Add loadfile.c (stolen from Jason's alpha/stand/common/loadfile.c)
loadfile.h contains macros that are supposed to be MD, but loadfile.c is now MI. Fixes: - a.out support - pass information values via an array not global variables - don't assume that you can access memory directly. - remove MD parts - remove some printfs. XXX: loadfile.c needs to be moved somewhere where other ports can use it. XXX2: read() routines on the i386 don't appear to set errno on failure.
This commit is contained in:
christos
parent
18949858f3
commit
0fcf083702
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@ -1,4 +1,4 @@
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# $NetBSD: Makefile,v 1.5 1997/09/17 17:51:12 drochner Exp $
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# $NetBSD: Makefile,v 1.6 1999/01/28 20:18:31 christos Exp $
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S?= ${.CURDIR}/../../../../
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@ -19,7 +19,7 @@ SRCS= pcio.c conio.S comio.S comio_direct.c
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SRCS+= getsecs.c biosgetrtc.S biosdelay.S biosreboot.S gatea20.c
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SRCS+= biosmem.S getextmemx.c biosmemx.S
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SRCS+= pread.c menuutils.c parseutils.c bootinfo.c bootinfo_biosgeom.c
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SRCS+= exec.c startprog.S netbsd_opts.c panic.c
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SRCS+= exec.c loadfile.c startprog.S netbsd_opts.c panic.c
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.if (${I386_INCLUDE_DISK} == "yes")
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SRCS+= biosdisk.c biosdisk_ll.c bios_disk.S
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.endif
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@ -0,0 +1,467 @@
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/* $NetBSD: loadfile.c,v 1.1 1999/01/28 20:18:31 christos 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 <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 "loadfile.h"
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#ifdef BOOT_ECOFF
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#include <sys/exec_ecoff.h>
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static int coff_exec __P((int, struct ecoff_exechdr *, u_long *));
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#endif
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#ifdef BOOT_ELF
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#include <sys/exec_elf.h>
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static int elf_exec __P((int, Elf_Ehdr *, u_long *));
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#endif
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#ifdef BOOT_AOUT
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#include <sys/exec_aout.h>
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static int aout_exec __P((int, struct exec *, u_long *));
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#endif
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/*
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* Open 'filename', read in program and and return 0 if ok 1 on error.
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* Fill in entryp and endp.
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*/
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int
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loadfile(fname, marks)
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const char *fname;
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u_long *marks;
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{
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union {
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#ifdef BOOT_ECOFF
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struct ecoff_exechdr coff;
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#endif
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#ifdef BOOT_ELF
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Elf_Ehdr elf;
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#endif
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#ifdef BOOT_AOUT
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struct exec aout;
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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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/* Open the file. */
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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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return -1;
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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 BOOT_ECOFF
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if (!ECOFF_BADMAG(&hdr.coff)) {
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rval = coff_exec(fd, &hdr.coff, marks);
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} else
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#endif
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#ifdef 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, marks);
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} else
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#endif
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#ifdef BOOT_AOUT
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if (N_GETMAGIC(hdr.aout) == ZMAGIC &&
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N_GETMID(hdr.aout) == MID_MACHINE) {
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rval = aout_exec(fd, &hdr.aout, marks);
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} else
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#endif
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{
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rval = 1;
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(void)printf("%s: unknown executable format\n", fname);
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}
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if (rval == 0)
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(void)printf("=0x%lx\n", marks[LOAD_END] - marks[LOAD_START]);
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return fd;
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err:
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(void)close(fd);
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return -1;
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}
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#ifdef BOOT_ECOFF
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static int
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coff_exec(fd, coff, marks)
