312 lines
9.4 KiB
C
312 lines
9.4 KiB
C
/* $NetBSD: loadfile.c,v 1.7 1997/09/06 14:03:57 drochner 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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#define ELFSIZE 64
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/exec_ecoff.h>
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#include <sys/exec_elf.h>
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#include <machine/prom.h>
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#define _KERNEL
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#include "include/pte.h"
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#ifdef ALPHA_BOOT_ECOFF
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static int coff_exec __P((int, struct ecoff_exechdr *, u_int64_t *));
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#endif
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#ifdef ALPHA_BOOT_ELF
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static int elf_exec __P((int, Elf_Ehdr *, u_int64_t *));
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#endif
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int loadfile __P((char *, u_int64_t *));
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vm_offset_t ffp_save, ptbr_save;
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vm_offset_t ssym, esym;
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/*
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* Open 'filename', read in program and return the entry point or -1 if error.
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*/
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int
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loadfile(fname, entryp)
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char *fname;
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u_int64_t *entryp;
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{
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union {
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#ifdef ALPHA_BOOT_ECOFF
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struct ecoff_exechdr coff;
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#endif
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#ifdef ALPHA_BOOT_ELF
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Elf_Ehdr elf;
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#endif
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} hdr;
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ssize_t nr;
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int fd, rval;
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printf("\nLoading %s...\n", fname);
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/* Open the file. */
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rval = 1;
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if ((fd = open(fname, 0)) < 0) {
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(void)printf("open %s: %s\n", fname, 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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#ifdef ALPHA_BOOT_ECOFF
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if (!ECOFF_BADMAG(&hdr.coff)) {
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rval = coff_exec(fd, &hdr.coff, entryp);
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} else
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#endif
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#ifdef ALPHA_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, entryp);
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} else
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#endif
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{
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(void)printf("%s: unknown executable format\n", fname);
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}
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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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#ifdef ALPHA_BOOT_ECOFF
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static int
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coff_exec(fd, coff, entryp)
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int fd;
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struct ecoff_exechdr *coff;
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u_int64_t *entryp;
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{
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/* Read in text. */
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(void)printf("%lu", coff->a.tsize);
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(void)lseek(fd, ECOFF_TXTOFF(coff), 0);
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if (read(fd, (void *)coff->a.text_start, coff->a.tsize) !=
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coff->a.tsize) {
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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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/* Read in data. */
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if (coff->a.dsize != 0) {
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(void)printf("+%lu", coff->a.dsize);
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if (read(fd, (void *)coff->a.data_start, coff->a.dsize) !=
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coff->a.dsize) {
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(void)printf("read data: %s\n", strerror(errno));
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return (1);
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}
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}
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/* Zero out bss. */
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if (coff->a.bsize != 0) {
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(void)printf("+%lu", coff->a.bsize);
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bzero((void *)coff->a.bss_start, coff->a.bsize);
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}
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ffp_save = coff->a.text_start + coff->a.tsize;
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if (ffp_save < coff->a.data_start + coff->a.dsize)
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ffp_save = coff->a.data_start + coff->a.dsize;
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if (ffp_save < coff->a.bss_start + coff->a.bsize)
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ffp_save = coff->a.bss_start + coff->a.bsize;
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ffp_save = ALPHA_K0SEG_TO_PHYS((ffp_save + PGOFSET) & ~PGOFSET) >> PGSHIFT;
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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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*entryp = coff->a.entry;
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return (0);
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}
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#endif /* ALPHA_BOOT_ECOFF */
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#ifdef ALPHA_BOOT_ELF
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static int
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elf_exec(fd, elf, entryp)
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int fd;
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Elf_Ehdr *elf;
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u_int64_t *entryp;
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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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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, 0);
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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 != 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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(void)printf("%s%lu", first ? "" : "+", phdr.p_filesz);
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(void)lseek(fd, phdr.p_offset, 0);
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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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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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(void)lseek(fd, elf->e_shoff, SEEK_SET);
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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.
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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 (first = 1, i = 0; i < elf->e_shnum; i++) {
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if (shp[i].sh_type == Elf_sht_symtab ||
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shp[i].sh_type == Elf_sht_strtab) {
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printf("%s%ld", first ? " [" : "+", shp[i].sh_size);
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(void)lseek(fd, shp[i].sh_offset, SEEK_SET);
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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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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 + PGOFSET) & ~PGOFSET)
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>> PGSHIFT;
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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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*entryp = elf->e_entry;
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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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#endif /* ALPHA_BOOT_ELF */
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