct rpb *)HWRPB_ADDR)->rpb_size;
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bootinfo_v1.cngetc = NULL;
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bootinfo_v1.cnputc = NULL;
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bootinfo_v1.cnpollc = NULL;
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printf("Entering %s at 0x%lx...\n", mp->m.m_name, mp->m_entry);
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closeall();
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alpha_pal_imb();
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(*(void (*)())mp->m_entry)(ffp_save, ptbr_save,
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BOOTINFO_MAGIC, &bootinfo_v1, 1, 0);
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}
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