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int fd;
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struct ecoff_exechdr *coff;
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u_long *marks;
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{
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paddr_t ffp_save;
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/* Read in text. */
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(void)printf("%lu", coff->a.tsize);
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if (lseek(fd, ECOFF_TXTOFF(coff), 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, 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, 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(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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marks[LOAD_START] = LOADADDR(coff->a.entry);
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marks[LOAD_NSYM] = 1; /* XXX: Kernel needs >= 0 */
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marks[LOAD_SYM] = LOADADDR(ffp_save);
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marks[LOAD_END] = LOADADDR(ffp_save);
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return (0);
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}
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#endif /* BOOT_ECOFF */
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#ifdef BOOT_ELF
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static int
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elf_exec(fd, elf, marks)
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int fd;
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Elf_Ehdr *elf;
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u_long *marks;
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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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size_t sz;
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int first = 1;
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int havesyms;
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paddr_t ffp_save = marks[LOAD_START], shp_save;
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vaddr_t elf_save;
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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 != 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 ? "" : "+", (u_long)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, 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",
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(u_long)(phdr.p_memsz - phdr.p_filesz));
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BZERO((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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elf_save = ffp_save;
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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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(void)printf("lseek section headers: %s\n", strerror(errno));
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return (1);
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}
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sz = elf->e_shnum * sizeof(Elf_Shdr);
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shp = alloc(sz);
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|
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if (read(fd, shp, sz) != sz) {
|
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(void)printf("read section headers: %s\n", strerror(errno));
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return (1);
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}
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shp_save = ffp_save;
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ffp_save += roundup(sz, 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) + sz), sizeof(long));
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|
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for (havesyms = i = 0; i < elf->e_shnum; i++)
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if (shp[i].sh_type == Elf_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 == Elf_sht_symtab ||
|
||||
shp[i].sh_type == Elf_sht_strtab) {
|
||||
(void)printf("%s%ld", first ? " [" : "+",
|
||||
(u_long)shp[i].sh_size);
|
||||
if (havesyms) {
|
||||
if (lseek(fd, shp[i].sh_offset, SEEK_SET)
|
||||
== -1) {
|
||||
(void)printf("\nlseek symbols: %s\n",
|
||||
strerror(errno));
|
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free(shp, sz);
|
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return (1);
|
||||
}
|
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if (READ(fd, ffp_save, shp[i].sh_size)
|
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!= shp[i].sh_size) {
|
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(void)printf("\nread symbols: %s\n",
|
||||
strerror(errno));
|
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free(shp, sz);
|
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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;
|
||||
off += roundup(shp[i].sh_size, sizeof(long));
|
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first = 0;
|
||||
}
|
||||
}
|
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BCOPY(shp, shp_save, sz);
|
||||
free(shp, sz);
|
||||
|
||||
if (first == 0)
|
||||
(void)printf("]");
|
||||
|
||||
/*
|
||||
* Frob the copied ELF header to give information relative
|
||||
* to elf_save.
|
||||
*/
|
||||
elf->e_phoff = 0;
|
||||
elf->e_shoff = sizeof(Elf_Ehdr);
|
||||
elf->e_phentsize = 0;
|
||||
elf->e_phnum = 0;
|
||||
BCOPY(elf, elf_save, sizeof(*elf));
|
||||
|
||||
marks[LOAD_START] = LOADADDR(elf->e_entry);
|
||||
marks[LOAD_NSYM] = 1; /* XXX: Kernel needs >= 0 */
|
||||
marks[LOAD_SYM] = LOADADDR(elf_save);
|
||||
marks[LOAD_END] = LOADADDR(ffp_save);
|
||||
return (0);
|
||||
}
|
||||
#endif /* BOOT_ELF */
|
||||
|
||||
#ifdef BOOT_AOUT
|
||||
static int
|
||||
aout_exec(fd, x, marks)
|
||||
int fd;
|
||||
struct exec *x;
|
||||
u_long *marks;
|
||||
{
|
||||
u_long entry = x->a_entry;
|
||||
paddr_t ffp_save, aout_save;
|
||||
int cc;
|
||||
|
||||
if (marks[LOAD_START] == 0)
|
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ffp_save = ALIGNENTRY(entry);
|
||||
else
|
||||
ffp_save = marks[LOAD_START];
|
||||
|
||||
if (lseek(fd, sizeof(*x), SEEK_SET) == -1) {
|
||||
(void)printf("lseek a.out: %s\n", strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Leave a copy of the exec header before the text.
|
||||
* The kernel may use this to verify that the
|
||||
* symbols were loaded by this boot program.
|
||||
*/
|
||||
BCOPY(x, ffp_save, sizeof(*x));
|
||||
ffp_save += sizeof(*x);
|
||||
/*
|
||||
* Read in the text segment.
