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bootxx.c revision 1.2 
      1 /*	$NetBSD: bootxx.c,v 1.2 2000/09/26 09:48:35 wdk Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jonathan Stone, Michael Hitch, Simon Burge and Wayne Knowles.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Copyright (c) 1992, 1993
     41  *	The Regents of the University of California.  All rights reserved.
     42  *
     43  * This code is derived from software contributed to Berkeley by
     44  * Ralph Campbell.
     45  *
     46  * Redistribution and use in source and binary forms, with or without
     47  * modification, are permitted provided that the following conditions
     48  * are met:
     49  * 1. Redistributions of source code must retain the above copyright
     50  *    notice, this list of conditions and the following disclaimer.
     51  * 2. Redistributions in binary form must reproduce the above copyright
     52  *    notice, this list of conditions and the following disclaimer in the
     53  *    documentation and/or other materials provided with the distribution.
     54  * 3. All advertising materials mentioning features or use of this software
     55  *    must display the following acknowledgement:
     56  *	This product includes software developed by the University of
     57  *	California, Berkeley and its contributors.
     58  * 4. Neither the name of the University nor the names of its contributors
     59  *    may be used to endorse or promote products derived from this software
     60  *    without specific prior written permission.
     61  *
     62  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     72  * SUCH DAMAGE.
     73  *
     74  *	@(#)boot.c	8.1 (Berkeley) 6/10/93
     75  */
     76 
     77 #include <sys/param.h>
     78 #include <sys/exec_elf.h>
     79 #include <lib/libsa/stand.h>
     80 #include <machine/prom.h>
     81 
     82 typedef void (*entrypt) __P((int, char **, int, const void *));
     83 
     84 int main __P((int, char **));
     85 entrypt loadfile __P((char *path, char *name));
     86 
     87 extern int bcmp __P((const void *, const void *, size_t));	/* XXX */
     88 
     89 /*
     90  * This gets arguments from the PROM, calls other routines to open
     91  * and load the secondary boot loader called boot, and then transfers
     92  * execution to that program.
     93  */
     94 int
     95 main(argc, argv)
     96 	int argc;
     97 	char **argv;
     98 {
     99 	entrypt entry;
    100 	char *cp;
    101 	extern void prom_init __P((void));
    102 
    103 	prom_init();
    104 
    105 	cp = *argv;
    106 
    107         printf("\nNetBSD/mipsco " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n");
    108 
    109 	entry = loadfile(cp, "/boot");
    110 	if ((int)entry != -1)
    111 		goto goodload;
    112 
    113 	entry = loadfile(cp, "/boot.mipsco");
    114 	if ((int)entry != -1)
    115 		goto goodload;
    116 
    117 	goto bad;
    118 
    119  goodload:
    120 	MIPS_PROM(flushcache)();
    121 	entry(argc, argv, 0, 0);
    122 
    123  bad:
    124 	return (1);
    125 }
    126 
    127 /*
    128  * Open 'filename', read in program and return the entry point or -1 if error.
    129  */
    130 entrypt
    131 loadfile(path, name)
    132 	char *path, *name;
    133 {
    134 	int fd, i;
    135 	char *src, *dst, bootfname[64];
    136 	Elf32_Ehdr ehdr;
    137 	Elf32_Phdr phdr;
    138 
    139 	dst = bootfname;
    140 	for (src = path; *src;/**/)
    141 		if ((*dst++ = *src++) == ')')
    142 			break;
    143 	for (src = name; *src;/**/)
    144 		*dst++ = *src++;
    145 	*dst = (char) 0;
    146 
    147 	if ((fd = open(bootfname, 0)) < 0) {
    148 		printf("open %s: %d\n", bootfname, errno);
    149 		goto err;
    150 	}
    151 
    152 	/* read the exec header */
    153 	i = read(fd, (char *)&ehdr, sizeof(ehdr));
    154 	if ((i != sizeof(ehdr)) ||
    155 	    (bcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) ||
    156 	    (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) {
    157 		printf("%s: No ELF header\n", bootfname);
    158 		goto cerr;
    159 	}
    160 
    161 	for (i = 0; i < ehdr.e_phnum; i++) {
    162 		if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0)
    163 			goto cerr;
    164 		if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr))
    165 			goto cerr;
    166 		if (phdr.p_type != PT_LOAD)
    167 			continue;
    168 		if (lseek(fd, (off_t)phdr.p_offset, 0) < 0)
    169 			goto cerr;
    170 		if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz)
    171 			goto cerr;
    172 	}
    173 	return ((entrypt)ehdr.e_entry);
    174 
    175  cerr:
    176 #ifndef LIBSA_NO_FS_CLOSE
    177 	(void) close(fd);
    178 #endif
    179  err:
    180 	printf("Can't load '%s'\n", bootfname);
    181 	return ((entrypt)-1);
    182 }
    183