|
||||
*/
|
||||
|
||||
(void)printf("%ld", x->a_text);
|
||||
|
||||
if (READ(fd, ffp_save, x->a_text - sizeof(*x)) !=
|
||||
x->a_text - sizeof(*x)) {
|
||||
(void)printf("read text: %s\n", strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
ffp_save += x->a_text - sizeof(*x);
|
||||
|
||||
/*
|
||||
* Read in the data segment.
|
||||
*/
|
||||
|
||||
(void)printf("+%ld", x->a_data);
|
||||
|
||||
if (READ(fd, ffp_save, x->a_data) != x->a_data) {
|
||||
(void)printf("read data: %s\n", strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
ffp_save += x->a_data;
|
||||
|
||||
/*
|
||||
* Zero out the BSS section.
|
||||
* (Kernel doesn't care, but do it anyway.)
|
||||
*/
|
||||
|
||||
|
||||
(void)printf("+%ld", x->a_bss);
|
||||
|
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BZERO(ffp_save, x->a_bss);
|
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ffp_save += x->a_bss;
|
||||
|
||||
/*
|
||||
* Read in the symbol table and strings.
|
||||
* (Always set the symtab size word.)
|
||||
*/
|
||||
BCOPY(&x->a_syms, ffp_save, sizeof(x->a_syms));
|
||||
ffp_save += sizeof(x->a_syms);
|
||||
aout_save = ffp_save;
|
||||
|
||||
if (x->a_syms > 0) {
|
||||
/* Symbol table and string table length word. */
|
||||
|
||||
(void)printf("+[%ld", x->a_syms);
|
||||
|
||||
if (READ(fd, ffp_save, x->a_syms) != x->a_syms) {
|
||||
(void)printf("read symbols: %s\n", strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
ffp_save += x->a_syms;
|
||||
|
||||
read(fd, &cc, sizeof(cc));
|
||||
|
||||
BCOPY(&cc, ffp_save, sizeof(cc));
|
||||
ffp_save += sizeof(cc);
|
||||
|
||||
/* String table. Length word includes itself. */
|
||||
|
||||
(void)printf("+%d]", cc);
|
||||
|
||||
cc -= sizeof(int);
|
||||
if (cc <= 0) {
|
||||
(void)printf("symbol table too short\n");
|
||||
return 1;
|
||||
}
|
||||
if (READ(fd, ffp_save, cc) != cc) {
|
||||
(void)printf("read strings: %s\n", strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
ffp_save += cc;
|
||||
}
|
||||
|
||||
marks[LOAD_START] = LOADADDR(entry);
|
||||
marks[LOAD_NSYM] = x->a_syms;
|
||||
marks[LOAD_SYM] = LOADADDR(aout_save);
|
||||
marks[LOAD_END] = LOADADDR(ffp_save);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* BOOT_AOUT */
|
||||
|
|
@ -0,0 +1,58 @@
|
|||
/* $NetBSD: loadfile.h,v 1.1 1999/01/28 20:18:31 christos Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Christos Zoulas.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#define BOOT_AOUT
|
||||
#define BOOT_ELF
|
||||
#define ELFSIZE 32
|
||||
|
||||
#define LOADADDR(a) ((u_long)(a) & 0x00ffffff)
|
||||
#define ALIGNENTRY(a) ((u_long)(a) & 0x00100000)
|
||||
#define READ(f, b, c) pread((f), (void *)LOADADDR(b), (c))
|
||||
#define BCOPY(s, d, c) vpbcopy((s), (void *)LOADADDR(d), (c))
|
||||
#define BZERO(d, c) pbzero((void *)LOADADDR(d), (c))
|
||||
|
||||
int loadfile __P((const char *, u_long *));
|
||||
#define LOAD_START 0
|
||||
#define LOAD_NSYM 1
|
||||
#define LOAD_SYM 2
|
||||
#define LOAD_END 3
|
||||
#define LOAD_MAX 4
|
||||
|
||||
void vpbcopy __P((const void *, void *, size_t));
|
||||
void pbzero __P((void *, size_t));
|
||||
ssize_t pread __P((int, void *, size_t));
|
||||
Loading…
Reference in New Issue